Skin Type-Dependent Development of Specialized Mechanosensory Neurons- [electronic resource]
Skin Type-Dependent Development of Specialized Mechanosensory Neurons- [electronic resource]
- 자료유형
- 학위논문파일 국외
- 최종처리일시
- 20240214100444
- ISBN
- 9798379612962
- DDC
- 616
- 서명/저자
- Skin Type-Dependent Development of Specialized Mechanosensory Neurons - [electronic resource]
- 발행사항
- [S.l.]: : Harvard University., 2023
- 발행사항
- Ann Arbor : : ProQuest Dissertations & Theses,, 2023
- 형태사항
- 1 online resource(129 p.)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
- 주기사항
- Advisor: Ginty, David D.
- 학위논문주기
- Thesis (Ph.D.)--Harvard University, 2023.
- 사용제한주기
- This item must not be sold to any third party vendors.
- 초록/해제
- 요약Tactile sensation is mediated by low-threshold mechanoreceptors (LTMRs), which can exhibit highly distinct morphological and physiological properties depending on the skin type they innervate. Somatosensory neurons embryonically labeled with TrkB and Ret innervate glabrous (non-hairy) skin forming Meissner corpuscles, while in hairy skin, they form longitudinal lanceolate endings around hair follicles. How developing LTMRs acquire their unique properties in distinct skin types is unknown. Here, we report that structural specialization of hairy skin and glabrous skin LTMRs arises at nearly identical times during development. Interestingly, individual sensory neurons that terminate along the border of glabrous and hairy skin exhibit branches that form hair follicle lanceolate endings and others that form Meissner corpuscles. Using mouse mutants with ectopic glabrous skin on the dorsal paw, we found that LTMRs that innervate ectopic skin regions form endings in accordance with the altered skin type. Additionally, we report the transcriptional signatures of glabrous skin- and hairy skin-innervating TrkB+ and Ret+ neurons, which during development, largely overlap. Lastly, we characterize BMP5 as a skin-derived cue expressed specifically in glabrous skin but absent in hairy skin. Sensory neuron-specific deletion of the BMP type I receptor Bmpr1a led to strikingly aberrant Meissner corpuscles while hairy skin was intact. These findings indicate that embryonic LTMRs are able to form both Meissner corpuscles and lanceolate endings. It is the skin region that differentially instructs LTMRs to acquire skin type relevant structural properties during postnatal development, in part through BMP signaling. Thus, the specification of mechanosensory neuron features is flexibly determined by target tissues.
- 일반주제명
- Neurosciences.
- 일반주제명
- Developmental biology.
- 일반주제명
- Biomedical engineering.
- 키워드
- Morphogenesis
- 키워드
- Target cues
- 키워드
- Touch end-organs
- 기타저자
- Harvard University Medical Sciences
- 기본자료저록
- Dissertations Abstracts International. 84-12B.
- 기본자료저록
- Dissertation Abstract International
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