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Mesenchymal stem cell secretome protects against oxidative stress-induced ocular blast visual pathologies.
Jha, Kumar Abhiram; Rasiah, Pratheepa Kumari; Gentry, Jordy; Del Mar, Nobel A; Kumar, Ravi; Adebiyi, Adebowale; Reiner, Anton; Gangaraju, Rajashekhar.
Afiliación
  • Jha KA; Department of Ophthalmology, University of Tennessee Health Science Center, 930 Madison Ave, Suite 769, Memphis, TN, 38163, USA. Electronic address: jha82a@gmail.com.
  • Rasiah PK; Department of Ophthalmology, University of Tennessee Health Science Center, 930 Madison Ave, Suite 769, Memphis, TN, 38163, USA. Electronic address: prasiah@uthsc.edu.
  • Gentry J; Department of Ophthalmology, University of Tennessee Health Science Center, 930 Madison Ave, Suite 769, Memphis, TN, 38163, USA. Electronic address: jgentr21@uthsc.edu.
  • Del Mar NA; Department of Anatomy & Neurobiology, University of Tennessee Health Science Center, 317 Wittenborg Building, 875 Monroe Avenue, Memphis, TN, 38163, USA. Electronic address: ndelmar@uthsc.edu.
  • Kumar R; Department of Physiology, University of Tennessee Health Science Center, 956 Court Avenue, Coleman Building, Suite C211, Memphis, TN, 38163, USA. Electronic address: fravikum@uthsc.edu.
  • Adebiyi A; Department of Physiology, University of Tennessee Health Science Center, 956 Court Avenue, Coleman Building, Suite C211, Memphis, TN, 38163, USA. Electronic address: aadebiyi@uthsc.edu.
  • Reiner A; Department of Anatomy & Neurobiology, University of Tennessee Health Science Center, 522 Wittenborg Building, 875 Monroe Avenue, Memphis, TN, 38163, USA. Electronic address: areiner@uthsc.edu.
  • Gangaraju R; Department of Ophthalmology, Anatomy & Neurobiology, Neuroscience Institute, University of Tennessee Health Science Center, 930 Madison Ave, Suite 768, Memphis, TN, 38163, USA. Electronic address: sgangara@uthsc.edu.
Exp Eye Res ; 215: 108930, 2022 02.
Article en En | MEDLINE | ID: mdl-35016886
Visual deficits are a common concern among subjects with head trauma. Stem cell therapies have gained recent attention in treating visual deficits following head trauma. Previously, we have shown that adipose-derived stem cell (ASC) concentrated conditioned medium (ASC-CCM), when delivered via an intravitreal route, yielded a significant improvement in vision accompanied by a decrease in retinal neuroinflammation in a focal cranial blast model that indirectly injures the retina. The purpose of the current study is to extend our previous studies to a direct ocular blast injury model to further establish the preclinical efficacy of ASC-CCM. Adult C57BL/6J mice were subjected to repetitive ocular blast injury (rOBI) of 25 psi to the left eye, followed by intravitreal delivery of ASC-CCM (∼200 ng protein/2 µl) or saline within 2-3 h. Visual function and histological changes were measured 4 weeks after injury and treatment. In vitro, Müller cells were used to evaluate the antioxidant effect of ASC-CCM. Visual acuity, contrast sensitivity, and b-wave amplitudes in rOBI mice receiving saline were significantly decreased compared with age-matched sham blast mice. Immunohistological analyses demonstrated a significant increase in glial fibrillary acidic protein (a retinal injury marker) in Müller cell processes, DNA/RNA damage, and nitrotyrosine (indicative of oxidative stress) in the retina, while qPCR analysis revealed a >2-fold increase in pro-inflammatory cytokines (TNF-α, ICAM1, and Ccl2) in the retina, as well as markers for microglia/macrophage activation (IL-1ß and CD86). Remarkably, rOBI mice that received ASC-CCM demonstrated a significant improvement in visual function compared to saline-treated rOBI mice, with visual acuity, contrast sensitivity, and b-wave amplitudes that were not different from those in sham mice. This improvement in visual function also was associated with a significant reduction in retinal GFAP, neuroinflammation markers, and oxidative stress compared to saline-treated rOBI mice. In vitro, Müller cells exposed to oxidative stress via increasing doses of hydrogen peroxide demonstrated decreased viability, increased GFAP mRNA expression, and reduced activity for the antioxidant catalase. On the other hand, oxidatively stressed Müller cells pre-incubated with ASC-CCM showed normalized GFAP, viability, and catalase activity. In conclusion, our study demonstrates that a single intravitreal injection of ASC-CCM in the rOBI can significantly rescue retinal injury and provide significant restoration of visual function. Our in vitro studies suggest that the antioxidant catalase may play a major role in the protective effects of ASC-CCM, uncovering yet another aspect of the multifaceted benefits of ASC secretome therapies in neurotrauma.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Traumatismos por Explosión / Lesiones Oculares / Células Madre Mesenquimatosas Límite: Animals / Humans Idioma: En Revista: Exp Eye Res Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Traumatismos por Explosión / Lesiones Oculares / Células Madre Mesenquimatosas Límite: Animals / Humans Idioma: En Revista: Exp Eye Res Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido