Integrated analysis of the DNA methylome and RNA transcriptome during the development of skeletal muscle in Duroc pigs.

Background: Skeletal muscle development plays a crucial role in yield and quality of pork; however, this process is influenced by various factors. In this study, we employed whole-genome bisulfite sequencing (WGBS) and transcriptome sequencing to comprehensively investigate the longissimus dorsi muscle (LDM), aiming to identify key genes that impact the growth and development of Duroc pigs with different average daily gains (ADGs).

Results: Eight pigs were selected and divided into two groups based on ADGs: H (774.

Pangenome obtained by long-read sequencing of 11 genomes reveal hidden functional structural variants in pigs.

Long-read sequencing (LRS) facilitates both the genome assembly and the discovery of structural variants (SVs). Here, we built a graph-based pig pangenome by incorporating 11 LRS genomes with an average of 94.01% BUSCO completeness score, revealing 206-Mb novel sequences.

Characteristics of circRNAs expression profiles in the piglets intestine induced by oxidative stress.

Backgroud: Oxidative stress (OS) can affect the expression of key genes and destroy the intestinal structure. However, it is unclear how OS regulates the expression of circular RNAs (circRNAs), microRNAs (miRNAs) and mRNAs.

Objective: The aim of this study was to examine the expression of circRNAs, miRNAs and mRNAs exposed to OS.

circGLI3 Inhibits Oxidative Stress by Regulating the miR-339-5p/VEGFA Axis in IPEC-J2 Cells.

As a new type of noncoding RNA, circular RNA (circRNA) is stable in cells and not easily degraded. This type of RNA can also competitively bind miRNAs to regulate the expression of their target genes. The role of circRNA in the mechanism of intestinal oxidative stress (OS) in weaned piglets is still unclear.

Diquat Determines a Deregulation of lncRNA and mRNA Expression in the Liver of Postweaned Piglets.

Oxidative stress is detrimental to animals and can depress the growth performance and regulate the gene expression of animals. However, it remains unclear how oxidative stress regulates the expression of long noncoding RNAs (lncRNAs) and mRNAs. Therefore, the purpose of this article was to explore the profiles of lncRNAs and mRNAs in the liver of piglets under oxidative stress.

Analysis and preliminary validation of the molecular mechanism of fat deposition in fatty and lean pigs by high-throughput sequencing.

Fat deposition in muscle includes intramuscular fat (IMF) and intermuscular fat. IMF content is an index of pork quality; however, because IMF content is difficult to measure in vivo in young animals, conventional breeding for IMF content is difficult to carry out. The mechanism and progression of animal fat deposition is not well understood, and there are currently no effective control methods.

Relationships between ultimate pH and antioxidant enzyme activities and gene expression in pork loins.

Ultimate pH (pH ) is a major determinant factor of meat quality. In this study, we investigated the effects of pH on the muscle antioxidant capacity, and the relationship between pH and muscle antioxidant capacity of pigs. A total of 137 pigs from three pig breeds with the same feeding condition were slaughtered and used to measure the pH , superoxide dismutase (SOD), glutathione peroxidase (GSH-PX), total antioxidant capacity (T-AOC), and malondialdehyde (MDA) content, and gene expression of SOD1 and GPX4.

miRNA-29a targets COL3A1 to regulate the level of type III collagen in pig.

COL3A1 encodes the protein, collagen type III alpha 1, which is an important component of collagen. Collagen can have a considerable effect on the processing quality of meat, and is nutritious. Bioinformatic analysis using Targetscan showed that COL3A1 could be a target gene of miRNA-29a.

Molecular cloning, sequence characteristics, and tissue expression analysis of ECE1 gene in Tibetan pig.

Low air pressure and low oxygen partial pressure at high altitude seriously affect the survival and development of human beings and animals. ECE1 is a recently discovered gene that is involved in anti-hypoxia, but the full-length cDNA sequence has not been obtained. For a better understanding of the structure and function of the ECE1 gene and to study its effect in Tibetan pig, the cDNA of the ECE1 gene from the muscle of Tibetan pig was cloned, sequenced and characterized.

Analysis on differential expressed genes of ovarian tissue between high- and low-yield laying hen.

In order to elucidate molecular genetic mechanism of laying hen reproduction at the transcriptional level and the structure of significantly differential genes, the mRNA differential display and reverse northern dot-blot were used to detect the differential expression of genes in the ovary tissue of low-yield laying hens and high-yield laying hens in the present study. Sixteen 32-week-old CAU-pink laying hens divided into two groups were used and the laying performance was measured. The results showed that only the egg numbers were significantly different between the two groups; and from 15 primer pairs, a total of 336 bands were displayed of which 59 cDNA bands were found to be differentially expressed in both high-yield and low-yield laying hen.

Molecular cloning, characterization and expression of cathepsin D from grass carp (Ctenopharyngodon idella).

Cathepsin D is a lysosomal aspartic proteinase which participates in various degradation functions within the cell. In this current study, we cloned and characterized the complete cDNA of grass carp cathepsin D through 5'- and 3'-RACE. The cathepsin D contained a 56 bp 5' terminal untranslated region (5'-UTR), a 1197 bp open reading frame encoding 398 amino acids, and a 394 bp 3'-UTR.

Comparative Analysis on Antioxidative Ability of Muscle between Laiwu Pig and Large White.

This study was conducted to evaluate effects of storage temperatures (4°C and 20°C) and pig breeds (Laiwu pig and Large White pig) on the main antioxidative enzymes (superoxide dismutase, catalase, and glutathione peroxidase) activity and lipid oxidation in porcine Longissimus dorsi muscle. Activities of antioxidative enzymes (AOE) decreased slightly during storage, regardless of storage temperatures. Muscle antioxidative enzymes activities stored at 4°C were higher than that stored at 20°C.

[Cloning, expression and functional analysis of CuZnSOD gene in swine.].

In order to understand the structure and function of CuZnSOD gene, reveal the effect of the anti-oxidant in swine, and find the molecule marker correlated with meat traits, the cDNA of CuZnSOD gene was cloned and sequenced from muscle of Laiwu black swine by RACE (rapid amplification of cDNA end) techniques. The structure and function of CuZnSOD were analyzed by bioinformatics, and the gene expression profile in different tissues was examined by real-time PCR. The results showed that the full sequence of CuZnSOD cDNA is 658 bp (GU944822), containing 76 bp sequence of 5' UTR and 120 bp sequence of 3' UTR, and coding region (CDS, 462 bp) encodes 153 amino acids.

[Relationship of genetic polymorphism of PRLR and RBP4 genes with litter size traits in pig].

The polymorphism of prolactin receptor (PRLR) and retinol-binding protein 4 (RBP4) genes was detected by PCR-RFLP method, and the effects of PRLR and RBP4 genes on litter size traits in pig were analyzed by the least square analysis. Data of total number born (TNB) and number born alive (NBA) from 323 sows, including five Shandong local pig breeds and three foreign pig breeds, were collected. The results showed that the polymorphic sites of both PRLR and RBP4 genes were found in all populations tested.