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A NEW MOTILE, MULTICELLULAR STAGE INVOLVED IN HOST INVASION BY PARASITIC BARNACLES (RHIZOCEPHALA)

机译:寄生虫侵袭宿主的新分子多细胞阶段

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摘要

RHIZOCEPHALANS are barnacles (Cirripedia), but are extremely specialized for parasitic life on decapod crustaceans. A cypris larva settles and develops into a new instar, the kentrogon, which inoculates the host with the parasite. The very early primordial parasite has;been argued to consist solely of embryonic stem cells or even eggs(1), hut the true nature of this unknown stage has remained a puzzle for more than a century(2). We present data from in vitro experiments on the rhizocephalan Loxothylacus panopaei documenting that, unlike previous postulations, the recently injected parasite is not naked embryonic cells, but has the form of a motile, vermiform body, enclosed in an acellular sheath, After a period of maturation the vermiform body splits up into a number of naked and independently moving cells, which in our in vitro experiments disperse by amoeboid movements. This suggests that, in vivo, the cells disperse in the haemolymph of the host crab, where each has the potential to develop into an adult parasite, although in most cases only one will succeed. [References: 18]
机译:根瘤菌是藤壶(Cirripedia),但是非常专门用于十足纲甲壳类动物的寄生生活。赛普拉斯幼虫定居并发育成新的幼虫,即肯特龙,它用寄生虫接种宿主。最初的原始寄生虫曾经被认为仅由胚胎干细胞甚至卵子组成(1),但是这个未知阶段的真正本质在一个多世纪以来一直是一个难题(2)。我们提供了根瘤菌Loxothylacus panopaei的体外实验数据,该数据证明,与以前的假设不同,最近注入的寄生虫不是裸露的胚胎细胞,而是呈活动性的蠕虫状,被封闭在无细胞鞘中。成熟后,ver状体分裂成许多裸露的,独立运动的细胞,在我们的体外实验中,这些细胞通过类变形虫运动而分散。这表明,在体内,这些细胞分散在寄主蟹的血淋巴中,尽管在大多数情况下只有一种能成功,但它们在体内都有发展成成虫的潜力。 [参考:18]

著录项

  • 来源
    《Nature》 |1995年第6545期|p. 147-150|共4页
  • 作者

    Glenner H.; Hoeg JT.;

  • 作者单位

    UNIV COPENHAGEN INST ZOOL DEPT CELL BIOL & ANAT 15 UNIV PK DK-2100 COPENHAGEN DENMARK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

    Cirripedia; Crustacea;

    机译:卷柏;甲壳纲;

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