Article(id=1307013466301162262, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013423896753139, articleNumber=null, orderNo=null, doi=10.11843/j.issn.0366-6964.2026.03.043, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1744560000000, receivedDateStr=2025-04-14, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1789545893502, onlineDateStr=2026-09-16, pubDate=1774195200000, pubDateStr=2026-03-23, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789545893502, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789545893502, creator=13701087609, updateTime=1789545893502, updator=13701087609, issue=Issue{id=1307013423896753139, tenantId=1146029695717560320, journalId=1306274286668972124, year='2026', volume='57', issue='3', pageStart='1177', pageEnd='1776', issueExtLink='null', onlineDate='null', pubDate='1774195200000', pubDateStr='2026-03-23', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1789545883392, creator='13701087609', updateTime=1789609930841, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1307282058464743901, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013423896753139, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1307282058464743902, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013423896753139, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1683, endPage=1696, ext={EN=ArticleExt(id=1307013466519266071, articleId=1307013466301162262, tenantId=1146029695717560320, journalId=1306274286668972124, language=EN, title=The Effect of Peptide gCK-16 on the Immune Efficacy of Attenuated Vaccine of Infectious Bursal Disease in Chickens, columnId=1307007406035198078, journalTitle=Acta Veterinaria et Zootechnica Sinica, columnName=BASIC VETERINARY MEDICINE, runingTitle=null, highlight=null, articleAbstract=

This experiment aims to study the immune-enhancing effects of peptide gCK-16 combined with the attenuated vaccine of infectious bursal disease (IBD) and to evaluate the protective effects of the vaccination on SPF chickens(14-day-old). To investigate the toxicity of the peptide gCK-16, the immune effect of vaccine and the levels of cytokines (IFN-γ, IL-4 and IL-6) in serum, the cells were stimulated by the different concentrations of peptide gCK-16 in vitro, and then the chickens were immunized with the different concentrations of peptide gCK-6 in combination with attenuated vaccine of IBD. Meanwhile, the challenge protection of infectious bursal disease virus (IBDV) was performed by detecting the survival rate, the bursa-weight/body-weight index (BBIX), the splenic lymphocyte viability, the level of immunoglobulin (IgM and IgA), the level of immunoglobulin (IgY) in the serum, the histopathological changes and the expression level of apoptosis-related proteins in the bursa. The results show that peptide gCK-16 has no obvious toxicity both in vivo and in vitro, and peptide gCK-16 combined with the attenuated vaccine of IBD can significantly increase the antibody titer of IBDV in the serum of chickens immunized with the attenuated vaccine of IBD and the level of cytokines (IFN-γ, IL-4 and IL-6) in the serum. Moreover, the peptide gCK-16 significantly promoted the stimulation index of LPS, ConA and IBDV to PBMCs. Immunization and challenge experiments also showed that the peptide gCK-16 significantly increased the survival rate and BBIX of chickens infected with IBDV, and reduced the pathological changes of bursa tissues, while the expression levels of pro-apoptotic proteins Bax, Caspase-3, Caspase-9 were significantly decreased, and the expression level of anti-apoptotic protein Bcl-2 was significantly increased. In conclusion, peptide gCK-16 can significantly enhance the humoral and cellular immune responses of the attenuated vaccine of IBD, and achieved an effective immune protection in chickens infected with IBDV, which provides theoretical reference and data support for the application of this peptide as an immunopotentiator of the attenuated vaccine of IBD.

, authors=Qiuyu ZHANG1, 2, 3, Feng YUE4, Kang FENG2, Ruiyan NIU2, Peng LI4, Yanping ZHU4, Yangzhao ZHU4, zilong SUN2, Xuannian WANG1, 3, authorsList=Qiuyu ZHANG, Feng YUE, Kang FENG, Ruiyan NIU, Peng LI, Yanping ZHU, Yangzhao ZHU, zilong SUN, Xuannian WANG, authorCompany=null, correspAuthors=zilong SUN, Xuannian WANG, authorNote=null, correspAuthorsNote=
WANG Xuannian, E-mail:
SUN Zilong, E-mail:
, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1307013470847787818, articleId=1307013466301162262, tenantId=1146029695717560320, journalId=1306274286668972124, language=CN, title=多肽gCK-16对鸡传染性法氏囊病弱毒疫苗免疫效果的影响, columnId=1307007406223941760, journalTitle=畜牧兽医学报, columnName=基础兽医, runingTitle=null, highlight=null, articleAbstract=

本试验旨在研究多肽gCK-16联合鸡传染性法氏囊病(infectious bursal diease,IBD)弱毒疫苗的免疫增强效果,并在鸡上进行攻毒保护试验的评价。通过将不同浓度的多肽gCK-16体外刺激细胞以及联合IBD弱毒疫苗免疫14日龄SPF鸡后,检测多肽的毒性、疫苗免疫效果以及血清中细胞因子(IFN-γ、IL-4和IL-6)水平。同时,进行传染性法氏囊病病毒(IBDV)攻毒保护试验,检测存活率、囊重指数、脾淋巴细胞活性、法氏囊中免疫球蛋白(IgM和IgA)水平、血清中免疫球蛋白(IgY)水平、组织病理学变化以及凋亡相关蛋白表达水平。结果表明,多肽gCK-16在体内和体外没有明显的毒性,多肽gCK-16联合IBDV弱毒疫苗可以显著增加IBDV弱毒疫苗免疫鸡后血清中IBDV抗体水平和血清中细胞因子(IFN-γ、IL-4和IL-6)的表达水平。另外,多肽gCK-16能显著促进LPS、ConA和IBDV对PBMCs的刺激指数。IBDV攻毒试验也表明,多肽gCK-16能明显提高IBDV感染鸡后的存活率和囊重比,降低法氏囊组织病理学变化,而促凋亡蛋白Bax、Caspase-3和Caspase-9表达水平显著降低,抗凋亡相关蛋白Bcl-2表达水平显著升高。本研究发现多肽gCK-16能显著增强IBDV弱毒疫苗的体液免疫和细胞免疫应答,对感染IBDV的鸡可以起到有效的免疫保护效果,为该多肽作为IBDV弱毒疫苗免疫增强剂的应用提供了理论参考和数据支撑。

, authors=张秋雨1, 2, 3, 岳锋4, 冯康2, 牛瑞燕2, 李鹏4, 朱艳平4, 祝仰钊4, 孙子龙2, 王选年1, 3, authorsList=张秋雨, 岳锋, 冯康, 牛瑞燕, 李鹏, 朱艳平, 祝仰钊, 孙子龙, 王选年, authorCompany=null, correspAuthors=孙子龙, 王选年, authorNote=

张秋雨,主要从事禽疫苗免疫增强剂及其应用研究,E-mail:

, correspAuthorsNote=
王选年,主要从事动物病理学和免疫学研究,E-mail:
孙子龙,主要从事环境刺激与机体应激研究,E-mail:
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DOI:10.1186/s13578-021-00728-9, articleTitle=null, refAbstract=null), Reference(id=1307281756554555477, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[49], rfOrder=58, authorNames=null, journalName=null, refType=null, unstructuredReference=HUANG XW,LIU W,ZHANG JY,et al.Very virulent infectious bursal disease virus-induced immune injury is involved in inflammation,apoptosis,and inflammatory cytokines imbalance in the bursa of Fabricius[J].Dev Comp Immunol,2021,114:103839. 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A. Temperature changes after injection with different doses of peptide gCK-16; B. The levels of AST; C. The levels of ALT levels; D. The toxicity of peptide gCK-16 to PBMCs; E. The toxicity of peptide gCK-16 to DF-1 and HD-11

, figureFileSmall=bfpbwWkY+bCcD3CUOGH5Xg==, figureFileBig=Jd7/fv2OJEt2TXAPNa0sCw==, tableContent=null), ArticleFig(id=1307281744747589641, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=CN, label=图1, caption=多肽gCK-16对体内温度变化和体外细胞毒性的影响

A.不同剂量的多肽gCK-16对鸡体温变化;B. AST水平;C. ALT水平; D. MTT方法检测多肽gCK-16对PBMCs细胞毒性;E.多肽gCK-16对DF-1和HD-11的毒性

, figureFileSmall=bfpbwWkY+bCcD3CUOGH5Xg==, figureFileBig=Jd7/fv2OJEt2TXAPNa0sCw==, tableContent=null), ArticleFig(id=1307281744844058634, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=EN, label=Fig.2, caption=Peptide gCK-16 enhanced the level of specific antibody in serum of chicken immunized by the attenuated vaccine of IBD, figureFileSmall=Mso/m4C6sJMy7JwXzwSVbg==, figureFileBig=0jtLnJ5XfRQ9nde943Zsrg==, tableContent=null), ArticleFig(id=1307281744923750411, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=CN, label=图2, caption=多肽gCK-16增强IBD弱毒疫苗诱导鸡的血清特异性抗体水平

**. P<0.01

, figureFileSmall=Mso/m4C6sJMy7JwXzwSVbg==, figureFileBig=0jtLnJ5XfRQ9nde943Zsrg==, tableContent=null), ArticleFig(id=1307281744986664972, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=EN, label=Fig.3, caption=Peptide gCK-16 enhanced the level of cytokines in serum of chicken immunized by the attenuated vaccine of IBD

B. The levels of IFN-γ; B. The levels of IL-4; C. The levels of IL-6. *. P<0.05, **. P<0.01

, figureFileSmall=waKZpo4yNgjAmaJR/DJesQ==, figureFileBig=Ywt7WIy0poV5LRGSL96VSw==, tableContent=null), ArticleFig(id=1307281745057968141, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=CN, label=图3, caption=多肽gCK-16增强IBD弱毒疫苗诱导鸡的血清中细胞因子水平

A. IFN-γ水平; B. IL-4水平; C. IL-6水平。*. P<0.05, **. P<0.01

, figureFileSmall=waKZpo4yNgjAmaJR/DJesQ==, figureFileBig=Ywt7WIy0poV5LRGSL96VSw==, tableContent=null), ArticleFig(id=1307281745171214350, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=EN, label=Fig.4, caption=Peptide gCK-16 enhanced the proliferation of PBMCs in chicken immunized by the attenuated vaccine of IBD

A. 21 days post-immunization; B. 35 days post-immunization. *. P<0.05

, figureFileSmall=Aln/aWgVg1SsGkw+geFwPA==, figureFileBig=9PK16jflHoCRGjredkgxVQ==, tableContent=null), ArticleFig(id=1307281745242517519, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=CN, label=图4, caption=多肽gCK-16增强IBD弱毒疫苗诱导鸡的PBMCs增殖效应

A.免疫后21 d;B.免疫后35 d。*.P<0.05

, figureFileSmall=Aln/aWgVg1SsGkw+geFwPA==, figureFileBig=9PK16jflHoCRGjredkgxVQ==, tableContent=null), ArticleFig(id=1307281745318014992, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=EN, label=Fig.5, caption=The effects of peptide gCK-16 on the survival rate and BBIX in IBDV-infected chickens

A. Survival rate; B. BBIX (*. P<0.05, **. P<0.01)

, figureFileSmall=hZrkix7Kv382TfWLcIeZjw==, figureFileBig=ukE57vnBEcMaAXWdEEYaqg==, tableContent=null), ArticleFig(id=1307281745372540945, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=CN, label=图5, caption=多肽gCK-16对IBDV感染后鸡存活率和法氏囊指数的影响

A.存活率;B.囊重比(*. P<0.05, **. P<0.01)

, figureFileSmall=hZrkix7Kv382TfWLcIeZjw==, figureFileBig=ukE57vnBEcMaAXWdEEYaqg==, tableContent=null), ArticleFig(id=1307281745439649810, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=EN, label=Fig.6, caption=Peptide gCK-16 enhanced the vitality of splenic lymphocytes and the level of immunoglobulins in IBDV-infected chickens

A. Splenic lymphocyte viability; B. The levels of IgM in the BF; C. The levels of IgA in the BF; D. The levels of IgY in the serum. Compared with the Mock group, # indicates a significant difference (#. P<0.05), ## indicates an extremely significant difference (##. P<0.01); Compared with the Vaccine+gCK-16+IBDV group, * indicates a significant difference (*. P<0.05), ** indicates an extremely significant difference (**. P<0.01)

, figureFileSmall=3Pl4HbvIpCjpbHqsZy/mAw==, figureFileBig=ytnziVQ42OsKK4gljsceKA==, tableContent=null), ArticleFig(id=1307281745498370067, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=CN, label=图6, caption=多肽gCK-16增强IBDV感染后鸡脾淋巴细胞活力和免疫球蛋白水平

A.脾淋巴细胞活力;B.法氏囊中IgM水平。C.法氏囊中IgA水平;D.血清中IgY水平。与Mock组相比,#表示差异显著(#.P<0.05),而##表示差异极显著(##. P<0.01);与Vaccine+gCK-16+IBDV组相比,*表示差异显著(*. P<0.05),而**表示差异极显著(**. P<0.01)

, figureFileSmall=3Pl4HbvIpCjpbHqsZy/mAw==, figureFileBig=ytnziVQ42OsKK4gljsceKA==, tableContent=null), ArticleFig(id=1307281745594839060, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=EN, label=Fig.7, caption=Peptide gCK-16 decreased the histopathological change of BF in IBDV-infected chickens (HE, 100×)

Follicular atrophy (Black arrow); Cortical thinning (Red arrow); Cortical with obvious exfoliation (Orange arrow); Lymphocyte necrosis and reduction in the medulla (Blue arrow); Fibrous tissue hyperplasia between follicles (Green arrow); Porous (Pink arrow); Indistinct boundary between the cortex and medulla (Yellow arrow)

, figureFileSmall=73uhVgu6hLT5JkVsfXtaDg==, figureFileBig=haiy8pKUbz5KgOa/HRD/Og==, tableContent=null), ArticleFig(id=1307281745661947925, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=CN, label=图7, caption=多肽gCK-16降低 IBDV感染鸡后法氏囊组织病理变化(HE, 100×)

滤泡萎缩(黑色箭头);皮质变薄(红色箭头);皮质有明显的脱落(橘色箭头);髓质内淋巴细胞坏死、减少(蓝色箭头);滤泡间纤维组织增生(绿色箭头);空泡状(粉色箭头);皮髓质分界不清楚(黄色箭头)

, figureFileSmall=73uhVgu6hLT5JkVsfXtaDg==, figureFileBig=haiy8pKUbz5KgOa/HRD/Og==, tableContent=null), ArticleFig(id=1307281745745834006, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=EN, label=Fig.8, caption=The effects of peptide gCK-16 on the apoptosis-related proteins of BF tissues in IBDV-infected chickens

A. 0 d post-IBDV infection; B. 1 d post-IBDV infection; C. 3 d post-IBDV infection; D. 5 d post-IBDV infection; E. 7 d post-IBDV infection; F. 10 d post-IBDV infection. *. P<0.05, **. P<0.01

, figureFileSmall=6vi4Q51DK91TehWEiv2o9Q==, figureFileBig=NYwfublwycv96FpHVI0Z6Q==, tableContent=null), ArticleFig(id=1307281745825525783, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013466301162262, language=CN, label=图8, caption=多肽gCK-16对IBDV感染后法氏囊凋亡相关蛋白的影响

A. IBDV感染0 d;B. IBDV感染1 d;C. IBDV感染3 d;D. IBDV感染5 d;E. IBDV感染7 d;F. IBDV感染10 d。 *. P<0.05, **. P<0.01

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多肽gCK-16对鸡传染性法氏囊病弱毒疫苗免疫效果的影响
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张秋雨 1, 2, 3 , 岳锋 4 , 冯康 2 , 牛瑞燕 2 , 李鹏 4 , 朱艳平 4 , 祝仰钊 4 , 孙子龙 2 , 王选年 1, 3
畜牧兽医学报 | 基础兽医 2026,57(3): 1683-1696
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畜牧兽医学报 |基础兽医 2026 , 57 (3) : 1683 -1696
多肽gCK-16对鸡传染性法氏囊病弱毒疫苗免疫效果的影响
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张秋雨1, 2, 3 , 岳锋4, 冯康2, 牛瑞燕2, 李鹏4, 朱艳平4, 祝仰钊4, 孙子龙2 , 王选年1, 3
作者信息
  • 1.河南农业大学动物医学学院 国家动物免疫学国际联合中心,郑州 450046
  • 2.山西农业大学动物医学学院,晋中 030801
  • 3.龙湖现代免疫实验室,郑州 450046
  • 4.新乡学院生物工程学院,新乡 453003
通讯作者:
王选年,主要从事动物病理学和免疫学研究,E-mail:
孙子龙,主要从事环境刺激与机体应激研究,E-mail:
作者简介:

张秋雨,主要从事禽疫苗免疫增强剂及其应用研究,E-mail:

The Effect of Peptide gCK-16 on the Immune Efficacy of Attenuated Vaccine of Infectious Bursal Disease in Chickens
Qiuyu ZHANG1, 2, 3 , Feng YUE4, Kang FENG2, Ruiyan NIU2, Peng LI4, Yanping ZHU4, Yangzhao ZHU4, zilong SUN2 , Xuannian WANG1, 3
Affiliations
  • 1.International Joint Research Center of National Animal Immunology,College of Veterinary Medicine,Henan Agricultural University,Zhengzhou 450046,China
  • 2.College of Veterinary Medicine,Shanxi Agricultural University,Jinzhong 030801,China
  • 3.Longhu Laboratory,Zhengzhou 450046,China
  • 4.College of Biological Engineering,Xinxiang University,Xinxiang 453003,China
  • Corresponding Author:
    WANG Xuannian, E-mail:
    SUN Zilong, E-mail:
出版时间: 2026-03-23 doi: 10.11843/j.issn.0366-6964.2026.03.043
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本试验旨在研究多肽gCK-16联合鸡传染性法氏囊病(infectious bursal diease,IBD)弱毒疫苗的免疫增强效果,并在鸡上进行攻毒保护试验的评价。通过将不同浓度的多肽gCK-16体外刺激细胞以及联合IBD弱毒疫苗免疫14日龄SPF鸡后,检测多肽的毒性、疫苗免疫效果以及血清中细胞因子(IFN-γ、IL-4和IL-6)水平。同时,进行传染性法氏囊病病毒(IBDV)攻毒保护试验,检测存活率、囊重指数、脾淋巴细胞活性、法氏囊中免疫球蛋白(IgM和IgA)水平、血清中免疫球蛋白(IgY)水平、组织病理学变化以及凋亡相关蛋白表达水平。结果表明,多肽gCK-16在体内和体外没有明显的毒性,多肽gCK-16联合IBDV弱毒疫苗可以显著增加IBDV弱毒疫苗免疫鸡后血清中IBDV抗体水平和血清中细胞因子(IFN-γ、IL-4和IL-6)的表达水平。另外,多肽gCK-16能显著促进LPS、ConA和IBDV对PBMCs的刺激指数。IBDV攻毒试验也表明,多肽gCK-16能明显提高IBDV感染鸡后的存活率和囊重比,降低法氏囊组织病理学变化,而促凋亡蛋白Bax、Caspase-3和Caspase-9表达水平显著降低,抗凋亡相关蛋白Bcl-2表达水平显著升高。本研究发现多肽gCK-16能显著增强IBDV弱毒疫苗的体液免疫和细胞免疫应答,对感染IBDV的鸡可以起到有效的免疫保护效果,为该多肽作为IBDV弱毒疫苗免疫增强剂的应用提供了理论参考和数据支撑。

多肽gCK-16  /  传染性法氏囊病  /  免疫增强剂  /  鸡  /  免疫球蛋白  /  免疫保护

This experiment aims to study the immune-enhancing effects of peptide gCK-16 combined with the attenuated vaccine of infectious bursal disease (IBD) and to evaluate the protective effects of the vaccination on SPF chickens(14-day-old). To investigate the toxicity of the peptide gCK-16, the immune effect of vaccine and the levels of cytokines (IFN-γ, IL-4 and IL-6) in serum, the cells were stimulated by the different concentrations of peptide gCK-16 in vitro, and then the chickens were immunized with the different concentrations of peptide gCK-6 in combination with attenuated vaccine of IBD. Meanwhile, the challenge protection of infectious bursal disease virus (IBDV) was performed by detecting the survival rate, the bursa-weight/body-weight index (BBIX), the splenic lymphocyte viability, the level of immunoglobulin (IgM and IgA), the level of immunoglobulin (IgY) in the serum, the histopathological changes and the expression level of apoptosis-related proteins in the bursa. The results show that peptide gCK-16 has no obvious toxicity both in vivo and in vitro, and peptide gCK-16 combined with the attenuated vaccine of IBD can significantly increase the antibody titer of IBDV in the serum of chickens immunized with the attenuated vaccine of IBD and the level of cytokines (IFN-γ, IL-4 and IL-6) in the serum. Moreover, the peptide gCK-16 significantly promoted the stimulation index of LPS, ConA and IBDV to PBMCs. Immunization and challenge experiments also showed that the peptide gCK-16 significantly increased the survival rate and BBIX of chickens infected with IBDV, and reduced the pathological changes of bursa tissues, while the expression levels of pro-apoptotic proteins Bax, Caspase-3, Caspase-9 were significantly decreased, and the expression level of anti-apoptotic protein Bcl-2 was significantly increased. In conclusion, peptide gCK-16 can significantly enhance the humoral and cellular immune responses of the attenuated vaccine of IBD, and achieved an effective immune protection in chickens infected with IBDV, which provides theoretical reference and data support for the application of this peptide as an immunopotentiator of the attenuated vaccine of IBD.

peptide gCK-16  /  infectious bursal disease  /  immunopotentiator  /  chicken  /  immunoglobulin  /  immune protection
张秋雨, 岳锋, 冯康, 牛瑞燕, 李鹏, 朱艳平, 祝仰钊, 孙子龙, 王选年. 多肽gCK-16对鸡传染性法氏囊病弱毒疫苗免疫效果的影响. 畜牧兽医学报, 2026 , 57 (3) : 1683 -1696 . DOI: 10.11843/j.issn.0366-6964.2026.03.043
Qiuyu ZHANG, Feng YUE, Kang FENG, Ruiyan NIU, Peng LI, Yanping ZHU, Yangzhao ZHU, zilong SUN, Xuannian WANG. The Effect of Peptide gCK-16 on the Immune Efficacy of Attenuated Vaccine of Infectious Bursal Disease in Chickens[J]. Acta Veterinaria et Zootechnica Sinica, 2026 , 57 (3) : 1683 -1696 . DOI: 10.11843/j.issn.0366-6964.2026.03.043
传染性法氏囊病(infectious bursal disease,IBD)是由传染性法氏囊病病毒(infectious bursal disease virus,IBDV)引起的一种急性高度接触性传染病,主要侵害3~6周龄的幼鸡,通过破坏法氏囊中的未成熟B淋巴细胞,降低机体的体液免疫反应能力[1⁃3]。目前,IBD的预防主要通过接种HVT-VP2重组活载体疫苗、免疫复合物疫苗和弱毒疫苗来实现,其中弱毒疫苗使用过量可能会产生残留毒力并转化为致病性野生型的风险,使鸡对其它疾病的易感性增加,甚至导致免疫失败,给家禽养殖业造成巨大的经济损失[4⁃5]。疫苗免疫后至少需要10~12 d才能检测到抗体,这段时间是IBDV的“危险窗口期”,一旦生物安全措施防护不到位,极其容易遭受IBDV的感染,引起严重的原发性免疫抑制,从而使机体对其他病原的易感性增强,并降低对疫苗的免疫反应[6⁃8]。
目前,疫苗接种是预防和控制传染病的最有效手段之一[9]。随着疫苗技术发展,疫苗由最初的减毒活疫苗、灭活疫苗逐渐发展为亚单位疫苗、基因重组疫苗,其安全性越来越高,但是由于某些疫苗抗原的免疫原性有限,这就要求添加合适的佐剂来提高疫苗的免疫效果,起到疫病防控的作用[10⁃12]。另外,与其他家畜相比,家禽养殖密度高、生长周期短、疾病种类多等因素,其整个生长周期需要接种的疫苗数量和类型较多,这既带来了疾病防控的保障,也对家禽健康和生产效益带来了诸多挑战[13⁃14]。如何在保证安全的前提下,最大限度地提高家禽的免疫原性是现代疫苗领域亟需解决的重大问题。通常认为添加合适的佐剂来提高机体的免疫效果,从而达到疫苗预防的目的。佐剂作为一种免疫增强剂,是提前与已知抗原混合后注入机体,能够增强机体对抗原免疫应答,使其产生高效且持久的免疫应答,同时能够减少免疫抗原的用量,降低生产成本以及减弱免疫接种反应[15]。传统疫苗佐剂(如铝佐剂)已广泛用于疫苗生产,其主要通过静电吸附和配体交换将抗原紧密结合以增强抗原递呈细胞的抗原摄取和递呈,但是难以诱导机体产生更强的细胞免疫应答能力[16⁃17]。另外,铝盐佐剂带来的副作用也不容小觑,例如,发热、肿胀、神经毒性、体内残留等[18]。越来越多的研究致力于设计更有效和更安全的免疫增强剂作为疫苗佐剂,以期更有效促进疫苗激活机体的免疫系统,使机体提前产生阳性抗体,从而有效抵御该病毒的侵袭[17]。因此,迫切需要研制新型、安全、有效的疫苗佐剂。
研究表明,程序性细胞死亡受体1(PD-1)/程序性细胞死亡配体1(PD-L1)参与了导致机体淋巴细胞耗竭和凋亡的免疫逃逸机制,促进了慢性病毒感染导致的免疫抑制[19⁃20]。PD-1是一种免疫抑制性受体,其过度表达会导致B淋巴细胞免疫功能障碍,从而导致免疫抑制进展加快[18]。笔者前期研究表明,IBDV感染可以显著增强鸡法氏囊组织和B淋巴细胞中PD-1/PD-L1的表达;并筛选出靶向鸡PD-1高亲和力多肽gCK-16,可以有效阻断PD-1/PD-L1结合,减弱IBDV感染引起的B淋巴细胞损伤,增强B淋巴细胞功能[21]。但是多肽gCK-16在体内能否诱导高效的细胞免疫应答和体液免疫应答仍不清楚。
在本研究中,笔者利用IBD弱毒疫苗单独或联合多肽gCK-16免疫SPF鸡,并进行效力检验,评估多肽gCK-16对IBD弱毒疫苗诱导机体的免疫反应及其对IBDV感染提供保护的效力。这种以多肽gCK-16作为IBD弱毒疫苗免疫增强剂的研究,为提高机体的免疫应答和降低弱毒疫苗免疫剂量提供了理论支持。
鸡外周血单个核细胞(PBMCs)由本实验室分离和保存。DF-1和HD-11细胞均由本实验室保存。鸡传染性法氏囊病活疫苗(B87株)购自青岛易邦生物工程有限公司。IBDV LX毒株由扬州大学刘爵教授馈赠。SPF鸡胚购自勃林格殷格翰生物药业(中国)有限公司,SPF鸡由本实验室自行进行孵化。本研究中所有试验方案和内容符合山西农业大学动物伦理、福利等相关条例要求。
多肽gCK-16(CLIEYGGADYKTINLK)由上海吉尔多肽有限公司合成。青链新霉素混合液(100×)、MTT细胞毒性检测试剂盒、CCK-8试剂盒、BCA试剂、ECL Plus 超敏发光液、鸡外周血淋巴细胞分离液试剂盒和鸡脾脏淋巴细胞分离液试剂盒均购自北京索莱宝科技有限公司。胎牛血清购自美国Invigentech公司。鸡传染性法氏囊病病毒抗体(IBDV Ab)ELISA检测试剂盒、鸡白细胞介素4(IL-4)ELISA检测试剂盒、鸡白细胞介素6(IL-6)ELISA检测试剂盒、鸡干扰素γ(IFN-γ)ELISA检测试剂盒、鸡免疫球蛋白M(IgM)ELISA检测试剂盒、鸡免疫球蛋白A(IgA)ELISA检测试剂盒和鸡免疫球蛋白Y(IgY)ELISA检测试剂盒购自上海酶联生物科技有限公司。鸡天门冬氨酸氨基转移酶(AST)ELISA检测试剂盒和鸡丙氨酸氨基转移酶(ALT)ELISA检测试剂盒购自武汉吉立德生物科技有限公司。Bax抗体、Bcl-2抗体、Caspase-3抗体和Caspase-9抗体购自上海艾比玛特医药科技有限公司。
将40只2周龄SPF鸡随机分为4组,每组10只,分别为对照组(Mock),10 μg多肽组,50 μg多肽组,100 μg多肽组,各组受试鸡注射剂量为100 μL的PBS多肽gCK-16稀释液,其中Mock组注射100 μL PBS,在负压鸡隔离器中进行饲养。持续观察10 d鸡的临床表现,记录体温变化,并在10 d时分离血清。然后,按照ELISA 试剂盒说明书的操作步骤,检测血清中AST和ALT的活性状况。
依据鸡外周血淋巴细胞分离液试剂盒说明书分离鸡PBMCs。具体方法:采集2周龄的SPF鸡的抗凝血,加等体积稀释液进行稀释。然后,在15 mL离心管中加适量分离液,将稀释后的血液轻轻平铺到分离液液面上方,水平转子,1 000 g离心30 min,出现明显分层,中间的白膜层为淋巴细胞层。小心吸取白膜层细胞到15 mL洁净的离心管中,PBS洗涤细胞,在含10%胎牛血清和5%鸡血清的RPMI-1640培养基中进行培养,用于后续试验。
依据MTT细胞毒性检测试剂盒说明书检测多肽对细胞的毒性。具体方法:收集对数期细胞(PBMCs、DF-1和HD-11),调整细胞浓度,1×104·孔-1,铺于96孔板中,37 ℃、5% CO2细胞培养箱中继续培养24 h,加入不同浓度的多肽(10、50、250和500 nmol·L-1),继续培养24 h。然后,弃上清,加入90 μL新鲜培养液和10 μL MTT溶液,继续培养4 h,弃上清,加110 μL Formazan溶解液,低速振荡10 min。最后,用酶标仪在490 nm 处测定吸光值,计算细胞毒性活力。
将150只2周龄的SPF鸡随机分为5组,每组30只,分别为Mock组、疫苗组(Vaccine)、疫苗+gCK-16_低浓度组(Vaccine+gCK-16_L,6.25 μg·只-1)、疫苗+gCK-16_中浓度组(Vaccine+gCK-16_M,12.5 μg·只-1)和疫苗+gCK-16_高浓度组(Vaccine+gCK-16_H,25 μg·只-1),按照IBD弱毒疫苗使用说明书进行免疫,Mock组则用相同体积的生理盐水,在负压鸡隔离器中进行饲养。受试鸡在免疫后0、7、14、21、28和35 d采集血液,分离血清。然后,按照ELISA试剂盒说明书的操作步骤,检测血清中IBDV抗体水平和细胞因子(IFN-γ、IL-4和IL-6)水平。
采集免疫后21和35 d受试鸡的血液,按照鸡外周血单个核细胞分离液试剂盒说明书进行PBMCs的分离。将分离的鸡PBMCs铺于96孔细胞培养板中,每孔中分别加入脂多糖(LPS)、刀豆素(ConA)和IBDV,LPS的终浓度为10 μg·mL-1,ConA的终浓度为5 μg·mL-1,IBDV MOI=1,未刺激孔不加LPS、ConA和IBDV LX毒株,空白孔只加培养基。37 ℃、5% CO2细胞培养箱中继续培养48 h后,加入CCK-8溶液继续培养2 h,用酶标仪在450 nm处测定吸光度。依据以下公式计算刺激指数(stimulation index),stimulation index=(LPS/ConA/IBDV孔OD450 nm-空白孔OD450 nm)/(未刺激孔OD450 nm-空白孔OD450 nm)。
依据注射后的多肽免疫增强效果的评价结果对免疫鸡实施攻毒保护试验,验证多肽gCK-16对IBD弱毒疫苗在鸡感染IBDV LX毒株后的保护效率,其免疫后攻毒时间参照文献报道和疫苗说明书上的效力检验[22]。将120只2周龄的SPF鸡随机分成4组,每组30只,分别为Mock组、IBDV组、Vaccine+IBDV组和Vaccine+gCK-16+IBDV组。各免疫组鸡通过点眼/滴鼻途径接种100 μL的IBDV弱毒疫苗,其多肽添加量为12.5 μg·只-1。免疫17 d后攻毒IBDV LX毒株(200 μL的105 ELD50),Mock组为生理盐水,在负压鸡隔离器中饲养。分别于攻毒后0、1、3、5、7和10 d,记录鸡体重、法氏囊重量、死亡情况,并绘制生存曲线。采集血液,分离脾淋巴细胞和血清,ELISA 检测免疫球蛋白IgY水平。同时,解剖受试鸡,取法氏囊组织分别保存在4%多聚甲醛溶液和-80 ℃冰箱中,进行后续的HE染色、ELISA 检测免疫球蛋白水平(IgM和IgA)和Western blot试验。根据记录的法氏囊重量计算鸡的囊重比(Bursa of Fabricius weight/Body weight ratio,BF/BW),其公式:BF/BW=(法氏囊重量/体重)×1 000[23]。
鸡脾脏淋巴细胞的分离方法,参考鸡脾脏淋巴细胞分离液试剂盒的说明书和文献报道方法略有改动[24]。首先,安乐死鸡,无菌摘取脾脏,撕去脾脏表面的被膜,用眼科剪剪碎研磨脾脏后过细胞过滤筛,制备鸡脾脏单细胞悬液。水平转子800 g,常温离心25 min后,离心管中细胞分四层,用巴氏德吸管小心吸取由上至下第二层的环状乳白色淋巴细胞层到新的离心管中,之后向离心管中加入适量的细胞洗涤液。然后,水平转子250 g,常温离心10 min后,弃上清,用5 mL细胞洗涤液清洗3次,用RPMI-1640完全培养基重悬细胞并进行计数。最后,按照CCK-8试剂盒说明书中的细胞活性检测的要求进行操作,评价肽gCK-16对IBDV LX毒株感染后脾淋巴细胞活力的影响。
将上述在4%多聚甲醛溶液中固定48 h的法氏囊组织,用不同浓度的酒精进行梯度脱水,石蜡包埋法氏囊组织,进行切片,二甲苯脱蜡,乙醇复水。最后,HE染色,树胶封片,其法氏囊组织病变在光学显微镜下观察,并拍照。
将上述保存在-80 ℃冰箱中的法氏囊组织,用RAPI(含蛋白酶抑制剂和磷酸酶抑制剂)进行裂解,超声破碎后离心取上清,通过BCA试剂检测蛋白浓度,调整蛋白浓度为4 μg·μL-1,其上样总蛋白为20 μg。另外,在蛋白样品中加5×loading buffer,100 ℃金属浴,煮8 min,待冷却后进行凝胶电泳,转至NC膜。然后,5%脱脂牛奶封闭,一抗过夜,二抗常温孵育1 h,TBST洗涤3次。最后,使用ECL Plus超敏发光液显示,并拍照。
每组试验进行3次重复,采用GraphPad Prism 8.0软件进行结果统计分析。所有数据以“平均值±标准误(x¯±sx¯)”表示,除非另有特殊说明。数据分析采用单因素方差分析(*.P<0.05,**.P<0.01)。
如图1A所示,与对照组相比,不同剂量的多肽gCK-16注射鸡后无明显的体温变化。ELISA结果显示,与Mock相比,注射不同剂量的多肽gCK-16后,鸡血清中AST和ALT含量均没有显著差异,说明多肽对肝脏没有毒性(图1B和C)。MTT方法结果显示,不同浓度的多肽gCK-16处理PBMCs、DF-1和HD-11后,其细胞活力均在100%左右(图1D和E)。这些结果表明,多肽gCK-16在体内和体外具有较好的安全性,没有明显的毒性。
采用ELISA试剂盒对所采集的免疫后0、7、14、21、28和35 d鸡血清中IBDV抗体浓度进行检测,从图2可以看出,在免疫0 d后,各组IBDV抗体浓度没有明显差异,而在免疫后7、14、21、28和35 d,与Vaccine组相比,Vaccine+gCK-16_M组和Vaccine+gCK-16_H组抗体浓度显著升高。这些结果表明,多肽gCK-16联合IBD弱毒疫苗免疫后,能显著提高鸡血清中IBDV特异性抗体水平。
采用ELISA试剂盒对所采集的免疫鸡群的血清中细胞因子IFN-γ、IL-4和IL-6水平进行检测,从图3可以看出,在免疫后0 d,各组细胞因子IFN-γ、IL-4和IL-6水平没有明显变化,而在免疫后7、14、21、28和35 d,与Vaccine组相比,Vaccine+gCK-16_M组和Vaccine+gCK-16_H组IFN-γ、IL-4和IL-6水平显著升高。这些结果表明,多肽gCK-16联合IBD弱毒疫苗免疫后,能显著提高鸡血清中细胞因子水平。
通过CCK-8方法测定多肽gCK-16对鸡PBMCs增殖效果,从图4A中可见,在免疫后21 d,PBMCs经LPS、ConA和IBDV刺激后,与Vaccine组相比,Vaccine+gCK-16_M组和Vaccine+gCK-16_H组刺激指数均升高。在免疫后35 d,PBMCs经LPS、ConA和IBDV刺激后,与Vaccine组相比,Vaccine+gCK-16_M组和Vaccine+gCK-16_H组刺激指数均升高(图4B)。这些结果表明,多肽gCK-16能显著增加PBMCs增殖效应。
用IBDV毒株分别对两组免疫组和对照组鸡进行攻毒,连续10 d观察鸡的临床症状,并记录死亡状况、体重及法氏囊重量,从图5A中可见,在攻毒后10 d时存活率:Mock组为100%、IBDV组为40%、Vaccine+IBDV组为70%和Vaccine+gCK-16+IBDV组为90%。囊重比结果显示,与Mock组相比,IBDV感染后3 d,囊重比明显升高,IBDV感染后3、5、7 d和10 d,囊重比明显下降;与Vaccine+IBDV组相比,IBDV感染后5、7和10 d,Vaccine+gCK-16+IBDV组囊重比明显升高(图5B)。攻毒保护试验结果表明,多肽gCK-16可以显著提高鸡存活率和囊重比,并且可以有效保护法氏囊的正常发育。
通过 CCK-8方法检测多肽gCK-16对IBDV感染后脾淋巴细胞的活力,从图8A中可见,与Mock组相比,IBDV攻毒后3、5、7和10 d显著降低了脾淋巴细胞的活力,而与Vaccine+IBDV组相比,Vaccine+gCK-16+IBDV组脾淋巴细胞活力趋于正常(图6A)。ELISA结果显示,与Mock组相比,IBDV攻毒后7和10 d显著降低法氏囊中IgM水平,呈下降趋势;而与Vaccine+gCK-16+IBDV组相比,IBDV攻毒后5、7和10 d显著降低Vaccine+ IBDV组法氏囊中IgM水平(图6B)。此外,与Mock组相比,IBDV攻毒后5、7和10 d显著降低法氏囊中IgM和血清中IgY水平;而与Vaccine+gCK-16+IBDV组相比,IBDV攻毒后3、5、7和10 d显著降低Vaccine +IBDV组法氏囊中IgM和血清中IgA水平(图6C和D)。这些结果表明,多肽gCK-16联合IBD弱毒疫苗免疫后可以逆转IBDV感染导致鸡脾淋巴细胞活力和免疫球蛋白水平的下降。
如图7所示,与Mock组相比,IBDV攻毒后1 d,法氏囊组织病理变化较轻;在攻毒后3 d,淋巴滤泡水肿,髓质内淋巴细胞坏死、数量明显减少,皮质变薄;在攻毒后5 d,淋巴滤泡严重萎缩,滤泡间可见纤维组织增生,皮质大部分消失、脱落,髓质内淋巴细胞大量坏死减少、崩解,形成数量不等的空泡状,其周围环绕着未脱落的皮质;在攻毒后7和10 d,淋巴滤泡持续萎缩、间隙明显增宽,淋巴细胞坏死脱落,随着感染时间延长,其病理变化越来越明显,尤其是皮髓质分界不清;而Vaccine+IBDV组在IBDV攻毒后7 d,法氏囊有轻微的病理变化,淋巴滤泡间隙增宽,尤其是攻毒后10 d,淋巴滤泡结构模糊,皮质有明显的脱落,分界不清晰;而Vaccine+gCK-16+IBDV组法氏囊淋巴滤泡结构完整,发育正常,未见明显异常的病理变化。这些结果表明,多肽gCK-16联合IBD弱毒疫苗免疫后可以显著降低IBDV感染引起的法氏囊损伤。
Western blotting结果显示,IBDV感染后0和1 d,各组之间凋亡相关蛋白水平没有明显变化(图8A和B)。IBDV攻毒后3、5、7和10 d,与Mock组相比,IBDV组促凋亡相关蛋白Bax、Caspase-3和Caspase-9表达水平显著升高,抗凋亡相关蛋白Bcl-2 蛋白水平显著降低,而与Vaccine+IBDV组相比,Vaccine+gCK-16+IBDV组显著降低了促凋亡相关蛋白Bax、Caspase-3和Caspase-9表达水平,促进抗凋亡相关蛋白Bcl-2 表达水平(图8C、D、E和F)。这些结果表明,多肽gCK-16联合IBD弱毒疫苗免疫后可以显著降低IBDV感染引起的法氏囊细胞凋亡。
IBD弱毒疫苗正在全球范围内广泛使用,以控制该疾病,其效果也各不相同,尤其是在IBDV毒株变异和广泛流行的国家[25⁃27]。但鸡群中经常出现免疫力低下以及严重的疫苗接种反应,导致免疫保护效果不佳,继发或混合感染一些其他病原体。这是由于IBDV弱毒疫苗通常会引起法氏囊中度或重度萎缩,这与淋巴细胞耗竭有关,导致免疫抑制[28⁃29]。克服这些缺点的可用方法是开发免疫复合物疫苗或在免疫过程中尽量减少疫苗的接种体积[30⁃31]。因此,将免疫增强剂与IBD弱毒疫苗联合使用是解决这一问题的一种有效方法。
前期研究我们已成功设计和筛选可用于有效阻断PD-1/PD-L1结合的多肽gCK-16,在体外增强鸡B淋巴细胞功能方面进行了充分的验证[21]。在本研究中,多肽gCK-16联合IBD弱毒疫苗免疫鸡后,可以显著增强疫苗的免疫反应。另外,攻毒保护实验也表明,多肽gCK-16可以有效地促进针对IBDV感染的免疫保护作用。
PBMCs包含T淋巴细胞、B淋巴细胞和NK细胞[32]。其中,T淋巴细胞执行细胞免疫功能,B淋巴细胞是抗体产生的依赖性细胞,受抗原刺激之后发育为成熟的浆细胞,分泌抗体[33⁃34]。因此,淋巴细胞增殖通常用于评估淋巴细胞在体液和细胞免疫反应中的作用[35]。T淋巴细胞对Con A有反应,而B淋巴细胞对LPS有反应[36]。在本研究中,与仅用IBD弱毒疫苗免疫组相比,用含有多肽gCK-16联合IBD弱毒疫苗的鸡分离的PBMCs对Con A或LPS的增殖反应显著增加,表明T和B淋巴细胞都被激活。同时,在使用多肽gCK-16联合IBD弱毒疫苗组中,鸡血清中IBDV特异性抗体水平明显升高,与IBDV刺激的淋巴细胞增殖反应增加是一致的。这种增强的免疫反应可能是由于多肽gCK-16和IBD弱毒疫苗共同作用的结果。
细胞因子在禽类对致病性病原体的免疫反应中起着至关重要的作用[37⁃38]。Th1和Th2细胞是辅助T细胞中极其重要的两个亚群,Th1细胞主要通过分泌IFN-γ参与细胞免疫反应,而Th2细胞则主要参与体液免疫应答,通过分泌IL-4和IL-6等细胞因子,促进B淋巴细胞的增殖、分化和抗体的产生[39]。研究表明,鸡接种经典IBDV毒株疫苗后,可导致血清中IFN-γ和IL-6的上调[40]。此外,血清中IL-4水平的含量也是评价疫苗免疫效果的重要指标之一[41]。本研究结果表明,多肽gCK-16联合IBD弱毒疫苗免疫后可以显著提高血清中IFN-γ、IL-6和IL-4的表达水平,表明多肽gCK-16可以刺激Th1和Th2免疫反应,维持机体的正常免疫功能。
免疫器官的重量是评价家禽最常用的免疫指标之一[42]。在本研究中,发现IBDV攻毒后体重显著降低。此外,在感染后5、7和10 d,其法氏囊指数显著降低,这意味着IBDV感染的鸡法氏囊发生了严重病变,包括法氏囊萎缩和脱水。但是在感染后3 d法氏囊重量是增加的,这可能是由于在感染早期的代偿作用,而导致的法氏囊肿大。这些结果与之前的研究报道一致[43⁃44]。先前的一项研究表明,法氏囊病变与B淋巴细胞耗竭的程度有关[45]。本研究的攻毒保护试验结果显示,多肽gCK-16能显著提高鸡的存活率和法氏囊指数。IBDV感染导致法氏囊组织中淋巴细胞广泛坏死和耗竭,核损伤。重要的是,法氏囊由64.7%以上的B淋巴细胞组成[46]。此外,之前的研究表明,IBDV感染可以溶解B淋巴细胞,导致B淋巴细胞急剧减少,严重影响机体的免疫功能,降低机体特异性抗体水平,并增加疾病的易感性[47]。因此,本研究分析多肽gCK-16对IBDV感染后法氏囊中IgM和IgA以及血清中IgY水平的影响。ELISA分析结果显示,多肽gCK-16联合IBD弱毒疫苗免疫后,能显著提高IgM、IgA和IgY抗体水平,对免疫功能有正面影响。组织病理学分析也表明,多肽gCK-16可以减弱IBDV感染引起的法氏囊受损,与法氏囊指数基本相一致。
细胞凋亡在鸡的法氏囊损伤和免疫功能降低中起着至关重要的作用[48]。IBDV感染可以诱导法氏囊组织凋亡,笔者以前的研究结果也证实了这一点[21]。因此,炎症和细胞凋亡导致IBDV诱导的免疫损伤,可能是这些因素相互作用,导致机体的免疫抑制[49]。Western blotting结果表明,IBDV感染后,多肽gCK-16能显著抑制促凋亡相关蛋白Bax、Caspase-3和Caspase-9表达,促进抗凋亡蛋白Bcl-2表达。总的来说,本研究的结果清楚地表明,根据PBMCs刺激指数、IBDV抗体水平、细胞因子水平、存活率、法氏囊指数、免疫球蛋白水平、法氏囊组织病理学病变和凋亡相关蛋白水平等相关指标,多肽gCK-16对IBD弱毒疫苗具有显著的免疫增强作用,但其作为免疫增强剂应用到商品化疫苗中还需要后续大量的临床试验数据进行验证和支撑。
总之,在本研究中,证明了多肽gCK-16显著增强IBD弱毒疫苗的体液免疫和细胞免疫应答,在IBDV攻毒试验中,具有较好的保护效果。基于综合研究结果可以得出结论,多肽gCK-16作为IBD弱毒疫苗的免疫增强剂具有显著的潜力和价值。本研究为开发有效和易获得的免疫增强剂开辟了一条新的途径,为解决IBD弱毒疫苗使用过程中存在的问题提供了迫切办法。
  • 国家自然科学基金(31272539)
  • 国家自然科学基金(31672540)
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2026年第57卷第3期
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doi: 10.11843/j.issn.0366-6964.2026.03.043
  • 接收时间:2025-04-14
  • 首发时间:2026-09-16
  • 出版时间:2026-03-23
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  • 收稿日期:2025-04-14
基金
国家自然科学基金(31272539)
国家自然科学基金(31672540)
作者信息
    1.河南农业大学动物医学学院 国家动物免疫学国际联合中心,郑州 450046
    2.山西农业大学动物医学学院,晋中 030801
    3.龙湖现代免疫实验室,郑州 450046
    4.新乡学院生物工程学院,新乡 453003

通讯作者:

王选年,主要从事动物病理学和免疫学研究,E-mail:
孙子龙,主要从事环境刺激与机体应激研究,E-mail:
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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