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https://www.readbyqxmd.com/read/29694929/3-acetyl-8-methoxy-2-h-chromen-2-one-derived-schiff-bases-as-potent-antiproliferative-agents-insight-into-the-influence-of-4-n-substituents-on-the-in-vitro-biological-activity
#1
G Kalaiarasi, S Rex Jeya Rajkumar, G Aswini, S Dharani, Frank R Fronczek, R Prabhakaran
A series of 3-acetyl-8-methoxycoumarin appended thiosemicarbazones (1-4) was prepared from the reaction of 3-acetyl-8-methoxycoumarin with 4(N)-substituted thiosemicarbazides in a view of ascertaining their biological properties with the change of N-terminal substitution in the thiosemicarbazide moiety. Comprehensive characterization was brought about by various spectral and analytical methods. The molecular structures of all the compounds were determined by single crystal X-ray diffraction analysis. Binding studies with Calf thymus DNA (CT-DNA) and proteins such as Bovine Serum Albumin (BSA) and Human Serum Albumin (HSA) indicated an intercalative mode of binding with DNA and static quenching mechanism with proteins...
April 14, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29693970/expression-of-cdk6-in-oral-squamous-cell-carcinomas
#2
Azadeh Andisheh-Tadbir, Mohammad Javad Ashraf, Naghmeh Jeiroodi
Background: CDK6 is the key factor in regulation of the cell cycle and essential for passage into the G1 phase. It also plays an important role in the development of various tumors. In this cross-sectional study expression of the CDK6 protein in oral squamous cell carcinoma (OSCC) and healthy oral mucosa of controls was assessed to determine relations with malignant transformation and clinicopathologic factors. Method: A total of 60 samples, 45 from OSCCs and 15 from healthy tissue, underwent immunohistochemistry for CDK6...
April 25, 2018: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29693054/atypical-still-disease-with-necrotic-keratinocytes-a-histologic-mimicker-of-erythema-multiforme
#3
Trisha Khanna, Christine C Yang, Tarek Yamany, David N Silvers, Christine T Lauren, Jesse M Lewin
No abstract text is available yet for this article.
May 2018: JAAD Case Reports
https://www.readbyqxmd.com/read/29692858/-ecklonia-cava-extract-and-dieckol-attenuate-cellular-lipid-peroxidation-in-keratinocytes-exposed-to-pm10
#4
Jeong-Won Lee, Jin Kyung Seok, Yong Chool Boo
Airborne particulate matter can cause oxidative stress, inflammation, and premature skin aging. Marine plants such as Ecklonia cava Kjellman contain high amounts of polyphenolic antioxidants. The purpose of this study was to examine the antioxidative effects of E. cava extract in cultured keratinocytes exposed to airborne particulate matter with a diameter of <10  μ m (PM10). After the exposure of cultured HaCaT keratinocytes to PM10 in the absence and presence of E. cava extract and its constituents, cell viability and cellular lipid peroxidation were assessed...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29691866/gold-lotion-from-citrus-peel-extract-ameliorates-imiquimod-induced-psoriasis-like-dermatitis-in-murine
#5
Chi-Chien Lin, Jung-Ju Wu, Yi-Gen Pan, Ya-Hsuan Chao, Fang-Chu Lin, Ying-Ray Lee, Ching-Liang Chu
BACKGROUND: A natural mixed product Gold lotion (GL), which is made from the peels of six citrus fruits, has recently been identified to possess anti-oxidative, anti-inflammatory, and immunomodulatory effects. GL has been used to protect skin against UV-induced damage, but the activity to psoriasis, a chronic autoimmune skin disease caused by dysregulation between immune cells and keratinocytes, is not known. Thus, we evaluated the effect of GL on imiquimod (IMQ)-induced psoriasis-like inflammation in mice...
April 24, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29691864/foxo1-transcriptional-activities-in-vegf-expression-and-beyond-a-key-regulator-in-functional-angiogenesis
#6
Bin Ren
FoxO1 has emerged as an important regulator of angiogenesis. Recent work published in this Journal shows that FoxO1 regulates VEGF expression in keratinocytes and is required for angiogenesis in wound healing. Since FoxO1 also regulates CD36 transcription, and endothelial cell differentiation and vascular maturation, this transcription factor may be essential for the formation of functional vascular networks via coupling the regulation of CD36 in vascular endothelial cells under physiological and pathological conditions...
April 24, 2018: Journal of Pathology
https://www.readbyqxmd.com/read/29691121/stabilization-of-microtubules-restores-barrier-function-after-cytokine-induced-defects-in-reconstructed-human-epidermis
#7
Chiung-Yueh Hsu, Nicolas Lecland, Valérie Pendaries, Cécile Viodé, Daniel Redoulès, Carle Paul, Andreas Merdes, Michel Simon, Christiane Bierkamp
BACKGROUND: A variety of human skin disorders is characterized by defects in the epidermal barrier, leading to dehydration, itchiness, and rashes. Previously published literature suggests that microtubule stabilization at the cortex of differentiating keratinocytes is necessary for the formation of the epidermal barrier. OBJECTIVES: We tested whether stabilization of microtubules with paclitaxel or epothilone B can repair barrier defects that were experimentally induced in three-dimensional culture models of epidermis...
April 18, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29690804/expression-of-macrophage-migration-inhibitory-factor-in-footpad-skin-lesions-with-diabetic-neuropathy
#8
Sun Up Noh, Won-Young Lee, Won-Serk Kim, Yong-Taek Lee, Kyung Jae Yoon
Background Diabetic neuropathy (DN) originating in distal lower extremities is associated with pain early in the disease course, overwhelming in the feet. However, the pathogenesis of DN remains unclear. Macrophage migration inhibitory factor (MIF) has been implicated in the onset of neuropathic pain and the development of diabetes. Objective of this study was to observe pain syndromes elicited in the footpad of DN rat model and to assess the contributory role of MIF in the pathogenesis of DN. Methods DN was made in SD rats by streptozotocin (STZ)...
January 1, 2018: Molecular Pain
https://www.readbyqxmd.com/read/29690702/-influencing-factors-for-keratinized-differentiation-of-keratinocytes
#9
X X Ding, X Li, J Wang, X M Gu, A Q Wu, Y M Zhou
Keratinized mucosa in oral cavity plays an important role in periodontal health. The defect of keratinized mucosa may increase the risks of complication of oral implant surgery and restoration. Graft of keratinized tissue and connective tissue are still the gold standard for treating keratinized mucosa defect now. The current research focus on how to modulate non-keratinized mucosa to highly-efficient and minimally-invasive keratinized mucosa. Keratinocytes are critical components of oral mucosa and its final differentiation into keratinized mucosa is controlled by the connective tissue microenvironment involving a variety of molecules and ions...
April 9, 2018: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/29689250/card14-gain-of-function-mutation-alone-is-sufficient-to-drive-il-23-il-17-mediated-psoriasiform-skin-inflammation-in-vivo
#10
Mark Mellett, Barbara Meier, Deepa Mohanan, Rebekka Schairer, Phil Cheng, Takashi K Satoh, Betina Kiefer, Caroline Ospelt, Stephan Nobbe, Margot Thome, Emmanuel Contassot, Lars E French
Rare autosomal dominant mutations in the gene encoding the keratinocyte signaling molecule, Caspase Recruitment Domain-Containing Protein 14 (CARD14), have been associated with an increased susceptibility to psoriasis but the physiological impact of CARD14 gain-of-function mutations remains to be fully determined in vivo. Here, we report that heterozygous mice harboring a CARD14 gain-of-function mutation (Card14ΔE138) spontaneously develop a chronic psoriatic phenotype with characteristic scaling skin lesions, epidermal thickening, keratinocyte hyperproliferation, hyperkeratosis and immune cell infiltration...
April 21, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29689138/histopathological-patterns-in-dermatitis-artefacta
#11
REVIEW
Jörg Tittelbach, Melanie Peckruhn, Peter Elsner
BACKGROUND: Dermatitis artefacta is a relevant and frequently unrecognized clinical condition associated with self-harming behavior, in which unconscious manipulation causes skin lesions. While atypical lesions and an unusual disease course may give rise to clinical suspicion of a self-induced disorder, questioning and examining these patients usually fails to confirm or clarify this suspicion. In this setting, the dermatopathologist may be faced with the question whether there are any histological signs corroborating the diagnosis of dermatitis artefacta...
April 24, 2018: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/29687193/development-of-microemulsions-and-microemulgels-for-enhancing-transdermal-delivery-of-kaempferia-parviflora-extract
#12
Worranan Rangsimawong, Paisit Wattanasri, Prasopchai Tonglairoum, Prasert Akkaramongkolporn, Theerasak Rojanarata, Tanasait Ngawhirunpat, Praneet Opanasopit
The purpose of this research was to develop microemulsions (ME) and microemulgels (MG) for enhancing transdermal delivery of Kaempferia parviflora (KP) extract. The methoxyflavones were used as markers. Various formulations of ME and MG containing 10% w/v KP extract were prepared, and the in vitro skin permeation and deposition were investigated. The potential ME system containing oleic acid (5% w/v), Tween 20 (20% w/v), PG (40% w/v), and water (35% w/v) was successfully formulated. ME with 10% w/v limonene (ME-L10%) showed higher methoxyflavones flux than ME-L5%, ME-L1%, ME without limonene, and KP extract in water, respectively...
April 23, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29686772/effects-of-7-mega-tm-500-on-oxidative-stress-inflammation-and-skin-regeneration-in-h-2-o-2-treated-skin-cells
#13
In-Bong Song, Hyejung Gu, Hye-Ju Han, Na-Young Lee, Ji-Yun Cha, Yeon-Kyong Son, Jungkee Kwon
Environmental stimuli can lead to the excessive accumulation of reactive oxygen species (ROS), which is one of the risk factors for premature skin aging. Here, we investigated the protective effects of 7-MEGATM 500 (50% palmitoleic acid, 7-MEGA) against oxidative stress-induced cellular damage and its underlying therapeutic mechanisms in the HaCaT human skin keratinocyte cell line (HaCaT cells). Our results showed that treatment with 7-MEGA prior to hydrogen peroxide (H2 O2 )-induced damage significantly increased the viability of HaCaT cells...
April 2018: Toxicological Research
https://www.readbyqxmd.com/read/29685904/role-of-fgfr2b-in-the-crosstalk-between-autophagy-and-differentiation-involvement-of-jnk-signaling
#14
Monica Nanni, Danilo Ranieri, Benedetta Rosato, Maria Rosaria Torrisi, Francesca Belleudi
The FGFR2b is a receptor tyrosine kinase expressed exclusively in epithelial cells. We previously demonstrated that FGFR2b induces autophagy and that this process is required for the triggering of FGFR2b-mediated keratinocytes early differentiation. However, the molecular mechanisms regulating this interplay remain to be elucidated. Since we have also recently shown that JNK1 signaling is involved in FGFR2b-induced autophagy and a possible role of JNK pathway in epidermal differentiation has been suggested but it is still debated, here we investigated the crosstalk between FGFR2b-mediated autophagy and differentiation focusing on the downstream JNK signaling...
April 23, 2018: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/29685575/interactions-between-surfactants-and-the-skin-theory-and-practice
#15
REVIEW
Artur Seweryn
One of the primary causes of skin irritation is the use of body wash cosmetics and household chemicals, since they are in direct contact with the skin, and they are widely available and frequently used. The main ingredients of products of this type are surfactants, which may have diverse effects on the skin. The skin irritation potential of surfactants is determined by their chemical and physical properties resulting from their structure, and specific interactions with the skin. Surfactants are capable of interacting both with proteins and lipids in the stratum corneum...
April 13, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29684510/the-rodent-tibia-fracture-model-a-critical-review-and-comparison-with-the-complex-regional-pain-syndrome-literature
#16
REVIEW
Frank Birklein, Alaa Ibrahim, Tanja Schlereth, Wade S Kingery
Distal limb fracture is the most common cause of complex regional pain syndrome (CRPS), thus the rodent tibia fracture model (TFM) was developed to study CRPS pathogenesis. This comprehensive review summarizes the published TFM research and compares these experimental results with the CRPS literature. The TFM generated spontaneous and evoked pain behaviors, inflammatory symptoms (edema, warmth) and trophic changes (skin thickening, osteoporosis) resembling symptoms in early CRPS. Neuropeptides, inflammatory cytokines, and nerve growth factor (NGF) have been linked to pain behaviors, inflammation, and trophic changes in the TFM model and proliferating keratinocytes were identified as the primary source of cutaneous cytokines and NGF...
April 20, 2018: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/29683455/three-dimensional-inflammatory-human-tissue-equivalents-of-gingiva
#17
Li Xiao, Hisashi Okamura, Yasuo Kumazawa
Periodontal diseases (such as gingivitis and periodontitis) are the leading causes of tooth loss in adults. Inflammation in gingiva is the fundamental physiopathology of periodontal diseases. Current experimental models of periodontal diseases have been established in various types of animals. However, the physiopathology of animal models is different from that of humans, making it difficult to analyze cellular and molecular mechanisms and evaluate new medicines for periodontal diseases. Here, we present a detailed protocol for reconstructing human inflammatory tissue equivalents of gingiva (iGTE) in vitro...
April 3, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29682159/age-dependent-protective-effect-of-selenium-against-uva-irradiation-in-primary-human-keratinocytes-and-the-associated-dna-repair-signature
#18
C Favrot, D Beal, E Blouin, M T Leccia, A M Roussel, W Rachidi
Few studies have focused on the protective role of selenium (Se) against skin aging and photoaging even though selenoproteins are essential for keratinocyte function and skin development. To the best of our knowledge, the impact of Se supplementation on skin cells from elderly and young donors has not been reported. Therefore, the main objective of our study was to evaluate the effects of Se supplementation on skin keratinocytes at baseline and after exposure to ultraviolet A (UVA) irradiation. Low doses of Se (30 nM) were very potently protective against UVA-induced cytotoxicity in young keratinocytes, whereas the protection efficiency of Se in old keratinocytes required higher concentrations (240 nM)...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29679854/thymol-attenuates-the-worsening-of-atopic-dermatitis-induced-by-staphylococcus-aureus-membrane-vesicles
#19
Hyo Il Kwon, Na Hee Jeong, So Hyun Jun, Joo Hee Son, Shukho Kim, Hyejin Jeon, Sun Chul Kang, Sang Hyun Kim, Je Chul Lee
Staphylococcus aureus membrane vesicles (MVs) aggravate atopic dermatitis (AD) through the delivery of bacterial effector molecules to host cells and the stimulation of inflammatory responses. This study investigated the inhibitory effect of thymol, a phenolic monoterpene found in essential oils derived from plants, on the worsening of AD induced by S. aureus MVs both in vitro and in vivo. The sub-minimal inhibitory concentrations of thymol disrupted S. aureus MVs. Intact S. aureus MVs induced the expression of pro-inflammatory cytokine (interleukin (IL)-1β, IL-6, and tumor necrosis factor-α) and chemokine (IL-8 and monocyte chemoattractant protein-1) genes in cultured keratinocytes, whereas thymol-treated S...
April 18, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29679067/psychological-stress-deteriorates-skin-barrier-function-by-activating-11%C3%AE-hydroxysteroid-dehydrogenase-1-and-the-hpa-axis
#20
Sung Jay Choe, Donghye Kim, Eun Jung Kim, Joung-Sook Ahn, Eun-Jeong Choi, Eui Dong Son, Tae Ryong Lee, Eung Ho Choi
Psychological stress (PS) increases endogenous glucocorticoids (GC) by activating the hypothalamic-pituitary-adrenal axis. The negative effects of GC on skin barrier function under PS have been well-established. However, endogenous GC can also be active when cortisone (inactive form) is converted to cortisol (active form) by 11β-hydroxysteroid dehydrogenase type I (11ß-HSD1) in the peripheral tissue. Here, we evaluated the changes in 11ß-HSD1 and barrier function under PS. Elevated 11ß-HSD1 in oral mucosa correlated with increased cortisol in the stratum corneum and deteriorated barrier function...
April 20, 2018: Scientific Reports
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