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Evaluation of SCD and FASN Gene Expression in Baluchi, Iran-Black, and Arman Sheep.

ABSTRACT: BACKGROUND:With the increasing concern for health and nutrition, dietary fat has attracted considerable attention. The composition of fatty acids in the diet is important because they are associated with major diseases including cancers, diabetes, and cardiovascular disease. The fatty acid synthase (FASN) and stearoyl-CoA desaturase (delta-9-desaturase) (SCD) genes affect fatty acid composition (1). The expression of SCD and FASN genes is related to an increase in conjugated linoleic acid (CLA) in dairy products, which benefits human health.The aim of current study was to investigate expression changes of SCD and FASN genes that resulted from crossbreeding the local Baluchi sheep with alien breeds. METHODS:We collected tissue samples from the mammary glands of 24 single-born ewes from local Baluchi and synthetic Iran-Black and Arman sheep breeds in the Abbas Abad breeding center. After RNA extraction and cDNA synthesis, real-time PCR was performed with all samples in triplicate. RESULTS:The maximum and minimum expression of SCD and FASN genes was in the local Baluchi sheep and the crossbred Arman sheep, respectively. CONCLUSION:With the highest SCD and FASN gene expression in local Baluchi sheep and relatively less expression of these genes in synthetic Iran-Black and Arman Sheep breeds, it may be necessary to consider the consequences of crossbreeding local sheep and the fatty acid composition of their dairy products.

SUBMITTER: Salmani Izadi M

PROVIDER: S-EPMC5214681 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature

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Evaluation of SCD and FASN Gene Expression in Baluchi, Iran-Black, and Arman Sheep.

Salmani Izadi Mohammad M Naserian Abbas Ali AA Nasiri Mohammad Reza MR Majidzadeh Heravi Reza R Valizadeh Reza R

Reports of biochemistry & molecular biology 20161001 1

<h4>Background</h4>With the increasing concern for health and nutrition, dietary fat has attracted considerable attention. The composition of fatty acids in the diet is important because they are associated with major diseases including cancers, diabetes, and cardiovascular disease. The fatty acid synthase (FASN) and stearoyl-CoA desaturase (delta-9-desaturase) (SCD) genes affect fatty acid composition (1). The expression of SCD and FASN genes is related to an increase in conjugated linoleic aci ...[more]

PMID: 28070532

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Project description:Background:Black bone sheep was first discovered in Yunnan province of China in 1970, with unique black pigmentation on the body and internal organs. Endothelin 3 (EDN3) has been known as a key gene causing hyperpigmentation in black bone chicken, the Silky fowl. Methods:In this study, EDN3 was employed as a candidate gene for regulating black color pigmentation. First, EDN3 was cloned from sheep to obtain the full-length cDNA by using the rapid amplification of cDNA ends (RACE). Genomic EDN3 was screened and a total of thirty predicted single nucleotide polymorphisms (SNPs) were genotyped for allele and genotype frequency analysis in a case-control study involving two black bone sheep populations. Genomic copy number analysis of EDN3 in sheep was conducted to measure the variation in copy number. EDN3 expression levels were observed among the groups in adult liver, lymph node, and kidney tissues, as well as embryo kidney samples. Also, among the tissues of black bone and non-black bone sheep. Results:The size of the full-length cDNA was 1,578 bp, which included 426 bp of 5'-untranslated region (5'-UTR), an open reading frame (ORF) of 639 bp encoding a protein of 212 amino acids, and a 3'-UTR of 513 bp. Genotype and allele frequencies of all the discovered SNPs were found insignificantly different in black bone and non-black bone sheep (P?>?0.05). Genomic copy number analysis of EDN3 in sheep revealed no significant difference between the two sheep groups. No significant variations were found in the adult liver and kidney embryo samples. However, the expression in lymph node and kidney tissue was significantly higher in black bone sheep than that in non-black bone sheep (P?<?0.05). Significant variations in the EDN3 expression levels were observed among the tissues of non-black bone sheep. Conclusions:The findings of the present study indicate that unlike in Silky chickens, EDN3 is not responsible for hyperpigmentation but may play a key functional role in immune and excretory systems of black bone sheep.

Dataset Information

Evaluation of SCD and FASN Gene Expression in Baluchi, Iran-Black, and Arman Sheep.

Publications

Evaluation of SCD and FASN Gene Expression in Baluchi, Iran-Black, and Arman Sheep.

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