采用常规及改良的中性 a-糖苷酶测定法对37例正常男性精浆中性 a-糖苷酶总活力进行了测定,数值分别为28.38～116.68 m U/每次射精(()±1.96s,下同)及15.54～84.81 m U/每次射精。两种方法所测出的中性 a-糖苷酶总活力有显著相关...采用常规及改良的中性 a-糖苷酶测定法对37例正常男性精浆中性 a-糖苷酶总活力进行了测定,数值分别为28.38～116.68 m U/每次射精(()±1.96s,下同)及15.54～84.81 m U/每次射精。两种方法所测出的中性 a-糖苷酶总活力有显著相关性。改良的方法为临床提供了正常参考值的下限。使用同样两种方法测定了48例输精管结扎术后精子已消失男性精浆中性 a-糖苷酶总活力。常规方法测定,48例全部可测出酶活力,数值为2.57～37.38mU/每次射精,而改良方法测定,其中32例酶活性消失,16例可测出酶的活性,上限为5.85 m U/每次射精。展开更多
目的报道1个以脑血管病为主要临床表现的晚发型Pompe病家系，总结其临床、病理和分子遗传学特点。方法对1个伴脑血管病的兄妹共患病晚发型Pompe病家系进行家系调查和临床、病理资料收集；5名家系成员均行酸性α-糖苷酶（GAA）基因目的片...目的报道1个以脑血管病为主要临床表现的晚发型Pompe病家系，总结其临床、病理和分子遗传学特点。方法对1个伴脑血管病的兄妹共患病晚发型Pompe病家系进行家系调查和临床、病理资料收集；5名家系成员均行酸性α-糖苷酶（GAA）基因目的片段PCR扩增与测序。结果患病者为兄妹2人，均有自青少年期出现的进行性肢带肌无力，近来出现眩晕、共济失调等症状方就诊，颅脑CT和MRI示梗死、出血和脑白质多发缺血变性灶，其中哥哥颅脑CT血管成像（CTA）示脑动脉多处狭窄与后循环系统多发动脉瘤，妹妹颅脑CTA仅显示有多处动脉串珠样狭窄。前者肌肉活体组织检查病理表现为典型的空泡样变性和肌纤维内糖原的沉积。2例患者GAA酶活性均明显低于正常。对该家系5位家族成员（包括2例患者）的GAA基因分析发现2例患者及其母亲存在第9号外显子自1388位点起19个碱基的杂合缺失突变。结论以后循环受累为主的脑血管病是Pompe病少见的特殊表型。GAA基因c．1388 del 19为新发突变，与临床表型的关系尚不能确定。展开更多
AIM: To compare the combinative and individual effect of acarbose and gymnemic acid (GA) on maltose absorption and hydrolysis in small intestine to determine whether nutrient control in diabetic care can be improved b...AIM: To compare the combinative and individual effect of acarbose and gymnemic acid (GA) on maltose absorption and hydrolysis in small intestine to determine whether nutrient control in diabetic care can be improved by combination of them. METHODS: The absorption and hydrolysis of maltose were studied by cyclic perfusion of intestinal loops in situ and motility of the intestine was recorded with the intestinal ring in vitro using Wistar rats. RESULTS: The total inhibitory rate of maltose absorption was improved by the combination of GA (0.1g/L-1.0 g/L) and acarbose (0.1 mmol/L-2.0 mmol/L) throughout their effective duration (P 【0.05, U test of Mann-Whitney), although the improvement only could be seen at a low dosage during the first hour. With the combination, inhibitory duration of acarbose on maltose absorption was prolonged to 3h and the inhibitory effect onset of GA was fastened to 15 min. GA suppressed the intestinal mobility with a good correlation (r = 0.98) to the inhibitory effect of GA on maltose absorption and the inhibitory effect of 2 mmol/L (high dose) acarbose on maltose hydrolysis was dual modulated by 1g/L GA in vivo indicating that the combined effects involved the functional alteration of intestinal barriers. CONCLUSION: There are augmented effects of acarbose and GA,which involve pre-cellular and paracellular barriers. Diabetic care can be improved by employing the combination.展开更多
OBJECTIVE: To investigate the inhibitive efficacy of Nymphoides Indica(L.) Kuntze rhizome extract onα-glucosidase and on cross-link formation of advanced glycation end products(AGEs).METHODS: The plant extracts were ...OBJECTIVE: To investigate the inhibitive efficacy of Nymphoides Indica(L.) Kuntze rhizome extract onα-glucosidase and on cross-link formation of advanced glycation end products(AGEs).METHODS: The plant extracts were prepared by cold maceration and fractionated in solvents of diverse polarity. The in vitro α-glucosidase inhibition assay, fluorescence spectrometry and SDS-PAGE analysis was performed for antiglycation assays.RESULTS: During α-glucosidase inhibition assay significant inhibition by chloroform(0.43 mg/mL)and methanol fractions(0.66 mg/mL) was noticed.During the AGEs inhibition assay, both oxidative(BSA-MGO) and non-oxidative(BSA-glucose)modes were employed. The inhibition of AGEs by total extract was considered moderate(IC_(50)0.10 mg/mL) as a result of non-oxidative mode, whereas in case of oxidative mode(BASA-MGO) no activity was recorded. Among fractions the methanolic fraction presented significant results both in oxidative(IC_(50)0.01 mg/mL) and non-oxidative modes(IC_(50) 0.3 mg/mL). Likewise the ethyl acetate fraction was more active in non-oxidative mode(IC_(50)0.04 mg/mL) compared to oxidative mode(IC_(50)0.32 mg/mL).During assay for inhibition of cross-link formation,the chloroform fraction significantly inhibited cross-link formation in a dose dependent mode.CONCLUSION: It was finally concluded that N. Indica rhizome extract possesses significant properties that inhibit α-glucosidase, and AGEs cross-link formation.展开更多
文摘采用常规及改良的中性 a-糖苷酶测定法对37例正常男性精浆中性 a-糖苷酶总活力进行了测定,数值分别为28.38～116.68 m U/每次射精(()±1.96s,下同)及15.54～84.81 m U/每次射精。两种方法所测出的中性 a-糖苷酶总活力有显著相关性。改良的方法为临床提供了正常参考值的下限。使用同样两种方法测定了48例输精管结扎术后精子已消失男性精浆中性 a-糖苷酶总活力。常规方法测定,48例全部可测出酶活力,数值为2.57～37.38mU/每次射精,而改良方法测定,其中32例酶活性消失,16例可测出酶的活性,上限为5.85 m U/每次射精。
文摘目的报道1个以脑血管病为主要临床表现的晚发型Pompe病家系，总结其临床、病理和分子遗传学特点。方法对1个伴脑血管病的兄妹共患病晚发型Pompe病家系进行家系调查和临床、病理资料收集；5名家系成员均行酸性α-糖苷酶（GAA）基因目的片段PCR扩增与测序。结果患病者为兄妹2人，均有自青少年期出现的进行性肢带肌无力，近来出现眩晕、共济失调等症状方就诊，颅脑CT和MRI示梗死、出血和脑白质多发缺血变性灶，其中哥哥颅脑CT血管成像（CTA）示脑动脉多处狭窄与后循环系统多发动脉瘤，妹妹颅脑CTA仅显示有多处动脉串珠样狭窄。前者肌肉活体组织检查病理表现为典型的空泡样变性和肌纤维内糖原的沉积。2例患者GAA酶活性均明显低于正常。对该家系5位家族成员（包括2例患者）的GAA基因分析发现2例患者及其母亲存在第9号外显子自1388位点起19个碱基的杂合缺失突变。结论以后循环受累为主的脑血管病是Pompe病少见的特殊表型。GAA基因c．1388 del 19为新发突变，与临床表型的关系尚不能确定。
基金Supported by Grant for Promotion of Science from Tottori Bioscience Foundation(1997-1998)Japan and Japanese Government(Ministry of Education,Science and Culture of Japan,MONBUSHO)scholarship No.933241(1994-1999)Japan in part.Dr.Luo was supported by the scholarships.
文摘AIM: To compare the combinative and individual effect of acarbose and gymnemic acid (GA) on maltose absorption and hydrolysis in small intestine to determine whether nutrient control in diabetic care can be improved by combination of them. METHODS: The absorption and hydrolysis of maltose were studied by cyclic perfusion of intestinal loops in situ and motility of the intestine was recorded with the intestinal ring in vitro using Wistar rats. RESULTS: The total inhibitory rate of maltose absorption was improved by the combination of GA (0.1g/L-1.0 g/L) and acarbose (0.1 mmol/L-2.0 mmol/L) throughout their effective duration (P 【0.05, U test of Mann-Whitney), although the improvement only could be seen at a low dosage during the first hour. With the combination, inhibitory duration of acarbose on maltose absorption was prolonged to 3h and the inhibitory effect onset of GA was fastened to 15 min. GA suppressed the intestinal mobility with a good correlation (r = 0.98) to the inhibitory effect of GA on maltose absorption and the inhibitory effect of 2 mmol/L (high dose) acarbose on maltose hydrolysis was dual modulated by 1g/L GA in vivo indicating that the combined effects involved the functional alteration of intestinal barriers. CONCLUSION: There are augmented effects of acarbose and GA,which involve pre-cellular and paracellular barriers. Diabetic care can be improved by employing the combination.
文摘OBJECTIVE: To investigate the inhibitive efficacy of Nymphoides Indica(L.) Kuntze rhizome extract onα-glucosidase and on cross-link formation of advanced glycation end products(AGEs).METHODS: The plant extracts were prepared by cold maceration and fractionated in solvents of diverse polarity. The in vitro α-glucosidase inhibition assay, fluorescence spectrometry and SDS-PAGE analysis was performed for antiglycation assays.RESULTS: During α-glucosidase inhibition assay significant inhibition by chloroform(0.43 mg/mL)and methanol fractions(0.66 mg/mL) was noticed.During the AGEs inhibition assay, both oxidative(BSA-MGO) and non-oxidative(BSA-glucose)modes were employed. The inhibition of AGEs by total extract was considered moderate(IC_(50)0.10 mg/mL) as a result of non-oxidative mode, whereas in case of oxidative mode(BASA-MGO) no activity was recorded. Among fractions the methanolic fraction presented significant results both in oxidative(IC_(50)0.01 mg/mL) and non-oxidative modes(IC_(50) 0.3 mg/mL). Likewise the ethyl acetate fraction was more active in non-oxidative mode(IC_(50)0.04 mg/mL) compared to oxidative mode(IC_(50)0.32 mg/mL).During assay for inhibition of cross-link formation,the chloroform fraction significantly inhibited cross-link formation in a dose dependent mode.CONCLUSION: It was finally concluded that N. Indica rhizome extract possesses significant properties that inhibit α-glucosidase, and AGEs cross-link formation.
