RESUMO
Analysis of HER2 status of the tumor and expression of mTOR, AMPK showed a decrease in mTOR mRNA level in HER2+ tumors in comparison with HER- status. The appearance of PD-L1+ transformed cells in the tumor was associated with increased expression of the LC3B gene and elevated content of the corresponding protein measured after treatment.
Assuntos
Adenocarcinoma , Proteínas Associadas aos Microtúbulos , Neoplasias Gástricas , Proteínas Quinases Ativadas por AMP/genética , Proteínas Quinases Ativadas por AMP/metabolismo , Adenocarcinoma/diagnóstico , Adenocarcinoma/tratamento farmacológico , Adenocarcinoma/genética , Adenocarcinoma/metabolismo , Antineoplásicos/uso terapêutico , Antígeno B7-H1/genética , Antígeno B7-H1/metabolismo , Biomarcadores Farmacológicos/metabolismo , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Regulação Neoplásica da Expressão Gênica , Humanos , Proteínas Associadas aos Microtúbulos/genética , Proteínas Associadas aos Microtúbulos/metabolismo , Prognóstico , Receptor ErbB-2/genética , Receptor ErbB-2/metabolismo , Neoplasias Gástricas/diagnóstico , Neoplasias Gástricas/tratamento farmacológico , Neoplasias Gástricas/genética , Neoplasias Gástricas/metabolismo , Serina-Treonina Quinases TOR/genética , Serina-Treonina Quinases TOR/metabolismo , Resultado do TratamentoRESUMO
The problem of retroperitoneal neoplasm management is still relevant despite certain achievements in diagnosis, anesthetic care and surgical techniques. These patients often admit to specialized hospitals with a widespread malignant process and/or complications due to no specific symptoms. Resection is preferred for malignant inorganic retroperitoneal tumors. A feature of these neoplasms is frequent local relapses, which seriously limit the possibility of redo surgery. The authors report successful surgical treatment of recurrent malignant inorganic retroperitoneal myxolipoma with giant baseline dimensions.
Assuntos
Recidiva Local de Neoplasia , Neoplasias Retroperitoneais , Humanos , Recidiva Local de Neoplasia/diagnóstico , Recidiva Local de Neoplasia/cirurgia , Neoplasias Retroperitoneais/diagnóstico , Neoplasias Retroperitoneais/cirurgia , Estudos RetrospectivosRESUMO
The peculiarities of gastric cancer development associated with the expression levels of components of the AKT/mTOR signaling cascade and PD, PD-L1, PD-L2 have not yet been identified. We revealed the fundamental changes in the expression AKT/mTOR and PD receptors and their ligands associated with dissemination of gastric cancer. An increase in the mRNA level of all components of this cascade was demonstrated. The expression of mTOR and AKT decreased against the background of enhanced expression of PTEN phosphatase. The increase in the expression of PD-1 receptors and PD-L1 and PD-L2 ligands was most pronounced in patients with distant metastases.
Assuntos
Antígeno B7-H1/genética , Proteína 2 Ligante de Morte Celular Programada 1/genética , Receptor de Morte Celular Programada 1/genética , Proteínas Proto-Oncogênicas c-akt/genética , Neoplasias Gástricas/genética , Serina-Treonina Quinases TOR/genética , Proteínas Adaptadoras de Transdução de Sinal/genética , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Antígeno B7-H1/metabolismo , Proteínas de Ciclo Celular/genética , Proteínas de Ciclo Celular/metabolismo , Linhagem Celular Tumoral , Progressão da Doença , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Linfonodos/metabolismo , Linfonodos/patologia , Metástase Linfática , Masculino , Estadiamento de Neoplasias , PTEN Fosfo-Hidrolase/genética , PTEN Fosfo-Hidrolase/metabolismo , Proteína 2 Ligante de Morte Celular Programada 1/metabolismo , Receptor de Morte Celular Programada 1/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Proteínas Proto-Oncogênicas c-raf/genética , Proteínas Proto-Oncogênicas c-raf/metabolismo , Piruvato Desidrogenase Quinase de Transferência de Acetil/genética , Piruvato Desidrogenase Quinase de Transferência de Acetil/metabolismo , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Transdução de Sinais/genética , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/patologia , Serina-Treonina Quinases TOR/metabolismoRESUMO
Chymotrypsin-like activity of proteasomes and total calpain activity were studied in patients with stage T2-4N0-3M0 gastric cancer and stage T2-4N0-2M0-1 colorectal cancer. Activities of proteasomes and calpains in gastric and colorectal cancer tissues were higher than in the corresponding normal tissues. Changes in activities of proteasomes and calpains were mutually related. The appearance of lymphogenic metastases in gastric cancer was associated with the increase in calpain activity. The progress of colorectal cancer and development of lymphogenic and hematogenic metastases were associated with elevated chymotrypsin-like activity of proteasomes.
