Results 51 to 60 of about 2,960,448 (354)

A case of acanthosis nigricans in a HIV-infected patient [PDF]

, 2020
Background: To date, very little information is available concerning the relationship between acanthosis nigricans (AN) and infection with human immunodeficiency virus type 1 (HIV-1).
De Vincentiis, Ludovica, Di Paolo, Marcello, Iacovelli, Alessandra, Mezzaroma, Ivano, Palange, Paolo, Soda, Giuseppe   +5 more
core   +1 more source

Genetic deciphering of the antagonistic activities of the melanin-concentrating hormone and melanocortin pathways in skin pigmentation.

PLoS Genetics, 2020
The genetic origin of human skin pigmentation remains an open question in biology. Several skin disorders and diseases originate from mutations in conserved pigmentation genes, including albinism, vitiligo, and melanoma.
Romain Madelaine, Keri J Ngo, Gemini Skariah, Philippe Mourrain   +3 more
doaj   +1 more source

Biology of melanocytes in mammals

Frontiers in Cell and Developmental Biology, 2023
Melanocytes, which originate from the neuroectoderm, are specialized cells responsible for producing pigments and possessing a dendritic morphology. These cells migrate to the epidermis and follicles, contributing to skin and hair pigmentation during ...
Ying-Zhe Cui, Xiao-Yong Man
doaj   +1 more source

Focal Scalp Hair Heterochromia in an Infant

Sultan Qaboos University Medical Journal, 2017
Hair heterochromia involves the presence of two different non-artificially induced colours of hair in the same individual which can be due to either iron deficiency anaemia, genetic mutations or mosaicism.
Pramod Kumar
doaj   +1 more source

The Emerging Role of Visible Light in Melanocyte Biology and Skin Pigmentary Disorders: Friend or Foe?

Journal of Clinical Medicine, 2023
Electromagnetic radiation, notably visible light (VL), has complicated effects on human skin, particularly pigmentation, which have been largely overlooked.
Xuanxuan He, Shanglin Jin, Xiaoxi Dai, Li Chen, L. Xiang, Chengfeng Zhang   +5 more
semanticscholar   +1 more source

Melanin Transfer in the Epidermis: The Pursuit of Skin Pigmentation Control Mechanisms

International Journal of Molecular Sciences, 2021
The mechanisms by which the pigment melanin is transferred from melanocytes and processed within keratinocytes to achieve skin pigmentation remain ill-characterized.
H. Moreiras, M. Seabra, Duarte C. Barral
semanticscholar   +1 more source

Piebaldism – portraits of hereditary character: a series of cases [PDF]

Surgical & Cosmetic Dermatology
Piebaldism is a rare, autosomal dominant dyschromia characterized by circumscribed poliosis and triangular achromia in the frontal region in 90% of affected individuals, with no other systemic involvement.
Melissa de Almeida Corrêa Alfredo, Ingrid Rocha Meireles Holanda, Ivanka Miranda Castro, Gabriela Roncada Haddad   +3 more
doaj   +1 more source

Occurrence of acute oesophageal necrosis (black oesophagus) in a single tertiary centre [PDF]

, 2019
Acute oesophageal necrosis (AON) is a rare condition characterised by the endoscopic finding of diffuse, circumferential, black mucosal pigmentation of the oesophagus, which typically stops at the gastro-oesophageal junction.
Annibale, Bruno, Carabotti, Marilia, Corleto, Vito Domenico, DI GIULIO, Emilio, Esposito, Gianluca, Orlando, Davide, Ruggeri, Maurizio   +6 more
core   +1 more source

Skin Pigmentation Abnormalities and Their Possible Relationship with Skin Aging

International Journal of Molecular Sciences, 2021
Skin disorders showing abnormal pigmentation are often difficult to manage because of their uncertain etiology or pathogenesis. Abnormal pigmentation is a common symptom accompanying aging skin.
Ai-Young Lee
semanticscholar   +1 more source

Polaronic and Electrochemical Signatures in Group IVB (Ti, Zr, Hf) Oxides: Unified SKP–DFT Insights for Tunable Transport in Energy and Electronic Devices

Advanced Functional Materials, EarlyView.
Charge carrier concentration and mobility in TiO2, ZrO2, and HfO2 powder films are experimentally mapped as a function of temperature. The results uncover polaron‐mediated transport regimes and field‐activated conduction, enabling the design of oxide‐based electronic and energy devices with thermally tunable functionality.
Beatriz Moura Gomes, Júlia Holtz, Maria Luís Pinto, Maria Helena Braga   +3 more
wiley   +1 more source