This page provides data supporting the zebrafish tissue long noncoding RNAs (lncRNAs) discovered by Kaushik et al.
Kaushik K, Leonard VE, Shamsudheen KV, Lalwani MK, Jalali S, Patowary A, Joshi A, Scaria V, Sivasubbu S.
PLoS One. 2013 Dec 31;8(12):e83616. doi: 10.1371/journal.pone.0083616.
Long non-coding RNAs (lncRNA) represent an assorted class of transcripts having little or no protein coding capacity and have recently gained importance for their function as regulators of gene expression. Molecular studies on lncRNA have uncovered multifaceted interactions with protein coding genes. It has been suggested that lncRNAs are an additional layer of regulatory switches involved in gene regulation during development and disease. LncRNAs expressing in specific tissues or cell types during adult stages can have potential roles in form, function, maintenance and repair of tissues and organs. We used RNA sequencing followed by computational analysis to identify tissue restricted lncRNA transcript signatures from five different tissues of adult zebrafish. The present study reports 442 predicted lncRNA transcripts from adult zebrafish tissues out of which 419 were novel lncRNA transcripts. Of these, 77 lncRNAs show predominant tissue restricted expression across the five major tissues investigated. Adult zebrafish brain expressed the largest number of tissue restricted lncRNA transcripts followed by cardiovascular tissue. We also validated the tissue restricted expression of a subset of lncRNAs using independent methods. Our data constitute a useful genomic resource towards understanding the expression of lncRNAs in various tissues in adult zebrafish. Our study is thus a starting point and opens a way towards discovering new molecular interactions of gene expression within the specific adult tissues in the context of maintenance of organ form and function.
Whole mount in situ hybridization of lncRNA transcripts. Shown are images with probes specific to the two indicated brain restricted lncRNAs. Arrow heads indicate the expression domains. A and B Anatomical cartoons of 24 hpf developing zebrafish embryo and adult zebrafish brain. C and D Expression of lncRNA transcriptlncBrHM_035. (C) Dorsal view (anterior up) and lateral view (anterior to the left) showing expression in mid-hind brain boundary and hind brain of 24hpf zebrafish embryos. (D) Dorsal view (anterior up) of the adult zebrafish brain showing expression in regions of cerebellar crest (CC). E and F Expression of lncRNA transcript lncBrM_002. (E) Dorsal view (anterior up) and lateral view (anterior to the left) showing expression in fore-brain (FB), mid-hind brain boundary (MHB) and hind brain (HB) of 24hpf zebrafish embryos. (F) Dorsal view (anterior up) of the adult zebrafish brain showing expression in the regions of CC and a localized signal in eminentia granularis (EG). MB, mid brain; OB, olfactory bulb; Tel, telencephalon; Ha, habenula; Teo, optic tectum; MO, medulla oblongata.