home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9605a.zip
/
M9650164.TXT
< prev
next >
Wrap
Text File
|
1996-03-09
|
3KB
|
52 lines
Document 0164
DOCN M9650164
TI Activation of lavage lymphocytes in lung injuries caused by radiotherapy
for lung cancer.
DT 9605
AU Nakayama Y; Makino S; Fukuda Y; Min KY; Shimizu A; Ohsawa N; First
Department of Internal Medicine, Osaka Medical College,; Japan.
SO Int J Radiat Oncol Biol Phys. 1996 Jan 15;34(2):459-67. Unique
Identifier : AIDSLINE MED/96158778
AB PURPOSE: Radiation pneumonitis sometimes extends beyond the irradiated
area of a lung and can also affect the opposite lung. Some immunological
mechanisms, in addition to simple direct injury of the lungs by
radiation, seem to be involved in the onset of radiation pneumonitis. To
clarify such mechanisms, the effects of radiation on local inflammatory
cells in lungs, in particular, lymphocytes, were examined. METHODS AND
MATERIALS: A comparison was made of bronchoalveolar lavage fluid (BALF)
findings from 13 irradiated patients (RT group) and 15 nonirradiated
patients (non-RT group) with lung cancer. Patients who later developed
radiation pneumonitis (RP group) and those who did not (RP-free group)
were also compared. Using a two-color flowcytometer, radiation-induced
changes in local inflammatory cells in lungs were analyzed. This
included analyses of human leukocyte-associated antigen (HLADR) and
intercellular adhesion molecule-1 (ICAM-1) expression on T-cells, which
are though to be involved in cell activation and interactions between
cells. RESULTS: The following aspects of BALF were higher in the RT
group than in the non-RT group: (a) the percentage of lymphocytes and
eosinophiles; (b) the incidence of HLADR-positive CD4+T-cells and
HLADR-positive CD8+T-cells; and (c) the incidence of ICAM-1--positive
T-cells. The following aspects of BALF were higher in the RP group than
in the RP-free group: (a) the total cell counts; (b) the percentage of
lymphocytes; and (c) the incidence of ICAM-1-positive T-cells. A
significant relationship was seen between the incidence of ICAM-1
expression on T-cells and the number of days from the initiation of
radiotherapy to the onset of radiation pneumonitis. CONCLUSION: These
data suggest that irradiation can induce accumulation of activated
T-cells (HLADR and ICAM-1--positive T-cells) in the lung. This
accumulation may be closely linked to radiation-induced lung injury. It
is also suggested that the incidence of ICAM-1--positive T-cells in BALF
may serve as a useful clinical marker of radiation pneumonitis.
DE Adult Aged Bronchoalveolar Lavage Fluid/*CYTOLOGY Carcinoma,
Non-Small-Cell Lung/PATHOLOGY/*RADIOTHERAPY Carcinoma, Small
Cell/PATHOLOGY/*RADIOTHERAPY CD4-Positive
T-Lymphocytes/CHEMISTRY/*RADIATION EFFECTS CD8-Positive
T-Lymphocytes/CHEMISTRY/*RADIATION EFFECTS Female Human HLA-DR
Antigens/*ANALYSIS Intercellular Adhesion Molecule-1/*ANALYSIS Lung
Neoplasms/PATHOLOGY/*RADIOTHERAPY Lymphocyte Transformation Male
Middle Age Radiation Pneumonitis/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).