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Modulation of the autophagy ‐lysosomal pathway and endoplasmic reticulum stress by ketone bodies in experimental models of stroke
We report for the first time that the protective effect of β-hydroxybutyrate (BHB) against stroke and glucose deprivation is enantiomer selective. We discovered that D-BHB treatment prevented the cleavage of the lysosomal membrane protein LAMP2, maintained lysosome integrity and stimulated the autophagic flux. Also, D-BHB notably reduced the activation of the PERK and IRE1α branches of the unfolded protein response (UPR), attenuating protein synthesis inhibition and preventing endoplasmic reticulum stress. Together our results support the therapeutic use of D-BHB treatment post-ischemia, by preventing the loss of proteos...
Source: Journal of Neurochemistry - June 17, 2023 Category: Neuroscience Authors: Teresa Montiel, Juan Carlos G ómora‐García, Cristian Gerónimo‐Olvera, Yessica Heras‐Romero, Berenice N. Bernal‐Vicente, Xochitl Pérez‐Martínez, Luis B. Tovar‐y‐Romo, Lourdes Massieu Tags: ORIGINAL ARTICLE Source Type: research

Plasma Kallikrein Contributes to Intracerebral Hemorrhage and Hypertension in Stroke-Prone Spontaneously Hypertensive Rats
This report investigates the role of PKa on hemorrhage and hypertension in stroke-prone spontaneously hypertensive rats (SHRSP). SHRSP were fed with a high salt-containing stroke-prone diet to increase blood pressure and induce intracerebral hemorrhage. The roles of PKa on blood pressure, hemorrhage, and survival in SHRSP were examined in rats receiving a PKa inhibitor or plasma prekallikrein antisense oligonucleotide (PK ASO) compared with rats receiving control ASO. Effects on PKa on the proteolytic cleavage of atrial natriuretic peptide (ANP) were analyzed by tandem mass spectrometry. We show that SHRSP on high-salt die...
Source: Cell Research - July 9, 2021 Category: Cytology Authors: Jian Guan Allen C Clermont Loc-Duyen Pham Tuna Ustunkaya Alexey S Revenko A Robert MacLeod Edward P Feener Fabr ício Simão Source Type: research