Journal: Investigative Ophthalmology & Visual Science
Article Title: Cholesterol Accumulation Promotes Photoreceptor Senescence and Retinal Degeneration
doi: 10.1167/iovs.65.10.29
Figure Lengend Snippet: Selective elimination of p16-positive senescent cells suppresses AMD-associated phenotype and senescence without altering systemic lipid metabolism. Representative electron microscopy images showing RPE cells and Bruch's membrane ( A ), and the quantification of the number of intracellular lipids in RPE cells ( B ) and Bruch's membrane thickness ( C ). Scale bar : 2 µm. Note intracellular lipids in RPE cells ( arrow ) and thickened Bruch's membrane ( arrowhead ) in Abca1/g1 -rod/-rod . ( D ) mRNA expression of senescence markers ( p16 and p21 ) and Tnf-α in the retina and RPE/choroid complex isolated from Abca1/g1 -rod/-rod and Abca1/g1 -rod/-rod ;INK-ATTAC. Fat percentage ( E ), cholesterol ester in plasma and liver (F), and triglyceride and free fatty acids in adipose tissue ( G ) of Abca1/g1 -rod/-rod and Abca1/g1 -rod/-rod ;INK-ATTAC. * P < 0.05; ** P < 0.01; *** P < 0.001; **** P < 0.0001, t -test. Data are represented as mean ± SEM.
Article Snippet: To generate mice deficient in Abca1 and Abcg1 in photoreceptors ( Abca1/g1 -rod/-rod ), Abca1 flox/flox /Abcg1 flox/flox ( Abca1/g1 f/f ) mice purchased from the Jackson Laboratory (021067) were crossed with mice with Rhodopsin-iCre75 transgene mice, which were originally provided by Dr. Ching-Kang Jason Chen., INK-ATTAC transgene mice were provided by Unity Biotechnology 33 and crossed with Abca1/g1 -rod/-rod to generate Abca1/g1 -rod/-rod ;INK-ATTAC.
Techniques: Electron Microscopy, Membrane, Expressing, Isolation