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Eun Nim Kim, Ji Hee Lim, Min Young Kim, Tae Hyun Ban, In-Ae Jang, Hye Eun Yoon, Cheol Whee Park, Yoon Sik Chang, Bum Soon Choi
BACKGROUND: Two important issues in the aging kidney are mitochondrial dysfunction and oxidative stress. An Nrf2 activator, resveratrol, is known to have various effects. Resveratrol may prevent inflammation and oxidative stress by activating Nrf2 and SIRT1 signaling. We examined whether resveratrol could potentially ameliorate the cellular condition, such as renal injury due to cellular oxidative stress and mitochondrial dysfunction caused by aging. METHODS: Male 18-month-old C57BL/6 mice were used...
January 11, 2018: Aging
Małgorzata Szkup, Aleksander Jerzy Owczarek, Daria Schneider-Matyka, Jacek Brodowski, Beata Łój, Elżbieta Grochans
INTRODUCTION: Metabolic syndrome (MetS) is regarded as a set of abnormalities, increasing the risk of serious functioning disorders. It can develop as a result of genetic predisposition. AIM: The aim of this study was to establish associations between MetS-related abnormalities and the PPAR-γ rs1801282, FTO rs9939609, and MC4R rs17782313 polymorphisms. MATERIAL AND METHODS: The study involved 425 women aged 45-60 years. The participants were surveyed and subjected to anthropometric, biochemical and genetic analysis...
January 9, 2018: Aging
Claudia Schwarz, Slaven Stekovic, Miranka Wirth, Gloria Benson, Philipp Royer, Stephan J Sigrist, Thomas Pieber, Christopher Dammbrueck, Christoph Magnes, Tobias Eisenberg, Tobias Pendl, Jens Bohlken, Theresa Köbe, Frank Madeo, Agnes Flöel
Supplementation of spermidine, an autophagy-inducing agent, has been shown to protect against neurodegeneration and cognitive decline in aged animal models. The present translational study aimed to determine safety and tolerability of a wheat germ extract containing enhanced spermidine concentrations. In a preclinical toxicity study, supplementation of spermidine using this extract did not result in morbidities or changes in behavior in BALBc/Rj mice during the 28-days repeated-dose tolerance study. Post mortem examination of the mice organs showed no increase in tumorigenic and fibrotic events...
January 8, 2018: Aging
Andrea Del Campo, Ignacio Contreras-Hernández, Mauricio Castro-Sepúlveda, Cristian A Campos, Reinaldo Figueroa, María Florencia Tevy, Verónica Eisner, Mariana Casas, Enrique Jaimovich
Sarcopenia is the degenerative loss of muscle mass and strength with aging. Although a role of mitochondrial metabolism in muscle function and in the development of many diseases has been described, the role of mitochondrial topology and dynamics in the process of muscle aging is not fully understood. This work shows a time line of changes in both mitochondrial distribution and skeletal muscle function during mice lifespan. We isolated muscle fibers from flexor digitorum brevis of mice of different ages. A fusion-like phenotype of mitochondria, together with a change in orientation perpendicular to the fiber axis was evident in the Adult group compared to Juvenile and Older groups...
January 4, 2018: Aging
Rahul Bhome, Rebecca W Goh, Marc D Bullock, Nir Pillar, Stephen M Thirdborough, Massimiliano Mellone, Reza Mirnezami, Dieter Galea, Kirill Veselkov, Quan Gu, Timothy J Underwood, John N Primrose, Olivier De Wever, Noam Shomron, A Emre Sayan, Alex H Mirnezami
Colorectal cancer is a global disease with increasing incidence. Mortality is largely attributed to metastatic spread and therefore, a mechanistic dissection of the signals which influence tumor progression is needed. Cancer stroma plays a critical role in tumor proliferation, invasion and chemoresistance. Here, we sought to identify and characterize exosomal microRNAs as mediators of stromal-tumor signaling. In vitro, we demonstrated that fibroblast exosomes are transferred to colorectal cancer cells, with a resultant increase in cellular microRNA levels, impacting proliferation and chemoresistance...
December 28, 2017: Aging
Zhen-Bo Wang, Jian-Xiu Hao, Tie-Gang Meng, Lei Guo, Ming-Zhe Dong, Li-Hua Fan, Ying-Chun Ouyang, Guopeng Wang, Qing-Yuan Sun, Xiang-Hong Ou, Yuan-Qing Yao
Elder women suffer from low or loss of fertility because of decreasing oocyte quality as maternal aging. As energy resource, mitochondria play pivotal roles in oocyte development, determining oocyte quality. With advanced maternal age, increased dysfunctions emerge in oocyte mitochondria, which decrease oocyte quality and its developmental potential. Mitochondria supplement as a possible strategy for improving egg quality has been in debate due to ethnic problems. Heterogeneity is an intractable problem even transfer of germinal vesicle, spindle, pronuclei or polar body is employed...
December 27, 2017: Aging
Ning Zhou, Shaunrick Stoll, Hongyu Qiu
No abstract text is available yet for this article.
December 26, 2017: Aging
Djihad Hadjadj, Su-Jung Kim, Thomas Denecker, Laura Ben Driss, Jean-Charles Cadoret, Chrystelle Maric, Giuseppe Baldacci, Fabien Fauchereau
High proliferation rate and high mutation density are both indicators of poor prognosis in adrenocortical carcinomas. We performed a hypothesis-driven association study between clinical features in adrenocortical carcinomas and the expression levels of 136 genes involved in DNA metabolism and G1/S phase transition. In 79 samples downloaded from The Cancer Genome Atlas portal, high Cyclin Dependent Kinase 6 (CDK6) mRNA levels gave the most significant association with shorter time to relapse and poorer survival of patients...
December 26, 2017: Aging
Maneesha Aluru, Tori McKinney, Anne-Kathryn L Venero, Shilpa Choudhury, Matthew Torres
Using a systems-based approach, we have identified several genes not previously evaluated for a role(s) in chronological aging. Here, we have thoroughly investigated the chronological lifespan (CLS) of three of these genes (FUS3, KSS1 and HOG1) and their protein products, each of which have well-defined cell signaling roles in young cells. The importance of FUS3 and KSS1 in CLS are largely unknown and analyzed here for the first time. Using both qualitative and quantitative CLS assays, we show that deletion of any of the three MAPK's increases yeast lifespan...
December 21, 2017: Aging
Guanglin Chen, Chunxia Du, Ziyang Shen, Lei Peng, Hua Xie, Rujin Zang, Hongxing Li, Yankai Xia, Weibing Tang
BackgroundHirschsprung's disease (HSCR) is a common digestive disease caused by impaired development of neural crest cells. Some studies have revealed the roles of microRNA (miRNA) in various diseases. But the function of miRNA in HSCR needs further investigation.MethodsWe adopted qRT-PCR and immunoblot analyses to explore the relative expression of miR-939 and LRSAM1 in 80 HSCR bowel tissues and 80 normal bowel tissues. CCK-8 assay, transwell assay and flow cytometry were used to evaluate the function of miR-939 by overexpression of miR-939 in 293T, SK-N-BE(2), SH-SY5Y cell lines...
December 18, 2017: Aging
Bela Ozsvari, Gloria Bonuccelli, Rosa Sanchez-Alvarez, Richard Foster, Federica Sotgia, Michael P Lisanti
Here, we performed high-throughput drug-screening to identify new non-toxic mitochondrial inhibitors. This screening platform was specifically designed to detect compounds that selectively deplete cellular ATP levels, but have little or no toxic side effects on cell viability. Using this approach, we identified DPI (Diphenyleneiodonium chloride) as a new potential therapeutic agent. Mechanistically, DPI potently blocks mitochondrial respiration by inhibiting flavin-containing enzymes (FMN and FAD-dependent), which form part of Complex I and II...
December 16, 2017: Aging
Timothy A Donlon, Bradley J Willcox, Brian J Morris
No abstract text is available yet for this article.
December 14, 2017: Aging
Cara Green, Sharon Mitchell, John Speakman
No abstract text is available yet for this article.
December 13, 2017: Aging
Paola Fuschi, Matteo Carrara, Christine Voellenkle, Jose Manuel Garcia-Manteiga, Paolo Righini, Biagina Maimone, Elena Sangalli, Francesco Villa, Claudia Specchia, Mario Picozza, Giovanni Nano, Carlo Gaetano, Gaia Spinetti, Annibale A Puca, Alessandra Magenta, Fabio Martelli
Oxidative stress plays a fundamental role in many conditions. Specifically, redox imbalance inhibits endothelial cell (EC) growth, inducing cell death and senescence. We used global transcriptome profiling to investigate the involvement of noncoding-RNAs in these phenotypes. By RNA-sequencing, transcriptome changes were analyzed in human ECs exposed to H2O2, highlighting a pivotal role of p53-signaling. Bioinformatic analysis and validation in p53-silenced ECs, identified several p53-targets among both mRNAs and long noncoding-RNAs (lncRNAs), including MALAT1 and NEAT1...
December 12, 2017: Aging
Mihwa Kim, Liza D Morales, Dae Joon Kim
No abstract text is available yet for this article.
December 12, 2017: Aging
Elizabeth R Murray, Angus J M Cameron
No abstract text is available yet for this article.
December 12, 2017: Aging
Manish V Bais
No abstract text is available yet for this article.
December 11, 2017: Aging
Fernando Ferreira
No abstract text is available yet for this article.
December 11, 2017: Aging
Yang Yu, Rong Tan, Qian Ren, Boya Gao, Zhejin Sheng, Juanlian Zhang, Xiaoqing Zheng, Ying Jiang, Li Lan, Zhiyong Mao
Robust DNA double strand break (DSB) repair and stabilized telomeres help maintain genome integrity, preventing the onset of aging or tumorigenesis. POT1 is one of the six factors in the shelterin complex, which protects telomeres from being recognized as DNA damages. TRF1 and TRF2, two other shelterin proteins, have been shown to participate in DNA DSB repair at non-telomeric regions, but whether POT1, which binds to single strand telomeric DNA at chromosomal ends, is involved in DNA DSB repair has not been assessed...
December 8, 2017: Aging
Jolien S de Groot, Paul J van Diest, Patrick W B Derksen
No abstract text is available yet for this article.
December 8, 2017: Aging
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