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Functional amyloidogenesis in immunocytes from the colonial ascidian Botryllus schlosseri: Evolutionary perspective.

Abstract：

:Cytotoxic morula cells (MCs) and phagocytes are the circulating immunocytes of the colonial ascidian Botryllus schlosseri: Both these cells can synthesise amyloid fibrils, supporting the idea that physiological amyloidogenesis is involved in inflammation and modulation of immune responses. Intriguingly, amyloid of B. schlosseri immunocytes is made of two different proteins. MCs, the first cells to sense non-self and involved in the allorejection reaction between contacting genetically incompatible colonies, use melanin encapsulation as the principal method to fight non-self. They release amyloid fibrils formed by p102 protein that allow the packaging and deposit of melanin and other toxic molecules nearby the invader or in the contact region of incompatible colonies. Phagocytes release amyloid-based extracellular traps when challenged with microbes: their amyloid fibrils harbour BsAPP, an orthologue of the vertebrate amyloidogeneic protein APP. This strategy of immune response, present also in human neutrophils, allows phagocytes to block and engulf bacteria and fungi.

journal_name

Dev Comp Immunol

journal_title

Developmental and comparative immunology

authors

Franchi N,Ballarin L,Peronato A,Cima F,Grimaldi A,Girardello R,de Eguileor M

doi

10.1016/j.dci.2018.09.010

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

108-120

eissn

0145-305X

issn

1879-0089

pii

S0145-305X(18)30396-3

journal_volume

90

pub_type

杂志文章

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