Transcript variants and expression profiles analysis of Mitf gene in minipigs

Area of Science:

• Molecular Biology
• Genetics
• Comparative Genomics

Background:

• The Microphthalmia-associated transcription factor (Mitf) is crucial for melanocyte development and is highly conserved across species.
• Understanding variations in Mitf gene structure and expression is vital for comparative studies and potential therapeutic targets.

Purpose of the Study:

• To identify and characterize transcript variants of the porcine Mitf gene.
• To analyze the expression patterns of porcine Mitf across various tissues.

Main Methods:

• Porcine Mitf gene structure was deduced using pairwise BLAST searches against the NCBI database.
• Transcript variants were analyzed using 5' rapid amplification of cDNA ends (RACE).
• Gene expression levels were quantified using fluorescent quantitative reverse transcription polymerase chain reaction (RT-PCR).

Main Results:

• Four distinct transcript variants of porcine Mitf were identified: MITF-A, MITF-H, MITF-M, and MITF-SUS.
• These variants exhibited significant sequence homology to their human counterparts, with the exception of Mitf-SUS.
• Expression patterns of these variants were successfully analyzed in different porcine tissues.

Conclusions:

• The porcine Mitf gene sequence is highly homologous to human MITF.
• Fewer transcript variants (four) were identified in the studied minipigs compared to humans (nine).
• These findings provide a foundation for further research into Mitf function and regulation in pigs.