This paper is aimed to study the effect of ADL on expression of ~z-AR and Mz-AchR in myocardial cells of rats exposed to microwave radiation. Immunohistochemistry, Western blot and image analysis were used to detect t...This paper is aimed to study the effect of ADL on expression of ~z-AR and Mz-AchR in myocardial cells of rats exposed to microwave radiation. Immunohistochemistry, Western blot and image analysis were used to detect the expression of ~I-AR and Mz-AchR in myocardial cells at 7 and 14 d after microwave exposure. The results show that the expression level was higher in microwave exposure group and 0.75 g/（kg.d） ADL group than in sham operation group and significantly lower in 1.5 and 3.0 g/（kg.d） ADL groups than in microwave group. So we have a conclusion that the expression of I^z-AR and Mz-AchR is down-regulated in myocardial cells of rats exposed to microwave radiation. ADL can protect rats against microwave-induced heart tissue injury.展开更多
Objective To study the effect of β3 adrenergic receptor （β3AR） Trp64Arg and peroxisome proliferator activated receptor gamma 2 （PPAR72） Prol2Ala polymorphisms on insulin resistance. Methods One hundred and eight...Objective To study the effect of β3 adrenergic receptor （β3AR） Trp64Arg and peroxisome proliferator activated receptor gamma 2 （PPAR72） Prol2Ala polymorphisms on insulin resistance. Methods One hundred and eight dizygotic twin pairs were enrolled in this study. Microsatellite polymorphism was used to diagnose zygosity of twins. Insulin sensitivity was estimated with logarithm transformed homeostasis model assessment （HOMA）. PCR-RFLP analysis was performed to detect the variants. As a supplement to the sib-pair method, identity by state （IBS） was used to analyze the association of polymorphisms with insulin sensitivity. Results The genotype frequencies of Trp64Trg, Trp64Arg, and Arg64Arg were 72.3%, 23.8%, and 3.9%, respectively, while the genotype frequencies of Pro12Pro, Pro12Ala, and Ala12Ala were 89.9%, 9.6%, and 0.5%, respectively. For β3AR Trp64Arg the interclass co-twin correlations of Waist-to-hip ratio （WHR）, blood glucose （GLU）, and insulin （INS）, homeostasis model assessment insulin resistance index （HOMA-IR） of the twin pairs sharing 2 alleles of IBS were greater than those sharing 0-1 allele of IBS, and HOMA4R had statistic significance. For PPAR3t2 Prol2Ala most traits of twin pairs sharing 2 alleles of IBS had greater correlations and statistic significance in body mass index （BMI）, WHR, percent of body fat （PBF） and GLU, but there were low correlations of either insulin or HOMA-IR of twin pairs sharing 1 or 2 alleles of IBS. The combined effects of the two variations showed less squared significant twin-pair differences of INS and HOMA-IR among twins sharing 4 alleles of IBS. Condusions β3AR Trp64Arg and PPAR）,2 Pro 12Ala polymorphisms might be associated with insulin resistance and obesity, and there might be slight synergistic effects between this two gene loci, and further studies are necessary to confirm this finding.展开更多
Dendrite ramification affects synaptic strength and plays a crucial role in memory. Previous studies revealed a correlation between beta 2-adrenergic receptor dysfunction and Alzheimer＇s disease （AD）, although the ...Dendrite ramification affects synaptic strength and plays a crucial role in memory. Previous studies revealed a correlation between beta 2-adrenergic receptor dysfunction and Alzheimer＇s disease （AD）, although the mechanism involved is still poorly understood. The current study investigated the potential effect of the selective β2-adrenergic receptor antagonist, ICI 118551 （ICI）, on Aβ deposits and AD-related cognitive impairment. Morris water maze test results demonstrated that the performance of AD-transgenic （TG） mice treated with ICI （AD-TG/ICI） was significantly poorer compared with NaCl-treated AD-TG mice （AD-TG/NaCl）, suggesting that β2-adrenergic receptor blockage by ICI might reduce the learning and memory abilities of mice. Golgi staining and immunohistochemical staining revealed that blockage of the β2-adrenergic receptor by ICI treatment decreased the number of dendritic branches, and ICI treatment in AD-TG mice decreased the expression of hippocampal synaptophysin and synapsin 1. Western blot assay results showed that the blockage of β2-adrener- gic receptor increased amyloid-β accumulation by downregulating hippocampal a-secretase activity and increasing the phosphorylation of amyloid precursor protein. These findings suggest that blocking the β2-adrenergic receptor inhibits dendrite ramification of hippocampal neurons in a mouse model of AD.展开更多
AIM To study the morphology of the enteric nervous system and the expression of beta-2 adrenergic(B2A) receptors in primary colorectal cancer.METHODS In this study, we included forty-eight patients with primary colore...AIM To study the morphology of the enteric nervous system and the expression of beta-2 adrenergic(B2A) receptors in primary colorectal cancer.METHODS In this study, we included forty-eight patients with primary colorectal cancer and nine patients for control tissue from the excision of a colonic segment for benign conditions. We determined the clinicopathological features and evaluated the immunohistochemical expression pattern of B2 A receptors as well as the morphological changes of the enteric nervous system(ENS). In order to assess statistical differences, we used the student t-test for comparing the means of two groups and one-way analysis of variance with Bonferroni's post hoc analysis for comparing the means of more than two groups. Correlations were assessed using the Pearson's correlation coefficient.RESULTS B2 A receptors were significantly associated with tumor grading, tumor size, tumor invasion, lymph node metastasis(P < 0.05), while there were no statistically significant associations with gender, CRC location and gross appearance(P > 0.05). We observed, on one hand, a decrease of the relative area for both Auerbach and Meissner plexuses with the increase of the tumor grading, and on the other hand, an increase of the relative area of other nervous elements not in the Meissner plexus or in the Auerbach plexus with the tumor grading. For G1 tumors we found that epithelial B2 A area showed an inverse correlation with the Auerbach plexus areas [r(14) =-0.531, P < 0.05], while for G2 tumors, epithelial B2 A areas showed an indirect variation with both the Auerbach plexus areas [r(14) =-0.453, P < 0.05] and the Meissner areas [r(14) =-0.825, P < 0.01]. For G3 tumors, the inverse dependence increased for both Auerbach [r(14) =-0.587, P < 0.05] and Meissner [r(14) =-0.934, P < 0.05] plexuses.CONCLUSION B2 A receptors play an important role in colorectal carcinogenesis and can be utilized as prognostic factors. Furthermore, study of the ENS in colorectal cancer may lead to targeted molecular therapies.展开更多
Objectives To investigate the effects of β2-adrenergic antagonist on cytosolic Ca^2 ＋ （[Ca^2＋ ]i） in ventricular myocytes from infarcted rat heart. Methods A ligature was placed around left anterior descending co...Objectives To investigate the effects of β2-adrenergic antagonist on cytosolic Ca^2 ＋ （[Ca^2＋ ]i） in ventricular myocytes from infarcted rat heart. Methods A ligature was placed around left anterior descending coronary artery of rat hearts. Rats in the control group were sham-operated. Cardiomyocytes were dissociated at two, four, eight weeks after myocardial infarction （MI） and [Ca^2＋]i was measured via fura-2 fluorescence. The response of cardiomyocytes to isoproterenol in presence or absence of betal-adrenergic antagonist atenolol, beta2-adrenergic antagonist ICI118, 551 or non-selective β1, 2- adrenergic antagonists propranolol was examined. Results The followings were found that ICI 118, 551 had no significant effects on the rise of [Ca^2＋]i induced by isoproterenol in normal ventricular myocytes （P 〉 0.05）, ICI118, 551 only significantly attenuated the rise of [Ca^2＋]i induced by isoproterenol at four weeks and eight weeks after MI （24.5%±5.7% vs 57.8% ± 13.2%, P〈 0.01; 12.2%±7.9% vs 44.6%±11.3%, P〈 0.01）. Atenolol had suppressive effects only in the control group and the post-MI group of two weeks （P 〈 0.05）, and propranolol had suppressive effects in the control and all the three post-MI groups （P 〈 0.01）. Conclusions Beta2-adrenergic antagonist ICI118, 551 may exert negative effects on Ca^2＋ overload initiated by sympathetic stimulation after MI.展开更多
目的:观察Β2肾上腺素受体拮抗剂对心肌梗死后心肌细胞胞浆游离CA2+浓度([CA2+]I)的影响。方法:结扎冠状动脉,复制大鼠心肌梗死模型。随机分为心肌梗死后2、4、8周组,正常对照组作假手术。分离大鼠心肌细胞,每组大鼠制备20份样品,再随...目的:观察Β2肾上腺素受体拮抗剂对心肌梗死后心肌细胞胞浆游离CA2+浓度([CA2+]I)的影响。方法:结扎冠状动脉,复制大鼠心肌梗死模型。随机分为心肌梗死后2、4、8周组,正常对照组作假手术。分离大鼠心肌细胞,每组大鼠制备20份样品,再随机分为4小组,分别给予Β2受体拮抗剂ICI118,551、Β1受体拮抗剂阿替洛尔、非选择性Β受体拮抗剂普萘洛尔后,用FURA-2荧光技术测定心肌细胞[C2+]I。结果:心肌梗死后4、8周,ICI118, 551组心肌细胞[CA2+]I增幅显著低于异丙肾上腺素组(24．5％±5．7％ VS 57．8％±13．2％,P<0．01;12．2％±7．9％ VS 44．6％±11．3%, P<0．01);正常对照组和心肌梗死后2周,上述两组心肌细胞[CA2+]I增幅无显著差异(P> 0．05)。正常对照组和心肌梗死后2周,阿替洛尔组心肌细胞[CA2+]I增幅显著低于异丙肾上腺素组(P<0．05);正常对照组及心肌梗死后2、4、8周,普萘洛尔组心肌细胞[CA2+]I增幅均显著低于异丙肾上腺素组(P<0．05)。结论:Β2 受体拮抗剂对于有效抑制心肌梗死后交感神经激动引起的心肌细胞内钙超载可能起重要作用。展开更多
文摘This paper is aimed to study the effect of ADL on expression of ~z-AR and Mz-AchR in myocardial cells of rats exposed to microwave radiation. Immunohistochemistry, Western blot and image analysis were used to detect the expression of ~I-AR and Mz-AchR in myocardial cells at 7 and 14 d after microwave exposure. The results show that the expression level was higher in microwave exposure group and 0.75 g/（kg.d） ADL group than in sham operation group and significantly lower in 1.5 and 3.0 g/（kg.d） ADL groups than in microwave group. So we have a conclusion that the expression of I^z-AR and Mz-AchR is down-regulated in myocardial cells of rats exposed to microwave radiation. ADL can protect rats against microwave-induced heart tissue injury.
基金This study was supported by the National Natural Science Foundation of China (30371223)the Major State Basic Research Development Program of China (2001CB510310).
文摘Objective To study the effect of β3 adrenergic receptor （β3AR） Trp64Arg and peroxisome proliferator activated receptor gamma 2 （PPAR72） Prol2Ala polymorphisms on insulin resistance. Methods One hundred and eight dizygotic twin pairs were enrolled in this study. Microsatellite polymorphism was used to diagnose zygosity of twins. Insulin sensitivity was estimated with logarithm transformed homeostasis model assessment （HOMA）. PCR-RFLP analysis was performed to detect the variants. As a supplement to the sib-pair method, identity by state （IBS） was used to analyze the association of polymorphisms with insulin sensitivity. Results The genotype frequencies of Trp64Trg, Trp64Arg, and Arg64Arg were 72.3%, 23.8%, and 3.9%, respectively, while the genotype frequencies of Pro12Pro, Pro12Ala, and Ala12Ala were 89.9%, 9.6%, and 0.5%, respectively. For β3AR Trp64Arg the interclass co-twin correlations of Waist-to-hip ratio （WHR）, blood glucose （GLU）, and insulin （INS）, homeostasis model assessment insulin resistance index （HOMA-IR） of the twin pairs sharing 2 alleles of IBS were greater than those sharing 0-1 allele of IBS, and HOMA4R had statistic significance. For PPAR3t2 Prol2Ala most traits of twin pairs sharing 2 alleles of IBS had greater correlations and statistic significance in body mass index （BMI）, WHR, percent of body fat （PBF） and GLU, but there were low correlations of either insulin or HOMA-IR of twin pairs sharing 1 or 2 alleles of IBS. The combined effects of the two variations showed less squared significant twin-pair differences of INS and HOMA-IR among twins sharing 4 alleles of IBS. Condusions β3AR Trp64Arg and PPAR）,2 Pro 12Ala polymorphisms might be associated with insulin resistance and obesity, and there might be slight synergistic effects between this two gene loci, and further studies are necessary to confirm this finding.
基金supported by the Key Laboratory of Brain Disease Bioinformation of Jiangsu Province of China,No.Jsbl1202
文摘Dendrite ramification affects synaptic strength and plays a crucial role in memory. Previous studies revealed a correlation between beta 2-adrenergic receptor dysfunction and Alzheimer＇s disease （AD）, although the mechanism involved is still poorly understood. The current study investigated the potential effect of the selective β2-adrenergic receptor antagonist, ICI 118551 （ICI）, on Aβ deposits and AD-related cognitive impairment. Morris water maze test results demonstrated that the performance of AD-transgenic （TG） mice treated with ICI （AD-TG/ICI） was significantly poorer compared with NaCl-treated AD-TG mice （AD-TG/NaCl）, suggesting that β2-adrenergic receptor blockage by ICI might reduce the learning and memory abilities of mice. Golgi staining and immunohistochemical staining revealed that blockage of the β2-adrenergic receptor by ICI treatment decreased the number of dendritic branches, and ICI treatment in AD-TG mice decreased the expression of hippocampal synaptophysin and synapsin 1. Western blot assay results showed that the blockage of β2-adrener- gic receptor increased amyloid-β accumulation by downregulating hippocampal a-secretase activity and increasing the phosphorylation of amyloid precursor protein. These findings suggest that blocking the β2-adrenergic receptor inhibits dendrite ramification of hippocampal neurons in a mouse model of AD.
基金Supported by the Romanian National Authority for Scientific Research and Innovation,CNCS-UEFISCDI,project No.PN-IIRU-TE-2014-4-0582,contract No.160/01.10.2015
文摘AIM To study the morphology of the enteric nervous system and the expression of beta-2 adrenergic(B2A) receptors in primary colorectal cancer.METHODS In this study, we included forty-eight patients with primary colorectal cancer and nine patients for control tissue from the excision of a colonic segment for benign conditions. We determined the clinicopathological features and evaluated the immunohistochemical expression pattern of B2 A receptors as well as the morphological changes of the enteric nervous system(ENS). In order to assess statistical differences, we used the student t-test for comparing the means of two groups and one-way analysis of variance with Bonferroni's post hoc analysis for comparing the means of more than two groups. Correlations were assessed using the Pearson's correlation coefficient.RESULTS B2 A receptors were significantly associated with tumor grading, tumor size, tumor invasion, lymph node metastasis(P < 0.05), while there were no statistically significant associations with gender, CRC location and gross appearance(P > 0.05). We observed, on one hand, a decrease of the relative area for both Auerbach and Meissner plexuses with the increase of the tumor grading, and on the other hand, an increase of the relative area of other nervous elements not in the Meissner plexus or in the Auerbach plexus with the tumor grading. For G1 tumors we found that epithelial B2 A area showed an inverse correlation with the Auerbach plexus areas [r(14) =-0.531, P < 0.05], while for G2 tumors, epithelial B2 A areas showed an indirect variation with both the Auerbach plexus areas [r(14) =-0.453, P < 0.05] and the Meissner areas [r(14) =-0.825, P < 0.01]. For G3 tumors, the inverse dependence increased for both Auerbach [r(14) =-0.587, P < 0.05] and Meissner [r(14) =-0.934, P < 0.05] plexuses.CONCLUSION B2 A receptors play an important role in colorectal carcinogenesis and can be utilized as prognostic factors. Furthermore, study of the ENS in colorectal cancer may lead to targeted molecular therapies.
文摘Objectives To investigate the effects of β2-adrenergic antagonist on cytosolic Ca^2 ＋ （[Ca^2＋ ]i） in ventricular myocytes from infarcted rat heart. Methods A ligature was placed around left anterior descending coronary artery of rat hearts. Rats in the control group were sham-operated. Cardiomyocytes were dissociated at two, four, eight weeks after myocardial infarction （MI） and [Ca^2＋]i was measured via fura-2 fluorescence. The response of cardiomyocytes to isoproterenol in presence or absence of betal-adrenergic antagonist atenolol, beta2-adrenergic antagonist ICI118, 551 or non-selective β1, 2- adrenergic antagonists propranolol was examined. Results The followings were found that ICI 118, 551 had no significant effects on the rise of [Ca^2＋]i induced by isoproterenol in normal ventricular myocytes （P 〉 0.05）, ICI118, 551 only significantly attenuated the rise of [Ca^2＋]i induced by isoproterenol at four weeks and eight weeks after MI （24.5%±5.7% vs 57.8% ± 13.2%, P〈 0.01; 12.2%±7.9% vs 44.6%±11.3%, P〈 0.01）. Atenolol had suppressive effects only in the control group and the post-MI group of two weeks （P 〈 0.05）, and propranolol had suppressive effects in the control and all the three post-MI groups （P 〈 0.01）. Conclusions Beta2-adrenergic antagonist ICI118, 551 may exert negative effects on Ca^2＋ overload initiated by sympathetic stimulation after MI.
文摘目的:观察Β2肾上腺素受体拮抗剂对心肌梗死后心肌细胞胞浆游离CA2+浓度([CA2+]I)的影响。方法:结扎冠状动脉,复制大鼠心肌梗死模型。随机分为心肌梗死后2、4、8周组,正常对照组作假手术。分离大鼠心肌细胞,每组大鼠制备20份样品,再随机分为4小组,分别给予Β2受体拮抗剂ICI118,551、Β1受体拮抗剂阿替洛尔、非选择性Β受体拮抗剂普萘洛尔后,用FURA-2荧光技术测定心肌细胞[C2+]I。结果:心肌梗死后4、8周,ICI118, 551组心肌细胞[CA2+]I增幅显著低于异丙肾上腺素组(24．5％±5．7％ VS 57．8％±13．2％,P<0．01;12．2％±7．9％ VS 44．6％±11．3%, P<0．01);正常对照组和心肌梗死后2周,上述两组心肌细胞[CA2+]I增幅无显著差异(P> 0．05)。正常对照组和心肌梗死后2周,阿替洛尔组心肌细胞[CA2+]I增幅显著低于异丙肾上腺素组(P<0．05);正常对照组及心肌梗死后2、4、8周,普萘洛尔组心肌细胞[CA2+]I增幅均显著低于异丙肾上腺素组(P<0．05)。结论:Β2 受体拮抗剂对于有效抑制心肌梗死后交感神经激动引起的心肌细胞内钙超载可能起重要作用。
