AIM:To investigate expression of stem cell marker Musashi-1(Msi-1)in relationship to tumorigenesis and progression of intestinal-type gastric cancer(GC).METHODS:Endoscopic biopsy specimens and surgical specimens were ...AIM:To investigate expression of stem cell marker Musashi-1(Msi-1)in relationship to tumorigenesis and progression of intestinal-type gastric cancer(GC).METHODS:Endoscopic biopsy specimens and surgical specimens were obtained,including 54 cases of intestinal-type GC,41 high-grade intraepithelial neoplasia,57low-grade intraepithelial neoplasia,31 intestinal metaplasia,and 36 normal gastric mucosa.Specimens were fixed in 10%paraformaldehyde,conventionally dehydrated,embedded in paraffin,and sliced in 4-μm-thick serial sections.Two-step immunohistochemical staining was used to detect Msi-1 and proliferating cell nuclear antigen(PCNA)expression.Correlation analysis was conducted between Msi-1 and PCNA expression.The relationship between Msi-1 expression and clinicopathological parameters of GC was analyzed statistically.RESULTS:There were significant differences in Msi-1and PCNA expression in different pathological tissues(χ2=15.37,P<0.01;χ2=115.36,P<0.01).Msi-1and PCNA-positive cells were restricted to the isthmus of normal gastric glands.Expression levels of Msi-1and PCNA in intestinal metaplasia were significantly higher than in normal mucosa(U=392.0,P<0.05;U=40.50,P<0.01),whereas there was no significant difference compared to low or high-grade intraepithelial neoplasia.Msi-1 and PCNA expression in intestinaltype GC was higher than in high-grade intraepithelial neoplasia(U=798.0,P<0.05;U=688.0,P<0.01).There was a significantly positive correlation between Msi-1 and PCNA expression(rs=0.20,P<0.01).Msi-1expression in GC tissues was correlated with their lymph node metastasis and tumor node metastasis stage(χ2=12.62,P<0.01;χ2=11.24,P<0.05),but not with depth of invasion and the presence of distant metastasis.CONCLUSION:Msi-1-positive cells may play a key role in the early events of gastric carcinogenesis and may be involved in invasion and metastasis of GC.展开更多
AIM:To explore the relationship between Cripto-1 (CR-1) and tyrosine phosphorylation STAT3 (p-STAT3) expressions in gastric cancer (GC) and gastric carcinogensis and metastasis.METHODS: The PV9000 immunohistochemical ...AIM:To explore the relationship between Cripto-1 (CR-1) and tyrosine phosphorylation STAT3 (p-STAT3) expressions in gastric cancer (GC) and gastric carcinogensis and metastasis.METHODS: The PV9000 immunohistochemical method was used to detect the expression of CR-1 and p-STAT3 in 178 cases of GC, 95 matched normal gastric mucosa, 40 chronic atrophic gastritis (CAG), 48 intestinal meta-plasia (IM) and 25 dysplasia (DYS). RESULTS: The positive rates of CR-1 and p-STAT3 expression were significantly higher in CAG (65.0% and 60.0%), in IM (83.3% and 77.1%), DYS (80.0% and 68%) and GC (71.3% and 60.1%) than in normal gastric mucosa (43.2% and 41.1%, P < 0.05), respectively. The expressions of CR-1 and p-STAT3 (78.3% and 66.7%) were signifi cantly higher in GC with lymphnode metastasis than in those without metastasis (53.1% and 42.9%, P < 0.05). CR-1 expression was also related to histological and Lauren's types of GC (P < 0.001). Furthermore, there was positive relation-ship between CR-1 and p-STAT3 expressions in GC (rk = 0.189, P = 0.002).CONCLUSION: The up-regulation of CR-1 and p-STAT3 may play important roles in gastric carcinogenesis and lymph node metastasis. CR-1 and p-STAT3 expression in GC was positively correlated, and the relevant molecular mechanism requires further investigations.展开更多
BACKGROUND In recent years,the incidence of gastrointestinal(GI)cancer in China has increased annually.Early detection and appropriate therapy are considered to be the key to treat GI cancer.DNMT1 takes an active part...BACKGROUND In recent years,the incidence of gastrointestinal(GI)cancer in China has increased annually.Early detection and appropriate therapy are considered to be the key to treat GI cancer.DNMT1 takes an active part in the advancement of GI cancer,which will change as the disease progresses.But its expression characteristics in the dynamic variations of GI carcinogenesis are still unclear.AIM To investigate the expression characteristics of DNMT1 in different GI diseases.METHODS We detected the expression of DNMT1 in 650 cases of different GI diseases by immunohistochemistry,including 90 cases of chronic superficial gastritis(CSG),72 cases of atrophic gastritis with intestinal metaplasia(AG/GIM),54 cases of low-grade intraepithelial neoplasia(GLIN),66 cases of high-grade intraepithelial neoplasia(GHIN),71 cases of early gastric cancer(EGC),90 cases of normal intestinal mucosa(NIM),54 cases of intestinal low-grade intraepithelial neoplasia(ILIN),71 cases of intestinal high-grade intraepithelial neoplasia(IHIN),and 82 cases of early colorectal cancer(ECRC).RESULTS In the CSG group,all cases showed weakly positive or negative expression of DNMT1.However,in other four groups(AG/GIM,GLIN,GHIN,and EGC),the positive expression rate gradually increased with the severity of the diseases;the negative or weakly positive cases accounted for 55.56%(40/72),38.89%(21/54),1.52%(1/66),and 1.41%(1/71),respectively.Besides,the moderately positive cases were 44.44%(32/72),57.41%(31/54),80.30%(53/66),and 43.66%(31/71),respectively.The strongly positive cases only existed in the GLIN(3.70%,2/54),GHIN(18.18%,12/66),and EGC(54.93%,39/71)groups.The differences between any two groups were statistically significant(P<0.05).Similarly,in the NIM group,cases with weakly positive expression of DNMT1 were predominant(91.11%,82/90),and the rest were moderately positive cases(8.89%,8/90).In the ILIN,IHIN,and ECRC groups,the rates of cases with weak or negative expression of DNMT1 were 46.30%(25/54),12.68%(9/71),and 4.88%(4/82),respectively;with moderately positive expression were 53.70%(29/54),71.83%(51/71),and 34.15%(28/82),respectively;and with strongly positive expression were 0.00%(0/54),15.49%(11/71),and 60.98%(50/82),respectively.The differences between any two groups were also statistically significant(P<0.05).CONCLUSION The overexpression of DNMT1 protein could effectively predict early GI cancers and severe precancerous lesions,which may have potential clinical application value.展开更多
Objective： To investigate the expressions and proteins in the pathogenesis, progression of lung molecular mechanism of Ets-1 mRNA, and TGFβ1 and c-Met cancer by tissue microarray （TMA） method. Methods： The expres...Objective： To investigate the expressions and proteins in the pathogenesis, progression of lung molecular mechanism of Ets-1 mRNA, and TGFβ1 and c-Met cancer by tissue microarray （TMA） method. Methods： The expressions of Ets-1 mRNA, and TGFβ1 and c-Met proteins were detected in 89 primary lung cancers, 12 lung cancer with lymph-node metastasis and 12 precancerous lesions by FISH（fluorescence in situ hybridization） and immunohistochemical method, and 10 normal lung tissues were used as controls. Results： The expressions of Ets-1 rnRNA, and TGFβ1 and c-Met proteins were significantly higher in 89 primary lung cancer than in the control group （P〈0.05）. The expressions of Ets-1 mRNA, and TGFβ1 and c-Met proteins were related to lymph node metastasis and clinical stages. There was a positive correlation between the Ets-1 mRNA expression and TGFβ1 and c-Met proteins （P〈0.05）. Conclusion： Ets-1 mRNA, TGFβ1 and c-Met proteins may be related to the pathogenesis, progression and malignant behavior of lung cancer. They may play an important role in prognosis assessment of lung cancer.展开更多
目的研究乳腺癌易感基因1(BRCA1)和切除修复交叉互补基因1(ERCC1)在乳腺癌发生、发展中的作用及临床意义。方法采用原位杂交技术(ISH)检测BRCA1和ERCC1 m RNA在乳腺癌癌前病变和乳腺癌组织芯片中的表达,以及与乳腺癌临床病理因素的关系...目的研究乳腺癌易感基因1(BRCA1)和切除修复交叉互补基因1(ERCC1)在乳腺癌发生、发展中的作用及临床意义。方法采用原位杂交技术(ISH)检测BRCA1和ERCC1 m RNA在乳腺癌癌前病变和乳腺癌组织芯片中的表达,以及与乳腺癌临床病理因素的关系。结果 1BRCA1和ERCC1 m RNA在乳腺癌旁正常组织、乳腺癌癌前病变及乳腺癌组织中的阳性表达率呈递减趋势,差异有统计学意义(P<0.05)。2BRCA1和ERCC1 m RNA在乳腺癌的表达差异显著并具有相关性(P<0.01)。3BRCA1 m RNA的阳性表达与乳腺癌组织学分级、肿瘤大小呈负相关(P<0.05),与发病年龄、临床分期和淋巴结转移无关(P>0.05),ERCC1m RNA的表达与肿瘤大小和淋巴结转移相关(P<0.05),与患者发病年龄、组织学分级及临床分期无关(P>0.05)。结论 BRCAl与ERCC1 m RNA表达的减少可能与乳腺癌的发生发展有关,两基因的联合检测有利于乳腺癌的早期诊断与治疗。展开更多
基金Supported by Jinan Science and Technology Bureau for Independent Innovation Projects of Universities and Research Institutes in Jinan city,China,No.201102060
文摘AIM:To investigate expression of stem cell marker Musashi-1(Msi-1)in relationship to tumorigenesis and progression of intestinal-type gastric cancer(GC).METHODS:Endoscopic biopsy specimens and surgical specimens were obtained,including 54 cases of intestinal-type GC,41 high-grade intraepithelial neoplasia,57low-grade intraepithelial neoplasia,31 intestinal metaplasia,and 36 normal gastric mucosa.Specimens were fixed in 10%paraformaldehyde,conventionally dehydrated,embedded in paraffin,and sliced in 4-μm-thick serial sections.Two-step immunohistochemical staining was used to detect Msi-1 and proliferating cell nuclear antigen(PCNA)expression.Correlation analysis was conducted between Msi-1 and PCNA expression.The relationship between Msi-1 expression and clinicopathological parameters of GC was analyzed statistically.RESULTS:There were significant differences in Msi-1and PCNA expression in different pathological tissues(χ2=15.37,P<0.01;χ2=115.36,P<0.01).Msi-1and PCNA-positive cells were restricted to the isthmus of normal gastric glands.Expression levels of Msi-1and PCNA in intestinal metaplasia were significantly higher than in normal mucosa(U=392.0,P<0.05;U=40.50,P<0.01),whereas there was no significant difference compared to low or high-grade intraepithelial neoplasia.Msi-1 and PCNA expression in intestinaltype GC was higher than in high-grade intraepithelial neoplasia(U=798.0,P<0.05;U=688.0,P<0.01).There was a significantly positive correlation between Msi-1 and PCNA expression(rs=0.20,P<0.01).Msi-1expression in GC tissues was correlated with their lymph node metastasis and tumor node metastasis stage(χ2=12.62,P<0.01;χ2=11.24,P<0.05),but not with depth of invasion and the presence of distant metastasis.CONCLUSION:Msi-1-positive cells may play a key role in the early events of gastric carcinogenesis and may be involved in invasion and metastasis of GC.
基金Supported by National Natural Science Foundation of China, No.30973503Special Fund for Climbing Scholars of Universities in Liaoning Province, China, 2009-2010
文摘AIM:To explore the relationship between Cripto-1 (CR-1) and tyrosine phosphorylation STAT3 (p-STAT3) expressions in gastric cancer (GC) and gastric carcinogensis and metastasis.METHODS: The PV9000 immunohistochemical method was used to detect the expression of CR-1 and p-STAT3 in 178 cases of GC, 95 matched normal gastric mucosa, 40 chronic atrophic gastritis (CAG), 48 intestinal meta-plasia (IM) and 25 dysplasia (DYS). RESULTS: The positive rates of CR-1 and p-STAT3 expression were significantly higher in CAG (65.0% and 60.0%), in IM (83.3% and 77.1%), DYS (80.0% and 68%) and GC (71.3% and 60.1%) than in normal gastric mucosa (43.2% and 41.1%, P < 0.05), respectively. The expressions of CR-1 and p-STAT3 (78.3% and 66.7%) were signifi cantly higher in GC with lymphnode metastasis than in those without metastasis (53.1% and 42.9%, P < 0.05). CR-1 expression was also related to histological and Lauren's types of GC (P < 0.001). Furthermore, there was positive relation-ship between CR-1 and p-STAT3 expressions in GC (rk = 0.189, P = 0.002).CONCLUSION: The up-regulation of CR-1 and p-STAT3 may play important roles in gastric carcinogenesis and lymph node metastasis. CR-1 and p-STAT3 expression in GC was positively correlated, and the relevant molecular mechanism requires further investigations.
文摘BACKGROUND In recent years,the incidence of gastrointestinal(GI)cancer in China has increased annually.Early detection and appropriate therapy are considered to be the key to treat GI cancer.DNMT1 takes an active part in the advancement of GI cancer,which will change as the disease progresses.But its expression characteristics in the dynamic variations of GI carcinogenesis are still unclear.AIM To investigate the expression characteristics of DNMT1 in different GI diseases.METHODS We detected the expression of DNMT1 in 650 cases of different GI diseases by immunohistochemistry,including 90 cases of chronic superficial gastritis(CSG),72 cases of atrophic gastritis with intestinal metaplasia(AG/GIM),54 cases of low-grade intraepithelial neoplasia(GLIN),66 cases of high-grade intraepithelial neoplasia(GHIN),71 cases of early gastric cancer(EGC),90 cases of normal intestinal mucosa(NIM),54 cases of intestinal low-grade intraepithelial neoplasia(ILIN),71 cases of intestinal high-grade intraepithelial neoplasia(IHIN),and 82 cases of early colorectal cancer(ECRC).RESULTS In the CSG group,all cases showed weakly positive or negative expression of DNMT1.However,in other four groups(AG/GIM,GLIN,GHIN,and EGC),the positive expression rate gradually increased with the severity of the diseases;the negative or weakly positive cases accounted for 55.56%(40/72),38.89%(21/54),1.52%(1/66),and 1.41%(1/71),respectively.Besides,the moderately positive cases were 44.44%(32/72),57.41%(31/54),80.30%(53/66),and 43.66%(31/71),respectively.The strongly positive cases only existed in the GLIN(3.70%,2/54),GHIN(18.18%,12/66),and EGC(54.93%,39/71)groups.The differences between any two groups were statistically significant(P<0.05).Similarly,in the NIM group,cases with weakly positive expression of DNMT1 were predominant(91.11%,82/90),and the rest were moderately positive cases(8.89%,8/90).In the ILIN,IHIN,and ECRC groups,the rates of cases with weak or negative expression of DNMT1 were 46.30%(25/54),12.68%(9/71),and 4.88%(4/82),respectively;with moderately positive expression were 53.70%(29/54),71.83%(51/71),and 34.15%(28/82),respectively;and with strongly positive expression were 0.00%(0/54),15.49%(11/71),and 60.98%(50/82),respectively.The differences between any two groups were also statistically significant(P<0.05).CONCLUSION The overexpression of DNMT1 protein could effectively predict early GI cancers and severe precancerous lesions,which may have potential clinical application value.
文摘Objective： To investigate the expressions and proteins in the pathogenesis, progression of lung molecular mechanism of Ets-1 mRNA, and TGFβ1 and c-Met cancer by tissue microarray （TMA） method. Methods： The expressions of Ets-1 mRNA, and TGFβ1 and c-Met proteins were detected in 89 primary lung cancers, 12 lung cancer with lymph-node metastasis and 12 precancerous lesions by FISH（fluorescence in situ hybridization） and immunohistochemical method, and 10 normal lung tissues were used as controls. Results： The expressions of Ets-1 rnRNA, and TGFβ1 and c-Met proteins were significantly higher in 89 primary lung cancer than in the control group （P〈0.05）. The expressions of Ets-1 mRNA, and TGFβ1 and c-Met proteins were related to lymph node metastasis and clinical stages. There was a positive correlation between the Ets-1 mRNA expression and TGFβ1 and c-Met proteins （P〈0.05）. Conclusion： Ets-1 mRNA, TGFβ1 and c-Met proteins may be related to the pathogenesis, progression and malignant behavior of lung cancer. They may play an important role in prognosis assessment of lung cancer.
文摘目的研究乳腺癌易感基因1(BRCA1)和切除修复交叉互补基因1(ERCC1)在乳腺癌发生、发展中的作用及临床意义。方法采用原位杂交技术(ISH)检测BRCA1和ERCC1 m RNA在乳腺癌癌前病变和乳腺癌组织芯片中的表达,以及与乳腺癌临床病理因素的关系。结果 1BRCA1和ERCC1 m RNA在乳腺癌旁正常组织、乳腺癌癌前病变及乳腺癌组织中的阳性表达率呈递减趋势,差异有统计学意义(P<0.05)。2BRCA1和ERCC1 m RNA在乳腺癌的表达差异显著并具有相关性(P<0.01)。3BRCA1 m RNA的阳性表达与乳腺癌组织学分级、肿瘤大小呈负相关(P<0.05),与发病年龄、临床分期和淋巴结转移无关(P>0.05),ERCC1m RNA的表达与肿瘤大小和淋巴结转移相关(P<0.05),与患者发病年龄、组织学分级及临床分期无关(P>0.05)。结论 BRCAl与ERCC1 m RNA表达的减少可能与乳腺癌的发生发展有关,两基因的联合检测有利于乳腺癌的早期诊断与治疗。
