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The role of transforming growth fact...

Ball, Corbie.

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The role of transforming growth factor beta signaling in inflammation-dependent colon cancer.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The role of transforming growth factor beta signaling in inflammation-dependent colon cancer./
作者:	Ball, Corbie.
面頁冊數:	91 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-03(E), Section: B.
Contained By:	Dissertation Abstracts International77-03B(E).
標題:	Oncology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3733219
ISBN:	9781339214276

The role of transforming growth factor beta signaling in inflammation-dependent colon cancer.
Ball, Corbie.

The role of transforming growth factor beta signaling in inflammation-dependent colon cancer. - 91 p.

Source: Dissertation Abstracts International, Volume: 77-03(E), Section: B.

Thesis (Ph.D.)--The University of Arizona, 2015.

Chronic inflammatory conditions such as Crohn's disease (CD) and Ulcerative colitis (UC) are risk factors for colon cancer. TGFbeta has been shown to be dysregulated in colon cancer. Bacteria-induced inflammation is necessary for the induction of colon cancer in TGFbeta mouse models. However, the mechanism by which TGFbeta regulates the inflammatory response in these models is not well elucidated. It was our thought that we needed to be able to distinguish what was TGFbeta dependent and what was inflammation dependent. To do this we created 2 colonies of Smad3 mice. One colony was housed with normal colonic bacteria (Smad3-uninfected animals) and the other colony (Smad3-infected animals) had chronic H. hepaticus infection. As previously seen the Smad3-/--infected animals developed colitis and carcinoma (~40%).

ISBN: 9781339214276Subjects--Topical Terms:

751006
Oncology.

The role of transforming growth factor beta signaling in inflammation-dependent colon cancer.
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502 $a Thesis (Ph.D.)--The University of Arizona, 2015.
520 $a Chronic inflammatory conditions such as Crohn's disease (CD) and Ulcerative colitis (UC) are risk factors for colon cancer. TGFbeta has been shown to be dysregulated in colon cancer. Bacteria-induced inflammation is necessary for the induction of colon cancer in TGFbeta mouse models. However, the mechanism by which TGFbeta regulates the inflammatory response in these models is not well elucidated. It was our thought that we needed to be able to distinguish what was TGFbeta dependent and what was inflammation dependent. To do this we created 2 colonies of Smad3 mice. One colony was housed with normal colonic bacteria (Smad3-uninfected animals) and the other colony (Smad3-infected animals) had chronic H. hepaticus infection. As previously seen the Smad3-/--infected animals developed colitis and carcinoma (~40%).
520 $a In the absence of H. hepaticus infection SMAD3 was found to negatively regulate TLR4 expression. This was then exacerbated with the addition of H. hepaticus resulting extreme up-regulation of TLR4 and the downstream effectors IRAK4 and NF-kappaB in Smad3 -/--infected colonic tissues.
520 $a Examination of adaptive immune regulation in this model demonstrated that SMAD3 was necessary for FOXP3 expression in H. hepaticus-infected splenocytes. Loss of SMAD3 resulted in up-regulation of IL17 and reduced iTreg populations.
520 $a These data demonstrate the important role SMAD3 has in maintaining tolerance to microbial populations through both the innate and adaptive immune systems.
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