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Bansal D, Kulkarni J, Nadahalli K, Lakshmanan V, Krishna S, Sasidharan V, Geo J, Dilipkumar S, Pasricha R, Gulyani A, Raghavan S, Palakodeti D. Cytoplasmic poly (A)-binding protein critically regulates epidermal maintenance and turnover in the planarian Schmidtea mediterranea. Development 2017; 144:3066-3079. [PMID: 28807897 PMCID: PMC5611960 DOI: 10.1242/dev.152942] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 07/21/2017] [Indexed: 12/17/2022]
Abstract
Identifying key cellular events that facilitate stem cell function and tissue organization is crucial for understanding the process of regeneration. Planarians are powerful model system to study regeneration and stem cell (neoblast) function. Here, using planaria, we show that the initial events of regeneration, such as epithelialization and epidermal organization are critically regulated by a novel cytoplasmic poly A-binding protein, SMED-PABPC2. Knockdown of smed-pabpc2 leads to defects in epidermal lineage specification, disorganization of epidermis and ECM, and deregulated wound healing, resulting in the selective failure of neoblast proliferation near the wound region. Polysome profiling suggests that epidermal lineage transcripts, including zfp-1, are translationally regulated by SMED-PABPC2. Together, our results uncover a novel role for SMED-PABPC2 in the maintenance of epidermal and ECM integrity, critical for wound healing and subsequent processes for regeneration.
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Affiliation(s)
- Dhiru Bansal
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
- Manipal University, Manipal 576104, India
| | - Jahnavi Kulkarni
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
| | - Kavana Nadahalli
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
- Transdisciplinary University, Bangalore 560064, India
| | - Vairavan Lakshmanan
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
- Sastra University, Thanjavur 613402 India
| | - Srikar Krishna
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
- Sastra University, Thanjavur 613402 India
| | - Vidyanand Sasidharan
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
- Manipal University, Manipal 576104, India
| | - Jini Geo
- National Centre for Biological Sciences, GKVK PO, Bellary Road, Bangalore 560065, India
| | - Shilpa Dilipkumar
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
| | - Renu Pasricha
- National Centre for Biological Sciences, GKVK PO, Bellary Road, Bangalore 560065, India
| | - Akash Gulyani
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
| | - Srikala Raghavan
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
| | - Dasaradhi Palakodeti
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK PO, Bellary Road, Bangalore 560065, India
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