To detect the effects of the polyclonal antibodies raised in sheep against porcine adipocyte plasma membranes on the porcine carcass composition and meat quality, 30 pigs assigned into 6 treatment groups were given in...To detect the effects of the polyclonal antibodies raised in sheep against porcine adipocyte plasma membranes on the porcine carcass composition and meat quality, 30 pigs assigned into 6 treatment groups were given intraperitoneal injections of sheep antipig adipocyte plasma membrane immunoglobulin （ASIg） or sheep nonimmune serum immunoglobulin （NSIg）. At the end of the experiment, the pigs were slaughtered at 90 kg body weight, and carcasses and meat quality were evaluated. The results showed that when pigs intraperitoneally immunized with 20 or 30 mg ASIg at 15 kg body weight, 20 mg purified ASIg twice at 15 and 60 kg body weight, or 20 mg purified ASIg at 60 kg body weight, respectively, their lean meat percentage, fat meat percentage, backfat thickness, loin eye area leaf fat weight, caul fat weight, heart weight, liver weight, and kidney weight were significantly affected. However, the kidney weight, lurrg weight, dressing percentage, and spleen weight did not remarkably change. Our results indicated that pigs intraperitoneally immunized with 20 or 30 mg ASIg at 15 kg body weight, and 20 mg ASIg twice at 15 and 60 kg body weight, have significantly different drip loss rate, cooked meat ratio, tenderness, storage loss rate, muscle fiber diameter, moisture content, dry matter content, crude protein content, and crude fat content from the control group that received 20 mg NSIg at 15 kg body weight. However, meat pH, meat color value, meat marbling score, inosinate, and myohemoglobin were not significantly affected. Our results indicated ASIg could not significantly affect the content of most muscular amino acids and intramuscular fatty acids.展开更多
Porcine skeletal muscle genes play a major role in determining muscle growth and meat quality. Construction of a full-length cDNA library is an effective way to understand the expression of functional genes in muscle ...Porcine skeletal muscle genes play a major role in determining muscle growth and meat quality. Construction of a full-length cDNA library is an effective way to understand the expression of functional genes in muscle tissues. In addition, novel genes for further research could be identified in the library. In this study, we constructed a full-length cDNA library from porcine muscle tissue. The estimated average size of the cDNA inserts was 1 076 bp, and the cDNA fullness ratio was 86.2%. A total of 1 058 unique sequences with 342 contigs （32.3%） and 716 singleton （67.7%） expressed sequence tags （EST） were obtained by clustering and assembling. Meanwhile, 826 （78.1%） ESTs were categorized as known genes, and 232 （21.9%） ESTs were categorized as unknown genes. 65 novel porcine genes that exhibit no identity in the TIGR gene index of Sus scrofa and 124 full-length sequences with unknown functions were deposited in the dbEST division of GenBank （accession numbers： EU650784-EU650788, GE843306, GH228978-GH229100）. The abundantly expressed genes in porcine muscle tissue were related to muscle fiber development, energy metabolism and protein synthesis. Gene ontology analysis showed that sequences expressed in porcine muscle tissue contained a high percentage of binding activity, catalytic activity, structural molecule activity and motor activity, which involved mainly in metabolic, cellular and developmental process, distributed mainly in intracellular region. The sequence data generated in this study would provide valuable information for identifying porcine genes expressed in muscle tissue and help to advance the study on the structure and function of genes in pigs.展开更多
The present study was to investigate the effect of monoclonal antibody against porcine 40-kDa adipocyte-specific membrane protein on endocrine secretion in pigs, in order to provide the evidence for application of thi...The present study was to investigate the effect of monoclonal antibody against porcine 40-kDa adipocyte-specific membrane protein on endocrine secretion in pigs, in order to provide the evidence for application of this antibody to reduce excessive fat deposition in pig production. 40 Landrace×Saba pigs were randomly divided into 8 groups： 2 control groups were given saline with 10 mL, respectively, and the 6 treatment groups were given monoclonal antibody against porcine 40-kDa adipocyte-specific membrane protein with 0.1, 0.5, and 1.0 mg ·kg^-1 body weight at 15 or 60 kg body weight, respectively, all treatments were performed by intraperitoneal injection. The results showed that this monoclonal antibody could significantly reduce serum insulin level and increase levels of serum growth hormone （GH）, insulin-like growth factor-1（IGF-1）, triiodothyronine （T3）, and tetraiodothyronine （T4） either at 15 or 60 kg body weight injection. However, more marked effect was observed at 15 kg body weight treatment. Moreover, the dose-dependent effect of this monoclonal antibody on endocrine secretion was also observed. This result revealed that this monoclonal antibody increased secretion of hormones regulating fat lysis and reduced secretion of hormones regulating fat synthesis, suggests the reduction of porcine excessive fat deposition by this monoclonal antibody was carried out through affecting hormones regulating fat metabolism.展开更多
This study was to investigate the regulation of monoclonal antibodies against adipocyte membrane proteins （McAb） on lipid metabolism in pigs. Forty Landrace x Saba pigs were randomly divided into eight groups; the c...This study was to investigate the regulation of monoclonal antibodies against adipocyte membrane proteins （McAb） on lipid metabolism in pigs. Forty Landrace x Saba pigs were randomly divided into eight groups; the control group was given 10 mL saline and the treat groups were given monoclonal antibody against adipocyte-specific membrane protein with 0.1, 0.5, and 1.0 mg kg-I body weight at 15 and 60 kg body weight, respectively, by intraperitoneal injection. The results showed that McAb could increase, significantly, serum lipoprotein lipase activity and reduce serum nonesterified fatty acid （NEFA） content. Meanwhile, McAb increased content of serum lipid, triglyceride （TG）, cholesterol （CHO）, high density lipoprotein （HDL）, and low density lipoprotein （LDL） both at 15 and 60 kg body weight. However, McAb affected more significantly the lipid metabolism at 15 kg body weight than at 60 kg body weight. Moreover, this effect of McAb on lipid metabolism exhibited dose-dependent effect. These results suggested that this monoclonal antibody increased lipase activity, promoted lipolysis, and utilization of lipid so that McAb could be applied to restrain excessive fat deposition in porcine production through the regulation of fat metabolism.展开更多
The biological chemistry would be responsible for the meat quality. This study tried to investigate the transcript expression profile and explain the characteristics of differentially expressed genes between the Wujin...The biological chemistry would be responsible for the meat quality. This study tried to investigate the transcript expression profile and explain the characteristics of differentially expressed genes between the Wujin and Landrace pigs. The results showed that 526 differentially expressed genes were found by comparing the transcript expression profile of muscle tissue between Wujin and Landrace pigs. Among them, 335 genes showed up-regulations and 191 genes showed down-regulations in Wujin pigs compared with the Landrace pigs. Gene ontology （GO） analysis indicated that the differentially expressed genes were clustered into three groups involving in protein synthesis, energy metabolism and immune response. Kyoto encyclopedia of genes and genomes （KEGG） pathway analysis found that these differentially expressed genes participated in protein synthesis metabolism, energy metabolism and immune response pathway. The Database for Annotation, Visualization and Integrated Discovery （DAVID） analysis of protein function and protein domains function also confirmed that differentially expressed genes belonged to protein synthesis, energy metabolism and immune response. Genes related protein synthesis metabolism pathway in Landrace was higher than in Wujin pigs. However, differentially expressed genes related energy metabolism and immune response was up-regulated in Wujin pigs compared with Landrace pigs. Quantitative real-time RT-PCR on selected genes was used to confirm the results from the microarray. These suggested that the genes related to protein synthesis, energy metabolism and immune response would contribute to the growth performance, meat quality as well as anti-disease capacity.展开更多
We revisit the spin effects induced by thermal vorticity by calculating them directly from the spin-dependent distribution functions.For spin-1/2 particles,we provide the polarization up to the first order of thermal ...We revisit the spin effects induced by thermal vorticity by calculating them directly from the spin-dependent distribution functions.For spin-1/2 particles,we provide the polarization up to the first order of thermal vorticity and compare it with the usual results calculated from the spin vector.For spin-1 particles,we show that all the non-diagonal elements vanish and there is no spin alignment up to the first order of thermal vortcity.We present the spin alignment at second-order contribution from thermal vorticity.We also show that the spin effects for both Dirac and vector particles receive an extra contribution when the spin direction is associated with the momentum of the particle.展开更多
目的:基于PI3K/AKT/mTOR信号通路探讨人参皂苷CK对Aβ42活化小胶质(BV2)细胞抗炎及Aβ寡聚体吞噬作用机制。方法:利用10μm o l/L Aβ42寡聚体作用BV2细胞建立小胶质细胞活化模型,通过细胞实时监测系统观察人参皂苷CK对BV2细胞活力的影...目的:基于PI3K/AKT/mTOR信号通路探讨人参皂苷CK对Aβ42活化小胶质(BV2)细胞抗炎及Aβ寡聚体吞噬作用机制。方法:利用10μm o l/L Aβ42寡聚体作用BV2细胞建立小胶质细胞活化模型,通过细胞实时监测系统观察人参皂苷CK对BV2细胞活力的影响;利用免疫荧光技术检测人参皂苷CK对BV2细胞介导Aβ吞噬能力,以及对BV2细胞不同表型标志物CD68、CD206蛋白的调控能力;通过ELISA技术测定人参皂苷CK对BV2细胞外Aβ42表达量的影响以及对炎症因子IL-4、IL-6分泌的调控水平;利用Western Blotting技术检测人参皂苷CK对BV2细胞内PI3K/A K T/m T OR信号通路相关蛋白表达的调控能力。结果:与空白组比较,模型组BV2细胞信号值降低,BV2细胞内Aβ42荧光表达强度显著减少(P<0.05),BV2细胞外Aβ42蛋白含量显著增多(P<0.05),BV2细胞内CD68的表达水平显著增加(P<0.05),CD206的表达水平显著降低(P<0.05),BV2细胞IL-4分泌水平显著降低(P<0.05),IL-6分泌水平显著升高(P<0.05);与模型组比较,不同剂量人参皂苷CK作用后,BV2细胞信号值升高,BV2细胞Aβ荧光表达强度显著增加(P<0.05),BV2细胞外Aβ蛋白含量显著降低(P<0.05),BV2细胞内CD68表达水平显著降低(P<0.05),CD206表达水平显著增加(P<0.05),BV2细胞IL-4分泌水平显著升高(P<0.05),IL-6分泌水平显著降低(P<0.05)。结论:人参皂苷CK通过PI3K/AKT/mTOR信号通路,增加BV2细胞对Aβ的吞噬能力,促进活化BV2细胞由M1表型向M2表型极化能力,抑制炎症反应的产生。展开更多
基金the grants from the Key Project of Natural Science Foundation of Yunnan Province, China （2000C005Z） the National NaturzA Science Foundation of China （30260079）.
文摘To detect the effects of the polyclonal antibodies raised in sheep against porcine adipocyte plasma membranes on the porcine carcass composition and meat quality, 30 pigs assigned into 6 treatment groups were given intraperitoneal injections of sheep antipig adipocyte plasma membrane immunoglobulin （ASIg） or sheep nonimmune serum immunoglobulin （NSIg）. At the end of the experiment, the pigs were slaughtered at 90 kg body weight, and carcasses and meat quality were evaluated. The results showed that when pigs intraperitoneally immunized with 20 or 30 mg ASIg at 15 kg body weight, 20 mg purified ASIg twice at 15 and 60 kg body weight, or 20 mg purified ASIg at 60 kg body weight, respectively, their lean meat percentage, fat meat percentage, backfat thickness, loin eye area leaf fat weight, caul fat weight, heart weight, liver weight, and kidney weight were significantly affected. However, the kidney weight, lurrg weight, dressing percentage, and spleen weight did not remarkably change. Our results indicated that pigs intraperitoneally immunized with 20 or 30 mg ASIg at 15 kg body weight, and 20 mg ASIg twice at 15 and 60 kg body weight, have significantly different drip loss rate, cooked meat ratio, tenderness, storage loss rate, muscle fiber diameter, moisture content, dry matter content, crude protein content, and crude fat content from the control group that received 20 mg NSIg at 15 kg body weight. However, meat pH, meat color value, meat marbling score, inosinate, and myohemoglobin were not significantly affected. Our results indicated ASIg could not significantly affect the content of most muscular amino acids and intramuscular fatty acids.
基金supported by the National Basic Research Program of China(2007CB116201)
文摘Porcine skeletal muscle genes play a major role in determining muscle growth and meat quality. Construction of a full-length cDNA library is an effective way to understand the expression of functional genes in muscle tissues. In addition, novel genes for further research could be identified in the library. In this study, we constructed a full-length cDNA library from porcine muscle tissue. The estimated average size of the cDNA inserts was 1 076 bp, and the cDNA fullness ratio was 86.2%. A total of 1 058 unique sequences with 342 contigs （32.3%） and 716 singleton （67.7%） expressed sequence tags （EST） were obtained by clustering and assembling. Meanwhile, 826 （78.1%） ESTs were categorized as known genes, and 232 （21.9%） ESTs were categorized as unknown genes. 65 novel porcine genes that exhibit no identity in the TIGR gene index of Sus scrofa and 124 full-length sequences with unknown functions were deposited in the dbEST division of GenBank （accession numbers： EU650784-EU650788, GE843306, GH228978-GH229100）. The abundantly expressed genes in porcine muscle tissue were related to muscle fiber development, energy metabolism and protein synthesis. Gene ontology analysis showed that sequences expressed in porcine muscle tissue contained a high percentage of binding activity, catalytic activity, structural molecule activity and motor activity, which involved mainly in metabolic, cellular and developmental process, distributed mainly in intracellular region. The sequence data generated in this study would provide valuable information for identifying porcine genes expressed in muscle tissue and help to advance the study on the structure and function of genes in pigs.
基金supported by the National Natural Science Foundation of China(30260079)the Key Project of the Natural Science Foundation of Yunnan Province,China(2000C0005Z)
文摘The present study was to investigate the effect of monoclonal antibody against porcine 40-kDa adipocyte-specific membrane protein on endocrine secretion in pigs, in order to provide the evidence for application of this antibody to reduce excessive fat deposition in pig production. 40 Landrace×Saba pigs were randomly divided into 8 groups： 2 control groups were given saline with 10 mL, respectively, and the 6 treatment groups were given monoclonal antibody against porcine 40-kDa adipocyte-specific membrane protein with 0.1, 0.5, and 1.0 mg ·kg^-1 body weight at 15 or 60 kg body weight, respectively, all treatments were performed by intraperitoneal injection. The results showed that this monoclonal antibody could significantly reduce serum insulin level and increase levels of serum growth hormone （GH）, insulin-like growth factor-1（IGF-1）, triiodothyronine （T3）, and tetraiodothyronine （T4） either at 15 or 60 kg body weight injection. However, more marked effect was observed at 15 kg body weight treatment. Moreover, the dose-dependent effect of this monoclonal antibody on endocrine secretion was also observed. This result revealed that this monoclonal antibody increased secretion of hormones regulating fat lysis and reduced secretion of hormones regulating fat synthesis, suggests the reduction of porcine excessive fat deposition by this monoclonal antibody was carried out through affecting hormones regulating fat metabolism.
基金This work is supported by the grants from the Natural Science Foundation Key Project of Yunnan Province,China(2000C005Z)the National Natural Science Foundation of China(30260079).
文摘This study was to investigate the regulation of monoclonal antibodies against adipocyte membrane proteins （McAb） on lipid metabolism in pigs. Forty Landrace x Saba pigs were randomly divided into eight groups; the control group was given 10 mL saline and the treat groups were given monoclonal antibody against adipocyte-specific membrane protein with 0.1, 0.5, and 1.0 mg kg-I body weight at 15 and 60 kg body weight, respectively, by intraperitoneal injection. The results showed that McAb could increase, significantly, serum lipoprotein lipase activity and reduce serum nonesterified fatty acid （NEFA） content. Meanwhile, McAb increased content of serum lipid, triglyceride （TG）, cholesterol （CHO）, high density lipoprotein （HDL）, and low density lipoprotein （LDL） both at 15 and 60 kg body weight. However, McAb affected more significantly the lipid metabolism at 15 kg body weight than at 60 kg body weight. Moreover, this effect of McAb on lipid metabolism exhibited dose-dependent effect. These results suggested that this monoclonal antibody increased lipase activity, promoted lipolysis, and utilization of lipid so that McAb could be applied to restrain excessive fat deposition in porcine production through the regulation of fat metabolism.
基金sponsored by the Yunnan Natural Science Foundation,China(2009CD056)the National Natural Science foundation of China(30660132,31060331 and 31260592)+1 种基金the Special Program for Key Basic Research of the Ministry of Science and Technology,China(2007CB116201)the National Key Program of Transgenic Project of China(2009ZX08009-140B)
文摘The biological chemistry would be responsible for the meat quality. This study tried to investigate the transcript expression profile and explain the characteristics of differentially expressed genes between the Wujin and Landrace pigs. The results showed that 526 differentially expressed genes were found by comparing the transcript expression profile of muscle tissue between Wujin and Landrace pigs. Among them, 335 genes showed up-regulations and 191 genes showed down-regulations in Wujin pigs compared with the Landrace pigs. Gene ontology （GO） analysis indicated that the differentially expressed genes were clustered into three groups involving in protein synthesis, energy metabolism and immune response. Kyoto encyclopedia of genes and genomes （KEGG） pathway analysis found that these differentially expressed genes participated in protein synthesis metabolism, energy metabolism and immune response pathway. The Database for Annotation, Visualization and Integrated Discovery （DAVID） analysis of protein function and protein domains function also confirmed that differentially expressed genes belonged to protein synthesis, energy metabolism and immune response. Genes related protein synthesis metabolism pathway in Landrace was higher than in Wujin pigs. However, differentially expressed genes related energy metabolism and immune response was up-regulated in Wujin pigs compared with Landrace pigs. Quantitative real-time RT-PCR on selected genes was used to confirm the results from the microarray. These suggested that the genes related to protein synthesis, energy metabolism and immune response would contribute to the growth performance, meat quality as well as anti-disease capacity.
基金Supported in part by the National Natural Science Foundation of China(12175123,11890710,11890713)the Major Program of Natural Science Foundation of ShandongProvince,China(ZR2020ZD30)。
文摘We revisit the spin effects induced by thermal vorticity by calculating them directly from the spin-dependent distribution functions.For spin-1/2 particles,we provide the polarization up to the first order of thermal vorticity and compare it with the usual results calculated from the spin vector.For spin-1 particles,we show that all the non-diagonal elements vanish and there is no spin alignment up to the first order of thermal vortcity.We present the spin alignment at second-order contribution from thermal vorticity.We also show that the spin effects for both Dirac and vector particles receive an extra contribution when the spin direction is associated with the momentum of the particle.
文摘目的:基于PI3K/AKT/mTOR信号通路探讨人参皂苷CK对Aβ42活化小胶质(BV2)细胞抗炎及Aβ寡聚体吞噬作用机制。方法:利用10μm o l/L Aβ42寡聚体作用BV2细胞建立小胶质细胞活化模型,通过细胞实时监测系统观察人参皂苷CK对BV2细胞活力的影响;利用免疫荧光技术检测人参皂苷CK对BV2细胞介导Aβ吞噬能力,以及对BV2细胞不同表型标志物CD68、CD206蛋白的调控能力;通过ELISA技术测定人参皂苷CK对BV2细胞外Aβ42表达量的影响以及对炎症因子IL-4、IL-6分泌的调控水平;利用Western Blotting技术检测人参皂苷CK对BV2细胞内PI3K/A K T/m T OR信号通路相关蛋白表达的调控能力。结果:与空白组比较,模型组BV2细胞信号值降低,BV2细胞内Aβ42荧光表达强度显著减少(P<0.05),BV2细胞外Aβ42蛋白含量显著增多(P<0.05),BV2细胞内CD68的表达水平显著增加(P<0.05),CD206的表达水平显著降低(P<0.05),BV2细胞IL-4分泌水平显著降低(P<0.05),IL-6分泌水平显著升高(P<0.05);与模型组比较,不同剂量人参皂苷CK作用后,BV2细胞信号值升高,BV2细胞Aβ荧光表达强度显著增加(P<0.05),BV2细胞外Aβ蛋白含量显著降低(P<0.05),BV2细胞内CD68表达水平显著降低(P<0.05),CD206表达水平显著增加(P<0.05),BV2细胞IL-4分泌水平显著升高(P<0.05),IL-6分泌水平显著降低(P<0.05)。结论:人参皂苷CK通过PI3K/AKT/mTOR信号通路,增加BV2细胞对Aβ的吞噬能力,促进活化BV2细胞由M1表型向M2表型极化能力,抑制炎症反应的产生。
