THE BRAF MUTATION V600E IN PAPILLARY THYROID CANCER, CLINICAL-MORPHOLOGICALPARALLELES AND PROGNOSIS


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On the material of the 67 cases of papillary thyroid cancer (PTC) authors executed the study of the interrelationship between the BRAF mutation V600E and the forecast, biomolecular and morphological characteristics of the disease. There was implemented the analysis of samples for the presence of 7 KRAS gene mutations, 4 mutations of the PIK3CA gene, mutation BRAF V600E with the revealing of the interrelationship between such biomolecular markers for proliferation and apoptosis as Ki-67, p53, Bcl2. Also there was performed chromogenic hybridization (CISH method) in situ to study the status of the HER2 gene. There was determined the interrelationship between BRAF mutation V600E and clinical indices of prognosis: tumor sizes, capsule invasion, presence of metastases in regional lymph nodes. In addition, there was evaluated the interrelationship between BRAF mutation V600E and 10-years survival rate. No mutation were identified in KRAS, PI3K genes. BRAF mutation V600E was identified in 50 cases (75%). The frequency of V600E in women accounted of 75 ± 6.4%, in men - 67 ± 27.1%. In patients with the presence of V600E the size of a node was slightly less than in the absence of mutations and in 76% of cases did not reach the average value of 1.8 cm. Invasion into the capsule was identified in 35 ± 12.7% cases with a positive BRAF mutation V600E status and in 56 ± 8.4% - in cases with a negative status. Metastases in regional lymph nodes occurred in 36 ± 11.6% in patients with V600E and in 47 ± 18.9% of cases without this mutation. There was obtained the interrelationship between V600E and Ki-67: the average level of the proliferative activity in the presence of the given mutation was 4.4 ± 0.6%, in the absence - 9.4 ± 3.9%. No interrelationship was obtained between V600E and other biomolecular parameters or this interrelationship was tendentious in character. In terms of 10-years survival the groups with or without V600E statistically did not differ. Based on the data, it was possible to say about the absence of the negative impact of V600E on the prognosis in PTC patients

作者简介

A. Ivanov

Altaysky branch of the N.N. Blokhin Russian Cancer Research Center

Email: Anatolij0199@yandex.ru
научный сотрудник лаборатории исследований молекулярно-генетических характеристик опухолей Barnaul, 656049, Russian Federation

A. Avdalyan

Altaysky branch of the N.N. Blokhin Russian Cancer Research Center

Barnaul, 656049, Russian Federation

V. Gerval’d

Altaysky branch of the N.N. Blokhin Russian Cancer Research Center; Altai State Medical University

Barnaul, 656049, Russian Federation; Barnaul, 656038, Russian Federation

E. Lushnikova

Institute of Molecular Pathology and Pathomorphology

Novosibirsk, 630117, Russian Federation

Yu. Zorkina

Altai Oncological Center

Barnaul, 656043, Russian Federation

N. Kruglova

Altaysky branch of the N.N. Blokhin Russian Cancer Research Center

Barnaul, 656049, Russian Federation

A. Lazarev

Altaysky branch of the N.N. Blokhin Russian Cancer Research Center

Barnaul, 656049, Russian Federation

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