서브메뉴
검색
Prodromal Dysfunction in Vagal Systems in the Pink1-/- Rat Model of Parkinson Disease
Prodromal Dysfunction in Vagal Systems in the Pink1-/- Rat Model of Parkinson Disease
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105132
- ISBN
- 9798291572504
- DDC
- 616
- 서명/저자
- Prodromal Dysfunction in Vagal Systems in the Pink1-/- Rat Model of Parkinson Disease
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 285 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: A.
- 주기사항
- Advisor: Ciucci, Michelle R.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
- 초록/해제
- 요약Parkinson disease (PD) is increasingly understood as a disorder that affects multiple systems. Although best known for its hallmark motor disturbances, non-motor and other motor signs can manifest years prior to diagnosis during what is known as the prodromal stage of disease. These early signs often implicate vagal functions, resulting in early changes to gastrointestinal (GI) motility, swallowing, and vocalization. Despite their early manifestation, these prodromal signs remain understudied due to the challenges of identifying PD during its prodromal phase. Moreover, how sex influences the manifestation of these dysfunctions is not well understood. This dissertation uses the Pink1-/- rat, a well-established model of early-onset PD, to investigate vagal and non-vagal behaviors in both male and female rats in the prodromal stage.First, a preliminary study was completed to validate the Pink1-/- model for its use in studying swallowing and GI changes in 4-6-month-old male rats compared to wildtype (WT) controls. We hypothesized that Pink1-/- rats would demonstrate deficits in oropharyngeal swallowing and gastrointestinal motility at 4 months of age compared to healthy WT control rats. Results supported these hypotheses, as Pink1-/- rats exhibited slower mastication rates, reduced pharyngoesophageal bolus transit, increased abnormal swallowing behaviors, delayed colonic motility, and constipation-like signs. These findings confirmed the model's suitability for studying prodromal vagal dysfunction.Building on this foundation, the primary study examined vagally and non-vagally mediated behaviors at 4 months of age, expanding to include female rats, as well. Vocalizations (via ultrasonic vocalization analysis), swallowing and GI function (via videofluoroscopy), and limb motor performance (via Tapered Balance Beam) were assessed. We hypothesized that (1) Pink1-/- rats would show significantly decreased measures in vagal functions compared to WT controls, (2) Pink1-/- male rats would show significantly decreased measures in vagal functions compared to Pink1-/- females, and (3) male and female Pink1-/- rats would show significantly greater changes to vagal functions than limb motor function. Findings largely supported these hypotheses, as Pink1-/- rats showed significant deficits in GI function and semi-solid swallowing, as well as some vocal changes, while limb motor function remained relatively preserved. Sex-specific differences emerged primarily in GI outcomes, with Pink1-/- males showing the most pronounced deficits. Interestingly, sex differences in vocalization observed in WT rats were absent in Pink1-/- animals.Together, these findings indicate that vagally mediated functions are affected early in PD pathogenesis, potentially preceding traditional motor impairments. The identification of Pink1-/- and sex-specific patterns in prodromal dysfunction not only enhances our understanding of disease progression but also supports the use of vagal biomarkers for earlier diagnosis and targeted intervention strategies.
- 일반주제명
- Neurosciences
- 일반주제명
- Health sciences
- 일반주제명
- Speech therapy
- 일반주제명
- Communication
- 키워드
- Limb motor
- 키워드
- Swallowing
- 키워드
- Vagus nerve
- 키워드
- Voice
- 기타저자
- The University of Wisconsin - Madison Communicative Disorders
- 기본자료저록
- Dissertations Abstracts International. 87-02A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017359523
■00520260202105132
■006m o d
■007cr#unu||||||||
■020 ▼a9798291572504
■035 ▼a(MiAaPQ)AAI32239266
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616
■1001 ▼aKrasko, Maryann N.
■24510▼aProdromal Dysfunction in Vagal Systems in the Pink1-/- Rat Model of Parkinson Disease
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a285 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: A.
■500 ▼aAdvisor: Ciucci, Michelle R.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
■520 ▼aParkinson disease (PD) is increasingly understood as a disorder that affects multiple systems. Although best known for its hallmark motor disturbances, non-motor and other motor signs can manifest years prior to diagnosis during what is known as the prodromal stage of disease. These early signs often implicate vagal functions, resulting in early changes to gastrointestinal (GI) motility, swallowing, and vocalization. Despite their early manifestation, these prodromal signs remain understudied due to the challenges of identifying PD during its prodromal phase. Moreover, how sex influences the manifestation of these dysfunctions is not well understood. This dissertation uses the Pink1-/- rat, a well-established model of early-onset PD, to investigate vagal and non-vagal behaviors in both male and female rats in the prodromal stage.First, a preliminary study was completed to validate the Pink1-/- model for its use in studying swallowing and GI changes in 4-6-month-old male rats compared to wildtype (WT) controls. We hypothesized that Pink1-/- rats would demonstrate deficits in oropharyngeal swallowing and gastrointestinal motility at 4 months of age compared to healthy WT control rats. Results supported these hypotheses, as Pink1-/- rats exhibited slower mastication rates, reduced pharyngoesophageal bolus transit, increased abnormal swallowing behaviors, delayed colonic motility, and constipation-like signs. These findings confirmed the model's suitability for studying prodromal vagal dysfunction.Building on this foundation, the primary study examined vagally and non-vagally mediated behaviors at 4 months of age, expanding to include female rats, as well. Vocalizations (via ultrasonic vocalization analysis), swallowing and GI function (via videofluoroscopy), and limb motor performance (via Tapered Balance Beam) were assessed. We hypothesized that (1) Pink1-/- rats would show significantly decreased measures in vagal functions compared to WT controls, (2) Pink1-/- male rats would show significantly decreased measures in vagal functions compared to Pink1-/- females, and (3) male and female Pink1-/- rats would show significantly greater changes to vagal functions than limb motor function. Findings largely supported these hypotheses, as Pink1-/- rats showed significant deficits in GI function and semi-solid swallowing, as well as some vocal changes, while limb motor function remained relatively preserved. Sex-specific differences emerged primarily in GI outcomes, with Pink1-/- males showing the most pronounced deficits. Interestingly, sex differences in vocalization observed in WT rats were absent in Pink1-/- animals.Together, these findings indicate that vagally mediated functions are affected early in PD pathogenesis, potentially preceding traditional motor impairments. The identification of Pink1-/- and sex-specific patterns in prodromal dysfunction not only enhances our understanding of disease progression but also supports the use of vagal biomarkers for earlier diagnosis and targeted intervention strategies.
■590 ▼aSchool code: 0262.
■650 4▼aNeurosciences
■650 4▼aHealth sciences
■650 4▼aSpeech therapy
■650 4▼aCommunication
■653 ▼aGastrointestinal motility
■653 ▼aLimb motor
■653 ▼aParkinson disease
■653 ▼aSwallowing
■653 ▼aVagus nerve
■653 ▼aVoice
■690 ▼a0317
■690 ▼a0566
■690 ▼a0460
■690 ▼a0459
■71020▼aThe University of Wisconsin - Madison▼bCommunicative Disorders.
■7730 ▼tDissertations Abstracts International▼g87-02A.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359523▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


