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MicroRNA-based therapeutics for optic neuropathy:opportunities and challenges

Neural Regeneration Research 2021年第10期16卷 1996-1997页

作者： heather k.mak Christopher k.S.Leung Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong Kong Special Administrative RegionChina

Optic nerve degeneration is a major cause of irreversible blindness worldwide with glaucoma being the most common optic neuropathy,affecting approximately 76 million people worldwide in *** optic nerve comprises axons of retinal ganglion cells(RGCs),the output neurons of the inner *** RGCs and axons from degeneration and regenerating RGC axons to preserve and recover vision in patients with progressive optic neuropathy is an unmet *** embryonic neurons,mature neurons of the mammalian central nervous system fail to regenerate their axons following *** age-related loss of axon regenerative capacity of RGCs over time renders vision loss from optic neuropathy *** failure of injured RGCs to regenerate axons is largely attributed to inhibitory molecules in the extrinsic environment and a change in the intrinsic molecular makeup of aging *** studies have demonstrated that RGCs require specific molecular signals for the stimulation of axon growth even without inhibitory molecules in the extrinsic environment,leading successive efforts to focus on uncovering the intrinsic signaling pathways that control axon extension during RGC development.

关键词： neuropathy degeneration stimulation

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Mapping nanoscale topographic features in thick tissues with speckle diffraction tomography

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Light(Science & Applications) 2023年第9期12卷 1877-1885页

作者： Sungsam kang Renjie Zhou Marten Brelen heather k.mak Yuechuan Lin Peter T.C.So Zahid Yaqoob Laser Biomedical Research Center G.R.Harrison Spectroscopy LaboratoryMassachusetts Institute of TechnologyCambridgeMA 02139USA Department of Biomedical Engineering The Chinese University of Hong KongHong KongChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong KongChina Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Biological Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Biomedical Engineering Boston UniversityBostonMA 02215USA

Resolving three-dimensional morphological features in thick specimens remains a significant challenge for label-free *** report a new speckle diffraction tomography(SDT)approach that can image thick biological specimens with~500 nm lateral resolution and~1μm axial resolution in a reflection *** SDT,multiple-scattering background is rejected through spatiotemporal gating provided by dynamic speckle-field interferometry,while depth-resolved refractive index maps are reconstructed by developing a comprehensive inverse-scattering model that also considers specimen-induced *** from the high-resolution and full-field quantitative imaging capabilities of SDT,we successfully imaged red blood cells and quantified their membrane fluctuations behind a turbid medium with a thickness of 2.8 scattering mean-free *** importantly,we performed volumetric imaging of cornea inside an ex vivo rat eye and quantified its optical properties,including the mapping of nanoscale topographic features of Dua’s and Descemet’s membranes that had not been previously visualized.

关键词： speckle inverse interferometry

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