Nataliya Babyshkina

Colorectal cancer has been one of the leading malignant neoplasms in males and females over many years. The vast majority of patients (70%) with colon lesions develop distant metastases to the liver, which are the main cause of death.

Whole exome sequencing of peripheral blood samples from Tuvan females diagnosed with breast and ovarian cancers (BC/OC) was performed to search for new genes involved in BC/OC pathogenesis. Considering the high cost of whole exome sequencing and study material requirements, 9 samples were selected from 61 genomic DNA samples. A mutation in the LGR4...

Background. Colorectal cancer is one of the most common cancers and the second leading cause of cancer-related deaths worldwide. Population-based studies have shown that 25–30 % of patients with colorectal cancer have synchronous liver metastases at the time of diagnosis. despite modern advances in oncology and surgery, only 25 % of patients with m...

Immunotherapy has become an integral part of a comprehensive treatment approach to metastatic colorectal cancer (mCRC). Nivolumab (Opdivo) is a human immunoglobulin G4 monoclonal antibody that blocks the interaction between the programmed cell death 1 (PD-1) receptor and its ligands 1/2 (PD-L1/PD-L2), leading to inhibition of T-cell proliferation,...

Introduction. Luminal breast cancer (BC) occupies the largest proportion in the structure of the entire molecular landscape of this disease. During the ongoing treatment, most often hormone therapy, in part of patients, the disease progression develops, which makes necessary the search for new molecular predictors. Aim of the research. To study the...

Aim : to analyze outcomes of multimodal treatment including preoperative chemotherapy with FOLFOX 4 regimen in patients with upper rectal cancer. Patients and Methods : the pilot study included 24 patients. Stages II and III were confirmed in 2 (8.3%) and 22 (91.7%) patients, respectively. All patients underwent 3 cycles of chemotherapy in FOLFOX 4...

Growth factors signaling cascades and their interaction with the central regulatory targets of tumor cells and estrogens are considered as the main mechanisms of hormonal resistance in breast cancer. The integration of the transforming growth factor β1 (TGF-β1) and PI3K (phosphoinositide 3-kinase)/Akt (protein kinase B)/mTOR (mammalian target of ra...

Metastatic colon cancer (mCC) is a heterogeneous disease, which significantly complicates its prognosis and the choice of an effective treatment strategy for patients. The use of mСС molecular profiling data will allow identifying an optimal approach to justify the choice of therapy and increase the patient’s survival rates.

The purpose of the study was to assess the risk of developing local recurrence in patients with locally advanced breast cancer, taking into account unfavorable prognostic factors, and to determine the indications for adjuvant neutron therapy. Material and Methods . The treatment outcomes in 155 patients with stage T2–4N0–3M0 locally advanced breast...

Background . Colorectal cancer (CRC) is one of the most common cancers and one of the most leading causes of cancer-related deaths worldwide. Approximately 35 % of CRC patients have liver metastases at the time of diagnosis. These patients have a poor prognosis, with the 5-year survival rate of 15 %. Given the poor survival with currently approved...

Triple-negative breast cancer (TNBC) is characterized by high invasiveness, high metastatic potential, proneness to relapse, and poor prognosis. Currently, four subtypes in the classification of triple-negative breast cancer (TNBC) are distinguished, which differ from each other in morphological manifestations, molecular genetic features, survival...

The aim: to study the expression status of ERα, TGF-βR2, pAkt to assess the breast cancer progression when prescribing drug therapy with tamoxifen. ESR1 gene expression level, TGF-βR2 and pAkt protein expression as well as the populations of pAkt–/TGFβR2+ cells were identified as additional molecular genetic markers for the prognosis of estrogen-po...

The purpose of the study was to assess the short-term effcacy and tolerability of neoadjuvant chemotherapy (NAC) in colorectal cancer (CRC) patients with isolated liver metastasis. Material and Methods . Since 2020, a pilot study including 23 CRC patients with liver metastasis has been conducted at the Abdominal Cancer Department of the Cancer Rese...

Changes in the activity of growth factors and their receptors play a key role in shaping the response to treatment with anticancer hormonal drugs. The aim of this work was to study the relationship between the TGFβ1 and TGFβR1 expression and the progression of breast cancer (BC) during tamoxifen therapy.

Aim of the study: a systematic analysis of the modern literature data on the nivolumab monotherapy efficacy in patients with metastatic colorectal cancer (mCRC). Material and methods. The review summarizes the results of clinical studies of the nivolumab efficacy in patients with mCRC between 2012 and 2022. The current approaches to assessing the t...

The purpose of the study was to generalize information regarding the molecular and biological mechanisms involved in the resistance to endocrine therapy with aromatase inhibitors in patients with luminal breast cancer. Material and Methods. The literature search was conducted using Medline, Cochrane Library, Elibrary and PubMed databases. Results....

Background: Germline alterations in BRCA1, BRCA2, and other genes are responsible for early-onset breast cancer. However, up to 20% of molecular tests report genetic variant of unknown significance (VUS) or novel variants that have never been previously described and their clinical significance are unknown. This study aimed to reclassify variant o...

Background. The identification of the ethnospecific mutations associated with hereditary breast cancer remains challenging. Next generation sequencing (Ngs) technology fully enables the compilation of germline variants associated with the risk for inherited diseases. Despite the success of the Ngs, up to 20 % of molecular tests report genetic varia...

The transforming growth factor beta (TGF-β) signaling pathway plays complex role in the regulation of cell proliferation, apoptosis and differentiation in breast cancer. TGF-β activation can lead to multiple cellular responses mediating the drug resistance evolution, including the resistance to antiestrogens. Tamoxifen is the most commonly prescrib...

The PI3K/Akt/mTOR is a key signaling system that binds oncogenes and various receptors to many cell functions, promotes estrogen resistance, and is the most frequently activated signaling pathway in malignant neoplasm, including breast cancer (BC). About 70 % of BC is hormone‑receptor positive and the endocrine therapy is the main component of trea...

Hormone-receptor positive breast cancer is the most common molecular subtype and represents 60–75 % of all breast cancers (BC). The presence of specific molecular targets such as the estrogen/progesterone receptor determines the use of hormone therapy for patients with this subtype. Tamoxifen, a selective estrogen receptor modulator, remains the fi...

In accordance with the Asian BRCA Consortium data, there is a significant difference in incidence rate of breast cancer depending on age, as well as spectrum and prevalence of BRCA1/2 mutations between Mongoloid (East Asian) and Caucasoid (European) people. However, European strategies to identify familial BC are still applied to the Asian populati...

Background. Identification of predictive molecular markers of triple-negative breast cancer (TNBC) will enable the evaluation of the efficacy of neoadjuvant chemotherapy (NACT) and define optimum approaches for the prognosis of the disease course in TNBC patients.The aim of the study was to examine the correlation between the expression of the epid...

The luminal-A-like and luminal-B-like breast cancer groups have distinct biological features that lead to differences in the treatment response and clinical outcome. The aim of this study was to examine the value of the distribution pattern of ERα expression, ESR1 SNPs as well as ESR1 mRNA expression in predicting tamoxifen response and survival in...

Background. It is generally accepted that crosstalk between the growth factor receptor and ER pathways implicated in tamoxifen resistance. The aim of the study was to examine the relationship between mRNA level, protein expression and gene polymorphism of the EGFR/PI3K/AKT signaling components with tamoxifen efficacy in patients with estrogen-depen...

The identification of informative biomarkers that could predict the treatment response is particularly important in the triple-negative (TN) breast cancer, which is characterized by biological diversity. The aim of this study was to investigate the impact of vascular endothelial growth factor receptor (VEGFR2) expression and its gene polymorphisms...

A crosstalk between the estrogen receptor alpha (ERα) and tyrosine kinase receptors contribute to endocrine resistance. We investigated the effect of the four Smad-independent TGF-β signaling components and the distribution pattern of ERα expression on the response to adjuvant tamoxifen treatment in 122 estrogen positive breast cancer patients. We...

Identification of additional biomarkers associated with ER genomic and nongenomic pathways could be very useful to distinguish patients who will benefit from tamoxifen treatment. The aim of this study was to analyze the prognostic significance of the distribution pattern of ERα expression, ESR1 gene single-nucleotide polymorphisms and expression le...

Introduction. The crosstalk between the estrogen and growth factor receptors signaling may play an important role in the resistance to endocrine therapy. The aim of the study was to examine the relationship between the protein and receptor gene expression of transforming growth factor β type I (TGF-βRI) and its polymorphism with progression of lumi...

Introduction. The crosstalk between the estrogen and growth factor receptors signaling may play an important role in the resistance to endocrine therapy. The aim of the study was to examine the relationship between the protein and receptor gene expression of transforming growth factor β type I (TGF-βRI) and its polymorphism with progression of lumi...

The identification of informative biomarkers that are able to predict prognosis and treatment response may be particularly important in triple negative breast cancer.The aim of the study was to investigate the relationship between vascular endothelial growth factor receptor VEGFR-2 expression and KDR gene polymorphisms with the efficacy of neoadjuv...

Background. The crosstalk between estrogen receptor alpha (ERα) and growth factor receptors is an essential part of tamoxifen resistance and the vascular endothelial growth factor/ tyrosine kinase domain receptor (VEGF/KDR) signaling pathway is clinically significant in the mechanisms of this resistance. The aim of the present study was to analyze...

Tamoxifen, a selective estrogen receptor modulator, remains a standard of endocrine therapy for estrogen receptor alpha (ERα) positive breast cancer (Goldhirsch et al., 2013). Despite well-known advantages of tamoxifen treatment, approximately one third of patients experience a relapse or disease progression due to tamoxifen resistance (Osborne et...

Background. Resistance to tamoxifen remains a major clinical challenge in the treatment of breast cancer. The aim of this study was to evaluate the influence of the intensity and the pattern of estrogen receptor α (ERα) expression and common single nucleotide polymorphisms (SNP) in the estrogen receptor 1 gene (ESR1, rs2228480:2014G>A; rs2077647:+3...

The aim of this retrospective study was to evaluate the objective clinical response (cOR), pathological complete response (pCR), and progression-free survival (PFS) in 231 Russian patients with four subtypes of breast cancer treated with neoadjuvant chemotherapy. About 130 (56.3 %) patients received anthracycline-based, 56 (24.2 %) capecitabine-con...

We have examined the effect of betaleukin on the immune parameters in breast cancer (BC) patients treated with cytostatic drug and surgery. Intravenous application of betaleukin for 5 days just before adjuvant chemotherapy have been shown to prevent both the decrease of blood immune cell count and the damage of their functional activity in BC patie...

This study aimed to investigate the relationship of ten single nucleotide polymorphisms (SNPs) in the MTHFR, MTR, MTRR, DHFR, MTHFD1, TS, RFC1 and DNMT3b genes with cancer survival, therapeutic response to neoadjuvant chemotherapy and clinicopathological characteristics in 300 pre- and postmenopausal breast cancer patients of Russian Western Siberi...

p53 (TP53 gene) is a key tumor suppressor that balances the need for cell proliferation against the need for cancer suppression, thereby maintaining genomic integrity. Polymorphisms in the TP53 gene significantly modify p53 functionality, thereby affecting the mechanisms of cancer prevention. Despite the substantial progress in molecular genetics a...

s: AACR-NCI-EORTC International Conference: Molecular Targets and Cancer Therapeutics--Nov 12-16, 2011; San Francisco, CA Background: Breast cancer is a heterogeneous disease, comprising several molecular subtypes with diverse biological behavior, clinical presentations and responses to therapy. Given the important role that folate plays in the av...

To evaluate the potential for gene-gene interaction effects in sporadic breast cancer (BC) risk, we studied combinations of the fibroblast growth factor receptor 2 (FGFR2) rs1219648 and tumor protein 53 (TP53) rs1042522, rs1625895, and rs17878362 polymorphisms in BC patients (n=388) and healthy persons (n=275). In addition to a single-locus effect...

Transforming growth factor β1 (TGF-β1) is a multifunctional cytokine that plays an important role in human mammary carcinogenesis. The purpose of this study was to investigate the association between -509C>T single nucleotide polymorphism (SNP) of the TGF-β1 gene and infiltrating ductal breast carcinoma risk in Russian patients of Western Siberian...

This study involved 525 breast cancer (BC) patients of T2-4N0-2M0 stages at the age of 35 years and older. Significant differences in clinical and pathological characteristics between premenopausal and postmenopausal BC patients were found. Mostly marked differences were shown for positive lymph node correlation with distant metastasis, multicentri...