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List Labs公司最受歡迎的科研毒素試劑專題

       美國List Labs公司是世界著名的科研毒素試劑供應(yīng)商,其產(chǎn)品包括難辨梭狀芽孢桿菌毒素A、B,志賀氏毒素,霍亂毒素,炭疽毒素(PA、LF、EF),百日咳毒素,白喉毒素,CRM197,破傷風(fēng)毒素,葡萄球菌腸毒素B,肉毒毒素,脂多糖(LPS),內(nèi)毒素等各類毒素,此外也提供相應(yīng)的毒素抗體與類毒素,包括破傷風(fēng)類毒素與難辨梭狀芽孢桿菌毒素A、B類毒素。其產(chǎn)品都是具有完全活性的優(yōu)質(zhì)純天然細(xì)菌毒素。 


百日咳毒素(Pertussis Toxins

      百日咳毒素(PTX),來源于:百日咳桿菌(Bordetella pertussis),是一種多亞基毒素,與很多哺乳動(dòng)物細(xì)胞結(jié)合,特異性作用于G蛋白,抑制G蛋白發(fā)揮信號通路的功能。PTX這種抑制信號通路的功能被廣泛應(yīng)用于細(xì)胞生物學(xué)研究。PTX 被廣泛應(yīng)用與刺激嚙齒類動(dòng)物模型的制備,比如:實(shí)驗(yàn)性自身免疫性腦脊髓炎動(dòng)物模型(EAE)。動(dòng)物模型的制備受很多因素的影響,例如:小鼠品系,性別,免疫劑量以及佐劑的應(yīng)用??蛻艨蓞⒖荚摦a(chǎn)品的應(yīng)用文獻(xiàn)。

貨號

產(chǎn)品名稱

規(guī)格

179A

Pertussis Toxin from B. pertussis (in Glycerol)

50ug

179B

Pertussis Toxin from B. pertussis (in Glycerol)

100ug

180

Pertussis Toxin from B. pertussis, Lyophilized in Buffer

50ug

181

Pertussis Toxin from B. pertussis, Lyophilized (Salt-Free)

50ug

備注:

180 ,181,179 區(qū)別?

天然的百日咳毒素在制備上稍有不同。其中180 是毒素溶解于緩沖液后凍干,因此是含鹽成分的。181 是純水溶解后凍干,因此是不含鹽的。而:179是溶解于甘油溶液??蛻艨梢罁?jù)文獻(xiàn)報(bào)道,針對相應(yīng)的實(shí)驗(yàn),選擇對應(yīng)的產(chǎn)品。

 

白喉毒素(Diphtheria Toxin )

      白喉?xiàng)U菌屬于革蘭氏陽性菌,在感染上呼吸道上皮細(xì)胞后,產(chǎn)生白喉毒素。白喉毒素水解后,形成兩部分,通過二硫鍵緊密結(jié)合在一起。N-端攜帶毒素的酶活性單位,C端與宿主受體肝細(xì)胞表皮生長因子結(jié)合后,通過內(nèi)吞作用進(jìn)入細(xì)胞內(nèi),終止蛋白合成以致細(xì)胞死亡。在細(xì)胞培養(yǎng)過程中,白喉毒素可抑制蛋白合成,而導(dǎo)致細(xì)胞死亡。白喉毒素被廣泛應(yīng)用于:去除轉(zhuǎn)基因小鼠中受體表達(dá)的細(xì)胞。

貨號

產(chǎn)品名稱

規(guī)格

150

Diphtheria Toxin, unnicked from Corynebacterium diphtheriae

100ug

 

破傷風(fēng)毒素(Tetanus Toxins )

      破傷風(fēng)毒素是破傷風(fēng)桿菌產(chǎn)生的一種神經(jīng)蛋白質(zhì)毒素,通過抑制抑制性神經(jīng)遞質(zhì)的釋放,引起超反射反應(yīng)和橫紋肌痙攣。因此,破傷風(fēng)毒素用于由破傷風(fēng)桿菌引起的疾病的疫苗研究。此外,破傷風(fēng)類毒素在疫苗研究中作為多糖的載體用于抵抗細(xì)菌性病原體。

貨號

產(chǎn)品名稱

規(guī)格

190A

Tetanus Toxin

25ug

190B

Tetanus Toxin

100ug

193

Tetanus Toxin C Fragment

10ug

199

Tetanolysin from Clostridium tetani

100ug

650A

Tetanus Toxin Light Chain, Recombinant

10ug

 

艱難梭菌 Difficile Toxins

      艱難梭菌是一種挑剔的、革蘭氏陽性、產(chǎn)芽胞厭氧菌,能引起嚴(yán)重的發(fā)病率和死亡率的感染性腹瀉和偽膜性結(jié)腸炎。其致病機(jī)理是通過激活修飾Rho蛋白的毒素AB,使結(jié)腸上皮細(xì)胞的肌動(dòng)蛋白細(xì)胞骨架遭到破壞,后細(xì)胞凋亡。該毒素被廣泛用于免疫病理學(xué)、細(xì)胞生物學(xué)研究。

貨號

產(chǎn)品名稱

規(guī)格

152C

Toxin A from Clostridium difficile

100ug

153

Toxin A Toxoid from Clostridium difficile

100ug

154

Toxin B Toxoid from Clostridium difficile

100ug

155A

Toxin B from Clostridium difficile

2ug

155B

Toxin B from Clostridium difficile

20ug

155D

Toxin B from Clostridium difficile

100ug

 

炭疽毒素(Anthrax Toxins

      炭疽毒素是由一種不常見的大型細(xì)菌。炭疽桿菌共產(chǎn)生三種毒素,一種稱為保護(hù)性抗原(PA),它護(hù)送另兩種毒素進(jìn)入人體或動(dòng)物細(xì)胞。一種稱為致死因子(LF),能破壞機(jī)體抵御外敵的白細(xì)胞,還有一種稱為浮腫因子(EF)。這三種毒素,并非獨(dú)立發(fā)揮作用,而是共同協(xié)作發(fā)揮其功能。目前關(guān)于炭疽桿菌的研究熱點(diǎn)集中于研究疫苗效果以及篩選潛在的致死因子(LF)酶活力的抑制因子。

貨號

產(chǎn)品名稱

規(guī)格

169A

Anthrax Lethal Factor (LF-A) , Recombinant from

Bacillus anthracis Native Sequence

0.1mg

171A

Anthrax Protective Antigen (PA), Recombinant from Bacillus anthracis

0.1mg

172A

Anthrax Lethal Factor (LF), Recombinant from Bacillus anthracis

0.1mg

177A

Anthrax Protective Antigen Fragment (PA 20) from Bacillus anthracis        

50ug

178A

Anthrax Edema Factor (EF), Recombinant from Bacillus anthracis

0.1mg

9169A

QD Anthrax Lethal Factor (LF-A), Recombinant from

Bacillus anthracisNative Sequence

0.1mg

9171A     

QD Anthrax Protective Antigen (PA), Recombinant from Bacillus anthracis

0.1mg

 

疫苗載體蛋白(Vaccine Carrier Proteins)

      很多滅活的毒素,比如:破傷風(fēng)類毒素、白喉類毒素和白喉毒素CRM197(天然突變株)作為載體蛋白用于疫苗開發(fā)中,刺激強(qiáng)免疫應(yīng)答。近,List Labs通過基因工程方法改造的百日咳毒素,保留了毒素的活性,也可用于疫苗載體蛋白。

貨號

產(chǎn)品名稱

規(guī)格

149

Diphtheria Toxin CRM197, Mutant

0.5mg

151

Diphtheria Toxoid, from Corynebacterium diphtheriae

0.5mg

184

Pertussis Toxin Mutant

50ug

191

Tetanus Toxoid from Clostridium tetani

25ug

191B

Tetanus Toxoid from Clostridium tetani

100ug

 

應(yīng)用文獻(xiàn):

·         Jamie N Sutherland.Characterization of a key neutralizing epitope on pertussis toxin recognized by the monoclonal antibody 1B7.Biochemistry. 2009 December 22; 48(50): 11982–11993. doi:10.1021/bi901532z. (應(yīng)用產(chǎn)品:百日咳毒素)

·         Sutherland JN.Antibodies recognizing protective pertussis toxin epitopes are preferentially elicited by natural infection versus acellular immunization.Clin Vaccine Immunol. 2011 Jun;18(6):954-62. doi: 10.1128/CVI.00561-10.(應(yīng)用產(chǎn)品:百日咳毒素)

·         Lin CC.Bhlhe40 controls cytokine production by T cells and is essential for pathogenicity in autoimmune neuroinflammation.Nat Commun. 2014 Apr 3;5:3551. doi: 10.1038/ncomms4551. (應(yīng)用產(chǎn)品:百日咳毒素)

·         Isabel A. Soellner.Differential aspects of immune cell infiltration and neurodegeneration in acute and relapse experimental autoimmune encephalomyelitis.Clinical Immunology (2013) 149, 519–529(應(yīng)用產(chǎn)品:百日咳毒素)

·         Chiang W. Lee.Expression and Immunogenicity of a Recombinant Diphtheria Toxin Fragment A in Streptococcus gordonii.APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Aug. 2004, p. 4569–4574.(應(yīng)用產(chǎn)品:白喉毒素)

·         Christina von Hunolstein.Relevance and Criticality in an External Quality Assessment for the Determination of Diphtheria Antitoxin.  J Immunol Clin Res 2(2): 1022.(應(yīng)用產(chǎn)品:白喉毒素)

·         Jingjing Jiao.Central Role of Conventional Dendritic Cells in Regulation of Bone Marrow Release and Survival of Neutrophils.The Journal of Immunology April 1, 2014 vol. 192 no. 7 3374-338. (應(yīng)用產(chǎn)品:白喉毒素)

·         Mehdi Yousefi.  Comparative in vitro and in vivo assessment of toxin neutralization by anti-tetanus toxin monoclonal antibodies.Human Vaccines & Immunotherapeutics.Volume 10, Issue 2, 2014. (應(yīng)用產(chǎn)品:破傷風(fēng)毒素)

·         Moayeri M.Correction of murine hemophilia A by hematopoietic stem cell gene therapy.Mol Ther. 2005 Dec;12(6):1034-42. (應(yīng)用產(chǎn)品:破傷風(fēng)毒素)

·         Xiang-He Lei.Using Phenotype MicroArrays to Determine Culture Conditions That Induce or Repress Toxin Production by Clostridium difficile and Other Microorganisms.PLoS ONE 8(2): e56545. doi:10.1371.(應(yīng)用產(chǎn)品:艱難梭菌)

·         Hercules Moura.Proteomic Analysis and Label-Free Quantification of the Large Clostridium difficile Toxins. International Journal of Proteomic. Article ID :293782. (應(yīng)用產(chǎn)品:艱難梭菌)

·         Pradeep K.Gupta.Role of N-Terminal Amino Acids in the Potency of Anthrax Lethal Factor.PLoS ONE 3(9): e3130. doi:10.1371. (應(yīng)用產(chǎn)品:炭疽毒素)

·         Fang H.Anthrax lethal toxin has direct and potent inhibitory effects on B cell proliferation and immunoglobulin production.J Immunol. 2006 May 15;176(10):6155-61. (應(yīng)用產(chǎn)品:炭疽毒素)