Personalized expression of bitter 'taste' receptors in human skin

PLoS One. 2018 Oct 17;13(10):e0205322. doi: 10.1371/journal.pone.0205322. eCollection 2018.

Abstract

The integumentary (i.e., skin) and gustatory systems both function to protect the human body and are a first point of contact with poisons and pathogens. These systems may share a similar protective mechanism because, as we show here, both human taste and skin cells express mRNA for bitter 'taste' receptors (TAS2Rs). We used gene-specific methods to measure mRNA from all known bitter receptor genes in adult human skin from freshly biopsied samples and from samples collected at autopsy from the Genotype-Tissue Expression project. Human skin expressed some but not all TAS2Rs, and for those that were expressed, the relative amounts differed markedly among individuals. For some TAS2Rs, mRNA abundance was related to presumed sun exposure based on the location from which the skin sample was collected (TAS2R14, TAS2R30, TAS2R42, and TAS2R60), sex (TAS2R3, TAS2R4, TAS2R8, TAS2R9, TAS2R14, and TAS2R60), and age (TAS2R5), although these effects were not large. These findings contribute to our understanding of extraoral expression of chemosensory receptors.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Female
  • Gene Expression Regulation / genetics
  • Genotype
  • HEK293 Cells
  • Humans
  • Integumentary System
  • Male
  • Middle Aged
  • RNA, Messenger / genetics
  • Receptors, Cell Surface / genetics*
  • Receptors, G-Protein-Coupled / genetics*
  • Skin / metabolism*
  • Taste / genetics*
  • Taste Buds / metabolism

Substances

  • RNA, Messenger
  • Receptors, Cell Surface
  • Receptors, G-Protein-Coupled
  • TAS2R8 protein, human
  • taste receptors, type 2