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Comprehensive analysis of lncRNAs modified by m6A methylation in sheep skin

Comprehensive analysis of lncRNAs modified by m6 A methylation in sheep skin

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Objective: N6-methyladenosine (m<sup>6</sup>A) is the most prevalent methylation of mRNA and plays crucial roles in various physiological processes, including pigmentation. Yet, the regulatory mechanisms, including long noncoding RNAs (lncRNAs) m<sup>6</sup>A methylation contributing to pigmentation in sheep skin remains unclear. The purpose of this study was to identify potential lncRNAs and the m<sup>6</sup>A methylation of lncRNAs associated with pigmentation.Methods: RNA-seq and MeRIP-seq were performed to study the expression of lncRNAs and the m<sup>6</sup>A methylation of lncRNAs in black and white sheep skin. Furthermore, quantitative real-time polymerase chain reaction (qRT-PCR) was used to verify the consistency with the RNA-seq and MeRIP-seq data.Results: We identified 168 differentially expressed lncRNAs between the two sheep skin colors. The differentially expressed lncRNAs enriched in the pathway of ECM-receptor interaction, Rap1 signaling pathway, and Non-homologous end-joining may play essential roles in pigmentation. We identified 577 m<sup>6</sup>A peaks and 617 m<sup>6</sup>A peaks in black and white sheep skin, respectively, among which 20 m<sup>6</sup>A peaks showed significant differences. The enriched motif in sheep skin was “GGACU”, which aligned with the consensus motif “RRACH” (R = A or G, H = A, C or U). Differently methylated lncRNAs enriched in PI3K-Akt signaling pathway and Wnt signaling pathway might participate in skin pigmentation. ENSOARG00020015168 was the unique lncRNA with high expression and methylation (Hyper-Up) in black sheep shin. A lncRNA-mRNA network was constructed, with pigmentation-related genes, such as <i>PSEN2</i>, <i>CCND3</i>, <i>COL2A1</i>, and <i>ERCC3</i>.Conclusion: The m<sup>6</sup>A modifications of lncRNAs in black and white colored sheep skin were analyzed comprehensively, providing new candidates for the regulation of pigmentation.

Abstract

Objective: N6-methyladenosine (m6 A) is the most prevalent methylation of mRNA and plays crucial roles in various physiological processes, including pigmentation. Yet, the regulatory mechanisms, including long noncoding RNAs (lncRNAs) m6 A methylation contributing to pigmentation in sheep skin remains unclear. The purpose of this study was to identify potential lncRNAs and the m6 A methylation of lncRNAs associated with pigmentation. Methods: RNA-seq and MeRIP-seq were performed to study the expression of lncRNAs and the m6 A methylation of lncRNAs in black and white sheep skin. Furthermore, quantitative real-time polymerase chain reaction (qRT-PCR) was used to verify the consistency with the RNA-seq and MeRIP-seq data. Results: We identified 168 differentially expressed lncRNAs between the two sheep skin colors. The differentially expressed lncRNAs enriched in the pathway of ECM-receptor interaction, Rap1 signaling pathway, and Non-homologous end-joining may play essential roles in pigmentation. We identified 577 m6 A peaks and 617 m6 A peaks in black and white sheep skin, respectively, among which 20 m6 A peaks showed significant differences. The enriched motif in sheep skin was “GGACU”, which aligned with the consensus motif “RRACH” (R = A or G, H = A, C or U). Differently methylated lncRNAs enriched in PI3K-Akt signaling pathway and Wnt signaling pathway might participate in skin pigmentation. ENSOARG00020015168 was the unique lncRNA with high expression and methylation (Hyper-Up) in black sheep shin. A lncRNA-mRNA network was constructed, with pigmentation-related genes, such as PSEN2, CCND3, COL2A1, and ERCC3. Conclusion: The m6 A modifications of lncRNAs in black and white colored sheep skin were analyzed comprehensively, providing new candidates for the regulation of pigmentation.

참고문헌 (47)

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