Analysis of 13 cell types reveals evidence for the expression of numerous novel primate- and tissue-specific microRNAs

Author:

Londin Eric1,Loher Phillipe1,Telonis Aristeidis G.1,Quann Kevin1,Clark Peter1,Jing Yi1,Hatzimichael Eleftheria12,Kirino Yohei1,Honda Shozo1,Lally Michelle3,Ramratnam Bharat3,Comstock Clay E. S.4ORCID,Knudsen Karen E.5,Gomella Leonard5,Spaeth George L.6,Hark Lisa6,Katz L. Jay6,Witkiewicz Agnieszka7,Rostami Abdolmohamad8,Jimenez Sergio A.9,Hollingsworth Michael A.10,Yeh Jen Jen11,Shaw Chad A.12,McKenzie Steven E.13,Bray Paul13,Nelson Peter T.14,Zupo Simona15,Van Roosbroeck Katrien16,Keating Michael J.17,Calin George A.17,Yeo Charles18,Jimbo Masaya18,Cozzitorto Joseph18,Brody Jonathan R.18,Delgrosso Kathleen19,Mattick John S.2021,Fortina Paolo19,Rigoutsos Isidore1

Affiliation:

1. Computational Medicine Center, Sidney Kimmel Medical School at Thomas Jefferson University, Philadelphia, PA 19107;

2. Department of Hematology, University Hospital of Ioannina, Ioannina, GR-45500, Greece;

3. Department of Medicine, Rhode Island and Miriam Hospitals, Alpert Medical School of Brown University, Providence, RI 02912;

4. American Association of Cancer Research, Philadelphia, PA 19106;

5. Department of Urology, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107;

6. Glaucoma Service, Wills Eye Institute, Philadelphia, PA 19107;

7. Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX 75235;

8. Department of Neurology, Sidney Kimmel Medical School at Thomas Jefferson University, Philadelphia, PA 19107;

9. Jefferson Institute of Molecular Medicine and The Scleroderma Center, Sidney Kimmel Medical School at Thomas Jefferson University, Philadelphia, PA 19107;

10. Department of Biochemistry and Molecular Biology, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198;

11. Departments of Surgery and Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514;

12. Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030;

13. Cardeza Foundation for Hematologic Research, Division of Hematology, Department of Medicine, Sidney Kimmel Medical School at Thomas Jefferson University, Philadelphia, PA 19107;

14. Department of Pathology, Division of Neuropathology, Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40506;

15. Molecular Diagnostic Laboratory, Pathology Department, Istituto di Ricovero e Cura a Carattere Scientifico, Azienda Ospedaliera Universitaria San Martino IST, Genoa, Italy;

16. Department of Experimental Therapeutics, University of Texas MD Anderson Cancer Center, Houston, TX 77030;

17. Leukemia Department, University of Texas MD Anderson Cancer Center, Houston, TX 77030;

18. Department of Surgery, Biliary and Related Cancer Center, Thomas Jefferson University, Philadelphia PA 19107;

19. Cancer Genomics Laboratory, Department of Cancer Biology, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107;

20. Garvan Institute of Medical Research, Sydney NSW 2010, Australia; and

21. St. Vincent's Clinical School and School of Biotechnology & Biomolecular Sciences, University of New South Wales, Sydney NSW 2052, Australia

Abstract

Significance MicroRNAs (miRNAs) are small ∼22-nt RNAs that are important regulators of posttranscriptional gene expression. Since their initial discovery, they have been shown to be involved in many cellular processes, and their misexpression is associated with disease etiology. Currently, nearly 2,800 human miRNAs are annotated in public repositories. A key question in miRNA research is how many miRNAs are harbored by the human genome. To answer this question, we examined 1,323 short RNA sequence samples and identified 3,707 novel miRNAs, many of which are human-specific and tissue-specific. Our findings suggest that the human genome expresses a greater number of miRNAs than has previously been appreciated and that many more miRNA molecules may play key roles in disease etiology.

Publisher

Proceedings of the National Academy of Sciences

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