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https://www.readbyqxmd.com/read/29019940/effects-of-extremely-low-frequency-electromagnetic-fields-on-melanogenesis-through-p-erk-and-p-sapk-jnk-pathways-in-human-melanocytes
#1
Yu-Mi Kim, Sang-Eun Cho, Soo-Chan Kim, Hyun-Joon Jang, Young-Kwon Seo
This study evaluated frequency-dependent effects of extremely low frequency electromagnetic fields (ELF-EMFs) on melanogenesis by melanocytes in vitro. Melanocytes were exposed to 2 mT EMFs at 30-75 Hz for 3 days before melanogenesis was examined. Exposure to ELF-EMFs at 50 and 60 Hz induced melanogenic maturation without cell damage, without changing cell proliferation and mitochondrial activity. Melanin content and tyrosinase activity of cells exposed to 50 Hz were higher than in controls, and mRNA expression of tyrosinase-related protein-2 was elevated relative to controls at 50 Hz...
October 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28973148/a-constitutive-bcl2-down-regulation-aggravates-the-phenotype-of-pkd1-mutant-induced-polycystic-kidney-disease
#2
Laurence Duplomb, Nathalie Droin, Olivier Bouchot, Christel Robinet Thauvin, Ange-Line Bruel, Julien Thevenon, Patrick Callier, Guillaume Meurice, Noémie Pata-Merci, Romaric Loffroy, David Vandroux, Romain Da Costa, Virginie Carmignac, Eric Solary, Laurence Faivre
The main identified function of BCL2 protein is to prevent cell death by apoptosis. Mice knock-out for Bcl2 demonstrate growth retardation, severe polycystic kidney disease (PKD), gray hair and lymphopenia, and die prematurely after birth. Here, we report a 40-year-old male referred to for abdominal and thoracic aortic dissection with associated aortic root aneurysm, PKD, lymphocytopenia with a history of T cell lymphoblastic lymphoma, white hair since the age of 20, and learning difficulties. PKD, which was also detected in the father and sister, was related to an inherited PKD1 mutation...
September 11, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28928092/idh2-deficiency-accelerates-renal-dysfunction-in-aged-mice
#3
Su Jeong Lee, Hanvit Cha, Seoyoon Lee, Hyunjin Kim, Hyeong Jun Ku, Sung Hwan Kim, Jung Hyun Park, Jin Hyup Lee, Kwon Moo Park, Jeen-Woo Park
The free radical or oxidative stress theory of aging postulates that senescence is due to an accumulation of cellular oxidative damage, caused largely by reactive oxygen species (ROS) that are produced as by-products of normal metabolic processes in mitochondria. The oxidative stress may arise as a result of either increased ROS production or decreased ability to detoxify ROS. The availability of the mitochondrial NADPH pool is critical for the maintenance of the mitochondrial antioxidant system. The major enzyme responsible for generating mitochondrial NADPH is mitochondrial NADP(+)-dependent isocitrate dehydrogenase (IDH2)...
November 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28884913/a-girl-with-gray-hair-and-pyogenic-infections
#4
Sara Palencia-Pérez, Fátima Tous-Romero, Ana María Delgado-Márquez
No abstract text is available yet for this article.
September 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28761265/light-microscopy-and-polarized-microscopy-a-dermatological-tool-to-diagnose-gray-hair-syndromes
#5
P L Chandravathi, Hetal Deepak Karani, Sirisha Rani Siddaiahgari, Lokesh Lingappa
Gray hair syndromes are rare syndromes which have an autosomal recessive inheritance and are characterized by pigmentary dilution of skin and hair, defects in immunological function, and nervous system defects. They comprise three disorders namely Chediak-Higashi syndrome (CHS), Griscelli syndrome (GPS), and Elejalde syndrome. Clinically, it is difficult to distinguish these disorders as their clinical features may overlap. Hence, to make a correct diagnosis and differentiate between CHS and GPS light microscopic examination of skin and hair shafts as well as peripheral blood smear evaluations should be done...
January 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28649248/a-combination-of-podophyllotoxin-and-rutin-alleviates-radiation-induced-pneumonitis-and-fibrosis-through-modulation-of-lung-inflammation-in-mice
#6
Savita Verma, Bhargab Kalita, Sania Bajaj, Hridayesh Prakash, Ajay Kumar Singh, Manju Lata Gupta
Pneumonitis and pulmonary fibrosis are predominant consequences of radiation exposure, whether planned or accidental. The present study, demonstrates radioprotective potential of a formulation, prepared by combining podophyllotoxin and rutin (G-003M), in mice exposed to 11 Gy thoracic gamma radiation (TGR). Treated mice were observed for survival and other symptomatic features. Formation of reactive oxygen species (ROS)/nitric oxide (NO) was measured in bronchoalveolar lavage cells. DNA damage and cell death were assessed in alveolar cells by terminal deoxynucleotidyl transferase dUTP nick-end labeling assay...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28649126/cis-stilbene-glucoside-in-polygonum-multiflorum-induces-immunological-idiosyncratic-hepatotoxicity-in-lps-treated-rats-by-suppressing-ppar-%C3%AE
#7
Ya-Kun Meng, Chun-Yu Li, Rui-Yu Li, Lan-Zhi He, He-Rong Cui, Ping Yin, Cong-En Zhang, Peng-Yan Li, Xiu-Xiu Sang, Ya Wang, Ming Niu, Ya-Ming Zhang, Yu-Ming Guo, Rong Sun, Jia-Bo Wang, Zhao-Fang Bai, Xiao-He Xiao
The root of Polygonum multiflorum Thunb (PM) has been used in China to treat a variety of diseases, such as constipation, early graying of the hair and hyperlipemia. Recent evidence shows that PM causes idiosyncratic drug-induced liver injury (IDILI) in humans. In this study, we investigated the molecular basis of PM-induced liver injury in a rat model of IDILI based on a non-hepatotoxic dose of LPS. SD rats were orally administered 3 potentially hepatotoxic compounds of PM: cis-stilbene glucoside (cis-SG, 50 mg/kg), trans-SG (50 mg/kg) or emodin (5 mg/kg), followed by injection of LPS (2...
October 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28598005/higher-concentrations-of-dithranol-appear-to-induce-hair-growth-even-in-severe-alopecia-areata
#8
M R Ngwanya, N A Gray, F Gumedze, A Ndyenga, N P Khumalo
Alopecia areata (AA) is the commonest autoimmune cause of non-scarring alopecia. Topical treatments including corticosteroids and irritants maybe beneficial. Studies report variable hair regrowth with dithranol (anthralin) but all used low concentrations (0.1-1.25%) and inconsistent measurements of AA severity. We report retrospective data (2005-2014) of 102 patients who had failed ultra-potent topical steroids and were referred to a specialist hair clinic for treatment with dithranol up to 3%. The severity of alopecia areata tool was used and participants graded as mild (<25%), moderate (>25 to 75%), and severe (>75%) hair loss...
July 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/28593683/aging-in-hair-follicle-stem-cells-and-niche-microenvironment
#9
REVIEW
Jiang Ji, Bryan Siu-Yin Ho, Ge Qian, Xiao-Ming Xie, Paul Lorenz Bigliardi, Mei Bigliardi-Qi
Hair graying and hair loss are prominent and common characteristics of the elderly population. In some individuals these processes can significantly impact their quality of life, leading to depression, anxiety and other serious mental health problems. Accordingly, there has been much interest in understanding the complex physiological changes within the hair follicle in the aging individual. It is now known that hair follicles represent a prototypical stem cell niche, where both micro- and macroenvironmental influences are integrated alongside stem cell-stem cell and stem cell-stem niche interactions to determine hair growth or hair follicle senescence...
June 8, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28587535/a-fatal-case-of-hypothermia-caused-by-dog-bites
#10
Yanning Li, Ruipeng Shen, Runtao Ding, Gehua Wen, Ao Du, Zhibin Dong, Xinghua Ren, Hui Yao, Baoli Zhu, Rubo Li, Yan Lu, Xu Wu
Death from hypothermia usually *We presented a fatal case of hypothermia after being bitten by dog in this article. occurs among people exposed to cold and humid environmental conditions when they are homeless, aged, suffering from natural or psychiatric diseases and drug or alcohol intoxication. A normal healthy person dying from hypothermia due to dog bites is unusual and rare. Here, we present a fatal case of hypothermia following dog bites causing blood loss and multiple wounds on the body. A 56-year-old man was found dead in a remote roadside puddle of a small village, early in the morning...
January 1, 2017: Medicine, Science, and the Law
https://www.readbyqxmd.com/read/28584374/demographic-characteristics-and-association-of-serum-vitamin-b12-ferritin-and-thyroid-function-with-premature-canities-in-indian-patients-from-an-urban-skin-clinic-of-north-india-a-retrospective-analysis-of-71-cases
#11
Sidharth Sonthalia, Adity Priya, Desmond J Tobin
BACKGROUND: The incidence of self-reported premature hair graying (PHG) seems to be on the rise. PHG has a profound impact on the patient's quality of life. It remains an incompletely understood etiology with limited and modest treatment options. AIM: The evaluation of the demographic and clinical profile of patients with premature canities, and exploration of the association of this entity with certain systemic disorders suspected to be related to its etiology...
May 2017: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/28492012/gray-hair-silver-linings-and-the-wds
#12
EDITORIAL
Jane M Grant-Kels
No abstract text is available yet for this article.
September 2016: International Journal of Women's Dermatology
https://www.readbyqxmd.com/read/28484254/crispr-cas9-mediated-mutation-of-tyrosinase-tyr-3-utr-induce-graying-in-rabbit
#13
Yuning Song, Yuxin Xu, Jichao Deng, Mao Chen, Yi Lu, Yong Wang, Haobin Yao, Lina Zhou, Zhiquan Liu, Liangxue Lai, Zhanjun Li
The 3' untranslated regions (UTRs), located at the end of mRNA molecules, are believed to play a role in RNA replication and/or protein translation. Mutations in the tyrosinase (Tyr) gene are known to cause recessive albinism in humans and other species. In this study, to test whether the CRISPR/Cas9 system works on the mutation of the UTRs regulatory region in rabbit, the 3' UTR of the rabbit Tyr gene was deleted by a dual sgRNA directed CRISPR/Cas9 system. As expected, gray coat color and reduced melanin in hair follicles and irises was found in the mutated rabbit, thus increasing confidence in the association of the mutation of the Tyr 3' UTR with graying in rabbit...
May 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28386175/quantitative-evaluation-methods-of-skin-condition-based-on-texture-feature-parameters
#14
Hui Pang, Tianhua Chen, Xiaoyi Wang, Zhineng Chang, Siqi Shao, Jing Zhao
In order to quantitatively evaluate the improvement of the skin condition after using skin care products and beauty, a quantitative evaluation method for skin surface state and texture is presented, which is convenient, fast and non-destructive. Human skin images were collected by image sensors. Firstly, the median filter of the 3 × 3 window is used and then the location of the hairy pixels on the skin is accurately detected according to the gray mean value and color information. The bilinear interpolation is used to modify the gray value of the hairy pixels in order to eliminate the negative effect of noise and tiny hairs on the texture...
March 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28357534/the-relationship-between-microstructural-alterations-of-the-brain-and-clinical-measurements-in-children-and-adolescents-with-hair-pulling-disorder
#15
Geon Ho Bahn, Minha Hong, Kyung Mi Lee, Chanhee Lee, Chang-Woo Ryu, Ji-Ah Lee, Soonchan Park, Eui Jong Kim, Geon-Ho Jahng
Several studies have evaluated gray matter abnormalities and white matter integrity in adults with hair pulling disorder (HPD). However, no prior studies have defined the relationship between neuroimaging parameters and clinical measurements in children and adolescents with HPD. The purposes of this study were to determine the correlation between magnetic resonance imaging (MRI) indices and clinical measurements in children and adolescents with HPD, and to compare HPD patients with age- and sex- matched healthy controls (HC)...
March 29, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28357189/griscelli-syndrome-subtype-2-with-hemophagocytic-lympho-histiocytosis-a-case-report-and-review-of-literature
#16
Priyanka Minocha, Richa Choudhary, Anika Agrawal, Sadasivan Sitaraman
Griscelli syndrome (GS) is a rare autosomal recessive disorder resulting in pigmentary dilution of the skin and hair with variable phenotypes depending upon subtypes. Mutations in 3 distinct genes MYO5A, RAB27A, MLPH are responsible for 3 subtypes (GS1, GS2, and GS3) of GS respectively. GS subtype 2 commonly develops hemophagocytic lymphohistiocytosis (HLH) and recurrent infections due to immunodeficiency. We hereby report a 20 month old male child presenting with silvery gray hair, hypomelanosis and features of hemophagocytosis...
February 2017: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/28249010/tfap2-paralogs-regulate-melanocyte-differentiation-in-parallel-with-mitf
#17
Hannah E Seberg, Eric Van Otterloo, Stacie K Loftus, Huan Liu, Greg Bonde, Ramakrishna Sompallae, Derek E Gildea, Juan F Santana, J Robert Manak, William J Pavan, Trevor Williams, Robert A Cornell
Mutations in the gene encoding transcription factor TFAP2A result in pigmentation anomalies in model organisms and premature hair graying in humans. However, the pleiotropic functions of TFAP2A and its redundantly-acting paralogs have made the precise contribution of TFAP2-type activity to melanocyte differentiation unclear. Defining this contribution may help to explain why TFAP2A expression is reduced in advanced-stage melanoma compared to benign nevi. To identify genes with TFAP2A-dependent expression in melanocytes, we profile zebrafish tissue and mouse melanocytes deficient in Tfap2a, and find that expression of a small subset of genes underlying pigmentation phenotypes is TFAP2A-dependent, including Dct, Mc1r, Mlph, and Pmel...
March 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28237301/aging-and-wave-component-latency-delays-in-ovemp-and-cvemp-a-systematic-review-with-meta-analysis
#18
REVIEW
Ysa Karen Dos Santos Macambira, Aline Tenório Lins Carnaúba, Luciana Castelo Branco Camurça Fernandes, Nassib Bezerra Bueno, Pedro de Lemos Menezes
INTRODUCTION: The natural aging process may result in morphological changes in the vestibular system and in the afferent neural pathway, including loss of hair cells, decreased numbers of vestibular nerve cells, and loss of neurons in the vestibular nucleus. Thus, with advancing age, there should be a decrease in amplitudes and an increase in latencies of the vestibular evoked myogenic potentials, especially the prolongation of p13 latency. Moreover, many investigations have found no significant differences in latencies with advancing age...
July 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28217548/polygonum-multiflorum-root-extract-as-a-potential-candidate-for-treatment-of-early-graying-hair
#19
Nguyen Dinh Thang, Pham Ngoc Diep, Pham Thi Huong Lien, Le Thi Lien
Despite Polygonum multiflorum (PM) has been experiencely used as a drug to treat early graying hair phenomenon in Asian countries for a long time, there is limited study examined the real biological effects of PM on hair graying in vitro and in vivo. In this study, we investigated the effects of PM root extract (PM-RE) on melanin synthesis in human melanoma SKMEL-28 cells and embryos/larvae of wild-type strain AB zebrafish. We also preliminary revealed the molecular mechanism of early hair graying phenomenon in both in vitro and in vivo models...
January 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/28135675/blunted-hpa-axis-activity-prior-to-suicide-attempt-and-increased-inflammation-in-attempters
#20
Nadine M Melhem, Sara Munroe, Anna Marsland, Katarina Gray, David Brent, Giovanna Porta, Antoine Douaihy, Mark L Laudenslager, Frank DePietro, Rasim Diler, Henry Driscoll, Priya Gopalan
BACKGROUND: Hypothalamic-Pituitary-Adrenal (HPA) axis dysregulation is associated with increased risk for suicidal behavior. However, it is not clear whether such dysregulation exists prior to or is a consequence of attempt. Studies also show an activation of inflammatory responses in suicidal behavior but often combine attempters with those with ideation. METHODS: The sample consisted of psychiatric inpatients, aged 15-30 years, admitted for suicide attempt (SA, n=38), inpatients admitted for suicidal ideation with no prior history of attempts (SI, n=40), and healthy controls (n=37)...
March 2017: Psychoneuroendocrinology
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