Functional Reconstitution of the Insulin-Secreting Porosome Complex in Live Cells.


Journal article


A. Naik, Sanjana Kulkarni, Kenneth T. Lewis, D. Taatjes, B. Jena
Endocrinology, 2016

Semantic Scholar DOI PubMed
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APA   Click to copy
Naik, A., Kulkarni, S., Lewis, K. T., Taatjes, D., & Jena, B. (2016). Functional Reconstitution of the Insulin-Secreting Porosome Complex in Live Cells. Endocrinology.


Chicago/Turabian   Click to copy
Naik, A., Sanjana Kulkarni, Kenneth T. Lewis, D. Taatjes, and B. Jena. “Functional Reconstitution of the Insulin-Secreting Porosome Complex in Live Cells.” Endocrinology (2016).


MLA   Click to copy
Naik, A., et al. “Functional Reconstitution of the Insulin-Secreting Porosome Complex in Live Cells.” Endocrinology, 2016.


BibTeX   Click to copy

@article{a2016a,
  title = {Functional Reconstitution of the Insulin-Secreting Porosome Complex in Live Cells.},
  year = {2016},
  journal = {Endocrinology},
  author = {Naik, A. and Kulkarni, Sanjana and Lewis, Kenneth T. and Taatjes, D. and Jena, B.}
}

Abstract

Supramolecular cup-shaped lipoprotein structures called porosomes embedded in the cell plasma membrane mediate fractional release of intravesicular contents from cells during secretion. The presence of porosomes, have been documented in many cell types including neurons, acinar cells of the exocrine pancreas, GH-secreting cells of the pituitary, and insulin-secreting pancreatic β-cells. Functional reconstitution of porosomes into artificial lipid membranes, have also been accomplished. Earlier studies on mouse insulin-secreting Min6 cells report 100-nm porosome complexes composed of nearly 30 proteins. In the current study, porosomes have been functionally reconstituted for the first time in live cells. Isolated Min6 porosomes reconstituted into live Min6 cells demonstrate augmented levels of porosome proteins and a consequent increase in the potency and efficacy of glucose-stimulated insulin release. Elevated glucose-stimulated insulin secretion 48 hours after reconstitution, reflects on the remarkable stability and viability of reconstituted porosomes, documenting the functional reconstitution of native porosomes in live cells. These results, establish a new paradigm in porosome-mediated insulin secretion in β-cells.





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