4.7 Article

Genome-Wide Identification and Expression Profiling of Wnt Family Genes in the Silkworm, Bombyx mori

Journal

Publisher

MDPI
DOI: 10.3390/ijms20051221

Keywords

Lepidoptera; silkworm; Wnt; expression profiling; gene cluster

Funding

  1. National Natural Science Foundation of China [31472153, 31830094]
  2. Hi-Tech Research and Development 863 Program of China [2013AA102507]
  3. Funds of China Agriculture Research System [CARS-18-ZJ0102]

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Wnt is a family of conserved glycoproteins that participate in a variety of important biological processes including embryo development, cell proliferation and differentiation, and tissue regeneration. The Wnt family is a metazoan novelty found in all animal phyla. Studies have revealed that the number of Wnt genes varies among species, presumably due to reproduction and loss of genes during evolution. However, a comprehensive inventory of Wnt genes in Lepidoptera is lacking. In this study, we identified the repertoire of Wnt genes in the silkworm and seven other species of Lepidoptera and obtained eight Wnt genes (Wnt1, Wnt5-Wnt7, Wnt9-Wnt11, and WntA) in each species. Four of these Wnt genes are clustered in two orientations (5-Wnt9-Wnt1-Wnt6-Wnt10-3 and 5-Wnt10-Wnt6-Wnt1-Wnt9-3) in both moths and butterflies. Transcript analysis of Wnt in silkworm embryonic stages showed that each BmWnt gene had a unique expression pattern during embryological development. Analysis of a larval stage revealed differential expression of Wnt family members in diverse tissues. Our study provides an overview of the Wnt family in Lepidoptera and will inspire further functional study of the Wnt genes in the silkworm.

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