AIM:To study the diagnostic value of immunoglobulin heavy chain(IgH)and T-cell receptorγ (TCR-γ)gene monoclonal rearrangements in primary gastric lymphoma(PGL).METHODS:A total of 48 patients with suspected PGL at ou...AIM:To study the diagnostic value of immunoglobulin heavy chain(IgH)and T-cell receptorγ (TCR-γ)gene monoclonal rearrangements in primary gastric lymphoma(PGL).METHODS:A total of 48 patients with suspected PGL at our hospital were prospectively enrolled in this study from January 2009 to December 2011.The patients were divided into three groups(a PGL group,a gastric linitis plastica group,and a benign gastric ulcer group)based on the pathological results(gastric mucosal specimens obtained by endoscopy or surgery)and follow-up.Endoscopic ultrasonography(EUS)and EUSguided biopsy were performed in all the patients.The tissue specimens were used for histopathological examination and for IgH and TCR-γ gene rearrangement polymerase chain reaction analyses.RESULTS:EUS and EUS-guided biopsy were successfully performed in all 48 patients.In the PGL group(n=21),monoclonal IgH gene rearrangements were detected in 14(66.7%)patients.A positive result for each set of primers was found in 12(57.1%),8(38.1%),and 4(19.0%)cases using FR1/JH,FR2/JH,and FR3/JH primers,respectively.Overall,12(75%)patients with mucosal-associated lymphoid tissue lymphoma(n=16)and 2(40%)patients with diffuse large B-cell lymphoma(n=5)were positive for monoclonal IgH gene rearrangements.No patients in the gastric linitis plastica group(n=17)and only one(10%)patient in the benign gastric ulcer group(n=10)were positive for a monoclonal IgH gene rearrangement.No TCRgene monoclonal rearrangements were detected.The sensitivity of monoclonal IgH gene rearrangements was 66.7%for a PGL diagnosis,and the specificity was96.4%.In the PGL group,8(100%)patients with stage IIE PGL(n=8)and 6(46.1%)patients with stage IE PGL(n=13)were positive for monoclonal IgH gene rearrangements.CONCLUSION:IgH gene rearrangements may be associated with PGL staging and may be useful for the diagnosis of PGL and for differentiating between PGL and gastric linitis plastica.展开更多
γ-Polyglutamic acid (γ-PGA) is a major component of Natto. We hypothesized that γ-PGA could reduce postprandial glucose rise and plasma glucose levels. Mice were fed a 0.1% γ-PGA—containing diet or control diet f...γ-Polyglutamic acid (γ-PGA) is a major component of Natto. We hypothesized that γ-PGA could reduce postprandial glucose rise and plasma glucose levels. Mice were fed a 0.1% γ-PGA—containing diet or control diet for 91 days. Maltose and starch tolerance tests were performed, and plasma lipids, glucose levels, and caecal short chain fatty acids (SCFAs) were measured. Mice were co-administered γ-PGA and starch to suppress the initial rise in blood glucose levels. Blood glucose levels at 15 min were significantly lower in the PGA group than in the Con group (P 0.05). The plasma glucose level and NEFA level were also significantly lower in the PGA group (P 0.05), and caecal acetic acid/total caecal SCFAs ratio was significantly increased in the PGA group (P 0.05). Significant negative correlations existed between the caecal acetic acid/propionic acid ratio and the weight of visceral fat/BW (r =?-0.57, P = 0.0318). Our results suggest that γ-PGA may effectively prevent metabolic syndrome by lowering blood glucose levels.展开更多
目的 获得鼠抗人精浆蛋白 m Ab重链 Fd段基因 ,并将其转染到 He L a细胞进行表达 .方法 从分泌抗人精浆蛋白 m Ab的杂交瘤细胞系 E4 B7中提取总 RNA,用 RT- PCR法获取重链 Fd段 c DNA.将其克隆入真核表达载体 pc D-NA3,用脂质体转染...目的 获得鼠抗人精浆蛋白 m Ab重链 Fd段基因 ,并将其转染到 He L a细胞进行表达 .方法 从分泌抗人精浆蛋白 m Ab的杂交瘤细胞系 E4 B7中提取总 RNA,用 RT- PCR法获取重链 Fd段 c DNA.将其克隆入真核表达载体 pc D-NA3,用脂质体转染法转染 He L a细胞 ,并用免疫荧光染色方法检测重链 Fd段的表达 .结果 从分泌抗人精浆蛋白的鼠m Ab杂交瘤细胞系 E4 B7中克隆出了重链 Fd段基因 ,序列测定表明 ,VH 与鼠免疫球蛋白 MUSIGHAEI同源性最高 .将含重链 Fd段基因的真核表达载体 pc DNA3- E4 B7Fd中转染He L a细胞后 ,在 He L a细胞中检测到了重链 Fd段的表达 .结论 获得了序列正确的重链 Fd段基因 ,它在 He L a细胞中可以成功地表达 ,为进一步构建和表达 Fab奠定基础 .展开更多
为了建立稳定表达猪FcγRⅢ(Porcine Fc gamma receptorⅢ,poFcγRⅢ)的Marc-145细胞系,从PAM细胞中提取总RNA,应用RT-PCR技术获得猪FcγRⅢ和γ链的cDNA,并构建PIREShyg3-γ和pcDNA3.1-FcγRⅢ真核表达质粒;用脂质体共转染Marc-145细胞...为了建立稳定表达猪FcγRⅢ(Porcine Fc gamma receptorⅢ,poFcγRⅢ)的Marc-145细胞系,从PAM细胞中提取总RNA,应用RT-PCR技术获得猪FcγRⅢ和γ链的cDNA,并构建PIREShyg3-γ和pcDNA3.1-FcγRⅢ真核表达质粒;用脂质体共转染Marc-145细胞,经潮霉素B(300 mg/L)和G418(400 mg/L)共筛选获得稳定表达猪FcγRⅢ的细胞系;运用RT-PCR、玫瑰花环试验和流式细胞术对细胞系进行了鉴定。结果表明,成功构建了猪FcγRⅢ和γ链真核表达载体,建立了稳定表达猪FcγRⅢ的细胞系,表达于转染细胞表面的猪FcγRⅢ受体分子能与猪IgG特异结合。展开更多
基金Supported by The Scientific Research Foundation of the Ministry of Health,China,the Medical and Health Science Foundation,Zhejiang Province,China,No.WKJ-2009-2-021
文摘AIM:To study the diagnostic value of immunoglobulin heavy chain(IgH)and T-cell receptorγ (TCR-γ)gene monoclonal rearrangements in primary gastric lymphoma(PGL).METHODS:A total of 48 patients with suspected PGL at our hospital were prospectively enrolled in this study from January 2009 to December 2011.The patients were divided into three groups(a PGL group,a gastric linitis plastica group,and a benign gastric ulcer group)based on the pathological results(gastric mucosal specimens obtained by endoscopy or surgery)and follow-up.Endoscopic ultrasonography(EUS)and EUSguided biopsy were performed in all the patients.The tissue specimens were used for histopathological examination and for IgH and TCR-γ gene rearrangement polymerase chain reaction analyses.RESULTS:EUS and EUS-guided biopsy were successfully performed in all 48 patients.In the PGL group(n=21),monoclonal IgH gene rearrangements were detected in 14(66.7%)patients.A positive result for each set of primers was found in 12(57.1%),8(38.1%),and 4(19.0%)cases using FR1/JH,FR2/JH,and FR3/JH primers,respectively.Overall,12(75%)patients with mucosal-associated lymphoid tissue lymphoma(n=16)and 2(40%)patients with diffuse large B-cell lymphoma(n=5)were positive for monoclonal IgH gene rearrangements.No patients in the gastric linitis plastica group(n=17)and only one(10%)patient in the benign gastric ulcer group(n=10)were positive for a monoclonal IgH gene rearrangement.No TCRgene monoclonal rearrangements were detected.The sensitivity of monoclonal IgH gene rearrangements was 66.7%for a PGL diagnosis,and the specificity was96.4%.In the PGL group,8(100%)patients with stage IIE PGL(n=8)and 6(46.1%)patients with stage IE PGL(n=13)were positive for monoclonal IgH gene rearrangements.CONCLUSION:IgH gene rearrangements may be associated with PGL staging and may be useful for the diagnosis of PGL and for differentiating between PGL and gastric linitis plastica.
文摘γ-Polyglutamic acid (γ-PGA) is a major component of Natto. We hypothesized that γ-PGA could reduce postprandial glucose rise and plasma glucose levels. Mice were fed a 0.1% γ-PGA—containing diet or control diet for 91 days. Maltose and starch tolerance tests were performed, and plasma lipids, glucose levels, and caecal short chain fatty acids (SCFAs) were measured. Mice were co-administered γ-PGA and starch to suppress the initial rise in blood glucose levels. Blood glucose levels at 15 min were significantly lower in the PGA group than in the Con group (P 0.05). The plasma glucose level and NEFA level were also significantly lower in the PGA group (P 0.05), and caecal acetic acid/total caecal SCFAs ratio was significantly increased in the PGA group (P 0.05). Significant negative correlations existed between the caecal acetic acid/propionic acid ratio and the weight of visceral fat/BW (r =?-0.57, P = 0.0318). Our results suggest that γ-PGA may effectively prevent metabolic syndrome by lowering blood glucose levels.
文摘目的 获得鼠抗人精浆蛋白 m Ab重链 Fd段基因 ,并将其转染到 He L a细胞进行表达 .方法 从分泌抗人精浆蛋白 m Ab的杂交瘤细胞系 E4 B7中提取总 RNA,用 RT- PCR法获取重链 Fd段 c DNA.将其克隆入真核表达载体 pc D-NA3,用脂质体转染法转染 He L a细胞 ,并用免疫荧光染色方法检测重链 Fd段的表达 .结果 从分泌抗人精浆蛋白的鼠m Ab杂交瘤细胞系 E4 B7中克隆出了重链 Fd段基因 ,序列测定表明 ,VH 与鼠免疫球蛋白 MUSIGHAEI同源性最高 .将含重链 Fd段基因的真核表达载体 pc DNA3- E4 B7Fd中转染He L a细胞后 ,在 He L a细胞中检测到了重链 Fd段的表达 .结论 获得了序列正确的重链 Fd段基因 ,它在 He L a细胞中可以成功地表达 ,为进一步构建和表达 Fab奠定基础 .
