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Asian Biomedicine
Volume 9 (2015): Numero 6 (December 2015)
Accesso libero
Intrauterine infection as a possible trigger for labor: the role of toll-like receptors and proinflammatory cytokines
Aishah Alamrani
Aishah Alamrani
,
Saeed Mahmoud
Saeed Mahmoud
e
Mohammed Alotaibi
Mohammed Alotaibi
| 31 gen 2017
Asian Biomedicine
Volume 9 (2015): Numero 6 (December 2015)
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Article Category:
Review article
Pubblicato online:
31 gen 2017
Pagine:
727 - 739
DOI:
https://doi.org/10.5372/1905-7415.0906.445
Parole chiave
Cytokines
,
infection
,
intrauterine
,
labor
,
myometrium
,
TLRs
,
uterus
© 2015 Aishah Alamrani, Saeed Mahmoud, Mohammed Alotaibi
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Figure 1
Schematic illustrating the role of toll-like receptors (TLRs) and proinflammatory cytokines in the onset of labor. Both pathogen associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs) produced in the uterus from different sources can activate various TLRs leading to the production of proinflammatory cytokines. The proinflammatory cytokines induce leukocyte infiltration and further increase the inflammatory cytokines directly or indirectly within the myometrium. This would create a positive-feedback loop by activating myometrial inflammation resulting in initiation of labor. ROS, reactive oxygen species; IL-1, interleukin-1; TNF-α, tissue necrosis factor α.
Figure 2
Schematic of proposed mechanisms of infection-induced labor. Infection triggers labor through various cellular mechanisms; the main pathways involved in this process are through contraction associated proteins (CAPs), prostaglandin E2 (PGE2), Rho factor/Rho-associated protein kinase (Rho/ROCK), and matrix metalloproteinases (MMPs). Arachidonic acid (AA), toxins, 15-hydroxyprostaglandin dehydrogenase (15-PGDH), nuclear factor kappa-light-chain-enhancer of activated B cells (NF-𝜅B) induced by infections mediate the PGE2-induced myometrial contractions. The CAPs, PGE2, Rho/ROCK, NF-𝜅B, and MMPs induced by infection can directly activate the myometrium to initiate the labor.