Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=28357396
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\28357396
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Microb+Cell
2017 ; 4
(3
): 101-104
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Chlamydia trachomatis struggle to keep its host alive
#MMPMID28357396
Sixt BS
; Valdivia RH
; Kroemer G
Microb Cell
2017[Mar]; 4
(3
): 101-104
PMID28357396
show ga
Bacteria of the phylum Chlamydiae infect a diverse range of eukaryotic host
species, including vertebrate animals, invertebrates, and even protozoa.
Characteristics shared by all Chlamydiae include their obligate intracellular
lifestyle and a biphasic developmental cycle. The infectious form, the elementary
body (EB), invades a host cell and differentiates into the replicative form, the
reticulate body (RB), which proliferates within a membrane-bound compartment, the
inclusion. After several rounds of division, RBs retro-differentiate into EBs
that are then released to infect neighboring cells. The consequence of this
obligatory transition between replicative and infectious forms inside cells is
that Chlamydiae absolutely depend on the viability and functionality of their
host cell throughout the entire infection cycle. We recently conducted a forward
genetic screen in Chlamydia trachomatis, a common sexually transmitted human
pathogen, and identified a mutant that caused premature death in the majority of
infected host cells. We employed emerging genetic tools in Chlamydia to link this
cytotoxicity to the loss of the protein CpoS (Chlamydia promoter of survival)
that normally localizes to the membrane of the pathogen-containing vacuole.
CpoS-deficient bacteria also induced an exaggerated type-1 interferon response in
infected cells, produced reduced numbers of infectious EBs in cell culture, and
were cleared faster from the mouse genital tract in a transcervical infection
model in vivo. The analysis of this CpoS-deficient mutant yielded unique insights
into the nature of cell-autonomous defense responses against Chlamydia and
highlighted the importance of Chlamydia-mediated control of host cell fate for
the success of the pathogen.