Robins-Browne R M, Takeda T, Fasano A, Bordun A M, Dohi S, Kasuga H, Fang G, Prado V, Guerrant R L
Department of Microbiology and Infectious Diseases, Royal Children's Hospital, Parkville, Victoria, Australia.
Infect Immun. 1993 Feb;61(2):764-7. doi: 10.1128/iai.61.2.764-767.1993.
Twenty-eight clinical isolates of Yersinia enterocolitica were investigated for their abilities to produce heat-stable enterotoxin (YST). All 21 invasive strains (serogroup O3 biotype 4) carried the previously described gene for YST (yst), with toxin detectable in culture supernatants from 20 strains. One of seven noninvasive, biotype 1A strains also had enterotoxic activity, despite failure to hybridize with a probe for yst. The toxin produced by this noninvasive (serogroup O6) strain resembled YST in terms of molecular size, heat stability, and solubility in methanol. It differed from YST, however, with respect to regulation of its production by temperature and its mechanism of action, which did not appear to involve cyclic GMP.
对28株小肠结肠炎耶尔森菌临床分离株产生热稳定肠毒素(YST)的能力进行了研究。所有21株侵袭性菌株(O3血清群生物型4)均携带先前描述的YST基因(yst),20株菌株的培养上清液中可检测到毒素。7株非侵袭性生物型1A菌株中的1株也具有肠毒素活性,尽管未能与yst探针杂交。该非侵袭性(O6血清群)菌株产生的毒素在分子大小、热稳定性和在甲醇中的溶解性方面与YST相似。然而,它在温度对其产生的调节及其作用机制方面与YST不同,其作用机制似乎不涉及环鸟苷酸。