Abstract：
:Glaucoma is a common optic neuropathy characterized by retinal ganglion cell death. Elevated intraocular pressure (IOP), a key risk factor for glaucoma, leads to significant biomechanical deformation of optic nerve head (ONH) cells and tissues. ONH astrocytes respond to this deformation by transforming to a reactive, proliferative phenotype, which has been implicated in the progression of glaucomatous vision loss. However, little is known about the mechanisms of this transformation. In this study, we developed a 3D collagen gel culture system to mimic features of ONH deformation due to elevated IOP. Compressive loading of astrocyte-seeded collagen gels led to cell alignment perpendicular to the direction of strain, and increased astrocyte activation, as assayed by GFAP, vimentin, and s100β levels, as well as MMP activity. This proof-of-concept study shows that this system has potential for studying mechanisms of astrocyte mechanobiology as related to the pathogenesis of glaucoma. Further work is needed to establish the possible interplay of mechanical stimulation, matrix properties, and hypoxia on the observed response of astrocytes.
journal_name
Ann Biomed Engjournal_title
Annals of biomedical engineeringauthors
Mulvihill JJE,Raykin J,Snider EJ,Schildmeyer LA,Zaman I,Platt MO,Kelly DJ,Ethier CRdoi
10.1007/s10439-017-1967-5subject
Has Abstractpub_date
2018-02-01 00:00:00pages
365-374issue
2eissn
0090-6964issn
1573-9686pii
10.1007/s10439-017-1967-5journal_volume
46pub_type
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