共查询到19条相似文献,搜索用时 46 毫秒
1.
鱼类细胞因子研究进展 总被引:1,自引:0,他引:1
鱼类免疫系统中存在许多细胞因子,它们行使非特异性和特异性免疫防御,在维持机体内环境的稳定方面发挥重要作用。细胞因子的研究在医学和兽医学领域已取得巨大的发展,但鱼类的细胞因子研究相对滞后。目前在鱼类中已发现多种细胞因子,并且利用分子生物学技术,已经克隆到部分细胞因子的基因。本文对鱼类的细胞因子研究进行综述,以促进水产养殖业的高效生产。 相似文献
2.
3.
4.
5.
6.
日粮营养与仔猪免疫功能的完善 总被引:4,自引:0,他引:4
仔猪出生后 3周以内有 1 5~ 30 %的死亡 ,其中大约一半死于最初一周以内 (Fahmy和Bernard ,1 971 ;Hendrix等 ,1 978) ,初生仔猪免疫能力低是主要原因(Gaskins和Kelley ,1 995)。仔猪的免疫能力低与某些方面的发育特点有关 ,胎儿发育时母体的抗体 (免疫球蛋白 ,Ig)不能进入胎儿体内 ,因此初生的仔猪没有获得性免疫保护 ;另外 ,初生仔猪免疫系统在解剖上和功能上的不成熟性 ,使仔猪的成活必须依靠母猪初乳和常乳中的抗体所获得的被动免疫。因此 ,仔猪在母乳抗体水平下降 ,而本身的主动免疫机制发育成熟以… 相似文献
7.
8.
9.
10.
白藜芦醇具有广泛的药理学功能,能通过提高机体的特异性和非特异性免疫,促进免疫细胞增殖和细胞因子产生,增强吞噬细胞功能,从而提高机体免疫力。就白藜芦醇对动物免疫机能的影响作一阐述。 相似文献
11.
M Zeeman 《Veterinary immunology and immunopathology》1986,12(1-4):235-241
This is a brief overview of the field of immune modulation in fish. Special attention is given to the effects of biological rhythms on the immune responses of animals. Biological rhythms in fish appear to be poorly studied and the effects of such rhythms on fish immune responses needs to be evaluated. Implications for research on the modulation of fish immune responses are discussed. 相似文献
12.
13.
14.
15.
犬体感染犬细小病毒后能很快产生免疫,临床症状一出现即可检出CPV抗体,而在临床发病期间迅速达到高峰.CPV的免疫主要有三种方式:天然免疫、主动免疫和被动免疫. 相似文献
16.
Modulation of the fish immune system by hormones 总被引:19,自引:0,他引:19
Immune-neuroendocrine interactions in fish, as in mammals, have become a focus of considerable interest, with the modulation of immune responses by hormones receiving particular attention. Cortisol, growth hormone (GH), prolactin (PRL), reproductive hormones, melanin-concentrating hormone (MCH) and proopiomelanocortin (POMC)-derived peptides have all been shown to influence immune functions in a number of fish species. This review summarises the known effects of these hormones on the fish immune system, as well as the often complex interactions between different hormones. The possible implications for fish health, with respect to aquaculture and the changes in immunocompetence that take place during different stages in the fish life cycle are also discussed. 相似文献
17.
A study was conducted to determine the effects of supplemental fish oil on growth performance and immune system characteristics of beef calves. The grazing phase (78 d) used 48 yearling crossbred steers (231 +/- 22 kg initial BW) grazing 0.45-ha mixed-grass pastures (four per treatment) supplemented with 1.82 kg/d (as-fed basis) of the diets. Diets consisted of 1) corn-based supplement; 2) corn-based supplement with 1.5% (as-fed basis) fish oil; 3) wheat midd-based supplement; and 4) wheat midd-based supplement with 1.5% fish oil. On d 78, all calves were bled by jugular venipuncture, and blastogenic response of peripheral blood lymphocytes to phytohemagglutinin, concanavalin A, and pokeweed mitogen was measured. Fish oil supplementation negatively affected ADG with the corn-based supplement, but it had no effect when added to the wheat midd-based supplement (base-supplement x fish oil interaction; P < 0.03). Isolated lymphocytes from calves fed the corn-based supplement with fish oil had a greater response to stimulation with concanavalin A than did lymphocytes from calves fed the corn-based supplement alone, but there was no effect of fish oil addition to the wheat midd-based supplement (base-supplement x fish oil interaction; P < 0.01). During the growing phase, the 48 steers (352 +/- 32 kg initial BW) from the grazing phase were moved to drylot pens and were stratified by BW and previous dietary treatment (three calves per pen; eight pens per dietary treatment) for a 56-d growing trial. Dietary treatments consisted of 1) control, and 2) the control diet with 3% (as-fed basis) fish oil. Calves supplemented with fish oil had decreased ADG, ADFI, and G:F (P < or = 0.02) compared with controls. Fish oil supplementation during the grazing phase modulated the immune system; however, the decreased growth performance associated with fish oil in both trials may limit its practical use as an immune stimulant. 相似文献
18.
19.
对探讨MD疫苗免疫后器官组织的免疫学变化,采用MD三价疫苗和HVT疫苗免疫1日龄雏鸡后,观察中枢和外围免疫器官以及消化道,呼吸道相关局部免疫组织的免疫学变化。结果MD两种疫苗免疫后,胸腺,法氏囊,脾脏和盲肠扁桃体,肺支气管粘膜焉淋巴组织及哈尔腺中TAMAE+细胞,TACP+细胞,浆细胞和淋巴细胞明显增多,表明MD疫苗免疫应签明显增强,其中MD三价苗较HVT疫苗更明显。 相似文献