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- J O H N J A M E S writes on A I D S
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- Copyright 1992 by John S. James;
- permission granted for non-commercial use.
-
- AIDS TREATMENT NEWS Issue #163, November 20, 1992
- phone 800.TREAT-1-2, or 415/255-0588
-
- CONTENTS: [items are separated by "*****" for this display]
-
- Call to Activists: Focus Needed on Early Human Research
- How to Advocate and Build Coalitions for Medical Research
- Funding
- Protecting Body Composition in HIV Infection: Interview
- with Nutritionist Cade Fields Newman
- Announcements
- Berlin International Conference: Dates and Deadlines
- SEARCH Alliance Seeks Medical Director
- Baltimore/Washington Area Clinical Trials Directory
-
- ***** Call to Activists: Focus Needed on Early Human Research
-
- by John S. James
-
- The main obstacle today to better AIDS treatments is early
- in the drug-development pipeline. Hundreds of potential
- antivirals are coming out of laboratories and being published in
- leading journals, but almost none of them move further, through
- FDA-required animal toxicity tests and into early human trials.
- Once a potential drug shows biological activity in humans (by
- decreasing viral measures, or raising T-helper cells, etc.) , it
- would likely get enough attention to be developed appropriately.
- But without such data, a drug is usually ignored, because: (1)
- the scientists who developed it cannot finance clinical research;
- (2) pharmaceutical companies consider many factors other than
- medical or scientific ones in deciding whether to develop an AIDS
- drug; (3) the public has little consistent interest in a chemical
- which has never been tested in humans; and (4) the Reagan-Bush
- administrations did not take responsibility for managing the
- research effort. The resulting catch-22 -- no interest since
- there is no data, no data since there is no interest -- has
- blocked development of almost all potential AIDS drugs, and is
- still blocking them today.
-
- With the new administration, this critical problem could be
- fixed, allowing new treatments to come into use quickly if
- appropriate. As soon as there is evidence that a drug works very
- well, it is likely to move exceedingly rapidly into wider use.
- But if the same drug is never tested in people, or is only tested
- for toxicity in HIV-negative volunteers, the necessary evidence
- will not exist, and the drug will probably be delayed
- indefinitely.
-
- The big danger now is inertia, because no force is yet
- available to make the changes needed. Pharmaceutical companies
- are interested in short-term gain from drugs already on the
- market or soon to be there. Most influential AIDS researchers,
- even when supported largely by federal grants and contracts, also
- have business ties with these companies -- a situation which has
- long distorted research policy and prevented potential new drugs
- from being fairly considered. The Washington, D. C., AIDS policy
- organizations have not historically included research issues in
- their "corporate culture," and might not be able to challenge the
- research community when necessary; yet these organizations will
- manage the articulation of the AIDS consensus which will go to
- the Clinton transition team and administration. Some candidates
- now discussed as potential "AIDS czar" have avoided treatment
- issues, apparently due to unwillingness to challenge their
- scientific colleagues. In short, all the conditions are in place
- for a nightmare of business as usual, which could leave us, in
- several years, about where we are today -- with no major new
- antivirals and little advance in AIDS treatment except for
- refinements in the use of AZT, ddI, and ddC.
-
- AIDS activists can make the difference, by never letting the
- most critical issues in drug development be ignored. So far,
- however, early drug development is scarcely on the table among
- activists. It has been easier to focus on more immediate
- concerns, such as conditions for expanded access, or equity in
- access to clinical trials. These issues are also important, but
- without better drugs, they will not save many lives.
-
- The facts about excellent candidate drugs not getting into
- the development pipeline, or not proceeding coherently to the
- first tests of antiviral activity in humans, have been public
- knowledge for years. Yet this issue has received little
- attention until now, because until this month there was no chance
- of resolving it successfully. Such a pervasive, systemic
- malfunction cannot be repaired without national commitment and
- high-level involvement and support. The FDA could not solve the
- problem by itself; neither could the NIH; neither could any
- private organization. The necessary national mobilization would
- have required engagement and cooperation of higher Federal
- officials, which was not available.
-
- Our biggest enemy today is the inertia of 11 years of
- Federal AIDS mismanagement. What can defeat it is an ongoing
- determination to bring the most critical problems into the light
- of public and professional attention, to keep them there as long
- as necessary, and to insist that they be addressed. AIDS
- activists must take the lead in exposing the seriousness of
- neglecting the flow of new drugs into early clinical development.
-
- * * *
-
- Note: The following is our submission to the National
- Commission on AIDS, which is preparing recommendations for the
- new president and Congress. The Commission requested that these
- statements, which were due November 23, include specific
- recommendations to the executive and legislative branches.
-
- Better AIDS Drugs: The Biggest Obstacle
-
- To improve AIDS/HIV treatment and save lives of those
- already infected, the greatest need by far is better
- antiretroviral drugs. And the main reason progress in new drugs
- has been so disappointingly slow concerns obstacles near the
- beginning of the drug "pipeline" -- in the late preclinical and
- early clinical stages of drug development. This part of the
- development process has been overlooked, not because of
- scientific disagreements but because of systemic political and
- commercial snafus. It urgently needs more attention:
-
- * Because of improvements by the FDA, the blockage near the
- end of the drug pipeline has been greatly reduced; ddI, ddC, and
- now d4T have been made available. The problem is that no major
- anti-HIV drugs are now in the pipeline, except for some, like tat
- and protease inhibitors, which are still very early in clinical
- trials. Therefore, no important advances are likely from the
- mainstream drug-development pipeline for at least several years.
-
- (An FDA press release dated October 19, 1992 said that the
- FDA had "received" more than 500 IND applications "to test drugs
- or biologics that may have potential in treating AIDS and other
- HIV-related conditions." But when the press release listed
- "potential AIDS therapies publicly acknowledged by their sponsors
- to be under study," it had to stretch considerably to include any
- anti-HIV drugs. The following is the FDA's list of "INDs for
- experimental antiviral agents": compound Q, N-butyl DNJ,
- ribavirin, ddC, beta interferon, d4T, and AZDU. None of these is
- likely to be a major advance in HIV treatment, and some appear to
- be dead. Vaccines, which can also be HIV treatments, are listed
- separately; but there is considerable debate about whether any
- therapeutic vaccine has shown clinical benefit or is ready for
- large trials. And as for the drugs the FDA could not name
- because they had not been publicly acknowledged by their
- sponsors, none could have progressed to large human trials
- without being well known. In short, no important HIV drugs will
- emerge for some time. The image of hope and competence projected
- by the press release is an illusion.)
-
- * Dozens if not hundreds of potential anti-HIV drugs or lead
- chemicals have been produced in university and other
- laboratories, tested in viral cultures or in animals, and
- published in major, peer-reviewed journals. Usually development
- stops there, since no one involved has the money to finish the
- preclinical development required or to begin human tests. Since
- no public agency takes responsibility for shepherding these
- compounds into further development if justified, they usually
- wait indefinitely unless some pharmaceutical company picks them
- up -- unlikely when there is no data on biological activity in
- humans.
-
- * The existing AIDS trials networks (ACTG, CPCRA, CBCT) are
- focused on a later stage of research. Today they are often
- conducting dubious trials because they have no compelling drugs
- to study.
-
- * Some people believe that the National Cooperative Drug
- Discovery Group program (NCDDG-HIV) is addressing this problem.
- We have not attended their meetings, but we hear that they focus
- on theories of rational drug design -- which clearly will be the
- ultimate future of drug development, but so far has not been
- effective for AIDS. (Much of the focus is on improving high-tech
- tools such as computer imaging systems, but the drugs produced
- with those tools have not worked.) For the current epidemic, we
- also need empirical development of the most promising leads
- available, even those resulting from chance discoveries instead
- of high-tech science. But this work is undervalued because it is
- usually routine and not glamorous.
-
- * The bottom line is that we are suffering a serious
- imbalance in research, because the drugs which most need
- attention now for saving lives are not well positioned to build
- the constituency needed to motivate their continued development.
- Drugs which are already marketed, or almost ready for marketing,
- can develop industrial, medical, and public constituencies.
- Rational drug design generates both industrial and academic
- support. But no constituency champions a drug developed by one
- scientist or academic team, with no pharmaceutical sponsor, and
- with no human tests.
-
- Recommendations
-
- * The executive branch must take responsibility for
- proactively shepherding critical drugs through the development
- process -- not just wait for some pharmaceutical company to move.
-
- * The U. S. National Cancer Institute has shown that
- government can successfully carry out early human drug
- development when necessary. Both legislative and executive
- branches should expand this work.
-
- * The executive branch should set up a medical research
- ombuds office, where anyone who knows about research snafus of
- any sort can report them, and can expect to get action when
- appropriate. Most of the problems which block clinical trials or
- other research are red-tape accidents which could be cleared up
- by a few phone calls from an office with the president's
- authority behind it. When broader policy issues are involved,
- the office should research and prepare recommendations for the
- executive branch, for Congress, and for foundations, companies,
- and other private organizations.
-
- ***** How to Advocate and Build Coalitions for Medical
- Research Funding
-
- by John S. James
-
- Note: A treatment activist asked us for a memo which he
- could provide to a meeting on the Clinton transition, and we
- drafted the following in response. Because we assumed a friendly
- audience that did not need the humanitarian case restated, we
- focused instead on fitting medical research into Clinton's
- economic and political agenda.
-
- Because we could reasonably presume that AIDS will be
- treated fairly, we discussed medical research overall, not AIDS
- research in particular. This way we could focus on a universal
- appeal, since medical research is important to everyone. And
- this focus opens doors to coalitions with other health
- constituencies.
-
- In the past, we were advised to soften or omit the problems
- in medical research -- especially when Congress was considering
- funding. But now we have the prospect of a serious national
- commitment to AIDS, as well as a major national policy shift from
- military to civilian research. As a result, the problems
- themselves can be an integral part of research advocacy, since
- they point the way to highly cost-effective management efforts.
- Correcting key malfunctions which are preventing the translation
- of research investment into clinical benefits can release
- unimagined opportunities for achieving the results that count --
- better practical treatments for people.
-
- One problem today is the belief in some circles that
- medical-research progress is a root cause of medical cost
- inflation, by producing better but ever more expensive treatments
- -- essentially an argument that in medicine, ignorance is cost
- effective. A closer look shows that cost inflation reflects
- mismanagement, not advancing knowledge.
-
- * * *
-
- Biomedical research is politically unique because it is
- personal in a way that other technologies are not. Everyone
- knows that they and their loved ones may (and probably will) face
- life-threatening illness some day -- and that medical science
- could make the difference between life and death, or between
- recovery and lasting disability. Medical research enhances the
- security of everyone.
-
- Other technologies also save lives, but the public does not
- see them the same way. For example, a recent poll of Maryland
- voters sponsored by Research!America found that 47 percent of
- voters were willing to pay more taxes to increase medical
- research -- several times the level of support for space or
- national defense.
-
- Biomedical research has other advantages:
-
- * If well managed it will reduce the cost of medical care.
- Treatments which work well are usually less resource-intensive
- than those which work poorly and require chronic care. Medical
- cost inflation stems from poor management, from incentives for
- inappropriate use of technology, not from medical advance itself.
- For example, in the Reagan-Bush administration, there was no
- proactive leadership to assert the public interest -- and since
- price competition in medicine is difficult to arrange within
- ethical constraints, the commercial incentives were to research
- and develop the most expensive (and therefore most profitable)
- treatments, even when less expensive approaches could work as
- well or better.
-
- * Medical research stimulates biotechnology, a major area of
- U. S. strength and a key element of the future U. S. economy --
- if we do not lose the lead to Japan, which has long been ahead in
- certain areas, such as fermentation technology.
-
- On the other side, there is public impatience today with
- cancer, Alzheimer's, and AIDS research particularly, because of
- lack of productivity in delivering improved treatments and better
- survival and care. (Some medical fields, such as heart disease
- and ulcer research, have delivered major benefits.) In AIDS,
- where we have reported on research and treatment for six years,
- it is clear that major management problems are inhibiting
- progress, and that these can be fixed. For example, the biggest
- single block today to better AIDS treatments is the lack of a
- workable system for getting the best of the hundreds of promising
- drugs created in laboratories through preclinical and early
- clinical development, to the point of the first test of
- biological activity in 12 to 20 human volunteers. If the drugs
- could get to that point, it would be relatively easy to find
- companies to take the successful ones the rest of the way.
-
- Other major, systemic problems in U. S. medical research
- today include (1) the lack of viable career paths for
- physician/researchers (who are often required to cash in their M.
- D. chips due to accumulated debts before completing research
- training), and (2) the lopsided influence of industry on
- directing government research money, since almost everybody on
- the committees which allocate public money has pharmaceutical
- relationships on the side, resulting in grossly disproportionate
- research emphasis on large-company drugs already marketed or
- nearing the market, and no critical mass of advocates to champion
- newer, emerging technologies. (The latter problem may reflect not
- so much the excessive power of pharmaceutical companies, but
- rather the lack of countervailing assertion of the public
- interest, due to ideological objections in the outgoing
- administration.) No one in government (or elsewhere) has had the
- authority to attack these and other systemic problems.
-
- Much progress has been made in basic research, especially in
- the development of tools and techniques which open doors to
- progress against AIDS, cancer, and many other diseases. But we
- have not had the leadership to fix the obstacles blocking the
- translation of basic knowledge into better treatments and cures.
- With high-level attention, these obstacles can in large part be
- overcome, allowing us to harvest the benefit not only of ongoing
- basic research, but also of the great accumulated research
- investment already made.
-
- *****
-
- Protecting Body Composition in HIV Infection: Interview with
- Nutritionist Cade Fields Newman
-
- by Dave Gilden
-
- The importance of malnutrition in AIDS progression is slowly
- receiving more attention. Specific micronutrient deficiencies
- have been found with HIV that effect immune system function or
- are related to brain and nervous system impairment. [See AIDS
- TREATMENT NEWS #134, September 6, 1991, "Zinc and B Vitamins in
- HIV: Overview and Interview," by Denny Smith; and AIDS TREATMENT
- NEWS #158, September 4, 1992, "Nutrition at VIII International
- Conference on AIDS," by Jason Heyman]. A broader issue is the
- loss of the protein stores located in lean body mass as AIDS
- progresses.
-
- Each individual seems to require a minimum store of protein
- to support life. There is an increasing awareness that death
- among people with AIDS frequently occurs when that limit is
- approached. People with AIDS may be dying from a process similar
- to starvation. Many generalized symptoms of advanced AIDS,
- including lack of energy and decreased ability to concentrate or
- cope independently, could arise from tissue disintegration caused
- by a loss of protein stores.
-
- The chronic, progressively debilitating aspects of AIDS and
- HIV infection require treatment as much as do the acute, life-
- threatening opportunistic infections. The two are interrelated.
- Ensuring proper nutrition is not just a matter of eating the
- right foods. It is a complex task requiring, among other things,
- management of illnesses, mental attitude and drug interactions.
- Sufficient physical exercise is also necessary to maintain or
- recover body composition.
-
- We spoke with Cade Fields Newman, M. S., R. D., about the
- multifaceted nature of nutritional support and its potential
- benefits. Ms. Newman is the founder of The Cutting Edge, a
- nutritional consulting firm in Fremont, California that
- specializes in advising patients with HIV. Besides working with
- individual doctors, she is currently organizing a nutritional
- assessment service for the Physicians Association for AIDS Care
- (PAAC). It will supply member physicians with an evaluation of
- the nutritional status of their patients and recommend ways to
- control nutritional deficits and wasting.
-
- * * *
-
- ATN: How important would you say proper nutrition is?
-
- CFN: Well, if I said I had a drug that would extend a
- patient's life two or three years, that would improve their
- quality of life, that would keep them in a situation where they
- could provide their own care and keep them working, you would
- think people would be flocking to it. Yet, we do have that; it's
- called "nutrition." Although not a stand-alone therapy, it is a
- very important part of overall treatment. And in conjunction with
- all the other things that are done, I believe that we can start
- dealing with HIV as a chronic manageable disease, where a person
- can live a normal, quality lifespan.
-
- ATN: It seems obvious that the earlier one starts a
- nutrition plan the better. Once you become sick and lose
- considerable amounts of weight, it will be hard to recover. So,
- where does one start?
-
- CFN: Yes, prevention is absolutely key for a person to have
- this vague thing called quality of life. But nutrition is not
- even a good stand-alone therapy to support nutritional stores.
- What is required is a strong partnership between patient and
- physician, hopefully with a multidisciplinary team's input. The
- patient has to be captain of a team. For instance, I'm a
- dietitian, but I cannot solve swallowing problems. You may need
- a speech therapist to evaluate that. Or there might be a problem
- with peripheral neuropathy and carrying out the tasks of daily
- living. Then, an occupational therapist should come in, or if
- there are problems with range of motion or movement, a physical
- therapist. There should be a pharmacist to advise on the effects
- of medications on nutrient utilization. Also, there are the
- nurses. Patients see them more than anyone else, especially
- home-care patients.
-
- All of us are simply advisers. It's the patient's choice.
- It is very important that they can assemble this team and that it
- does what they want. Otherwise people get advice on nutrition
- from persons who do not have access to their medical records.
- There is no way such persons can put together nutritional advice
- that matches that person's individual medical profile.
-
- ATN: But nutritional advice is not all that common at a
- physician's office. Most doctors don't have much nutritional
- training. How common is this ideal sort of team that you are
- talking about?
-
- CFN: It varies from place to place. It occurs when you
- have strong-minded, assertive patients who insist on it. It's a
- growing phenomenon. A lot of us talked about team work for years
- without doing anything about it, but now patients are insisting
- on it.
-
- The doctor has to be in tune with what's happening. If the
- patient cannot maintain adequate nutritional stores, then medical
- therapies will fail. Drug therapies depend on your protein
- stores, for instance on your serum albumin to carry that drug
- where it needs to go. Oral drugs depend on your ability to
- absorb. That, too, is based on nutritional status. At least,
- primary care physicians need to monitor overall treatments to
- make sure that they do not conflict. That cannot be done unless
- people are working together as a team.
-
- ATN: I want to talk about what this team will advise in
- nutritional support. But first can we briefly describe the
- sources of inadequate nutritional balance in HIV infection and
- AIDS?
-
- CFN: There are three major reasons for malnutrition in HIV-
- related disease. The first is decreased intake. That could be
- because of anorexia -- just a lack of appetite -- which could
- happen with depression or some of the drug interactions, a number
- of different things. The second part of this is malabsorption,
- which happens quite often with HIV-related diseases in the
- gastrointestinal track. These two considered together would be
- reasons for the body to starve.
-
- Besides this, the inflammatory response of the body to HIV
- uses up protein stores in muscle tissue. This creates a major
- risk for malnutrition. Also, the altered metabolism of nutrients
- allows a person to hold onto and even generate fat stores while
- maintaining or building lean tissue is difficult.
-
- Nutrient transport within the body may also undergo
- alterations. For instance, in a number of patients with advanced
- disease, there are indications of an iron deficiency although
- there may be other signs that there is plenty of iron. It looks
- like iron is not going where it needs to go, and just
- supplementing with iron is not going to help.
-
- The picture is much more complex than not getting enough
- food or malabsorption, and that's what makes nutritional
- intervention so difficult. Often we talk about this particular
- chemical in the body doing that particular thing, but there may
- be many different metabolic pathways that have to be set right.
-
- ATN: OK, so let's start at the simplest level. What are
- the first steps an asymptomatic person with HIV should consider
- for nutritional intervention?
-
- CFN: Well, I know it's not hi-tech, but food is going to be
- the best thing a person can do. When we second-guess nutrition
- and try to package it into little things to give people, we
- sometimes get into trouble. Food has many substances in it that
- we don't know much about and that might be very important.
-
- If I were to prioritize what a person needs, the number one
- priority would be fluids because without adequate hydration,
- nothing works. The second priority would be calories, because
- without enough energy it doesn't matter what you are getting in
- terms of protein. It will not go where it needs to go. The
- third priority is protein, and the fourth priority is vitamins
- and minerals, which cannot be used by the body without the first
- three.
-
- ATN: It's important to stress that problems with food
- intake might be problems with energy -- not preparing food or
- feeling energetic enough to eat.
-
- CFN: Absolutely. You need to figure out for each person
- what they need, what they're getting, and strategies for getting
- it. And when they're having a bad day, they should have a stash
- of food on board. Many people do not have that, and when they go
- through two or three bad days, they get behind. At least if they
- had a supply of food supplements, even instant breakfast, they
- could get through better.
-
- Cooking can be very energy-draining; don't feel strange
- about asking for help. If someone wants to cook for you, let
- them do it. Nutrition covers quite a span. Sometimes we get so
- caught up in the biochemical changes in the liver, when a simple
- chair in the kitchen or a better pair of eyeglasses would make
- the biggest difference.
-
- For a person who is completely asymptomatic, a basic piece
- of advice is to learn fundamental nutritional principles. Learn
- how nutrition interacts with immunity -- from a serious source,
- not from some popular magazine. Food safety -- proper storage,
- cleaning and cooking -- is another very important skill to learn.
- There are a number of opportunistic infections that could be
- prevented if food safety were higher on people's lists.
-
- ATN: Isn't there data that you should start collecting to
- check on your nutritional status?
-
- CFN: Yes, you should develop some individual strategies you
- can put together to make sure you are getting what you need on a
- day to day basis, but you should also develop a good contact that
- will answer your questions and monitor your body composition
- every six months. Weight is not a good early indicator; its loss
- shows that a lot of things have already happened. It is very
- important to get baseline data so you can know what the trends
- are in mid-arm circumference and triceps skinfold [a measurement
- of fat stores] and so forth. These measurements reveal more than
- weight alone does about the present state of body composition.
-
- You also need to monitor medical therapies. Many people are
- taking many medicines. Drug interactions with the body, such as
- nausea, vomiting, diarrhea, and toxicities to liver, kidney and
- pancreas, can put you at risk nutritionally Another factor to
- monitor is markers of nutritional status. Albumin in the blood is
- a good general indication of the state of the body's protein
- stores, although infections can make this go down without any
- relation to nutrition.
-
- ATN: Are there specific nutrients that you would suggest
- emphasizing in the diet?
-
- CFN: I would concentrate on a nutrient-dense diet. This
- means that calorie per calorie you get a good amount of the other
- things you need, like protein and vitamins and minerals. Your
- priorities are still fluids, calories and proteins, and then
- micronutrients [vitamins, minerals, etc.]. Most people ask about
- vitamins, but you need the first three to get any benefits at all
- from the last one. I would concentrate on fluid-containing,
- calorie-containing and protein-containing foods and then make
- sure I got adequate micronutrients.
-
- A group from the University of Miami in Florida did
- recommend some very specific things in regard to supplementation
- [M. K. Baum and others, "Interim Dietary Recommendations to
- Maintain Adequate Blood Nutrient Levels in Early HIV-1
- Infection," VIII International Conference on AIDS, Amsterdam,
- July 19-24, 1992, abstract #PoB3675]. In early HIV infection,
- increased intake of zinc and vitamins B2, B6, B12, A [or beta
- carotene equivalent], C, and E, on the order of six to 25 times
- the RDA [depending on the nutrient; more than six times for some
- of them could be harmful. See full report in M. K. Baum and
- others, "Influence of HIV Infection on Vitamin Status and
- Requirements," ANNALS OF THE NEW YORK ACADEMY OF SCIENCES, volume
- 669, pages 166-174], was found necessary to maintain adequate
- blood levels of these substances in some patients. We don't know
- yet how helpful normalizing these values is going to be. This is
- just an interim recommendation. But we have seen people improve
- cognitive function by normalizing B12 -- an important nutrient to
- pay attention to if there is a decline in its level. Similarly,
- B6 seems to be important in protecting against neuropathy,
- although an overdose of B6 also causes neuropathy.
-
- A generic recommendation would be just to eat adequate foods
- and from there add a multivitamin maybe once or twice a day. You
- have to be careful about what you're taking. Nutrients, like
- drugs, can be very toxic, especially for people with HIV. A
- number of HIV-positive people may already have problems with
- chronic hepatitis or other organ infections. If you have liver
- or kidney dysfunction or any pancreatic dysfunction -- maybe you
- have been on ddI -- nutrients are not metabolized in the normal
- way. And a number of drugs are toxic to the liver. This adds to
- the potential compromise and toxicity when you take something
- like vitamin A.
-
- ATN: Do you favor other special dietary supplementation?
-
- CFN: If a person cannot take in enough calories -- maybe
- there's a problem with swallowing or someone just cannot fit in
- the nutrients they need -- you can go to the calorie-packed
- liquid supplements. You can use those to augment nutrition,
- preferably, and in some cases replace whole meals. Stocking up on
- these oral supplements is another way of preparing for bad days.
-
- A different kind of supplementation is exercise. Regular
- exercise is highly beneficial. Also, if you want or need to gain
- weight, then you need to do so along with exercise because
- padding yourself with fat is not particularly helpful. If an
- opportunistic infection occurs, you need protein stores to resist
- it and make your drug therapies work.
-
- There is a high correlation between muscle mass and clinical
- well-being. Protein makes the body function; immunity is based
- on protein stores, too. And exercise promotes protein formation
- in tissues throughout the body. Here, resistance exercise, like
- body building, is more important than aerobic exercise.
-
- Another strategy that promotes protein-building is regular,
- frequent meals. One study found that people who eat at least
- four times a day, including a snack an hour or so before
- sleeping, did better in terms of nitrogen balance than anyone who
- ate less than four times a day. Fortifying protein stores should
- be a central preparation for coping with AIDS.
-
- ATN: When severe immune deficiency does come about, what
- are the issues then?
-
- CFN: Most people who lose weight in conjunction with an
- opportunistic infection have a hard time gaining it back, if they
- ever do. And when they do gain it back, they may not gain back
- the protein stores they need, just fat and fluids. This is the
- central problem.
-
- ATN: Aren't there ways to recover?
-
- CFN: Yes, there are four strategies for regaining lean body
- mass, and nutritional support is only one of them. The first
- defense is prompt and effective treatment for opportunistic
- infections when prophylaxis fails. We can prevent much
- malnutrition by stopping the cascade of events surrounding
- opportunistic infections.
-
- The second line of the defense is hormonal modulation and
- anti-inflammatory therapies. Some patients have low testosterone
- levels, for example. By replacing that, you can maintain or
- increase lean body mass because that's one of the effects of
- testosterone.
-
- Elevated cytokines, such as some interleukins, have been
- proposed as causing the wasting effect. I'm not so sure that
- anti-cytokines will prove to be a good therapy by themselves, but
- perhaps they will be helpful in conjunction with other
- treatments.
-
- Anti-inflammatory agents abound. You have to be careful to
- block the harmful aspects of inflammation, those that drain
- protein stores for energy, and not the beneficial ones. Simple
- aspirin and fish oil reduce the level of inflammatory
- prostaglandins to give the body an opportunity to recover lean
- tissue. Fish oil may be more effective earlier rather than
- later, though.
-
- ATN: You mentioned how important exercise is early stages
- of disease, but does it have an effect later on, when movement is
- harder?
-
- CFN: Yes, exercise is the third defense strategy. It is
- still important in protecting body composition or gaining back
- lean body mass after you have lost weight. It's tough when you
- are experiencing a lot of fatigue or physical limitations, but
- there are people who can put together exercise programs even for
- those who are in wheelchairs.
-
- ATN: And nutritional support is the fourth strategy?
-
- CFN: Finally, we come to ensuring an adequate diet. In
- AIDS, a host of opportunistic infections affect eating. We
- mentioned aspirin before; that and other anti-inflammatories are
- also used for pain management. Pain management is an issue that
- is not fully addressed for many people with AIDS, and it can be
- key, not only for overall quality of life, but also for the
- ability to eat.
-
- Just about everybody with AIDS will have diarrhea at some
- point, despite attention to food safety. Treating the underlying
- cause of diarrhea, if possible, is the most effective course of
- action. Also, anti-diarrhea drugs may be combined with
- nutritional strategies. Fasting during episodes of diarrhea is
- not recommended. Emphasizing sources of soluble fibers (such as
- bananas, oatmeal, applesauce and potatoes) while removing sources
- of crude fiber and maintaining an overall balanced diet is more
- appropriate. Replacing lost fluid and electrolytes, especially
- potassium and sodium, is crucial.
-
- ATN: Rehydration and electrolyte replacement can take place
- intravenously as well as through the diet. Eventually, simple
- dietary techniques may not be enough to provide sufficient
- nutrition. Liquid food supplements can be added when someone
- cannot or does not take in enough food for whatever reason.
- Feeding through a tube to the stomach also has its place in
- people physically unable to eat. But in the extreme case, there
- is parenteral feeding (through a catheter attached to a vein),
- which avoids the GI tract entirely. What role does it play?
-
- CFN: Partial or total parenteral nutrition can help people
- get over the hump when disease causes extreme malabsorption. It
- is necessary to start early, though. Don't let people not eat
- for three to fourteen days before introducing parenteral
- nutrition.
-
- Parenteral nutrition does not have to be permanent. People
- feel that if they go on TPN [total parenteral nutrition], they're
- stuck with it forever. That is not true. In certain diagnoses,
- such as CMV colitis, people may be maintained on TPN throughout
- their lifetime. Even then, they can modify oral intake and in
- some cases reduce their dependency on TPN.
-
- The second point I would like to make is that aggressive
- support does not equal TPN. You can be aggressive with peas and
- carrots and palliative with TPN. To find out what the appropriate
- support is, the patient can be clinically profiled into
- diagnostic sub-groupings. For instance, if the person is
- experiencing some depression and is adequately absorbing
- nutrients, they may simply need to focus on "maximizing food
- intake," by eating nutrient-dense foods.
-
- ATN: What about using Megace [synthetic progesterone] or
- Marinol [synthetic THC, the active ingredient in marijuana] to
- stimulate appetite?
-
- CFN: Marinol seems to work well for nausea, and some
- patients prefer it for increasing appetite. Some people complain
- about feeling drugged out, though. Some say that smoking
- marijuana works better. It's quicker, and avoids their queasy
- stomach. But the smoke can present a problem, especially for
- those with respiratory infections.
-
- Patients on Megace tend to gain fat, according to studies
- using therapeutic doses of 800 mg/day. Many people use a lot
- less than that. It has been speculated that a slow weight gain
- associated with lower than established therapeutic doses may
- include more lean body mass. When used with people who have a
- mechanical or pain reason not to eat (rather than reduced
- appetite), Megace may be detrimental through increasing the
- desire and not the ability to eat.
-
- In advanced HIV infection, you may have "futile cycling" of
- fat going on, where fat stores are broken down in the liver and
- then rebuilt by the liver. This wasteful process results in
- consumption of body protein for energy. If you throw
- rehabilitative levels of calories at someone in this state, you
- may just get more fat and not the protein stores that are needed.
-
- ATN: Appetite is closely tied to mental outlook. And
- mental outlook can be impaired by not eating. This brings up the
- relation of mental health support to nutritional therapies.
-
- CFN: Help in avoiding depression or handling stress becomes
- more and more necessary as HIV infection progresses. It is key
- to motivating HIV-positive people to follow other therapies.
- Again, nutritional support, like medical support, will not be
- most effective all by itself, as a stand-alone therapy.
-
- ATN: Also, speaking of specific substances like Megace or
- Marinol, I notice we haven't spoken much about specific vitamins
- and minerals later on in the disease.
-
- CFN: The significance of vitamin and mineral deficiencies
- are not well established. Other micronutrients that we look at
- besides the ones mentioned before in connection with the
- University of Miami group include selenium and folate. One
- doctor I know has had good results improving patients' quality of
- life with magnesium supplements. But micronutrient deficiencies
- seem to be geographically dependent. Some of this has to do with
- the minerals in the local soil. A major factor is the variation
- from place to place in the way physicians treat AIDS. Drug
- interactions have a large influence on micronutrient absorption
- and utilization. For example, pyrimethamine and trimetrexate,
- which are used in treating toxoplasmosis and pneumocystis,
- interfere with folate metabolism.
-
- ATN: So, when taking vitamins and minerals, you have to
- understand the roots of the deficiencies?
-
- CFN: Oh yes. Blood indications of low iron may not be
- resolved by iron supplementation if it is really a cellular level
- nutrient transport problem due to low protein stores.
-
- You need to see what is best for the patient. If
- micronutrient levels normalize, is that valuable, or are other
- things going on that are still disruptive? Again, addressing
- problems that may cause alterations in nutritional, and
- specifically micronutrient, status may be most effective.
-
- ATN: Where patients find reliable information about
- nutrition, and learn more about the full potential for dietary
- changes to modify disease progression?
-
- CFN: Patient information is available through a number
- sources. To get a listing of educational pieces designed for HIV
- patients you can contact the National AIDS Information
- Clearinghouse at 1-800-458-5231.
-
- To find dietitian services for evaluation and counseling,
- request a referral from your physician. The next step is to
- locate a dietitian who has training and experience in HIV-
- related nutritional issues.
-
- Also, contact major city public health departments and ask
- for phone numbers of AIDS nutritional networks. In the New York
- area, you can contact Nutritionists in AIDS Care at 212-439-
- 8073. Arizona, California and other states have networks as
- well. Several AIDS support agencies have added dietitians to
- their staffs, including the San Francisco AIDS Foundation, and
- Bronx AIDS Services. Local home meal delivery services can also
- be a place to start.
-
- [Note: To contact HIV nutrition specialists at The Cutting
- Edge, the organization founded by Cade Fields Newman, call 510-
- 797-9768.]
-
- ***** Announcements:
-
- ** Berlin International Conference: Dates and Deadlines
-
- The major international AIDS conference of 1993 will be the
- IXth International Conference on AIDS, Berlin, June 7-11, in
- affiliation with the IVth STD World Congress. Abstracts, on an
- original copy of the form provided by the conference and with
- five photocopies, must be received no later than January 15,
- 1993.
-
- Advance registration before January 31 is at a reduced rate,
- DM 800 regular and DM 250 student. After January 31 and on site,
- registration is DM 950 regular and DM 350 student.
-
- The conference phone number is 49-30-857903-0; fax is 49-30-
- 857903-27.
-
- ** SEARCH Alliance Seeks Medical Director
-
- SEARCH Alliance is seeking a medical director to develop and
- manage community-based clinical trials in Los Angeles. Candidate
- should be an M. D. with strong clinical skills, HIV/AIDS clinical
- trials experience, and knowledge of research methodology. Send
- curriculum vitae to: Board of Directors -- Medical Committee,
- SEARCH Alliance, 7461 Beverly Boulevard, Suite 304, Los Angeles,
- CA 90036, phone 213/930-8820, fax 213/934-3919.
-
- ** Baltimore/Washington Area Clinical Trials Directory
-
- A directory of more than 50 AIDS/HIV clinical trials
- recruiting volunteers in the Baltimore and Washington areas has
- been published by AIDS Action Baltimore. The directory includes
- trials at Johns Hopkins University, the University of Maryland,
- Georgetown University, the National Institutes of Health, Walter
- Reed Army Institute of Research, Whitman-Walker Clinic, Chase-
- Brexton Clinic, and other locations, including community-based
- trials through physicians' offices. Vaccine trials (for HIV-
- positive volunteers), pediatric studies, and expanded-access
- programs are listed.
-
- The 36-page directory includes a trials index, a glossary,
- and notes on other relevant publications and resources.
-
- For a copy of The Directory of Clinical Research in AIDS for
- Baltimore & Washington, September 1992, contact AIDS Action
- Baltimore, 2105 North Charles St., Baltimore, Maryland, 21218,
- phone 410/837-2437.
-
- ***** AIDS TREATMENT NEWS Published twice monthly
-
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- San Francisco, CA 94141
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- Editor and Publisher:
- John S. James
- Medical Reporters:
- Jason Heyman
- John S. James
- Nancy Solomon
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-
- Statement of Purpose:
- AIDS TREATMENT NEWS reports on experimental and
- standard treatments, especially those available now. We
- interview physicians, scientists, other health
- professionals, and persons with AIDS or HIV; we also
- collect information from meetings and conferences,
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- and found combinations which work for them. AIDS
- Treatment News does not recommend particular
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-
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- ISSN # 1052-4207
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- Copyright 1992 by John S. James. Permission granted for
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