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@#[Abstract] Objective: To investigate the effect and mechanism of miR-449b-5p on the proliferation of ovarian cancer cells. Methods: Cancer tissue and corresponding para-cancerous tissue specimens from 20 patients who underwent surgery in the Department of Obstetrics and Gynecology of Sichuan Provincial People's Hospital from June 2018 to June 2020 were collected for this study; in addition, normal ovarian epithelial cell line (HOSEpiC) and six human cervical cancer cell lines (SKOV3, ES-2, OVCAR-3, HO8910, CaOV-3 and A2780) were also selected. mRNA expressions of miR-449b-5p and CCNE2 in ovarian cancer tissues and cells were detected by qPCR. The plasmids miR-NC, miR-499b-5p mimic, miR-499b-5p inhibitor and pc-CCNE2 were transfected into SKOV3 cells separately or in combination. Cell growth and cell cycle were measured by the CCK-8 method and Flow cytometry, the expression of CCNE2 protein was detected by WB assay, respectively. The targeting relationship between miR-449b-5p and CCNE2 was verified by Dual luciferase reporter assay. miR-499b-5p transfected SKOV3 cells were injected subcutaneously in nude mice to construct xenograft model, and the tumor volume was measured weekly. Nude mice were sacrificed at day 42. The weight of the subcutaneous tumors was weighed by an electronic balance, and the expressions of CCNE2 and Ki67 were detected by immunohistochemistry. Results: Compared with normal ovarian tissues and epithelial cell line HOSEpiC, miR-499b expression was significantly downregulated in human cervical cancer tissues and cell lines SKOV3, ES-2, OVCAR-3, HO8910, CaOV-3 and A2780 (P<0.01). Compared with the Control group, the proliferation of SKOV3 cells in the miR-499b mimic group was significantly reduced (P<0.01) and the cell proportion in G0/G1 phase was significantly increased ( P<0.01); while the proliferation of SKOV3 cells in the miR-499b inhibitor group was significantly increased (P<0.01) and the cell proportion in G0/G1 phase was significantly reduced (P<0.01). Over-expression of miR-499b-5p significantly inhibited the luciferase activity of wild type CCNE2 plasmid (P<0.01) but had no effect on the luciferase activity of the mutant CCNE2 plasmid. Compared with the miR-499b mimic group, the growth of SKOV3 cells in the miR-499b mimic+pc-CCNE2 group was significantly increased (P<0.01) and the cell proportion in G0/G1 phase was significantly reduced (P<0.01). Compared with the miR-NC group, the tumor volume and weight of nude mice in the miR-499b mimic group were significantly reduced (all P<0.01), and the proportion of CCNE2 and Ki67 positive cells was significantly decreased (P<0.01). Conclusion: miR-449b-5p inhibits the growth and cell cycle progression of ovarian cancer cells by targeting Cyclin E2.
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OBJECTIVES@#To explore the expression of autophagy related genes 5 (ATG5) and cyclin E in coronary heart disease (CHD) and its clinical significance.@*METHODS@#From April 2018 to August 2018, 80 patients diagnosed with CHD in the Second Xiangya Hospital, Central South University were selected as an observation group, and another 80 healthy subjects were selected as a control group. The expression of ATG5 and cyclin E mRNA in nucleate cells and the plasma protein in the 2 groups were detected and analyzed. The model of macrophage-derived foam cells induced by oxidized low density lipoprotein (ox-LDL) was used to simulate atherosclerosis. The proliferation of macrophage- derived foam cells and the protein levels of ATG5 and cyclin E induced by ox-LDL at different concentrations were examined.@*RESULTS@#Compared with the control group, the levels of ATG5 mRNA and protein in the blood in the observation group were decreased, and the cyclin E mRNA and protein levels were increased, there were statistically difference (both <0.05). Receiver operating characteristic (ROC) curve showed that the area under curve (AUC) of ATG5 mRNA, cyclin E mRNA, ATG5 protein and cyclin E protein were 0.739, 0.780, 0.671 and 0.807, respectively. Pearson analysis showed that the ATG5 mRNA was negatively correlated with the cyclin E mRNA (=-0.734, <0.05),while the plasma ATG5 protein was negatively correlated with the plasma cyclin E protein (=-0.746, <0.05). Macrophage-derived foam cell model induced by ox-LDL showed that the proliferation of foam cells and the expression levels of cyclin E protein were increased in a concentration and time-dependent manner, and the expression levels of ATG5 protein were decreased in a concentration-dependent manner.@*CONCLUSIONS@#The levels of ATG5 mRNA and protein are lowly expressed while the levels of cyclin E mRNA and protein are highly expressed in the patients with CHD.The ATG5 protein levels are lowly expressed in ox-LDL-treated macrophage-derived foam cells while the cyclin E protein levels are highly expressed in ox-LDL-treated macrophage-derived foam cells. Based on these observations, we conclude that ATG5 inhibits the degradation of the cyclin E and promotes the proliferation of macrophages, involving in the occurrence and development of CHD.
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Humans , Autophagy , Autophagy-Related Protein 5 , Coronary Disease , Cyclin E , Foam Cells , Lipoproteins, LDLABSTRACT
Background: Gestational trophoblastic disease (GTD) constitutes a spectrum of tumors and tumor-like conditions, characterized by proliferation of pregnancy-associated trophoblastic tissue of progressive malignant potential. It is very difficult to differentiate these complex groups of lesions basing on histomorphology alone. Immunohistochemistry (IHC) with cyclin E, P63, and Ki-67 has a definite role in the identification of different trophoblasts and entities of GTD and also in the determination of biological behavior. Aims: The aim of this study is to find the differential expression of cyclin E, p63, and Ki-67 in normal placenta, hydropic abortus (HA), and various entities of GTD. Design and Settings: A prospective case–control study conducted in a government medical college. Methods: Total 96 cases, divided into Group A (48 histologically confirmed cases of GTD) and Group B (controls comprising 8 HA and 40 normal placentas of different trimesters), were studied. The histological samples were subjected to IHC using cyclin E, Ki-67, and p63. Statistical Analysis: Results were analyzed using SPSS statistical method. Results: Among the three immunomarkers used, Cyclin E and Ki-67 show statistically significant difference (P < 0.05) when compared between GTD and control groups, but it was insignificant for p63 (P = 0.369). Strong staining intensity of cyclin E and Ki-67 is seen in complete moles, choriocarcinoma, and placental site trophoblastic tumor. Conclusion: This study was done to evaluate the role of cell cycle regulatory proteins such as cyclin E and p63 and proliferation marker Ki-67 in the detection of various trophoblasts and differential diagnosis of the lesions associated with them.
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Objective To investigate the expressions of metallothionein-2A (MT-2A), E-cadherin, interleukin-6 (IL-6), cyclin E, proliferating cell nuclear antigen (PCNA) and bcl-2 in prostate cancer tissues and their correlation with biochemical recurrence of prostate cancer. Methods Tissue specimens from 128 cases of prostate cancer who underwent radical prostatectomy in Shanxi Dayi Hospital from October 2012 to October 2017 were processed and transferred into tissue microarrays, the clinicopathological parameters of patients were also recorded. The expression levels of MT-2A, E-cadherin, IL-6, cyclin E, PCNA and bcl-2 were detected by immunohistochemical avidin-biotin complex (ABC) staining. The correlation between different molecular markers and biochemical recurrence of prostate cancer was analyzed. Results The biochemical recurrence rate of 128 patients with prostate cancer was 30.5％ (39/128). The biochemical recurrence rates of low-risk, intermediate-risk and high-risk prostate cancer patients were 14.8％(8/54), 38.7％(24/62) and 58.3％ (7/12), respectively. The risk classification and pathological T stage of patients with prostate cancer were associated with the expressions of MT-2A, cyclin E, IL-6 and E-cadherin (all P< 0.05). Multivariate Cox risk model showed that the high risk classification (HR= 1.81, 95％CI 1.56-2.19, P=0.042), MT-2A positive expression (HR= 2.01, 95％CI 1.08-3.15, P= 0.005), cyclin E positive expression (HR= 1.79, 95％CI 1.08-2.21, P= 0.042) and E-cadherin negative expression (HR= 1.92, 95％ CI 1.22-2.45, P= 0.020) were the independent risk factors for biochemical recurrence of prostate cancer. Conclusion The expression of MT-2A, cyclin E and E-cadherin may serve as independent predictors for biochemical recurrence of prostate cancer.
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Objective The aim of this study was to investigate the expressions of and clinical significance of F-box/WD-40 domain protein 10(FBXW10) as well as the expression of cell cycle protein cyclin E( cyclin E) in renal clear cell carcinoma. Methods Immunohistochemistry SP method was used to detect the expressions of FBXW10 and cyclin E protein in 60 cases of renal clear cell carcinoma and 20 cases of adjacent normal tissues. The relationship between the expressions of FBXW10 and cyclin E,and the clinical pathological characteristics was analyzed. Results The expression rates of FBXW10 and cyclin E protein in renal clear cell carcinoma were 40. 0% ,70. 0% ,respectively and adjacent normal tissues were 55. 0% and 25. 0% ( P<0. 05). The expression of FBXW10 was correlated with the histologic grade of renal clear cell carcinoma(P=0. 041),histologic grade( P=0. 030);the ex-pression of cyclin E was correlated with the pathological tumor stage of clear cell renal cell carcinoma(P=0. 005),degree of differen-tiation(P=0. 035),and distant metastasis(P=0. 011). There was a significant correlation between the expressions of FBXW10 and cyclin E in renal clear cell carcinoma(r=0. 533,P<0. 001). Conclusion FBXW10 and cyclin E may play important roles in the development of renal clear cell carcinoma.
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Objective:To explore the relationship between the expression of p57KIP2,cyclin D1,and cyclin E receptors in male breast can-cer(MBC)and its clinical significance.Methods:Data of MBC cases diagnosed in The First Affiliated Hospital of Wenzhou Medical Uni-versity between January 2000 and December 2016 were reviewed.Forty cases of infiltrating ductal carcinoma(IDC)and 20 cases of male ductal carcinoma in situ(DCIS)were selected,and 20 cases of gynecomastia(GYM)were selected as controls.The expression of p57KIP2,cyclin D1,and cyclin E mRNA and protein in the tissue samples obtained from IDC,DCIS,and GYM cases were measured by re-verse transcription polymerase chain reaction and immunohistochemistry,respectively.Results:The expression of p57KIP2mRNA in IDC was 0.18±0.07,which was lower than that in DCIS(0.42±0.05)and GYM(0.75±0.04).The rate of p57KIP2positivity in IDC was 25%(10/40),which was lower than that in DCIS 60%(12/20)and GYM 90%(18/20).There were significant differences in the expression of p57KIP2mRNA and protein among the three groups(P<0.05).The expression of cyclin D1 and cyclin E mRNA in IDC was 0.92±0.12 and 0.96±0.08,which was higher than that in DCIS(0.72±0.06,0.64±0.01)and GYM(0.38±0.03,0.21±0.02),respectively.Cyclin D1 and cy-clin E protein positive rates in IDC were 90%(36/40)and 88%(35/40),which were higher than those in DCIS[80%(16/20),85%(17/20)],and GYM[25%(5/20),20%(4/20)].In IDC tissues,the expression of p57KIP2,cyclin D1,and cyclin E proteins was associated with the clinical stage and histological grade(P<0.05),and the expression of p57KIP2protein was correlated with axillary node metastasis(P<0.05).There was a negative correlation between the expression of p57KIP2and cyclin D1 and between p57KIP2and cyclin E.However,the correlation between cyclin D1 and cyclin E expression was positive(P<0.05).Conclusions:p57KIP2,cyclin D1,and cyclin E may play an im-portant role in the development and progression of MBC.Combined clinicopathological detection of p57KIP2,cyclin D1,and cyclin E can aid future research on MBC.
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Objective To investigate the effects of β2-adrenergic antagonist ICI118 ,551 on pancreatic cancer cell G1/S phase arrest and its action mechanism .Methods The cell cycle indexes were determined by the flow cytometry assay ;the expressions of Cyclin D1 and Cyclin E were analyzed by Western blot ;the activation of NF-κB was measured by electrophoretic mobility shift assay ;the proliferation of PanCa cells was determined by BALB/c athymic nude mice subrenal capsular assay .Results β2-adrenergic antagonist ICI118 ,551 significantly induced G1/S phase arrest compared with β1-adrenergic antagonist metoprolol in MIA PaCa-2 and BxPC-3 cell lines .ICI118 ,551 inhibited the expressions of Cyclin D1 and Cyclin E and reduced the activation of NF-κB .The proliferation of PanCa cells was strongly suppressed in the renal capsule xenografts in mice after ICI 118 ,551 treatment .Conclusion The blockage ofβ2-adrenoceptor markedly induces PanCa cells to arrest at G1/S phase and inhibits the proliferation of pancreatic cancer cells .
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Objecive:To prove the molecular mechanisms of Mahkota Dewa (Phaleria macrocarpa) in suppressing proliferation of human retinoblastoma cells through suppression of cell cycle's gene-rcgulators expression.Methods:In this study,the molecular mechanism of anti-tumor effect of fractioned extract of Phaleria macrocarpa (DLBS1425) in human retinoblastoma cells Y-79 was investigated by measuring the tumor cells viability,the assessment of population profiles of tumor cells in the cell cycle,and the mRNA concentration of pi6,p21,p53,cyclin D,cyclin E,and E2F.Results:DLBS1425 showed an inhibition effects towards proliferation of Y-79 cell line.Inhibition of proliferation was shown by suppression of cell cycle progression.DLBS1425 downregulated cyclin E,a G1 phase regulator gene of cell cycle,in dosedependent manner without affecting p53-p21 pathway.In the other word,DLBS1425 inhibits cell proliferation through suppression of cyclin E independently towards conventional proliferation pathway.Conclusions:Our results suggest that DLBS 1425 is a potential anticancer agent which targets genes involved in cell proliferation in human retinoblastoma cells which make it pharmacologically ideal for the prevention and/or treatment of retinoblastoma cancer.
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Objective To prove the molecular mechanisms of Mahkota Dewa (Phaleria macrocarpa) in suppressing proliferation of human retinoblastoma cells through suppression of cell cycle's gene-regulators expression. Methods In this study, the molecular mechanism of anti-tumor effect of fractioned extract of Phaleria macrocarpa (DLBS1425) in human retinoblastoma cells Y-79 was investigated by measuring the tumor cells viability, the assessment of population profiles of tumor cells in the cell cycle, and the mRNA concentration of p16, p21, p53, cyclin D, cyclin E, and E2F. Results DLBS1425 showed an inhibition effects towards proliferation of Y-79 cell line. Inhibition of proliferation was shown by suppression of cell cycle progression. DLBS1425 downregulated cyclin E, a G1 phase regulator gene of cell cycle, in dose-dependent manner without affecting p53–p21 pathway. In the other word, DLBS1425 inhibits cell proliferation through suppression of cyclin E independently towards conventional proliferation pathway. Conclusions Our results suggest that DLBS1425 is a potential anticancer agent which targets genes involved in cell proliferation in human retinoblastoma cells which make it pharmacologically ideal for the prevention and/or treatment of retinoblastoma cancer.
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Objective: To study the level of squamous cell antigen (SCC?Ag) and cyclin E in cervical intraepithelial neoplasia ( CIN) and cervical cancer, and to explore the clinical significance. Methods: From Nov 2012 to Nov 2015, 308 patients with CIN or cervical cancer were chosen as research objects, and 170 patients with uterine leiomyoma or uterine gland muscle disease for hyster?ectomy and after pathological examination of the normalcases were chosen as control group. The SCC?Ag level, positive expression rate in blood, and positive expression of Cyclin E in cervical tissue for patients with different cervical lesions were compared. Results: The SCC?Aglevel , positive expression rate in blood, and positive expression of Cyclin E in cervical tissue for patients with cervical canc?er, CIN were higher that those in the control group ( P<0?05) . The SCC?Aglevel, positive expression rate in blood, and positive ex?pression of Cyclin E in different CIN grades and different stages of cervical cancer patient had significant difference ( P<0?05) . Con?clusion: Blood SCC?Ag level and positive expression, Cyclin E positive expression in the cervical tissue have a close relationship with occurrence and development of CIN and cervical cancer .
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AIM:To investigate the effects and mechanisms of microRNA-25 (miRNA-25) on the proliferation of human esophageal squamous-cell carcinoma cell line TE1.METHODS: The abundance of miRNA-25 in different tis-sues was measured by RT-PCR.After silencing or over-expression of miRNA-25 with mimics or inhibitor in TE1 cells, the cell proliferation, cell cycle distribution and the expression of cyclin E1 and cyclin-dependent kinase 2 (CDK2) at mRNA and protein levels were measured by CCK-8 assay, BrdU detection, flow cytometry, RT-PCR and Western blot, respective-ly.RESULTS:miRNA-25 was prominent in esophageal mucosal tissue and highly expressed in TE1 cells (P<0.05).O-ver-expression of miRNA-25 increased TE1 cell proliferation, promoted the cell cycle progression and enhanced the en-trance of the cells into S phase (P<0.05).Inverse results were obtained after down-regulation of miRNA-25 (P<0.05). Furthermore, the expression of cyclin E1 and CDK2 at mRNA and protein levels was significantly increased after over-ex-pression of miRNA-25, but decreased after down-regulation of miRNA-25 (P<0.05).CONCLUSION: miRNA-25 en-hances cell cycle transition by increasing the expression of cyclin E1 and CDK2, thus accelerating TE1 cell proliferation. This study provides a novel mechanism by which miRNA-25 increases the proliferation of human esophageal squamous-cell carcinoma cell line TE1, suggesting that down-regulation of miRNA-25 may be a potential new therapeutic strategy for trea-ting esophageal squamous-cell carcinoma.
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Objective To evaluate the relationship between the CCNE1 or RIP2, identified at a single nucleotide poly?morphism, and the risk, clinic stage and pathological grade of bladder cancer. Methods Peripheral venous blood samples were obtained from 176 patients with bladder cancer and 210 controls without cancer. DNA was extracted. Polymerase chain reaction (PCR) method was used to detect CCNE1 (rs8102137) and RIP2 (rs42490) polymorphism. According to the postoper?ative pathological results, patients with bladder cancer were determined the grading and staging. The genotype differences of medium gene and the distribution gene were analyzed and compared in bladder cancer group and control group. The relation?ship of CCNE1 (rs8102137) and RIP2 (rs42490) genotypes and clinical data of patients with bladder cancer was analyzed, and the relationship of them with the genetic susceptibility to bladder cancer was also analyzed. Results The genotype dis?tribution was with good group representative in control group. The frequency of CCNE1(rs8102137) variant allele was signifi?cantly higher in bladder cancer group (40.91%) than that of control group (30.95%,OR=1.54,95%CI:1.02-2.45, P<0.05). The frequency of RIP2 (rs42490) variant allele was significantly higher in bladder cancer group (72.73%) than that of control group (62.38%, OR=1.61, 95%CI:1.04-2.48, P<0.05). There were no significant differences in gene polymorphisms of CC?NE1(rs8102137) and RIP2 (rs42490) between different pathological grades and different clinical stages of bladder cancer. Conclusion The CCNE1 (rs8102137) and RIP2 (rs42490) polymorphism have interaction in occurrence of bladder cancer process. There is higher risk of bladder cancer in individuals carrying mutant alleles than that of individuals carrying wild type.
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Objective:To observe the expression of the tumor suppressor gene (P53),apoptosis signal receptor (Fas),tumor necrosis factor alpha ( TNF-α) and Cyclin E ( Cyclin E) in serum and cancer tissues with papillary thyroid cancer patients ,and explore their relationship with the clinical pathology characteristics of thyroid papillary carcinoma .Methods:The puncture diagnosis in patients with papillary thyroid carcinoma as the experimental group (n=74),physical examination of healthy people as the normal control group (n=26).The two groups were fasting venous blood samples ,the experimental group in postoperative specimens from cancer tissue , adjacent normal tissue and 7 days after the fasting venous blood was sampled again.Protein content of P53,Fas,TNF-αand Cyclin E was detected by ELISA in serum , cancer adjacent normal tissue and cancer tissue;using real-time fluorescent quantitative assay to observe the gene expression of P53,Fas,TNF-αand Cyclin E in thyroid papillary carcinoma and adjacent normal tissues ; protein expression by immunohistochemical methods in papillary thyroid carcinoma and adjacent normal tissues P 53,Fas,TNF-αand Cyclin E analysis;the clinical expression with papillary thyroid cancer staging , pathological Type and has no relationship to lymph node metastasis.Results:The protein concentration in serum of patients with papillary thyroid carcinoma P 53 , Fas and TNF-αwere significantly lower than that of the normal control group ,Cyclin E protein content was significantly higher than that of normal control group ,the differences were statistically significant (P<0.01);thyroid papillary carcinoma P53,Fas and TNF-αprotein content,protein expression strength and gene expression levels were significantly lower than the normal tissues adjacent to cancer ,protein content ,Cyclin E protein expression and gene expression intensity was significantly higher than that in normal tissues ,the difference was statistically significant (P<0.05).Conclusion:The expression of p53,Fas and TNF-αin papillary thyroid carcinoma lower and expression level of Cyclin E increase ,may play an important role in papillary thyroid cancer invasion and metastasis.Combined detection of the four can be used as markers for early diagnosis of papillary thyroid cancer ,enhance the rate of early diagnosis of thyroid papillary carcinoma.
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Objective To investigate human cell division control protein 4(hCDC4) expression and its correlation with the clini‐copathological features in oral squamous cell carcinoma(OSCC) .Methods We freshly collected 52 samples of surgically resected OSCC tissues and 12 samples of normal tissues .hCDC4 expression in the samples was detected by immunohistochemical staining . The correlation between hCDC4 protein expression and clinicopathological feature was analysed .OSCC cells and Tca8113 were transfected with hCDC4‐siRNA ,cell proliferation and c‐Myc and Cyclin E protein expression were determined by using M TT and Western blot .Results The hCDC4 protein expression in normal tissues was significantly up‐regulated compared to those in OSCC tissues (83 .3% vs .25 .0% ,P < 0 .05) .Clinicopathological analysis revealed that reduced hCDC4 expression was associated with large tumor size ( ≥ 4 cm) and high clinic stage ( Ⅲ + Ⅳ ) (P< 0 .05) .hCDC4 knockdown by siRNA led to increased cell prolifera‐tion and c‐Myc and Cyclin E protein accumulation in Tca8113 cells .Conclusion Loss of hCDC4 may promote tumor progression by resulting in c‐Myc and Cyclin E protein accumulation in OSCC .
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Background and purpose:The transcription factor PAX6 is primarily expressed in embryos. PAX6 is also expressed in several tumors and plays oncogenic or tumor suppressor role. This study aimed to investigate the expression of PAX 6 in non-small cell lung cancer (NSCLC) tumor samples and cell lines; and evaluate the effects of PAX6 on the proliferation and invasion of tumor cells and the expression level of cyclin E and p38.Methods:Western blot was carried out to detect the PAX6 protein level in 86 NSCLC tumor tissues, paired adjacent normal tissues and 2 cell lines. PAX6 siRNA was transfected into human lung cancer A549 cell line. Anchorage-independent growth and invasiveness of tumor cells were measured by MTT and transwell cell invasion assay, respectively. Cyclin E and p38 protein level before and after transfection were detected by western blot.Results:Comparison with tumor adjacent tissues and normal human bronchial epithelial cells 16HBE, PAX6 in NSCLC tissues and A549 cell lines was signiifcantly higher expression. After transfection with efifcient sequence of PAX6 siRNA for A549 cell lines, the down expression of PAX6 inhibits tumor cell proliferation, the proportion of cells in G1 phase increased, the cell invasion and migration decreased remarkably. Cyclin E and p38 activity was inhibited inPAX6 knockdown cells.Conclusion:PAX6 accelerate cell cycle progression by activating cyclin E and p38. PAX6 is a potential target for diagnosis and therapy.
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Objective To investigate the effect of tea polyphenols and sulforaphane on the expression of protein kinase A anchoring protein 95 and cyclin E2 in lung cancer tissue.Methods 56 cases confirmed by pathology and operation therapy for lung cancer patients,were randomly divided into combined treatment group and control group,each had 28 cases.The content of protein kinase A anchoring protein 95 and cell cycle protein E2 in all patients were determined with ELISA.The expression of protein kinase A anchoring protein 95,cyclin E2 and statistics of microvessel density(MVD) were detected by immunohistochemical SP method.The protein levels of protein kinase A anchoring protein 95 and cell cycle protein E2 protein were detected by Western Blot. Results The contents of protein kinase A anchoring protein 95 and cyclin E2 in control group were higher than that in combination group,the differences were statistically significant(P<0.01 ).Immunohistochemical SP results showed that protein kinase A anchoring protein 95 and cyclin E2 expression all had positive expression,and the MVD in control group was higher than combination group(P<0.01);Western Blot results showed that the expressions of protein kinase A anchoring protein 95 and cyclin E2 protein in control group were higher than combination group(P<0.01).Conclusion Protein kinase A anchoring protein 95 and cyclin E2 expressions are increased in both groups in lung cancer tissues,and they are positively correlated,negatively correlated with drug treatment,which can be used as the indexes of lung cancer evaluation.
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Objective To explore the expression of PIN1 and Cyclin E in gastric carcinoma tissue after radical gastrectomy and its significance.Methods 46 patients received radical gastrectomy were selected as study subjects.Cancer tissues were harvested as the gastric cancer group,and the adjacent normal tissues of tumor tissue were harvested as the control group.The expression of PIN1 and Cyclin E was observed by immunohistochemistry,and the relationship with tumor infiltration,differentiation,lymphatic and distant metastasis were analyzed.A five year followup study was also applied.Results The expression of PIN1 (3 949.66 ± 157.40) and Cyclin E (5 443.07 ±240.15) was significantly higher than those of the control group[(247.67 ± 75.63),(354.92 ± 93.88)] (all P ＜0.05),and the expression of PIN1 was related with tumor differentiation,lymphatic and distant metastasis,and the expression of Cyclin E was closely related with tumor infiltration and differentiation.The 5-year survival rate of patients with the simultaneously increased expression of PIN1 and Cyclin E was 50.0％,which was significantly lower than the expression of the two separate elevated or not elevated.Conclusion The expression of PIN1 and Cyclin E in cancer tissues after radical gastrectomy is high,and could better reflect the pathological parameters and prognosis.
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Objective To investigate the expression and significance of cyclin E in rectum carcinoma.Methods The expression of cyclin E was examined by immunohistochemical techniques in 42 cases of rectum carcinoma.Laboratory data were then analyzed statistically together with the related clinical and pathological data.Results The positive expression rate of cyclin E in rectum carcinoma was 66.7％(28/42).There was no significant association between cyclin E and gender,age,histological grade,pTNM stage,metastasis of lymph node (P ＞ 0.05).Conclusions The expression of cyclin E in rectum carcinoma is higher,and it may show highly associated with the occurrence and development of the rectum carcinoma.Cyclin E has no significant association with age,gender,histological grade,pTNM stage,metastasis of lymph
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Cyclin E is expressed starting from the middle G1 phase of the cell cycle,and is accumulated in the G1/S boundry.Cyclin E binds to and activates the cyclin-dependent kinase CDK2.Cyclin E-CDK2 complex initiates a cascade of events that leads to DNA replication by phosphorylating its substrates,such as Rb,CDC6,NPAT and P107,etc.Additionally,cyclin E plays an important role in the regulation of genomic stability,spindle-organizing structure and centrosome cycle.Cyclin E expression is trans-activated by members of the transcription factor E2F family and degrades via the ubiquitin-proteasome pathway.At the same time,it is also negatively regulated by the CIP/KIP proteins.Cyclin E highly expressed in the initiation and progression of different human cancers,such as breast cancers,lung cancers,leukemia,lymphomas and others.
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Objective This study aimed to investigate the expression of Cyclin E protein in the progress of occurrence and development of gastric cancer and lymphonode metastatic cancer.Methods The expression of Cyclin E protein analyzed by immunohistochemistry in gastric tissue array included of normal gastric mucosa,cancer side tissues,atypical hyperplasia tissues,primary cancer tissues and lymphonode metastatic cancer tissues.Results The positive expression rate of Cyclin E protein was 14.3％,20.0％,34.7％,85.1％ and 82.9％ in normal gastric mucosa,atypical hyperplasia tissue,carcinoma side tissue,primary cancer and lymphonode metastatic cancer,respectively.Compared with normal gastric mucosa and carcinoma side tissues and atypical hyperplasia tissues,the Cyclin E protein in primary cancer and lymphonode metastatic carcinoma tissues was over-expression ( P ＜ 0.01 ).Conclusions The Cyclin E protein was a possible molecular marker that can be used to diagnosis gastric cancer and lymphaden metastasis cancer.