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Цель. Изучить морфологические и молекулярные особенности метастазов аденокарциномы толстой кишки в печень. Материал и методы. Изучено состояние генов репарации неспаренных нуклеотидов ДНК (MMR), экспрессия CXCR4, пролиферативная активность по индексу Ki-67 в 125 наблюдениях аденокарциномы толстой кишки с метастазами в печень. Первая группа составлена из 94 наблюдений опухоли с метастазами в печень на момент постановки диагноза, 2-я группа - из 31 наблюдения со II стадией заболевания на момент постановки диагноза, однако в дальнейшем у этих пациентов развились метастазы. Во 2-й группе исследована KRAS-мутация. В группу контроля включили 22 наблюдения аденокарциномы толстой кишки II стадии без прогрессирования заболевания. В 325 наблюдениях аденокарциномы толстой кишки с неизвестной стадией исследовали состояние MMR (3-я группа). Результаты. В 1-й и 2-й группах нарушения MMR (dMMR) выявлено не было. Частота dMMR в общей популяции аденокарциномы толстой кишки составила 8%. Низкий уровень CXCR4 в 1-й и 2-й группах выявлен в 16% наблюдений, в контрольной группе - в 73%. Низкий индекс Ki-67 был выявлен в 5% наблюдений метастазов в печень (1-я и 2-я группы), частота KRAS-мутации составила 45% (2-я группа). Заключение. Аденокарцинома толстой кишки с метастазами в печень характеризуется агрессивным иммунофенотипом: высокими показателями экспрессии CXCR4, Ki-67 и преимущественно сохранной функцией MMR.
Ключевые слова:
толстая кишка, печень, аденокарцинома, KRAS, MMR, MSH6, CXCR4, Ki-67, colon, liver, adenocarcinoma, KRAS, MMR, MSH6, CXCR4, Ki-67
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Aim. To study pathological and molecular features of liver metastases of colon adenocarcinoma. Material and methods. DNA mismatch repair (MMR), CXCR4 expression, Ki-67 proliferative activity were investigated in 125 cases of colon adenocarcinoma with liver metastases. First group consisted of 94 cases of tumor with liver metastases at diagnosis. The second group consisted of 31 cases with stage II disease at diagnosis, but subsequently these patient metastases. In second group KRAS mutation was investigated. The control group included 22 cases of stage II colon adenocarcinoma without disease progression. MMR was studied in 325 cases of colon adenocarcinoma without known stage. Results. MMR deficiency (dMMR) didn’t revealed in group 1 and 2. The frequency of deficiency MMR in the general population of colon adenocarcinoma was 8%. Low level of expression of CXCR4 in group I and II was revealed in 16% of cases, in control group - in 73%. Low level of Ki-67 was revealed in 5% of cases of liver metastases (group 1 and 2), the frequency of KRAS mutations was 45%. Conclusion. Colon adenocarcinoma with liver metastases is characterized by aggressive immunophenotype: high expression rates CXCR4, Ki-67, and preferentially retained MMR function.
Keywords:
толстая кишка, печень, аденокарцинома, KRAS, MMR, MSH6, CXCR4, Ki-67, colon, liver, adenocarcinoma, KRAS, MMR, MSH6, CXCR4, Ki-67