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1.
急性冷、热应激对肉鸡肝脏和心脏组织中HSPs表达的影响 总被引：2，自引：0，他引：2
将45只28日龄罗斯308肉鸡随机均分为三组进行急性应激处理:热应激组在急性热应激下持续饲养6 h(温度为39℃,湿度为90%);冷应激组在急性冷应激刺激下持续饲养6 h(温度为11℃,湿度为90%);对照组鸡群在正常饲养条件下饲养(温度为26℃,湿度为60%)。采用实时荧光定量PCR(q RT-PCR)分别对肝脏和心脏组织中的4种热应激蛋白基因(HSP60、HSP70、HSP90、HSP110)的表达量进行对比分析。结果表明:在心脏组织中,HSP60表达量在冷、热应激下均无显著变化(P0.05);HSP90表达在冷应激下显著下降(P0.05);HSP70表达在冷、热应激下均显著上升(P0.05、P0.01);HSP110表达在冷应激下无显著变化,在热应激下极显著上升(P0.01)。在肝脏组织中,HSP60在冷应激下表达量显著下降(P0.05),热应激下表达无显著变化(P0.05);HSP70和HSP110在热应激条件下表达量极显著上升(P0.01);HSP90表达量在冷、热应激下均无显著变化(P0.05)。结果揭示:急性热应激相比于急性冷应激对应激蛋白的表达影响更显著;在急性热应激条件下,心脏和肝脏组织中HSP70和HSP110表达量均极显著上升。 相似文献
2.
选择超数排卵后怀孕昆明小鼠75只,以注射人绒毛膜促性腺激素(hCG)后的胚胎发育阶段为标准,分别在合子、2细胞、4细胞、8~16细胞和囊胚期对孕鼠进行了37℃、39℃、41℃和43℃热应激4 h。热应激后取胚,用免疫荧光细胞化学法检验胚胎热休克蛋白70(HSP70)的诱导表达。结果表明,HSP70在4细胞以上胚胎内呈阳性表达,相对高温时其表达量增加,囊胚时最显著。可见,附植前早期胚胎HSP70的热诱导表达与细胞期和温度密切相关。 相似文献
3.
《中国畜牧杂志》2015,(9)
选取1日龄健康雁鹅60只,随机分为6组,单笼饲养于环控仓内。6周龄时,A组置于(22±1)℃作为对照,B、C、D、E、F组分别施于2、4、6、8 h和10 h(40±1)℃的急性热应激处理,处理后立即剖杀,取心、肝、肺和肾脏组织,实时荧光定量PCR测定HSP70 mRNA表达量,免疫组织化学方法测定HSP70表达量。结果表明:急性热应激处理可显著提高各组织中HSP70 mRNA及HSP70蛋白的表达水平,但不同组织出现显著变化的时间以及随热应激时间延长的变化规律存在差异。心脏组织HSP70 mRNA和蛋白表达量均在热应激2 h后出现显著升高(P0.05),热应激4 h后达到最高值,8 h后降至对照组水平,遵循二次曲线回归模式;肝脏热应激4~10 h间HSP70及其mRNA均显著高于对照组(P0.05),但未表现出显著的线性与二次回归趋势;肺脏HSP70 mRNA表达水平在热应激2~10 h间显著高于对照组(P0.05),HSP70则从热应激4 h起才显著升高,但二者随热应激时间延长均呈显著的线性升高规律;与肺相似,肾脏HSP70及其mRNA表达量随热应激时间的变化趋势也遵循线性回归模式,两者均在热应激4~10 h显著升高(P0.05)。 相似文献
4.
HSP70在急性热应激蛋鸭脾脏表达变化的研究 总被引：1，自引：0，他引：1
采用半定量RT-PCR与Western-blotting方法检测相同温度、不同时间(3、5、7h)热应激处理鸭脾脏组织中HSP70基因的表达水平,以研究热应激对HSP70基因表达的影响。结果表明:与对照组相比,热应激组蛋鸭脾脏HSP70 mRNA转录水平在热应激进行到3h时呈现下降趋势,但是差异不显著;而进行到5h时则出现显著(P0.05)的回升;热应激组蛋鸭脾脏HSP70蛋白表达水平在热应激进行到5h时出现显著下降(P0.05),表明急性热应激对蛋鸭脾脏组织HSP70基因表达具有重要影响。 相似文献
5.
选取24只8周龄健康的雌性昆明小白鼠并随机分成4组,Ⅰ组为对照组.尾静脉注射生理盐水,Ⅱ、Ⅲ、Ⅳ组分别注射不同剂量的Gln,注射后4h处死,取肝脏、子宫和卵巢.采用RT-PCR和Western Blot法检测HSP70 mRNA和HSP70的表达.试验结果表明.Gln注射组鼠组织中HSP70表达量均高于对照组,且HSP70表达量随着Gln注射量的增加而增加.Ⅱ组鼠肝脏、子宫和卵巢组织中HSP70蛋白表达量比对照组分别增加了9.49%、5.49%和4.84%(P>0.05);Ⅲ组鼠各组织中HSP70比对照组分别显著(P<0.05)增加了23.56%、21.10%和14.30%:Ⅳ组肝脏组织中HSP70比对照组显著增加了35.33%(P<0.05),子宫和卵巢比对照组分别极显著(P<0.01)增加了33.74%和33.77%.因此.Gln能诱导小鼠肝脏、子宫、卵巢组织细胞HSP70的表达,并且HSP70表达量随着Gln剂量的加大而增加. 相似文献
6.
用37℃2 h条件下体外培养的小鼠囊胚作为对照,将体外培养至囊胚期的小鼠胚胎分别施以38℃2 h、39℃2 h、40℃2 h的预热应激处理,以观察热休克蛋白70(HSP70)表达对高温所致胚胎损伤的影响。用W estern-b lot技术检测小鼠胚胎内HSP70的表达,然后分别将预热胚胎和对照组胚胎置于42℃高温下处理3 h,用台盼兰拒染法检测胚胎存活率,判断HSP70表达对胚胎抵抗高温损伤有无保护作用。结果显示:39℃热应激处理2 h后,HSP70表达量达到最高水平,与对照组差异极显著(P<0.01);38℃热应激处理2 h和40℃热应激处理2 h组HSP70表达与对照组相比均有显著(P<0.05)增加;预热诱导组胚胎存活率明显(P<0.05)高于对照组,其中以39℃2 h组最高。提示HSP70的高表达可以抵抗胚胎对外界不良因素的刺激。 相似文献
7.
将体外培养的小鼠囊胚分别施以38℃温和热应激和40℃强烈热应激处理1、2和3 h,然后在37℃正常培养条件下分别恢复3、2和1 h,用体视显微镜观察囊胚孵出率以及经38℃和40℃诱导热应激后囊胚的孵出率,用Western-blot技术检测小鼠囊胚HSP72的表达。结果,38℃热应激处理2 h时,HSP72表达量达到最高水平,与对照组差异显著;40℃热应激处理3 h时,HSP72表达量达到最高水平,与对照组差异不显著;38℃热诱导2 h囊胚孵出率最高,与40℃强烈热应激处理2 h组差异显著。结果表明,热诱导组囊胚孵出率与38℃热应激组囊胚HSP72的表达量呈正相关。 相似文献
8.
研究蛋鸭热应激条件下不同组织中热休克蛋白70(HSP70)基因mRNA表达规律,为揭示蛋鸭热应激反应机理提供参考。60只绍兴蛋鸭25℃饲养20d,其中30只进行40℃热应激处理1h,采取荧光定量PCR方法分别测定不同组织中HSP70mRNA的表达水平。试验组与对照组相比,肝脏、脾脏和胰腺组织HSP70mRNA表达差异不显著,其他6种组织HSP70基因表达量均有不同程度的增加,试验组心脏、腿肌、垂体、下丘脑、胸肌、肾脏中HSP70基因表达量分别高于对照组3.6倍、2.8倍、2.7倍、2.4倍、2.2倍和1.57倍。 相似文献
9.
《中国兽医杂志》2015,(6)
为了探讨不同浓度黄芩苷对热应激条件下猪肾小管上皮(LLC-PK1)细胞HSP70表达的影响,筛选出黄芩苷诱导热应激条件下细胞HSP70表达的最佳浓度。将培养的LLC-PK1细胞随机分为7个组,Ⅰ组为37℃常温对照组,Ⅱ组为42℃单纯热应激组,Ⅲ、Ⅳ、Ⅴ、Ⅵ组和Ⅶ组分别为42℃热应激并用不同浓度黄芩苷(0.01~100μg/m L)处理组,运用实时荧光定量PCR和Western Blot检测HSP70 m RNA及蛋白的表达。结果显示,42℃单纯热应激能显著诱导LLCPK1细胞HSP70的表达;一定浓度范围内的黄芩苷(0.1~10μg/m L)处理的LLC-PK1细胞HSP70表达显著高于42℃单纯热应激;黄芩苷(0.01~100μg/m L)能显著上调热应激条件下LLC-PK1细胞HSP70的表达,且1μg/m L的黄芩苷上调效果最显著。 相似文献
10.
本研究旨在确定体外培养的小鼠胚胎细胞合成HSP70的时期,研究热应激对该阶段胚胎细胞超微结构的影响.将合子和体外发育至2-细胞、4-细胞、8～16-细胞及囊胚阶段的胚胎分别进行37、39和41℃的热应激处理,用免疫荧光细胞化学法检测胚胎细胞中HSP70的诱导表达;将体外培养至早期囊胚的小鼠胚胎分别施以39℃2h和41℃2h处理,分别在热应激后0和2h时收集胚胎,制作超薄切片,用电子显微镜观察胚胎细胞的超微结构变化.在各细胞期胚胎中,37℃组胚胎HSP70表达阴性(一);39℃组胚胎,从8～16-细胞开始呈现弱表达(+),囊胚呈阳性表达(++);41℃组的胚胎从4-细胞开始呈现弱阳性表达(+),8～16-细胞胚胎和囊胚呈阳性表达(++).39和41℃热应激处理的小鼠早期囊胚超微结构和对照组均发生明显的变化,但经37℃恢复培养2h后,39℃组胚胎的各细胞器超微结构恢复正常,而41℃组胚胎未能恢复.结果表明,小鼠胚胎从4-细胞期有HSP70的诱导合成,在囊胚期诱导合成最多;热应激使胚胎亚细胞结构出现退行性变化,轻度退行性变化是可逆的. 相似文献
11.
探讨中药复方对慢性热应激下蛋鸡生产性能和心脏组织HSP70表达量的影响。选取250只60日龄蛋鸡,随机分为空白对照组、维生素C组、复方Ⅰ、复方Ⅱ、复方Ⅲ组。每天记录各组的耗料量、蛋重、产蛋量、淘死数以及软、破蛋数量,采用ELISA法测定蛋鸡心脏组织HSP70表达量。结果显示,中药复方能够改善热应激状态下蛋鸡的生产性能,其中复方Ⅱ的效果最佳;中药复方组蛋鸡心脏组织HSP70表达量均低于空白对照组,其中方Ⅱ组下降的幅度最大,表明各中药复方均能提高热应激蛋鸡的生产性能,其作用机制可能与调控HSP70表达量有关。 相似文献
12.
选择40头体质健康的中国荷斯坦奶牛,根据胎次和泌乳天数,按照随机区组试验设计分为Ⅰ组（30kg/d）、Ⅱ组（30～35kg/d）、Ⅲ组（35～40kg/d）和Ⅳ组（40kg/d）。热应激前、热应激前期、热应激中期、热应激后期和热应激后分别于尾静脉采血,用ELISA试剂盒测定热休克蛋白（HSP）27,70,90的表达量。结果显示,Ⅳ组HSP27表达量最高,Ⅱ组表达量最低,Ⅳ组、Ⅲ组和Ⅰ组均显著高于Ⅱ组（P〈0.05）。HSP70表达量各组间没有明显差异,但随产奶量呈线性增加（P〈0.05）。HSP90的表达量,Ⅳ组和Ⅲ组明显高于Ⅱ组（P〈0.05）。HSP27的表达量热应激后差异较大;HSP70的表达量各组整个过程差异较大;HSP90的表达量在热应激前、热应激前期和热应激后差异较大。总之,在热应激过程,高产奶牛血清中热应激蛋白的表达量较高,HSP70表达量随产奶量呈线性增加,而不同热应激蛋白的变化规律差异较大。 相似文献
13.
Purification, characterization and expression kinetics of heat shock protein 70 from Bubalus bubalis
Himadri Patir 《Research in veterinary science》2010,88(2):258-262
The present work on Bubalus bubalis (buffalo) was designed to study heat shock protein 70 (HSP70) induction in lymphocytes, its purification and characterization. HSP70 induction and expression kinetics at different temperatures and time durations were also studied. HSP70 purification was carried out by immunoaffinity chromatography using adenosine di-phosphate (ADP-agarose column) and the characterization of the purified protein was done using western blotting by mouse monoclonal anti-HSP70. The molecular weight of HSP70 of buffalo lymphocytes was found to be approximately of 68 kDa and was less than that of bovine brain HSP70. The purified HSP70 was assessed using indirect inhibition enzyme-linked immunosorbent assay (ELISA). A good amount of HSP70 (1430 ηg HSP70/100 μl) was recovered after purification, out of the total 2040.40 ηg of HSP70/100 μl of cell supernatant. To assess the impact of temperature and time dependent variability in the induction and expression pattern of HSP70, buffalo lymphocytes were subjected to three different temperature treatments, viz.: (I) 38 °C for 48 h and further exposed the same cells at 45 °C for 3 h, (II) 42 °C for 3 h, and (III) 45 °C for 3 h, respectively. The respective cell viability was found to be 68%, 63%, and 51%. The HSP70 levels were 58.30 ± 4.37, 42.59 ± 9.04 and 21.95 ± 6.79 ng/million cells, respectively, at three temperature exposures. The results indicates that higher intensity and duration of temperature exposure cause higher HSP70 induction in buffalo lymphocytes to maintain cellular homeostasis with a threshold of thermal dose for maximum HSP70 expression. However immediate induction of HSP70 in the lymphocytes was dependent on magnitude of thermal exposure (stress level) and time of thermal exposure (stress duration). The present study on HSP70 and its induction will help likely to solve the problems related to the present scenario of thermo-adaptability in buffaloes. 相似文献
14.
Mishra A Hooda OK Singh G Meur SK 《Journal of animal physiology and animal nutrition》2011,95(4):540-544
Heat stress in farm animals, such as cattle and buffalo during summer and post-summer seasons is a problem for livestock producers. The effect of heat stress becomes pronounced when heat stress is accompanied with ambient humidity impairing the immune status, growth, production and reproductive performance of animals. Increase in HSP70 levels from cell cultures in presence of different stressors often does not reflect the physiological adaptability of animals governing thermal regulation. In this study we directly compared the effect of different heat stress conditions with the immune status and HSP70 expression patterns from buffalo lymphocytes both in vivo and in vitro. Murrah buffalo calves were exposed to induced heat stress with two experimental treatments: hot-dry (42 °C with existing relative humidity) or hot humid (35 °C with 70% relative humidity) condition in psychometric chamber, 4 h daily for 12 days and compared with control animals maintained in an experimental shed under natural conditions. There was >200-fold increase in serum-HSP70 levels in both heat stress conditions compared with control. Furthermore, the immune status of the calves failed to activate the level of HSP70 expression in serum lymphocytes. Lymphocytes cultured in vitro at higher temperature exert 2.5-fold increase in HSP70 concentration. This study is the first of its kind to demonstrate more complex expression pattern of buffalo serum-HSP70 level as a thermo adaptive response compared with in vitro treated cells. Results from this study indicate that serum-HSP70 levels could be used as a sensitive biomarker for heat stress management in large farm animals. 相似文献
15.
《动物营养（英文）》2019,5(4):340-350
Heat stress induced by long periods of high ambient temperature decreases animal productivity, leading to heavy economic losses. This devastating situation for livestock production is even becoming worse under the present climate change scenario. Strategies focused to breed animals with better thermo-tolerance and climatic resilience are keenly sought these days to mitigate impacts of heat stress especially in high input livestock production systems. The 70-kDa heat shock proteins (HSP70) are a protein family known for its potential role in thermo-tolerance and widely considered as cellular thermometers. HSP70 function as molecular chaperons and have major roles in cellular thermotolerance, apoptosis, immune-modulation and heat stress. Expression of HSP70 is controlled by various factors such as, intracellular pH, cyclic adenosine monophosphate (cyclic AMP), protein kinase C and intracellular free calcium, etc. Over expression of HSP70 has been observed under oxidative stress leading to scavenging of mitochondrial reactive oxygen species and protection of pulmonary endothelial barrier against bacterial toxins. Polymorphisms in flanking and promoter regions in HSP70 gene have shown association with heat tolerance, weaning weight, milk production, fertility and disease susceptibility in livestock. This review provides insight into pivotal roles of HSP70 which make it an ideal candidate genetic marker for selection of animals with better climate resilience, immune response and superior performance. 相似文献
16.
Futoshi YAZAMA Haruki SATO Tomoko SONODA 《The Journal of reproduction and development》2015,61(5):399-406
An experimental ischemia (EI)-induced mouse model was used to
analyze pathological and biochemical alterations in testes. Initial
morphological changes were observed in Sertoli cells of EI testes at
the light microscopic level. Examination of the ultrastructure using
transmission electron microscopy confirmed that Sertoli cells were
partially detached from the basement membrane of the seminiferous
epithelium and that the cell membranes of adjacent Sertoli cells were
not joined. The functional integrity of the blood-testis barrier (BTB)
was assessed using the lanthanum tracer technique. Lanthanum had
penetrated into the spaces between adjacent Sertoli cells in the
adluminal compartment up to the lumen of the seminiferous epithelium
in EI testes. Proteome analysis showed that the expression of heat
shock protein (HSP) 70 was significantly upregulated in EI testes.
Western blot analysis confirmed that the expression of HSP70 increased
in a time-dependent manner after the EI procedure. HSP70
immunostaining was observed in spermatocytes and in round and
elongated spermatids in EI testes. Our results suggest that a change
in the junctions between adjacent Sertoli cells on the basal
compartment is involved in the BTB disruption in EI testes. Therefore,
male infertility caused by the BTB disruption could be associated with
heat stress induced by ischemia. 相似文献
17.
运输应激对山羊血清和空肠中HSP27、HSP70和HSP90含量的影响 总被引：1，自引：0，他引：1
《中国畜牧杂志》2019,(3)
为探讨运输应激对山羊血清和空肠中HSP27、HSP70和HSP90 3种热休克蛋白含量的影响,试验选取12只赣西山羊,随机分为对照组、运输应激2 h组和运输应激6 h组,应用双抗体夹心ELISA法测定山羊血清和空肠中3种热休克蛋白浓度。结果表明:与对照组相比,运输2 h山羊血清中HSP70和HSP90极显著升高(P<0.01),空肠中HSP70和HSP90显著升高(P<0.05),血清和空肠中HSP27有升高趋势(P>0.05);与对照组相比,运输6 h后血清中HSP70和HSP90分别极显著和显著升高(P<0.05和P<0.01),血清中HSP27含量以及空肠中3种蛋白含量均无显著变化(P>0.05);与运输2 h相比,运输6 h后3种蛋白含量都极显著降低(P<0.01)。结果显示,山羊对运输应激在细胞水平的适应性调节与血清中HSP70和HSP90蛋白水平升高有密切联系,运输2 h山羊通过上调HSP70和HSP90对应激导致的空肠损伤发挥细胞保护作用。 相似文献