home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload Trio 2
/
Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
/
dir26
/
med9408a.zip
/
M9480033.TXT
< prev
next >
Wrap
Text File
|
1994-08-09
|
3KB
|
50 lines
Document 0033
DOCN M9480033
TI Differential sensitivities of viruses in red cell suspensions to
methylene blue photosensitization.
DT 9410
AU Wagner SJ; Robinette D; Storry J; Chen XY; Shumaker J; Benade L; Product
Development Department, Jerome H. Holland Laboratory,; American Red
Cross Blood Services, Rockville, Maryland.
SO Transfusion. 1994 Jun;34(6):521-6. Unique Identifier : AIDSLINE
MED/94295069
AB BACKGROUND: Previous studies explored the feasibility of using the
photosensitizer methylene blue (MB) as a virucidal agent in red cell
suspensions. Under treatment conditions (5 microM [5 mumol/L] MB, 3.4 x
10(4) J/m2) that resulted in more than 6 log10 inactivation of vesicular
stomatitis virus (VSV) or of the enveloped bacteriophage phi 6, red cell
membrane alterations were observed. Increased red cell ion permeability
and the binding of plasma proteins to the red cell surface were the most
sensitive indicators, which varied in a dose-dependent fashion. STUDY
DESIGN AND METHODS: Inactivation of three additional extracellular
viruses and intracellular human immunodeficiency virus type 1 (HIV-1)
was assessed after MB phototreatment of red cell suspensions. Potassium
leakage and IgG binding also were characterized in MB-treated red cell
suspensions that were exposed to low-fluence light (6 x 10(3) J/m2).
RESULTS: Different viruses exhibit a wide range of sensitivities to MB
photoinactivation. For example, phototreatment conditions (5 microM [5
mumol/L] MB, 3.4 x 10(4) J/m2) that inactivated more than 6 log10 of VSV
did not inactivate the nonenveloped picornavirus, encephalomyocarditis
virus. In contrast, lower fluences (6 x 10(3) J/m2) inactivated
approximately 5 log10 or more of Sindbis virus and approximately 4log10
of extracellular HIV-1. These less stringent phototreatment conditions
(5 microM [5 mumol/L] 6 x 10(3) J/m2) caused lower rates of red cell
potassium leakage (reduction by 6-fold) and little or no binding of
plasma proteins to the red cell surface, compared to values observed
previously with higher fluences. However, neither 6 x 10(3) nor 4.1 x
10(4) J per m2 fluences resulted in any inactivation of intracellular
HIV as represented by changes in the amount of p24 antigen produced
during co-culture of actively infected H9 cells. CONCLUSION: MB-based
protocols would require the use of high-efficiency (> 6log10) white
cell-reduction filters or additional inactivation steps to deplete or
inactivate intracellular virus.
DE Encephalomyocarditis Virus/DRUG EFFECTS Erythrocytes/*MICROBIOLOGY
Hepatitis C Viruses/DRUG EFFECTS Human HIV-1/*DRUG EFFECTS IgG/BLOOD
Kinetics Light Methylene Blue/*PHARMACOLOGY Photosensitizing
Agents/*PHARMACOLOGY Potassium/BLOOD Sindbis Virus/DRUG EFFECTS
Support, Non-U.S. Gov't Viruses/*DRUG EFFECTS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).