在养,天生的免疫和行为调节中涉及的Placozoan分泌细胞类型
Tatiana D Mayorova1, Thomas Lund Koch2, Bechara Kachar3
1Laboratory of Neurobiology, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States of America.
bioRxiv : the preprint server for biology
|October 7, 2024
概括
朴素的海洋动物 - - Placozoa - - 使用多种不同的分泌细胞来食和防御. 这项研究确定了特定的细胞类型及其功能,揭示了对动物进化和神经类信号传递的洞察力.
科学领域:
- 海洋生物学 海洋生物学
- 细胞生物学 细胞生物学
- 进化生物学是进化的生物学.
背景情况:
- 斑块菌具有简单的体型,少有细胞类型,但转录基因数据表明细胞多样性更大.
- 之前对斑斑动物细胞类型和功能的研究产生了矛盾的结果.
- 在Placozoa中,各种分泌细胞类型的精确定位和形态识别仍然不清楚.
研究的目的:
- 用mRNA探针定位和识别Trichoplax adhaerens*中的多种分泌细胞类型.
- 研究Placozoa中的分泌颗粒的性质和功能.
- 将斑斑动物细胞类型与其他类型的细胞类型进行比较,以了解进化趋势.
主要方法:
- 使用mRNA探针定位分泌细胞,用于*Trichoplax adhaerens*的整体和分离培养.
- 电子显微镜用于研究分泌颗粒.
- 在食期间分泌的实时成像.
主要成果:
- 确定了两种不同的细胞类型参与了猎物解体,一种类似于哺乳动物的溶性细胞,另一种是生原体和肠细胞类细胞的混合体.
- 发现了参与防御的分泌上皮细胞,表达糖蛋白或短.
- 定位了七种类细胞类型和两种类型的粘细胞,澄清了细胞类型的多样性.
结论:
- 平动物拥有专门的分泌细胞,用于外部消化,对病原体的防御,以及潜在的神经类信号传递.
- 研究结果提供了斑块动物分泌细胞类型及其功能的详细地图.
- 这项研究提供了关于细胞类型进化的见解,以及动物协同形态的出现.
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