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Cutaneous transcriptome analysis in NIH hairless mice.

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NIH hairless mice show abnormal hair development and immune pathway alterations. RNA-sequencing identified key genes like Pik3r1 and Pik3r3, offering insights into skin tumorigenesis and hair follicle development.

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Area of Science:

  • Dermatology
  • Genomics
  • Molecular Biology

Background:

  • Spontaneous coat mutations in mice serve as valuable models for skin development and cancer research.
  • NIH hairless mice exhibit distinct skin phenotypes, necessitating detailed molecular investigation.

Purpose of the Study:

  • To investigate skin hair growth cycle abnormalities in NIH hairless mice.
  • To identify differentially expressed genes (DEGs) and key pathways involved in hair development and tumorigenesis using RNA-sequencing.

Main Methods:

  • Hematoxylin-eosin (H&E) staining for histological examination of skin.
  • RNA-sequencing (RNA-Seq) of dorsal skin from NIH and NIH hairless mice.
  • Bioinformatic analyses including pathway analysis and gene interaction network construction.
  • Quantitative real-time PCR (q-PCR) for validation of RNA-Seq results.

Main Results:

  • 5,068 differentially expressed genes (DEGs) were identified between NIH and NIH hairless mice.
  • Up-regulated pathways in hairless mice included basal cell carcinoma, cell cycle, Hippo, Hedgehog, and Wnt signaling.
  • Down-regulated pathways included signal transduction, bacterial/parasitic infection, and calcium signaling.
  • Key genes Pik3r1 and Pik3r3 were identified through gene interaction network analysis.

Conclusions:

  • NIH hairless mice display significant hair development and immune-related pathway abnormalities.
  • The identified DEGs and pathways provide a foundation for further research into hair follicle development and skin cancer.
  • RNA-Seq and subsequent validation confirm the differential gene expression profiles in mutant mice.