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61. Can concentrations of steroid hormones in brown bear hair reveal age class? (PubMed)

Can concentrations of steroid hormones in brown bear hair reveal age class? Although combining genetic and endocrine data from non-invasively collected hair samples has potential to improve the conservation of threatened mammals, few studies have evaluated this opportunity. In this study, we determined if steroid hormone (testosterone, progesterone, estradiol and cortisol) concentration profiles in 169 hair samples collected from free-ranging brown bears (Ursus arctos) could be used (...) to accurately discriminate between immature and adult bears within each sex. Because hair samples were acquired opportunistically, we also needed to establish if interactions between hormones and several non-hormone factors (ordinal day, year, contact method, study area) were associated with age class. For each sex, we first compared a suite of candidate models by Akaike Information Criteria model selection, using different adult-age thresholds (3, 4 and 5 years), to determine the most supported adult age

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2018 Conservation physiology

62. Trichobezoar: Ravenous for Hair (PubMed)

Trichobezoar: Ravenous for Hair Trichophagia is the habit of chewing hair. On an average, only 1% patients with trichophagia develop trichobezoar. They are usually symptomless until they reach a large size. It is common in young females usually with an underlying psychiatric disorder. The gold standard for diagnosis is upper gastrointestinal endoscopy (UGIE). Here we present a case of trichobezoar in an 11-year-old girl who presented in the emergency with complaint of pain abdomen and symptoms (...) of obstruction.A high index of suspicion among physician can lead to early diagnosis and management in these cases (trichobezoar).How to cite this article: Prasad A, Jain A, Gupta A, Kamra A. Trichobezoar: Ravenous for Hair. Euroasian J Hepato-Gastroenterol 2018;8(1):97-98.

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2018 Euroasian journal of hepato-gastroenterology

63. Hair histology as a tool for forensic identification of some domestic animal species (PubMed)

Hair histology as a tool for forensic identification of some domestic animal species Animal hair examination at a criminal scene may provide valuable information in forensic investigations. However, local reference databases for animal hair identification are rare. In the present study, we provide differential histological analysis of hair of some domestic animals in Upper Egypt. For this purpose, guard hair of large ruminants (buffalo, camel and cow), small ruminants (sheep and goat), equine (...) (horse and donkey) and canine (dog and cat) were collected and comparative analysis was performed by light microscopy. Based on the hair cuticle scale pattern, type and diameter of the medulla, and the pigmentation, characteristic differential features of each animal species were identified. The cuticle scale pattern was imbricate in all tested animals except in donkey, in which coronal scales were identified. The cuticle scale margin type, shape and the distance in between were characteristic

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2018 EXCLI journal

64. The effects of body region, season and external arsenic application on hair cortisol concentration (PubMed)

The effects of body region, season and external arsenic application on hair cortisol concentration Hair cortisol analysis has been used to quantify hormone levels in circulation in several mammal species. Hair remains stable for decades or centuries, allowing researchers to use archived hair samples to investigate hormone levels that span long time periods. However, several studies have found that intra-individual variability, driven by the body region from which a sample is derived, confounds (...) measurements of systemic glucocorticoid hormone concentrations. In addition, the external application of chemical agents to hair can remove or concentrate molecules of interest. These may preclude the use of samples that have been collected opportunistically and/or those that have been housed in museum collections. Using a captive population of Vancouver Island marmots (Marmota vancouverensis), we found a strong effect of body region on the concentration of cortisol within hair, as well as an effect

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2018 Conservation physiology

65. Metallic hair pin aspiration into the left tertiary bronchus (PubMed)

Metallic hair pin aspiration into the left tertiary bronchus Foreign body aspiration is commonly described in infants and children. However, recently, a new high-risk group was identified among young women, especially those from the Muslim population who wear the traditional hair scarf. This is due to the habit of holding the scarf pin in between the lips to free hands to adjust the scarf more easily. Talking, laughing, or coughing while fixing the scarf may result in inadvertent inhalation

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2018 Malaysian family physician : the official journal of the Academy of Family Physicians of Malaysia

66. Perceived stress and reference ranges of hair cortisol in healthy adolescents. (PubMed)

Perceived stress and reference ranges of hair cortisol in healthy adolescents. Chronic stress during adolescence has usually been evaluated through subjective measures, leaving aside objective measures such as hair cortisol concentrations. Therefore, the aim of this study was to provide reference ranges for hair cortisol concentrations by sex and age and to study the relationship between subjective and objective measures of stress and temporal stability.The participants were 170 adolescents (...) aged between 12 and 14 years (mean = 12.78 years; standard deviation = 0.71 years; 52.40% girls) who completed the Perceived Stress Scale 4 and had their hair sampled.The results revealed hair cortisol concentrations ranging from 0.07 pg/mg to 9.54 pg/mg. Subjective and objective measures of stress were not related, nor was there intraindividual stability of the hair cortisol concentrations. Girls had higher hair cortisol concentrations, and there were no age differences.This research provides

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2019 PLoS ONE

67. Microbiome in the hair follicle of androgenetic alopecia patients. (PubMed)

Microbiome in the hair follicle of androgenetic alopecia patients. Androgenetic alopecia is the most common form of hair loss in males. It is a multifactorial condition involving genetic predisposition and hormonal changes. The role of microflora during hair loss remains to be understood. We therefore analyzed the microbiome of hair follicles from hair loss patients and the healthy. Hair follicles were extracted from occipital and vertex region of hair loss patients and healthy volunteers (...) and further dissected into middle and lower compartments. The microbiome was then characterized by 16S rRNA sequencing. Distinct microbial population were found in the middle and lower compartment of hair follicles. Middle hair compartment was predominated by Burkholderia spp. and less diverse; while higher bacterial diversity was observed in the lower hair portion. Occipital and vertex hair follicles did not show significant differences. In hair loss patients, miniaturized vertex hair houses elevated

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2019 PLoS ONE

68. Dental derived stem cell conditioned media for hair growth stimulation. (PubMed)

Dental derived stem cell conditioned media for hair growth stimulation. Alopecia is a clinical condition caused by excessive hair loss which may result in baldness, the causes of which still remain elusive. Conditioned media (CM) from stem cells shows promise in regenerative medicine. Our aim was to evaluate the potential CM of dental pulp stem cells obtained from human deciduous teeth (SHED-CM) to stimulate hair growth under in vitro and in vivo conditions. SHED and hair follicle stem cells (...) (HFSCs) (n = 3) were cultured in media combinations; i) STK2, ii) DMEM-KO+10% FBS, iii) STK2+2% FBS and profiled for the presence of positive hair growth-regulatory paracrine factors; SDF-1, HGF, VEGF-A, PDGF-BB and negative hair growth-regulatory paracrine factors; IL-1α, IL-1β, TGF-β, bFGF, TNF-α, and BDNF. The potential of CM from both cell sources to stimulate hair growth was evaluated based on the paracrine profile and measured dynamics of hair growth under in vitro conditions

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2019 PLoS ONE

69. Association between hair cortisol concentration and dietary intake among normal weight preschool children predisposed to overweight and obesity. (PubMed)

Association between hair cortisol concentration and dietary intake among normal weight preschool children predisposed to overweight and obesity. The association between chronically elevated cortisol, as measured by hair cortisol concentration (HCC), and dietary intake among children has generally not been explored. Moreover, it is unknown whether there is an association between parental HCC and dietary intake among their children.To examine associations between HCC and dietary intake among

2019 PLoS ONE

70. Human exposure to uranium in South African gold mining areas using barber-based hair sampling. (PubMed)

Human exposure to uranium in South African gold mining areas using barber-based hair sampling. Uranium (U) measurements in water, soil, and food related to gold mining activities in populated areas in Gauteng Province, South Africa, suggest the possibility of exposure levels that may lead to adverse health consequences, including cancer. Theoretical considerations on pathways of human uptake of significant exposures are plausible, but few data on directly measured human exposure are available (...) . A cross-sectional study was conducted using human measurements to compare U levels with other settings around the globe (based on literature review), to explore potential exposure variability within the province, and to test the feasibility of recruiting subjects partially coming from vulnerable and difficult-to-reach populations. Wards of potentially high (HE) and low exposure (LE) were identified. Composite hair samples representing the respective local populations were collected from regular

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2019 PLoS ONE

71. Scalp hair cortisol and testosterone levels in patients with sarcoidosis. (PubMed)

Scalp hair cortisol and testosterone levels in patients with sarcoidosis. Patients with sarcoidosis often experience fatigue and psychological distress, but little is known about the etiology of these conditions. While serum and saliva steroid hormones are used to monitor acute steroid levels, scalp hair analysis is a relatively new method enabling measurement of long-term steroid levels, including hair cortisol reflecting chronic stress. We investigated whether scalp hair cortisol (...) and testosterone levels differ between sarcoidosis patients both with and without fatigue and general population controls. Additionally, we studied if these hormones could serve as objective biomarkers for psychological distress in patients with sarcoidosis.We measured hair steroid levels using liquid chromatography-tandem mass spectrometry in glucocorticoid naïve sarcoidosis patients. Patients completed the Perceived Stress Scale, Fatigue Assessment Scale, Hospital Anxiety and Depression Scale and Short Form

2019 PLoS ONE

72. What Ages Hair? (PubMed)

What Ages Hair? 28492040 2018 11 13 2352-6475 3 1 Suppl 2017 Mar International journal of women's dermatology Int J Womens Dermatol What Ages Hair? S52-S57 10.1016/j.ijwd.2017.02.010 Monselise Assaf A Department of Dermatology and Skin Science, University of British Columbia, BC, Canada. Private practice, Tel Aviv, Israel. Cohen David E DE The Ronald O. Perelman Department of Dermatology, New York University School of Medicine, NY, USA. Wanser Rita R Cicatricial Alopecia Research Foundation

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2017 International journal of women's dermatology

73. Updates in the understanding and treatments of skin & hair disorders in women of color (PubMed)

Updates in the understanding and treatments of skin & hair disorders in women of color 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 (...) with darker skin types and is strongly associated with ultraviolet (UV) radiation, genetic factors, and hormonal influences. Lastly, certain hair care practices and hairstyles are unique among women of African descent, which may contribute to specific types of hair loss seen in this population, such as traction alopecia, trichorrhexis nodosa and central centrifugal cicatricial alopecia (CCCA).

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2017 International journal of women's dermatology

74. Hair camouflage: A comprehensive review (PubMed)

Hair camouflage: A comprehensive review Hair is venerated, cherished, and desired in societies throughout the world. Both women and men express their individual identities through their hairstyles. Healthy hair contributes to successful social assimilation, employment, and overall quality of life. Therefore, hair loss can have detrimental effects on almost every aspect of a person's life. In this review, we discuss the myriad of options that aid in concealing and camouflaging hair loss (...) to facilitate a healthier-appearing scalp. Camouflage options for patients who suffer from hair loss include full or partial wigs, hair extensions, concealing powders and sprays, surgical tattoos, and hair transplants. We describe these modalities in detail and discuss their respective advantages and disadvantages.

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2017 International journal of women's dermatology

75. Hormonal therapy in female pattern hair loss (PubMed)

Hormonal therapy in female pattern hair loss 28492055 2018 11 13 2352-6475 3 1 2017 Mar International journal of women's dermatology Int J Womens Dermatol Hormonal therapy in female pattern hair loss. 53-57 10.1016/j.ijwd.2017.01.001 Brough Kevin R KR Department of Dermatology Mayo Clinic, Rochester, MN. Torgerson Rochelle R RR Department of Dermatology Mayo Clinic, Rochester, MN. eng Journal Article Review 2017 02 24 Netherlands Int J Womens Dermatol 101654170 2352-6475 Female pattern hair (...) loss is the most common cause of hair loss in women and one of the most common problems seen by dermatologists. This hair loss is a nonscarring alopecia in which loss occurs on the vertex scalp, generally sparing the frontal hairline. Hair loss can have significant psychosocial effects on patients, and treatment can be long and difficult. The influence of hormones on the pathogenesis of female pattern hair loss is not entirely known. The purpose of this paper is to review physiology and potential

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2017 International journal of women's dermatology

76. Hair cortisol and lifetime discrimination: Moderation by subjective social status (PubMed)

Hair cortisol and lifetime discrimination: Moderation by subjective social status Discrimination has been associated with elevated cortisol as measured in saliva, blood, and urine. This study investigated the association between lifetime discrimination and hair cortisol concentrations, considered a measure of chronic stress. We recruited 180 young adults from diverse backgrounds. Participant responses to lifetime discrimination, home stress, and subjective status measures were recorded (...) . Lifetime discrimination significantly predicted hair cortisol concentrations, supporting past research that discrimination experiences impact neuroendocrine systems. To our knowledge, these are the first findings associating hair cortisol concentrations with discrimination and supports prior evidence positing discrimination as a chronic stressor that serves as a risk factor for chronic disease.

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2017 Health psychology open

77. Compatibility of preparatory procedures for the analysis of cortisol concentrations and stable isotope (δ13C, δ15N) ratios: a test on brown bear hair (PubMed)

Compatibility of preparatory procedures for the analysis of cortisol concentrations and stable isotope (δ13C, δ15N) ratios: a test on brown bear hair The measurement of naturally occurring glucocorticoids and stable isotopes of several elements has gained importance in wildlife studies in recent decades and opened a myriad of ecological applications. Cortisol and stable isotopes equilibrate in animal tissues over periods of integration related to the growth rate of the tissue, providing (...) concentrations and stable carbon (δ13C) and nitrogen (δ15N) isotope ratios in hair. Hair samples from 12 brown bears (Ursus arctos) were each divided into five aliquots; two aliquots were rinsed with a 2:1 chloroform:methanol (v/v) mixture with one aliquot ground prior to cortisol analysis and the other left intact for stable isotope analyses; two aliquots were washed with methanol with one aliquot ground prior to cortisol analysis and the other left intact for stable isotope analyses; and one aliquot washed

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2017 Conservation physiology

78. The quantification of reproductive hormones in the hair of captive adult brown bears and their application as indicators of sex and reproductive state (PubMed)

The quantification of reproductive hormones in the hair of captive adult brown bears and their application as indicators of sex and reproductive state Recognizing the potential value of steroid hormone measurements to augment non-invasive genetic sampling, we developed procedures based on enzyme-linked immunoassays to quantify reproductive steroid hormone concentrations in brown bear (Ursus arctos) hair. Then, using 94 hair samples collected from eight captive adult bears over a 2-year period (...) , we evaluated (i) associations between hair concentrations of testosterone, progesterone, estradiol and cortisol; (ii) the effect of collecting by shaving vs. plucking; and (iii) the utility of reproductive hormone profiles to differentiate sex and reproductive state. Sample requirements (125 mg of guard hair) to assay all hormones exceeded amounts typically obtained by non-invasive sampling. Thus, broad application of this approach will require modification of non-invasive techniques to collect

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2017 Conservation physiology

79. Assessment of usefulness of synchrotron radiation techniques to determine arsenic species in hair and rice grain samples (PubMed)

Assessment of usefulness of synchrotron radiation techniques to determine arsenic species in hair and rice grain samples The arseniasis in Southwest Guizhou, China has been identified as a unique case of endemic arseniasis caused by exposure to indoor combustion of high As-content coal. Present investigation targeted the microdistribution and speciation of the element arsenic in human hair and environmental samples collected in one of the hyper-endemic villages of arseniasis in the area (...) . Analyses were performed by micro-beam X-ray fluorescence (μ-XRF) and X-ray absorption fine structure (XAFS). The total As level in hair samples of diagnosed patients was detected at almost the same level as in their asymptomatic neighbors. Concentrations in the lateral cut of hair samples were high-low-high (from surface to center). XAFS revealed the coexistence of both the As+3 and As+5 states in hair samples. However, the samples from patients displayed a tendency of higher As+3 / As+5 ratio than

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2017 EXCLI journal

80. Premature graying of hair: risk factors, co-morbid conditions, pharmacotherapeutic management options and reversal. A systematic review

Premature graying of hair: risk factors, co-morbid conditions, pharmacotherapeutic management options and reversal. A systematic review Print | PDF PROSPERO This information has been provided by the named contact for this review. CRD has accepted this information in good faith and registered the review in PROSPERO. The registrant confirms that the information supplied for this submission is accurate and complete. CRD bears no responsibility or liability for the content of this registration

2019 PROSPERO

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