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S1P transporter SPNS2 regulates proper postnatal retinal morphogenesis.

Chao Fang1, Ganlan Bian1, Pan Ren2

  • 1Department of Neurobiology, Fourth Military Medical University, Xi'an, China.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|February 18, 2018
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Spinster homolog 2 (SPNS2) is crucial for retinal development. Its absence causes severe retinal disorganization by disrupting cell behavior and signaling pathways.

Keywords:
angiogenesisapical junctional complexcell cyclemigrationretinal progenitor cell

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Ophthalmology

Background:

  • Spinster homolog 2 (SPNS2) transports sphingosine-1-phosphate (S1P), influencing physiological processes.
  • The role of SPNS2 in the nervous system, particularly retinal development, is not well understood.

Purpose of the Study:

  • To investigate the function of SPNS2 in postnatal retinal morphogenesis using a spns2-deficient rat model.
  • To elucidate the mechanisms by which SPNS2 regulates retinal development and S1P signaling.

Main Methods:

  • Utilized a spns2-deficient rat model to study retinal development.
  • Analyzed retinal structure, cell behavior (polarity, cell-cycle exit, migration), and gene expression profiles of spns2 and S1P receptors (S1PRs).

Main Results:

  • Absence of functional SPNS2 led to progressive laminar disorganization in the developing retina.
  • Observed disrupted cell polarity, delayed cell-cycle exit of retinal progenitor cells, and impaired neuron migration.
  • SPNS2 regulates retinal morphogenesis by controlling ocular S1P levels and activating S1PR3 signaling.

Conclusions:

  • SPNS2 is essential for normal postnatal retinal morphogenesis.
  • SPNS2-mediated S1P transport and S1PR3 activation are critical for establishing retinal structure and function.