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skin senescence

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https://www.readbyqxmd.com/read/30471052/tspyl5-mediated-inhibition-of-p53-promotes-human-endothelial-cell-function
#1
Hee-Jun Na, Chung Eun Yeum, Han-Seop Kim, Jungwoon Lee, Jae Yun Kim, Yee Sook Cho
Testis-specific protein, Y-encoded like (TSPYL) family proteins (TSPYL1-6), which are members of the nucleosome assembly protein superfamily, have been determined to be involved in the regulation of various cellular functions. However, the potential role of TSPYL family proteins in endothelial cells (ECs) has not been determined. Here, we demonstrated that the expression of TSPYL5 is highly enriched in human ECs such as human umbilical vein endothelial cells (HUVECs) and human pluripotent stem cell-differentiated ECs (hPSC-ECs)...
November 23, 2018: Angiogenesis
https://www.readbyqxmd.com/read/30462359/the-bystander-effect-contributes-to-the-accumulation-of-senescent-cells-in-vivo
#2
Paulo F L da Silva, Mikolaj Ogrodnik, Olena Kucheryavenko, Julien Glibert, Satomi Miwa, Kerry Cameron, Abbas Ishaq, Gabriele Saretzki, Sushma Nagaraja-Grellscheid, Glyn Nelson, Thomas von Zglinicki
Senescent cells accumulate with age in multiple tissues and may cause age-associated disease and functional decline. In vitro, senescent cells induce senescence in bystander cells. To see how important this bystander effect may be for accumulation of senescent cells in vivo, we xenotransplanted senescent cells into skeletal muscle and skin of immunocompromised NSG mice. 3 weeks after the last transplantation, mouse dermal fibroblasts and myofibres displayed multiple senescence markers in the vicinity of transplanted senescent cells, but not where non-senescent or no cells were injected...
November 21, 2018: Aging Cell
https://www.readbyqxmd.com/read/30444781/effects-of-ultraviolet-irradiation-on-cellular-senescence-in-keratinocytes-versus-fibroblasts
#3
Kyung-Chul Moon, Jong-Phil Yang, Jae-Sun Lee, Seong-Ho Jeong, Eun-Sang Dhong, Seung-Kyu Han
Aging is a biologic process characterized by time-dependent functional declines that are influenced by oxidative stress-induced inflammatory reactions. In particular, ultraviolet (UV) irradiation plays a key role in cellular senescence in photo-aged skin. However, the cellular senescence of epidermal keratinocytes and dermal fibroblasts by UV irradiation may differ depending on the exposure time and dosage of UV irradiation. Therefore, the purpose of the study was to evaluate and compare the effects of UV irradiation on cellular senescence in human epidermal keratinocytes (HaCaT) and human dermal fibroblasts (HDFs)...
November 15, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/30405877/modulation-of-oxidative-status-by-normoxia-and-hypoxia-on-cultures-of-human-dermal-fibroblasts-how-does-it-affect-cell-aging
#4
Elisabetta Damiani, Francesca Brugè, Ilenia Cirilli, Fabio Marcheggiani, Fabiola Olivieri, Tatiana Armeni, Laura Cianfruglia, Angelica Giuliani, Patrick Orlando, Luca Tiano
Reactive oxygen species (ROS) production in the skin is among the highest compared to other organs, and a clear correlation exists between ROS production and skin aging. Many attempts are underway to reduce oxidative stress in the skin by topical treatment or supplementation with antioxidants/cosmeceuticals, and cultures of human dermal fibroblasts (HDF) are widely used for these studies. Here, we examined the influence of oxygen tension on cell aging in HDF and how this impacted ROS production, the enzymatic and nonenzymatic antioxidant response system, and the efficacy of this defense system in limiting DNA damage and in modulating gene expression of proteins involved in the extracellular matrix, linked to skin aging...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/30402942/nuclear-abnormalities-in-vascular-myocytes-in-cerebral-autosomal-dominant-arteriopathy-with-subcortical-infarcts-and-leukoencephalopathy-cadasil
#5
Dorota Dziewulska, Ewelina Nycz, Cecylia Rajczewska-Oleszkiewicz, Jacek Bojakowski, Dorota Sulejczak
Cerebral autosomal-dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is a stroke and dementia syndrome with degeneration and loss of vascular smooth muscle cells (VSMCs). The disease is due to mutations in NOTCH3 playing an important role in VSMC differentiation, proliferation and apoptosis. Searching for a possible cause of VSMC dysfunction in CADASIL, we investigated morphology and proliferative activity the affected myocytes. In material from autopsy brains and skin-muscle biopsies of patients with CADASIL diagnosis, assessment of VSMCs in arterial vessels at the level of light and electron microscopy was performed...
November 6, 2018: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/30391675/pan-senescence-transcriptome-analysis-identified-rrad-as-a-marker-and-negative-regulator-of-cellular-senescence
#6
Zhao Wei, Haiyang Guo, Junchao Qin, Shihua Lu, Qiao Liu, Xiyu Zhang, Yongxin Zou, Yaoqin Gong, Changshun Shao
Cellular senescence, an irreversible proliferative arrest, functions in tissue remodeling during development and is implicated in multiple aging-associated diseases. While senescent cells often manifest an array of senescence-associated phenotypes, such as cell cycle arrest, altered heterochromatin architecture, reprogrammed metabolism and senescence-associated secretory phenotype (SASP), the identification of senescence cells has been hindered by lack of specific and universal biomarkers. To systematically identify universal biomarkers of cellular senescence, we integrated multiple transcriptome data sets of senescent cells obtained through different in vitro manipulation modes as well as age-related gene expression data of human tissues...
November 2, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/30336977/the-proteomic-study-of-serially-passaged-human-skin-fibroblast-cells-uncovers-down-regulation-of-the-chromosome-condensin-complex-proteins-involved-in-replicative-senescence
#7
Qian Meng, Jing Gao, Hongwen Zhu, Han He, Zhi Lu, Minhua Hong, Hu Zhou
Dermal fibroblast is one of the major constitutive cells of skin and plays a central role in skin senescence. The replicative senescence of fibroblasts may cause skin aging, bad wound healing, skin diseases and even cancer. In this study, a label-free quantitative proteomic approach was employed to analyzing the serial passaged human skin fibroblast (CCD-1079Sk) cells, resulting in 3371 proteins identified. Of which, 280 proteins were significantly changed in early passage (6 passages, P6), middle passage (12 passages, P12) and late passage (21 passages, P21), with a time-dependent decrease or increase tendency...
November 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30284122/carbohydrate-restricted-diet-promotes-skin-senescence-in-senescence-accelerated-prone-mice
#8
Qiming Wu, Shuang E, Kazushi Yamamoto, Tsuyoshi Tsuduki
This study used senescence-accelerated prone mice (SAMP8) to examine the effects of a carbohydrate-restricted diet on aging and skin senescence, to determine how long-term carbohydrate restriction affects the aging process. Three-week-old male SAMP8 mice were divided into three groups after 1 week of preliminary feeding: one was given a controlled diet, the other was given a high-fat diet, and the third was given a carbohydrate-restricted diet. Ad libitum feeding was administered until the mice reached 50 weeks of age...
October 3, 2018: Biogerontology
https://www.readbyqxmd.com/read/30279727/senescent-fibroblasts-drive-ageing-pigmentation-%C3%A2-a-potential-therapeutic-target-for-senile-lentigo
#9
Jung Eun Yoon, Yeongeun Kim, Soohyun Kwon, Misun Kim, Young Hwa Kim, Jang-Hee Kim, Tae Jun Park, Hee Young Kang
Cutaneous ageing is an important extrinsic process that modifies the pigmentary system. Because cellular senescence is a fundamental ageing mechanism, we examined the role of senescent cells in ageing pigmentation. Methods: Biopsies obtained from senile lentigo and perilesional normal skin were assayed for a marker of cellular senescence, p16INK4A . To determine the secretory phenotypes of senescent fibroblasts, we performed microarray, RNA sequencing and methylation array analyses in senile lentigo and senescent fibroblasts...
2018: Theranostics
https://www.readbyqxmd.com/read/30266801/targeting-lineage-specific-mitf-pathway-in-human-melanoma-cell-lines-by-a-485-the-selective-small-molecule-inhibitor-of-p300-cbp
#10
Rui Wang, Yupeng He, Valerie Robinson, Ziping Yang, Paul Hessler, Loren M Lasko, Xin Lu, Anahita Bhathena, Albert Lai, Tamar Uziel, Lloyd T Lam
Metastatic melanoma is responsible for approximately 80 percent of deaths from skin cancer. Microphthalmia-associated transcription factor (MITF) is a melanocyte-specific transcription factor that plays an important role in the differentiation, proliferation and survival of melanocytes as well as in melanoma oncogenesis. MITF is amplified in approximately 15% of metastatic melanoma patients. However, no small molecule inhibitors of MITF currently exist. MITF was shown to associate with p300/CBP, members of the KAT3 family of histone acetyltransferase (HAT)...
September 28, 2018: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/30266035/the-protective-effect-of-violaxanthin-from-nannochloropsis-oceanica-against-ultraviolet-b-induced-damage-in-normal-human-dermal-fibroblasts
#11
Hyun-Min Kim, Jin Hyuk Jung, Ji Yea Kim, Jina Heo, Dae-Hyun Cho, Hee-Sik Kim, Sungkwan An, In-Sook An, Seunghee Bae
Skin photoaging, which is mainly induced by ultraviolet B (UVB) radiation, is prevented by the application of UV-protective agents. The microalga Nannochloropsis oceanica (N. oceanica) has been primarily reported as a potential biofuel; however, in this study, we investigated whether N. oceanica extracts exerted photoprotective effects against UVB-irradiated human dermal fibroblasts (HDFs) and which single component was responsible for the protective effect of the extracts. Two extracts-pigment and non-pigment-were prepared from N...
September 28, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/30263780/inhibitory-effect-of-vitamin-c-on-intrinsic-aging-in-human-dermal-fibroblasts-and-hairless-mice
#12
Jae-Hong Jeong, Mi-Bo Kim, Changhee Kim, Jae-Kwan Hwang
Vitamin C significantly reduced senescence-associated β-galactosidase (SA-β-gal) activity, with both the suppression of cell-cycle inhibitors (p53, p21, p16, and pRb) and stimulation of cell-cycle activators (E2F1 and E2F2). Vitamin C also effectively attenuated the hyperactivation of the phosphatidylinositol 3-kinase (PI3K)/protein kinase-B (AKT) signaling pathway. The expression of the longevity marker, the mammalian target of rapamycin (mTOR), was down-regulated by vitamin C while the expressions of forkhead box O3a (FoxO3a) and sirtuin1 (SIRT1) were up-regulated by vitamin C...
April 2018: Food Science and Biotechnology
https://www.readbyqxmd.com/read/30239625/embryonic-stem-cell-derived-mmu-mir-291a-3p-inhibits-cellular-senescence-in-human-dermal-fibroblasts-through-the-tgf-%C3%AF-receptor-2-pathway
#13
Yun-Ui Bae, Youlim Son, Chang-Hyun Kim, Kwang Seok Kim, Se Hee Hyun, Hyun Goo Woo, Byul A Jee, Jun-Hyuk Choi, Hoon-Ki Sung, Hyung-Chul Choi, So Young Park, Ju-Hyun Bae, Kyung-Oh Doh, Jae-Ryong Kim
Senescent cells accumulate in various tissues over time, and contribute to tissue dysfunction and aging-associated phenotypes. Accumulating evidence suggests that cellular senescence can be inhibited through pharmacological intervention, as well as through treatment with soluble factors derived from embryonic stem cells (ESCs). In an attempt to investigate the anti-senescence factors secreted by ESCs, we analyzed mouse ESC-derived extracellular miRNAs in conditioned medium (CM) via miRNA array analysis. We selected mmu-miR-291a-3p as a putative anti-senescence factor via bioinformatics analysis...
September 15, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/30220987/evaluation-of-aging-diabetes-mellitus-and-skin-wounds-by-scanning-acoustic-microscopy-with-protease-digestion
#14
Katsutoshi Miura, Kanna Yamashita
Scanning acoustic microscopy (SAM) can assess tissue stiffness by calculating the speed of sound (SOS) through tissues. SOS increases as tissue stiffness increases. Sensitivity to protease digestion depends on protein type, concentration, and modification. We analyzed the SOS images of formalin-fixed paraffin-embedded skin sections from elderly, young, diabetic, and nondiabetic subjects, as well as chronic and acute wounds. SAM provided high-resolution histology similar to LM and revealed characteristic SOS alteration following pepsin treatment...
2018: Pathobiology of Aging & Age related Diseases
https://www.readbyqxmd.com/read/30215291/antiaging-effects-of-urolithin-a-on-replicative-senescent-human-skin-fibroblasts
#15
Chun-Feng Liu, Xiao-Lin Li, Zi-Long Zhang, Lu Qiu, Shi-Xuan Ding, Jun-Xin Xue, Guo-Ping Zhao, Jian Li
Although the health benefits attributed to urolithin A, such as anticancer, anti-inflammatory, and antioxidant effects, are based on numerous, diverse studies carried out in vitro, the biological effects of urolith A are still not entirely understood. In this study, we explored the biological effects of urolithin A using senescent human skin fibroblasts (HSFs) to determine whether urolithin A has any antiaging potential. Our results showed that urolithin A significantly increased type I collagen expression and reduced matrix metalloproteinase 1 (MMP-1) expression...
October 25, 2018: Rejuvenation Research
https://www.readbyqxmd.com/read/30190724/biomarkers-of-cellular-senescence-and-skin-aging
#16
REVIEW
Audrey S Wang, Oliver Dreesen
Cellular senescence is an irreversible growth arrest that occurs as a result of different damaging stimuli, including DNA damage, telomere shortening and dysfunction or oncogenic stress. Senescent cells exert a pleotropic effect on development, tissue aging and regeneration, inflammation, wound healing and tumor suppression. Strategies to remove senescent cells from aging tissues or preneoplastic lesions can delay tissue dysfunction and lead to increased healthspan. However, a significant hurdle in the aging field has been the identification of a universal biomarker that facilitates the unequivocal detection and quantification of senescent cell types in vitro and in vivo ...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/30166403/role-of-p53-senescence-induction-in-suppression-of-lncap-prostate-cancer-growth-by-cardiotonic-compound-bufalin
#17
Yong Zhang, Yinhui Dong, Michael W Melkus, Shutao Yin, Su-Ni Tang, Peixin Jiang, Kartick Pramanik, Wei Wu, Sangyub Kim, Min Ye, Hongbo Hu, Junxuan Lu, Cheng Jiang
Bufalin is a major cardiotonic compound in the traditional Chinese medicine, Chansu, prepared from toad skin secretions. Cell culture studies have suggested an anticancer potential involving multiple cellular processes, including differentiation, apoptosis, senescence, and angiogenesis. In prostate cancer cell models, P53-dependent and independent caspase-mediated apoptosis and androgen receptor (AR) antagonism have been described for bufalin at micromolar concentrations. Because a human pharmacokinetic study indicated that single nanomolar bufalin was safely achievable in the peripheral circulation, we evaluated its cellular activity within range with the AR-positive and P53 wild-type human LNCaP prostate cancer cells in vitro Our data show that bufalin induced caspase-mediated apoptosis at 20 nmol/L or higher concentration with concomitant suppression of AR protein and its best-known target, PSA and steroid receptor coactivator 1 and 3 (SRC-1, SRC-3)...
November 2018: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/30131826/copy-number-of-human-ribosomal-genes-with-aging-unchanged-mean-but-narrowed-range-and-decreased-variance-in-elderly-group
#18
Elena M Malinovskaya, Elizaveta S Ershova, Vera E Golimbet, Lev N Porokhovnik, Nataliya A Lyapunova, Serguey I Kutsev, Natalia N Veiko, Svetlana V Kostyuk
Introduction: The multi-copied genes coding for the human 18, 5.8, and 28S ribosomal RNA (rRNA) are located in five pairs of acrocentric chromosomes forming so-called rDNA. Human genome contains unmethylated, slightly methylated, and hypermethylated copies of rDNA. The major research question: What is the rDNA copy number (rDNA CN) and the content of hypermethylated rDNA as a function of age? Materials and Methods: We determined the rDNA CN in the blood leukocyte genomes of 651 subjects aged 17 to 91 years...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/30118525/tlr4-mediated-activation-of-the-erk-pathway-following-uva-irradiation-contributes-to-increased-cytokine-and-mmp-expression-in-senescent-human-dermal-fibroblasts
#19
Seong-Wook Seo, Seul-Ki Park, Soo-Jin Oh, Ok Sarah Shin
Exposure to ultraviolet (UV) radiation is a major contributing factor to premature aging (photoaging) and skin cancer. In vitro models of cellular senescence have proven to be very useful for the study of slow and progressive accumulation of damage resulting in the growth arrest of aging skin cells. In this study, we compared UVA-induced cellular responses in non-senescent (NS) vs. senescent (S) human dermal fibroblasts (HDFs). HDFs were irradiated with a single dose of UVA (7.5 J/cm2) and QuantSeq 3' mRNA sequencing was performed to assess differential gene expression...
2018: PloS One
https://www.readbyqxmd.com/read/30109767/altered-modulation-of-lamin-a-c-hdac2-interaction-and-p21-expression-during-oxidative-stress-response-in-hgps
#20
Elisabetta Mattioli, Davide Andrenacci, Cecilia Garofalo, Sabino Prencipe, Katia Scotlandi, Daniel Remondini, Davide Gentilini, Anna Maria Di Blasio, Sergio Valente, Emanuela Scarano, Lucia Cicchilitti, Giulia Piaggio, Antonello Mai, Giovanna Lattanzi
Defects in stress response are main determinants of cellular senescence and organism aging. In fibroblasts from patients affected by Hutchinson-Gilford progeria, a severe LMNA-linked syndrome associated with bone resorption, cardiovascular disorders, and premature aging, we found altered modulation of CDKN1A, encoding p21, upon oxidative stress induction, and accumulation of senescence markers during stress recovery. In this context, we unraveled a dynamic interaction of lamin A/C with HDAC2, an histone deacetylase that regulates CDKN1A expression...
October 2018: Aging Cell
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