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Ethnic hair

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https://www.readbyqxmd.com/read/28692446/ethnicity-and-arterial-stiffness-in-children-and-adolescents-from-a-brazilian-population
#1
Divanei Zaniqueli, Rafael O Alvim, Sara G Luiz, Polyana R Oliosa, Roberto de Sá Cunha, José G Mill
BACKGROUND: Increased stiffness of large arteries is an important determinant of cardiovascular disease risk. Higher values of arterial stiffness measured by carotid-femoral pulse wave velocity (cf-PWV) have been measured in adult African-Americans compared with whites. Studies assessing ethnic differences in cf-PWV among children and adolescents are scarce. This study sought to evaluate the association between ethnicity and cf-PWV in Brazilian children and adolescents. METHODS: Seven hundred and seventy-one children and adolescents (211 blacks and 560 nonblacks, 11...
July 7, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28690485/a-novel-pathogenic-variant-in-the-mitf-gene-segregating-with-a-unique-spectrum-of-ocular-findings-in-an-extended-iranian-waardenburg-syndrome-kindred
#2
Nazanin Jalilian, Mohammad A Tabatabaiefar, Tayyeb Bahrami, Golaleh Karbasi, Mohammad H Bahramian, Abdolrahman Salimpoor, Mohammad R Noori-Daloii
Waardenburg syndrome (WS) is a rare genetic disorder characterized by abnormal pigmentation of the hair, skin, and iris as well as sensorineural hearing loss. WS is subdivided into 4 major types (WS1-4), where WS2 is characterized by the absence of dystopia canthorum. This study was launched to investigate clinical and molecular characteristics of WS in an extended Iranian WS2 family. A comprehensive clinical investigation was performed. Peripheral blood samples were collected and genomic DNA was extracted...
June 2017: Molecular Syndromology
https://www.readbyqxmd.com/read/28661938/age-at-pubertal-onset-in-girls-and-tobacco-smoke-exposure-during-pre-and-post-natal-susceptibility-windows
#3
Gayle C Windham, Raymond Lum, Robert Voss, Mary Wolff, Susan M Pinney, Susan L Teteilbaum, Connie S Sosnoff, Dina Dobraca, Frank Biro, Robert A Hiatt, Louise C Greenspan, Maida Galvez, Lawrence H Kushi
BACKGROUND: Tobacco smoke contains known hormonally active chemicals and reproductive toxicants. Several studies have examined prenatal maternal smoking and offspring age at menarche, but few examined earlier pubertal markers, nor accounted for exposure during childhood. Our objective was to examine pre- and post-natal smoke exposure in relation to timing of early pubertal events. METHODS: An ethnically diverse cohort of 1239 girls was enrolled at age 6-8 years for a longitudinal study of puberty at three U...
June 28, 2017: Epidemiology
https://www.readbyqxmd.com/read/28660406/evaluation-of-potentially-prolactin-related-adverse-events-and-sexual-maturation-in-adolescents-with-schizophrenia-treated-with-paliperidone-extended-release-er-for-2-years-a-post-hoc-analysis-of-an-open-label-multicenter-study
#4
Srihari Gopal, Rosanne Lane, Isaac Nuamah, Margaret Copenhaver, Jaskaran Singh, David Hough, Mark Bach, Adam Savitz
BACKGROUND: Elevated prolactin levels (hyperprolactinemia) are a frequent adverse effect of antipsychotic medications, especially in young populations. Prolonged hyperprolactinemia may affect sexual functioning and the onset and progression of puberty. OBJECTIVE: This study assessed potentially prolactin-related treatment-emergent adverse events (PPRL-TEAEs) and sexual maturation during long-term treatment of adolescents with paliperidone extended-release (ER). METHODS: This post hoc analysis of a 2-year open-label multicenter study (NCT00488319) included patients of either sex aged 12-17 years at study enrollment, diagnosed with schizophrenia (Diagnostic and Statistical Manual of Mental Disorders, 4th edition [DSM-IV]) for ≥1 year, who had received one or more adequate antipsychotic treatment prior to enrollment but had not responded sufficiently...
June 28, 2017: CNS Drugs
https://www.readbyqxmd.com/read/28638587/association-between-helicobacter-pylori-infection-and-alopecia-areata-a-study-in-iranian-population
#5
Elham Behrangi, Parvin Mansouri, Shahram Agah, Nasser Ebrahimi Daryani, Marjan Mokhtare, Zahra Azizi, Mona Ramezani Ghamsari, Masoumeh Rohani Nasab, Zahra Azizian
BACKGROUND Alopecia areata is an immune mediated inflammatory hair loss, which occurs in all ethnic and age groups, and both sexes. However no significant etiology has been known for this disease. Helicobacter pylori (H. pylori) , is an organism colonized in gastric mucosa. This bacterium has been associated with certain extra-digestive dermatological conditions. The causal relationship between alopecia areata and H. pylori infection has been discussed in literature. Therefore, we conducted this study to evaluate the prevalence of H...
April 2017: Middle East Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28595647/pubertal-development-in-girls-by-breast-cancer-family-history-the-legacy-girls-cohort
#6
Mary Beth Terry, Theresa H M Keegan, Lauren C Houghton, Mandy Goldberg, Irene L Andrulis, Mary B Daly, Saundra S Buys, Ying Wei, Alice S Whittemore, Angeline Protacio, Angela R Bradbury, Wendy K Chung, Julia A Knight, Esther M John
BACKGROUND: Pubertal milestones, such as onset of breast development and menstruation, play an important role in breast cancer etiology. It is unclear if these milestones are different in girls with a first- or second-degree breast cancer family history (BCFH). METHODS: In the LEGACY Girls Study (n = 1040), we examined whether three mother/guardian-reported pubertal milestones (having reached Tanner Stage 2 or higher (T2+) for breast and pubic hair development, and having started menstruation) differed by BCFH...
June 8, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28593717/genetic-architecture-of-acne-vulgaris
#7
REVIEW
Ramtin Lichtenberger, Michael A Simpson, Catherine Smith, Jonathan Barker, Alexander A Navarini
BACKGROUND: Acne vulgaris is a ubiquitary skin disease characterized by chronic inflammation of the pilosebaceous unit resulting from bacterial colonization of hair follicles by Propionibacterium acnes, androgen-induced increased sebum production, altered keratinization and inflammation. OBJECTIVE: Here we review our current understanding of the genetic architecture of this intriguing disease and want to show rare and corresponding diseases like PCOS with acne vulgaris...
June 7, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28492036/updates-in-the-understanding-and-treatments-of-skin-hair-disorders-in-women-of-color
#8
REVIEW
Christina N Lawson, Jasmine Hollinger, Sumit Sethi, Ife Rodney, Rashmi Sarkar, Ncoza Dlova, Valerie D Callender
Skin of color comprises a diverse and expanding population of individuals. In particular, women of color represent an increasing subset of patients who frequently seek dermatologic care. Acne, melasma, and alopecia are among the most common skin disorders seen in this patient population. Understanding the differences in the basic science of skin and hair is imperative in addressing their unique needs. Despite the paucity of conclusive data on racial and ethnic differences in skin of color, certain biologic differences do exist, which affect the disease presentations of several cutaneous disorders in pigmented skin...
March 2017: International Journal of Women's Dermatology
https://www.readbyqxmd.com/read/28370528/the-biology-and-genetics-of-curly-hair
#9
REVIEW
Gillian E Westgate, Rebecca S Ginger, Martin R Green
Hair fibers show wide diversity across and within all human populations suggesting that hair fiber form and colour has been subject to much adaptive pressure over thousands of years. All human hair fibers typically have the same basic structure. However, the three dimensional shape of the entire fiber varies considerably depending on ethnicity and geography, with examples from very straight hair with no rotational turn about the long axis, to the tightly sprung coils of African races. The creation of the highly complex biomaterials in hair follicle and how these confer mechanical functions on the fibre so formed is a topic that remains relatively unexplained thus far...
March 31, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28358737/delay-in-sexual-maturation-in-perinatally-hiv-infected-youths-is-mediated-by-poor-growth
#10
Andrea Bellavia, Paige L Williams, Linda A DiMeglio, Rohan Hazra, Mark J Abzug, Kunjal Patel, Denise L Jacobson, Russell B Van Dyke, Mitchell E Geffner
OBJECTIVE: To evaluate the association between HIV infection and sexual maturation, and mediation of this association by HIV effects on growth. DESIGN: Pooled data were analyzed from two longitudinal cohort studies, the International Maternal Pediatric Adolescent AIDS Clinical Trials P219/219C Study (1993-2007) and the Pediatric HIV/AIDS Cohort Study Adolescent Master Protocol (2007-2015), including perinatally HIV-infected (PHIV) and HIV-exposed uninfected (PHEU) youths...
June 1, 2017: AIDS
https://www.readbyqxmd.com/read/28276806/psychobiological-impact-of-ethnic-discrimination-in-turkish-immigrants-living-in-germany
#11
Susanne Fischer, Urs M Nater, Jana Strahler, Nadine Skoluda, Leander Dieterich, Orgun Oezcan, Ricarda Mewes
Perceived ethnic discrimination has a negative impact on health. One of the key mechanisms may be a dysregulation of stress-responsive systems. Our aims were to investigate whether (1) acute face-to-face ethnic discrimination induces a stress response, and (2) to compare long-term endocrine functioning between immigrants and nonimmigrants. 30 male Turkish immigrants living in Germany underwent an ethnic discrimination condition and a control condition in the laboratory. Perceived ethnic discrimination, stress, salivary alpha-amylase and cortisol were measured four times...
March 5, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28196110/ethnic-variation-in-medical-and-lifestyle-risk-factors-for-b-cell-non-hodgkin-lymphoma-a-case-control-study-among-israelis-and-palestinians
#12
Geffen Kleinstern, Rania Abu Seir, Riki Perlman, Areej Khatib, Ziad Abdeen, Husein Elyan, Ronit Nirel, Gail Amir, Asad Ramlawi, Fouad Sabatin, Paolo Boffetta, Eldad J Dann, Meirav Kedmi, Martin Ellis, Arnon Nagler, Dina Ben Yehuda, Ora Paltiel
BACKGROUND: Risk factors for B-cell non-Hodgkin lymphoma (B-NHL) have not been assessed among Palestinian Arabs (PA) and Israeli Jews (IJ). METHODS: In a case-control study we investigated self-reported medical and lifestyle exposures, reporting odds ratios (ORs) and 95% confidence intervals [CIs], by ethnicity, for overall B-NHL and subtypes. RESULTS: We recruited 823 cases and 808 healthy controls. Among 307 PA/516 IJ B-NHL cases (mean age at diagnosis = 51 [±17] versus 60 [±15] years, respectively) subtype distributions differed, with diffuse large B-cell lymphoma (DLBCL) being prominent among PA (71%) compared to IJ (41%); follicular lymphoma (FL), was observed in 14% versus 28%, and marginal zone lymphoma, in 2% versus 14%, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28145909/novel-tbx3-mutation-in-a-family-of-cypriot-ancestry-with-ulnar-mammary-syndrome
#13
George A Tanteles, Nayia Nicolaou, Andreas Syrimis, Rafaella Metaxa, Michael Nicolaou, Violetta Christophidou-Anastasiadou, Nicos Skordis
Ulnar-mammary syndrome (UMS) is an autosomal dominant disorder resulting from TBX3 haploinsufficiency. It typically affects limb, apocrine gland, hair, tooth and genital development and shows marked intrafamilial and interfamilial variability in phenotypic expression. We report a family (twin brothers and their father) affected with UMS because of a novel TBX3 mutation. The twin brothers showed classical features of UMS, whereas their father was mildly affected. The c.1423C>T (p.Q475*) nonsense mutation in exon 6 of the TBX3 gene identified in the patients by targeted Sanger sequencing is predicted to lead to premature termination of translation...
April 2017: Clinical Dysmorphology
https://www.readbyqxmd.com/read/28138188/skin-of-colour-characteristics-and-disease
#14
Zohra Zaidi
Skin colour varies from pale white to very dark. Fitzpatrick's skin phototypes are based on the person's skin colour and its response to sun exposure in terms of burning and tanning of the skin. Fitzpatrick's type 1V-V1 is known as the skin of colour and type 1-111 is the fair or white skin. The colour of the skin and texture of the hair are the most apparent phenotype to differentiate the different races; this correlates closely with the geography and ultraviolet radiation of the sun. There are notable differences in skin disease incidence, presentation, and treatment based on skin type...
February 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28120203/hair-from-different-ethnic-groups-vary-in-elemental-composition-and-nitrogen-and-phosphorus-mineralisation-in-soil
#15
N M Malepfane, P Muchaonyerwa
Disposal of hair wastes at landfills causes nitrate leaching to ground water, and use of the waste as fertiliser could be a viable option. This study was to determine elemental composition of major hair types in South Africa and their nitrogen (N) and phosphorus (P) release in soil. Wastes of African, White and Indian hair were obtained from local salons and analysed for carbon (C), N and sulphur (S) with the Leco CNS analyzer, and P, bases, aluminium (Al) and micronutrients, with the ICP. We also conducted an incubation study to determine changes in mineral N and P in soil...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28050886/evaluation-of-cortisol-and-telomere-length-measurements-in-ethnically-diverse-women-with-breast-cancer-using-culturally-sensitive-methods
#16
Julio Ramirez, May Elmofty, Esperanza Castillo, Mindy DeRouen, Salma Shariff-Marco, Laura Allen, Scarlett Lin Gomez, Anna María Nápoles, Leticia Márquez-Magaña
The under-representation of ethnic minority participants, who are more likely to be socially disadvantaged in biomedical research, limits generalizability of results and reductions in health disparities. To facilitate investigations of how social disadvantage "gets under the skin," this pilot study evaluated low-intensity methods for collecting hair and saliva samples from multiethnic breast cancer survivors (N = 70) and analysis of biomarkers of chronic stress (cortisol levels) and biological age (telomere length)...
April 2017: Journal of Community Genetics
https://www.readbyqxmd.com/read/28009336/hypocortisolism-and-preterm-birth
#17
S D Karakash, N Tschankoshvili, J Weedon, R M Schwartz, C Kirschbaum, H Minkoff
OBJECTIVE: We sought to determine whether hypocortisolism is associated with preterm birth, using hair cortisol as a marker of long term hypothalamic-pituitary-adrenal axis activity. STUDY DESIGN: In a prospective, matched, case-control study, 29 women who had a preterm birth at 24-36w5d gestation were compared to 29 women who delivered at term, matched for maternal age, gestational age, and ethnicity. Cases' samples were collected within 72 h of preterm birth and controls at the same gestational age as the corresponding case...
2016: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/27999687/a-novel-nonsense-mutation-of-pou4f3-gene-causes-autosomal-dominant-hearing-loss
#18
Chi Zhang, Mingming Wang, Yun Xiao, Fengguo Zhang, Yicui Zhou, Jianfeng Li, Qingyin Zheng, Xiaohui Bai, Haibo Wang
POU4F3 gene encodes a transcription factor which plays an essential role in the maturation and maintenance of hair cells in cochlea and vestibular system. Several mutations of POU4F3 have been reported to cause autosomal dominant nonsyndromic hearing loss in recent years. In this study, we describe a pathogenic nonsense mutation located in POU4F3 in a four-generation Chinese family. Target region capture sequencing was performed to search for the candidate mutations from 81 genes related to nonsyndromic hearing loss in this family...
2016: Neural Plasticity
https://www.readbyqxmd.com/read/27923182/sociodemographic-lifestyle-and-psychosocial-determinants-of-hair-cortisol-in-a-south-london-community-sample
#19
Susanne Fischer, Roman Duncko, Stephani L Hatch, Andrew Papadopoulos, Laura Goodwin, Souci Frissa, Matthew Hotopf, Anthony J Cleare
OBJECTIVE: Hypothalamic-pituitary-adrenal (HPA) measures are crucial for research into stress and stress-related disorders. Most HPA measures fluctuate depending on diurnal rhythms and state confounders. Hair cortisol concentrations (HCC) are less susceptible to such fluctuations, but less is known about trait-like confounders. Using a community sample, we tested the relationship between HCC and a range of variables including demographic variables, hair treatment, and medication, as well as psychosocial variables, namely childhood trauma, critical life events, and depressive symptoms...
February 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27918001/evolution-of-skin-and-hair-in-african-americans
#20
REVIEW
Angela Kyei, Sara Hogan
Current demographic trends in the United States highlight the growing population of those who identify as having "skin of color." As such, dermatologists must have a greater comfort level and knowledge in treating some of the unique skin and hair conditions seen in this population. Understanding the scientific basis for the evolution of skin color and hair texture is necessary in order to understand the variations in the characteristics of skin and hair seen among racial and ethnic groups. This review seeks to highlight the current scientific explanation of skin color and hair texture, with special attention to people of African descent, in an attempt to give insight into the clinical presentations of hair and skin disorders seen in this group...
December 2016: Seminars in Cutaneous Medicine and Surgery
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