scholarly journals Nail changes associated with pigmentary disorders

2021 ◽  
Vol 8 (2) ◽  
pp. 76
Author(s):  
Shikha Bansal ◽  
Chander Grover
Keyword(s):  
Pigmentary Disorders ◽  
Nail Changes

Distinctive Nail Changes in Advanced Hepatic Cirrhosis

1955 ◽  
Vol 29 (2) ◽  
pp. 258-261 ◽  
Author(s):  
Dennis A.J. Morey ◽  
James O. Burke
Keyword(s):  
Hepatic Cirrhosis ◽  
Nail Changes

Natural Tyrosinase Inhibitors: Role of Herbals in the Treatment of Hyperpigmentary Disorders

2019 ◽  
Vol 19 (10) ◽  
pp. 796-808 ◽  
Author(s):  
Kamal Uddin Zaidi ◽  
Sharique A. Ali ◽  
Ayesha Ali ◽  
Ishrat Naaz
Keyword(s):  
Critical Role ◽  
Enzymatic Browning ◽  
Melanin Production ◽  
Natural Sources ◽  
Pigmentary Disorders ◽  
Normal Manner ◽  
Abnormal Accumulation ◽  
Current Article ◽  
Tyrosinase Inhibitors

Cutaneous pigmentation plays critical role in determining the color of skin along with photo protection of skin from dreadful effects of ultraviolet radiations. Conversely, abnormal accumulation of melanin is responsible for hyper pigmentary disorders such as melasma, senile lentigines and freckles. Because of the visible nature of dermatologic diseases, they have a considerable psychosomatic effect on affected patients. Tyrosinase inhibitors are molecules that interrelate in some way with the enzyme to prevent it from working in the normal manner. Past many decades witnessed the quest for the development of natural tyrosinase inhibitors due to imperative role played by tyrosinase in the process of melanogenesis and fungi or fruit enzymatic browning. Mechanism of pigmentation is characterized by the intact process of the synthesis of specialized black pigment within melanosomes. Melanin is synthesized by a cascade of enzymatic and chemical reactions. For this reason, melanin production is mainly controlled by the expression and activation of tyrosinase. In the current article, we discussed tyrosinase inhibitors from the natural sources, which can be an essential constituent of cosmetics products and depigmenting agents for the treatment of hyperpigmentory disorders.

scholarly journals Melanogenesis Connection with Innate Immunity and Toll-Like Receptors

2020 ◽  
Vol 21 (24) ◽  
pp. 9769
Author(s):  
Saaya Koike ◽  
Kenshi Yamasaki
Keyword(s):  
Skin Pigmentation ◽  
Innate Immune ◽  
Mitogen Activated Protein Kinase ◽  
Ultraviolet Rays ◽  
Toll Like Receptors ◽  
Pigment Formation ◽  
Living Body ◽  
Pigmentary Disorders ◽  
Wide Range ◽  
Griscelli Syndrome

The epidermis is located in the outermost layer of the living body and is the place where external stimuli such as ultraviolet rays and microorganisms first come into contact. Melanocytes and melanin play a wide range of roles such as adsorption of metals, thermoregulation, and protection from foreign enemies by camouflage. Pigmentary disorders are observed in diseases associated with immunodeficiency such as Griscelli syndrome, indicating molecular sharing between immune systems and the machineries of pigment formation. Melanocytes express functional toll-like receptors (TLRs), and innate immune stimulation via TLRs affects melanin synthesis and melanosome transport to modulate skin pigmentation. TLR2 enhances melanogenetic gene expression to augment melanogenesis. In contrast, TLR3 increases melanosome transport to transfer to keratinocytes through Rab27A, the responsible molecule of Griscelli syndrome. TLR4 and TLR9 enhance tyrosinase expression and melanogenesis through p38 MAPK (mitogen-activated protein kinase) and NFκB signaling pathway, respectively. TLR7 suppresses microphthalmia-associated transcription factor (MITF), and MITF reduction leads to melanocyte apoptosis. Accumulating knowledge of the TLRs function of melanocytes has enlightened the link between melanogenesis and innate immune system.

scholarly journals A Review of Nail Changes in Acrokeratosis Paraneoplastica (Bazex Syndrome)

2021 ◽  
pp. 1-10
Author(s):  
Bipasha Roy ◽  
Shari R. Lipner
Keyword(s):  
Head And Neck ◽  
Squamous Cell ◽  
Clinical Presentation ◽  
Nail Plate ◽  
Squamous Cell Carcinomas ◽  
Morbidity And Mortality ◽  
Cutaneous Manifestations ◽  
Nail Changes ◽  
Paraneoplastic Dermatosis ◽  
Acrokeratosis Paraneoplastica Bazex

Acrokeratosis paraneoplastica (Bazex syndrome) is a rare paraneoplastic dermatosis associated with internal malignancies. Clinical presentation is characterized by erythematous or violaceous scaly plaques involving the digits, nose, ears, palms, and soles. Nail changes commonly present concurrently with cutaneous manifestations. In this review, we characterize nail changes associated with acrokeratosis paraneoplastica. A total of 48 cases were analyzed. Nail findings were nonspecific, with the most common being nail plate thickening, onycholysis, subungual hyperkeratosis, longitudinal ridging, discoloration, and nail plate loss. In most patients, nail changes involved the majority of fingernails and toenails and most often appeared prior to the diagnosis of malignancy. The most common associated underlying malignancies were squamous cell carcinomas of the head and neck. A diagnosis of acrokeratosis paraneoplastica should be considered in patients with onychodystrophy involving multiple nails with accompanying atypical psoriasiform dermatoses. Screening for internal malignancies may significantly decrease morbidity and mortality for these patients.

scholarly journals Elucidation of Melanogenesis-Associated Signaling Pathways Regulated by Argan Press Cake in B16 Melanoma Cells

Nutrients ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 2697
Author(s):  
Thouria Bourhim ◽  
Myra O. Villareal ◽  
Chemseddoha Gadhi ◽  
Hiroko Isoda
Keyword(s):  
Signaling Pathways ◽  
Press Cake ◽  
Global Gene Expression ◽  
Melanoma Cells ◽  
B16 Melanoma ◽  
Dependent Manner ◽  
Melanin Biosynthesis ◽  
B16 Melanoma Cells ◽  
Pigmentary Disorders ◽  
Argan Oil

The beneficial effect on health of argan oil is recognized worldwide. We have previously reported that the cake that remains after argan oil extraction (argan press-cake or APC) inhibits melanogenesis in B16 melanoma cells in a time-dependent manner without cytotoxicity. In this study, the global gene expression profile of B16 melanoma cells treated with APC extract was determined in order to gain an understanding of the possible mechanisms of action of APC. The results suggest that APC extract inhibits melanin biosynthesis by down-regulating microphthalmia-associated transcription factor (Mitf) and its downstream signaling pathway through JNK signaling activation, and the inhibition of Wnt/β-catenin and cAMP/PKA signaling pathways. APC extract also prevented the transport of melanosomes by down-regulating Rab27a expression. These results suggest that APC may be an important natural skin whitening product and pharmacological agent used for clinical treatment of pigmentary disorders.

Histopathology of functional pigmentary disorders

1979 ◽  
Vol 63 (3) ◽  
pp. 448
Author(s):  
Y. Mishima
Keyword(s):  
Pigmentary Disorders

Incidence of Adverse Cutaneous Reactions to Epidermal Growth Factor Receptor Inhibitors in Patients with Non-Small-Cell Lung Cancer

Dermatology ◽  
2021 ◽  
pp. 1-5
Author(s):  
Paolo Gisondi ◽  
Davide Geat ◽  
Alessandra Mattiucci ◽  
Fiorella Lombardo ◽  
Antonio Santo ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Epidermal Growth Factor Receptor ◽  
Growth Factor Receptor ◽  
Small Cell ◽  
Egfr Inhibitor ◽  
Small Cell Lung ◽  
Nail Changes ◽  
Cutaneous Reactions ◽  
Epidermal Growth ◽  
Oncologic Treatment

<b><i>Background:</i></b> Epidermal growth factor receptor (EGFR) inhibitors are routinely used in advanced non-small-cell lung cancer (NSCLC) harboring EGFR mutations. However, their use is associated with gastrointestinal and cutaneous toxicities, including acneiform eruptions, pruritus, xerosis, nail and hair changes. Aside from reducing patients’ quality of life, such cutaneous reactions have a considerable impact on the oncologic treatment given that dose reduction or even drug discontinuation may be necessary, especially for the severe forms. <b><i>Objectives:</i></b> To assess the incidence, impact on treatment and management of EGFR inhibitor-related cutaneous reactions in patients with NSCLC. <b><i>Methods:</i></b> We conducted a prospective observational study on 87 consecutive patients with advanced NSCLC treated with EGFR-tyrosine kinase inhibitors from January to December 2019. Patients who developed mucocutaneous reactions were evaluated and treated by both oncologists and dermatologists, and underwent dermatologic follow-up until resolution of the cutaneous reaction. Demographic and clinical data were collected for each patient, and the severity of the cutaneous reaction was graded using the Common Terminology Criteria for Adverse Events. <b><i>Results:</i></b> Seventy-one patients (81.6%) developed cutaneous reactions. The number of cutaneous reactions per patient was 1 in 37%, 2 in 41% and 3 or more in 22%. The most common cutaneous reactions included acneiform eruptions (56.3%), xerosis ± asteatotic eczema (48.3%), nail changes (39.1%), mucositis (29.9%), pruritus (24.1%) and hair changes (12.6%). Afatinib was associated with a higher rate of nail changes and mucositis (<i>p</i> &#x3c; 0.01 and <i>p</i> &#x3c; 0.005, respectively) compared to other agents, while no patient-related predictive factors were identified. Dose reduction was performed in 18% of patients. Multidisciplinary management involving dermatologists allowed to resume the drug in all patients who had discontinued it due to the cutaneous reactions. <b><i>Conclusions:</i></b> A multidisciplinary approach to EGFR inhibitor-related cutaneous reactions is advantageous and can reduce the need to discontinue oncologic treatment.

Nail changes in diabetes

2021 ◽  
Author(s):  
P. Yesudian ◽  
L. Nwabudike ◽  
D. de Berker
Keyword(s):  
Nail Changes

Dermoscopy of acquired pigmentary disorders: a comprehensive review

2021 ◽  
Author(s):  
Loren Krueger ◽  
Autumn Saizan ◽  
Jennifer A. Stein ◽  
Nada Elbuluk
Keyword(s):  
Comprehensive Review ◽  
Pigmentary Disorders

A woman with nail changes

BMJ ◽  
2020 ◽  
pp. l7007
Author(s):  
Yingyuan Yu ◽  
Yuling Shi
Keyword(s):  
Nail Changes
Sign in / Sign up

Export Citation Format

Share Document