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2.
Drug Des Devel Ther ; 12: 2423-2430, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30122900

RESUMO

Bevacizumab, which is a humanized anti-VEGF antibody, has been successfully applied in clinics since 2004. Bevacizumab in combination with chemotherapy showed high safety and has been applied to solid tumors. However, studies on the insight into the mechanism about the antiangiogenesis activity of bevacizumab were mostly done on mice models, and so there are no visual and intuitive models to observe the process of antiangiogenesis. Here, we first used a zebrafish model to investigate the angiogenesis suppressing behavior of bevacizumab. Our results showed that bevacizumab inhibited formation of zebrafish subintestinal veins, which mimics the process of tumor angiogenesis in vivo. Meanwhile, bevacizumab caused specific vasculature formation defects in subintestinal veins but not in the trunk. Our study also indicated that bevacizumab could inhibit zebrafish retinal angiogenesis with therapeutic potential.


Assuntos
Inibidores da Angiogênese/farmacologia , Bevacizumab/farmacologia , Fator A de Crescimento do Endotélio Vascular/antagonistas & inibidores , Animais , Relação Dose-Resposta a Droga , Peixe-Zebra
3.
Cell Physiol Biochem ; 49(1): 235-244, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30138935

RESUMO

BACKGROUND/AIMS: CD133+ cancer cells display low sensitivity to anti-cancer treatment; thus, combination treatment with adjuvant drugs is required to improve the efficiency of cancer therapy. The aim of this study was to explore the effect of imperatorin, a linear furanocoumarin compound, on γδ T cell-mediated cytotoxicity against CD133+ lung cancer cells. METHODS: CD133+ and CD133- subgroups from A549 and PC9 lung cancer cells were sorted by using flow cytometry. The cytotoxicity of γδ T cells against cancer cells was evaluated by measuring lactate dehydrogenase release. The concentration of tumor necrosis factor-related apoptosis-inducing ligand in the co-culture system was determined by using an enzyme-linked immunosorbent assay. Mitochondrial membrane potential, expression of death receptor 4 (DR4) and DR5 on the cell surface, and rate of apoptosis were measured by flow cytometry. Cytochrome c release and cellular protein expression were detected by western blot analysis. RESULTS: Compared with CD133- cells, CD133+ cells were resistant to γδ T cell-mediated cytotoxicity. However, imperatorin significantly increased the sensitivity of CD133+ lung cancer cells to γδ T cell treatment in vitro and in vivo. Mechanically, we found that myeloid cell leukemia 1 (MCL-1), an important anti-apoptotic protein belonging to the Bcl-2 family, was overexpressed in CD133+ A549 and PC9 cells compared to their corresponding CD133- cells. Co-treatment with imperatorin and γδ T cells suppressed the expression of MCL-1, and thus promoted the mitochondrial apoptosis mediated by γδ T cells in CD133+ A549 and PC9 lung cancer cells. CONCLUSION: Up-regulated MCL-1 in CD133+ lung cancer cells is responsible for their resistance to γδ T cells. Furthermore, the combination of γδ T cells with imperatorin sensitized CD133+ lung cancer cells to γδ T cell-mediated cytotoxicity by targeting MCL-1.


Assuntos
Antígeno AC133/metabolismo , Apoptose/efeitos dos fármacos , Furocumarinas/farmacologia , Linfócitos Intraepiteliais/imunologia , Proteína de Sequência 1 de Leucemia de Células Mieloides/metabolismo , Células A549 , Animais , Anticorpos Neutralizantes/imunologia , Anticorpos Neutralizantes/farmacologia , Linhagem Celular Tumoral , Citocromos c/metabolismo , Resistencia a Medicamentos Antineoplásicos , Furocumarinas/uso terapêutico , Humanos , Linfócitos Intraepiteliais/citologia , Linfócitos Intraepiteliais/metabolismo , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/patologia , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Proteína de Sequência 1 de Leucemia de Células Mieloides/antagonistas & inibidores , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Receptores do Ligante Indutor de Apoptose Relacionado a TNF/metabolismo , Ligante Indutor de Apoptose Relacionado a TNF/imunologia
4.
Oncotarget ; 8(47): 81978-81993, 2017 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-29137238

RESUMO

Purpose: This study aimed to take a comprehensive review of the hematological indexes and discover a novel, comprehensive, and economical index for prognostic prediction. Results: The predictive prognostic model revealed that an elevated value of NLDA (NLDA = neutrophil count/lymphocyte count × D-dimer count/albumin) was an independent risk factor for one-year adverse prognosis (hazard ratio = 3.038; 95% confidence interval [CI], 1.959-4.712; P < 0.001). The C-indexes of internal and external validation in nomogram were 0.738 (95% CI, 0.686-0.79) and 0.731 (95% CI, 0.631-0.831), respectively. The areas under the curves of the NLDA values in retrospective and prospective studies were 0.700 (95% CI, 0.631-0.769; P < 0.001) and 0.692 (95% CI, 0.535-0.822; P = 0.005), respectively. The cut-off value of NLDA was 0.15. NLDA was positively associated with M stage (P = 0.032), organ metastasis counts (P = 0.006), liver metastases (P = 0.019), and vertebrae metastases (P = 0.013). Materials and Methods: This was a retrospective and prospective study. The clinicopathological characteristics and hematological parameters of stage IV non-small cell lung cancer patients were analyzed retrospectively and prospectively to establish a valid predictive prognostic model. The primary endpoint was the 1-year overall survival. The predictive prognostic model was established and validated by Cox Regression and nomogram. The cut-off and predictive prognostic values of the novel indexes were calculated through the receiver operating characteristic curves. The chi-square test was used to explore the correlation between the new prognostic hematological index and metastatic characteristics. Conclusions: In this study, NLDA, a new, comprehensive and economic parameter, was found to be an independent adverse prognostic factor for stage IV non-small cell lung cancer patients, and was positively associated with organ metastases.

5.
Cancer Biomark ; 20(4): 581-588, 2017 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-28946557

RESUMO

Tyrosine kinase inhibitors (TKIs), a novel group of target-specific anti lung cancer drugs, have recently been found to resistant to some NSCLC cells which have the T790M EGFR mutation. However, recent investigations on the therapies of resistance to EGFR-TKIs are very limited. Therefore, it is important to develop more effective therapies to reverse EGFR-TKIs resistance. In our present study, erlotinib was used as the TKIs drug and the effects of the erlotinib on cell growth were evaluated. Cell viability and concentration dependent studies were performed using HCI-H1975 and HCI-H1299 cells alone with erlotinib, respectively. Further combined with rituximab, the results showed that erlotinib and rituximab were significantly inhibited the cell growth. Furthermore, the combination of erlotinib and rituximab greatly decreased the expression of p-mTOR and p-EGFR. Additional results from western blotting and immunofluorescence assays demonstrated that the accumulation of rictor was also decreased on MAM. Thus, all these results suggested that EGFR-TKIs combined with CD20 mono-antibody significantly decrease the cell growth of H1975 cells and H1299, with T790M EGFR mutation, and inhibit the localization of the key mTOR pathway proteins to MAM. So, it may be a promising strategy for overcoming EGFR TKI resistance in NSCLC patients.


Assuntos
Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Retículo Endoplasmático/metabolismo , Membranas Intracelulares/metabolismo , Mitocôndrias/metabolismo , Inibidores de Proteínas Quinases/farmacologia , Proteína Companheira de mTOR Insensível à Rapamicina/metabolismo , Rituximab/farmacologia , Linhagem Celular Tumoral , Resistencia a Medicamentos Antineoplásicos/genética , Receptores ErbB/genética , Humanos , Concentração Inibidora 50 , Mutação , Fosforilação , Serina-Treonina Quinases TOR/metabolismo
6.
Sci Rep ; 7(1): 8483, 2017 08 16.
Artigo em Inglês | MEDLINE | ID: mdl-28814805

RESUMO

Epidermal growth factor receptor tyrosine-kinase inhibitors (EGFR-TKIs) are standard treatment for advanced non-small cell lung cancer (NSCLC) patients with epidermal growth factor receptor (EGFR) mutation. However, EGFR mutation testing is not attainable in approximately 20% of patients. The current study examined intercalating and maintaining gefitinib treatment in stage IIIB/IV non-squamous NSCLC, never or former light smoking patients with unknown EGFR mutation status. Briefly, 219 patients who achieved stable disease (SD) with gemcitabine (1250 mg/m2) plus carboplatin (5 AUC) were randomized at 1:1 ratio to continue chemotherapy (n = 110) or intercalating gefitinib (250 mg/day on days 15-25 of each cycle until disease progress (n = 109). Progression-free survival (PFS) was 9.7 vs. 4.2 month in the gefitinib vs. control arm (HR: 0.41, 95% CI: 0.31-0.56; P < 0.001). Overall survival (OS) was also longer in the gefitinib arm (20.1 vs. 15.4 months; HR: 0.68; 95% CI 0.48-0.97; P = 0.0323). Adverse events, including diarrhea, dermal reaction and thrombocytopenia, were more common in the gefitinib arm. In conclusion, intercalating and maintenance gefitinib treatment is a viable option for advanced NSCLC patients with unknown EGFR mutation status in subpopulations with high EFGR mutation rate.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Gefitinibe/uso terapêutico , Neoplasias Pulmonares/tratamento farmacológico , Adolescente , Adulto , Idoso , Antimetabólitos Antineoplásicos/administração & dosagem , Carboplatina/administração & dosagem , Carcinoma Pulmonar de Células não Pequenas/patologia , Desoxicitidina/administração & dosagem , Desoxicitidina/análogos & derivados , Intervalo Livre de Doença , Receptores ErbB/genética , Feminino , Gefitinibe/efeitos adversos , Humanos , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Inibidores de Proteínas Quinases/administração & dosagem , Inibidores de Proteínas Quinases/uso terapêutico , Fumantes
7.
Oncol Lett ; 13(6): 4651-4656, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28599465

RESUMO

Pulmonary enteric adenocarcinoma is a markedly rare pathological type of lung adenocarcinoma. As the pancreas is a relatively uncommon site for metastasis, the present case is even more unusual. A 62-year-old male was admitted to hospital following the identification of masses in the left chest wall, right abdominal wall and right upper limb, but with no respiratory symptoms. Computed tomography (CT) of the chest revealed a lump in the lung and a mass in the left chest wall, and 18F-fluorodeoxyglucose (18F-FDG) uptake by the lumps was increased. An enhanced abdominal CT revealed a hypodense and homogeneous mass on the head of the pancreas, which was slightly enhanced compared with normal pancreatic tissue. In addition, the 18F-FDG uptake of the lesion was increased and the standardized uptake value (SUV) delayed was not evidently decreased compared with SUVearly. A number of other abnormal metabolic lesions were also identified using positron emission tomography/CT, whereas no abnormal 18F-FDG uptake was identified in the gastrointestinal organ. Furthermore, rectocolonoscopy was performed to exclude diagnosis of metastatic colorectal adenocarcinoma. The hematoxylin- and eosin-stained smears of the masses in the right lung and left chest demonstrated an enteric pattern, which shared morphological and immunohistochemical (IHC) features with those of colorectal adenocarcinoma. The IHC detection revealed that the lesions in the right lung were positive for cytokeratin 7 (CK7), and negative for CK20 and thyroid transcription factor 1 (TTF-1), and the expression of caudal type homeobox 2 (CDX2) was weakly positive; the masses in the left chest wall were positive for CK7, negative for TTF-1, and CK20 and CDX2 were weakly expressed.

8.
Onco Targets Ther ; 10: 2413-2424, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28496340

RESUMO

Circulating tumor cells (CTCs) possess profound influence on tumor metastases and disease progression. This study aimed to investigate the correlation of CTCs with clinical characteristics and T-cell immunity, and to explore whether CTCs and the subpopulations can serve as an independent prognostic factor in advanced non-small cell lung cancer (NSCLC). A prospective study was conducted in late stages of NSCLC patients. The levels of overall CTCs and the three subpopulation CTCs were enumerated using the CanPatrol™ CTC enrichment system. The information about the patients which included the clinical characteristics, survival status at the 200th day postdiagnosis, and the levels of T cells was collected. Mann-Whitney U test, Kruskal-Wallis H test, Cox regression, and Spearman's rank correlation coefficient were the statistical methods used in this study. We detected CTCs in 27 of the 31 eligible patients; the level of epithelial-mesenchymal circulating tumor cells (EMCTCs) was higher than that of epithelial circulating tumor cells and that of mesenchymal circulating tumor cells (MCTCs) in the majority of NSCLC patients. Organ metastases were positively associated with the levels of overall CTCs, EMCTCs, and MCTCs (P<0.05). EMCTCs and MCTCs were associated with worse clinical outcomes. Additionally, the levels of EMCTCs were negatively associated with the levels of CD3+ T cells (P=0.01) and CD8+ T cells (P=0.04). In conclusion, the levels of CTCs were positively associated with organ metastases, particularly bone metastases, but were negatively associated with T-cell levels. The levels of EMCTCs and MCTCs had negative prognostic value.

9.
Oncotarget ; 8(65): 109068-109078, 2017 Dec 12.
Artigo em Inglês | MEDLINE | ID: mdl-29312591

RESUMO

Lung cancer is one of the deadliest malignant tumors with limited treatment options. Although targeted therapy, using tyrosine-kinase inhibitors such as erlotinib (Erlo), has shown therapeutic benefit, only 15 % patients with mutated epidermal growth factor receptor (EGFR) in lung cancer cells are sensitive. Therefore, additional therapeutic strategy should be developed. In this study, we found that metformin (Met), which is widely used for the treatment of type 2 diabetes (T2D), sensitized lung cancer cells bearing wild-type EGFR to Erlo treatment by enriching cancer cells expressing higher levels of EGFR with persistent phosphorylation. As a consequence, combination of Met and Erlo more efficiently inhibited the growth of lung cancer cells both in vitro and in mice with xenografted tumors. Our results suggest a novel approach to treating lung cancer cases which are originally resistant to Erlo.

10.
Sci Rep ; 6: 21359, 2016 Feb 17.
Artigo em Inglês | MEDLINE | ID: mdl-26883083

RESUMO

It has been shown that angiotensin I-converting enzyme inhibitors (ACEIs) and angiotensin II type-1 receptor blockers (ARBs) can decrease tumor growth and tumor-associated angiogenesis and inhibit metastasis. Epidermal growth factor receptor (EGFR) mutations are found in approximately 30% of patients with advanced non-small cell lung cancer (NSCLC) in East Asia and in 10-15% of such patients in Western countries. We retrospectively identified 228 patients with histologically confirmed advanced NSCLC and 73 patients with early stage disease; 103 of these patients took antihypertensive drugs, and 112 received treatment with EGFR tyrosine kinase inhibitors (TKIs). There was a significant difference in progression-free survival after first-line therapy (PFS1) between the ACEI/ARB group and the non-ACEI/ARB group. For the patients treated with TKIs, there was a significant difference in PFS but not in overall survival (OS) between the ACEI/ARB group and the non-ACEI/ARB group. For the patients with advanced NSCLC, there was a significant difference in PFS1 between the ACEI/ARB group and the non-ACEI/ARB group. ACEI/ARB in combination with standard chemotherapy or TKIs had a positive effect on PFS1 or OS, regardless of whether the lung cancer was in the early or advanced stage.


Assuntos
Bloqueadores do Receptor Tipo 1 de Angiotensina II/uso terapêutico , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/mortalidade , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/mortalidade , Adulto , Idoso , Idoso de 80 Anos ou mais , Bloqueadores do Receptor Tipo 1 de Angiotensina II/administração & dosagem , Inibidores da Enzima Conversora de Angiotensina/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/patologia , Terapia Combinada , Feminino , Humanos , Estimativa de Kaplan-Meier , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Estudos Retrospectivos
11.
Tumour Biol ; 36(7): 5485-95, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-26036758

RESUMO

Epidermal growth factor receptor tyrosine kinase inhibitors (TKIs) are effective clinical therapies for advanced non-small cell lung cancer (NSCLC) patients, while resistance to TKIs remains a serious problem in clinical practice. Recently, it has been proposed that targeting mTOR could overcome TKI resistance in NSCLC cells. Forkhead box class O1 (FOXO1) has emerged as an important rheostat that modulates the activity of Akt and mTOR signaling pathway. However, the role of FOXO1 and related regulatory mechanism in TKI resistance in NSCLC remain largely unknown. Here, we find that mTOR-AKT-FOXO1 signaling cascade is deregulated in TKI-resistant NSCLC cells and that FOXO1 was highly phosphorylated and lowly acetylated upon erlotinib treatment. Combination of mTOR or PI3K inhibitor and erlotinib overcomes TKI resistance to inhibit cell growth and induce apoptosis in TKI-resistant NSCLC cells. Furthermore, the phosphorylation and acetylation of FOXO1 are reversely modulated by mTORC2-AKT signaling pathway. FOXO1 mutation analyses reveal that FOXO1 acetylation inhibits cell proliferation and promotes NSCLC cell apoptosis, while the phosphorylation of FOXO1 plays opposite roles in NSCLC cells. Importantly, increasing FOXO1 acetylation by a HDAC inhibitor, depsipeptide, overcomes TKI resistance to effectively induce TKI-resistant NSCLC cell apoptosis. Together, FOXO1 plays dual roles in TKI resistance through posttranslational modifications in NSCLC and this study provides a possible strategy for treatment of TKI-resistant NSCLC patients.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/genética , Fatores de Transcrição Forkhead/genética , Quinazolinas/administração & dosagem , Apoptose/efeitos dos fármacos , Carcinoma Pulmonar de Células não Pequenas/patologia , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Resistencia a Medicamentos Antineoplásicos/genética , Receptores ErbB/antagonistas & inibidores , Cloridrato de Erlotinib , Proteína Forkhead Box O1 , Fatores de Transcrição Forkhead/metabolismo , Humanos , Fosfatidilinositol 3-Quinases/biossíntese , Inibidores de Proteínas Quinases/administração & dosagem , Processamento de Proteína Pós-Traducional , Transdução de Sinais/genética , Serina-Treonina Quinases TOR/biossíntese
12.
J BUON ; 19(2): 466-73, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24965408

RESUMO

PURPOSE: To investigate the effects of autophagy on growth inhibition by gefitinib in non-small cell lung cancer (NSCLC) cell lines and its probable mechanism. METHODS: The mRNA and protein levels of Beclin 1, authophagy related 5 (Atg5) and Atg7 were assessed. H460 and Calu6 NSCLC cell lines were transfected with plasmids expressing green fluorescent protein (GFP)-LC3 and the formation of autophagosome was monitored under fluorescent microscope. In addition, H460 cells were treated with agonists of autophagy (everolimus and 3-methyladenine/ 3MA), AMP-activated protein kinase (AMPK) inhibitor (Compound C) and gefitinib, respectively. Cells were stained and studied under microscope. Cell colonies were counted and growth inhibition was calculated. Phosphorylated acetyl-Coenzyme A carboxylase (ACC) and AMPK were detected. Moreover, H460 cells were transfected with small interfering RNA (siRNA) against AMPK2 subunit and AMPK 2 was knocked down. RESULTS: LCII was accumulated to a higher level after treatment with gefitinib than that without addition of gefitinib, and gefitinib increased GFP punctuated cells. Besides, everolimus enhanced the autophagic process induced by gefitinib. Consistent with this, everolimus enhanced the growth inhibition of gefitinib on H460 cells. Also, incubation with gefitinib could significantly increase AMPK phosphorylation and phosphorylated ACC. Compound C AMPK inhibitor could reverse the activation of gefitinib on autophagy, as determined by Beclin 1, Atg5 and Atg7 mRNA levels. Knockdown of AMPK2 also significantly inhibited the activation of autophagy by gefitinib. CONCLUSION: Inhibition of AMPK by its antagonist (Compound C) or siRNA predominantly blocked the induction of autophagy by gefitinib.


Assuntos
Proteínas Quinases Ativadas por AMP/fisiologia , Antineoplásicos/farmacologia , Autofagia/efeitos dos fármacos , Neoplasias Pulmonares/tratamento farmacológico , Inibidores de Proteínas Quinases/farmacologia , Quinazolinas/farmacologia , Proteínas Quinases Ativadas por AMP/antagonistas & inibidores , Linhagem Celular Tumoral , Gefitinibe , Humanos
13.
Int J Clin Exp Pathol ; 6(8): 1493-504, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23923067

RESUMO

The fact that advanced NSCLC patients with wild type (wt) EGFR can benefit from erlotinib therapy makes it critical to find out biomarkers for effective selection of patients and improving the therapy effects. In present study, 3 NSCLC cell lines (U1752, Calu-6 and NCI-H292) with wt EGFR and different sensitivities to erlotinib were used for microarray analysis. The differential basal gene expression between 2 NSCLC cell lines was analyzed, about 353 genes were expression-altered with higher than 2-fold changes between Calu-6 and U1752. And Ingenuity Pathway Analysis (IPA) showed that these genes were mainly enriched in regulation of epithelial-mesenchymal transition (EMT) pathway, Wnt-ß catenin signaling, Tec kinase signaling and some types of cancer-related signaling. More interestingly, RAF1 (c-raf), MAP2K1 (MEK1), SNAI and downstream signaling molecules ERK and AKT were predicted to be activated in erlotinib-resistant cell line by IPA. Subsequent immunoblotting experiments showed that the phosphorylation of ERK and AKT were exactly increased stepwise from erlotinib sensitive cell line to erlotinib resistant cell lines. Collectively, activation of RAF1-MEK1-ERK/AKT axis may determine the resistance of NSCLC cell lines bearing wt EGFR to erlotinib. Our work provides potential biomarkers and therapeutic targets for NSCLC patients harboring wt EGFR.


Assuntos
Antineoplásicos/farmacologia , Carcinoma Pulmonar de Células não Pequenas/metabolismo , Resistencia a Medicamentos Antineoplásicos/fisiologia , Neoplasias Pulmonares/metabolismo , Quinazolinas/farmacologia , Biomarcadores Tumorais/análise , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Western Blotting , Carcinoma Pulmonar de Células não Pequenas/genética , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Receptores ErbB/genética , Receptores ErbB/metabolismo , Cloridrato de Erlotinib , Humanos , Neoplasias Pulmonares/genética , MAP Quinase Quinase 1/genética , MAP Quinase Quinase 1/metabolismo , Sistema de Sinalização das MAP Quinases/efeitos dos fármacos , Sistema de Sinalização das MAP Quinases/fisiologia , Análise de Sequência com Séries de Oligonucleotídeos , Proteínas Proto-Oncogênicas c-akt/genética , Proteínas Proto-Oncogênicas c-akt/metabolismo , Proteínas Proto-Oncogênicas c-raf/genética , Proteínas Proto-Oncogênicas c-raf/metabolismo , Reação em Cadeia da Polimerase em Tempo Real , Transcriptoma
14.
Oncol Lett ; 4(2): 247-251, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22844363

RESUMO

To determine the susceptibility genes of lung cancer, we investigated the frequency distributions of the xeroderma pigmentosum complementary group D (XPD) and cytidine deaminase (CDA) genes in patients. A case-control study was conducted involving lung cancer patients and healthy controls. The genotypic distributions of XPD exon 10 G→A (Asp312Asn) and 23 T→G (Lys751Gln), and CDA 79 A→C (Lys27Gln) and 208 G→A (Ala70Thr), were determined using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The results demonstrated that the XPD Asp312Asn genotype distribution was G/G (82.52%) and A/G (17.48%) in the lung cancer patients, and G/G (82.52%), A/G (16.50%) and A/A (10.98%) in the controls. The genotypes of Lys751Gln were T/T (83.49%) and T/G (16.50%) in the lung cancer patients, and T/T (84.47%) and T/G (15.53%) in the controls. Mutations in the XPD single nucleotide polymorphism loci did not demonstrate a significant difference between the two groups (P>0.05). The risk of lung cancer in individuals with mutations at positions 312 and 751 increased 6.13-fold (P=0.047). The CDA Lys27Gln genotype distribution was A/A (78.65%), A/C (20.39%) and C/C (0.98%) in the lung cancer patients, and A/A (79.61%), A/C (19.42%) and C/C (0.98%) in the controls (P=0.985). The CDA Ala70Thr genotype distribution was G/G (98.06%) and A/G (1.94%) in the controls, while all the genotypes were wild-type in the lung cancer patients. The difference between the lung cancer patients and the controls was not statistically significant (P=0.155). There was also no significant difference in the frequency distribution of XPD or CDA between the different pathological types (P>0.05). Our findings demonstrate that the mutation of XPD codons 312 and 751 increases the risk of lung cancer. By contrast, polymorphisms of CDA appear to have little association with lung cancer.

15.
Oncol Rep ; 27(3): 783-90, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22089256

RESUMO

The local renin-angiotensin system (RAS) is one of the crucial components in the tumor microenvironment. Recent evidence suggests that the local RAS plays an important role in tumor metabolism, survival, angiogenesis and invasion processes. Angiotensin-(1-7) [Ang-(1-7)] is an endogenous peptide of the RAS with vasodilator and anti-proliferative properties. Previous studies have demonstrated that Ang-(1-7) inhibits both the growth of human lung cancer cells in vitro and tumor angiogenesis in vivo through activation of the MAS receptor. This study investigated the anti-metastatic effect of Ang-(1-7) in A549 human lung adenocarcinoma cells in vitro. We found that Ang-(1-7) reduced the cell migratory and invasive abilities by reducing the expression and activity of MMP-2 and MMP-9. Furthermore, we demonstrated that the anti-migration and anti-invasion effect of Ang-(1-7) was mediated through inactivation of the PI3K/Akt, P38 and JNK signal pathways. Our results suggest that Ang-(1-7) may have therapeutic potential against advanced lung carcinoma as a new agent.


Assuntos
Adenocarcinoma/tratamento farmacológico , Adenocarcinoma/patologia , Angiotensina I/farmacologia , Movimento Celular/efeitos dos fármacos , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/patologia , Sistema de Sinalização das MAP Quinases/efeitos dos fármacos , Quinases de Proteína Quinase Ativadas por Mitógeno/antagonistas & inibidores , Fragmentos de Peptídeos/farmacologia , Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores , Adenocarcinoma/irrigação sanguínea , Adenocarcinoma/metabolismo , Adenocarcinoma de Pulmão , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Humanos , Neoplasias Pulmonares/irrigação sanguínea , Neoplasias Pulmonares/metabolismo , Metaloproteinase 2 da Matriz/genética , Metaloproteinase 2 da Matriz/metabolismo , Metaloproteinase 9 da Matriz/genética , Metaloproteinase 9 da Matriz/metabolismo , Quinases de Proteína Quinase Ativadas por Mitógeno/metabolismo , Invasividade Neoplásica , Neovascularização Patológica/tratamento farmacológico , Neovascularização Patológica/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Sistema Renina-Angiotensina/efeitos dos fármacos , Transdução de Sinais/efeitos dos fármacos , Sobrevida
16.
Zhongguo Fei Ai Za Zhi ; 14(7): 598-605, 2011 Jul.
Artigo em Chinês | MEDLINE | ID: mdl-21762630

RESUMO

In recent years, the incidence and mortality of advanced lung cancer in elderly patients have been increasing. However, the general acceptance of treatment more than best supportive care in the elderly patients is not optimistic, because the social-economic, family and other factors besides health care were involved in the treatment strategy. In this review, we summarize the current status and prospect of treatment protocols for elderly patients with non-small cell lung cancer.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/uso terapêutico , Humanos , Pessoa de Meia-Idade
17.
Oncol Rep ; 26(5): 1157-64, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-21769437

RESUMO

Angiotensin II (AngII) is a multifunctional bioactive peptide in the renin-angiotensin system (RAS). Angiotensin-converting enzyme 2 (ACE2) is a newly identified component of RAS. The role of AngII and ACE2 in the metastasis of non-small cell lung cancer (NSCLC) and the effects on matrix metalloproteinases (MMPs) are still unknown. In the present study, the anti-invasive effect and mechanism of ACE2 were investigated in vitro and in vivo. Results of a transwell assay showed that the overexpression of ACE2 reduces the invasive ability of A549 cells in vitro. According to the results of qRT-PCR and western blot analysis, the inhibitory role of ACE2 was mediated through the down-regulation of MMP-2 and MMP-9. Additionally, we confirmed that the overexpression of ACE2 inhibited cell growth and VEGFa production while simultaneously suppressing ACE and angiotensin II type 1 receptor (AT1R) expression in human lung cancer xenografts. These results suggest that the overexpression of ACE2 may potentially suppress the invasion and angiogenesis of NSCLC.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/metabolismo , Neoplasias Pulmonares/metabolismo , Peptidil Dipeptidase A/biossíntese , Animais , Carcinoma Pulmonar de Células não Pequenas/irrigação sanguínea , Carcinoma Pulmonar de Células não Pequenas/genética , Carcinoma Pulmonar de Células não Pequenas/patologia , Linhagem Celular Tumoral , Regulação para Baixo , Feminino , Humanos , Neoplasias Pulmonares/irrigação sanguínea , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/patologia , Masculino , Metaloproteinase 2 da Matriz/biossíntese , Metaloproteinase 2 da Matriz/genética , Metaloproteinase 2 da Matriz/metabolismo , Metaloproteinase 9 da Matriz/biossíntese , Metaloproteinase 9 da Matriz/genética , Metaloproteinase 9 da Matriz/metabolismo , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Invasividade Neoplásica , Neovascularização Patológica/genética , Neovascularização Patológica/metabolismo , Neovascularização Patológica/patologia , Peptidil Dipeptidase A/genética , Transdução de Sinais , Transdução Genética , Ensaios Antitumorais Modelo de Xenoenxerto
18.
Zhonghua Jie He He Hu Xi Za Zhi ; 29(3): 164-6, 2006 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-16677478

RESUMO

OBJECTIVE: To improve the understanding of pulmonary sclerosing hemangioma (PSH). METHODS: The clinical data of 15 cases of PSH were analyzed, and the literature was reviewed. The etiology, clinical manifestations, differential diagnosis, treatment and outcome of PSH were described. RESULTS: The etiology and histological origin of PSH were unclear. Most cases were asymptomatic or only with mild symptoms. The radiology of PSH often showed isolated nodule with distinct margin in the lung field. The characteristics of its pathological manifestation were as follows: (1) background of cell gathering or mucin matrix with scattered white blood cells; (2) proliferation of hemangioma with sclerosis of vessel wall; (3) papillary proliferation of small vessels intruding into the air space; (4) existence of hemorrhage or sclerosis zone. Immunohistological studies had not defined the correct histological origin of PSH. A pre-operation diagnosis of PSH was difficult. Thirteen cases had been misdiagnosed as malignancy. The outcome of the disease was good when early surgical resection was performed. CONCLUSIONS: PSH is an uncommon disease, and can be easily misdiagnosed. More attention should be paid to its clinical features and management.


Assuntos
Hemangioma Esclerosante Pulmonar/diagnóstico , Hemangioma Esclerosante Pulmonar/patologia , Adulto , Idoso , Diagnóstico Diferencial , Feminino , Humanos , Pessoa de Meia-Idade
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