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1.
Cancers (Basel) ; 15(15)2023 Aug 03.
Artigo em Inglês | MEDLINE | ID: mdl-37568770

RESUMO

Colorectal cancer has a poor prognosis and is prone to recurrence and metastasis. DPP7, a prolyl peptidase, is reported to regulate lymphocyte quiescence. However, the correlation of DPP7 with prognosis in CRC remains unclear. With publicly available cohorts, the Wilcoxon rank-sum test and logistic regression were employed to analyze the relationship between DPP7 expression and the clinicopathological features of CRC patients. Specific pathways of differentially expressed genes were determined through biofunctional analysis and gene set enrichment analysis (GSEA). qPCR and immunohistochemical staining were used to determine DPP7 expression levels in surgical specimens. The public dataset and analysis of the biospecimens of CRC patients revealed that DPP7, in the CRC samples, was expressed significantly higher than in non-tumor tissues. Moreover, increased DPP7 was significantly associated with a higher N stage, lymphatic invasion, and shorter overall survival. Functionally, DPP7 is involved in neuroactive ligand-receptor interaction and olfactory transduction signaling. We identified a series of targeted drugs and small-molecule drugs with responses to DPP7. To conclude, DPP7 is a valuable diagnostic and prognostic biomarker for CRC and considered as a new therapeutic target.

2.
Exp Ther Med ; 26(1): 352, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37324517

RESUMO

Immunotherapy and antiangiogenic therapy have shown promising clinical activity in patients with advanced biliary tract cancer (BTC) in clinical trials. As the combination of these two treatments for BTC is not well studied in the real world, the present study retrospectively analyzed the clinical outcomes of patients with unresectable BTC who received immunotherapy-antiangiogenesis combination therapy in a real-world setting. A three-center, retrospective study was performed on patients with unresectable BTC who received a combination of programmed death 1 inhibitor and antiangiogenic agent between March 26, 2019 and November 1, 2021 in China. In total, 68 patients were enrolled in the cohort. The objective response rate and disease control rate were 13.2 and 75.0%, respectively. The median time to progression, progression-free survival and overall survival were 8.2, 5.5 and 10.7 months, respectively. Adverse events of all grades occurred in 58 patients (85.3%). In conclusion, the present study demonstrated that immunotherapy-antiangiogenesis combination therapy may be considered a therapeutic option for patients with unresectable BTC. Further prospective investigations are needed.

3.
Front Genet ; 14: 1085549, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36741314

RESUMO

Background: Cancer of unknown primary (CUP) is a class of metastatic malignant tumors whose primary location cannot be determined. The diagnosis and treatment of CUP are a considerable challenge for clinicians. Herein, we report a CUP case whose corresponding primary tumor sites were successfully identified, and the patient received proper treatment. Case report: In February 2022, a 74-year-old woman was admitted to the Medical Oncology Department at Sir Run Run Shaw Hospital for new lung and intestinal tumors after more than 9 years of breast cancer surgery. After laparoscopically assisted right hemicolectomy, pathology revealed mucinous adenocarcinoma; the pathological stage was pT2N0M0. Results from needle biopsies of lung masses suggested poorly differentiated cancer, ER (-), PR (-), and HER2 (-), which combined with the clinical history, did not rule out metastatic breast cancer. A surgical pathology sample was needed to determine the origin of the tumor tissue, but the patient's chest structure showed no indications for surgery. Analysis of the tumor's traceable gene expression profile prompted breast cancer, and analysis of next-generation amplification sequencing (NGS) did not obtain a potential drug target. We developed a treatment plan based on comprehensive immunohistochemistry, a gene expression profile, and NGS analysis. The treatment plan was formulated using paclitaxel albumin and capecitabine in combination with radiotherapy. The efficacy evaluation was the partial response (PR) after four cycles of chemotherapy and two cycles combined with radiotherapy. Conclusion: This case highlighted the importance of identifying accurate primary tumor location for patients to benefit from treatment, which will provide a reference for the treatment decisions of CUP tumors in the future.

4.
Int J Biol Sci ; 18(15): 5653-5666, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36263186

RESUMO

Studies have shown that epigenetic enzymes such as histone deacetylase (HDAC) are closely related to cancers and that several HDAC inhibitors exert antitumor effects. Studies have further suggested that class IIa HDAC inhibitors are related to immune functions, including immune responses and the expression of chemokines and complement pathway components. TMP195, a selective class IIa HDAC inhibitor, has been reported to be effective against breast cancer. However, the role and mechanism of TMP195 in colorectal cancer remain unknown. In this study, we found that TMP195 significantly reduced the tumor burden in two mouse models of colitis-associated colorectal cancer (CAC) and subcutaneous tumor. Mechanistically, TMP195 decreased the proportion of total macrophages but increased the proportion of M1 macrophages by promoting polarization, resulting in the increased release of inflammatory cytokines. TMP195 had no direct effect on the proliferation of colorectal cancer cells, and its antitumor effect on the colorectal cancer disappeared when macrophages were partly depleted by clodronate liposomes. In addition, TMP195 enhanced the efficacy of PD-1 blockade. The present study revealed that the combination of TMP195 and PD-1 blockade may provide a therapeutic strategy for colorectal cancer.


Assuntos
Neoplasias Colorretais , Inibidores de Histona Desacetilases , Camundongos , Animais , Inibidores de Histona Desacetilases/farmacologia , Receptor de Morte Celular Programada 1/metabolismo , Ácido Clodrônico/metabolismo , Ácido Clodrônico/farmacologia , Lipossomos/metabolismo , Lipossomos/farmacologia , Macrófagos/metabolismo , Histona Desacetilases/metabolismo , Citocinas/metabolismo , Neoplasias Colorretais/metabolismo , Linhagem Celular Tumoral
5.
Cancer Med ; 11(19): 3612-3622, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35403359

RESUMO

BACKGROUND: Immunotherapy-antiangiogenesis combination therapy has achieved excellent survival outcomes in hepatocellular carcinoma (HCC) in clinical trials. However, the combination therapy for HCC outside clinical trials is not well studied, and predictive factors are lacking. Here, we retrospectively analyzed the efficacy and safety of immunotherapy-antiangiogenesis combination therapy in unresectable HCC patients in a real-world setting. METHODS: We conducted a four-center, retrospective study of unresectable HCC patients who received the combination of programmed death 1 (PD-1) inhibitor and antiangiogenic agent between April 2018 and July 2021 in China. RESULTS: In total, 136 patients were enrolled in the cohort. The objective response rate (ORR) and disease control rate (DCR) were 38.0% and 81.8%, respectively. The median time to progression (TTP), progression-free survival (PFS), and overall survival (OS) were 7.2, 7.3, and 19.6 months, respectively. The multivariate analysis indicated that ECOG performance status score (PS) 2 was a significantly independent negative factor of ORR. Moreover, ECOG PS 2, peritoneum metastasis and previous immunotherapy were found to be independent negative predictors of PFS. A shorter OS was associated with ECOG PS 2, peritoneum metastasis, the presence of previous immunotherapy, Child-Pugh stage B, and high alpha-fetoprotein (AFP) concentration. One hundred and twenty-five patients (91.9%) reported adverse events (AEs) with any grade. CONCLUSION: We elucidated the efficacy and safety of immunotherapy-antiangiogenesis combination therapy and identified potential predictors for response and survival in a real-world cohort of patients with unresectable HCC.


Assuntos
Carcinoma Hepatocelular , Neoplasias Hepáticas , Inibidores da Angiogênese/efeitos adversos , Carcinoma Hepatocelular/tratamento farmacológico , Carcinoma Hepatocelular/patologia , Humanos , Inibidores de Checkpoint Imunológico/efeitos adversos , Neoplasias Hepáticas/patologia , Receptor de Morte Celular Programada 1 , Estudos Retrospectivos , alfa-Fetoproteínas
6.
Front Immunol ; 13: 816005, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35222392

RESUMO

The crucial role of CD4+ and CD8+ T cells in shaping and controlling immune responses during immune disease and cancer development has been well established and used to achieve marked clinical benefits. CD3+CD4-CD8- double-negative (DN) T cells, although constituting a rare subset of peripheral T cells, are gaining interest for their roles in inflammation, immune disease and cancer. Herein, we comprehensively review the origin, distribution and functions of this unique T cell subgroup. First, we focused on characterizing multifunctional DN T cells in various immune responses. DN regulatory T cells have the capacity to prevent graft-versus-host disease and have therapeutic value for autoimmune disease. T helper-like DN T cells protect against or promote inflammation and virus infection depending on the specific settings and promote certain autoimmune disease. Notably, we clarified the role of DN tumor-infiltrating lymphocytes and outlined the potential for malignant proliferation of DN T cells. Finally, we reviewed the recent advances in the applications of DN T cell-based therapy for cancer. In conclusion, a better understanding of the heterogeneity and functions of DN T cells may help to develop DN T cells as a potential therapeutic tool for inflammation, immune disorders and cancer.


Assuntos
Doenças Autoimunes , Doença Enxerto-Hospedeiro , Neoplasias , Doenças Autoimunes/terapia , Antígenos CD8 , Linfócitos T CD8-Positivos , Humanos , Inflamação , Neoplasias/terapia
7.
Front Nutr ; 8: 664620, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34760907

RESUMO

Objective: We sought to investigate the prognostic significance of body composition and weight change during the first 6 months of adjuvant chemotherapy after R0 resection and develop novel nomograms to accurately predict relapse-free survival (RFS) and overall survival (OS). Methods: This retrospective study included 190 patients who underwent curative radical gastrectomy for gastric cancer and received adjuvant chemotherapy. The changes in weight and body composition including skeletal muscle index (SMI), subcutaneous adipose tissue (SAT), and visceral adipose tissue (VAT) were analyzed for 6 months. LASSO Cox regression and multivariate Cox regression were conducted to evaluate other clinical characteristics, which were used to construct a nomogram for the prediction of 3- and 5-year RFS and OS. The constructed nomogram was subjected to 1,000 resamples bootstrap for internal validation. The Concordance index (C-index) and time-dependent receiver operating characteristic (t-ROC) curves were used to evaluate and compare the discriminative abilities of the new nomograms, non-nutritional nomograms, and pTNM stage. Results: The median follow-up duration was 42.0 (25.2-55.1) months. Factors included in the newly-built nomogram for RFS were pT stage, pN stage, tumor site, tumor size, nerve invasion or not, surgery type, and change of L3SMI, while factors included in the nomogram for OS were pT stage, pN stage, tumor size, nerve invasion or not, surgery type, and change of L3SMI. The C-index and t-ROC indicated that our newly-built nomograms had greater potential to accurately predict prognosis than the non-nutritional nomograms and pTNM stage system. Besides, oral nutritional supplements can reduce the degree of weight and L3SMI loss. Conclusion: Change in skeletal muscle mass during adjuvant chemotherapy can be incorporated into predictive prognostic nomograms for RFS and OS in GC patients after radical resection. Dynamic changes in body composition and weight during adjuvant chemotherapy contribute to the early detection of poor outcomes.

8.
Int Immunopharmacol ; 89(Pt A): 107033, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33039958

RESUMO

BACKGROUND: The synergistic effects of immunotherapy and antiangiogenic therapy in advanced non-small cell lung cancer (NSCLC) have been reported in both preclinical and clinical trials. Herein, we evaluated the preliminary efficacy and safety of combined immunotherapy and antiangiogenic therapy in patients with previously treated advanced NSCLC in a real-world setting. METHODS: We conducted a 2-center, retrospective study of previously treated advanced NSCLC patients who received any anti-programmed death-1 antibody combined with antiangiogenic agent between May 2018 and March 2020. RESULTS: In total, 57 patients were included in this study, and the objective response rate and disease control rate were 19.3% and 63.2%, respectively. The median progression-free survival (PFS) was 4.2 months (95% confidence interval [CI]: 3.2-5.2 months). Bone metastases (odds ratio [OR] not available; P < .01) and ≥ 3 treatment lines (OR 6.8; 95% CI: 1.6-29.6; P < .05) were independent negative predictors of objective response. Additionally, liver metastases (hazard ratio [HR] 3.7; 95% CI: 1.6-8.5; P < 0.01), poor performance status score (PS) (HR 3.4; 95% CI: 1.6-7.5; P < 0.01) and ≥ 3 treatment lines (HR 3.5; 95% CI: 1.7-7.4; P < 0.01) were found to be negative predictors of PFS. Eighty-nine percent of the patients experienced an adverse event. CONCLUSIONS: Metastatic sites (bone and liver), ≥3 treatment lines and poor PS were potential negative predictors of the efficacy of immunotherapy combined with antiangiogenic therapy for treating NSCLC. Further investigations and randomized controlled trials are needed.


Assuntos
Inibidores da Angiogênese/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Inibidores de Checkpoint Imunológico/uso terapêutico , Imunoterapia , Neoplasias Pulmonares/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Inibidores da Angiogênese/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Carcinoma Pulmonar de Células não Pequenas/imunologia , Carcinoma Pulmonar de Células não Pequenas/secundário , China , Feminino , Humanos , Inibidores de Checkpoint Imunológico/efeitos adversos , Imunoterapia/efeitos adversos , Neoplasias Pulmonares/imunologia , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Receptor de Morte Celular Programada 1/antagonistas & inibidores , Intervalo Livre de Progressão , Estudos Retrospectivos , Medição de Risco , Fatores de Risco , Fatores de Tempo
10.
J Exp Clin Cancer Res ; 38(1): 123, 2019 Mar 11.
Artigo em Inglês | MEDLINE | ID: mdl-30857561

RESUMO

BACKGROUND: Though immune checkpoint blockade (ICB) against PD-1 has shown success in the treatment of lung cancer, not all patients respond. We have previously shown that adoptive transfer of double negative T (DNT) cells expanded from healthy donors can target leukemia but their role in treating established lung cancer is not clear. Here we explore the role of human DNT cells in targeting late-stage established lung cancer either alone or in combination with Nivolumab (anti-PD-1 antibody) and describe underlying mechanisms. METHODS: DNT cells from resected lung cancer tissue of patients were analyzed by flow cytometry to determine their infiltration and PD-1 expression. Expansion capacity and anti-tumor function of lung cancer patient and healthy donor DNT cells were compared. Late-stage lung cancer xenograft models were developed to determine the anti-tumor effect of DNT cells alone or in combination with anti-PD-1 antibody, and the level of tumor-infiltrating DNT cells was quantified by histology and characterized by flow cytometry. RESULTS: Patient-derived tumor infiltrating lymphocytes contained a lower frequency of DNT cells with a higher expression of PD-1 relative to normal lung tissue. Ex vivo expanded patient- and healthy donor-derived DNT cells showed similar levels of cytotoxicity against lung cancer cells in vitro. Healthy donor-derived DNT cells significantly inhibited the growth of late-stage lung cancer xenografts, which was further augmented by anti-PD-1 through increased DNT cell tumor infiltration. CONCLUSION: This study supports the use of DNT cells for adoptive cellular therapy against lung cancer either alone or in combination with anti-PD-1.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/terapia , Terapia Baseada em Transplante de Células e Tecidos , Imunoterapia , Receptor de Morte Celular Programada 1/imunologia , Linfócitos T/imunologia , Animais , Antígeno B7-H1/imunologia , Carcinoma Pulmonar de Células não Pequenas/imunologia , Carcinoma Pulmonar de Células não Pequenas/patologia , Modelos Animais de Doenças , Citometria de Fluxo , Humanos , Pulmão/efeitos dos fármacos , Pulmão/imunologia , Pulmão/patologia , Linfócitos do Interstício Tumoral/imunologia , Linfócitos do Interstício Tumoral/patologia , Camundongos , Nivolumabe/administração & dosagem , Receptor de Morte Celular Programada 1/antagonistas & inibidores , Linfócitos T/transplante , Ensaios Antitumorais Modelo de Xenoenxerto
11.
J Immunother Cancer ; 7(1): 17, 2019 01 22.
Artigo em Inglês | MEDLINE | ID: mdl-30670085

RESUMO

BACKGROUND: The advents of novel immunotherapies have revolutionized the treatment of cancer. Adoptive cellular therapies using chimeric antigen receptor T (CAR-T) cells have achieved remarkable clinical responses in B cell leukemia and lymphoma but the effect on solid tumors including lung cancer is limited. Here we present data on the therapeutic potential of allogeneic CD3+CD4-CD8- double negative T (DNT) cells as a new cellular therapy for the treatment of lung cancer and underlying mechanisms. METHODS: DNTs were enriched and expanded ex vivo from healthy donors and phenotyped by flow cytometry. Functionally, their cytotoxicity was determined against primary and established non-small-cell lung cancer (NSCLC) cell lines in vitro or through in vivo adoptive transfer into xenograft models. Mechanistic analysis was performed using blocking antibodies against various cell surface and soluble markers. Furthermore, the role of IL-15 on DNT function was determined. RESULTS: We demonstrated that ex vivo expanded DNTs can effectively lyse various human NSCLC cells in vitro and inhibit tumor growth in xenograft models. Expanded DNTs have a cytotoxic phenotype, as they express NKp30, NKG2D, DNAM-1, membrane TRAIL (mTRAIL), perforin and granzyme B, and secrete IFNγ and soluble TRAIL (sTRAIL). DNT-mediated cytotoxicity was dependent on a combination of tumor-expressed ligands for NKG2D, DNAM-1, NKp30 and/or receptors for TRAIL, which differ among different NSCLC cell lines. Furthermore, stimulation of DNTs with IL-15 increased expression of effector molecules on DNTs, their TRAIL production and cytotoxicity against NSCLC in vitro and in vivo. CONCLUSION: Healthy donor-derived DNTs can target NSCLC in vitro and in vivo. DNTs recognize tumors via innate receptors which can be up-regulated by IL-15. DNTs have the potential to be used as a novel adoptive cell therapy for lung cancer either alone or in combination with IL-15.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/terapia , Imunoterapia Adotiva , Interleucina-15/uso terapêutico , Neoplasias Pulmonares/terapia , Linfócitos T/transplante , Animais , Linhagem Celular Tumoral , Terapia Combinada , Humanos , Interleucina-15/farmacologia , Ligantes , Masculino , Camundongos
12.
Artigo em Inglês | MEDLINE | ID: mdl-30510778

RESUMO

Autophagy is an evolutionarily conserved catabolic process that eliminates harmful components through lysosomal degradation. In addition to its role in maintaining cellular homeostasis, autophagy is critical to pathological processes, such as inflammation and cancer. Colitis-associated colorectal cancer (CAC) is a specific type of colorectal cancer that develops from long-standing colitis in inflammatory bowel disease (IBD) patients. Accumulating evidence indicates that autophagy of microenvironmental cells plays different but vital roles during tumorigenesis and CAC development. Herein, after summarizing the recent advances in understanding the role of autophagy in regulating the tumor microenvironment during different CAC stages, we draw the following conclusions: autophagy in intestinal epithelial cells inhibits colitis and CAC initiation but promotes CAC progression; autophagy in macrophages inhibits colitis, but its function on CAC is currently unclear; autophagy in neutrophils and cancer-associated fibroblasts (CAFs) promotes both colitis and CAC; autophagy in dendritic cells (DCs) and T cells represses both colitis and CAC; autophagy in natural killer cells (NKs) inhibits colitis, but promotes CAC; and autophagy in endothelial cells plays a controversial role in colitis and CAC. Understanding the role of autophagy in specific compartments of the tumor microenvironment during different stages of CAC may provide insight into malignant transformation, tumor progression, and combination therapy strategies for CAC.

13.
SLAS Discov ; 22(1): 51-57, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27554457

RESUMO

Macrophages are highly plastic cells, which serve as sentinels of the host immune system due to their ability to recognize and respond to microbial products rapidly and dynamically. Appropriate regulation of macrophage activation is essential for pathogen clearance or preventing autoimmune diseases. However, regularly used endpoint assays for analyzing macrophage functions have the limitations of being static and non-high throughput. In this study, we introduced a real-time and convenient method based on changes in cellular impedance that are detected by microelectronic biosensors. This new method can record the time/dose-dependent cell response profiles (TCRPs) of macrophages in real time and generates physiologically relevant data. The TCRPs generated from classically interferon-γ/lipopolysaccharide-activated macrophages showed considerable consistency with the data generated from standard endpoint assays. We further explored this approach by using it for global screening of a library of protein tyrosine kinase/phosphatase (PTK/PTP) inhibitors to investigate their impact on macrophage activation. Collectively, our findings suggest that the cellular impedance-based assay provides a promising approach for dynamically monitoring macrophage functions in a convenient and high-throughput manner.


Assuntos
Ativação de Macrófagos , Animais , Antraquinonas/farmacologia , Análise por Conglomerados , Avaliação Pré-Clínica de Medicamentos , Inibidores Enzimáticos/análise , Inibidores Enzimáticos/farmacologia , Interferon gama/metabolismo , Cinética , Lipopolissacarídeos , Ativação de Macrófagos/efeitos dos fármacos , Macrófagos/efeitos dos fármacos , Macrófagos/metabolismo , Camundongos , Fenótipo , Fosforilação/efeitos dos fármacos , Células RAW 264.7 , Fatores de Tempo
14.
Cell Death Dis ; 7(11): e2470, 2016 11 10.
Artigo em Inglês | MEDLINE | ID: mdl-27831560

RESUMO

Acute lung injury (ALI) and its more severe form, acute respiratory distress syndrome (ARDS), are life-threatening diseases that are associated with high mortality rates due to treatment limitations. Neutrophils play key roles in the pathogenesis of ALI/ARDS by promoting the inflammation and injury of the alveolar microenvironment. To date, in vivo functional approaches have been limited by the inaccessibility to the alveolar sacs, which are located at the anatomical terminal of the respiratory duct in mammals. We are the first to characterize the swim bladder of the zebrafish larva, which is similar to the mammalian lung, as a real-time in vivo model for examining pulmonary neutrophil infiltration during ALI. We observed that the delivery of exogenous materials, including lipopolysaccharide (LPS), Poly IC and silica nanoparticles, by microinjection triggered significant time- and dose-dependent neutrophil recruitment into the swim bladder. Neutrophils infiltrated the LPS-injected swim bladder through the blood capillaries around the pneumatic duct or a site near the pronephric duct. An increase in the post-LPS inflammatory cytokine mRNA levels coincided with the in vivo neutrophil aggregation in the swim bladder. Microscopic examinations of the LPS-injected swim bladders further revealed in situ injuries, including epithelial distortion, endoplasmic reticulum swelling and mitochondrial injuries. Inhibitor screening assays with this model showed a reduction in neutrophil migration into the LPS-injected swim bladder in response to Shp2 inhibition. Moreover, the pharmacological suppression and targeted disruption of Shp2 in myeloid cells alleviated pulmonary inflammation in the LPS-induced ALI mouse model. Additionally, we used this model to assess pneumonia-induced neutrophil recruitment by microinjecting bronchoalveolar lavage fluid from patients into swim bladders; this injection enhanced neutrophil aggregation relative to the control. In conclusion, our findings highlight the swim bladder as a promising and powerful model for mechanistic and drug screening studies of alveolar injuries.


Assuntos
Lesão Pulmonar Aguda/patologia , Sacos Aéreos/patologia , Ar , Inflamação/patologia , Neutrófilos/patologia , Peixe-Zebra/fisiologia , Sacos Aéreos/ultraestrutura , Animais , Movimento Celular , Citocinas/metabolismo , Modelos Animais de Doenças , Lipopolissacarídeos , Camundongos , Infiltração de Neutrófilos , Proteína Tirosina Fosfatase não Receptora Tipo 11/deficiência , Proteína Tirosina Fosfatase não Receptora Tipo 11/metabolismo
15.
Biochem Pharmacol ; 115: 51-63, 2016 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-27288548

RESUMO

Chronic inflammation in the intestine is a strong risk factor for colitis-associated colorectal cancer (CAC). Hydroxychloroquine (HCQ) is widely used as an anti-inflammatory drug in the treatment of immune-mediated inflammatory disorders and various tumors. However, little is known regarding the effects of HCQ on colitis-associated tumorigenesis. In this study, mice treated with HCQ showed a significant reduction in early-stage colitis following azoxymethane (AOM)/dextran sodium sulfate (DSS) administration, as well as a remarkable inhibition of colonic tumorigenesis and tumor growth at late stages of CAC. Mechanistically, the therapeutic effects of HCQ were attributed to inhibition of inflammatory responses and production of mutagenic reactive oxygen species (ROS) in immune cells and subsequent promotion of apoptosis and cell cycle arrest in tumor cells. Furthermore, we found that HCQ inhibited the production of inflammatory cytokines and ROS in response to toll-like receptor 4 (TLR4) activation in macrophages. Our data presented herein may help guide the clinical use of HCQ as a prevention and treatment strategy for CAC.


Assuntos
Anti-Inflamatórios não Esteroides/uso terapêutico , Carcinogênese/efeitos dos fármacos , Colite/tratamento farmacológico , Neoplasias Colorretais/prevenção & controle , Hidroxicloroquina/uso terapêutico , Animais , Proliferação de Células/efeitos dos fármacos , Colite/complicações , Colite/patologia , Neoplasias Colorretais/etiologia , Citocinas/metabolismo , Inflamação/prevenção & controle , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Células RAW 264.7 , Espécies Reativas de Oxigênio/metabolismo
16.
Cancer Lett ; 379(1): 124-33, 2016 08 28.
Artigo em Inglês | MEDLINE | ID: mdl-27264264

RESUMO

The epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) have dramatically prolonged the overall survival of non-small cell lung cancer (NSCLC) patients with EGFR-activating mutation, but the presence of primary or acquired resistance eventually leads to therapeutic failure. Thus, how to improve the efficacy and reverse the resistance to EGFR-TKIs remains a significant challenge. In this study, we found that CsA significantly augmented the anti-cancer effect of gefitinib in EGFR-TKI-sensitive and -resistant NSCLC cells. Mechanistically, CsA promoted gefitinib-induced apoptosis through inhibition of the STAT3 pathway. Similar with the function of CsA, siRNAs against STAT3 also enhanced gefitinib-induced apoptosis in multiple lung cancer cells. Xenograft studies further demonstrated that CsA promoted the anti-cancer activity of gefitinib on lung cancer cells through inhibition of STAT3. Moreover, NSCLC patients with high levels of phosphorylated STAT3 (Y705) showed a significantly poorer therapeutic response to EGFR-TKIs. This study provides preclinical evidence that the combination of CsA or a STAT3 inhibitor with EGFR-TKIs is a promising approach to improve the efficacy of EGFR-TKIs for the treatment of patients with advanced NSCLC.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Apoptose/efeitos dos fármacos , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Ciclosporina/farmacologia , Receptores ErbB/antagonistas & inibidores , Neoplasias Pulmonares/tratamento farmacológico , Inibidores de Proteínas Quinases/farmacologia , Quinazolinas/farmacologia , Fator de Transcrição STAT3/antagonistas & inibidores , Células A549 , Animais , Carcinoma Pulmonar de Células não Pequenas/genética , Carcinoma Pulmonar de Células não Pequenas/metabolismo , Carcinoma Pulmonar de Células não Pequenas/patologia , Relação Dose-Resposta a Droga , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Receptores ErbB/metabolismo , Feminino , Gefitinibe , Humanos , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/patologia , Camundongos Endogâmicos BALB C , Camundongos Nus , Fatores de Transcrição NFATC/genética , Fatores de Transcrição NFATC/metabolismo , Fosforilação , Interferência de RNA , Fator de Transcrição STAT3/genética , Fator de Transcrição STAT3/metabolismo , Transdução de Sinais/efeitos dos fármacos , Fatores de Tempo , Transfecção , Carga Tumoral/efeitos dos fármacos , Ensaios Antitumorais Modelo de Xenoenxerto
17.
Cancer Lett ; 372(2): 226-38, 2016 Mar 28.
Artigo em Inglês | MEDLINE | ID: mdl-26803057

RESUMO

Store-operated Ca(2+) entry (SOCE) inhibitors are emerging as an attractive new generation of anti-cancer drugs. Here, we report that SKF-96365, an SOCE inhibitor, exhibits potent anti-neoplastic activity by inducing cell-cycle arrest and apoptosis in colorectal cancer cells. In the meantime, SKF-96365 also induces cytoprotective autophagy to delay apoptosis by preventing the release of cytochrome c (cyt c) from the mitochondria into the cytoplasm. Mechanistically, SKF-96365 treatment inhibited the calcium/calmodulin-dependent protein kinase IIγ (CaMKIIγ)/AKT signaling cascade in vitro and in vivo. Overexpression of CaMKIIγ or AKT abolished the effects of SKF-96365 on cancer cells, suggesting a critical role of the CaMKIIγ/AKT signaling pathway in SFK-96365-induced biological effects. Moreover, Hydroxychloroquine (HCQ), an FDA-approved drug used to inhibit autophagy, could significantly augment the anti-cancer effect of SFK-96365 in a mouse xenograft model. To our best knowledge, this is the first report to demonstrate that calcium/CaMKIIγ/AKT signaling can regulate apoptosis and autophagy simultaneously in cancer cells, and the combination of the SOCE inhibitor SKF-96365 with autophagy inhibitors represents a promising strategy for treating patients with colorectal cancer.


Assuntos
Antineoplásicos/farmacologia , Apoptose/efeitos dos fármacos , Autofagia/efeitos dos fármacos , Bloqueadores dos Canais de Cálcio/farmacologia , Sinalização do Cálcio/efeitos dos fármacos , Proteína Quinase Tipo 2 Dependente de Cálcio-Calmodulina/metabolismo , Neoplasias Colorretais/tratamento farmacológico , Imidazóis/farmacologia , Proteínas Proto-Oncogênicas c-akt/metabolismo , Animais , Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Proteína Quinase Tipo 2 Dependente de Cálcio-Calmodulina/genética , Proliferação de Células/efeitos dos fármacos , Neoplasias Colorretais/enzimologia , Neoplasias Colorretais/genética , Neoplasias Colorretais/patologia , Citocromos c/metabolismo , Relação Dose-Resposta a Droga , Feminino , Células HCT116 , Células HT29 , Humanos , Hidroxicloroquina/farmacologia , Camundongos Endogâmicos BALB C , Camundongos Nus , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Proteínas Proto-Oncogênicas c-akt/genética , Serina-Treonina Quinases TOR/metabolismo , Fatores de Tempo , Transfecção , Ensaios Antitumorais Modelo de Xenoenxerto
18.
Int J Cancer ; 138(9): 2067-77, 2016 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-26355642

RESUMO

Ca(2+) acts as a universal and versatile second messenger in the regulation of a myriad of biological processes, including cell proliferation, differentiation, migration and apoptosis. Store-operated Ca(2+) entry (SOCE) mediated by ORAI and the stromal interaction molecule (STIM) constitutes one of the major routes of calcium entry in nonexcitable cells, in which the depletion of intracellular Ca(2+) stores triggers activation of the endoplasmic reticulum (ER)-resident Ca(2+) sensor protein STIM to gate and open the ORAI Ca(2+) channels in the plasma membrane (PM). Accumulating evidence indicates that SOCE plays critical roles in cancer cell proliferation, metastasis and tumor neovascularization, as well as in antitumor immunity. We summarize herein the recent advances in our understanding of the function of SOCE in various types of tumor cells, vascular endothelial cells and cells of the immune system. Finally, the therapeutic potential of SOCE inhibitors in the treatment of cancer is also discussed.


Assuntos
Canais de Cálcio/metabolismo , Cálcio/metabolismo , Neoplasias/metabolismo , Neoplasias/patologia , Animais , Humanos
19.
Oncotarget ; 6(37): 40268-82, 2015 Nov 24.
Artigo em Inglês | MEDLINE | ID: mdl-26384345

RESUMO

Autophagy is an evolutionarily conserved survival pathway in eukaryote and is frequently upregulated in cancer cells after chemotherapy or targeted therapy. Thus induction of autophagy has emerged as a drug resistance mechanism. In this study, we found that crizotinib induced a high level of autophagy in lung cancer cells through inhibition of STAT3. Ectopic expression of wild-type or constitutive activated STAT3 significantly suppressed the effect of crizotinib on autophagy. Interestingly, crizotinib-mediated inhibition of STAT3 is in a step-wise manner. Firstly it inhibited cytoplasmic STAT3, which leads to the phosphorylation of EIF2A, then inhibited nuclear STAT3, which leads to the downregulation of BCL-2. Cell death induced by crizotinib was greatly enhanced after the inhibition of autophagy by the pharmacological inhibitors or shRNAs against Beclin-1. Moreover, the autophagy inhibitor HCQ significantly augmented the anti-tumor effect of crizotinib in a mouse xenograft model. In conclusion, crizotinib can induce cytoprotective autophagy by suppression of STAT3 in lung cancer cells. Thus, autophagy inhibition represents a promising approach to improve the efficacy of crizotinib in the treatment of targeted lung cancer patients.


Assuntos
Autofagia/efeitos dos fármacos , Neoplasias Pulmonares/tratamento farmacológico , Pirazóis/farmacologia , Piridinas/farmacologia , Fator de Transcrição STAT3/metabolismo , Transdução de Sinais/efeitos dos fármacos , Animais , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Crizotinibe , Sinergismo Farmacológico , Fator de Iniciação 2 em Eucariotos/metabolismo , Feminino , Humanos , Hidroxicloroquina/farmacologia , Immunoblotting , Neoplasias Pulmonares/metabolismo , Camundongos Endogâmicos BALB C , Camundongos Nus , Microscopia Eletrônica de Transmissão , Microscopia de Fluorescência , Proteínas Associadas aos Microtúbulos/metabolismo , Fagossomos/efeitos dos fármacos , Fagossomos/metabolismo , Fagossomos/ultraestrutura , Fosforilação/efeitos dos fármacos , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Ensaios Antitumorais Modelo de Xenoenxerto
20.
Cancer Lett ; 361(2): 174-84, 2015 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-25766658

RESUMO

Since nuclear factor of activated T cells (NFAT) was first identified as a transcription factor in T cells, various NFAT isoforms have been discovered and investigated. Accumulating studies have suggested that NFATs are involved in many aspects of cancer, including carcinogenesis, cancer cell proliferation, metastasis, drug resistance and tumor microenvironment. Different NFAT isoforms have distinct functions in different cancers. The exact function of NFAT in cancer or the tumor microenvironment is context dependent. In this review, we summarize our current knowledge of NFAT regulation and function in cancer development and treatment. NFATs have emerged as a potential target for cancer prevention and therapy.


Assuntos
Fatores de Transcrição NFATC/metabolismo , Neoplasias/tratamento farmacológico , Neoplasias/metabolismo , Animais , Carcinogênese , Humanos , Metástase Neoplásica , Neoplasias/patologia , Isoformas de Proteínas , Linfócitos T/metabolismo , Microambiente Tumoral
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