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Photoaging

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https://www.readbyqxmd.com/read/30005103/combination-ablative-approach-to-laser-therapy-in-advanced-aging-of-the-face
#1
Brandon Worley, Joel L Cohen
BACKGROUND AND OBJECTIVE: Misperceptions have persisted regarding scanning full-field erbium laser that have caused it to be overshadowed by fractional ablative resurfacing. This can lead to sub-optimally treating the periocular and perioral skin. Our report describes the utility of a combined approach of fractional ablative CO2 with full-field erbium ablation for full face rejuvenation. Each laser has a role in creating the optimal outcomes for advanced photoaging in the fewest treatments...
July 1, 2018: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/30004816/gallotannin-improves-the-photoaged-related-proteins-by-extracellular-signal-regulated-kinases-c-jun-n-terminal-kinases-signaling-pathway-in-human-epidermal-keratinocyte-cells
#2
Gyoseon Goya M Ryeom, Weon Jeong Bang, Young Bu Kim, Go Eun Lee
Tannins are a type of polyphenols found in several fruits such as grapes and berries, and nuts such as aronias and acorns. Both hydrolyzable tannins and condensed tannins are referred to as tannins. Among the hydrolyzable tannins, gallotannin has a strong antioxidative property and is known to protect the skin by inhibiting the precursors of elastolytic enzymes. However, its mechanism of protection against ultraviolet B (UVB) damage in human fibroblasts and keratinocytes has not yet been elucidated. In this study, we investigate the antioxidant and antiaging effect of gallotannin on UVB-irradiated human cells by studying its effect on extracellular signal-regulated kinases/c-Jun N-terminal kinases (EKRs/JNKs) signaling related to cell growth and differentiation/stress apoptosis...
July 13, 2018: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29996001/the-chemical-compositions-of-angelica-pubescens-oil-and-its-prevention-of-uv-b-radiation-induced-cutaneous-photoaging
#3
Dingkang Chen, Zhiyun Du, Zhirong Lin, Ping Su, Hanyi Huang, Zhirong Ou, Wanyi Pan, Shiya Huang, Kun Zhang, Xi Zheng, Li Lin, Lanyue Zhang
Angelica pubescens, a plant of the family Umbelliferae, has been widely used as traditional Chinese medicine for the treatment of many diseases; however, there has been minimal modern research focused on the pharmacological activity of oils extracted from Angelica pubescens, in particular, the potential anti-photoaging effects. Therefore, in the present study, we analyzed the chemical composition of Angelica pubescens oil (AO) and evaluated its bioactivity against photoaging in ultraviolet (UV) -B radiation-induced hairless mice...
July 11, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29987028/role-of-elemental-carbon-in-the-photochemical-aging-of-soot
#4
Meng Li, Fengxia Bao, Yue Zhang, Wenjing Song, Chuncheng Chen, Jincai Zhao
Soot, which consists of organic carbon (OC) and elemental carbon (EC), is a significant component of the total aerosol mass in the atmosphere. Photochemical oxidation is an important aging pathway for soot. It is commonly believed that OC is photoactive but EC, albeit its strong light absorption, is photochemically inert. Here, by taking advantage of the different light absorption properties of OC and EC, we provide direct experimental evidence that EC also plays an important role in the photochemical aging of soot by initiating the oxidation of OC, even under red light irradiation...
July 9, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29984435/a-theoretical-and-experimental-study-of-the-temporal-reduction-in-uv-protection-provided-by-a-facial-day-cream
#5
B L Diffey, C O'Connor, I Marlow, M Bell, M M O'Mahony
OBJECTIVE: To investigate how the UV protection provided by a facial day cream reduces over the course of a day. METHODS: We developed a theoretical model using a Monte Carlo random sampling approach to estimate the variation in local thickness, and hence local effective SPF, at several different sites over the face. The input variables, which are labelled SPF, average application thickness, homogeneity of the product on the skin and the ability of the product to bind to the skin, allow examination of how these different factors affect the delivered photoprotection...
July 8, 2018: International Journal of Cosmetic Science
https://www.readbyqxmd.com/read/29981751/review-of-environmental-effects-of-oxybenzone-and-other-sunscreen-active-ingredients
#6
REVIEW
Samantha L Schneider, Henry W Lim
With increasing awareness regarding the risks of sunburn, photoaging and skin cancer, the use of sunscreens has increased. Organic and inorganic filters are used in sunscreen products worldwide. Concerns have been raised on commonly used organic UV filters including oxybenzone (benzophenone-3; BP-3), 4-methylbenzylidene camphor (4-MBC), octocrylene (OC), and octinoxate (ethylhexyl methoxycinnamate; EHMC) on their effects on the environment. Studies have identified UV filters such as oxybenzone, octocrylene, octinoxate and ethylhexyl salicylate (ES) in almost all water sources around the world and have commented that these filters are not easily removed by common waste water treatment plant techniques...
June 28, 2018: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/29967648/anti-inflammatory-effect-of-etas%C3%A2-50-by-inhibiting-nuclear-factor-%C3%AE%C2%BA-b-p65-nuclear-import-in-ultraviolet-b-irradiated-normal-human-dermal-fibroblasts
#7
Ken Shirato, Tomoko Koda, Jun Takanari, Takuya Sakurai, Junetsu Ogasawara, Kazuhiko Imaizumi, Hideki Ohno, Takako Kizaki
Ultraviolet (UV) irradiation induces proinflammatory responses in skin cells, including dermal fibroblasts, accelerating premature skin aging (photoaging). ETAS 50, a standardized extract from the Asparagus officinalis stem, is a novel and unique functional food that suppresses proinflammatory responses of hydrogen peroxide-stimulated skin fibroblasts and interleukin- (IL-) 1 β -stimulated hepatocytes. To elucidate its antiphotoaging potencies, we examined whether ETAS 50 treatment after UV-B irradiation attenuates proinflammatory responses of normal human dermal fibroblasts (NHDFs)...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29966991/rubus-idaeus-l-red-raspberry-blocks-uvb-induced-mmp-production-and-promotes-type-i-procollagen-synthesis-via-inhibition-of-mapk-ap-1-nf-%C3%AE%C2%BA%C3%AE-and-stimulation-of-tgf-%C3%AE-smad-nrf2-in-normal-human-dermal-fibroblasts
#8
Wei Gao, Yu-Shuai Wang, Eunson Hwang, Pei Lin, Jahyun Bae, Seul A Seo, Zhengfei Yan, Tae-Hoo Yi
Chronic exposure to ultraviolet (UV) radiation causes photo-oxidation, which in turn results in the upregulation of matrix metalloproteinases (MMPs) and loss of collagen. Rubus idaeus L. (RI), also called red raspberry, is an important cash crop that contains abundant antioxidant compounds. Sanguiin H-6 and lambertianin C are the major ingredients presented in the extracts. Here, we studied the protective effect of RI on UVB-induced photoaging in normal human dermal fibroblasts (NHDFs). We found that RI notably reduced UVB-induced MMPs secretion and pro-inflammatory mediators production, and significantly suppressed UVB-induced activation of mitogen-activated protein kinase (MAPK), nuclear factor-κβ, as well as activator protein 1...
June 22, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29965900/a-role-for-clusterin-in-exfoliation-syndrome-and-exfoliation-glaucoma
#9
Janey L Wiggs, Jae Hee Kang, BaoJian Fan, Hani Levkovitch-Verbin, Louis R Pasquale
The multifunctional protein clusterin (CLU) is a secreted glycoprotein ubiquitously expressed throughout the body, including in the eye. Its primary function is to act as an extracellular molecular chaperone, preventing the precipitation and aggregation of misfolded extracellular proteins. Clusterin is commonly identified at fluid-tissue interfaces, and has been identified in most body fluids. It is a component of exfoliation material, and CLU mRNA is reduced in eyes with exfoliation syndrome compared with controls...
July 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29953418/a-prospective-study-of-the-safety-and-efficacy-of-a-microneedle-fractional-radiofrequency-system-for-global-facial-photoaging-in-chinese-patients
#10
Mengli Zhang, Jing Fang, Qiuju Wu, Tong Lin
BACKGROUND: Facial photoaging has become a major cosmetic concern, and the microneedle fractional radiofrequency system (MFRS) is a novel method for rejuvenation that combines radiofrequency and microneedles. OBJECTIVE: This study prospectively evaluated the efficacy and safety of an MFRS in the treatment of facial photoaged skin in Chinese patients. MATERIALS AND METHODS: Twenty-seven patients with moderate facial photoaging were recruited and received 3 treatments at 4-week intervals...
July 2018: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29947134/prospective-randomized-double-blind-assessment-of-topical-bakuchiol-and-retinol-for-facial-photoaging
#11
S Dhaliwal, I Rybak, S Ellis, M Notay, M Trivedi, W Burney, A R Vaughn, M Nguyen, P Reiter, S Bosanac, H Yan, N Foolad, R K Sivamani
BACKGROUND: Bakuchiol is a phytochemical that has demonstrated cutaneous anti-aging effects when applied topically. Early studies have suggested that bakuchiol is a functional analog of topical retinoids, as both compounds have been shown to induce similar gene expression in the skin and lead to improvement of cutaneous photodamage. No in vivo studies have compared the two compounds for efficacy and side effects. OBJECTIVES: To compare the clinical efficacy and side effect profiles of bakuchiol to retinol in improving common signs of cutaneous facial aging...
June 27, 2018: British Journal of Dermatology
https://www.readbyqxmd.com/read/29943823/bmal1-and-clock-proteins-in-regulating-uvb-induced-apoptosis-and-dna-damage-responses-in-human-keratinocytes
#12
Yang Sun, Peiling Wang, Hongyu Li, Jun Dai
A diverse array of biological processes are under circadian controls. In mouse skin, ultraviolet ray (UVR)-induced apoptosis and DNA damage responses are time-of-day dependent, which are controlled by core clock proteins. This study investigates the roles of clock proteins in regulating UVB responses in human keratinocytes (HKCs). We found that the messenger RNA expression of brain and muscle ARNT-like 1 (BMAL1) and circadian locomotor output cycles kaput (CLOCK) genes is altered by low doses (5 mJ/cm2 ) of UVB in the immortalized HaCat HKCs cell line...
June 26, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29943461/protective-effect-of-skin-derived-precursors-on-photoaging-in-nude-mice
#13
Siyu Wang, Jianqiao Zhong, Li Li
OBJECTIVES: Currently, innovative methods to prevent photoaging are needed. Skin-derived precursors (SKP) have been shown to play a crucial role in resisting UVB-induced apoptosis in vitro. The objective of this study was to explore the effect of SKP on preventing skin photoaging in vivo. METHODS: Skin-derived precursors from neonatal BALB/c mice were isolated, identified and intradermally transplanted with a PKH26 label to track their survival. These were then injected at different concentrations into the buttock dermis of nude mice at 2-weekly intervals before UV irradiation...
June 25, 2018: Australasian Journal of Dermatology
https://www.readbyqxmd.com/read/29940937/probiotic-fermentation-augments-the-skin-anti-photoaging-properties-of-agastache-rugosa-through-up-regulating-antioxidant-components-in-uv-b-irradiated-hacat-keratinocytes
#14
Daehyun Shin, Yoonjin Lee, Yu-Hua Huang, Hye-Won Lim, Kyounghee Jang, Dae-Duk Kim, Chang-Jin Lim
BACKGROUND: Agastache rugosa (Fisch. & C.A.Mey.) Kuntze (Korean mint) is used to treat diverse types of human disorders in traditional medicine. In recent years, its non-fermented leaf extract (ARE) has been shown to possess protective properties against ultraviolet-B (UV-B) radiation-induced photooxidative stress. The present work aimed to examine whether probiotic bacterial fermentation would potentiate the skin anti-photoaging activity of ARE or not, by comparing the protective properties of ARE and corresponding fermented extract (ARE-F) against UV-B radiation-induced photooxidative stress in HaCaT keratinocytes...
June 26, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29932111/protective-effect-of-octylmethoxycinnamate-against-uv-induced-photoaging-in-hairless-mouse-via-the-regulation-of-matrix-metalloproteinases
#15
So Young Kim, Santosh Lamichhane, Jung-Hun Ju, Jaesuk Yun
Ultraviolet (UV) irradiation damages skin and produces symptoms of photoaging, such as thickening, rough texture, wrinkles, and pigmentation. However, the cellular and molecular mechanisms underlying photoaging induced by chronic UV irradiation are not yet fully understood. Matrix metalloproteinases (MMPs) have been reported to be involved in the response to UV irradiation. In this study, we examined the effects of the sunscreen agent Octylmethoxycinnamate (OMC) on photoaging of the skin induced by chronic UV exposure in hairless albino Crl:SKH1- Hrhr (SKH-1) mice...
June 22, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29926349/production-of-functional-human-cuzn-sod-and-ec-sod-in-bitransgenic-cloned-goat-milk
#16
Rui Lu, Ting Zhang, Daijin Wu, Zhengyi He, Lei Jiang, Minya Zhou, Yong Cheng
Human copper/zinc superoxide dismutase (CuZn-SOD) and extracellular superoxide dismutase (EC-SOD) are two superoxide dismutases that scavenge reactive oxygen species (ROS). Their biological role of eliminating oxidative stress caused by excessive ROS levels in living organisms has been utilized in medical treatment, preventing skin photoaging and food preservation. In this study, we employed two sequences that encode human CuZn-SOD and EC-SOD, along with goat beta-casein 5' and 3' regulatory elements, to construct mammary gland-specific expression vectors...
June 20, 2018: Transgenic Research
https://www.readbyqxmd.com/read/29908579/herbal-sun-protection-agents-human-studies
#17
Lana Rabinovich, Viktoryia Kazlouskaya
Topical sunscreens are the mainstay for protection from ultraviolet (UV) radiation. With skin cancer rates on the rise and great interest in reversing or preventing the effects of photoaging, new molecules with potential to defend against UV damage have received a great deal of attention. Specifically, there is a growing interest in herbal substances that offer protection against the damaging effects of UV rays. Herbal substances may work as adsorbents of the UV rays and antioxidants and potentially have few side effects...
May 2018: Clinics in Dermatology
https://www.readbyqxmd.com/read/29901204/protective-effect-of-crocin-on-ultraviolet-b%C3%A2-induced-dermal-fibroblast-photoaging
#18
Mingwu Deng, Dong Li, Yichen Zhang, Guangdong Zhou, Wei Liu, Yilin Cao, Wenjie Zhang
Ultraviolet B (UVB) radiation induces the production of reactive oxygen species (ROS), resulting in the aging of dermal fibroblasts. Crocin, a bioactive constituent of Crocus sativus, possesses anti‑oxidation effects. The purpose of the present study was to evaluate the protective effect of crocin on UVB‑induced dermal fibroblast photoaging. Human dermal fibroblasts were isolated and cultured with different concentrations of crocin prior to and following exposure to UVB irradiation. The senescent phenotypes of cells were evaluated, including cell proliferation, cell cycle, senescence‑associated β‑galactosidase (SA‑β‑gal) expression, intracellular ROS, expression of antioxidant protein glutathione peroxidase 1 (GPX‑1) and extracellular matrix protein collagen type 1 (Col‑1)...
June 11, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29898032/long-non-coding-rna-hotair-promotes-uvb-induced-apoptosis-and-inflammatory-injury-by-up-regulation-of-pkr-in-keratinocytes
#19
Guo Liu, Wenhao Zhang
Excessive exposure to ultraviolet (UV) rays can cause damage of the skin and may induce cancer, immunosuppression, photoaging, and inflammation. The long non-coding RNA (lncRNA) HOX antisense intergenic RNA (HOTAIR) is involved in multiple human biological processes. However, its role in UVB-induced keratinocyte injury is unclear. This study was performed to investigate the effects of HOTAIR in UVB-induced apoptosis and inflammatory injury in human keratinocytes (HaCaT cells). Quantitative real-time polymerase chain reaction was performed to analyze the expression levels of HOTAIR, PKR, TNF-α, and IL-6...
June 11, 2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29890746/exosomes-derived-from-human-induced-pluripotent-stem-cells-ameliorate-the-aging-of-skin-fibroblasts
#20
Myeongsik Oh, Jinhee Lee, Yu Jin Kim, Won Jong Rhee, Ju Hyun Park
Stem cells and their paracrine factors have emerged as a resource for regenerative medicine. Many studies have shown the beneficial effects of paracrine factors secreted from adult stem cells, such as exosomes, on skin aging. However, to date, few reports have demonstrated the use of exosomes derived from human pluripotent stem cells for the treatment of skin aging. In this study, we collected exosomes from the conditioned medium of human induced pluripotent stem cells (iPSCs) and investigated the effect on aged human dermal fibroblasts (HDFs)...
June 9, 2018: International Journal of Molecular Sciences
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