Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes
Aim: To study expression of major histocompatibility complex (MHC) classes І and ІІ antigens and CD25, CD71, Ki-67, CD54, CD56, CD11b, PCNA on lymphocytes and tumor cells and antitumor action of lymphocytes activated with IL-2. Materials and Methods: Tumor explants (soft tissue sarcoma, n = 20, mela...
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Інститут експериментальної патології, онкології і радіобіології ім. Р.Є. Кавецького НАН України
2006
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| Цитувати: | Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes / N.M. Berezhnaya, U.D. Vinnichuk, O.B. Belova, V.V. Baranovich // Experimental Oncology. — 2006. — Т. 28, № 3. — С. 231-234. — Бібліогр.: 22 назв. — англ. |
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irk-123456789-1375702018-06-18T03:06:35Z Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes Berezhnaya, N.M. Vinnichuk, U.D. Belova, O.B. Baranovich, V.V. Original contributions Aim: To study expression of major histocompatibility complex (MHC) classes І and ІІ antigens and CD25, CD71, Ki-67, CD54, CD56, CD11b, PCNA on lymphocytes and tumor cells and antitumor action of lymphocytes activated with IL-2. Materials and Methods: Tumor explants (soft tissue sarcoma, n = 20, melanoma, n = 25) were co-cultivated in diffusion chambers with autologous lymphocytes; antitumor action was evaluated by morphologic patterns of explant’s growth. Expression of CD25, CD71, Ki-67, CD54, CD56, CD11b, PCNA was evaluated by the method of indirect fluorescence using respective monoclonal antibodies. Results: The highest antitumor action of lymphocytes toward soft tissue sarcoma and melanoma cells is observed if tumor cells are expressing MHC class I antigens. In the cases of soft tissue sarcoma no correlation between the level of antitumor activity of lymphocytes and expression of CD25, CD71, Ki-67, CD54, CD56, CD11b, PCNA has been found, whilst in the case of melanoma it is associated with the high level of CD11b expression. Conclusion: There is a direct correlation between sensitivity of soft tissue sarcoma and melanoma cells to action of lymphokin-activated killer cells and the level of MHC class I antigens. Цель: изучить экспрессию антигенов І и ІІ класса главного комплекса гистосовместимости (ГКГ) на лимфоцитах и опухолевых клетках (саркомы мягких тканей и меланома кожи) и противоопухолевое действие лимфоцитов, активированных и неактивированных ИЛ-2 параллельно с экспрессией некоторых рецепторов, характеризующих протеом. Материалы и методы: культивирование эксплантатов опухоли и аутологичных лимфоцитов в диффузионных камерах с дальнейшим изучением противоопухолевого действия лимфоцитов на основании морфологических особенностей роста эксплантатов. Экспрессию антигенов CD25, CD71, Ki-67, CD54, CD56, CD11b, ядерного антигена пролиферирующих клеток (ИПО-38) определяли методом непрямой флуоресценции с помощью соответствующих моноклональных антител. Результаты: наиболее выраженное противоопухолевое действие лимфоцитов как больных саркомами мягких тканей, так и меланомой проявляется по отношению к тем опухолевым клеткам, которые экспрессируют антигены I класса ГКГ. Установлено, что значение экспрессии указанных структур для противоопухолевого действия зависит от биологических особенностей опухоли: зависимости между уровнем противоопухолевой активности и экспрессией изученных рецепторов клетками больных саркомой не выявлено. В то же время наиболее выраженное противоопухолевое действие лимфоцитов больных меланомой сочеталось с высоким уровнем экспрессии ими CD11b. Выводы: установлена прямая зависимость чувствительности опухолевых клеток к действию лимфокинактивированных клеток от уровня экспрессии антигенов ГКГ I класса на клетках как меланомы, так и сарком. 2006 Article Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes / N.M. Berezhnaya, U.D. Vinnichuk, O.B. Belova, V.V. Baranovich // Experimental Oncology. — 2006. — Т. 28, № 3. — С. 231-234. — Бібліогр.: 22 назв. — англ. 1812-9269 http://dspace.nbuv.gov.ua/handle/123456789/137570 en Experimental Oncology Інститут експериментальної патології, онкології і радіобіології ім. Р.Є. Кавецького НАН України |
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Original contributions Original contributions |
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Original contributions Original contributions Berezhnaya, N.M. Vinnichuk, U.D. Belova, O.B. Baranovich, V.V. Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes Experimental Oncology |
| description |
Aim: To study expression of major histocompatibility complex (MHC) classes І and ІІ antigens and CD25, CD71, Ki-67, CD54, CD56, CD11b, PCNA on lymphocytes and tumor cells and antitumor action of lymphocytes activated with IL-2. Materials and Methods: Tumor explants (soft tissue sarcoma, n = 20, melanoma, n = 25) were co-cultivated in diffusion chambers with autologous lymphocytes; antitumor action was evaluated by morphologic patterns of explant’s growth. Expression of CD25, CD71, Ki-67, CD54, CD56, CD11b, PCNA was evaluated by the method of indirect fluorescence using respective monoclonal antibodies. Results: The highest antitumor action of lymphocytes toward soft tissue sarcoma and melanoma cells is observed if tumor cells are expressing MHC class I antigens. In the cases of soft tissue sarcoma no correlation between the level of antitumor activity of lymphocytes and expression of CD25, CD71, Ki-67, CD54, CD56, CD11b, PCNA has been found, whilst in the case of melanoma it is associated with the high level of CD11b expression. Conclusion: There is a direct correlation between sensitivity of soft tissue sarcoma and melanoma cells to action of lymphokin-activated killer cells and the level of MHC class I antigens. |
| format |
Article |
| author |
Berezhnaya, N.M. Vinnichuk, U.D. Belova, O.B. Baranovich, V.V. |
| author_facet |
Berezhnaya, N.M. Vinnichuk, U.D. Belova, O.B. Baranovich, V.V. |
| author_sort |
Berezhnaya, N.M. |
| title |
Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes |
| title_short |
Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes |
| title_full |
Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes |
| title_fullStr |
Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes |
| title_full_unstemmed |
Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes |
| title_sort |
antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of mhc classes i and ii antigenes |
| publisher |
Інститут експериментальної патології, онкології і радіобіології ім. Р.Є. Кавецького НАН України |
| publishDate |
2006 |
| topic_facet |
Original contributions |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/137570 |
| citation_txt |
Antitumor action of lymphokin-activated сеlls of patients with soft tissue sarcomas and melanomas in dependence on expression of MHC classes I and II antigenes / N.M. Berezhnaya, U.D. Vinnichuk, O.B. Belova, V.V. Baranovich // Experimental Oncology. — 2006. — Т. 28, № 3. — С. 231-234. — Бібліогр.: 22 назв. — англ. |
| series |
Experimental Oncology |
| work_keys_str_mv |
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| first_indexed |
2025-07-10T02:36:11Z |
| last_indexed |
2025-07-10T02:36:11Z |
| _version_ |
1837225713678155776 |
| fulltext |
Experimental Oncology 28, 231–234, 2006 (September) 231
Expression of MHC of classes I and II antigens is
one of the major characteristics of lymphocytes and
tumor cells. As a rule, different alterations of the genes
coding these antigens are leading to the disturbance
of their functioning or significantly affect immuno-
logic response. That’s explaining why the patterns of
genotype of lymphocytes and tumor cells, in particular
expression of MHC antigens plays significant role in
recognition of tumor antigens with the following lysis of
tumor cells. Such statement is proved in a number of
studies, at the first hand - in classic works of R. Zinker-
nagel [1, 2] where it is reported that immunological
response occurs only upon expression of the same
MHC alleles on lymphocytes and tumor cells.
In the last years a number of publications are
arguing that efficacy of immunotherapy depends on
expression of the alleles of MHC antigens that repre-
sent discrete peptides of tumor cells in each concrete
case. For example, it was shown that such peptides
of prostate cancer cells are represented by HLA-A24,
and particularly these molecules are inducing specific
immune response if tumor cells express HLA-A24 [3].
Similar data were received in the research of specific
response of T-lymphocytes of patients with gastric
cancer; these lymphocytes are lyzing tumor cells if
both types of the cells express HLA-A2 or HLA-A24
antigens [4].
An important role in interactions between lympho-
cytes and tumor cells belongs to the patterns of their
proteome composed from a variety of receptor and
antigens, each of which is controlled by respective
genes. Disturbance of their functions results in pro-
teome alterations.
Realization of cytotoxic action depends on expres-
sion of MHC classes I and II antigens and patterns of
proteome; however, the question — at what degree
such dependence affects the efficacy of cytotoxic
action of lymphokin-activated cells (LAK) — requires
further examination. At the same time, adoptive immu-
notherapy of cancer with the use of LAK is known to oc-
cupy one of the central places in cancer imunotherapy.
Presently the use of IL-2 for activation of lymphocytes
is the mostly widely used approach [5, 6].
Since the first report on LAK-phenomenon, it became
the subject of active studies (phenotypic characteristics
of LAK cells, intensity of their killer activity, patterns of
action of LAK isolated from different subpopulations of
cells, research of LAK migration in the body). However,
the results are contradictory, possibly due to application
of different approaches for generation of LAK (doses of
IL-2, terms of cultivation, the sourse of lymphocytes,
their phenotype etc) [7–9].
As it is mentioned above, the role of patterns of
LAK phenotype and tumor cells in their interaction
remained poorly studied yet; but single reports are
demonstrating that therapeutic effect of immuno-
therapy with the use of IL-2-activated LAK depends
on phenotype of these cells, too [10]. However, in one
cases expression of MHC antigens has been studied
only on tumor cells, in other cases — only on LAK. So,
it looks reasonable to study the role of expression of
MHC antigens and other components of proteome by
tumor cells and LAK for their interaction.
The first stages of interaction between LAK and
target cells is the expression of adhesion molecules
CD11a/CD18, CD54; in some publications it has been
reported that the expression of mentioned proteins
and MHC class I antigens occurs simultaneously
Antitumor Action oF lymphokin-ActivAted сеlls oF pAtients
with soFt tissue sArcomAs And melAnomAs in dependence
on expression oF mhc clAsses i And ii Antigenes
N.M. Berezhnaya*, U.D. Vinnichuk, O.B. Belova, V.V. Baranovich
R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology,
National Academy of Sciences of Ukraine, Kyiv 03022, Ukraine
Aim: To study expression of major histocompatibility complex (MHC) classes І and ІІ antigens and CD25, CD71, Ki-67, CD54,
CD56, CD11b, PCNA on lymphocytes and tumor cells and antitumor action of lymphocytes activated with IL-2. Materials and
Methods: Tumor explants (soft tissue sarcoma, n = 20, melanoma, n = 25) were co-cultivated in diffusion chambers with autologous
lymphocytes; antitumor action was evaluated by morphologic patterns of explant’s growth. Expression of CD25, CD71, Ki-67,
CD54, CD56, CD11b, PCNA was evaluated by the method of indirect fluorescence using respective monoclonal antibodies. Results:
The highest antitumor action of lymphocytes toward soft tissue sarcoma and melanoma cells is observed if tumor cells are expressing
MHC class I antigens. In the cases of soft tissue sarcoma no correlation between the level of antitumor activity of lymphocytes and
expression of CD25, CD71, Ki-67, CD54, CD56, CD11b, PCNA has been found, whilst in the case of melanoma it is associated
with the high level of CD11b expression. Conclusion: There is a direct correlation between sensitivity of soft tissue sarcoma and
melanoma cells to action of lymphokin-activated killer cells and the level of MHC class I antigens.
Key Words: class I and II MHC antigens, LAK, soft tissue sarcoma, melanoma.
Received: August 7, 2006.
*Correspondence: E-mail: berezh@onconet.kiev.ua
Abbreviations used: IL — interleukin; LAK – lymphokin-activated
killer cells; CTL – cytotoxic lymphocytes; MoAbs – monoclonal
antibodies; PBL – peripheral blood lymphocytes; INF – interferon;
MHC – major histocompatibility complex.
Exp Oncol 2006
28, 3, 231–234
232 Experimental Oncology 28, 231–234, 2006 (September)
[11, 12]. The role of expression of ICAM-1 (CD54), in
particular on tumor cells for interaction with LAK has
been shown also by other studies [13], that demon-
strated that application of retinoid acid — compound
increasing expression of the gene controlling ICAM-1
expression in tumor cells — resulted in elevation of
sensitivity of tumor cells to action of LAK. Melanoma
cells expressing MHC antigens became more sensitive
to lyzis with LAK [14]; transfection of human ovarian
cancer cells SKOV3 with IL-2 gene leads to significantly
increased expression of HLA-ABC, HLA-DR, HLA-DQ
molecules [15].
The role of MHC antigens expression on tumor
cells and their positive or negative regulation may sig-
nificantly depend on phenotype of cells, that possess
cytotoxicity. In particular, it was shown that treatment
of tumor cells with INFγ may lead to suppression of
action of LAK obtained from natural killer cells; ex-
pression of such MHC class I molecules as 1a and
1b suppresses cytotoxicity, and such inhibition may
be abolished by treatment with antibodies against
mentioned antigens [16].
The present work, is aimed on the study of MHC
antigens expression on tumor cells as well on LAK
in parallel with detection of the expression of some
receptors, that may play role in LAK-dependent lysis.
There were two main tasks: 1) to evaluate possible
relation between expression of MHC class I and II
antigens on lymphocytes and tumor cells (soft tissue
sarcomas and skin melanomas) and antitumor action
of non-activated and IL-2-activated lymphocytes;
2) to study the role of expression of some receptors
for realization of antitumor action of LAK.
mAteriAls And methods
In the work tumor cells and PBL of 20 patients
with soft tissue sarcoma (liposarcoma (n = 2), rhab-
domyosarcoma (n = 2), fibrosarcoma (n = 3), syno-
vial sarcoma (n = 6), inclassified sarcoma, (n = 2),
angyoleiomyosarcoma (n = 2), malignant mesinchy-
moma, neurosarcoma (n = 1), angyosarcoma (n = 1),
malignant giant cell sarcoma (n = 1)) and 25 patients
with melanoma cured in the Institute of Oncology, AMS
of Ukraine (Kyiv, Ukraine) were used. The patients
were 15–79 years old; from 20 cases with soft tissue
sarcoma, 8 patients were at the II stage of the disease,
10 — at III stage, 2 — at IV stage; from 25 melanoma
cases, 15 patients were at І, ІІ stages, 10 — at ІІІ and
IV stages.
PBL were isolated from heparinized blood by
centrifugation in Ficoll-urograffin gradient (ρ = 1.077).
Isolated tumor cells were obtained by enzymatic dis-
aggregation of tumor tissue with 2 mg/ml collagenase
(Sigma, USA) and 1 ng/ml DNAse (Sigma, USA) for
40 min at 37 ˚С.
Expression of MHC classes I and II antigens, adhe-
sion molecule CD54, transferrine CD71, interleukine-2,
CD25, CD54, CD56, CD11b, antigen of proliferation
Кі-67, nuclear antigen of proliferation on tumor cells
and lymphocytes from patients was studied by the
method of indirect fluorescence using respective
monoclonal antibodies (MoAbs) (Medbiospecter, Rus-
sia; DacoCytomation, Denmark; MoAb IPO-38, IEPOR
NAS, Kiev, Ukraine). Antitumor activity of lymphocytes
was studied by their co-cultivation with tumor cells in
diffusional chambers [17] with the following morpho-
logical examination of the samples.
results And discussion
Comparative evaluation of antitumor action of acti-
vated (LAK) and non-activated lymphocytes of the pa-
tients with soft tissue sarcoma has shown that PBL are
characterized by expression of high level MHC class
I antigens and low level — of class II, whilst IL-2 does
not alter significantly their expression levels. Upon
influence of IL-2, expression of CD25 varied in a wide
range; that fact may be explained by individual patterns
of lymphocytes of these patients (Table 1).
On the base of the results of studied interactions
between tumor cells and PBL, the patients were
grouped as follow: 1) patients possessing PBL and LAK
with marked antitumor activity, 2) patients possessing
PBL and LAK without antitumor activity.
Table 1. Expression of MHC class І and ІІ by activated (LAK) and not activated
(PBL) lymphocytes and tumor cells of patients with soft tissue sarcoma
Marker Antitumor activity
(% cells) + –
PBL LAK TC PBL LAK TC
HLA-ABC 78.7 ± 7.3 80.4 ± 3.0 28.5 ± 6.8 71.6 ± 7.5 81.2 ± 3.2 12.8 ± 3.8
HLA-DR 17.4 ± 2.4 19.9 ± 2.2 13.9 ± 4.4 14.4 ± 2.5 16.7 ± 2.8 13.2 ± 4.5
Notes: TC – tumor cells, PBL — peripheral blood lymphocytes, LAK – IL-2
activated lymphocytes.
The study of antitumor action of PBL from the
patients with melanoma has demonstrated that the
highest effect was observed against tumor cells ex-
pressing the highest level of MHC of class І antigens
(Table 2).
Table 2. Expression of MHC class І and ІІ by lymphocytes and tumor cells
of patients with melanoma
Markers Antitumor activity
(% cells) + –
PBL TC PBL TC
HLA-ABC 75.2 ± 1.3 23.8 ± 2.2 85.3 ± 2.1 15.2 ± 2.1
HLA-DR 23.0 ± 2.7 10.6 ± 4.2 13.5 ± 3.3 12.3 ± 3.7
Notes: TC – tumor cells, PBL — peripheral blood lymphocytes.
So, one may conclude that the most marked anti-
tumor action of lymphocytes of the patients with soft
tissue sarcoma or melanoma is achieved against tumor
cells expressing MHC class І antigens.
Next, we have studied the expression of CD25,
CD54, CD71, Ki-67 on tumor cells of various types
(different soft tissue sarcoma, melanoma) and on
non-acticvated and activated lymphocytes. First of
all, we have revealed that expression of the markers
on tumor cells and lymphocytes is characterized by
pronounced individual patterns.
The data have demonstrated the absence of cor-
relation between the level of antitumor activity and
expression of mentioned proteins (Table 3) that may
be possibly explained by different tumor types studied
(fibrosarcoma, rhabdomyosarcoma, liposarcoma etc).
It is known that expression of the markers may differ
even between the cell lines originated from the same
tumor [18].
Experimental Oncology 28, 231–234, 2006 (September) 233
Table 3. Expression of CD25, CD54, CD71, Ki-67 by activated (LAK) and not ac-
tivated (PBL) lymphocytes and tumor cells of patients with soft tissue sarcoma
Mar-
kers
(%
cells)
Antitumor activity
+ –
PBL LAC TC PBL LAC TC
CD25 9.1 ± 1.7 15.6 ± 2.9 12.6 ± 2.4 14.4 ± 2.6 21.6 ± 3.7 8.6 ± 2.7
CD54 6.8 ± 0.9 6.5 ± 1.2 18.3 ± 7.8 7.2 ± 1.6 7.6 ± 1.3 11.3 ± 1.1
CD71 5.6 ± 0.7 6.7 ± 1.6 27.6 ± 2.6 7.4 ± 0.7 10 ± 1.6 31.5 ± 3.7
Ki-67 12.5 ± 5.4 22.3 ± 11.8 29.3 ± 8.5 12.4 ± 1.9 17.4 ± 4.5 23.3 ± 3.3
Notes: TC – tumor cells, PBL — peripheral blood lymphocytes, LAK – IL-2
activated lymphocytes.
The study of expression patterns of CD25, CD54,
PCNA by melanoma cells and CD25, CD56, CD11b
by lymphocytes has shown that the highest antitumor
action of lymphocytes is associated with the highest
expression of CD11b. In some cases upon the absence
of antitumor activity, the tendency for elevated CD25
expression on tumor cells has been observed (Table 4).
These data point on importance of CD11b expression
in realization of antitumor action of lymphocytes.
Table 4. Antitumor action of tumor cells and peripheral blood lymphocytes
of patients with melanoma
Antitumor action (AA) Tumor cells, % cells PBL, % cells
PCNA CD25 CD54 CD25 CD56 CD11b
Possessing AA 19.7 ±
4.8
12.4 ±
3.9
25.5 ±
10.8
9.5 ±
1.4
10.6 ±
2.1
18.5 ±
3.4*
Not possessing AA 16.9 ±
4.6
15.0 ±
2.9
33.4 ±
8.7
8.1 ±
2.4
8.8 ±
1.4
8.4 ±
1.2*
Notes: *the difference between indexes for the patients of I and II groups
is statistically significant (р < 0.05).
Analyzing the obtained results, one may conclude
that for antitumor action of PBL and LAK toward sar-
coma and melanoma cells, expression of MHC class I
antigens is required not only on lymphocytes, but also
on tumor cells. So, one may suppose that in theses
cases the central role for antitumor action belongs for
cytotoxic T-lymphocytes that react on tumor antigens
presented by MHC class I antigens [19, 20]. Such state-
ment is in agreement with the data of literature eviden-
cing that altered expression of class I HLA molecules
on cells leads to significantly decreased recognition
of them by CTL [21]. It’s interesting to note also that
certain epitopes of HLA-А expressed on tumor cells of
different genesis are making them more sensitive for
immunotherapy [22].
The obtained results are evidencing that PBL
and LAK of the patients with soft tissue sarcoma and
melanoma are showing the highest antitumor activity
toward tumor cells with elevated expression level of
MHC class I antigens. Expression levels of CD25, CD71,
Ki-67, CD54, CD56, CD11b, PCNA (detected by MoAb
IPO-38) are characterized by significant individual
variations that are possibly caused by disregulation of
their expression on the level of genome. Along with the
absence of statistically significant correlation between
expression of different markers and antitumor action of
lymphocytes and LAK toward sarcoma cells, the strict
correlation between CD11b expression on lymphocytes
of patients with melanoma and their antitumor action
has been revealed. According to our data, the respective
expression level of MHC class I antigens is promoting
the sensitivity of tumor cells to action of LAK.
Acknowledgement
The work was supported by the Programme of Na-
tional Academy of Sciences of Ukraine «Peculiarities of
functioning of oncogenome» (№ 0102U003228).
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ПротивооПухолевое действие
лимфокинактивированных лимфоцитов больных
саркомами мягких тканей и меланомой в зависимости
от эксПрессии антигенов І и ІІ класса главного
комПлекса гистосовместимости
Цель: изучить экспрессию антигенов І и ІІ класса главного комплекса гистосовместимости (ГКГ) на лимфоцитах и опухолевых
клетках (саркомы мягких тканей и меланома кожи) и противоопухолевое действие лимфоцитов, активированных и
неактивированных ИЛ-2 параллельно с экспрессией некоторых рецепторов, характеризующих протеом. Материалы и методы:
культивирование эксплантатов опухоли и аутологичных лимфоцитов в диффузионных камерах с дальнейшим изучением
противоопухолевого действия лимфоцитов на основании морфологических особенностей роста эксплантатов. Экспрессию
антигенов CD25, CD71, Ki-67, CD54, CD56, CD11b, ядерного антигена пролиферирующих клеток (ИПО-38) определяли
методом непрямой флуоресценции с помощью соответствующих моноклональных антител. Результаты: наиболее выраженное
противоопухолевое действие лимфоцитов как больных саркомами мягких тканей, так и меланомой проявляется по отношению
к тем опухолевым клеткам, которые экспрессируют антигены I класса ГКГ. Установлено, что значение экспрессии указанных
структур для противоопухолевого действия зависит от биологических особенностей опухоли: зависимости между уровнем
противоопухолевой активности и экспрессией изученных рецепторов клетками больных саркомой не выявлено. В то же время
наиболее выраженное противоопухолевое действие лимфоцитов больных меланомой сочеталось с высоким уровнем экспрессии ими
CD11b. Выводы: установлена прямая зависимость чувствительности опухолевых клеток к действию лимфокинактивированных
клеток от уровня экспрессии антигенов ГКГ I класса на клетках как меланомы, так и сарком.
Ключевые слова: антигены І и ІІ классов ГКГ, ЛАК, саркоми мягких тканей, меланома.
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