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牦牛是高原地区牧民收入的主要经济来源之一，如何提高牦牛的繁殖力一直备受关注。β-防御素是一类具有广谱抗菌活性的肽，研究牦牛β-防御素（Bos mutus β-defensins,bBD）家族在附睾的表达具有重要意义。本实验使用实时荧光定量PCR技术分析牦牛附睾不同区段β-防御素基因的表达情况。结果显示，共有9个β-防御素基因在附睾头、体和尾的表达存在极显著差异。bBD109、bBD119、bBD121、bBD123、bBD128、SPAG11基因集中于附睾头部表达；bBD125与bBD136集中于附睾体部表达；bBD15同时在附睾头部和体部高表达。结合生物信息学分析发现，这9种β-防御素均存在保守的氨基酸序列、反向折叠的β-转角；bBD136脂溶性最高、疏水性强，bBD125和SPAG11相反；β-防御素基因编码蛋白均为不稳定蛋白（bBD123除外），并且预测分析都存在SP型信号肽（除bBD125外）；β-防御素家族基因在附睾不同区段的差异性表达情况以及编码蛋白质的各种理化性质与结构组成等特征都表明其可能在精子成熟过程中发挥着重要作用。 相似文献
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从雌性骆驼输卵管、子宫、子宫颈、阴道组织中提取总RNA，根据已发表的骆驼β-防御素-1基因的cDNA序列设计合成引物，采用RT—PCR扩增出了骆驼β-防御素-1基因；将扩增产物克隆于pBlueselect T载体后进行了序列分析。以伊肌动蛋白（pactin）基因作为内参，对扩增的β-防御素-1基因进行琼脂糖凝胶电泳后，应用凝胶成像分析系统，推断出了不同组织中β-防御素-1基因的表达量。结果，从雌性骆驼生殖各组织上皮均获得了203bp的β-防御素-1基因的扩增片段，且β-防御素-1基因在雌性骆驼生殖道各组织内的表达量不同。结果表明，β-防御素-1在雌性骆驼生殖组织的先天免疫中起重要作用。 相似文献
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本试验旨在研究不同水平维生素D3对丝毛乌骨鸡组织中β-防御素(AVBDs)基因表达的调控.采用实时荧光定量PCR方法检测饲喂不同水平(800、1 600、3 200和6 400 IU/kg)维生素D3对丝毛乌骨鸡胸腺、十二指肠、空肠、回肠、盲肠和法氏囊中3个β-防御素(AVBD-1、AVBD-5和GAL-1)基因表达水平的影响.结果表明:3个β-防御素基因在6个组织中均有表达,其中乌骨鸡AVBD-1和GAL-1基因的最高表达水平都在采食了3 200 IU/kg维生素D3时的空肠;AVBD-5基因的最高表达水平在采食了1 600 IU/kg维生素D3时的十二指肠;在依次采食维生素D3800、1 600、3 200和6 400 IU/kg的乌骨鸡组织中,3个β-防御素基因都存在先升后降的表达趋势.结果表明,β-防御素基因在同一组织的表达水平与维生素D3饲喂水平存在剂量关系,适宜的维生素D3饲喂水平能上调这3个β-防御素基因在乌骨鸡组织中的表达量. 相似文献
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为了利用SYBR Green Ⅰ实时荧光定量PCR技术对蒙古绵羊雌性生殖道β-防御素基因表达水平进行相对定量测定,建立蒙古绵羊β-防御素基因相对表达水平的实时荧光定量PCR方法,试验根据GenBank中羊β-防御素基因序列设计合成引物,进行实时荧光定量PCR,同时以β-Actin为内参基因对β-防御素基因进行均一化处理,利用荧光阈值(Ct值)计算β-防御素基因的相对表达量.结果表明:扩增产物为β-防御素;利用SYBR Green Ⅰ实时荧光定量PCR技术可以测定蒙古绵羊β-防御素基因表达水平相对含量. 相似文献
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选取滩羊β-防御素分布较多的气管、食道和口腔等部位的黏膜组织,提取组织总RNA,RT-PCR获得滩羊β-防御素基因全序列.构建逆转录病毒表达载体,实现滩羊β-防御素基因的表达.经测序后得到滩羊β-防御素编码区的核苷酸序列(64个氨基酸).成功构建了带有滩羊β-防御素基因的逆转录病毒载体pLEGFP-SBD,在蓝光激发光下能观察到绿色荧光蛋白,并用SDS-PAGE方法检测到分子量约为8 kD的目的蛋白.该蛋白具有抗细菌和抑制VSV病毒增殖的活性. 相似文献
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《畜牧兽医学报》2015,(7)
为探明山羊睾丸和附睾头β防御素家族基因表达特点及其蛋白的特性。利用3只7日龄羔羊睾丸和3只成年种公羊睾丸和附睾头的Illumina HiSeqTM2000高通量转录组测序数据,筛选出β防御素家族基因并进行差异表达基因比较分析,利用生物信息学对β防御素家族蛋白特性进行预测。结果显示:在山羊7日龄睾丸、成年睾丸和附睾头中分别表达7、12和33种β防御素,其表达量最高的分别是gDB123、gDB119和gDB124,成年睾丸中特异性表达是gDB33,附睾头中特异表达有21种β防御素。山羊β防御素分子量在6.89~13.85ku,为小分子、极性、带正电荷、疏水性的强碱性多肽。山羊β防御素也是含高度保守6个半胱氨酸的空间构象,基本结构-C-X2-45-CX3-6-C-X3-13-C-X4-7-CC-,其中24种β防御素结构为-C-X5,6-C-X3,4-C-X9-C-X5,6-CC-。有16种β防御素是分泌型糖蛋白,除gDB126无磷酸化位点外,其余的β防御素蛋白均有磷酸化位点。山羊附睾头特异性高度表达有丰富β防御素,它们是一类抗微生物的阳离子肽,在精子成熟过程中形成精子膜上糖被,或精子运动获得的过程中发挥重要作用;也可作为信号分子,某些信号通路中发挥作用。 相似文献
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Johns I Stephen JO Del Piero F Richardson DW Wilkins PA 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2005,19(4):564-570
Hemangiosarcoma is a rare neoplasm of horses and hemangiosarcoma in young horses might behave differently than in mature horses. The purpose of this study was to identify the characteristics of hemangiosarcoma occurring in horses < or = 3 years of age. Medical records from 1982 to 2004 were searched for horses < or = 3 years of age with a histopathologic diagnosis of hemangiosarcoma. Eleven records were identified. Thoroughbred and Thoroughbred crosses predominated. Age ranged from 9 days to 3 years. All horses presented with cutaneous or leg swellings or joint effusion. Physical examination findings included tachycardia, fever, and depression. Laboratory abnormalities included anemia (5/11), hyperfibrinogenemia (4/11), hypofibrinogenemia (3/11), thrombocytopenia (2/11), and neutrophilic leukocytosis (1/11). Ultrasonographic and radiographic evaluation was not diagnostic in any case. Antemortem histopathologic diagnosis was obtained in 10 cases. Six of 11 horses were euthanized. Surgical resection was performed in 5 horses, 2 of which were later euthanized. Diagnosis was confirmed histologically at postmortem examination in all euthanized horses. Two cases resolved spontaneously. Early histopathologic diagnosis may allow cure if the mass is localized and amenable to surgical resection. In cases where the horse is medically stable, and masses are not interfering with quality of life, a period of observation may be warranted. 相似文献
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DonL. Barber 《Veterinary radiology & ultrasound》1981,22(4):149-158
In this paper an overview of principles involved in radiographic imaging by tomography, magnification radiography, xeroradiography, and computed tomography is presented. Tomography is a method to selectively blur distracting superimposed shadows while maintaining relative image sharpness in a plane of concern. Magnification radiography is a method to directly enlarge the radiographic image by increasing object-film distance and utilizing a small focal spot. Xeroradiography is an electrostatic imaging process that provides wide latitude and good resolution through enhanced contrast in tissues with poor inherent contrast. Computed tomography involves imaging by computer analysis of x-ray absorption utilizing rotational x-ray projections. 相似文献
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Liptak JM Dernell WS Rizzo SA Withrow SJ 《Journal of the American Animal Hospital Association》2005,41(1):47-55
Eleven dogs with malignant tumors of the digits and feet were treated with partial foot amputation. Partial foot amputation involved amputation of one or both central weight-bearing digits. Lameness occurred in all dogs but resolved in eight dogs at a median of 37 days postoperatively. In the remaining three dogs, lameness improved but did not resolve. Tumor control was excellent, with no evidence of local recurrence in 10 dogs. One dog underwent limb amputation. Based on these results, partial foot amputation may be recommended in the management of malignant tumors of the canine foot in which more than one digit must be amputated to achieve adequate surgical margins. 相似文献