[The expression of antigens, detectable with ICO-series monoclonal antibodies, on the surfaces of cells forming granulocyte and macrophage colonies in semiliquid agar]. / Ekspressiia antigenov, vyiavliaemykh monoklonal'nymi antitelami serii IKO, na poverkhnosti kletok, obrazuiushchikh granulotsitarnye i makrofagal'nye kolonii v poluzhidkom agare.

The expression of antigens on granulocyte-macrophagal colony-forming cells of patients with nonhematological diseases was studied. Treatment of bone marrow cells with murine monoclonal antibodies ICO-1 and ICO-11 led to statistically significant inhibition of the number of growing colonies. Monoclonal antibodies ICO-02, ICO-10, ICO-GM-1 and ICO-G-2 had no such effect.

[Block of NK cell activity by ICO-11 monoclonal antibodies]. / Blokada EK-kletochnoi aktivnosti monoklonal'nymi antitelami IKO-11.

Antigen expression determined by ICO-11 monoclonal antibodies was studied on leukemia cells from bone marrow, blood cells from patients with lymphoproliferative diseases and natural killer (NK) cells responsible for natural resistance. ICO-11 monoclonal antibodies were shown to recognize the antigen expressed on NK-cells, predecessors of T-cells (thymocytes), myelomonocytes (myeloblasts, monoblasts) and to block NK-cell activity.

[IKO-GM-1 monoclonal antibodies in the diagnosis of acute nonlymphoblastic leukemias]. / Monoklonal'nye antitela IKO-GM-1 v diagnostike ostrykh nelimfoblastnykh leikozov.

The paper deals with the analysis of the phenotype of blastic cells obtained from patients suffering various subtypes (FAB-classification) of acute nonlymphoblastic leukemia. The study used monoclonal IKO-GM-1 antibodies complementary to an antigen common to myeloid and macrophagal cells. Also, previously described monoclonal IKO-11, IKO-1, IKO-02 and IKO-10 antibodies were employed. Application of the above antibodies appeared to provide information necessary for differentiating between myeloblastic and monoblastic leukemia. Complex immunologic and cytochemical investigations are required for identifying leukemia subtypes.

[Immunophenotype of lymphocytes of patients with malignant melanoma and its dynamics during immunotherapy with interleukin-2]. / Immunologicheskii fenotip limfotsitov bol'nykh so zlokachestvennoi melanomoi i ego dinamika v protsesse immunoterapii interleikinom-2.

A Mab set was used to study immunological phenotype of lymphocytes of five patients bearing stage IV malignant melanoma and its changes developing in the course of interleukin-2 (Euro cetus) immunotherapy. Patients were shown to have lowered counts of T cells (mainly due to T-helper/inducers), B cells and lymphocytes expressing adhesion and activation molecules as well as abnormal immunoregulatory cell ratio. Two patients receiving interleukin-2 achieved a response. Follow-up of antigen expression revealed a rise in natural killer and immunoregulatory T lymphocyte levels in the responders whereas activation antigens and B cell levels were increased in all the patients.

[Estradiol-17beta, sex steroid-binding globulin and the cellular and humoral immunity indices in young women with breast cancer]. / Estradiol-17beta, polovye steroidy sviazyvaiushchii globulin i nekotorye pokazateli kletochnogo i gumoral'nogo immuniteta u molodykh zhenshchin, bol'nykh rakom molochnoi zhelezy.

Blood serum levels of sex steroid-binding globulin (SSBG), free and SSBG- and albumin-binding fractions of estradiol-17 beta as well as some indexes of cellular and humoral immunity were compared in 25 young female patients with stage 1-3 breast cancer and controls. No significant difference in SSBG and free estradiol-17 beta fraction as well as free estrogen index was established between patients and controls. In the patient group, a direct correlation was established between free estradiol-17 beta fraction level and that of mature T-cells expressing CD3 antigen and between SSBG level, on the one hand, and total level of T-cells (CD7 antigen) and that of T-suppressors (CD8 antigen-containing cytotoxic lymphocytes), on the other. An inverse correlation was established in the same group between SSBG level and that of B-cell markers expressing CD3 and 7 antigens and IgM mu-chain. In the follicular and lutein phases of the menstrual cycle, a difference in the degree of correlation between total estradiol-17 beta level and immunologic indexes was established between breast cancer patients and controls.

[The lymphocyte immunological phenotype of young and middle-aged breast cancer patients]. / Immunologicheskii fenotip limfotsitov u bol'nykh rakom molochnoi zhelezy molodogo i srednego vozrasta.

The immunologic phenotype of lymphocytes of young and middle-aged patients with breast cancer was identified using ICO monoclonal antibodies. The parameters were compared to that of healthy subjects of the corresponding age groups. Breast cancer patients of both age groups were shown to have lower T-cell level as compared to donors. Parameters of T-cell-mediated immunity did not differ significantly between the young and middle-aged patients, although the former group tended to have lower level of mature T-lymphocytes. A significant decrease in parameters of B-cell-mediated immunity was observed in young patients as compared to donors whereas in middle-aged patients B-lymphocyte and monocyte levels were 4 times those in donors. B-lymphocyte level in young patients tended to be lower than in middle-aged ones.

[New aspects of adoptive immunochemotherapy in disseminated forms of cancer]. / Novye aspekty adoptivnoi immunokhimioterapii rasprostranennykh form raka.

A method of autolymphochemotherapy was developed based on administration of a "therapeutic" course of chemotherapy following cytotoxic treatment of a large amount (1.5-2 l) of central lymph obtained by external drainage of the thoracic duct. Immediate results of treatment of 15 patients with advanced breast, lung (non-small-cell) and ovarian cancer with various degree of chemoresistance are presented. Marked response was observed in 14 cases. It seems justified to use the method for the treatment of locally advanced cancer.

[The combined treatment of locally disseminated pancreatic cancer using cryosurgery]. / Kombinirovannoe lechenie mestno-rasprostranennogo raka podzheludochnoi zhelezy s ispol'zovaniem kriokhirurgii.

Experimental cryodestruction of the pancreas performed in 40 dogs served as a basis for selecting the temperature regimen, exposure time and extent of treatment to be subsequently used in man. Cryodestruction and combined cryoradiotherapy were employed in 30 patients with locally advanced pancreatic cancer. The procedure proved effective as it assured alleviation of pain, improvement in performance status and an increase in survival. CA-19-9 level and T-lymphocyte count were followed. These markers may be used to predict progression of pancreatic cancer.

[Monoclonal antibodies against the alpha-chain of human lymphocyte function-associated antigen-1]. / Monoklonal'nye antitela protiv al'fa-tsepi chelovecheskogo limfotsitarnogo funktsional'no-assotsiirovannogo antigena-(LFA-1).

The goal of the investigation was to further characterize ICO-II monoclonal antibodies. ICO-II have been shown to block NK activity of mononuclear cells from the blood of healthy donors against K-562 and Molt-4 target cells, cytotoxic T lymphocytes induced in a 7-day mixed lymphocyte culture, the reaction of lymphocyte blast cell transformation to phytohemagglutinin and the formation of En-rosettes. The molecular weight of the antigen detected by ICO-II is 180 KD. ICO-II are shown to detect alpha-subunit of human lymphocyte function-associated antigen-I (LFA-I).

[Study of the participation of the alpha-chain of the LFA-1 antigen in the phenomenon of lymphocyte adherence inhibition using ICO-11 monoclonal antibodies in vitro]. / Izuchenie uchastiia al'fa-tsepi LFA-1-antigena v fenomene ingibitsii adgezii limfotsitov s pomoshch'iu monoklonal'nykh antitel IKO-11 in vitro.

The influence of monoclonal antibodies (Mabs) ICO-11 on the ability of lymphocytes from breast cancer patients to react in lymphocyte adherence inhibition (LAI) test has been studied in vitro. It has been demonstrated that Mabs ICO-11 in the dilutions 1/4 and higher blocked the reaction to tumor extracts in LAI-test, without affecting the reaction to the extracts of normal tissues and a spontaneous adhesion of lymphocytes of healthy donors as well. The addition of the control supernatants of myeloma cells X63.Ag8. 653 to the test-system in the same dilutions caused no influence upon LAI-reaction and spontaneous adhesion of lymphocytes from healthy donors. A possible participation of alpha-chains of function-associated antigens in the binding of tumor-associated antigens to T-cells in the inductive phase of the reaction of lymphocyte adherence inhibition in vitro has been suggested.