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1.
取AA肉鸡,在其7日龄和14日龄时分别给予柔嫩艾美耳球虫(E.tenella)孢子化卵囊进行首免和二免,并同时肌肉注射5 000 U重组鸡γ干扰素(rCh IFN-γ)后,于21日龄以同源E.tenella攻虫。试验结果表明,rCh IFN-γ协同球虫活卵囊免疫可减少由于球虫病造成的体质量下降,降低OPG值和肠道病变记分,提高抗球虫指数(AC I);同时还发现,rCh IFN-γ能够显著增加肠道绒毛高度、肠隐窝深度、刷状缘厚度(=α0.05)。由此表明,rCh IFN-γ可以减轻由于球虫感染所造成的肠道黏膜损伤,促进肠道的吸收功能,进而减轻球虫病所造成的增重损失,对球虫活卵囊疫苗的免疫有一定的免疫增强效果。 相似文献
2.
探讨绵羊感染肺炎支原体后相关细胞因子和干扰素刺激因子15(ISG15)的变化及其意义。应用Real-time PCR方法检测了18只经人工感染肺炎支原体的巴什拜羔羊和盘羊杂交羔羊的外周血单核细胞中IFN-γ、IL-12和ISG15 mRNA的表达水平。结果:在感染后的第7天与第14天,巴什拜羊ISG15的表达量显著高于盘羊杂交羊和对照组(P<0.05);盘羊杂交羊和巴什拜羊的IFN-γ表达水平显著高于对照组(P<0.05);在感染后的第14天,盘羊杂交羊的IL-12表达水平显著高于巴什拜羊(P<0.01)。证实IFN-γ、IL-12和ISG15在肺炎支原体感染过程中起重要作用,对研究支原体肺炎发病机理及提供免疫治疗有指导意义。 相似文献
3.
本研究旨在探索肝片吸虫感染小鼠急性期肝脏单核细胞悬液中细胞因子表达模式及其原因。试验将小鼠分为4组,分别对感染抗体处置组、感染非抗体处置组、抗体处置非感染组和非抗体处置非感染组的肝脏单核细胞培养上清液中IL-4、IL-5、IL-13及IFN-γ进行测定;同时也对肝脏中IL-4及IL-12P40 mRNA水平进行荧光定量PCR检测。结果显示,IL-4和IL-5的表达模式相似。在非感染状态下,无论是否进行抗体处置,两者都处于较低表达水平。在感染状态下,两者在非抗体处置小鼠中的表达显著高于抗体处置组(P<0.05)。IL-13与IL-4及IL-5的表达差异在于感染并用抗体处置后,小鼠肝脏单核细胞中的IL-13仍有较高水平表达。IFN-γ的表达量在感染后有所增加,但在有无抗体处理间无显著差异(P>0.05)。mRNA检测结果显示,在非感染状态下,抗体处置后的IL-4 mRNA水平显著低于非抗体处置组(P<0.05)。感染后非抗体处置组小鼠中IL-4 mRNA水平极显著高于抗体处置组(P<0.01),同时也极显著高于非感染非抗体处置组(P<0.01)。IL-12P40 mRNA的水平在感染状态下,抗体处置组的IL-12P40 mRNA虽较非抗体处置组低,但无显著差异(P>0.05)。但感染后非抗体处置组的IL-12P40 mRNA水平均极显著高于感染组抗体处置和非抗体处置组(P<0.01)。本试验结果表明,IL-4Rα对肝片吸虫感染急性期IL-5和IL-4的表达极其重要,但对IL-13及IFN-γ的影响较小。 相似文献
4.
《中国畜牧兽医》2010,(10)
CpG ODN诱导不同物种先天性免疫反应的分析结果表明,诱导细胞因子(CK)分布的种类和水平存在明显的异同。试验对3类CpG ODNs(A、B、C类)如何激活猪先天性免疫生物标记及猪免疫细胞在体内外培养(含CpGODNs)中的先天性免疫反应动力学进行了研究。利用实时定量PCR(SYBR Green)分析了细胞因子和趋化因子基因的mRNA表达水平。结果发现,A-类CpG ODN可显著诱发IFN-γ、IL-12(P40)、IL-6、IL-4、TNF-αmRNA的瞬间表达;C-类CpG ODN可显著诱发IFN-γ、IFN-α、IL-12 mRNA的表达,并使IL-4(Th-2型)mRNA降至最低表达水平,GCODNs可刺激使一些细胞因子的表达水平降至最低;B-classGpC ODN7909能显著影响IL-12(P35)mRNA表达水平。值得注意的是,12 h时3类CpG ODNs刺激均可显著诱导IP-10的mRNA表达。体内外试验结果表明,IP-10可作为CpG ODNs诱发猪免疫活性的生物标记。 相似文献
5.
鸡柔嫩艾美耳球虫3-1E真核重组表达质粒的构建及其免疫保护性分析 总被引：2，自引：0，他引：2
为构建鸡柔嫩艾美耳球虫(E.tenella)重组真核表达质粒并检测其免疫保护性,本实验将E.tenella表面抗原基因3-1E(E)与鸡IFN-γ、IL-2基因分别串联在真核表达载体pcDNA3.1(+)中,构建真核重组表达质粒pcDNA-E-IFNγ、pcDNA-E-IL2,同时构建对照质粒pcDNA-E、pcDNA-IFNγ、pcDNA-IL2.经酶切鉴定得到预期大小目的片段,测序结果与预期序列一致.将构建的重组质粒免疫鸡只,经western blot检测表明该重组质粒在鸡体内可以正常表达;对感染鸡只的免疫保护效果显示,pcDNA-E-IFNγ、pcDNA-E-IL2组抗球虫指数(ACI)分别为181.04、187.30,具有高效的抗球虫效果,为将其进一步研制成为具有实用价值的抗球虫疫苗奠定了基础. 相似文献
6.
《中国兽医杂志》2015,(11)
为研究抗病毒嗜酸乳杆菌菌株的细胞机制,利用嗜酸乳杆菌胞外多糖(EPS)作用于猪睾丸细胞(ST),以MTT法检测其是否抑制猪传染性胃肠炎病毒(TGEV)感染,并观察IFN-γ、IL-6、IL-8的mRNA表达水平。本试验分为4组,分别是正常细胞对照组(Control组)、TGEV感染组(TGEV组)、EPS预处理感染TGEV组(EPS+TGEV)组和胞外多糖组(EPS组),在2、4、6、12、24 h时采集细胞样品,通过荧光定量PCR方法检测不同时间点各组细胞中IFN-γ、IL-6、IL-8mRNA的表达量。结果发现,EPS具有抑制TGEV感染ST细胞的效应;EPS组、TGEV组和EPS+TGEV组IFN-γ、IL-6、IL-8 mRNA表达量较Control组比都相对增加,三种细胞因子随着时间的延长,均呈现出先快速增加后减少回归到正常水平的趋势。EPS+TGEV组在感染2 h时IL-8 mRNA表达量达到最大值,4 h时IL-6、IFN-γmRNA表达量达到最大值,且均出现了叠加效应,相比正常细胞对照组差异极显著(P0.001)。结果表明,EPS对TGEV感染ST细胞有一定的抑制作用,提高了抗TGEV感染初期IFN-γ、IL-6、IL-8 mRNA表达水平。 相似文献
7.
不结球白菜提取物对肉鸡脾脏IL-2、IL-4及IFN-γ mRNA表达的影响 总被引：1，自引：0，他引：1
《中国家禽》2015,(20)
本研究旨在探讨不结球白菜提取物(NCCE)对肉鸡脾脏细胞因子mRNA表达水平的影响。选取1日龄健康AA肉鸡180只,随机分为6个处理,每个处理3个重复,每个重复10只鸡。对照组饲喂玉米-豆粕型基础日粮,处理组分别在基础日粮中添加100、300、500、700、900 mg/kg NCCE,试验期为42 d。采用实时荧光定量PCR检测NCCE对肉鸡脾脏组织中白细胞介素-2(IL-2)、白细胞介素-4(IL-4)及γ-干扰素(IFN-γ)mRNA的相对表达量。结果表明,与对照组相比,300、500、700、900 mg/kg处理组显著提高了鸡脾脏IL-2、IL-4 mRNA表达水平(P0.05);500、700、900 mg/kg处理组显著提高了IFN-γmRNA表达水平(P0.05);与700 mg/kg处理组相比,500 mg/kg处理组IL-2、IL-4及IFN-γmRNA表达量具有增加的趋势(P0.05)。NCCE能够诱导肉鸡脾脏IL-2、IL-4及IFN-γmRNA的表达,基础日粮中添加500 mg/kg效果最好。 相似文献
8.
为评价两种球虫疫苗对京海黄鸡杂交配套系亲本良凤鸡(BB鸡)和岭南黄鸡(FF鸡)的免疫效果,本研究对9日龄实验鸡接种两种疫苗[500个孢子化卵囊(V1组)、正典球虫苗(V2组)],24 d后攻柔嫩艾美耳球虫(E.tenella)2.5万个/只,攻虫后8 d检测各项评价指标。结果显示:攻虫后临床表现、盲肠病变、相对增重率及抗球虫指数(ACI),BB鸡优于FF鸡,V1组优于V2组;两鸡群血浆中过氧化氢酶(CAT)、超氧化物歧化酶(SOD)的含量V1组均显著高于V2组(p0.05);BB鸡γ干扰素(IFN-γ)含量V1组显著高于V2组(p0.05);FF鸡血浆中β胡萝卜素(β-C)含量V1组显著高于V2组(p0.05)。综合分析表明,BB鸡E.tenella抗性优于FF鸡,500个E.tenella活卵囊免疫效果优于正典球虫疫苗。 相似文献
9.
PRRSV和PCV2共感染对猪肺泡巨噬细胞细胞因子IL-10、IL-12p40和IFN-γ mRNA转录的影响 总被引：2，自引：1，他引：2
用猪繁殖与呼吸综合征病毒(PRRSV)和猪圆环病毒2型(PCV2)共感染40日龄健康仔猪,利用实时荧光定量PCR技术对共感染仔猪肺泡巨噬细胞(PAM)细胞因子IL-10、IL-12p40和IFN-γ的mRNA转录水平的变化进行了定量分析。结果表明,IL-12p40 mRNA转录从攻毒后3 d开始显著上调(P<0.05),7 d达高峰,14 d开始下降,但仍显著高于对照组(P<0.05),28 d和42 d低于对照组;IL-10 mRNA在3 d显著上调(P<0.05),14 d达到转录高峰(P<0.01),之后逐渐下降,42 d接近对照组水平;IFN-γmRNA转录水平尽管在3 d和28 d时出现2次转录低峰1、4 d和42 d时出现2次高峰,但只在3 d和7 d差异显著(P<0.05)。由此表明,PRRSV和PCV2共感染可导致PAM细胞因子IL-12p40和IL-10 mRNA的转录在感染早期被激活,而IFN-γ mRNA转录则呈较复杂的动态变化,提示PRRSV和PCV2共感染猪PAM的免疫应答、免疫调节和抗感染功能均受到不同程度的影响。 相似文献
10.
《中国兽医学报》2020,(2):379-385
为了探究菊苣酸(chioric acid,CA)对脂多糖(lipopolysaccharide,LPS)诱导的牦牛外周血单个核细胞(peripheral blood mononuclear cell,PBMC)炎性相关因子分泌及转录水平的调节作用,用Ficoll法分离牦牛PBMC,体外将PBMC与LPS和CA共同培养,通过CCK-8法筛选LPS最佳刺激浓度,ELISA试剂盒检测CA对炎性相关因子含量的影响,实时荧光定量PCR法检测炎性相关因子mRNA表达情况。结果表明,CCK-8法筛选的LPS最佳致炎质量浓度为1.0 mg/L。与对照组相比,CA处理组显著提高IL-10的含量(P<0.05),LPS处理组显著提高IL-6和IL-1β的含量(P<0.05),极显著提高了IL-8、TNF-a和INF-γ的含量(P<0.01);与LPS处理组相比,CA+LPS处理组IL-6、IL-8、IL-1β、TNF-a和INF-γ的含量均显著降低(P<0.05),但IL-10的含量显著升高(P<0.05)。同时,与对照组相比,CA处理组显著降低IL-1βmRNA表达(P<0.05),显著升高IL-10 mRNA表达(P<0.05),LPS处理组极显著升高IL-6、IL-8、IL-1β、INF-γ和TNF-αmRNA表达(P<0.01);与LPS组相比,CA+LPS处理组IL-6、INF-γ和TNF-αmRNA表达显著降低(P<0.05),IL-8和IL-1βmRNA表达极显著降低(P<0.01),IL-10 mRNA表达显著升高(P<0.05)。上述结果说明,CA可通过调节牦牛PBMC炎性因子的分泌及表达,从而发挥抗炎作用。 相似文献
11.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1984,25(9):347-350
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario.
Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously.
相似文献12.
Heartworm in dogs in Canada in 1982 总被引：8，自引：8，他引：0
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1983,24(7):227-229
13.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(9):324-328
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).
Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.
相似文献14.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(6):504-508
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
15.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(10):323-327
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal.
Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection.
相似文献16.
17.
Slocombe JO Villeneuve A 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(10):630-633
In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
18.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated.
Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively.
相似文献19.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(8):641-646
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
20.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):491-495
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%).
Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada.
相似文献