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https://www.readbyqxmd.com/read/29666910/ontogeny-and-development-of-the-tritocerebral-commissure-giant-tcg-an-identified-neuron-in-the-brain-of-the-grasshopper-schistocerca-gregaria
#1
George Stephen Boyan, Leslie Williams, Tobias Müller, Jonathan P Bacon
The tritocerebral commissure giant (TCG) of the grasshopper Schistocerca gregaria is one of the best anatomically and physiologically described arthropod brain neurons. A member of the so-called Ventral Giant cluster of cells, it integrates sensory information from visual, antennal and hair receptors, and synapses with thoracic motor neurons in order to initiate and regulate flight behavior. Its ontogeny, however, remains unclear. In this study, we use bromodeoxyuridine incorporation and cyclin labeling to reveal proliferative neuroblasts in the region of the embryonic brain where the ventral giant cluster is located...
April 17, 2018: Development Genes and Evolution
https://www.readbyqxmd.com/read/29658875/new-aspects-of-the-structure-of-human-scalp-hair-ii-tubular-structure-and-material-flow-property-of-the-medulla
#2
Asao Yamauchi, Kiyoshi Yamauchi
Asian scalp hair fibers were made thin by treatment with papain or sliced along the longitudinal axis or randomly cut by mechanical means. Optical microscopic observations of the resulting specimens indicated that (i) the medulla (M) consisted of two types of the M-surrounding cells which were linearly linked one another to form a tubular structure running through the fiber and (ii) the drum-shaped vesicles containing small proteinous granules were neatly or sparsely stored within the tube. On the other hand, H+ and OH- ions were able to move spontaneously from one end to another through the M tube...
January 2018: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/29643913/hair-dye-poisoning-an-early-intervention
#3
Syed Farrukh Umair, Imrana Amin, Ata Urrehman
The use of hair dye has been emerging worldwide however usage of Paraphenylenediamine (PPD) in making hair dye is generally restricted to underdeveloped and developing countries. In particular, prevalence of accidental and suicidal ingestion is more in low socioeconomic areas. The spectra of hair dye toxicity is wide, however, it presents more commonly with severe angioedema of face and neck leading to respiratory failure, rhabdomyolysis complicating into acute kidney injury, myocarditis and acute liver injury...
January 2018: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29607000/basaloid-follicular-hamartoma-a-case-report-and-a-novel-cosmetic-treatment
#4
Kelly Segars, Hassie Cooper, Daniel J Hogan, Richard Miller, Michael Heaphy, James Spencer
Introduction: Basaloid follicular hamartoma (BFH) is a rare, benign neoplasm of the hair follicle, characterized by multiple brown papules involving the face, scalp, and trunk. It is described by multiple clinical forms, and can present as localized or generalized. Diagnosis is made histologically via biopsy, which is important in order to distinguish BFH from basal cell carcinoma (BCC) or other malignant epithelial neoplasms. Correct diagnosis allows for the avoidance of unnecessary surgeries to remove benign lesions...
March 2018: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/29601618/the-use-of-a-self-occluding-topical-anasthetic-in-daily-practice-a-non-interventional-study
#5
Ravi Jain, Gerardo Moreno Arias, Pablo Naranjo, Max Murison, Jose Luis López Estebaranz, Alina Fratila, Welf Prager, Carlos Guillén Barona, Michael Weidmann, Serge Dahan, Hugues Cartier, Gerhard Sattler, Maurizio Podda
INTRODUCTION: A variety of topical anesthetic creams are available to reduce pain associated with dermatological procedures. Pliaglis is a self-occluding eutectic mixture of lidocaine and tetracaine. STUDY OBJECTIVES: To evaluate the post-marketing safety profile of Pliaglis and efficacy in terms of pain reduction, product satisfaction, and daily practice use prior to pre-defined dermatological procedures. METHODS: A prospective, non-interventional study conducted at 44 sites in four European countries; 581 patients were treated prior to dermatological procedures such as pulsed-dye laser therapy, laser-assisted hair removal, non-ablative laser resurfacing, dermal filler injections, and vascular access...
April 1, 2018: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29596886/environmental-and-occupational-exposure-to-resorcinol-in-finland
#6
Simo P Porras, Minna Hartonen, Katriina Ylinen, Jarkko Tornaeus, Tapani Tuomi, Tiina Santonen
Resorcinol is a suspected endocrine disruptor that affects thyroid function by inhibiting thyroxin peroxidase. It may also have an impact on iodine uptake. Resorcinol has various uses; for example in the manufacture of rubber products and in wood adhesives, flame retardants, UV stabilizers, and dyes. It is also used in personal care products such as hair colorants, anti-acne preparations, and peels. The aim of this study was to assess both environmental background exposure and occupational exposure to resorcinol in Finland...
March 26, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29574979/allergic-contact-dermatitis-caused-by-1-naphthol-a-red-coupler-in-a-purple-permanent-oxidative-hair-dye
#7
Thomas King, Ruth Sabroe, Catherine Holden
No abstract text is available yet for this article.
March 25, 2018: Contact Dermatitis
https://www.readbyqxmd.com/read/29556436/an-alkaline-bacterial-laccase-for-polymerization-of-natural-precursors-for-hair-dye-synthesis
#8
Deepak Kumar, Aditya Kumar, Sonica Sondhi, Prince Sharma, Naveen Gupta
In the present study, an extracellular alkali stable laccase (Lac DS) from Bacillus subtilis DS which has pH optima at 8.5 using p -phenylenediamine (PPD) as substrate has been reported. Lac DS retained 70% activity for 4 h at pH 8.5 and 90% activity for 24 h at 55 °C. The enzyme yield was enhanced by optimization of fermentation conditions. A 746-fold increase in yield was observed under optimized conditions using 150 µM MgSO4 , 1.2% yeast extract, 0.35% tryptone, and 150 µM vanillic acid. Lac DS was used to polymerize natural dye precursor catechol, pyrogallol, syringaldehyde, syringic acid, ferulic acid and gallic acid to develop a range of natural hair colors such as black, golden yellow, and reddish brown...
March 2018: 3 Biotech
https://www.readbyqxmd.com/read/29530615/skin-sensitization-quantitative-risk-assessment-for-occupational-exposure-of-hairdressers-to-hair-dye-ingredients
#9
Carsten Goebel, Thomas L Diepgen, Brunhilde Blömeke, Anthony A Gaspari, Axel Schnuch, Anne Fuchs, Kordula Schlotmann, Maya Krasteva, Ian Kimber
Occupational exposure of hairdressers to hair dyes has been associated with the development of allergic contact dermatitis (ACD) involving the hands. p-Phenylenediamine (PPD) and toluene-2,5-diamine (PTD) have been implicated as important occupational contact allergens. To conduct a quantitative risk assessment for the induction of contact sensitization to hair dyes in hairdressers, available data from hand rinsing studies following typical occupational exposure conditions to PPD, PTD and resorcinol were assessed...
March 9, 2018: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29496197/allergic-contact-dermatitis-due-to-paraphenylenediamine-an-update
#10
B Encabo Durán, D Romero-Pérez, J F Silvestre Salvador
Paraphenylenediamine (PPD) is an amine that is mainly used as an ingredient in hair dyes and henna tattoos. The incidence of allergic contact dermatitis to PPD is increasing, particularly in younger patients. In this article, we review the main sources of PPD and the substances with which it can interact and present a practical algorithm for diagnosing and treating suspected cases of PPD allergy.
February 26, 2018: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/29482183/maternal-use-of-personal-care-products-during-pregnancy-and-risk-of-testicular-germ-cell-tumors-in-sons
#11
Armen A Ghazarian, Britton Trabert, Kim Robien, Barry I Graubard, Katherine A McGlynn
BACKGROUND: The etiology of testicular germ cell tumors (TGCT) is poorly understood, however, exposure to endocrine disrupting chemicals (EDCs) may be related to increased risk. Personal care products, some of which contain EDCs, are widely used on a daily basis and are known to cross the placenta, be present in breastmilk, and are capable of inducing reproductive tract abnormalities. To determine the association between personal care product use during pregnancy and breastfeeding and TGCT risk, an analysis among mothers of TGCT cases and controls was conducted...
February 23, 2018: Environmental Research
https://www.readbyqxmd.com/read/29478066/acute-kidney-injury-in-sub-sahara-africa-a-single-center-experience-from-khartoum-sudan
#12
Dalia E Yousif, Alice R Topping, Maha F Osman, Jochen G Raimann, Elfadil M Osman, Peter Kotanko, Omar I Abboud
BACKGROUND: The burden of acute kidney injury (AKI) is high in Africa. While there are no reliable statistics about AKI in Africa, the Global Snapshot Study of the 0by25 initiative of the International Society of Nephrology has determined dehydration, infections, animal envenomation, and complications during pregnancy as the main causes. METHODS: This study was conducted at the Soba University Hospital (SUH), Khartoum, Sudan, a tertiary referral center. We included all hemodialysis patients treated for AKI at SUH between -January 1, 2013 and December 31, 2014 in the study...
January 26, 2018: Blood Purification
https://www.readbyqxmd.com/read/29436177/graphene-doped-electrochemical-copolymer-coating-of-2-2-bithiophene-and-3-methylthiophene-for-the-highly-effective-solid-phase-microextraction-of-volatile-benzene-homologues
#13
Xiafei Guo, Faqiong Zhao, Baizhao Zeng
We report the electrochemical fabrication of a poly(2,2-bithiophene-co-3-methylthiophene)-graphene composite coating and its application in the headspace solid-phase microextraction and gas chromatography determination of benzenes (i.e., bromobenzene, 4-bromotoluene, 2-nitrotoluene, 3-nitrotoluene, 1,2,4-trichlorobenzene). The coating was uniform and showed cauliflower-like microstructure. It had high thermal stability (up to 375°C) and could be used for at least 180 times of solid-phase microextraction without a decrease of extraction performance...
February 13, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29408551/dual-dye-in-vivo-imaging-of-differentially-charged-plga-carriers-reveals-antigen-depot-effect-leading-to-improved-immune-responses-in-preclinical-models
#14
Markus Riehl, Meike Harms, Henrike Lucas, Thomas Ebensen, Carlos A Guzmán, Karsten Mäder
The present in-vivo study investigated the behavior and performance of differently charged poly(lactic‑co‑glycolic) acid microparticles (PLGA MP) as vaccination platform. For this purpose, particles loaded with Ovalbumin (OVA) as model antigen were subcutaneously (s.c.) injected in SKH1 mice. The utilized SKH1 hairless mice exhibit a fully operative immune system and allow parallel imaging investigations due to the lack of hair. Usage of this species enabled the combination of two investigations within a single study protocol, namely noninvasive in-vivo imaging and immune responses directed towards the antigen...
February 2, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29403185/standardization-of-smp-procedure-and-its-impact-on-outcome
#15
Rachita S Dhurat, Sujit J S Shanshanwal, Ameet L Dandale
Background: Cosmetic deformities can result from various types of alopecia or even post hair transplantation procedures. Patients with such deformities seek aesthetically appealing longer-lasting options. Scalp concealers are commonly used by men and women to camouflage these deformities. Scalp micropigmentation (SMP) is one of the concealers recently gaining popularity. Objectives: SMP is a novel technique wherein microdot tattoos are placed in a stippling pattern to mimic hair follicles that are cut close to the scalp and various variables affecting its outcome were evaluated...
July 2017: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/29392864/an-efficient-method-for-eccrine-gland-isolation-from-human-scalp
#16
F Jimenez, M Alam, I Hernandez, E Poblet, J A Hardman, R Paus
We describe a simple and efficient method to isolate eccrine sweat glands from the human scalp. This method is inspired by the hair graft harvesting method used in hair transplantation. Based on the recently described anatomical relationship between the scalp hair follicle and the eccrine gland, we have found that scalp follicular unit grafts are an excellent eccrine gland isolation source, especially for the coiled component. In order to make the gland visible for stereoscopic microdissection, the follicular units need to be previously stained with a vital dye like Methylene Blue or Neutral Red...
February 2, 2018: Experimental Dermatology
https://www.readbyqxmd.com/read/29392051/dyspnea-associated-with-henna-stone-a-rare-cause-of-pediatric-tracheotomy
#17
Selis Gülseven Güven
Tracheotomy is one of the oldest surgical procedures, and it is a life-saving procedure to overcome upper airway obstructions. While congenital causes play an important role in pediatric tracheotomy indications, upper airway edema and obstruction due to anaphylaxis rarely require tracheotomy. Allergy can cause life-threatening acute edema by anaphylactic reactions in the respiratory tract. Henna stone is the material for dyeing hair with henna and making a temporary tattoo. It contains high proportions of paraphenylendiamine...
March 2017: Turkish Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/29374694/does-the-use-of-hair-dyes-increase-the-risk-of-developing-breast-cancer-a-meta-analysis-and-review-of-the-literature
#18
Ritika Gera, Ramia Mokbel, Ivanna Igor, Kefah Mokbel
BACKGROUND/AIM: Hair dye may contain mutagenic compounds which could be associated with an increased incidence of breast cancer in women who use it. The aim of this study was to examine the association between the personal use of hair dyes and the risk of breast cancer. MATERIALS AND METHODS: We conducted a literature review of epidemiological studies reporting breast cancer-specific risks among hair dye users versus non-users. The data for the incidence of breast cancer following the 'ever' use of hair dye in studies which met the inclusion criteria was analysed using a meta-analysis...
February 2018: Anticancer Research
https://www.readbyqxmd.com/read/29361043/keratin-hydrolysis-by-dermatophytes
#19
Derry K Mercer, Colin S Stewart
Dermatophytes are the most common cause of superficial fungal infections (tinea infections) and are a specialized group of filamentous fungi capable of infecting and degrading keratinised tissues, including skin, hair, and nail. Essential to their pathogenicity and virulence is the production of a broad spectrum of proteolytic enzymes and other key proteins involved in keratin biodegradation and utilization of its breakdown products. The initial stage of biodegradation of native keratin is considered to be sulfitolysis, in which the extensive disulfide bridges present in keratin are hydrolyzed, although some secreted subtilisins can degrade dye-impregnated keratin azure without prior reduction (Sub3 and Sub4)...
January 17, 2018: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29322532/factors-associated-with-p-phenylenediamine-sensitization-data-from-the-information-network-of-departments-of-dermatology-2008-2013
#20
Steffen Schubert, Holger Lessmann, Axel Schnuch, Wolfgang Uter, Johannes Geier
BACKGROUND: Risk factors for p-phenylenediamine (PPD) sensitization include the use of hair dyes, the application of temporary black henna tattoos, working as a hairdresser, and, possibly, exposure to hair dye pretests. OBJECTIVES: To quantify the impact of these (putative) risk factors on PPD sensitization. METHODS: Six items related to PPD exposure were added to the routine Information Network of Departments of Dermatology questionnaire from 2008 to 2013...
March 2018: Contact Dermatitis
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