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Transcription Factor 19: Regulating β-Cell Proliferation Through Modulating the DNA Damage Response Pathway- [electronic resource]
Transcription Factor 19: Regulating β-Cell Proliferation Through Modulating the DNA Damage Response Pathway- [electronic resource]
상세정보
- 자료유형
- 학위논문
- Control Number
- 0016933486
- International Standard Book Number
- 9798379728373
- Dewey Decimal Classification Number
- 612
- Main Entry-Personal Name
- Blumer, Joseph T.
- Publication, Distribution, etc. (Imprint
- [S.l.] : The University of Wisconsin - Madison., 2023
- Publication, Distribution, etc. (Imprint
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- Physical Description
- 1 online resource(111 p.)
- General Note
- Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
- General Note
- Advisor: Davis, Dawn B.
- Dissertation Note
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2023.
- Restrictions on Access Note
- This item must not be sold to any third party vendors.
- Summary, Etc.
- 요약Decreased functional β-cell mass is a driver of diabetes, which affects millions of people annually. Genome-wide association studies identified transcription factor 19 (Tcf19) as a potential causal gene for both type 1 and type 2 diabetes. Tcf19 is expressed in humans and rodents and is most highly in the pancreatic islet and upregulated in mouse models of non-diabetic obesity. TCF19 has known roles in β-cell proliferation and survival and regulates transcriptional networks in the DNA damage response (DDR) and inflammatory pathways. We generated a germline whole-body Tcf19 knockout (wbTcf19KO) mouse model to study Tcf19 in vivo. Lean wbTcf19KO mice weigh more than WT animals, but maintain euglycemia. However, loss of Tcf19 leads to hyperglycemia in response to chronic metabolic stress. Islets from wbTcf19KO are significantly smaller than WT and have an impaired proliferative response to short-term metabolic stress. Additionally, lean, but not high-fat diet fed wbTcf19KO mouse islets have increased DNA damage. Ultimately, our data provide evidence for Tc19 regulating β-cell proliferation through modulation of the DNA damage response pathway. To investigate the contributions attributed to Tcf19 within the β-cells, we generated a β-cell specific knockdown of Tcf19. Using the Ins1Cre driver, we achieved significant knockdown specific to the β-cells. Compared to controls, loss of β-cell Tcf19 does not impact β-cell identity or proliferative capacity. These data provide evidence that knockdown of β-cell Tcf19 is not sufficient to recapitulate the wbTcf19KO results. Considering the effects of loss of Tcf19 under stress conditions in male mice, wbTcf19KO and WT female mice were fed a high-fat high-sucrose diet for 8-weeks prior to mating and they were maintained on diet until postpartum day 0 (P0). At P0 there was no difference in β-cell proliferation rates as measured by Ki67 or Cyclin D2 gene expression. However, wbTcf19KO islets had significantly more islet DNA damage than WT islets, as measured by yH2AX Western Blot. Additionally, wbTcf19KO islets had significantly higher expression of Gadd45a and a trend toward increased Parp9 expression. These data indicate that loss of Tcf19 leads to accumulated islet DNA damage during pregnancy. Overall, Tcf19 regulates β-cell mass dynamics under stress conditions through modulating the DDR pathway.
- Subject Added Entry-Topical Term
- Endocrinology.
- Subject Added Entry-Topical Term
- Physiology.
- Index Term-Uncontrolled
- Tcf19
- Index Term-Uncontrolled
- β-cells
- Index Term-Uncontrolled
- DNA
- Index Term-Uncontrolled
- Damage response
- Index Term-Uncontrolled
- Transcription factor 19
- Added Entry-Corporate Name
- The University of Wisconsin - Madison Endocrinol-Reprod Physiol - LS
- Host Item Entry
- Dissertations Abstracts International. 84-12B.
- Host Item Entry
- Dissertation Abstract International
- Electronic Location and Access
- 로그인을 한후 보실 수 있는 자료입니다.
- Control Number
- joongbu:640004
MARC
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■020 ▼a9798379728373
■035 ▼a(MiAaPQ)AAI30529841
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a612
■1001 ▼aBlumer, Joseph T.
■24510▼aTranscription Factor 19: Regulating β-Cell Proliferation Through Modulating the DNA Damage Response Pathway▼h[electronic resource]
■260 ▼a[S.l.]▼bThe University of Wisconsin - Madison. ▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a1 online resource(111 p.)
■500 ▼aSource: Dissertations Abstracts International, Volume: 84-12, Section: B.
■500 ▼aAdvisor: Davis, Dawn B.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2023.
■506 ▼aThis item must not be sold to any third party vendors.
■520 ▼aDecreased functional β-cell mass is a driver of diabetes, which affects millions of people annually. Genome-wide association studies identified transcription factor 19 (Tcf19) as a potential causal gene for both type 1 and type 2 diabetes. Tcf19 is expressed in humans and rodents and is most highly in the pancreatic islet and upregulated in mouse models of non-diabetic obesity. TCF19 has known roles in β-cell proliferation and survival and regulates transcriptional networks in the DNA damage response (DDR) and inflammatory pathways. We generated a germline whole-body Tcf19 knockout (wbTcf19KO) mouse model to study Tcf19 in vivo. Lean wbTcf19KO mice weigh more than WT animals, but maintain euglycemia. However, loss of Tcf19 leads to hyperglycemia in response to chronic metabolic stress. Islets from wbTcf19KO are significantly smaller than WT and have an impaired proliferative response to short-term metabolic stress. Additionally, lean, but not high-fat diet fed wbTcf19KO mouse islets have increased DNA damage. Ultimately, our data provide evidence for Tc19 regulating β-cell proliferation through modulation of the DNA damage response pathway. To investigate the contributions attributed to Tcf19 within the β-cells, we generated a β-cell specific knockdown of Tcf19. Using the Ins1Cre driver, we achieved significant knockdown specific to the β-cells. Compared to controls, loss of β-cell Tcf19 does not impact β-cell identity or proliferative capacity. These data provide evidence that knockdown of β-cell Tcf19 is not sufficient to recapitulate the wbTcf19KO results. Considering the effects of loss of Tcf19 under stress conditions in male mice, wbTcf19KO and WT female mice were fed a high-fat high-sucrose diet for 8-weeks prior to mating and they were maintained on diet until postpartum day 0 (P0). At P0 there was no difference in β-cell proliferation rates as measured by Ki67 or Cyclin D2 gene expression. However, wbTcf19KO islets had significantly more islet DNA damage than WT islets, as measured by yH2AX Western Blot. Additionally, wbTcf19KO islets had significantly higher expression of Gadd45a and a trend toward increased Parp9 expression. These data indicate that loss of Tcf19 leads to accumulated islet DNA damage during pregnancy. Overall, Tcf19 regulates β-cell mass dynamics under stress conditions through modulating the DDR pathway.
■590 ▼aSchool code: 0262.
■650 4▼aEndocrinology.
■650 4▼aPhysiology.
■653 ▼aTcf19
■653 ▼aβ-cells
■653 ▼aDNA
■653 ▼aDamage response
■653 ▼aTranscription factor 19
■690 ▼a0409
■690 ▼a0719
■71020▼aThe University of Wisconsin - Madison▼bEndocrinol-Reprod Physiol - LS.
■7730 ▼tDissertations Abstracts International▼g84-12B.
■773 ▼tDissertation Abstract International
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16933486▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a202402▼f2024
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