Axon guidance molecule expression after cell therapy in a mouse model of Parkinson's disease.

CONCLUSION: Overall, our data provide a reliable basis to understand how axons of grafted neurons are able to navigate towards their targets and interact with the molecular environment in the adult brain. This should help to improve the efficiency of cell replacement approaches in PD. PMID: 27858721 [PubMed - as supplied by publisher]
Source: Restorative Neurology and Neuroscience - Category: Neurology Tags: Restor Neurol Neurosci Source Type: research

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In this study, researchers studied 438,952 participants in the UK Biobank, who had a total of 24,980 major coronary events - defined as the first occurrence of non-fatal heart attack, ischaemic stroke, or death due to coronary heart disease. They used an approach called Mendelian randomisation, which uses naturally occurring genetic differences to randomly divide the participants into groups, mimicking the effects of running a clinical trial. People with genes associated with lower blood pressure, lower LDL cholesterol, and a combination of both were put into different groups, and compared against those without thes...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
Since the discovery of induced pluripotency more than a decade ago, researchers have been working towards the use of this technology to produce cells for use in tissue engineering and regenerative therapies. Induced pluripotent stem cells are functionally equivalent to embryonic stem cells; given suitable recipes and methods for the surrounding environment and signals, they can be made to generate any of the cell types in the body. The cornea of the eye is a comparatively simple starting point for tissue engineering, easier to work with in many ways, in generating tissues and in delivering cells to the patient. Here, the f...
Source: Fight Aging! - Category: Research Authors: Tags: Daily News Source Type: blogs
In conclusion, our data show how oncogenic and tumor-suppressive drivers of cellular senescence act to regulate surveillance processes that can be circumvented to enable SnCs to elude immune recognition but can be reversed by cell surface-targeted interventions to purge the SnCs that persist in vitro and in patients. Since eliminating SnCs can prevent tumor progression, delay the onset of degenerative diseases, and restore fitness; since NKG2D-Ls are not widely expressed in healthy human tissues and NKG2D-L shedding is an evasion mechanism also employed by tumor cells; and since increasing numbers of B cells express NKG2D ...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
In conclusion, with study of the frailty syndrome still in its infancy, frailty analysis remains a major challenge. It is a challenge that needs to be overcome in order to shed light on the multiple mechanisms involved in the pathogenesis of this syndrome. Although several mechanisms contribute to frailty, immune system alteration seems to play a central role: this syndrome is characterized by increased levels of pro-inflammatory markers and the resulting pro-inflammatory status can have negative effects on various organs. Future studies should aim to better clarify the immune system alteration in frailty, and seek to esta...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
This study elucidates the potential to use mitochondria from different donors (PAMM) to treat UVR stress and possibly other types of damage or metabolic malfunctions in cells, resulting in not only in-vitro but also ex-vivo applications. Gene Therapy in Mice Alters the Balance of Macrophage Phenotypes to Slow Atherosclerosis Progression https://www.fightaging.org/archives/2019/07/gene-therapy-in-mice-alters-the-balance-of-macrophage-phenotypes-to-slow-atherosclerosis-progression/ Atherosclerosis causes a sizable fraction of all deaths in our species. It is the generation of fatty deposits in blood vessel...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
In conclusion, we show here that sEVs are responsible for mediating paracrine senescence and speculate that they could be involved in inducing bystander senescence during therapy-induced senescence or aging. In fact, when compared to soluble factors, sEVs have different biophysical and biochemical properties as they have a longer lifespan than do soluble factors and they are more resistant to protease degradation. The idea that blocking sEV secretion could be a potential therapeutic approach to alleviate senescence "spreading" during chemotherapy-induced senescence or in aging tissues presents itself as a very at...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
Abstract Transplantation of stem and progenitor cells offers a promising tool for brain repair in the context of neuropathological disorders including Parkinson's disease. There is growing proof that the capacity of adult stem and progenitor cells for tissue regeneration relies rather on the release of paracrine factors than on their cell replacement properties. In line with this notion, we have previously reported that conditioned medium (CM) collected from cultured Endothelial Progenitor Cells (EPC) stimulated survival of striatal neurons. In the present study we investigated whether EPC-CM promotes survival of ...
Source: Brain Research - Category: Neurology Authors: Tags: Brain Res Source Type: research
In this study, analysis of antioxidant defense was performed on the blood samples from 184 "aged" individuals aged 65-90+ years, and compared to the blood samples of 37 individuals just about at the beginning of aging, aged 55-59 years. Statistically significant decreases of Zn,Cu-superoxide dismutase (SOD-1), catalase (CAT), and glutathione peroxidase (GSH-Px) activities were observed in elderly people in comparison with the control group. Moreover, an inverse correlation between the activities of SOD-1, CAT, and GSH-Px and the age of the examined persons was found. No age-related changes in glutathione reductas...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
In conclusion, there is solid evidence that obesity deregulates cellular mechanisms related to nutrient sensing. Altered Intercellular Communication It is accepted that aging impacts the organism at the cellular level, but also decreases the capacity of cells of an organism to interact. During aging, there is a decreased communication at the neuronal, neuroendocrine, and endocrine levels. Two of the most compelling examples of impaired communication are inflammaging and immunosenescence. The inflammaging phenotype results in elevated cytokines. These cytokines can accelerate and propagate the aging process. T...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
In this study, a significant (30%) increase in maximum lifespan of mice was found after nonablative transplantation of 100 million nucleated bone marrow (BM) cells from young donors, initiated at the age that is equivalent to 75 years for humans. Moreover, rejuvenation was accompanied by a high degree of BM chimerism for the nonablative approach. Six months after the transplantation, 28% of recipients' BM cells were of donor origin. The relatively high chimerism efficiency that we found is most likely due to the advanced age of our recipients having a depleted BM pool. In addition to the higher incorporation rates, ...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
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