Hamartoma folicular basaloide / Basaloid follicular hamartoma

O hamartoma folicular basaloide (HFB) é um tumor anexial raro e benigno, que se assemelha ao carcinoma basocelular (CBC), e pode apresentar manifestações clínicas diversas. Uma mutação no gene PTCH, envolvido na síndrome de Gorlin-Goltz, poderia estar associada à patogênese dessa neoplasia. Descreve-se caso de menina, sete anos, apresentando múltiplas pápulas na face.

Basaloid follicular hamartoma (BFH) is a rare and benign adnexal tumor that resembles basal cell carcinoma (BCC) and may present with different clinical manifestations. A mutation in the PTCH gene, involved in Gorlin-Goltz syndrome, could be associated with the pathogenesis of this neoplasm. We describe the case of a 7-year-old girl with multiple papules on her face.

Mechanism of action of forkhead box transcription factors in hepatocellular carcinoma and their prospects as treatment targets / 临床肝胆病杂志

Hepatocellular carcinoma (HCC) is one of the most common malignant cancers and has high incidence and mortality rates and poor prognosis. Forkhead box (FOX) transcription factor family can regulate cell growth, differentiation, and tissue development and plays an important role in tumor. This article reviews the association of the molecular expression of the FOX family with the development, progression, and prognosis of HCC and analyzes the mechanism of action of FOX in the progression of HCC. It is pointed out that FOX family is expected to become a new target for HCC treatment.

Expression of NF2 Modulates the Progression of BRAFV600E Mutated Thyroid Cancer Cells

BACKGROUND: We previously reported the frequent neurofibromatosis 2 (NF2) gene mutations in anaplastic thyroid cancers in association with the BRAF V600E mutation. We aimed to investigate the role of NF2 in thyroid cancer with BRAF mutation. METHODS: To identify the function of NF2 in thyroid cancers, we investigated the changes in cell proliferation, colon formation, migration and invasion of thyroid cancer cells (8505C, BHT101, and KTC-1) with BRAF V600E mutation after overexpression and knock-down of NF2. We also examined how cell proliferation changed when NF2 was mutagenized. Human NF2 expression in papillary thyroid carcinoma (PTC) was analyzed using the The Cancer Genome Atlas (TCGA) data. RESULTS: First, NF2 was overexpressed in 8505C and KTC-1 cells. Compared to control, NF2 overexpressed group of both thyroid cancer cells showed significant inhibition in cell proliferation and colony formation. These results were also confirmed by cell migration and invasion assay. After knock-down of NF2 in 8505C cells, there were no significant changes in cell proliferation and colony formation, compared with the control group. However, after mutagenized S288* and Q470* sites of NF2 gene, the cell proliferation increased compared to NF2 overexpression group. In the analysis of TCGA data, the mRNA expression of NF2 was significantly decreased in PTCs with lateral cervical lymph node (LN) metastasis compared with PTCs without LN metastasis. CONCLUSION: Our study suggests that NF2 might play a role as a tumor suppressor in thyroid cancer with BRAF mutation. More studies are needed to elucidate the mechanism how NF2 acts in thyroid cancer with BRAF mutation.

Mechanism underlying the inhibitory effect of overexpression of tumor suppressor gene DKK3 on migration and invasion of human cutaneous malignant melanoma cells / 中华皮肤科杂志

Objective To investigate the expression of DKK3 in human cutaneous malignant melanoma cells and tissues,and to evaluate the effect of transfection with DKK3 gene on migration and invasion of a malignant melanoma cell line A375.Methods Western blot analysis was performed to measure the relative expression of DKK3 in human cutaneous melanoma cell lines HM,A375,WM451,SK-MEL-1,Hs-695T,MDA-MB-435s and WM35,as well as pigmented nevus tissues.Real-time fluorescence-based quantitative PCR (RT-PCR) was conducted to determine the mRNA expression of DKK3 in 58 melanoma tissues (including primary melanoma and metastatic melanoma) and 30 pigmented nevus tissues from Chongqing Traditional Chinese Medicine Hospital between August 2014 and June 2017.The pcDNA3.1 (+)-Flag-Vector (control group) and pcDNA3.1 (+)-Flag-DKK3 (transfection group) were transfected into A375 melanoma cells separately.RT-PCR and Western blot analysis were performed to verify the overexpression of DKK3,and to evaluate the effect of DKK3 overexpression on the expression of molecules related to the migration and invasion of melanoma cells.Cell scratch assay,Transwell migration and invasion assay were conducted to assess the effect of DKK3 on the migration and invasion of A375 cells.Statistical analysis was done by a two-sample t-test for comparisons between two groups,one-way analysis of variance (ANOVA) for intergroup comparison,and least significant difference (LSD)-t test for multiple comparisons with the SPSS 13.0 software.Results DKK3 protein was absent or lowly expressed in the human melanoma cell lines,but highly expressed in the pigmented nevus tissues.There were significant differences in the mRNA expression of DKK3 among the primary melanoma tissues (2-ΔΔCt:[0.325 ± 0.150] × 10-3),metastatic melanoma tissues ([0.142 ± 0.210] × 103) and pigmented nevus tissues ([0.634 ±:0.120] × 10-3,F =46.57,P ＜ 0.05).In addition,the mRNA expression of DKK3 was significantly lower in the metastatic melanoma tissues than in the primary melanoma tissues and pigmented nevus tissues (LSD-t =2.48,3.12,both P ＜ 0.05).After transfection with DKK3,cell scratch assay showed that the migration rate was significantly lower in the transfection group (22.11％ ± 5.11％) than in the control group (54.36％ ± 23.22％,t =2.36,P ＜ 0.001).Transwell migration and invasion assay revealed that the number of A375 cells crossing the Transwell chamber was significantly lower in the transfection group (265 ± 33,76 ± 18 respectively) than in the control group (429 ± 41,135 ± 21 respectively;t =1.24,1.35 respectively,both P ＜ 0.001).After overexpression of DKK3 in the A375 cells in the transfection group,the mRNA and protein expression of E-cadherin were up-regulated,while the mRNA and protein expression of N-cadherin,vimentin,matrix metalloproteinase 2 (MMP2),MMP7 and MMP11 were down-regulated compared with the control group.Conclusions The expression of DKK3 is down-regulated in the melanoma cell lines and tissues,and the migration and invasion of A375 cells are markedly inhibited by overexpression of DKK3.DKK3 may be a target for inhibiting the metastasis of cutaneous malignant melanoma.

Effect of microRNA-134-5p targeting EGFR on growth of ovarian cancer SKOV3 and A2780 cells / 重庆医学

Objective To investigate the effect of microRNA-134-5p (miR-134-5p) targeting epidermal growth factor receptor (EGFR) on the growth of ovarian cancer cells.Methods The ovarian cancer cell lines SKOV3 and A2780 served as the study objects and were divided into the control group (transfecting miR-NC) and experimental group (transfecting miR-134-5p) according to the treatment method.The expression levels of EGFR gene and downstream target protein were detected by qRT-PCR and western blot.The cell cycle distribution and apoptosis were detected by flow cytometry.The proliferation ability of ovarian cancer cells was detected by MTT assay and colony forming assay.Results The expressions of EGFR and downstream target protein in the experimental group were significantly down-regulated.EGFR mRNA in SKOV3 cells was downregulated to 48％ (P＜0.05),and EGFR mRNA in A2780 cells was down-regulated to 47％ (P＜0.05).The cell cycle of cells in the experimental group was significantly inhibited (P＜0.05),and miR-134-5p induced apoptosis through the EGFR target protein (P＜0.05).The proliferation activity and colony forming ability of the experimental group were significantly inhibited (P＜0.05).Conclusion miR-134-5p could promote the cellular cycle arrest and apoptosis,and reduces the proliferation ability of ovarian cancer cells by targetedly inhibiting the EGFR gene.

The progress of clinical precision medicine in castration-resistant prostate cancer / 天津医药

Most prostate cancer (PCa) patients in China are diagnosed at an advanced stage. Many PCa patients are initially sensitive to hormonal therapy and experience temporary tumor regression, but nearly all of the patients finally reach a state of castration-resistant prostate cancer (CRPC). CRPC is difficult to cure and thus has poor prognosis. The identification of new therapies to treat CRPC remains an urgent need. Precision medicine is to develop the most appropriate individualized treatment for each patient based on the level of individual differences. Genomic, proteomics, metabolomics data, and other big data analysis methods are the essence of precision medicine. Precision medicine brings the hope to overcome cancer. In this review, we summarize the connotation of precision medicine in CRPC, the application of second generation sequencing and genome sequencing, and clinical molecular targeted therapy of CRPC as well as discuss clinical precision medicine for CRPC.

Expression of large tumor suppressor homolog 2 gene and its promotor methylation in oral squamous cell carcinoma / 中华口腔医学杂志

Objective@#To investigate the expression of large tumor suppressor homolog 2 (LATS2) gene and its promotor methylation in oral squamous cell carcinoma (OSCC).@*Methods@#Reverse transcription-PCR (RT-PCR) and pyrosequencing were used to detect the mRNA and promotor methylation of LATS2 gene in 72 OSCC specimens and normal oral mucosa tissues. Western blotting was used to detect the LATS2 protein in six OSCC specimens and normal oral mucosa tissues.@*Results@#All cases had expression of LATS2 mRNA in normal oral mucosa tissues, but the expression was down-regulated significantly, only 47% (34/72) in 72 cases of OSCC showed LATS2 mRNA expression. The expression was correlated with the degree of tumor differentiation and lymph node metastasis (P<0.05). The results of pyrosequencing show that 68% of promotor methylation (49/72) in 72 cases of OSCC. Furthermore, there was significant correlation between the mRNA and promotor methylation of LATS2 gene (χ2=16.980, P<0.01). All the six specimens had the low LATS2 protein expression.@*Conclusions@#The promotor methylation of LATS2 gene may play an important role in the occurrence of OSCC.

Differential Expression of Transcriptional Variants of XAF1 in Colorectal Neoplasms / 胃肠病学

Background:The tumor suppressor,X-linked inhibitor of apoptosis(XIAP)-associated factor 1(XAF1)is a XIAP-binding protein that antagonizes the anti-caspase activity of XIAP,thereby enhancing apoptosis. Transcriptional variants of XAF1 have been detected in various tumor cells,however,the expression profile of these transcriptional variants in colorectal neoplasms remains unclear. Aims:To investigate the expressions of XAF1 and its transcriptional variants in different colorectal tissues and their roles in tumorigenesis and development of colorectal neoplasms. Methods:Samples of colorectal cancer and paired adjacent tissue,hyperplastic polyp,adenomatous polyp,and normal colorectal mucosa were collected from surgical operation or endoscopic biopsies. XAF1 protein expression was detected by immunohistochemistry and Western blotting,and the transcriptional variants of XAF1 were detected by RT-PCR. Results:Compared with normal colorectal mucosa,the expression level of XAF1 protein in nucleus was significantly reduced( P 0. 05)in hyperplastic polyp,adenomatous polyp,and cancerous tissue,and the overall expression level of XAF1 protein was decreased(P <0. 05). XAF1A protein expression in cancerous tissue was significantly reduced when compared with the paired adjacent tissue(P < 0. 05). mRNA expressions of three transcriptional variants of XAF1,XAF1A,XAF1B and XAF1C were all significantly lower in neoplastic tissues than in normal mucosa(P < 0. 05). Conclusions:XAF1 and its transcriptional variants are differentially expressed in colorectal neoplasms and normal colorectal mucosa. These changes occurred initially in adenomatous polyp accompanied by a redistribution of XAF1 from nucleus to cytoplasm. Post-transcriptional modification may affect XAF1 gene function.

The construction of human prostate specific homeobox gene NKX3.1 eukaryotic expression vector and preliminary study on the biological function of NKX3.1 / 中国医师杂志

Objective To investigate the basic biological functions of NKX3.1 with construction of a series of eukaryotic expression vector of NKX3.1 to study its effects on cell cycle and apoptosis.Methods The full-length reading frames (ORF) of NKX3.1 was amplified from normal human prostate tissue with polymerase chain reaction (PCR),the ORF was cloned into T vector,and then NKX3.1 was cloned into eukaryotic expression vector pcDNA3.1 (+) and pcDNA3.1 (-) with this T vector as template.NKX3.1 in pEGFP C1 was transfected into PC3 cell line,and C1 pEFP was taken as control to observe the localization of NKX3.1 in cells.At the same time,NKX3.1 in pcDNA3.1 and pcDNA3.1 were transfected into PC3 cells and the cells were collected after 24 ～48 hours to detect cell cycle and apoptosis by flow cytometry.Results The eukaryotic expression vector of NKX3.1 was constructed successfully.Fluorescent protein was ocated in the nucleus after transfection of NKX3.1 in pEGFP C1,but pEGP C1 was both expressed in nucleus and cytoplasm.There was significant effect on the early apoptosis (P＜0.01),but no effect on the cell cycle (P ＞ 0.05) after transfection of NKX3.1 compared to PC3 cell-transfected with empty vector of pcDNA3.1.Conclusions The result data suggest that NKX3.1 be nuclear protein and have effect on the early apoptosis of PC3 cell line based on the construction of eukaryotic expression vector.

MicroRNA-143 inhibits proliferation and migration as well as invasion in esophageal cancer cell line ECA109 / 国际肿瘤学杂志

Objective To investigate the functions of microRNA-1 43 (miR-1 43)in esophageal cancer cell line ECA1 09.Methods ECA1 09 cells were transfected with negative control (NC),miR-1 43 mimics or miR-1 43 inhibitors.3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT)assay was per-formed to evaluate the growth of ECA1 09 cells after transfection.Annexin V-FITC /PI apoptosis test kit was used to detect early apoptosis rate in ECA1 09 cells.Transwell migration and invasion assays were conducted to compare the migration and invasion capacity of ECA1 09 among different groups.Real-time PCR and Western blotting were used to analyze the mRNA and protein alteration after transfection.Results Three and four days after transfection,compared with NC (absorbance value:0.90 ±0.02 and 1 .09 ±0.07),miR-1 43 mimics inhibited ECA1 09 cell proliferation (absorbance value:0.66 ±0.05 and 0.80 ±0.04),while miR-1 43 inhibi-tors promoted cell proliferation (absorbance value:1 .1 3 ±0.09 and 1 .51 ±0.08),with statistical signifi-cances (F =49.1 6,P =0.000;F =1 00.34,P =0.000).Early-stage apoptosis rates of ECA1 09 transfected with NC,miR-1 43 mimics and miR-1 43 inhibitors were 3.42% ±0.72%,1 1 .63% ±1 .1 5% and 0.94% ± 0.1 0%,respectively,with statistical significance (F =1 51 .61 ,P =0.000).Meanwhile,compared with NC (migration cell number:336 ±1 3,invasion cell number:1 47 ±1 6),miR-1 43 mimics inhibited cell migration (1 48 ±1 6)and invasion (75 ±1 0),while miR-1 43 inhibitors promoted cell migration (51 0 ±1 4)and inva-sion (238 ±1 6),with statistical significances (F =470.99,P =0.000;F =90.04,P =0.000).Compared with NC (1 .00 ±0.00),miR-1 43 mimics down-regulated mRNA (relative expression level 0.22 ±0.08)and protein expression (relative expression level 0.46 ±0.08)of K-ras,whereas miR-1 43 inhibitors up-regulated mRNA (1 .55 ±0.1 2)and protein expression (1 .33 ±0.05)of K-ras (F =1 31 .36,P =0.000;F =88.1 7, P =0.000).Conclusion miR-1 43 functions as a tumor suppressor in esophageal cancer cell line ECA1 09, probably by down-regulating K-ras expression.

Research on tumor suppressor mechanisms of maternally expressed gene 3 / 国际外科学杂志

As long non-coding RNA (LncRNA) research boom,Maternally Expressed Gene 3(MEG3) as LncRNA family is also a widespread concern.MEG3 not been studied in benign disease,and malignant disease more and more in-depth research.MEG3 because of the uniqueness of the tumor suppressor much attention in cancer research,but its specific mechanism of action of tumor suppressor and associated pathways have not been yet entirely clear,remains to be further research and clarify.This article will be now anticancer activity MEG3 and related Pathway summarized.

Research progress of the relationship of tumor suppressor genes and autophagy in ovarian cancer / 中国医师杂志

Autophagy is associated with the occurrence,development and drug resistance of ovarian cancer,which has become a hot topic in ovarian cancer.Many scholars believe that cancer is closely associated with tumor suppressor genes,and some tumor suppressor genes are related to autophagy.This article will review the effects of tumor suppressor genes on ovarian cancer through autophagy at home and abroad,which provides the reference for clinical research.

SOX7 and its expression and function in tumors / 国际肿瘤学杂志

SOX7 belongs to the SOX gene family.And it has been shown to regulate multiple biological processes.Studies have found that SOX7 gene is likely to be a tumor suppressor gene.In many tumors,SOX7 downregulation that inhibits proliferation,migration and invation of tumor via regulating the Wnt-β-catenin signaling pathway mediated the transcription process,which plays a significant role in tumorigenesis.

Expression and clinical significance of stem cell marker Sox2 in human gastric cancer / 天津医药

Objective To detect the expression of stem cell marker Sox2 in gastric cancer (GC). Methods The mRNA and protein expressions of Sox2 in paired primary tumor tissues and their matching, adjacent non-cancerous tissues in a series of 60 cases of human GC were examined by reverse transcription-PCR (RT-PCR) and immunohistochemistry (IHC). χ2 test was used to analyze the correlation of Sox2 expression with clinicopathological parameters of GC tissues including age, gender, tumor size, histological type, TNM stage, differentiation degree, depth of invasion and lymph node metastasis. Results RT-PCR results showed that the positive rate of Sox2 expression was significantly increased in gastric tumor tissues (53.3%, 32/60) compared with that of matching, adjacent non-cancerous tissues (20.0%, 12/60, P<0.01). Semi-quantitative analysis showed that the relative intensity of Sox2 mRNA expression was significantly higher in gastric cancer tissues (0.724±0.209) than that in tissues adjacent to carcinoma (0.256±0.065,P<0.01). The positive expression of Sox2 was significantly higher in gastric tumor tissues (50.0%, 30/60) than that of matching, adjacent non-cancerous tissues (16.7%, 10/60,P<0.01). The positive expression of Sox2 was significantly higher in gastric tumor patients with TNM stage (Ⅲ+Ⅳ) than that of TNM stage (Ⅰ+Ⅱ). The positive expression of Sox2 was significantly higher in gastric tumor patients with low differentiation and undifferentiated tumor cells than that of patients with middle and high differented cells. The positive expression of Sox2 was also significantly higher in gastric tumor patients with the depth of invasion T3-T4 than that of patients with T1-T2. The positive expression of Sox2 was significantly higher in gastric tumor patients with lymph node metastasis than that of patients without lymph node metastasis (P<0.05 or P<0.01). Conclusion The elevated expression of Sox2 is associated with the initiation, invasion, progression, and metastasis of GC. Sox2 may serve as a novel diagnostic and therapeutic marker for human GC.

Effects of miR-506 on malignance phenotypes of hepatocellular carcinoma cells / 天津医药

Objective To investigate effects of microRNA-506 (miR-506) on malignant phenotypes of hepatocellular carcinoma (HCC) cells, including cellular viability, proliferation and invasion. Methods HCC cell lines HepG2 and QGY-7703 were served as model. Five experimental groups were established in this study, including cell control, pcDNA 3 blank vector control, miR-506 over-expression, pSIH1 blank vector control and miR-506 suppression groups. Real-time reverse transcription PCR assay was performed to measure miR-506 level. CCK-8, colony formation and Transwell assays were performed to detect viability, colony formation activity and invasion activity of HCC cell lines, respectively. Effects of miR-506 on these indexes were evaluated. Results In HepG2 and QGY-7703 cell lines, miR-506 level increased in the miR-506 over-expression group (P0.05). Conclusion miR-506 plays a tumor suppressor role in HCC cells by inhibiting cell viability, colony formation and invasion.

Role of PTEN protein in spinal cord neurons in diabetic neuropathic pain in rats / 中华麻醉学杂志

Objective To investigate the role of phosphatase and tensin homologue deleted on chromosome 10 (PTEN) protein in the spinal cord neurons in diabetic neuropathic pain (DNP) in rats.Methods Male Sprague-Dawley rats,aged 2 months,weighing 180-200 g,were studied.Diabetes mellitus was induced by single intraperitoneal injection of streptozotocin (STZ) 60 mg/kg.Sixteen rats with DNP were randomly divided into 2 groups (n =8 each) using a random number table:DNP group and DNP+PTEN inhibitor bpv (pic) group (DPN-bpv group).Another 16 rats were equally and randomly divided into either control group (group C) or bpv group.In DNP-bpv and bpv groups,bpv (pic) 0.2mg/kg was injected intraperitoneally once a day within 14-28 days after injection of STZ.Before STZ injection (T1),and at 2,7,14,21 and 28 days after STZ injection (T2-6),the mechanical paw withdrawal threshold (MWT) was measured.After measurement of MWT,the rats were sacrificed,and the lumbar segments of the spinal cord (L4.5) were removed for determination of PTEN protein activity (by ELISA) and Akt (s473) phosphorylation (by Western blot).Results Compared with group C,the MWT was significantly decreased at T4-6,and the PTEN protein activity and Akt (s473) phosphorylation were significantly increased in DNP and DNP-bpv groups (P＜0.05 or 0.01).Compared with group DNP,the MWT was significantly increased at T6,and the PTEN protein activity and Akt (s473) phosphorylation were significantly decreased in group DNP-bpv (P＜0.05).Conclusion PTEN protein in the spinal cord neurons is involved in the maintenance of DNP in rats.

An exprimental study on AZD5363 suppressing cholangiocarcinoma cells / 中华普通外科杂志

Objective To investigate the effect of Akt pathway inhibitor AZD5363 on cell proliferation and invasion of QBC939 and RBE cholangiocarcinoma cells and the mechanism.Methods Western blotting was used to detect Akt and downstream protein and mTOR protein expression in two cancer cell lines after process by AZD5363.Inhibition rate and cytotoxicity was tested by CCK-8 assay,and Transwell assay was used to evaluate the invasive ability of cancer cells.Results QBC9393 cell exposed to AZD5363 LD50 drug concentration (24 ±9) was significantly different compared with control group (t =4.47,P ＜ 0.05),RBE cells LD50 drug concentration (21 ± 8) was significantly different compared with control (t =4.41,P ＜ 0.05).Tumor invasion capacity of QBC939 in drug concentrations of 20 μmol/L (63 ± 12) and 0 μmoL/L (271 ± 27),the difference was statistically significant.RBE exposed AZD5363 upon drug concentrations of 20 μmol/L (58 ± 23) and 0 μmol/L (235 ± 21),the difference was statistically significant.AZD5363 promotes phosphorylation of mTOR in QBC939.Conclusions AZD5363 inhibits the proliferation and migration,inhibiting the phosphorylation of Akt and its downstream molecules.AZD5363 promotes phosphorylation of mTOR in QBC939.

Effect of miRNA-218 on renal cell carcinoma in nude mice / 肿瘤研究与临床

Objective To explore the effects of miRNA-218 on renal cell carcinoma of nude mice in vivo.Methods The pcDNA3.1-miR-218 and its control negative plasmids were stably transfected into renal cell carcinoma cell line A498 and 769-P.These cells were inoculated into nude mice in different groups to observe the changes of body and tumor and to detect the expression of miR-218 in the tissues of nude mice.Results In the A498 cells + pcDNA3.1-miR-218 transfected group,the weight loss of tumor bearing nude mice after 25 days was lower than that in the control group,and the tumor volume was smaller than that in the control group after 10 days (P ＜ 0.05).In the 769-P cells + pcDNA3.1-miR-218 transfected group,the weight loss of tumor bearing nude mice was lower than that in the control group after 19 days,and the tumor volume was smaller than that in control group after 10 days (P ＜ 0.05).The expression of miRNA-218 in bearing nude mice with A498 cells or 769-P cells transfected by miRNA-218 was significantly higher than that in the control group,and the difference was statistically significant (P ＜ 0.05).Conclusion Up-regulation of miRNA-218 expression can inhibit the growth of renal cell carcinoma of nude mice in vivo.

Advances in Study on CMTM3 and CMTM7 in Tumors of Gastrointestinal Tract / 胃肠病学

CMTM3 and CMTM7 are two newly discovered anti-oncogenes,which exist in various kinds of organs and tissues and having multiple biological functions including cell proliferation,differentiation,migration,and apoptosis. Recently,it has been shown that these two anti-oncogenes have closely relationship with gastrointestinal tract tumor,which can inhibit the growth of esophageal,gastric,and colorectal cancer. In this review article,the advances in study of the relationship between these two anti-oncogenes and tumors of gastrointestinal tract were summarized.

Functional mechanism of SIRT1 gene in tumor / 国际肿瘤学杂志

Sirtuin 1 (SIRT1),the Ⅲ class deacetylation enzyme,is a kind of NAD + dependent histone deacetylation enzyme.The role of SIRT1 in tumor has the duality.It can inhibit inflammation,tumor angiogenesis and interact with tumor related gene to inhibit tumor development.However,it can also regulate tumor related genes,and epithelial-mesenchymal transition,promote tumor cell proliferation and tolerance of radiotherapy and chemotherapy,and maintain the stemness of cancer stem cells to promote tumor proliferation,invasion and metastasis.