Hereditary leukonychia, or porcelain nails, resulting from mutations in PLCD1

Maija Ht Kiuru, Mazen Kurban, Munenari Itoh, Lynn Petukhova, Yutaka Shimomura, Muhammad Wajid, Angela M. Christiano

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Hereditary leukonychia (porcelain nails or white nails) is a rare nail disorder with an unknown genetic basis. To identify variants in a gene underlying this phenotype, we identified four families of Pakistani origin showing features of hereditary leukonychia. All 20 nails of each affected individual were chalky and white in appearance, consistent with total leukonychia, with no other cutaneous, appendageal, or systemic findings. By using Affymetrix 10K chip, we established linkage to chromosome 3p21.3-p22 with a LOD score (Z) of 5.1. We identified pathogenic mutations in PLCD1 in all four families, which encodes phosphoinositide-specific phospholipase C delta 1 subunit, a key enzyme in phosphoinositide metabolism. We then identified localization of PLCD1 in the nail matrix. It was recently shown that PLCD1 is a component of the human nail plate by proteomic analysis and is localized in the matrix of human nails. Furthermore, mutations detected in PLCD1 resulted in reduced enzymatic activity in vitro. Our data show that mutations in PLCD1 underlie hereditary leukonychia, revealing a gene involved in molecular control of nail growth.

Original languageEnglish (US)
Pages (from-to)839-844
Number of pages6
JournalAmerican Journal of Human Genetics
Issue number6
StatePublished - Jun 10 2011
Externally publishedYes

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)


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