Distinct tissue expression profiles of chicken Lpin1-α/β isoforms and the effect of the variation on muscle fiber traits.

Here we cloned chicken Lpin1-β, conducted the temporal and spatial expression pattern analysis of chicken Lpin1 isoforms by real-time PCR, and studied the 5' flanking region variation and the potential effect. It was found that chicken Lpin1-α and Lpin1-β exhibited distinct tissue expression profiling, with prominent expression in the ovary and muscle tissues respectively. Chicken Lpin1 presented a tissue-specific temporal expression pattern in postnatal development (0-16 weeks). Energy restriction significantly elevated the mRNA level of total Lpin1 by increasing the expression of Lpin1-α and Lpin1-β in a nearly same magnitude. Eight variants/four haplotypes among six breeds were detected from the 5' flanking region of chicken Lpin1, one multiple-nucleotide length polymorphism (g.258M>N) was found and predicted causing the change of 31 transcription factor binding sites including MyoD et al. Both g.258M>N and g. 65C>T variants showed significant association with muscle fiber traits, which suggested one novel role of Lpin1 on muscle fiber development.
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