Reference - Detail
| RRC ID | 44052 |
|---|---|
| Author | Höhn A, Sittig A, Jung T, Grimm S, Grune T. |
| Title | Lipofuscin is formed independently of macroautophagy and lysosomal activity in stress-induced prematurely senescent human fibroblasts. |
| Journal | Free Radic Biol Med |
| Abstract |
In the current literature, the lysosomal system is considered to be involved in the intracellular formation and accumulation of lipofuscin, a highly oxidized and covalently cross-linked aggregate of proteins that fills the lysosomal volume during aging. In contrast, our experimental results presented here suggest that both the autophagosomes and the lysosomal system are not mandatory for the formation of lipofuscin, since that material accumulates in the cytosolic volume if autophagy or lysosomal activity is inhibited. However, such an inhibition is accompanied by an enhanced toxicity of the formed protein aggregates. Furthermore, it could be proven that macroautophagy is responsible for the uptake of lipofuscin into the lysosomes. |
| Volume | 53(9) |
| Pages | 1760-9 |
| Published | 2012-11-1 |
| DOI | 10.1016/j.freeradbiomed.2012.08.591 |
| PII | S0891-5849(12)01108-2 |
| PMID | 22982048 |
| MeSH | Animals Autophagy* Autophagy-Related Protein 5 Cell Line Cellular Senescence* Fibroblasts / drug effects Fibroblasts / metabolism* Fibroblasts / physiology Gene Expression Gene Knockdown Techniques Humans Lipofuscin / metabolism* Lysosome-Associated Membrane Glycoproteins / metabolism Lysosomes / drug effects Lysosomes / metabolism* Mice Microtubule-Associated Proteins / genetics Microtubule-Associated Proteins / metabolism Oxidative Stress* Paraquat / pharmacology Phagosomes / drug effects RNA Interference Reactive Oxygen Species / metabolism Vacuolar Proton-Translocating ATPases / genetics Vacuolar Proton-Translocating ATPases / metabolism |
| IF | 6.17 |
| Times Cited | 36 |
| WOS Category | ENDOCRINOLOGY & METABOLISM BIOCHEMISTRY & MOLECULAR BIOLOGY |
| Resource | |
| Human and Animal Cells | Atg5^(+/+)MEF(RCB2710) Atg5^(-/-)MEF(RCB2711) |