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Fight Aging! Newsletter, January 21st 2019
In this study, scientists screened cells from old animals to identify any RBPs that change upon aging. The screening showed that one particular protein, Pumilio2 (PUM2), was highly induced in old animals. PUM2 binds mRNA molecules containing specific recognition sites. Upon its binding, PUM2 represses the translation of the target mRNAs into proteins.
Using a systems genetics approach, the researchers then identified a new mRNA target that PUM2 binds. The mRNA encodes for a protein called Mitochondrial Fission Factor (MFF), and is a pivotal regulator of mitochondrial fission - a process by which mitochondria break u...
Source: Fight Aging! - January 20, 2019 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Fight Aging! Newsletter, June 19th 2017
This study is the first to show that downregulation of PAPP-A expression in adult mice can significantly extend life span.
Importantly, this beneficial longevity phenotype is distinct from the dwarfism of long-lived PAPP-A KO, Ames dwarf, Snell dwarf and growth hormone receptor (GHR) KO mice with germ-line mutations. Thus, downregulation of PAPP-A expression joins other treatment regimens, such as resveratrol, rapamycin and dietary restriction, which can extend life span when started in mice as adults. In a recent study, inducible knockdown of the GHR in young adult female mice increased maximal, but not median, lif...
Source: Fight Aging! - June 18, 2017 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Fight Aging! Newsletter, October 30th 2017
In this study, the researchers showed a causal link between dynamic changes in the shapes of mitochondrial networks and longevity.
The scientists used C. elegans (nematode worms), which live just two weeks and thus enable the study of aging in real time in the lab. Mitochondrial networks inside cells typically toggle between fused and fragmented states. The researchers found that restricting the worms' diet, or mimicking dietary restriction through genetic manipulation of an energy-sensing protein called AMP-activated protein kinase (AMPK), maintained the mitochondrial networks in a fused or "youthful" state. In add...
Source: Fight Aging! - October 29, 2017 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Fight Aging! Newsletter, February 19th 2018
Fight Aging! provides a weekly digest of news and commentary for thousands of subscribers interested in the latest longevity science: progress towards the medical control of aging in order to prevent age-related frailty, suffering, and disease, as well as improvements in the present understanding of what works and what doesn't work when it comes to extending healthy life. Expect to see summaries of recent advances in medical research, news from the scientific community, advocacy and fundraising initiatives to help speed work on the repair and reversal of aging, links to online resources, and much more.
This content is...
Source: Fight Aging! - February 18, 2018 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Fight Aging! Newsletter, March 29th 2021
Discussion of Systemic Inflammation and its Contribution to Dementia
Fisetin Reduces D-Galactose Induced Cognitive Loss in Mice
Reprogramming Cancer Cells into Normal Somatic Cells
Considering Longevity Medicine and the Education of Physicians
Researchers Generate Thyroid Organoids Capable of Restoring Function in Mice
In Search of Transcriptional Signatures of Aging
A Pace of Aging Biomarker Correlates with Manifestations of Aging
Targeting Tissues with Extracellular Vesicles
Calorie Restriction Slows Aging of the Gut Microbiome in Mice
Mitochondrial DNA Heteroplasmy in the Aging Heart
Evidence for Hea...
Source: Fight Aging! - March 28, 2021 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Fight Aging! Newsletter, December 19th 2022
In conclusion, p16 deletion or p16 positive cell clearance could be a novel strategy preventing long term HFD-induced skin aging.
Association of LDL-Cholesterol with Mortality
https://www.fightaging.org/archives/2022/12/association-of-ldl-cholesterol-with-mortality/
Researchers here report on a study of LDL-cholesterol and mortality risk in older people. As they note, data on this topic is conflicted once one moves beyond the matter of cardiovascular disease. Over a lifetime, higher LDL-cholesterol makes it easier to reach the tipping point at which cholesterol deposited in blood vessel walls produces en...
Source: Fight Aging! - December 18, 2022 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Improved islet transplantation outcome by the co-delivery of siRNAs for iNOS and 17β-estradiol using an R3V6 peptide carrier.
Abstract
Silencing target genes such as inducible nitric oxide synthase (iNOS) using small interfering double-stranded RNA (siRNA) in islet cells has been attempted to enhance the survival of transplanted islets. However, the efficient and safe delivery of siRNA into intact islets is challenging. Here, we prepared R3V6 peptides containing a three-arginine stretch and a six-valine stretch, which form micelles with hydrophobic valine cores and cationic arginine surfaces in aqueous solution, to co-deliver siRNA and cytoprotective hydrophobic drugs to islet cells. The cationic surfaces bound to the negatively charged ...
Source: Biomaterials - December 6, 2014 Category: Materials Science Authors: Hwang HJ, Lee M, Park JH, Jung HS, Kang JG, Kim CS, Lee SJ, Ihm SH Tags: Biomaterials Source Type: research
Novel Complement C5 Small-interfering RNA Lipid Nanoparticle Prolongs Graft Survival in a Hypersensitized Rat Kidney Transplant Model
Conclusions.
C5 siRNA-LNP combined with immunosuppressants CsA and DSG downregulated C5 activity and significantly prolonged graft survival compared with control siRNA-LNP with CsA and DSG. Downregulation of C5 expression using C5 siRNA-LNP may be an effective therapeutic approach for AMR.
Source: Transplantation - December 1, 2022 Category: Transplant Surgery Tags: Original Basic Science Source Type: research
Fight Aging! Newsletter, January 16th 2023
Conclusions
Implanted Hair Follicle Cells Produce Remodeling of Scar Tissue
Assessment of Somatic Mosaicism as a Biomarker of Aging
The Gut Microbiome of Centenarians
https://www.fightaging.org/archives/2023/01/the-gut-microbiome-of-centenarians/
The state of the gut microbiome is arguably as influential on health as exercise. Various microbial species present in the gut produce beneficial metabolites, such as butyrate, or harmful metabolites, such as isoamylamine, or can provoke chronic inflammation in a variety of ways. An individual can have a better or worse microbiome, assessing these and other fu...
Source: Fight Aging! - January 15, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Fight Aging! Newsletter, April 3rd 2023
Fight Aging! publishes news and commentary relevant to the goal of ending all age-related disease, to be achieved by bringing the mechanisms of aging under the control of modern medicine. This weekly newsletter is sent to thousands of interested subscribers. To subscribe or unsubscribe from the newsletter,
please visit:
https://www.fightaging.org/newsletter/
Longevity Industry Consulting Services
Reason, the founder of Fight Aging! and Repair Biotechnologies, offers strategic consulting services to investors, entrepreneurs, and others interested in the longevity industry and its complexities. To find out m...
Source: Fight Aging! - April 2, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Naked caspase 3 small interfering RNA is effective in cold preservation but not in autotransplantation of porcine kidneys
Conclusions: Naked caspase 3 siRNA administered into the kidney was effective in cold preservation but not enough to protect posttransplant kidneys, which might be because of systemic complementary responses overcoming local effects.
Source: Journal of Surgical Research - July 27, 2012 Category: Surgery Authors: Cheng Yang, Yichen Jia, Tian Zhao, Yinjia Xue, Zitong Zhao, Junlin Zhang, Jina Wang, Xuanchuan Wang, Yongyin Qiu, Miao Lin, Dong Zhu, Guisheng Qi, Yue Qiu, Qunye Tang, Ruiming Rong, Ming Xu, Sujie Ni, Bin Lai, Michael L. Nicholson, Tongyu Zhu, Bin Yang Tags: Transplantation/Immunology Source Type: research
Synergic silencing of costimulatory molecules prevents cardiac allograft rejection
Conclusion:
This study demonstrates that the simultaneous silencing of CD40 and CD80 genes has synergistic effects in preventing allograft rejection, and may therefore have therapeutic potential in clinical transplantation.
Source: Journal of Translational Medicine - May 22, 2014 Category: Research Authors: Xusheng ZhangYanling LiuGuangfeng ZhangJun ShiXiao ZhangXiufen ZhengAlex JiangZhu-Xu ZhangNathan JohnstonKing SiuRuiqi ChenDameng LianDavid KoosDouglas QuanWei-Ping Min Source Type: research
Suppression of NF‐kappaB p65 expression attenuates delayed xenograft rejection
ConclusionTransfection of NF‐kappaB p65 siRNA in donor animals can delay the emergence of DXR. This treatment may be used as part of strategies to minimize the complex and multi‐faceted rejection responses in vascularized xenografts.
Source: Xenotransplantation - March 13, 2013 Category: Transplant Surgery Authors: Zhenya Shen, Wenxue Ye, Xiaomei Ten Tags: Original Article Source Type: research
Small Interfering RNA Targeting Nuclear Factor Kappa B to Prevent Vein Graft Stenosis in Rat Models
We examined whether neointimal hyperplasia and vein graft stenosis could be inhibited by silencing the NF-κB gene with small interference RNA (siRNA).Methods: Sixty adult male Sprague-Dawley rats were randomly divided into a normal vein group, a vein graft group, a scrambled siRNA group, and an NF-κB siRNA group. We performed reverse interpositional grafting of the autologous external jugular vein to the abdominal aorta. Vein grafts were treated with liposome and gel complexes containing NF-κB siRNA or scrambled siRNA. The levels of monocyte chemoattractant protein -1, tumor necrosis factor-α, and NF-κB p65 in vessel ...
Source: Transplantation Proceedings - July 1, 2013 Category: Transplant Surgery Authors: X.B. Meng, X.L. Bi, H.L. Zhao, J.B. Feng, J.P. Zhang, G.M. Song, W.Y. Sun, Y.W. Bi Tags: Experimental Observations Source Type: research
PU.1-silenced dendritic cells prolong allograft survival in rats receiving intestinal transplantation.
CONCLUSION: PU.1-silenced semi-mature DCs induced partial immune tolerance both in vitro and in vivo, which could be used as a new strategy to promote transplantation tolerance.
PMID: 24282365 [PubMed - in process]
Source: World Journal of Gastroenterology : WJG - November 21, 2013 Category: Gastroenterology Authors: Xu XW, Ding BW, Zhu CR, Ji W, Li JS Tags: World J Gastroenterol Source Type: research
