Evaluation of Oral Bait Vaccine Efficacy Against Classical Swine Fever in Village Backyard Pig Farms in Bhutan

Control and eradication of classical swine fever (CSF) in countries with a high proportion of backyard holdings is a challenge. Conventional attenuated Chinese C‐strain vaccines, though safe and effective, are difficult to use in backyard farms due to various practical reasons. The aim of this study was to evaluate the efficacy of the CSF oral bait vaccine in village backyard pig farms and to assess the farmers' knowledge on CSF and motivation on using oral vaccines. The pigs were fed the bait by the farmers themselves; one bait was given on day 0, followed by second bait on the next day. Seventy‐three per cent (140 of 193 pigs) of vaccinated pigs had either a slight (2‐fold–3‐fold; 60 pigs) or significant (at least 4‐fold; 80 pigs) increase of the antibody titre against CSFV. A significant increase of the antibody titres was mainly observed in pigs with no pre‐vaccination titre (OR = 12, 95% CI = 4–40). The number of pigs with protective antibody titres (≥40) rose from 47 (24%) to 115 (60%) following vaccination. Only 30% of the farmers claimed to be familiar with CSF, although clinical signs they mentioned were rather unspecific and could relate to many other pig diseases. Most of the farmers claimed to be motivated to use oral vaccines if made available. The oral vaccine could be a substitute for the conventional attenuated CSF vaccines in areas where it is logistically difficult for veterinarians to visit. It may therefore be a useful tool to combat endemic CSF disease in regions where the disease continues to have a serious impact on the backyard farmers who depend on pig farming for their sustenance and livelihoods.     

Identification of human preformed antibody targets in GTKO pigs

Burlak C, Wang ZY, Chihara RK, Lutz AJ, Wang Y, Estrada JL, Tector AJ. Identification of human preformed antibody targets in GTKO pigs. Xenotransplantation 2012; 19: 92–101. © 2012 John Wiley & Sons A/S. Abstract: Background: Human preformed antibodies continue to recognize porcine xenografts, despite the advent of α‐galactosyltransferase knockout (GTKO) pigs. This study examined the potential reactivity of human preformed IgG and IgM antibodies toward antigens in the GTKO pig liver. Methods: Human serum was analyzed for the concentration of IgG, IgM, anti‐αgal antibody, anti‐non‐αgal antibody and cytotoxicity toward domestic and GTKO fibroblasts and liver sinusoidal endothelial cells (LSEC). We detected preformed antibodies in human serum directed toward GTKO pig liver cells and tissue samples using advanced proteomic techniques. The targets of preformed antibodies were identified by MALDI TOF TOF mass spectrometry and validated by confocal microscopy, immunoblot, and immunoprecipitation. Results: Human serum used in this study contained 2.06 μg/ml IgG and 0.013 μg/ml IgM directed toward GTKO fibroblasts. Human IgG and IgM bound to GTKO LSEC in a dose‐dependent manner and were cytotoxic. We detected 357 protein spots recognized by human IgG and 233 by human IgM. Two hundred and nineteen proteins were common to both human IgG and IgM. Mass spectrometry identified numerous immunoreactive proteins, of which 19 were membrane proteins on liver cells. The most significant to this study were α‐enolase, CFTR, and E‐cadherin, which were abundant in GTKO pig tissues and expressed on the surface of GTKO LSEC. Human IgG captured α‐enolase, CFTR, and E‐cadherin by immunoprecipitation validating the proteomic identification. Conclusion: These experiments indicate that several membrane antigens in GTKO pigs could be recognized directly by human IgG or IgM. Further studies on the contribution of these antigens to antibody‐mediated xenograft rejection are necessary.     

Characteristics of Lactoferrin Receptor in Bovine Intestine: Higher Binding Activity to the Epithelium Overlying Peyer's Patches

Several lines of evidence have recently demonstrated the occurrence of specific lactoferrin (Lf) receptors in different cells. We report here, for the first time, the characteristics of binding, and distribution of Lf receptors in the bovine intestinal tract with special emphasis on the epithelium overlying Peyer's patches (EOPP). Brush‐border membrane vesicles (BBMV) were prepared from the mucosa of duodenum, jejunum, ileum, colon, EOPP in jejunum and EOPP in ileum. Receptor binding assays were carried out using ¹²⁵I‐labelled bovine Lf. Specific and saturable Lf receptors were found in BBMV of all the intestinal segments examined. Non‐linear regression and Scatchard plot analyses clearly revealed that EOPP had the highest binding maximal (B_max), and lowest in colon. The maximum dissociation constant (K_d) 3.74 μm was in the ileum. We found that bovine transferrin competed with Lf for the same binding site of receptors. In contrast, no binding of bovine serum albumin occurred. It was concluded that Lf receptors in the mucosal lining are attributable to mediate multifunctional activities of Lf in the gut, especially in the EOPP.     

大鼠神经病理性疼痛模型血清和脑脊液补体C3的动态变化

目的观察大鼠神经病理性疼痛(NPP)模型的补体变化特点,探讨补体活化在NPP发病免疫机理中的作用和地位。方法健康雄性SD大鼠20只随机均分为假手术组(S组)和慢性坐骨神经压迫损伤组(CCI组),CCI组大鼠左侧坐骨神经给予松结扎,S组只暴露左侧坐骨神经不予其它处理。用免疫比浊法测定两组大鼠术前和术后第1、2、3、4、5、6、7天血清和脑脊液补体C3的含量。结果两组大鼠血清补体C3含量手术前后差异均无统计学意义。与术前相比,CCI组大鼠脑脊液补体C3含量明显升高(P<0.01),并在建模后第6天达高峰;而S组大鼠脑脊液补体C3含量无明显变化。结论外周神经损伤后,中枢神经系统存在补体异常活化现象,补体的这种变化特点可能在NPP的发生发展中发挥作用。     

An emerging equine parvovirus circulates in thoroughbred horses in north Xinjiang,China, 2018

In 2015, a novel equine parvovirus, equine parvovirus‐cerebrospinal fluid (EqPV‐CSF), was identified from cerebrospinal fluid of a horse with neurological signs and lymphocytosis in USA. In our study, an EqPV‐CSF‐like virus was detected from 15 serum samples of 65 imported thoroughbred horses during custom quarantine in north Xinjiang province, China. Further field investigation in several major horse‐producing areas in Xinjiang using specific PCR showed that this virus was detected mainly in thoroughbred horses (39/154 positive) previously imported, not in local breeds (0/127 positive). Phylogenetic analysis based on NS1 gene showed the virus was grouped together with EqPV‐CSF in genus Copiparvovirus. The study presents valuable information showing that EqPV‐CSF‐like virus was likely exotic and introduced into Xinjiang through international trade of horses.     

Porcine Dermatitis and Nephropathy Syndrome. Clinical and Pathological Features of Cases in the United Kingdom (1993–1998)

This paper documents the salient clinical and pathological features of porcine dermatitis and nephropathy syndrome (PDNS) in 96 pigs submitted from 55 units in the UK from 1993 to 1998. This series of cases pre‐dated the emergence of post‐weaning multisystemic wasting syndrome (PMWS) in the UK. The morbidity during outbreaks was 1% or less. Affected pigs ranged from 14 to 70 kg in weight and most died after a short clinical illness. Fifty‐five pigs had multifocal or coalescing erythematous skin lesions, some progressing to dermal necrosis. Biochemistry showed raised serum urea, creatinine and gamma globulin levels accompanied by proteinuria. All cases showed bilateral renal enlargement with petechiae throughout the cortices. Microscopically these renal lesions ranged in chronology from acute necrotizing glomerulitis and vasculitis with multiple hyaline casts in renal tubules to chronic glomerular sclerosis with interstitial inflammation and fibrosis. Haemorrhagic dermatitis when present was associated with necrotizing vasculitis in the dermal vessels. Vasculitis was sometimes detected in other tissues including subcutis, lymph nodes, spleen, liver, joint synovial membrane, gastric and intestinal submucosa or serosa and meninges but its frequency and distribution varied considerably in individual pigs. Immunostaining showed deposits of IgG and IgM in damaged glomeruli, renal casts and skin lesions. The aetiology and pathogenesis of the condition remain unknown but the histopathological and immunological findings suggest a systemic immune‐complex disorder resulting in vasculitis with particular predilection for kidney and skin.     

Successful cross‐breeding of cloned pigs expressing endo‐β‐galactosidase C and human decay accelerating factor

Yazaki S, Iwamoto M, Onishi A, Miwa Y, Suzuki S, Fuchimoto D, Sembon S, Furusawa T, Hashimoto M, Oishi T, Liu D, Nagasaka T, Kuzuya T, Maruyama S, Ogawa H, Kadomatsu K, Uchida K,
Nakao A, Kobayashi T. Successful cross‐breeding of cloned pigs expressing endo‐β‐galactosidase C and human decay accelerating factor. Xenotransplantation 2009; 16: 511–521. © 2009 John Wiley & Sons A/S. Abstract: Background: For successful organ xenotransplantation, genetically engineered pigs have been actively produced. Our attention has focused on (i) reduction of αGal expression by its digestion enzyme, endo‐β‐galactosidase C (EndoGalC), and (ii) inhibition of complement activation by human decay accelerating factor (hDAF). Cell sorting and nuclear transfer enabled the effective production of cloned pigs expressing transgene at high levels. We report the successful cross‐breeding of pigs expressing EndoGalC and hDAF. Methods: After hDAF and EndoGalC genes were transfected into pig fibroblasts from the fetus of Landrace × Yorkshire and Meishan, respectively, transfected cells expressing transgenes effectively were collected using a cell sorter. Cloned pigs were produced using the technology of somatic cell nuclear transfer. After cross‐breeding of cloned pigs, kidneys expressing both EndoGalC and hDAF were transplanted into baboons to examine the efficacy of gene transduction. Results: Well‐designed cloned pigs were produced by cross‐breeding. αGal expression levels in cloned pigs were reduced up to 2 to 14%, compared to that in wild‐type pigs. hDAF expression reached about 10‐ to 70‐fold, compared to that in human umbilical vein endothelial cells. No congenital deformity was observed. There was no problem of increased stillbirth rate or growth retardation. Hyperacute rejection could be avoided in such a cloned pig to baboon kidney transplantation without any treatment for anti‐pig antibody removal. However, grafts suffered from fibrin deposition as early as 1 h after transplantation, and were rejected after 1 week. Conclusions: Using a cell sorting system for effective collection of transfected cells, two types of cloned pigs were produced with a very high level of hDAF expression and a low level of αGal expression. Such genetic modification was effective in preventing hyperacute rejection, but there was an immediate lapse into procoagulation after transplantation, resulting in acute vascular rejection. Effective suppression of antibody binding to the graft would be necessary, even if a high level of hDAF is expressed.     

Virus Load in Pigs Affected with Different Clinical Forms of Classical Swine Fever

Summary Classical swine fever (CSF) is an endemic disease in India, but the real magnitude of the problem is not known as only outbreaks of acute CSF are reported and many cases of chronic and clinically inapparent forms of the disease, which manifest a confusing clinical picture, remain undiagnosed. The real status of classical swine fever virus (CSFV) infection can only be known by testing pigs with highly specific and sensitive diagnostic assays. To obtain the baseline prevalence of CSFV infection among pigs in an endemic region where no vaccination was being performed, a real‐time PCR assay was used to detect viral genetic material in tissue samples collected from a slaughterhouse in the northern state of Uttar Pradesh in India. In total, 1120 slaughtered pigs were examined for the presence of CSF suggestive pathological lesions and tissues from suspected cases were tested for the presence of CSFV antigen and nucleic acids by indirect immuno‐peroxidase test and real‐time PCR, respectively. Based on the detection of viral genetic material in the tonsils, the prevalence of CSFV infection among slaughtered pigs was found to be 7.67%. Pigs detected positive for viral genome by quantitative real‐time PCR assay when categorized into different forms of CSF, depending upon the pathological lesions observed, the viral load in the tonsils of some of the pigs with chronic or clinically inapparent form of the disease was similar to that detected in pigs with acute CSF. The results of the study suggested that the risk posed by pigs with chronic disease or those infected but showing no clinical disease may be relatively higher as they can transmit the virus to new susceptible hosts over a longer period of time.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.     

胰腺癌相关免疫原性膜抗原的筛查和鉴定

目的 应用蛋白质组学技术筛查、鉴定胰腺癌相关免疫原性膜抗原.方法 培养、提取并纯化胰腺癌细胞株SW1990的膜蛋白,将膜蛋白通过双向凝胶电泳(2-DE)进行分离,平行的3块2-DE凝胶分别行考马斯亮蓝染色和免疫印迹杂交.收集并纯化临床上66例胰腺癌和24例慢性胰腺炎患者血清中的IgG,分别与膜蛋白2-DE平行凝胶进行免疫印迹杂交.应用基质辅助激光解吸离子化飞行时间质谱分析杂交阳性蛋白位点,并经肽指纹库鉴定.应用RT-PCR、实时荧光定量PCR(real-time PCR)、Western blot方法对筛查出的膜抗原进行验证,并比较不同胰腺癌细胞株、正常胰腺组织中目的 膜抗原的基因及蛋白表达水平的差异.结果 胰腺癌细胞株SW1990膜蛋白与胰腺癌患者血清IgG免疫印迹杂交共出现9个阳性点,与同慢性胰腺炎IgG杂交所出现的2个阳性点无重复,经质谱分析鉴定出电压依赖性离子通道(VDAC)2可能是有潜力的候选膜抗原.经RT-PCR和real-time PCR验证,VDAC2基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达.Western blot实验结果表明,VDAC2在胰腺癌细胞株中的蛋白表达明显高于正常胰腺组织.结论 胰腺癌细胞膜蛋白VDAC2可能是具有免疫原性的胰腺癌相关膜抗原,其基因在胰腺癌细胞株SW1990、AsPc、P3中均有表达,并且在胰腺癌细胞株中的蛋白表达水平明显高于正常胰腺组织.