scholarly journals Laminarin Effects, a β-(1,3)-Glucan, on Skin Cell Inflammation and Oxidation

Cosmetics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 66 ◽  
Author(s):  
Hélène Ozanne ◽  
Hechmi Toumi ◽  
Benoît Roubinet ◽  
Ludovic Landemarre ◽  
Eric Lespessailles ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Antioxidant Activities ◽  
Dermal Fibroblasts ◽  
Epidermal Keratinocytes ◽  
Type I ◽  
Human Epidermal Keratinocytes ◽  
Procollagen Type ◽  
Skin Cells ◽  
Radiation Conditions ◽  
Uva Radiation

Laminarin, a β-(1,3)-glucan from the seaweed Laminaria digitata, is a polysaccharide which provides anti-inflammatory and anti-oxidative properties. Its influence on both human dermal fibroblasts adult (HDFa) and normal human epidermal keratinocytes (NHEK) has not been established yet. Herein, laminarin effects were examined on skin cells’ mitochondrial and antioxidant activities. Cytokines, hyaluronic acid, and procollagen type I secretions and interaction mechanisms were explored after a maximum of 72 h treatment with laminarin. Our results demonstrated a decrease in mitochondrial activities with 72 h treatment with laminarin from 500 µg.mL−1 for NHEK cells and from 100 µg.mL−1 for HDFa cells without cytotoxicity. No variation of hyaluronic acid or type I procollagen was observed for all laminarin concentrations, while an antioxidant effect was found against reactive oxygen species (ROS) from 1 µg.mL−1 for HDFa cells in both H2O2 and UVA radiation conditions, and from 10 µg.mL−1 and 1 µg.mL−1 for NHEK cells in both H2O2 and UVA radiation conditions, respectively. Laminarin treatment modulated both cells surface glycosylation and cytokine secretions of skin cells. Overall, our data suggest a positive effect of β-(1,3)-glucan on skin cells on oxidative stress and inflammation induced by environmental factors. Of note, these effects are through the modulation of glycan and receptors interactions at the skin cells surface.

Cytotoxicity of Magnetic Nanoparticles on Normal and Malignant Human Skin Cells

Nano LIFE ◽  
2014 ◽  
Vol 04 (01) ◽  
pp. 1440002 ◽  
Author(s):  
Rehab M. Amin ◽  
Abuelmagd Abdelmonem ◽  
Thomas Verwanger ◽  
Elsayed Elsherbini ◽  
Barbara Krammer
Keyword(s):  
Magnetic Nanoparticles ◽  
Cell Lines ◽  
Dermal Fibroblasts ◽  
Carcinoma Cells ◽  
Diagnostic Tools ◽  
Epidermal Keratinocytes ◽  
A431 Cells ◽  
Human Epidermal Keratinocytes ◽  
Skin Cells ◽  
Human Squamous Cell Carcinoma

Magnetic nanoparticles have received considerable attention in nanomedicine due to their potential application as therapeutic or diagnostic tools based on their particular properties. However, prior to clinical application investigating the effect of these nanoparticles on cells is essential. The aim of the following study is therefore to evaluate the cytotoxicity of magnetic ( Fe 3 O 4) and gold-coated magnetic nanoparticles ( Fe 3 O 4@ Au ) on various cell lines in order to clarify the risk of these materials for human use. Toxicity of these nanoparticles on human dermal fibroblasts (SKIN), human squamous cell carcinoma cells (A431 cells) and human epidermal keratinocytes ( HaCaT cells) were determined using the MTT assay. Results showed that, within the used concentration range, Fe 3 O 4 nanoparticles had no significant effect on all investigated cell lines, while Fe 3 O 4@ Au nanoparticles seem to have a moderate toxicity on all cell lines with some selectivity for the malignant cells, although it is yet moderate. The different characteristic of the cell lines' survival with respect to incubation time and nanoparticle concentration could be partly due to different cell death modes. Therefore, the prepared Fe 3 O 4 nanoparticles are harmless and could be applied safely for skin cancer treatment or diagnosis.

scholarly journals The Characterization of Scaffolds Based on Dialdehyde Chitosan/Hyaluronic Acid

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4993
Author(s):  
Sylwia Grabska-Zielińska ◽  
Adrianna Sosik ◽  
Anna Małkowska ◽  
Ewa Olewnik-Kruszkowska ◽  
Kerstin Steinbrink ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Physicochemical Properties ◽  
Cell Viability ◽  
Water Content ◽  
Three Dimensional ◽  
Dermal Fibroblasts ◽  
Epidermal Keratinocytes ◽  
Human Epidermal Keratinocytes ◽  
One Step

In this work, two-component dialdehyde chitosan/hyaluronic acid scaffolds were developed and characterized. Dialdehyde chitosan was obtained by one-step synthesis with chitosan and sodium periodate. Three-dimensional scaffolds were prepared by the lyophilization method. Fourier transform infrared spectroscopy (FTIR) was used to observe the chemical structure of scaffolds and scanning electron microscopy (SEM) imaging was done to assess the microstructure of resultant materials. Thermal analysis, mechanical properties measurements, density, porosity and water content measurements were used to characterize physicochemical properties of dialdehyde chitosan/hyaluronic acid 3D materials. Additionally, human epidermal keratinocytes (NHEK), dermal fibroblasts (NHDF) and human melanoma cells (A375 and G-361) were used to evaluate cell viability in the presence of subjected scaffolds. It was found that scaffolds were characterized by a porous structure with interconnected pores. The scaffold composition has an influence on physicochemical properties, such as mechanical strength, thermal resistance, porosity and water content. There were no significant differences between cell viability proliferation of all scaffolds, and this observation was visible for all subjected cell lines.

scholarly journals Antioxidant and Pro-Oxidant Capacities as Mechanisms of Photoprotection of Olive Polyphenols on UVA-Damaged Human Keratinocytes

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2153
Author(s):  
Raffaella Marina Lecci ◽  
Isabella D’Antuono ◽  
Angela Cardinali ◽  
Antonella Garbetta ◽  
Vito Linsalata ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Biological Activities ◽  
Human Keratinocytes ◽  
Ldl Oxidation ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Epidermal Keratinocytes ◽  
Olive Cultivar ◽  
Human Epidermal Keratinocytes ◽  
Apoptotic Effect

A wide variety of polyphenols are reported to have considerable antioxidant and skin photoprotective effects, although the mechanisms of action are not fully known. Environmentally friendly and inexpensive sources of natural bioactive compounds, such as olive mill wastewater (OMWW), the by-product of olive-oil processing, can be considered an economic source of bioactive polyphenols, with a range of biological activities, useful as chemotherapeutic or cosmeceutical agents. Green strategies, such as the process based on membrane technologies, allow to recover active polyphenols from this complex matrix. This study aims to evaluate the antioxidant, pro-oxidant, and photoprotective effects, including the underlying action mechanism(s), of the ultra-filtered (UF) OMWW fractions, in order to substantiate their use as natural cosmeceutical ingredient. Six chemically characterized UF-OMWW fractions, from Italian and Greek olive cultivar processing, were investigated for their antioxidant activities, measured by Trolox Equivalent Antioxidant Capacity (TEAC), LDL oxidation inhibition, and ROS-quenching ability in UVA-irradiated HEKa (Human Epidermal Keratinocytes adult) cultures. The photoprotective properties of UF-OMWW were assayed as a pro-oxidant-mediated pro-apoptotic effect on the UVA-damaged HEKa cells, which can be potentially involved in the carcinogenesis process. All the UF-OMWW fractions exerted an effective antioxidant activity in vitro and in cells when administered together with UV-radiation on HEKa. A pro-oxidative and pro-apoptotic effect on the UVA-damaged HEKa cells were observed, suggesting some protective actions of polyphenol fraction on keratinocyte cell cultures.

Keratinocyte growth regulation in fibroblast cocultures via a double paracrine mechanism

1999 ◽  
Vol 112 (12) ◽  
pp. 1843-1853 ◽  
Author(s):  
N. Maas-Szabowski ◽  
A. Shimotoyodome ◽  
N.E. Fusenig
Keyword(s):  
Neutralizing Antibodies ◽  
Growth Regulation ◽  
Keratinocyte Growth Factor ◽  
Dermal Fibroblasts ◽  
Tissue Homeostasis ◽  
Epidermal Keratinocytes ◽  
Human Epidermal Keratinocytes ◽  
Keratinocyte Proliferation ◽  
Normal Human ◽  
Kinetics Of

Epithelial-mesenchymal interactions play an important role in regulating tissue homeostasis and repair. For skin, the regulatory mechanisms of epidermal-dermal interactions were studied in cocultures of normal human epidermal keratinocytes (NEK) and dermal fibroblasts (HDF) rendered postmitotic by alpha-irradiation (HDFi). The expression kinetics of different cytokines and their receptors with presumed signalling function in skin were determined at the RNA and protein level in mono- and cocultured NEK and HDFi. In cocultured HDFi, mRNA and protein synthesis of keratinocyte growth factor (KGF) (FGF-7) was strongly enhanced, whereas in cocultured keratinocytes interleukin (IL)-1alpha and -1beta mRNA expression increased compared to monocultures. Thus we postulated that IL-1, which had no effect on keratinocyte proliferation, induced in fibroblasts the expression of factors stimulating keratinocyte proliferation, such as KGF. The functional significance of this reciprocal modulation was substantiated by blocking experiments. Both IL-1alpha and -1beta-neutralizing antibodies and IL-1 receptor antagonist significantly reduced keratinocyte proliferation supposedly through abrogation of KGF production, because IL-1 antibodies blocked the induced KGF production. These data indicate a regulation of keratinocyte growth by a double paracrine mechanism through release of IL-1 which induces KGF in cocultured fibroblasts. Thus IL-1, in addition to its proinflammatory function in skin, may play an essential role in regulating tissue homeostasis.

scholarly journals Nickel Nanoparticles Induce the Synthesis of a Tumor-Related Polypeptide in Human Epidermal Keratinocytes

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 992
Author(s):  
Javier Jiménez-Lamana ◽  
Simon Godin ◽  
Gerard Aragonès ◽  
Cinta Bladé ◽  
Joanna Szpunar ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Nickel Nanoparticles ◽  
Epidermal Keratinocytes ◽  
Human Epidermal Keratinocytes ◽  
Nickel Allergy ◽  
Skin Cells ◽  
Nickel Binding ◽  
Nickel Compounds ◽  
Linear Behavior ◽  
Genotoxic Carcinogens

Although nickel allergy and carcinogenicity are well known, their molecular mechanisms are still uncertain, thus demanding studies at the molecular level. The nickel carcinogenicity is known to be dependent on the chemical form of nickel, since only certain nickel compounds can enter the cell. This study investigates, for the first time, the cytotoxicity, cellular uptake, and molecular targets of nickel nanoparticles (NiNPs) in human skin cells in comparison with other chemical forms of nickel. The dose-response curve that was obtained for NiNPs in the cytotoxicity assays showed a linear behavior typical of genotoxic carcinogens. The exposure of keratinocytes to NiNPs leads to the release of Ni2+ ions and its accumulation in the cytosol. A 6 kDa nickel-binding molecule was found to be synthesized by cells exposed to NiNPs at a dose corresponding to medium mortality. This molecule was identified to be tumor-related p63-regulated gene 1 protein.

scholarly journals Persea americanaMill. Seed: Fractionation, Characterization, and Effects on Human Keratinocytes and Fibroblasts

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Maria del R. Ramos-Jerz ◽  
Socorro Villanueva ◽  
Gerold Jerz ◽  
Peter Winterhalter ◽  
Alexandra M. Deters
Keyword(s):  
Chlorogenic Acid ◽  
Dermal Fibroblasts ◽  
Persea Americana ◽  
Epidermal Keratinocytes ◽  
Hacat Keratinocytes ◽  
Human Epidermal Keratinocytes ◽  
Residual Solvent ◽  
Keratinocyte Proliferation ◽  
Normal Human

Methanolic avocado (Persea americanaMill., Lauraceae) seed extracts were separated by preparative HSCCC. Partition and HSCCC fractions were principally characterized by LC-ESI-MS/MS analysis. Theirin vitroinfluence was investigated on proliferation, differentiation, cell viability, and gene expression on HaCaT and normal human epidermal keratinocytes (NHEK) and normal human dermal fibroblasts (NHDF). The methanol-water partition (M) from avocado seeds and HSCCC fraction 3 (M.3) were mostly composed of chlorogenic acid and its isomers. Both reduced NHDF but enhanced HaCaT keratinocytes proliferation. HSCCC fractionM.2composed of quinic acid among chlorogenic acid and its isomers inhibited proliferation and directly induced differentiation of keratinocytes as observed on gene and protein level. Furthermore,M.2increased NHDF proliferation via upregulation of growth factor receptors. Salidrosides and ABA derivatives present in HSCCC fractionM.6increased NHDF and keratinocyte proliferation that resulted in differentiation. The residual solvent fractionM.7contained among low concentrations of ABA derivatives high amounts of proanthocyanidins B1 and B2 as well as an A-type trimer and stimulated proliferation of normal cells and inhibited the proliferation of immortalized HaCaT keratinocytes.

Procollagen Type I C-terminal propeptide, procollagen Type III N-terminal propeptide, hyaluronic acid, and laminin in the cerebrospinal fluid of rats with communicating hydrocephalus

2013 ◽  
Vol 11 (6) ◽  
pp. 692-696 ◽  
Author(s):  
Hao Xu ◽  
Zhanxiang Wang ◽  
Shaolin Zhang ◽  
Guowei Tan ◽  
Hongwei Zhu
Keyword(s):  
Hyaluronic Acid ◽  
Saline Control ◽  
Control Group ◽  
Communicating Hydrocephalus ◽  
Type I ◽  
Type Iii ◽  
Procollagen Type ◽  
Procollagen Type I ◽  
Group 5 ◽  
Diagnostic Index

Object Fibrosis along the route of CSF flow is indicated by the development of hydrocephalus. The changes of fibrosis index might reflect the level of hydrocephalus and even become a diagnostic index of hydrocephalus. The object of this study was to analyze the levels of procollagen Type I C-terminal propeptide (PICP), procollagen Type III N-terminal propeptide (PIIINP), hyaluronic acid (HA), and laminin (LN) and their significance in the CSF of communicating hydrocephalus rat models. Methods Thirty adult Sprague-Dawley rats were randomly divided into 3 groups: hydrocephalus group (20 rats) with intraventricular kaolin injections, sham control group (5 rats) with saline injections, and normal group (5 rats) without any processing. The levels of PICP, PIIINP, HA, and LN in the CSF were detected using ELISA. Results Levels of PICP, PIIINP, HA, and LN in the hydrocephalus group were significantly higher than those in the saline control group (p < 0.05). It was revealed by correlation analysis that the increase was positively correlated with the severity of ventricular dilation. Conclusions Results indicated that PICP, PIIINP, HA, and LN continue to rise dramatically in experimental hydrocephalus and may serve as the diagnostic index of hydrocephalus.

scholarly journals Impact on Autophagy and Ultraviolet B Induced Responses of Treatment with the MTOR Inhibitors Rapamycin, Everolimus, Torin 1, and pp242 in Human Keratinocytes

2017 ◽  
Vol 2017 ◽  
pp. 1-21 ◽  
Author(s):  
Song Xu ◽  
Li Li ◽  
Min Li ◽  
Mengli Zhang ◽  
Mei Ju ◽  
...  
Keyword(s):  
Mammalian Cells ◽  
Cellular Response ◽  
Mtor Inhibitors ◽  
Mtor Signaling ◽  
Ultraviolet B ◽  
Epidermal Keratinocytes ◽  
Human Epidermal Keratinocytes ◽  
Mtor Inhibition ◽  
The Impact ◽  
Uva Radiation

The mechanistic target of Rapamycin (MTOR) protein is a crucial signaling regulator in mammalian cells that is extensively involved in cellular biology. The function of MTOR signaling in keratinocytes remains unclear. In this study, we detected the MTOR signaling and autophagy response in the human keratinocyte cell line HaCaT and human epidermal keratinocytes treated with MTOR inhibitors. Moreover, we detected the impact of MTOR inhibitors on keratinocytes exposed to the common carcinogenic stressors ultraviolet B (UVB) and UVA radiation. As a result, keratinocytes were sensitive to the MTOR inhibitors Rapamycin, everolimus, Torin 1, and pp242, but the regulation of MTOR downstream signaling was distinct. Next, autophagy induction only was observed in HaCaT cells treated with Rapamycin. Furthermore, we found that MTOR signaling was insensitive to UVB but sensitive to UVA radiation. UVB treatment also had no impact on the inhibition of MTOR signaling by MTOR inhibitors. Finally, MTOR inhibition by Rapamycin, everolimus, or pp242 did not affect the series of biological events in keratinocytes exposed to UVB, including the downregulation of BiP and PERK, activation of Histone H2A and JNK, and cleavage of caspase-3 and PARP. Our study demonstrated that MTOR inhibition in keratinocytes cannot always induce autophagy, and the MTOR pathway does not play a central role in the UVB triggered cellular response.

scholarly journals Eisenia bicyclis Extract Repairs UVB-Induced Skin Photoaging In Vitro and In Vivo: Photoprotective Effects

Marine Drugs ◽  
2021 ◽  
Vol 19 (12) ◽  
pp. 693
Author(s):  
Se-In Choi ◽  
Hee-Soo Han ◽  
Jae-Min Kim ◽  
Geonha Park ◽  
Young-Pyo Jang ◽  
...  
Keyword(s):  
Collagen Type ◽  
Collagen Type I ◽  
Skin Aging ◽  
Dermal Fibroblasts ◽  
Tissue Inhibitors Of Metalloproteinases ◽  
Epidermal Keratinocytes ◽  
Heme Oxygenase 1 ◽  
Type I ◽  
Skin Damage ◽  
Eisenia Bicyclis

Chronic exposure to ultraviolet B (UVB) is a major cause of skin aging. The aim of the present study was to determine the photoprotective effect of a 30% ethanol extract of Eisenia bicyclis (Kjellman) Setchell (EEB) against UVB-induced skin aging. By treating human dermal fibroblasts (Hs68) with EEB after UVB irradiation, we found that EEB had a cytoprotective effect. EEB treatment significantly decreased UVB-induced matrix metalloproteinase-1 (MMP-1) production by suppressing the activation of mitogen-activated protein kinase (MAPK)/activator protein 1 (AP-1) signaling and enhancing the protein expression of tissue inhibitors of metalloproteinases (TIMPs). EEB was also found to recover the UVB-induced degradation of pro-collagen by upregulating Smad signaling. Moreover, EEB increased the mRNA expression of filaggrin, involucrin, and loricrin in UVB-irradiated human epidermal keratinocytes (HaCaT). EEB decreased UVB-induced reactive oxygen species (ROS) generation by upregulating glutathione peroxidase 1 (GPx1) and heme oxygenase-1 (HO-1) expression via nuclear factor erythroid-2-related factor 2 (Nrf2) activation in Hs68 cells. In a UVB-induced HR-1 hairless mouse model, the oral administration of EEB mitigated photoaging lesions including wrinkle formation, skin thickness, and skin dryness by downregulating MMP-1 production and upregulating the expression of pro-collagen type I alpha 1 chain (pro-COL1A1). Collectively, our findings revealed that EEB prevents UVB-induced skin damage by regulating MMP-1 and pro-collagen type I production through MAPK/AP-1 and Smad pathways.

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