Articles Related to immunotherapy

Immune-checkpoint inhibitors (ICI) have provided groundbreaking advancements for a variety of malignancies. It has been of recent interest to identify predictive indicators of response to improve cancer management using immunotherapy. The intestinal microbiome has been recognized as a potential predictor of ICI anti- tumor activity. Antibiotics reduce diversity the overall composition of the gut microbiota, with effects seen as quickly as in a single day. Post-antibiotic dysbiosis recovery varies depending on type and duration of exposure. Preclinical studies in mice with advanced cancer treated with broad spectrum antibiotics have been associated with resistance to ICI treatment.

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Recombinant tumor necrosis factor -thymosin alpha 1 (TNF-T) has been used in Russian oncological practice for a number of years.

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Nonspecific chronic vulvovaginites (NCVV) are a frequent clinical sign of immune deficiency, especially in young girls. The established problems with the functioning of various parts of the immune system (IS) in this pathology dictate the need to include immunomodulatory therapy into the complex. The developed program of combined immunotherapy for immunocompromised girls allows reducing the severity and duration of exacerbation of NCVV, their frequency against the background of a significant reduction in ARVI incidence. Positive clinical effects were observed with underlying restoration in IS functioning. A protective effect was obtained (observation in a catamnesis for 1 year): the duration of a clinically safe period increased from 6 to 11-11.5 months per year.

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Current cancer treatments by immune checkpoint blockades are limited due to severe adverse events caused by alteration of the immune system required for homeostasis of normal tissues. Common cancer chemotherapy alters the quality of patients’ lives. Platinum-based treatment can lead to severe neurotoxicity with chronic debilitation. Additionally, survival of patients with epithelial ovarian cancers (EOCs) has remained poor despite extensive cytoreductive surgery, high dose chemotherapy, checkpoint blockades and immunotherapies effective in some other types of cancer. The pathobiology of EOC cancer stem cells (CSCs) is not well understood. Observations demonstrate that EOCs exhibit in vivo two distinct CSC types - perivascular diploid CSCs dividing asymmetrically with the help of the host suicidal CD8+ T cells, and haploid CSCs at the cancer abdominal surface originating from meiosis I cytokinesis of bulk surface cancer cells. The perivascular CSCs contribute to the cancer cell bulk and, via left ovary venous blood, can cause EOC liver metastases. Haploid CSCs released from the bulk cancer surface cause the common pelvic and abdominal EOC spread. Former elimination of the host antibodies blocking T cell effectors by intermittent doses of cyclophosphamide exhibiting significant immunomodulatory anticancer effects, facilitation of the immune system reactivity against alloantigens of cancer cells by blood transfusions, and augmentation of anticancer immunity by bacterial toxins, resulted during the subsequent treatment-free period into rejection of inoperable EOCs without any adverse events during the treatnment. To help prevent cancer relapses, patients treated for advanced primary epithelial cancers should be considered as candidates for continuously stimulating immune anticancer activity by treatments such as daily metformin and weekly lentinan consumptions.

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Many scientists and biotechnology companies had given up on the idea of cancer immunotherapy in 1990s. Almost a decade after first detection of T cell suppression effect of CTLA4 the identity of its antibody was established. While they are found effective in many cancers including melanoma, lung cancer etc. immune checkpoint inhibitors have lent an important measure to manage recurrent and refractory ovarian cancer. This subject needs constant updating specially for students of ovarian cancer who are looking at this avenue of cure with much hope.

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A monoclonal antibody (Mab) designated as GHR106 was generated against the extracellular domain (N1-29 synthetic peptide) of human gonadotropin releasing hormone (GnRH) receptor. It is a first-in-class GnRH analog and can serve as a drug candidate for potential applications in the treatment of human cancers and/or fertility regulations.

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