AIM To determine if exacerbation of pre-existing chronic colitis in Winnie(Muc2 mutant) mice induces colonic dysplasia.METHODS Winnie mice and C57BL6 as a genotype control, were administered 1% w/v dextran sulphate so...AIM To determine if exacerbation of pre-existing chronic colitis in Winnie(Muc2 mutant) mice induces colonic dysplasia.METHODS Winnie mice and C57BL6 as a genotype control, were administered 1% w/v dextran sulphate sodium(DSS) orally, followed by drinking water alone in weeklong cycles for a total of three cycles. After the third cycle, mice were killed and colonic tissue collected for histological and immunohistochemical evaluation. Inflammation and severity of dysplasia in the colonic mucosa were assessed in H&E sections of the colon. Epithelial cell proliferation was assessed using Ki67 and aberrant β-catenin signalling assessed with enzyme-based immunohistochemistry. Extracted RNA from colonic segments was used for the analysis of gene expression using real-time quantitative PCR. Finally, the distribution of Cxcl5 was visualised using immunohistochemistry.RESULTS Compared to controls, Winnie mice exposed to three cycles of DSS displayed inflammation mostly confined to the distal-mid colon with extensive mucosal hyperplasia and regenerative atypia resembling epithelial dysplasia. Dysplasia-like changes were observed in 100% of Winnie mice exposed to DSS, with 55% of these animals displaying changes similar to high-grade dysplasia, whereas high-grade changes were absent in wild-type mice. Occasional penetration of the muscularis mucosae by atypical crypts was observed in 27% of Winnie mice after DSS. Atypical crypts however displayed no evidence of oncogenic nuclear β-catenin accumulation, regardless of histological severity. Expression of Cav1, Trp53 was differentially regulated in the distal colon of Winnie relative to wild-type mice. Expression of Myc and Ccl5 was increased by DSS treatment in Winnie only. Furthermore, increased Ccl5 expression correlated with increased complexity in abnormal crypts. While no overall difference in Cxcl5 mucosal expression was observed between treatment groups, epithelial Cxcl5 protein appeared to be diminished in the atypical epithelium. CONCLUSION Alterations to the expre展开更多
Objective:To study the effect of Wenglian jiedu decoction on the expression of serum interleukin-18(IL-18),tumor necrosis factor-α(TNF--α)and colonic mucin-2(MUC2)in rats with ulcerative colitis of turbid toxin type...Objective:To study the effect of Wenglian jiedu decoction on the expression of serum interleukin-18(IL-18),tumor necrosis factor-α(TNF--α)and colonic mucin-2(MUC2)in rats with ulcerative colitis of turbid toxin type,and to explore its mechanism.Methods:60 Wistar male rats were randomly divided into model group,Wenglian jiedu decoction low,middle and high dose groups,mesalazine group and blank group.Except for the blank group,the rat model of ulcerative colitis was established by trinitrobenzenesulfonic acid(TNBS)/ethanol compound method.The general condition,body weight,fecal properties and occult blood of rats were observed 2 weeks after administration.The disease activity index(Diseaseactivityindex,DAI)was scored,the content of MUC2 protein was detected by immunohistochemical method,and the contents of IL-18 and TNF-αin serum were detected by enzyme-linked immunosorbent assay(Elisa).Results:compared with the blank group,the DAI score increased,the contents of IL-18 and TNF-αincreased significantly,and the content of MUC2 protein decreased in the model group.Compared with the model group,the DAI score,the content of IL-18 and TNF-αdecreased and the content of MUC2 protein increased in each treatment group.Compared with the mesalazine group,the DAI score and the contents of IL-18 and TNF-αin the high and middle dose groups had no significant difference.Compared with the low dose group,the DAI score in the mesalazine group and the high and middle dose group decreased,and the contents of IL-18 and TNF-αdecreased.Conclusion:Wenglian jiedu decoction can regulate the immune system of intestinal epithelium by regulating the levels of serum IL-18 and TNF-αand increasing the expression of MUC2 protein,so as to achieve the purpose of repairing intestinal mucosa.展开更多
AIM: To investigate mucin expression profiles in colorectal carcinoma (CRC) histological subtypes with regard to clinicopathologic variables and prognosis. METHODS: Mucin (MUC)2 and MUC5AC expressions were assessed by...AIM: To investigate mucin expression profiles in colorectal carcinoma (CRC) histological subtypes with regard to clinicopathologic variables and prognosis. METHODS: Mucin (MUC)2 and MUC5AC expressions were assessed by immunohistochemistry for a total of 250 CRC cases that underwent surgical resection. CRCs included 63 well-to-moderately differentiated adenocar-cinomas (WMDAs), 91 poorly differentiated adenocarcinomas (PDAs), 81 mucinous adenocarcinoma (MUAs), and 15 signet-ring cell carcinomas (SRCCs). MUC2 and MUC5AC were scored as positive when ≥ 25% and ≥ 1% of cancer cells were stained positive, respectively. The human mutL homolog 1 and human mutS homolog 2 expressions were assessed by immunohistochemistry in PDAs to investigate mismatch-repair (MMR) status.Tumors that did not express either of these two were considered MMR-deficient. Results were analyzed for associations with clinicopathologic variables and the prognosis in individual histological CRC subtypes. RESULTS: MUC2-positive and MUC5AC-positive WMDA percentages were 49.2% and 30.2%, respectively. In contrast, MUC2-positive and MUC5AC-positive PDA percentages were 9.5% and 51.6%, respectively. MUC2 levels tended to decrease and MUC5AC levels tended to increase from WMDA to PDA. In 21 tumors comprising both adenoma and adenocarcinoma components in a single tumor (4 WMDAs, 7 PDAs, and 10 MUAs), MUC2 was significantly downregulated in PDA and MUC5AC was downregulated in PDA and MUA in the adenoma-carcinoma sequence. These results suggested that MUC2 levels might be associated with malignant potential and that MUC5AC expression was an early event in tumorigenesis. Despite worse prognoses than WMDA, high MUC2 expression levels were maintained in MUA (95.1%) and SRCC (71.5%), which suggested a pathogenesis for these subtypes distinct from that of WMDA. No significant associations were found between MUC2 expression and any clinicopathologic variables in any histological subtype. MUC5AC expression in PDA was closely associated with right-sided location展开更多
基金Supported by a Clifford Craig Medical Research Trust project grant and Cancer Council Tasmania(to Kunde D and Eri R)a Bowel Cancer Funding Partners Ph D scholarship generously funded by Rotary District 9830,Australian Rotary Health and the University of Tasmania(to Randall-Demllo S)
文摘AIM To determine if exacerbation of pre-existing chronic colitis in Winnie(Muc2 mutant) mice induces colonic dysplasia.METHODS Winnie mice and C57BL6 as a genotype control, were administered 1% w/v dextran sulphate sodium(DSS) orally, followed by drinking water alone in weeklong cycles for a total of three cycles. After the third cycle, mice were killed and colonic tissue collected for histological and immunohistochemical evaluation. Inflammation and severity of dysplasia in the colonic mucosa were assessed in H&E sections of the colon. Epithelial cell proliferation was assessed using Ki67 and aberrant β-catenin signalling assessed with enzyme-based immunohistochemistry. Extracted RNA from colonic segments was used for the analysis of gene expression using real-time quantitative PCR. Finally, the distribution of Cxcl5 was visualised using immunohistochemistry.RESULTS Compared to controls, Winnie mice exposed to three cycles of DSS displayed inflammation mostly confined to the distal-mid colon with extensive mucosal hyperplasia and regenerative atypia resembling epithelial dysplasia. Dysplasia-like changes were observed in 100% of Winnie mice exposed to DSS, with 55% of these animals displaying changes similar to high-grade dysplasia, whereas high-grade changes were absent in wild-type mice. Occasional penetration of the muscularis mucosae by atypical crypts was observed in 27% of Winnie mice after DSS. Atypical crypts however displayed no evidence of oncogenic nuclear β-catenin accumulation, regardless of histological severity. Expression of Cav1, Trp53 was differentially regulated in the distal colon of Winnie relative to wild-type mice. Expression of Myc and Ccl5 was increased by DSS treatment in Winnie only. Furthermore, increased Ccl5 expression correlated with increased complexity in abnormal crypts. While no overall difference in Cxcl5 mucosal expression was observed between treatment groups, epithelial Cxcl5 protein appeared to be diminished in the atypical epithelium. CONCLUSION Alterations to the expre
基金Cooperative Pilot Project of Traditional Chinese Medicine and Western Medicine on Prevention and Treatment of Major Difficult Diseases(Ulcerative colitis)[(2018)No 3]Construction Project of Key Subject(Traditional Chinese Medicine)of National Administration of Traditional Chinese Medicine[(2018)No 210]Periodic Study on Effect of Combination of Shaoyao Decoction with Mesalazine on Rats with Ulcerative Colitis(No.2020077)。
文摘Objective:To study the effect of Wenglian jiedu decoction on the expression of serum interleukin-18(IL-18),tumor necrosis factor-α(TNF--α)and colonic mucin-2(MUC2)in rats with ulcerative colitis of turbid toxin type,and to explore its mechanism.Methods:60 Wistar male rats were randomly divided into model group,Wenglian jiedu decoction low,middle and high dose groups,mesalazine group and blank group.Except for the blank group,the rat model of ulcerative colitis was established by trinitrobenzenesulfonic acid(TNBS)/ethanol compound method.The general condition,body weight,fecal properties and occult blood of rats were observed 2 weeks after administration.The disease activity index(Diseaseactivityindex,DAI)was scored,the content of MUC2 protein was detected by immunohistochemical method,and the contents of IL-18 and TNF-αin serum were detected by enzyme-linked immunosorbent assay(Elisa).Results:compared with the blank group,the DAI score increased,the contents of IL-18 and TNF-αincreased significantly,and the content of MUC2 protein decreased in the model group.Compared with the model group,the DAI score,the content of IL-18 and TNF-αdecreased and the content of MUC2 protein increased in each treatment group.Compared with the mesalazine group,the DAI score and the contents of IL-18 and TNF-αin the high and middle dose groups had no significant difference.Compared with the low dose group,the DAI score in the mesalazine group and the high and middle dose group decreased,and the contents of IL-18 and TNF-αdecreased.Conclusion:Wenglian jiedu decoction can regulate the immune system of intestinal epithelium by regulating the levels of serum IL-18 and TNF-αand increasing the expression of MUC2 protein,so as to achieve the purpose of repairing intestinal mucosa.
文摘AIM: To investigate mucin expression profiles in colorectal carcinoma (CRC) histological subtypes with regard to clinicopathologic variables and prognosis. METHODS: Mucin (MUC)2 and MUC5AC expressions were assessed by immunohistochemistry for a total of 250 CRC cases that underwent surgical resection. CRCs included 63 well-to-moderately differentiated adenocar-cinomas (WMDAs), 91 poorly differentiated adenocarcinomas (PDAs), 81 mucinous adenocarcinoma (MUAs), and 15 signet-ring cell carcinomas (SRCCs). MUC2 and MUC5AC were scored as positive when ≥ 25% and ≥ 1% of cancer cells were stained positive, respectively. The human mutL homolog 1 and human mutS homolog 2 expressions were assessed by immunohistochemistry in PDAs to investigate mismatch-repair (MMR) status.Tumors that did not express either of these two were considered MMR-deficient. Results were analyzed for associations with clinicopathologic variables and the prognosis in individual histological CRC subtypes. RESULTS: MUC2-positive and MUC5AC-positive WMDA percentages were 49.2% and 30.2%, respectively. In contrast, MUC2-positive and MUC5AC-positive PDA percentages were 9.5% and 51.6%, respectively. MUC2 levels tended to decrease and MUC5AC levels tended to increase from WMDA to PDA. In 21 tumors comprising both adenoma and adenocarcinoma components in a single tumor (4 WMDAs, 7 PDAs, and 10 MUAs), MUC2 was significantly downregulated in PDA and MUC5AC was downregulated in PDA and MUA in the adenoma-carcinoma sequence. These results suggested that MUC2 levels might be associated with malignant potential and that MUC5AC expression was an early event in tumorigenesis. Despite worse prognoses than WMDA, high MUC2 expression levels were maintained in MUA (95.1%) and SRCC (71.5%), which suggested a pathogenesis for these subtypes distinct from that of WMDA. No significant associations were found between MUC2 expression and any clinicopathologic variables in any histological subtype. MUC5AC expression in PDA was closely associated with right-sided location
