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瑞典卡罗琳医学院科学家发现新器官或帮助人类感受疼痛信息Schwanncells施万细胞

(2019-09-03 05:06:04)
施万细胞
瑞典卡罗琳医学院科学家发现新器官或帮助人类感受疼痛信息Schwanncells施万细胞
 美媒称,科学家发现了一个潜伏在皮肤下的以前未知的器官,这个器官可能能够帮助人类感受到针刺的疼痛。这项研究报告的资深作者、瑞典卡罗琳医学院组织生物学教授帕特里克·埃恩福什说:“长久以来,我们知道皮肤中有各种各样的感觉器官,但是我们所知道的大多只是与触觉有关。”

埃恩福什说,构成这个器官的细胞名叫施万细胞,每一个看起来都“有点像一只章鱼”,长长的、类似触手的突出物延伸到周围的神经。众所周知,施万细胞包围和隔离神经。

报道称,当这些细胞被激活时,老鼠会撤回自己的爪子,这表明它们感到疼痛。老鼠还会表现出应对行为,比如舔和摇晃自己的爪子。

埃恩福什说:“当我们关闭这些细胞时,这些动物对于刺痛较之普通老鼠感觉到的压力和痛苦都要少得多。”然而,当研究人员关闭这些细胞,然后测试这些动物对冷和热的敏感度,老鼠能够同样充分地感受到冷热,与细胞没有关闭时一样。
2019年8月29日西海都市报新华社
Scientists at the karolinska institute in Sweden have discovered new organs that could help humans sense pain
Schwann cells
Scientists have discovered a previously unknown organ lurking under the skin that may help humans feel the sting of a needle, us media reported. "We've known for a long time that there are a variety of sensory organs in the skin, but most of what we know is about touch," said Patrick enfush, senior author of the study and a professor of tissue biology at the Caroline medical school in Sweden.

The cells that make up the organ, called schwann cells, each look "a bit like an octopus," Dr. Enfoush said, with long tentacle-like protrusions extending into the surrounding nerves. Schwann cells are known to surround and isolate nerves.

When the cells were activated, the mice withdrew their claws, indicating pain, the report said. Rats also exhibit coping behaviors, such as licking and shaking their PAWS.

"When we turned these cells off, the animals felt much less stress and pain than normal mice," enfusch said. However, when the researchers turned off the cells and then tested the animals' sensitivity to both heat and cold, the mice felt heat and cold just as well as when the cells were not turned off.
Xinhua news agency, xihai metropolis daily, Aug. 29, 2019

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