Electron Transport Complex III

Publication Title: 
Experimental Biology and Medicine (Maywood, N.J.)

Aging degrades motivation, cognition, sensory modalities and physical capacities, essentially dimming zestful living. Bradykinesis (declining physical movement) is a highly reliable biomarker of aging and mortality risk. Mice fed a complex dietary supplement (DSP) designed to ameliorate five mechanisms associated with aging showed no loss of total daily locomotion compared with >50% decrement in old untreated mice.

Author(s): 
Aksenov, Vadim
Long, Jiangang
Lokuge, Sonali
Foster, Jane A.
Liu, Jiankang
Rollo, C. David
Publication Title: 
Proceedings of the National Academy of Sciences of the United States of America

There is an urgent need for new antimalarial drugs with novel mechanisms of action to deliver effective control and eradication programs. Parasite resistance to all existing antimalarial classes, including the artemisinins, has been reported during their clinical use. A failure to generate new antimalarials with novel mechanisms of action that circumvent the current resistance challenges will contribute to a resurgence in the disease which would represent a global health emergency.

Author(s): 
Biagini, Giancarlo A.
Fisher, Nicholas
Shone, Alison E.
Mubaraki, Murad A.
Srivastava, Abhishek
Hill, Alisdair
Antoine, Thomas
Warman, Ashley J.
Davies, Jill
Pidathala, Chandrakala
Amewu, Richard K.
Leung, Suet C.
Sharma, Raman
Gibbons, Peter
Hong, David W.
Pacorel, Bénédicte
Lawrenson, Alexandre S.
Charoensutthivarakul, Sitthivut
Taylor, Lee
Berger, Olivier
Mbekeani, Alison
Stocks, Paul A.
Nixon, Gemma L.
Chadwick, James
Hemingway, Janet
Delves, Michael J.
Sinden, Robert E.
Zeeman, Anne-Marie
Kocken, Clemens H. M.
Berry, Neil G.
O'Neill, Paul M.
Ward, Stephen A.
Publication Title: 
PloS One

Withaferin A (WA), a promising anticancer constituent of Ayurvedic medicinal plant Withania somnifera, inhibits growth of MDA-MB-231 and MCF-7 human breast cancer cells in culture and MDA-MB-231 xenografts in vivo in association with apoptosis induction, but the mechanism of cell death is not fully understood. We now demonstrate, for the first time, that WA-induced apoptosis is mediated by reactive oxygen species (ROS) production due to inhibition of mitochondrial respiration.

Author(s): 
Hahm, Eun-Ryeong
Moura, Michelle B.
Kelley, Eric E.
Van Houten, Bennett
Shiva, Sruti
Singh, Shivendra V.
Publication Title: 
PloS One

Withaferin A (WA), a promising anticancer constituent of Ayurvedic medicinal plant Withania somnifera, inhibits growth of MDA-MB-231 and MCF-7 human breast cancer cells in culture and MDA-MB-231 xenografts in vivo in association with apoptosis induction, but the mechanism of cell death is not fully understood. We now demonstrate, for the first time, that WA-induced apoptosis is mediated by reactive oxygen species (ROS) production due to inhibition of mitochondrial respiration.

Author(s): 
Hahm, Eun-Ryeong
Moura, Michelle B.
Kelley, Eric E.
Van Houten, Bennett
Shiva, Sruti
Singh, Shivendra V.
Publication Title: 
American Journal of Physiology. Regulatory, Integrative and Comparative Physiology

Comparing biological processes in closely related species with divergent life spans is a powerful approach to study mechanisms of aging. The oxidative stress hypothesis of aging predicts that longer-lived species would have lower reactive oxygen species (ROS) generation and/or an increased antioxidant capacity, resulting in reduced oxidative damage with age than in shorter-lived species.

Author(s): 
Shi, Yun
Pulliam, Daniel A.
Liu, Yuhong
Hamilton, Ryan T.
Jernigan, Amanda L.
Bhattacharya, Arunabh
Sloane, Lauren B.
Qi, Wenbo
Chaudhuri, Asish
Buffenstein, Rochelle
Ungvari, Zoltan
Austad, Steven N.
Van Remmen, Holly
Publication Title: 
American Journal of Physiology. Cell Physiology

Caloric restriction (CR) without malnutrition has been shown to increase maximal life span and delay the rate of aging in a wide range of species. It has been proposed that reduction in energy expenditure and oxidative damage may explain the life-extending effect of CR. Sex-related differences also have been shown to influence longevity and energy expenditure in many mammalian species. The aim of the present study was to determine the sex-related differences in rat liver mitochondrial machinery, bioenergetics, and oxidative balance in response to short-term CR.

Author(s): 
Valle, A.
Guevara, R.
García-Palmer, F. J.
Roca, P.
Oliver, J.
Publication Title: 
Circulation Research

RATIONALE: Caloric restriction (CR) confers cardioprotection against ischemia/reperfusion injury. However, the exact mechanism(s) underlying CR-induced cardioprotection remain(s) unknown. Recent evidence indicates that Sirtuins, NAD(+)-dependent deacetylases, regulate various favorable aspects of the CR response. Thus, we hypothesized that deacetylation of specific mitochondrial proteins during CR preserves mitochondrial function and attenuates production of reactive oxygen species during ischemia/reperfusion.

Author(s): 
Shinmura, Ken
Tamaki, Kayoko
Sano, Motoaki
Nakashima-Kamimura, Naomi
Wolf, Alexander M.
Amo, Taku
Ohta, Shigeo
Katsumata, Yoshinori
Fukuda, Keiichi
Ishiwata, Kyoko
Suematsu, Makoto
Adachi, Takeshi
Publication Title: 
PloS One

Tetramethylpyrazine (TMP) is an active compound isolated from a Chinese herbal prescription that is widely used in traditional Chinese medicine for the treatment of inflammatory and cardiovascular diseases. We have previously reported that TMP acts as a potent antioxidant protecting endothelial cells against high glucose-induced damages. However, the molecular mechanism responsible for the antioxidant effect of TMP remains to be elucidated.

Author(s): 
Xu, Qiong
Xia, Pu
Li, Xi
Wang, Wei
Liu, Zhenqi
Gao, Xin
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