서브메뉴
검색
Loss of JAK1 Function Causes Radioresistance and G2/M Cell Cycle Defects Vulnerable to Kif18a Inhibition
Loss of JAK1 Function Causes Radioresistance and G2/M Cell Cycle Defects Vulnerable to Kif18a Inhibition
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091512.5
- ISBN
- 9798286444960
- DDC
- 572.6
- 서명/저자
- Loss of JAK1 Function Causes Radioresistance and G2/M Cell Cycle Defects Vulnerable to Kif18a Inhibition / Vanessa Martine Kelley
- 발행사항
- [Sl] : Yale University, 2025
- 형태사항
- 1 electronic resource (146 pages)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisors: Contessa, Joseph Committee members: Turk, Benjamin E.; Anderson, Karen S.; King, Megan; Kimple, Randy.
- 학위논문주기
- - Ph.D. : Yale University, 2025.
- 초록/해제
- 요약Although Head and Neck Squamous Cell Carcinoma (HNSCC) is the seventh most common cancer worldwide, the high failure rates and the absence of new effective therapies has caused the survival rate for HNSCC to remain stagnant for the past decade. As radiation is a frontline treatment for HNSCC, we sought to uncover novel targets that affect cellular responses to radiation-induced DNA damage. To do this, we performed a CRISPR-Cas9 knockout screen in HNSCC cell lines using radiation as a selection pressure. Our results identified that loss of Janus kinase 1 (JAK1) caused resistance to radiation in Cal27 and Detroit562 HNSCC cell lines. We generated JAK1 knockout (KO) cell lines and confirmed that loss of JAK1 causes radioresistance in both in vitro and in vivo models by enhancing the DNA damage induced G2 cell cycle arrest and by slowing mitosis. We find that this enhanced G2 arrest allows the cells to avoid mitotic stress and mitotic catastrophe following radiation treatment, thereby promoting cell survival. We measure multiple cellular outcomes of this enhanced G2 arrest that further contribute to the radioresistance of the JAK1 KO cells including decreased micronuclei formation, a reduction in apoptotic signaling, and enhanced homologous recombination dependent DNA repair usage.We endeavored to overcome the radioresistance in the JAK1 KO cells by abrogating their enhanced G2 arrest using Wee1 inhibitors, which lead to constitutive activation of CDK1. To our surprise, treatment with the Wee1 inhibitor adavosertib was unable reverse the prolonged G2 arrest in the JAK1 KO cells despite efficacy in controls and sufficient dephosphorylation of Y15 in CDK1. This indicated that a signaling axis outside of the canonical CDK1-dependent checkpoint is responsible for the enhanced G2 arrest of the JAK1 KO cells. We find delayed activation of Aurora kinase A (AURKA) and Polo-like kinase 1 (PLK1) in the JAK1 KO cells, consistent with reports that AURKA and PLK1 reactivation are necessary to overcome a DNA damage induced G2 arrest. Given the inability to abrogate the prolonged JAK1 KO G2 arrest by activating CDK1, we sought to exploit this enhanced G2 phenotype for therapeutic benefit. Kif18a is a kinesin that is involved with the maintenance of complex genomes and mitotic spindle tension. As cells with 2N genomes have been reported to be sensitive to Kif18a inhibition, we tested the specific Kif18a inhibitor sovilnesib in both in vitro and in vivo JAK1 KO models. Indeed, we found that addition of sovilnesib to radiation treatment radio sensitized JAK1 KO cells and xenograft tumors, providing therapeutic recourse for this resistant population. Together, our results reveal a novel role for JAK1 in regulating cell cycle progression and the cellular response to radiation treatment, as well as identify a novel therapeutic approach to target these resistant cells.
- 언어주기
- English
- 일반주제명
- Cellular biology
- 일반주제명
- Pharmacology
- 일반주제명
- Oncology
- 일반주제명
- Molecular biology
- 키워드
- Cancer
- 키워드
- Cell cycle
- 키워드
- Mitosis
- 키워드
- Radioresistance
- 키워드
- Janus kinase 1
- 기타저자
- Yale University Pharmacology
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260311s2025 us eng d■001000017356752
■00520260311091512.5
■006m o d
■007cr|nu||||||||
■020 ▼a9798286444960
■040 ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082 ▼a572.6
■1001 ▼aKelley, Vanessa Martine▼eauthor.
■24510▼aLoss of JAK1 Function Causes Radioresistance and G2/M Cell Cycle Defects Vulnerable to Kif18a Inhibition ▼cVanessa Martine Kelley
■260 ▼a[Sl]▼bYale University▼c2025
■264 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a1 electronic resource (146 pages)
■336 ▼atext▼btxt▼2rdacontent
■337 ▼acomputer▼bc▼2rdamedia
■338 ▼aonline resource▼bcr▼2rdacarrier
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisors: Contessa, Joseph Committee members: Turk, Benjamin E.; Anderson, Karen S.; King, Megan; Kimple, Randy.
■5021 ▼bPh.D.▼cYale University▼d2025.
■520 ▼aAlthough Head and Neck Squamous Cell Carcinoma (HNSCC) is the seventh most common cancer worldwide, the high failure rates and the absence of new effective therapies has caused the survival rate for HNSCC to remain stagnant for the past decade. As radiation is a frontline treatment for HNSCC, we sought to uncover novel targets that affect cellular responses to radiation-induced DNA damage. To do this, we performed a CRISPR-Cas9 knockout screen in HNSCC cell lines using radiation as a selection pressure. Our results identified that loss of Janus kinase 1 (JAK1) caused resistance to radiation in Cal27 and Detroit562 HNSCC cell lines. We generated JAK1 knockout (KO) cell lines and confirmed that loss of JAK1 causes radioresistance in both in vitro and in vivo models by enhancing the DNA damage induced G2 cell cycle arrest and by slowing mitosis. We find that this enhanced G2 arrest allows the cells to avoid mitotic stress and mitotic catastrophe following radiation treatment, thereby promoting cell survival. We measure multiple cellular outcomes of this enhanced G2 arrest that further contribute to the radioresistance of the JAK1 KO cells including decreased micronuclei formation, a reduction in apoptotic signaling, and enhanced homologous recombination dependent DNA repair usage.We endeavored to overcome the radioresistance in the JAK1 KO cells by abrogating their enhanced G2 arrest using Wee1 inhibitors, which lead to constitutive activation of CDK1. To our surprise, treatment with the Wee1 inhibitor adavosertib was unable reverse the prolonged G2 arrest in the JAK1 KO cells despite efficacy in controls and sufficient dephosphorylation of Y15 in CDK1. This indicated that a signaling axis outside of the canonical CDK1-dependent checkpoint is responsible for the enhanced G2 arrest of the JAK1 KO cells. We find delayed activation of Aurora kinase A (AURKA) and Polo-like kinase 1 (PLK1) in the JAK1 KO cells, consistent with reports that AURKA and PLK1 reactivation are necessary to overcome a DNA damage induced G2 arrest. Given the inability to abrogate the prolonged JAK1 KO G2 arrest by activating CDK1, we sought to exploit this enhanced G2 phenotype for therapeutic benefit. Kif18a is a kinesin that is involved with the maintenance of complex genomes and mitotic spindle tension. As cells with 2N genomes have been reported to be sensitive to Kif18a inhibition, we tested the specific Kif18a inhibitor sovilnesib in both in vitro and in vivo JAK1 KO models. Indeed, we found that addition of sovilnesib to radiation treatment radio sensitized JAK1 KO cells and xenograft tumors, providing therapeutic recourse for this resistant population. Together, our results reveal a novel role for JAK1 in regulating cell cycle progression and the cellular response to radiation treatment, as well as identify a novel therapeutic approach to target these resistant cells.
■546 ▼aEnglish
■590 ▼aSchool code: 0265
■650 4▼aCellular biology
■650 4▼aPharmacology
■650 4▼aOncology
■650 4▼aMolecular biology
■653 ▼aCancer
■653 ▼aCell cycle
■653 ▼aMitosis
■653 ▼aRadioresistance
■653 ▼aJanus kinase 1
■7102 ▼aYale University▼bPharmacology.▼edegree granting institution.
■7201 ▼aContessa, Joseph▼edegree supervisor.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356752▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
Preview
Export
ChatGPT Discussion
AI Recommended Related Books
Buch Status
- Reservierung
- frei buchen
- Meine Mappe
- Erste Aufräumarbeiten Anfrage
- Non-Book Loan Application
- Nighttime Book Loan Application
Available after logging in.


