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https://www.readbyqxmd.com/read/28441118/mechanisms-of-hippocampal-aging-and-the-potential-for-rejuvenation
#1
Xuelai Fan, Elizabeth G Wheatley, Saul A Villeda
The past two decades have seen remarkable progress in our understanding of the multifactorial drivers of hippocampal aging and cognitive decline. Recent findings have also raised the possibility of functional rejuvenation in the aged hippocampus. In this review, we aim to synthesize the mechanisms that drive hippocampal aging and evaluate critically the potential for rejuvenation. We discuss the functional changes in synaptic plasticity and regenerative potential of the aged hippocampus, followed by mechanisms of microglia aging, and assess the cross talk between these proaging processes...
April 24, 2017: Annual Review of Neuroscience
https://www.readbyqxmd.com/read/28437543/association-of-donor-age-and-sex-with-survival-of-patients-receiving-transfusions
#2
Gustaf Edgren, Henrik Ullum, Klaus Rostgaard, Christian Erikstrup, Ulrik Sartipy, Martin J Holzmann, Olof Nyrén, Henrik Hjalgrim
Importance: Following animal model data indicating the possible rejuvenating effects of blood from young donors, there have been at least 2 observational studies conducted with humans that have investigated whether donor age affects patient outcomes. Results, however, have been conflicting. Objective: To study the association of donor age and sex with survival of patients receiving transfusions. Design, Setting, and Participants: A retrospective cohort study based on the Scandinavian Donations and Transfusions database, with nationwide data, was conducted for all patients from Sweden and Denmark who received at least 1 red blood cell transfusion of autologous blood or blood from unknown donors between January 1, 2003, and December 31, 2012...
April 24, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28435048/morella-serrata-lam-killick-stabilizes-biomembrane-and-rejuvenates-sexual-competence-in-male-wistar-rats
#3
S Sabiu, Aot Ashafa
ETHNOPHARMACOLOGICAL RELEVANCE: Morella serrata L. is an indigenous medicinal plant to South and southern Africa with folkloric applications as aphrodisiac, laxative, antimicrobial, anti-inflammatory, analgesic, anti-hypertensive, antitussive and antidiabetic agent. AIM OF THE STUDY: This study evaluated the membrane stabilization and aphrodisiac potentials of its aqueous root extract in male Wistar rats. MATERIALS AND METHODS: While the membrane stabilization of the extract was investigated against bovine erythrocytes (BE), the male rats for the aphrodisiac study were randomized into five groups with animals in group 1 given sterile placebo and served as control...
April 20, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28430736/vertical-lifting-a-new-optimal-thread-lifting-technique-for-asians
#4
Seung Hoon Kang, Eun Jung Byun, Hei Sung Kim
BACKGROUND: With the evolution of facial rejuvenation methods, thread lifts have gained popularity among patients who seek cosmetic improvement. Absorbable wedge-shaped polydioxanone (PDO) sutures are currently available, and they are extremely popular in the aesthetic clinics in Korea. In case of midface and mandibular jowl lift, threads are most often inserted in an oblique manner with vectors of rejuvenation directed toward the temple. However, specific characteristics of skeletal anatomy should be considered when deciding which technique to use in Asians...
April 19, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28411325/a-literature-update-elucidating-production-of-panax-ginsenosides-with-a-special-focus-on-strategies-enriching-the-anti-neoplastic-minor-ginsenosides-in-ginseng-preparations
#5
REVIEW
Tanya Biswas, A K Mathur, Archana Mathur
Ginseng, an oriental gift to the world of healthcare and preventive medicine, is among the top ten medicinal herbs globally. The constitutive triterpene saponins, ginsenosides, or panaxosides are attributed to ginseng's miraculous efficacy towards anti-aging, rejuvenating, and immune-potentiating benefits. The major ginsenosides such as Rb1, Rb2, Rc, Rd., Re, and Rg1, formed after extensive glycosylations of the aglycone "dammaranediol," dominate the chemical profile of this genus in vivo and in vitro. Elicitations have successfully led to appreciable enhancements in the production of these major ginsenosides...
April 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28405275/the-reproductive-potential-and-importance-of-key-management-aspects-for-successful-calluna-vulgaris-rejuvenation-on-abandoned-continental-heaths
#6
Katrin Henning, Goddert von Oheimb, Werner Härdtle, Andreas Fichtner, Sabine Tischew
The abandonment of traditional pastoralism as well as the use of heath areas for military purposes has had a major impact on dry heaths in the Continental biogeographical region of Europe, causing severe degradation of its key species Calluna vulgaris (L.) HULL. The reproductive potential of this species in a Continental climate is assumed to be low, although there is yet no observational or experimental evidence for this. More knowledge is also needed about cost-effective and sustainable measures to restore abandoned dry heaths in this biogeographical region, because traditional management options are often too expensive (e...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28403273/the-mechanisms-and-potential-impact-of-stem-cell-activation-in-skin-rejuvenation-an-evidence-based-analysis
#7
Hema Sundaram
<p>Stem cells can propagate indefinitely in an undifferentiated state; or, with appropriate signals, differentiate into various types of mature cells. Strong interest in stem cell therapies for degenerative diseases has extended to skin aging, itself a degenerative process. This article reviews mechanisms of skin aging, and enables an evidence-based approach to topical skin rejuvenation - specifically, to formulations labeled as stem cell products.</p> <p><em>J Drugs Dermatol. 2017;16(4):378-384...
April 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28403269/mid-face-volumization-with-hyaluronic-acid-injection-technique-and-safety-aspects-from-a-controlled-randomized-double-blind-clinical-study
#8
Welf Prager, Karla Agsten, Maria Kravtsov, Prof Martina Kerscher
<p>BACKGROUND: Injection of hyaluronic acid (HA) volumizing fillers in the malar area is intended for rejuvenation of the mid-face. The choice of products, depth, and technique of injection depends on the desired level of volume enhancement and practitioners' preferences.</p> <p>OBJECTIVE: To describe a volumizing injection technique in the scope of a controlled, randomized, double-blind, single-center, split-face clinical study. MATERIALS & METHODS: A total of 45 subjects with bilateral symmetrical moderate to severe volume loss in the malar area received a single 2 mL injection of CPM®-26 (Cohesive Polydensified Matrix®) on one side and VYC®-20 (VYCROSS®) on the contralateral side of the face...
April 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28403263/microneedling-in-all-skin-types-a-review
#9
Lauren Meshkov Bonati, Gorana Kuka Epstein, Tamara Lazic Strugar
<p>INTRODUCTION: Microneedling procedures are growing in popularity for a wide variety of skin conditions. This paper comprehensively reviews the medical literature regarding skin needling efficacy and safety in all skin types and in multiple dermatologic conditions.</p> <p>METHODS: A PubMed literature search was conducted in all languages without restriction and bibliographies of relevant articles reviewed. Search terms included: "microneedling," "percutaneous collagen induction," "needling," "skin needling," and "dermaroller...
April 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28402148/should-modulation-of-p50-be-a-therapeutic-target-in-the-critically-ill
#10
Amudan J Srinivasan, Clare Morkane, Daniel S Martin, Ian J Welsby
A defining feature of human hemoglobin is its oxygen binding affinity, quantified by the partial pressure of oxygen at which hemoglobin is 50% saturated (p50), and the variability of this parameter over a range of physiological and environmental states. Modulation of this property of hemoglobin can directly affect the degree of peripheral oxygen offloading and tissue oxygenation. Areas covered: This review summarizes the role of hemoglobin oxygen affinity in normal and abnormal physiology and discusses the current state of the literature regarding artificial modulation of p50...
April 12, 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28401032/modern-trends-in-lipomodeling
#11
REVIEW
Ahmed Hassan El-Sabbagh
Lipomodeling is the process of relocating autologous fat to change the shape, volume, consistency, and profile of tissues, with the aim of reconstructing, rejuvenating, and regenerating body features. There have been several important advancements in lipomodeling procedures during the last thirty years. Four clinical steps are important for the success of engraftment: fat harvesting, fat processing, fat reinjection, and preconditioning of the recipient site. With the discovery of adipose derived stem cells and dedifferentiated cells, fat cells become a major tool of regenerative medicine...
2017: GMS Interdisciplinary Plastic and Reconstructive Surgery DGPW
https://www.readbyqxmd.com/read/28397309/ultrasensitive-memristive-synapses-based-on-lightly-oxidized-sulfide-films
#12
Lingxiang Hu, Sheng Fu, Youhu Chen, Hongtao Cao, Lingyan Liang, Hongliang Zhang, Junhua Gao, Jingrui Wang, Fei Zhuge
For biological synapses, high sensitivity is crucial for transmitting information quickly and accurately. Compared to biological synapses, memristive ones show a much lower sensitivity to electrical stimuli since much higher voltages are needed to induce synaptic plasticity. Yet, little attention has been paid to enhancing the sensitivity of synaptic devices. Here, electrochemical metallization memory cells based on lightly oxidized ZnS films are found to show highly controllable memristive switching with an ultralow SET voltage of several millivolts, which likely originates from a two-layer structure of ZnS films, i...
April 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28391291/rejuvenation-of-mucosal-immunosenescence-by-adipose-tissue-derived-mesenchymal-stem-cells
#13
Akitoshi Tsuruhara, Kazuyoshi Aso, Daisuke Tokuhara, Junichiro Ohori, Masaki Kawabata, Yuichi Kurono, Jerry R McGhee, Kohtaro Fujihashi
Age-associated alterations in the mucosal immune system are generally termed mucosal immunosenescence. The major change seen in the aged mucosa is a failure to elicit an antigen-specific secretory IgA (SIgA) antibody response, which is a central player for host defense from various pathogens at mucosal surfaces. In this regard, it would be a first priority to compensate for mucosal dysregulation in the elderly in order to maintain their health in aging. We have successfully established antigen-specific SIgA antibody responses in aged (2 years old) mice, which provide protective immunity from Streptococcus pneumoniae and influenza virus infections, by using a new adjuvant system consisting of a plasmid encoding Flt3 ligand (pFL) and CpG ODN...
January 1, 2017: International Immunology
https://www.readbyqxmd.com/read/28389776/senotherapy-growing-old-and-staying-young
#14
REVIEW
Roland Schmitt
Cellular senescence, which has been linked to age-related diseases, occurs during normal aging or as a result of pathological cell stress. Due to their incapacity to proliferate, senescent cells cannot contribute to normal tissue maintenance and tissue repair. Instead, senescent cells disturb the microenvironment by secreting a plethora of bioactive factors that may lead to inflammation, regenerative dysfunction and tumor progression. Recent understanding of stimuli and pathways that induce and maintain cellular senescence offers the possibility to selectively eliminate senescent cells...
April 7, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28383554/srt1720-promotes-survival-of-aged-human-mesenchymal-stem-cells-via-faim-a-pharmacological-strategy-to-improve-stem-cell-based-therapy-for-rat-myocardial-infarction
#15
Xianbao Liu, Dexing Hu, Zhiru Zeng, Wei Zhu, Na Zhang, Hong Yu, Han Chen, Kan Wang, Yingchao Wang, Lengmei Wang, Jing Zhao, Ling Zhang, Rongrong Wu, Xinyang Hu, Jian'an Wang
SIRT1 has been proved to rejuvenate and improve the therapeutic efficacy of aged rat mesenchymal stem cells (MSCs). Herein, we investigate the protective effect of pretreatment with SIRT1 activator SRT1720 on aged human MSCs (hMSCs). The optimized pretreatment condition for aged hMSCs was determined to be 0.5 μM SRT1720 for 24 h by monitoring the survival of aged hMSCs subjected to serum deprivation±hypoxia and±500 μM hydrogen peroxide (H2O2). Pretreatment with these conditions increased the survival of aged hMSCs 1 day (2...
April 6, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28382785/autologous-platelet-rich-plasma-versus-readymade-growth-factors-in-skin-rejuvenation-a-split-face-study
#16
Heba I Gawdat, Amira M Tawdy, Rehab A Hegazy, Mohga M Zakaria, Ryham S Allam
BACKGROUND: The escalating urge for a youthful-looking skin instigates continuous innovations with minimally invasive procedures. Readymade growth factors and autologous platelet-rich plasma (PRP) represent such therapeutic interventions. OBJECTIVE: Compare the efficacy and safety of PRP to readymade growth factors in skin rejuvenation. PATIENTS AND METHODS: Twenty adult females with Fitzpatrick skin types III-IV and Glogau photoaging types II and III were enrolled in this study...
April 5, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28382497/sustained-attractiveness-and-natural-youthful-appearance-by-upper-lip-rejuvenation-minimally-invasive-procedures-to-combat-facial-aging
#17
REVIEW
Uwe Wollina, Alberto Goldman
Facial aging is a complex process individualized by interaction with exogenous and endogenous factors. The upper lip is one of the facial components by which facial attractiveness is defined. Upper lip aging is significantly influenced by maxillary bone and teeth. Aging of the cutaneous part can be aggravated by solar radiation and smoking. We provide a review about minimally invasive techniques for correction of aging signs of the upper lip with a tailored approach to patient's characteristics. The treatment is based upon use of fillers, laser, and minor surgery...
April 5, 2017: Wiener Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28380383/using-dna-methylation-profiling-to-evaluate-biological-age-and-longevity-interventions
#18
Daniel A Petkovich, Dmitriy I Podolskiy, Alexei V Lobanov, Sang-Goo Lee, Richard A Miller, Vadim N Gladyshev
The DNA methylation levels of certain CpG sites are thought to reflect the pace of human aging. Here, we developed a robust predictor of mouse biological age based on 90 CpG sites derived from partial blood DNA methylation profiles. The resulting clock correctly determines the age of mouse cohorts, detects the longevity effects of calorie restriction and gene knockouts, and reports rejuvenation of fibroblast-derived iPSCs. The data show that mammalian DNA methylomes are characterized by CpG sites that may represent the organism's biological age...
April 4, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28377604/mechanical-relaxation-to-rejuvenation-transition-in-a-zr-based-bulk-metallic-glass
#19
M Zhang, Y M Wang, F X Li, S Q Jiang, M Z Li, L Liu
The relaxation of amorphous materials, i.e., aging, would largely endanger their performances in service. Here we report a mechanical relaxation-to-rejuvenation transition of a Zr35Ti30Be27.5Cu7.5 bulk metallic glass (BMG) in elastostatic compression at ambient temperature, thus provide an accessible way to tailor the mechanical properties of amorphous materials. To unravel the structural evolution underlying the observed transition, atomistic simulations parallel with the experimental tests on a typical model glass system Zr60Cu40 were performed, which successfully reproduced and thus upheld the experimentally observed mechanical relaxation-to-rejuvenation transition...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28375975/autologous-pure-platelet-rich-plasma-dermal-injections-for-facial-skin-rejuvenation-clinical-instrumental-and-flow-cytometry-assessment
#20
Norma Cameli, Maria Mariano, Iole Cordone, Elva Abril, Serena Masi, Maria Laura Foddai
BACKGROUND: Platelet-rich plasma (PRP) is an emerging treatment in dermatology recently proposed for skin rejuvenation. OBJECTIVE: To evaluate the efficacy and safety of autologous pure PRP dermal injections on facial skin rejuvenation, investigating the cellularity of PRP samples. MATERIALS AND METHODS: Twelve patients underwent 3 sessions of PRP injection at 1-month intervals. The clinical and instrumental outcomes were evaluated before (T0) and 1 month (T1) after the end of treatment by means of transepidermal water loss, corneometry, Cutometer, Visioscan, and Visioface...
April 3, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
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