HCSGD entry for KL


1. General information

Official gene symbolKL
Entrez ID9365
Gene full nameklotho
Other gene symbols
Links to Entrez GeneLinks to Entrez Gene

2. Neighbors in the network

color bar

3. Gene ontology annotation

GO ID

GO term

Evidence

Category

GO:0002526Acute inflammatory responseIEAbiological_process
GO:0004553Hydrolase activity, hydrolyzing O-glycosyl compoundsIEAmolecular_function
GO:0004566Beta-glucuronidase activityIEAmolecular_function
GO:0004871Signal transducer activityIEAmolecular_function
GO:0005104Fibroblast growth factor receptor bindingIEAmolecular_function
GO:0005179Hormone activityIEAmolecular_function
GO:0005499Vitamin D bindingIEAmolecular_function
GO:0005576Extracellular regionTAScellular_component
GO:0005615Extracellular spaceIEA TAScellular_component
GO:0005886Plasma membraneTAScellular_component
GO:0005887Integral component of plasma membraneTAScellular_component
GO:0005975Carbohydrate metabolic processIEAbiological_process
GO:0006112Energy reserve metabolic processIEAbiological_process
GO:0007173Epidermal growth factor receptor signaling pathwayTASbiological_process
GO:0007568AgingIEA IMPbiological_process
GO:0008286Insulin receptor signaling pathwayIEA TASbiological_process
GO:0008422Beta-glucosidase activityTASmolecular_function
GO:0008543Fibroblast growth factor receptor signaling pathwayIEA TASbiological_process
GO:0016021Integral component of membraneIEA TAScellular_component
GO:0017134Fibroblast growth factor bindingIPImolecular_function
GO:0030501Positive regulation of bone mineralizationIMPbiological_process
GO:0038095Fc-epsilon receptor signaling pathwayTASbiological_process
GO:0045087Innate immune responseTASbiological_process
GO:0048011Neurotrophin TRK receptor signaling pathwayTASbiological_process
GO:0048015Phosphatidylinositol-mediated signalingTASbiological_process
GO:0055074Calcium ion homeostasisIEAbiological_process
GO:0090080Positive regulation of MAPKKK cascade by fibroblast growth factor receptor signaling pathwayIEAbiological_process
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4. Expression levels in datasets

  • Meta-analysis result

p-value upp-value downFDR upFDR down
0.56256136540.58918945710.99999024731.0000000000

  • Individual experiment result
    ( "-" represent NA in the specific microarray platform )

Data sourceUp or downLog fold change
GSE11954Up0.3423277217
GSE13712_SHEARUp0.0735581315
GSE13712_STATICUp0.2789105281
GSE19018Up0.3329431959
GSE19899_A1Down-0.0758368733
GSE19899_A2Down-0.2244342032
PubMed_21979375_A1Down-0.0981635980
PubMed_21979375_A2Up0.1996644046
GSE35957Down-0.0901321664
GSE36640Up0.1814381707
GSE54402Down-0.1774372803
GSE9593Down-0.2911364817
GSE43922Up0.0116557312
GSE24585Up0.1023377660
GSE37065Up0.0563901387
GSE28863_A1Down-0.2670628004
GSE28863_A2Down-0.0440865301
GSE28863_A3Up0.0693890302
GSE28863_A4Up0.0822346741
GSE48662Down-0.0753209806

5. Regulation relationships with compounds/drugs/microRNAs

  • Compounds

Not regulated by compounds

  • Drugs

Not regulated by drugs

  • MicroRNAs

  • mirTarBase

MiRNA_name

mirBase ID

miRTarBase ID

Experiment

Support type

References (Pubmed ID)

hsa-miR-335-5pMIMAT0000765MIRT019099MicroarrayFunctional MTI (Weak)18185580
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  • mirRecord
No target information from mirRecord

6. Text-mining results about the gene

Gene occurances in abstracts of cellular senescence-associated articles: 35 abstracts the gene occurs.


PubMed ID of the article

Sentenece the gene occurs

278853322,3,5,4'-Tetrahydroxystilbene-2-O-beta-D-glucoside Promotes Expression of the Longevity Gene Klotho
27885332The longevity gene klotho has numerous physiological functions, such as regulating calcium and phosphorus levels, delaying senescence, improving cognition, reducing oxidative stress, and protecting vascular endothelial cells
27885332Our results showed that THSG dose-dependently increased the luciferase reporter activity of the klotho gene, reversed the decrease in mRNA and protein expression of klotho which was induced by angiotensin II in NRK-52E renal tubular epithelial cells, and increased klotho mRNA expression in the cerebral cortex, hippocampus, testis, and kidney medulla of spontaneously hypertensive rats
27885332Based on klotho's role in promoting cognition, regulating bone metabolism, and improving renal function, the effect of THSG on klotho expression will be beneficial to the functional improvement or enhancement of the expressed organs or tissues
27313833Corrigendum to "Glucose Oxidase Induces Cellular Senescence in Immortal Renal Cells through ILK by Downregulating Klotho Gene Expression"
27125746Alpha-Klotho (alphaKlotho) protein is encoded by the gene, Klotho, and functions as a coreceptor for endocrine fibroblast growth factor-23
26797283The MSCs expressed FGF receptors (1 through 4) and angiotensin-II type 1 receptor, but no traces of the Klotho gene were detected
26583057Glucose Oxidase Induces Cellular Senescence in Immortal Renal Cells through ILK by Downregulating Klotho Gene Expression
26583057In this work, we were searching for novel intermediaries in oxidative stress-induced senescence, focusing our interest on integrin-linked kinase (ILK), a scaffold protein at cell-extracellular matrix (ECM) adhesion sites, and on the Klotho gene
26583057Additionally, GOx reduced Klotho gene expression and cells overexpressing Klotho protein did not undergo senescence after GOx addition
26583057We demonstrated a direct link between ILK and Klotho since silencing ILK expression in cells and mice increases Klotho expression and reduces p53 and p16 expression in renal cortex
26583057In conclusion, oxidative stress induces cellular senescence in kidney cells by increasing ILK protein expression and activity, which in turn reduces Klotho expression
26583057We hereby present ILK as a novel downregulator of Klotho gene expression
26528423Biological Role of Anti-aging Protein Klotho
26528423Klotho-deficient mice have accelerated aging phenotypes, whereas overexpression of Klotho in mice extends lifespan
26528423Klotho is an anti-aging single-pass membrane protein predominantly produced in the kidney, with shedding of the amino-terminal extracellular domain into the systemic circulation
26528423Circulating levels of soluble Klotho decrease with age, and the klotho gene is associated with increased risk of age-related diseases
26528423The three forms of Klotho protein have distinct functions
26528423Membrane Klotho forms a complex with fibroblast growth factor (FGF) receptors, functions as an obligatory co-receptor for FGF23, which is involved in aging and the development of chronic diseases via regulation of P i and vitamin D metabolism
26528423Secreted Klotho functions as a humoral factor with pleiotropic activities including regulation of oxidative stress, growth factor signaling, and ion homeostasis
26528423Secreted Klotho is also involved in organ protection
26528423Herein we provide a brief overview of the structure and function and recent research about Klotho
26346243Klotho, stem cells, and aging
26346243Klotho is an antiaging gene encoding a single-pass transmembrane protein, klotho, which serves as an aging suppressor through a wide variety of mechanisms, such as antioxidation, antisenescence, antiautophagy, and modulation of many signaling pathways, including insulin-like growth factor and Wnt
26346243Klotho deficiency activates Wnt expression and activity contributing to senescence and depletion of stem cells, which consequently triggers tissue atrophy and fibrosis
26346243In contrast, the klotho protein was shown to suppress Wnt-signaling transduction, and inhibit cell senescence and preserve stem cells
26346243A better understanding of the potential effects of klotho on stem cells could offer novel insights into the cellular and molecular mechanisms of klotho deficiency-related aging and disease
26346243The klotho protein may be a promising therapeutic agent for aging and aging-related disorders
26100223Soluble extracellular Klotho decreases sensitivity to cigarette smoke induced cell death in human lung epithelial cells
26100223The anti-aging gene, klotho, encodes a membrane bound protein that has been shown to be a key regulator of oxidative stress and cellular senescence
26100223In this study the role of Klotho (KL) with regard to oxidative stress and cellular senescence was investigated in human pulmonary epithelial cells exposed to cigarette smoke
26100223Individual clones that stably overexpress Klotho were generated through retroviral transfection and geneticin selection
26100223Klotho overexpression was confirmed through RT-qPCR, Western blotting and ELISA
26100223Compared to control cells, constitutive Klotho overexpression resulted in decreased sensitivity to cigarette smoke induced cell death in vitro via a reduction of reactive oxygen species and a decrease in the expression of p21
25923845Ablation of the p16(INK4a) tumour suppressor reverses ageing phenotypes of klotho mice
25614163There is also a reduction in anti-ageing molecules, such as sirtuins and Klotho, which further accelerates the ageing process
25246106Klotho Prevents NFkappaB Translocation and Protects Endothelial Cell From Senescence Induced by Uremia
25246106Klotho protein is a beta-glucuronidase capable of hydrolyzing steroid beta-glucuronides
25246106The aim of the study was to investigate how senescence and oxidative stress induced by uremia in endothelial cells affects Klotho expression and whether intra or extracellular Klotho has effects on the response of these cells
25246106The expression of Klotho decreased with the uremia and preceded the manifestations of cell aging
25246106Levels of intracellular Klotho decreases associated to endothelial senescence, and exogenous Klotho prevents cellular senescence by inhibiting the increase in oxidative stress induced by uremia and diminished the nuclear factor kappa B-DNA binding ability
24778222PAI-1-regulated extracellular proteolysis governs senescence and survival in Klotho mice
24778222Klotho functions as an aging-suppressor gene, and Klotho-deficient (kl/kl) mice exhibit an accelerated aging-like phenotype that includes a truncated lifespan, arteriosclerosis, and emphysema
23666415FGF23 and Klotho in chronic kidney disease
23666415PURPOSE OF REVIEW: The wealth of data regarding fibroblast growth factor-23 (FGF23) and Klotho in chronic kidney disease (CKD) has risen exponentially over the past decade
23666415Identification of contributing stimuli to the rise in FGF23 is fundamental and recent evidence suggest a multifactorial cause which entails perturbed osteocyte function and renal mechanisms such as Klotho deficiency and, somewhat paradoxically, systemic Klotho excess
23666415Conversely, tissue level of the FGF23 coreceptor Klotho declines in early CKD and this deficiency is linked to accelerated ageing, cellular senescence, vascular calcification, oxidative stress and renal fibrosis
23666415At present, methodological difficulties limit the utility of soluble Klotho measurements
23666415Animal proof-of-concept studies have demonstrated beneficial effects of Klotho delivery in CKD, whereas anti-FGF23 therapy using neutralizing antibodies improved biochemical and bone parameters at the expense of increased vascular calcification and mortality
23357108This occurs through several mechanisms, including DNA and mitochondria damage, increased reactive oxygen species generation, persistent inflammation, stem cell exhaustion, phosphate toxicity, decreased klotho expression, and telomere attrition
23357108Because recent evidence suggests that both increased local signaling of growth factors (through the nutrient-sensing mammalian target of rapamycin) and decreased klotho expression are important modulators of aging, interventions that target these should be tested in this prematurely aged population
23041151The secreted Klotho protein restores phosphate retention and suppresses accelerated aging in Klotho mutant mice
23041151Klotho was identified as the responsible gene in a mutant mouse line whose disruption results in a variety of premature aging-related phenotypes
23041151Furthermore, transgenic overexpression of klotho in mice extends their life span through inhibition of insulin and IGF1 signaling
23041151We found that intraperitoneal injection of recombinant soluble Klotho protein at dose of 0
23041151Soluble Klotho administration also ameliorated premature aging-related phenotype, such as growth retardation, premature thymus involution and vascular calcification, and effectively enhanced urinary phosphate excretion in kl/kl mice
23041151Klotho treatment attenuated renal fibrosis through down-regulation of transforming growth factor-beta signaling as well as reduced cellular senescence through down-regulation of p21-cip1 mRNA levels
23041151In addition, soluble Klotho treatment significantly reduced both renal and aorta calcium deposits
23041151In conclusion, our study shows the therapeutic potential of soluble Klotho protein to treat age-related disorders in mice
23000105Klotho modulates the stress response in human senescent endothelial cells
23000105Lack of Klotho expression in mice leads to premature aging and age-related diseases, including vascular diseases
23000105The aim of this study was to determine how endothelial cell line senescence affects Klotho expression and whether intra- or extracellular Klotho has any effect on the response of senescent cells to oxidative stress
23000105The decline in Klotho preceded the manifestations of cell ageing: telomere shortening and beta-galactosidase expression
23000105Klotho was also reduced in cells exposed to the proinflammatory cytokine TNFalpha
23000105The addition of exogenous Klotho to aging cells did not modify the proportion of cells with short telomeres or any other feature of cell aging; however, exogenous Klotho prevented the changes resembling premature cellular senescence associated with TNFalpha, such as the decrease in telomere length and the increase in beta-galactosidase-positive cells
23000105Likewise exogenous Klotho prevented the increases in reactive oxygen species (ROS) activity, mitochondrial potential and cell apoptosis induced by TNFalpha
222421931,25-dihydroxyvitamin D3 (1,25D3) was reported to induce premature organismal aging in fibroblast growth factor-23 (Fgf23) and klotho deficient mice, which is of main interest as 1,25D3 supplementation of its precursor cholecalciferol is used in basic osteoporosis treatment
22200425Administration of indoxyl sulfate to hypertensive rats reduces renal expression of Klotho and promotes cell senescence, with expression of senescence-associated beta-galactosidase, p53, p21, p16, and retinoblastoma protein, accompanied by kidney fibrosis
22200425Indoxyl sulfate downregulates Klotho expression in the kidneys through production of ROS and activation of nuclear factor kappa B in proximal tubular cells
21965376Young-to-old mice also exhibited higher expression of the anti-aging gene Klotho and less phosphorylation of IGF-1 receptor beta
21518171Klotho protein diminishes endothelial apoptosis and senescence via a mitogen-activated kinase pathway
21518171AIM: Mice that carry the Klotho mutation (KL(-) (/) (-) ) manifest diverse age-related disorders similar to those observed in humans
21518171Thus, the Klotho protein might function as an anti-aging hormone in mammals
21518171Recently, we reported that Klotho recombinant protein attenuated apoptosis and cellular senescence in endothelial cells, but the mechanism remained unclear
21518171Here, we designed an in vitro study to test whether inhibitors of extracellular signal-regulated kinase and mitogen-activated kinase kinase could affect Klotho regulation of apoptosis and cellular senescence
21518171METHODS: Cellular senescence was investigated in human umbilical vein endothelial cells treated with or without Klotho recombinant protein, and with or without inhibitors of mitogen-activated kinases
21518171RESULTS: The Klotho recombinant protein induced transient phosphorylation of mitogen-activated kinases within a few minutes
21518171Application of inhibitors of mitogen-activated kinases attenuated the ability of Klotho to interfere with apoptosis and senescence in endothelial cells
21358327SUMMARY: Here we review recent advances in understanding the role of Klotho, sirtuins, cell senescence through oxidative stress and mitochondrial dysfunction, as well as of the renin-angiotensin system in modulating age-related kidney damage
21336305Klotho has been associated with ageing
21336305We show here that the intracellular, but not the secreted, form of klotho interacts with RIG-I and that this interaction inhibits RIG-I-induced expression of IL-6 and IL-8 both in vitro and in vivo
21336305Our study uncovers a mechanism in which klotho functions as an anti-ageing factor through the suppression of RIG-I-mediated inflammation
21235497This review discusses the molecular mechanisms of cellular senescence and its affect on calcification of vascular cells, the relevance of phosphate regulation and the function of FGF23 and Klotho proteins
21195930Indoxyl sulfate reduces klotho expression and promotes senescence in the kidneys of hypertensive rats
21195930Klotho, an anti-aging gene, is expressed in the kidneys, and its renal expression is decreased in chronic kidney disease
21195930This study aimed to clarify whether indoxyl sulfate could reduce klotho expression and contribute to cell senescence in the kidneys of hypertensive rats
21195930Further, DN + IS rats showed decreased expression of klotho as compared with DN rats
20832068Calcitonin gene-related peptide inhibits angiotensin II-induced endothelial progenitor cells senescence through up-regulation of klotho expression
20716932Reactive oxygen species and age-related genes p66shc, Sirtuin, FOX03 and Klotho in senescence
20716932Aging-regulating genes p66shc, Sirtuin, FOXO3a and Klotho are new important factors which are stimulated by ROS signaling
19955715An oral sorbent, AST-120, increases Klotho expression and inhibits cell senescence in the kidney of uremic rats
19797472Underlying mechanisms included increased expression of klotho, decreased systemic and renal oxidative stress, and decreased mitochondrial injury
19749165Furthermore, immunohistochemistry of aorta from the klotho(-/-) aging mouse model demonstrated in vivo emergence of osteoblast-like cells expressing RUNX-2 exclusively in the calcified media
17690294We explored this concept in the Klotho mouse model of accelerated aging
17690294Analysis of various tissues and organs from young Klotho mice revealed a decrease in stem cell number and an increase in progenitor cell senescence
17690294Because klotho is a secreted protein, we postulated that klotho might interact with other soluble mediators of stem cells
17690294We found that klotho bound to various Wnt family members
17690294Tissues and organs from klotho-deficient animals showed evidence of increased Wnt signaling, and ectopic expression of klotho antagonized the activity of endogenous and exogenous Wnt
17690294Thus, klotho appears to be a secreted Wnt antagonist and Wnt proteins have an unexpected role in mammalian aging
17202338Here we show that KLOTHO, a beta-glucuronidase gene whose activity changes are associated with aging phenotype, is down-regulated at the mRNA, protein, and enzymatic (beta-glucuronidase) activity levels both in the healthy elderly and especially in RA CD4(+) lymphocytes
17202338Although the exact role of Klotho activity for CD4(+) cell function is unknown, we propose here that it might be involved in anti-inflammatory processes occurring in the young and healthy individuals, but reduced in both healthy elderly and RA patients
17202338To support this hypothesis, we show here that the reduction of Klotho expression and activity in both elderly and patients' lymphocytes occurs in concert with the down-regulation of T cell costimulatory molecule CD28, the latter known to be dependent on increased levels of TNF-alpha
17202338Thus, a common mechanism of KLOTHO down-regulation, but executed at various times in life, may underlie both physiological and disease-related T cell aging
17202338Klotho activity might become a target of anti-RA drug development as well as a tool to help increase the immune system efficiency in the elderly
17014852Klotho RNAi induces premature senescence of human cells via a p53/p21 dependent pathway
17014852Klotho has recently emerged as a regulator of aging
17014852To investigate the role of Klotho in the regulation of cellular senescence, we generated stable MRC-5 human primary fibroblast cells knockdown for Klotho expression by RNAi
17014852Downregulation of Klotho dramatically induces premature senescence with a concomitant upregulation of p21
17014852Knockdown of p53 in the Klotho attenuated MRC-5 cells restores normal growth and replicative potential
17014852These results demonstrate that Klotho normally regulates cellular senescence by repressing the p53/p21 pathway
17014852Our findings implicate Klotho as a regulator of aging in primary human fibroblasts
16325773Anti-apoptotic and anti-senescence effects of Klotho on vascular endothelial cells
16325773A recent study suggested that Klotho protein might function as an anti-aging hormone in mammals
16325773Klotho overexpression decreased H(2)O(2)-induced apoptosis in COS-1 cells and Jurkat cells
16325773Klotho protein also reduced H(2)O(2)- and etoposide-induced apoptosis in HUVEC
16325773Senescence-associated beta-gal staining showed that Klotho protein interferes with H(2)O(2)-induced premature cellular senescence
16325773Our study suggests that Klotho acts as a humoral factor to reduce H(2)O(2)-induced apoptosis and cellular senescence in vascular cells
15339392Establishment of a cell-based assay to screen regulators for Klotho gene promoter
15339392AIM: To discover compounds which can regulate Klotho promoter activity
15339392Klotho is an aging suppressor gene
15339392A defect in Klotho gene expression in the mouse results in the phenotype similar to human aging
15339392Recombinant Klotho protein improves age-associated diseases in animal models
15339392It has been proposed that up-regulation of Klotho gene expression may have anti-aging effects
15339392METHODS: Klotho promoter was cloned into a vector containing luciferase gene, and the reporter gene vector was transfected into HEK293 cells to make a stable cell line (HEK293/KL)
15339392The luciferase activity was detected to identify compounds that can regulate Klotho promoter
15339392RESULTS: The expression of luciferase in these cells was under control of Klotho promoter and down-regulated after H2O2 treatment
15339392This result demonstrated that the Klotho gene promoter was regulated by oxidative stress
15339392Using the cell-based reporter gene assay, we screened natural product extracts for regulation of Klotho gene promoter
15339392Several extracts were identified that could rescue the H2O2 effects and up-regulated Klotho promoter activity
15339392CONCLUSION: A cell -based assay for high-throughput drug screening was established to identify compounds that regulate Klotho promoter activity, and several hits were discovered from natural products
15339392Further characterization of these active extracts could help to investigate Klotho function and aging mechanisms
14653227Klotho is a recently identified gene that is a very different type from those involved in previously described premature-aging syndromes and cell senescence
14653227Although a high level of expression of the klotho gene was detected in the kidney and brain, little is known about the function of the klotho gene in the brain
14653227Here we investigated the changes in mnemonic function accompanying aging in klotho mutant mice
14653227Cognitive function measured by novel-object recognition and conditioned-fear tests in klotho mutant mice was normal at the age of 6 weeks, but markedly impaired at the age of 7 weeks
14653227Lipid peroxide (malondialdehyde) and DNA peroxide (8-hydroxy-2'-deoxyguanosine) levels in the hippocampus of klotho mutant mice increased at the age of 5 weeks, 2 weeks prior to the development of cognition deficits
14653227Pro-death Bax increased, while anti-death Bcl-2 and Bcl-XL decreased, and apoptotic TUNEL-positive cells were detected in the hippocampus of klotho mutant mice at the age of 7 weeks
14653227A potent antioxidant alpha-tocopherol prevented the cognition impairment and lipid peroxide accumulation, and decreased the number of apoptotic cells in klotho mutant mice
14653227These results suggest that oxidative stress has a crucial role in the aging-associated cognition impairment in klotho mutant mice
14653227Klotho protein may be involved in the regulation of antioxidative defense
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