Ravindra N Singh
Professor and Salsbury Chair
2034 Vet Med
Singh group works on the interface of fundamental and translational biology. General interest of his group has been to understand the mechanism of alternative splicing, a vital process that increases the coding potential of genome in all higher eukaryotes. Alternative splicing is also associated with a growing number of diseases including neurological and neuromuscular disorders, cardiovascular disorders and cancer. Particular focus of his group has been to understand the molecular basis of Spinal Muscular Atrophy (SMA), a debilitating genetic disease of infants and children. His award-winning discovery relates to finding a unique regulatory element located within the non-coding region (or intron) of Survival Motor Neuron (SMN) gene. He has termed this novel regulatory element as “Intronic Splicing Silencer N1”, which is abbreviated as “ISS-N1” (US patent # 7,838,657). ISIS Pharmaceuticals has recently launched phase 2 clinical trial of ISS-N1-targeting drug ISIS-SMNRX. If successful, this will be the first antisense drug to restore a full-length functional protein in a human disease.
Singh group continues to develop additional targets and antisense formulations for an efficient correction of aberrant splicing in SMA (see news links below). In a paradigm shifting discovery, Singh lab has recently reported a unique RNA structure formed by a deep intronic sequence as a regulator of SMA gene splicing. This discovery provides lead for developing yet another oligonucleotide-based therapy of SMA.
In addition to above accomplishments, Singh lab has made seminal contribution towards a better understanding of role of RNA binding proteins in regulation of splicing of SMN2 exon 7, skipping of which is intimately linked to SMA pathogenesis. His discoveries are relevant for uncovering the novel mechanisms of genome-wide regulation of alternative splicing in normal and pathological conditions. His other interests include RNA-protein interactions and isolation of RNA aptamers as detection and diagnostic tools.
Current funding source: National Institutes of Health (NIH) and Salsbury Endowment
News Links about Dr. Ravindra Singh:
- Iowa State researchers explore new treatments for a leading genetic cause of infants death
- Discovery of small antisense target for possible treatment of SMA
- Presidential early career award for scientists and Engineers (PECASE) from The White House
Instructor in charge of BMS 575 (Cellular and Molecular Biology)
B. Sc.: Banaras Hindu University, India 1983
M. Sc.: Banaras Hindu University, India 1985
Ph.D.: Russian Academy of Sciences, Russia, 1993.
Singh NN, Lawler MN, Ottesen EW, Upreti D, Kaczynski JR and Singh RN (2013) An intronic structure enabled by a long-distance interaction serves as a novel target for splicing correction in spinal muscular atrophy. Nucleic Acids Research, published online July 16, 2013. PubMed, Pdf
Sivanesan S, Howell MD, DiDonato CJ and Singh RN (2013) Antisense oligonucleotide mediated therapy of spinal muscular atrophy. Translational Neuroscience, 4, 1-7. Post-print pdf
Singh NN, Joonbae Seo, Sarah J Rahn and Singh RN (2012) A multi-exon-skipping detection assay reveals surprising diversity of splice isoforms of spinal muscular atrophy genes. PLOS ONE, 7, e49595. PubMed, Pdf
Singh NN, Seo J, Ottesen EW, Shshimorova M, Bhattacharya D and Singh RN (2011) TIA1 prevents skipping of a critical exon associated with spinal muscular atrophy. Molecular and Cellular Biology, 31, 935-954. PubMed, pdf
Singh NN, Hollinger K, Bhattacharya D and Singh RN (2010) Antisense microwalk reveals critical role of an intronic position linked to a unique long-distance interaction in pre-mRNA splicing. RNA, 16, 1167-1181. PubMed, pdf
Singh NN, Shishimorova M, Cao LC, Gangwani L and Singh RN (2009) A short antisense oligonucleotide masking a unique intronic motif prevents skipping of a critical exon in spinal muscular atrophy. RNA Biology, 6, 341-350. PubMed, pdf
Papp LV, Wang J, Kennedy D, Boucher D, Zhang Y, Gladyshev VN, Singh RN and Khanna KK (2008) Functional characterization of alternatively spliced human SECISBP2 transcript variants. Nucleic Acids Research, 36, 7192-206. PubMed, pdf
Singh NK, Singh NN, Androphy EJ and Singh RN (2006) Splicing of a Critical Exon of Survival Motor Neuron genes is regulated by a human-specific silencer element located in the last intron. Molecular and Cellular Biology, 26, 1333-1346. PubMed, pdf
Singh NN, Androphy EJ and Singh RN (2004) In vivo selection reveals features of combinatorial control that defines a critical exon in the spinal muscular atrophy genes. RNA, 10, 1291-1305. PubMed, pdf
Singh NN, Androphy EJ and Singh RN (2004) Regulation and regulatory activities of alternative splicing of the SMN genes. Critical Reviews in Eukaryotic Gene Expression, 14, 271-285. PubMed
Singh NN, Androphy EJ and Singh RN. (2004) An extended inhibitory context causes skipping of exon 7 of SMN2 in spinal muscular atrophy. Biochemical and Biophysical Research Communications, 315, 381-388. PubMed
Singh RN, Saldanha R, D’Souza LM and Lambowitz AM (2002) Binding of a group II intron-encoded reverse transcriptase/maturase to its high affinity intron RNA binding site involves sequence-specific recognition and autoregulates translation. Journal of Molecular Biology, 318, 287-303. PubMed
Wank H, SanFilippo J, Singh RN, Matsuuara M and Lambowitz AM (1999) A reverse transcriptase/maturase promotes RNA splicing by binding at its own coding segment in a group II intron. Molecular Cell, 4. 239-250. PubMed
Singh RN and Dreher TW (1998) Specific site selection in RNA resulting from a combination of nonspecific secondary structure and -CCR- boxes: initiation of minus strand synthesis by turnip yellow mosaic virus RNA-dependent RNA polymerase. RNA, 4, 1083-1095. PubMed
- Organizing committee member, 2010 RNA in Motion Symposium, Ames IA, USA.
- Organizing committee member, 2010 One Health Symposium, Ames IA, USA.
- Active member of George Washington Carver internship program for disadvantaged students. Website
- Managing Editor of “Frontiers of Biosciences.”
- Reviewed for many granting agencies including NIH, US Department of Defense, Alzheimer's association, Italian Telethon Grants, Consiglio Nazionale delle Ricerche (CNR) Italy, Scottish Hospital Endowments Research Trust Grants, Medical Research Council (MRC) UK, National Medical Research Council (NMRC) Singapore, and US-Israel Binational Science Foundation.
- Reviewed for many journals including Annals of Human Genetics, Biochimica et Biophysica Acta, Clinica Chimica Acta, Current Molecular Medicine, Drug News & Perspectives, Expert Opinion in Drug discovery, FEBS Letters, Human Molecular Genetics, Human Genetics, Journal of Molecular Medicine, Journal of Cell Biology, Journal of Molecular Biology, Medical Science Monitor, Nature series journals, Neurology India, Nucleic Acids Research, PLoS series journals, Proceedings of National Academy of Sciences (USA), Trends in Molecular Medicine.
2006 Presidential Early Career Award for Scientists and Engineers (PECASE) (The highest civilian award given to young US scientists) Website
Named Endowed Dr. John G. and Mrs. Doris Salsbury Chair (Since 2008)
Permanent member of NIH CDIN study section (2008-2012)
American Society for Microbiology
The Genetics Society of America
The RNA Society
Society for Neuroscience
American Society for advancement of Science
American Society for Cell Biology
Oligonucleotide Therapeutic Society
Osborne Club, Iowa State University
Summer Scholar Projects:
Summer scholars (undergraduate and veterinary students) selected through various internship programs would learn one or more of the following techniques:
1. Blast analysis of alternative splicing of different genes using public data base
2. Isolation and processing of RNA from pathological samples (human and animal samples)
3. Design and perform PCR experiments to amplify alternatively spliced transcripts
4. Run agarose and polyacrylamide gel electrophoresis
5. Perform tissue culture experiments
6. Perform gene silencing experiments
7. Perform cloning and expression experiments
8. Perform protein isolation and purification
9. Perform immunological tests
10. Write and present scientific report
Postdoctoral position is open in Singh Lab
A post-doctoral position is available in Singh Lab for a motivated and talented fresh graduate with experience in Neuroscience. This position is ideally suited for a candidate who is primarily trained in generating mouse models (knockout and/or knock in) to examine the effect on neurodegeneration through behavioral, immunohistochemical and immunocytochemical techniques. Candidate should also have experience of a combination of other techniques: DNA cloning, in vitro assays, RNA isolation, RT-PCR, Real-time PCR, Northern blot and all types of Electrophoresis, western blot, immuno-affinity pull downs.
Interested applicant should send full CV and names of three references to: firstname.lastname@example.org