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Klotho

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https://www.readbyqxmd.com/read/29321045/stem-cells-and-anti-aging-genes-double-edged-sword-do-the-same-job-of-life-extension
#1
REVIEW
Mujib Ullah, Zhongjie Sun
Aging impacts diseases and lifespan. With current knowledge of stem cells, it is feasible to design and test interventions that delay aging and improve both health and lifespan. Stem cells, together with anti-aging genes such as Klotho, play a crucial role in delaying the aging process. Stem cells in combination with anti-aging genes make a complex and protective shield, which stand against the eroding effects of aging. Increased wear and tear of the stem cells, as well as Klotho deficiency, is expected to heavily increase cellular damage and accelerate the process of aging...
January 10, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29320841/the-role-of-klotho-in-systemic-sclerosis
#2
R Talotta, S Bongiovanni, T Letizia, F Rigamonti, F Atzeni, M Benucci, T Vago, P Sarzi-Puttini
The aim was to evaluate the role of klotho in the pathogenesis of systemic sclerosis (SSc), through the measurement of its serum concentration in SSc patients compared to healthy controls, and to assess the association with cutaneous and visceral involvement. Blood samples obtained from both SSc patients and healthy controls were analysed by an ELISA assay for the detection of human klotho. SSc patients were globally evaluated for disease activity and assessed through the modified Rodnan's Skin Score, Medsger's scale, pulmonary function tests, 2D-echocardiography, nailfold capillaroscopy and laboratory tests...
December 21, 2017: Reumatismo
https://www.readbyqxmd.com/read/29313136/klotho-g-395a-gene-polymorphism-impact-on-progression-of-end-stage-renal-disease-and-development-of-cardiovascular-complications-in-children-on-dialysis
#3
Eman A Elghoroury, Fatina I Fadel, Manal F Elshamaa, Dina Kandil, Doaa M Salah, Marwa M El-Sonbaty, Hebatallah Farouk, Mona Raafat, Soha Nasr
BACKGROUND: Klotho G-395-A gene polymorphism may impact children with end-stage renal disease (ESRD). We investigated the relevance of Klotho G-395-A on ESRD development and progression, and its relationship with evolution of cardiovascular complications in pediatric dialysis patients. METHODS: Fifty-five children with chronic kidney disease (CKD) and seventy healthy children were genotyped for Klotho G-395A. RESULTS: Incidence of GA/AA genotypes and A allele were higher in ESRD patients compared with controls (54...
January 8, 2018: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29308676/vitamin-d-protection-from-rat-diabetic-nephropathy-is-partly-mediated-through-klotho-expression-and-renin-angiotensin-inhibition
#4
Nashwa Eltablawy, Hend Ashour, Laila Ahmed Rashed, Wael Mostafa Hamza
OBJECTIVE: We hypothesised that vitamin D has a beneficial renal protective effect from diabetic nephropathy (DN). METHODS: Four rat groups were included: normal control (control), type 2 diabetes for eight weeks (DM), treated group with angiotensin receptor blocker losartan (DM + L), and vitamin D-treated group started from the onset of diabetes (DM + Vit D). RESULTS: In the both treated groups, we found a significant (p < ...
January 8, 2018: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29300914/local-klotho-enhances-neuronal-progenitor-proliferation-in-the-adult-hippocampus
#5
Felipe Salech, Lorena Varela-Nallar, Sebastián B Arredondo, Daniel B Bustamante, Gabriela A Andaur, Rodrigo Cisneros, Daniela P Ponce, Patricia Ayala, Nibaldo C Inestrosa, José L Valdés, María I Behrens, Andrés Couve
Klotho is an aging-related protein associated with hippocampal cognitive performance in mammals. Klotho regulates progenitor cell proliferation in non-neuronal tissues, but its role in adult hippocampal neurogenesis (AHN) has not been explored. Klotho expression in the adult mouse hippocampus was examined by immunofluorescence and PCR. AHN was evaluated in the hippocampus of klotho knock-out mice (KO), klotho KO/vitamin D-receptor mutant mice, and in a model of local klotho hippocampal knockdown. The recombinant Klotho effect on proliferation was measured in mouse-derived hippocampal neural progenitor cells...
December 30, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29285593/klotho-ameliorates-hydrogen-peroxide-induced-oxidative-injury-in-tcmk-1-cells
#6
Yue Shen, Yucheng Yan, Liming Lu, Yingying Qian, Xuejing Guan, Lulu Zhang, Yuanyuan Qi, Leyi Gu, Feng Ding
PURPOSE: Defects in Klotho gene expression in mice result in a vulnerability to oxidative injuries. We aimed to identify the expression of Klotho in a mouse tubular epithelial (TCMK-1) cell line, and also to investigate changes in Klotho expression induced by oxidative stress and the potential role of intra- and extracellular Klotho protein. METHODS: During exposure to hydrogen peroxide (H2O2), an overexpression of the Klotho gene was induced and exogenous Klotho protein was added in TCMK-1 cells...
December 28, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/29274997/electroconvulsive-therapy-enhances-the-anti-ageing-hormone-klotho-in-the-cerebrospinal-fluid-of-geriatric-patients-with-major-depression
#7
Carolin Hoyer, Alexander Sartorius, Suna Su Aksay, Jan Malte Bumb, Christoph Janke, Manfred Thiel, Dieter Haffner, Maren Leifheit-Nestler, Laura Kranaster
Klotho is a humoral factor with pleiotropic effects. Most notably, Klotho deficiency is associated with a phenotype comprising organ manifestations accompanying aging including atherosclerosis and cognitive impairment. Research on the role of Klotho in affective disorder is scarce, which is surprising in light of the fact that depression is associated with accelerated cellular aging as well as aging-related phenotypes and comorbidity observed in Klotho deficiency. On these grounds we investigated Klotho levels in the cerebrospinal fluid (CSF) and serum of eight geriatric patients undergoing electroconvulsive therapy (ECT) for severe depression...
December 20, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29273504/fibroblast-growth-factor-21-ameliorates-vascular-calcification-by-inhibiting-osteogenic-transition-in-vitamin-d3-plus-nicotine-treated-rats
#8
Yuchen Shi, Weiwei Lu, Yuelong Hou, Kun Fu, Feng Gan, Jinghua Liu
FGF21, a special member of FGF superfamily, has been proven to have pleiotropic metabolic effects and many potential therapeutic action in various metabolic disorders. Vascular calcification (VC), a perplexing clinical issue, is a major risk factor for many cardiovascular diseases, especially for patients with some metabolic diseases. However, the role of FGF21 on VC in vivo remains unclear. Thus, in this study, we observed the effect and mechanism of FGF21 on VC induced by vitamin D3 plus nicotine (VDN) treated rats...
December 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29250136/%C3%AE-klotho-and-anemia-in-patients-with-chronic-kidney-disease-patients-a-new-perspective
#9
Yang Xu, Hao Peng, Ben Ke
Normocytic normochromic anemia is a common complication of chronic kidney disease (CKD) and is associated with numerous adverse consequences. Certain symptoms previously attributed to CKD are now known to be a consequence of anemia. Anemia contributes to an increased cardiac output, and the development of left ventricular hypertrophy, angina and congestive heart failure, leading to high morbidity and mortality in patients with CKD. The multifunctional α-klotho (KL) protein, which is predominantly expressed in the kidneys, is associated with the occurrence of anemia in patients with CKD...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29250031/new-insights-into-the-mechanism-of-action-of-soluble-klotho
#10
REVIEW
George D Dalton, Jian Xie, Sung-Wan An, Chou-Long Huang
The klotho gene encodes a type I single-pass transmembrane protein that contains a large extracellular domain, a membrane spanning segment, and a short intracellular domain. Klotho protein exists in several forms including the full-length membrane form (mKl) and a soluble circulating form [soluble klotho (sKl)]. mKl complexes with fibroblast growth factor receptors to form coreceptors for FGF23, which allows it to participate in FGF23-mediated signal transduction and regulation of phosphate and calcium homeostasis...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29247834/the-kl-vs-polymorphism-of-klotho-gene-is-protective-against-retinopathy-incidence-in-patients-with-type-1-diabetes
#11
Bartosz Słomiński, Monika Ryba-Stanisławowska, Maria Skrzypkowska, Jolanta Myśliwska, Małgorzata Myśliwiec
BACKGROUND AND AIMS: KLOTHO is an anti-ageing circulating hormone involved in insulin signaling, inflammation and vascular homeostasis through its protective effects on the endothelium and antioxidant actions. The common functional "KL-VS" variant of the KLOTHO gene is reproducibly associated with longevity in humans. Large number of studies have evaluated close relationship between KLOTHO protein and diabetes but the association between KL-VS variant and retinopathy in type 1 diabetes mellitus (T1D) is unknown...
December 13, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29233659/klotho-upregulation-contributes-to-the-neuroprotection-of-ligustilide-against-cerebral-ischemic-injury-in-mice
#12
Fang-Yi Long, Men-Qi Shi, Hong-Jing Zhou, Dong-Ling Liu, Na Sang, Jun-Rong Du
Klotho, an aging-suppressor gene, encodes a protein that potentially acts as a neuroprotective factor. Our previous studies showed that ligustilide minimizes the cognitive dysfunction and brain damage induced by cerebral ischemia; however, the underlying mechanisms remain unclear. This study aims to investigate whether klotho is involved in the protective effects of ligustilide against cerebral ischemic injury in mice. Cerebral ischemia was induced by bilateral common carotid arterial occlusion. Neurobehavioral tests as well as Nissl and Fluoro-Jade B staining were used to evaluate the protective effects of ligustilide in cerebral ischemia, and Western blotting and ELISA approaches were used to investigate the underlying mechanisms...
December 9, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29226737/pseudoxanthoma-elasticum-like-in-%C3%AE-thalassemia-major-a-matter-of-%C3%AE-klotho-and-parathyroid-hormone
#13
Alessandro Baldan, Andrea Giusti, Cristina Bosi, Cristina Malaventura, Gianluca Forni, Caterina Borgna-Pignatti
Pseudoxanthoma elasticum-like (PXL) condition is one of the complications faced by patients with β-thalassemia major (β-TM). Histopathological features include abnormal, mineralized and fragmented elastic fibers in skin, eyes and arterial blood vessels (elastorrhexia). The pathogenesis of PXL lesions in β-TM is not yet completely understood. This study was aimed at analyzing a possible implication of α-Klotho in the clinical manifestation of PXL in patients with β-TM (30 with and 78 without PXL). A significant correlation was observed between Klotho, parathyroid hormone (PTH) and serum calcium (Ca)...
December 11, 2017: Hemoglobin
https://www.readbyqxmd.com/read/29226550/alpha-klotho-enrichment-in-induced-pluripotent-stem-cell-secretome-contributes-to-antioxidative-protection-in-acute-lung-injury
#14
Amiq Gazdhar, Priya Ravikumar, Johanne Pastor, Manfred Heller, Jianfeng Ye, Jianning Zhang, Orson W Moe, Thomas Geiser, Connie C W Hsia
Induced pluripotent stem cells (iPSCs) has been reported to alleviate organ injury, although the mechanisms of action remain unclear and administration of intact cells faces many limitations. We hypothesized that cell-free conditioned media (CM) containing the secretome of iPSCs possess antioxidative constituents that can alleviate pulmonary oxidant stress damage. We derived iPSCs from human dermal fibroblasts and harvested the CM. Addition of iPSC CM to cultured human alveolar type-1 epithelial cells mitigated hyperoxia-induced depletion of endogenous total antioxidant capacity (TAC) while tracheal instillation of iPSC CM into adult rat lungs enhanced hyperoxia-induced increase in TAC...
December 11, 2017: Stem Cells
https://www.readbyqxmd.com/read/29221940/pioglitazone-attenuates-aging-related-disorders-in-aged-apolipoprotein-e-deficient-mice
#15
Dan Shen, Hao Li, Rui Zhou, Meng-Jie Liu, Hong Yu, Dong-Fang Wu
Pioglitazone (Piog) activates peroxisome proliferator activated receptor-γ (PPARγ) and is widely used in clinic for the treatment of diabetes mellitus. PPARγ in various tissues has the essential regulatory role of multiple metabolic function, suggest that PPARγ signaling may contribute to aging processes. However, little is known about the consequences of Piog on aging in aged animal models. We used apolipoprotein E deficient (apoE-/-) mice model to evaluate the effects of Piog on aging-related disorders...
December 5, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29205878/exosome-modified-tissue-engineered-blood-vessel-for-endothelial-progenitor-cell-capture-and-targeted-sirna-delivery
#16
Wen Chen, Mingcan Yang, Jian Bai, Xiang Li, Xiangrui Kong, Yu Gao, Lili Bi, Li Xiao, Bingyi Shi
Instability and poor targeting causes the long-term patency of RNA-modified tissue engineering blood vessels (TEBVs) remaining unsatisfactory. RNA can be enriched in exosome and then delivered into targeted cells while whether exosome-modified TEBVs achieve RNA targeted delivery is unclear. Here, to promote the expression of klotho protein on the mesenchymal stem cell (MSC)-derived exosomes, klotho plasmids are first transfected into MSCs, and adenosine kinase (ADK) siRNA is then loaded into exosome (klotho/ADK siRNA-exosome) using electrotransfection...
December 4, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29197521/high-phosphate-induced-downregulation-of-ppar%C3%AE-contributes-to-ckd-associated-vascular-calcification
#17
Liang Liu, Yong Liu, Ying Zhang, Xianjin Bi, Ling Nie, Chi Liu, Jiachuan Xiong, Ting He, Xinlin Xu, Yanlin Yu, Ke Yang, Jun Gu, Yunjian Huang, Jingbo Zhang, Zhiren Zhang, Bo Zhang, Jinghong Zhao
Medial arterial calcification associated with hyperphosphatemia is a main cause of cardiovascular mortality in patients with chronic kidney disease (CKD), but the mechanisms underlying high phosphate-induced vascular calcification remain largely unknown. Here, we observed a significant decrease in the expression of peroxisome proliferator-activated receptor-gamma (PPARγ) in calcified arteries both in CKD patients and in a mouse model of CKD with hyperphosphatemia. In vitro, high phosphate treatment led to a decreased expression of PPARγ in mouse vascular smooth muscle cells (VMSCs), accompanied by apparent osteogenic differentiation and calcification...
November 29, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29195509/dpp-4-inhibition-with-linagliptin-ameliorates-the-progression-of-premature-aging-in-klotho-mice
#18
Yu Hasegawa, Kenyu Hayashi, Yushin Takemoto, Cao Cheng, Koki Takane, Bowen Lin, Yoshihiro Komohara, Shokei Kim-Mitsuyama
BACKGROUND: The potential of anti-aging effect of DPP-4 inhibitors is unknown. This study was performed to determine whether linagliptin, a DPP-4 inhibitor, could protect against premature aging in klotho-/- mice. METHODS: Klotho-/- mice exhibit multiple phenotypes resembling human premature aging, including extremely shortened life span, cognitive impairment, hippocampal neurodegeneration, hair loss, muscle atrophy, hypoglycemia, etc. To investigate the effect of linagliptin on these aging-related phenotypes, male klotho-/- mice were divided into two groups: (1) control group fed the standard diet, and (2) linagliptin group fed the standard diet containing linagliptin...
December 1, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29190606/association-between-klotho-gene-polymorphism-and-markers-of-bone-metabolism-in-patients-receiving-maintenance-hemodialysis-in-iran
#19
Aboalfazl Nazarian, Meisam Hasankhani, Monireh Aghajany-Nasab, Ali Monfared
INTRODUCTION: Some genetic variations of Klotho have been reported as a risk factor for calcification and hyperphosphatemia in chronic kidney disease. Klotho polymorphism is also associated with outcome in patients receiving hemodialysis. This study aimed to evaluate the relationship between Klotho single nucleotide polymorphism (SNP) and bone metabolism as an early prognostic measure for chronic kidney disease.   Materials and Methods. Sixty patients receiving hemodialysis and 60 age-matched controls were enrolled in the study of the assessment of 2 types of Klotho polymorphism (G395A and C1818T)...
November 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/29187373/klotho-activin-a-in-kidney-injury-plasma-klotho-is-maintained-in-unilateral-obstruction-despite-no-upregulation-of-klotho-biosynthesis-in-contralateral-kidney
#20
Anders Nordholm, Maria L Mace, Eva Gravesen, Jacob Hofman-Bang, Marya Morevati, Klaus Olgaard, Ewa Lewin
In a new paradigm of etiology related to Chronic Kidney Disease-Mineral and Bone Disorder (CKD-MBD) kidney injury may cause induction of factors in the injured kidney that are released into the circulation and thereby initiate and maintain renal fibrosis and CKD-MBD. Klotho is believed to ameliorate renal fibrosis and CKD-MBD, while ActivinA might have detrimental effects. The unilateral ureter obstruction (UUO) model is used here to examine this concept by investigating early changes related to renal fibrosis in obstructed kidney, untouched contralateral kidney and vasculature, which might be affected by secreted factors from the obstructed kidney, and compared to unilateral nephrectomized controls (UNX)...
November 29, 2017: American Journal of Physiology. Renal Physiology
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