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Beak deformities are rare, although they have been documented in different parts of the world, mainly in North America and Europe. I present records of three individuals of Black-crested Titmouse (Baeolophus atricristatus) with beak deformities, registered on 26 May 2018, in the Ranchito de Juárez locality, municipality of Zaragoza, San Luis Potosí, Mexico. The birds were observed when they attended a rustic feeder. The upper mandible of their beaks (maxilla or rhinotheca) had an abnormal prolongation, crossing the lower mandible of the beak. These records are novel and represent the first known cases of avian keratin disorder in the species. [ABSTRACT FROM AUTHOR]

Copyright of Revista Entramado is the property of Universidad Libre Seccional Cali and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In included teeth the remnants of the follicular sac originate from odontogenic cysts such as the dentigerous cyst. This cyst is generated by alteration of the epithelium of the enamel organ after the complete formation of the crown due to the accumulation of liquid between the layers of the adamantine epithelium. Radiographic and histopathological studies are used for the diagnosis of these entities, however, the use of some of the odontogenic immunohistochemistry markers can be a diagnostic aid. The aim of this study was to determine the expression of Cytokeratin 19 protein in biopsies processed during 2018 - 2020 of dentigerous cysts and follicular sacs from the Oral and Maxillofacial Pathology service of the School of Dentistry of the Universidad Nacional de Colombia. A case series study was carried out with 20 blocks with a previous histopathological diagnosis of dentigerous cyst. Hematoxylin and eosin staining was performed and later immunohistochemical labeling with Cytokeratin 19 was performed. The results obtained demonstrate the usefulness of cytokeratin as an immunomarker, particularly for the diagnosis of incipient lesions. [ABSTRACT FROM AUTHOR]

The skin cicatrization is a complex and organized process that involves three phases: inflammatory, proliferative, and remodeling. It is essential to analyze this process biomolecularly, in order to investigate and propose new therapeutic strategies that improve the healing or promote regeneration. The objective of this project was to analyze histological and biomolecularly through Fourier Transform infrared microspectroscopy (FTIRM) and its biochemical mapping function, samples of an excisional skin wound, comparing the morphological and spectroscopic changes between healthy skin and scarred skin. An excisional skin wound healing model was standardized using female, NIH strain 8-week-old mice (n = 16), provoking an excisional wound of 1 cm2. Healthy skin (day 0) and scarring skin (day 15 post-injury) were morphometrical, histological, and biomolecularly analyzed by digital picture analysis, histological technique, and FTIRM with its mapping function. The morphometric analysis showed a reduction of the wound area of 87.6% at day 15 after wound. Histologically, in the scarred skin a thinning of the epidermis was evidenced, besides reduced cellularity in the dermis, granulation tissue formation, and disorganized collagen fibers were observed. Spectroscopically, changes between the study groups were appreciated, mainly in the lipid bands and in the protein region. The calculation of the areas under the curve and the biochemical mapping showed a lower concentration of keratin and collagen in the scarred skin, as well as collagen fibers disorganization. The ability of the FTIRM to accurately characterize biomolecular changes in cicatrization process was demonstrated, such as the amount of keratin, collagen, and the deposition and ordering of the collagen fibers associated with their maturation. [ABSTRACT FROM AUTHOR]

Granular parakeratosis is a benign entity that mainly affects the intertriginous areas and is associated with occlusion and contact with irritants. It was first described in 1991 by Northcutt et al. The usual clinical presentation is the presence of plaques composed of hyperpigmented follicular papules that are erythematous and confluent in axillary folds and less frequently, in inguinal folds and buttocks unilaterally or bilaterally. It mainly affects middle-aged women and have good answer to treatment with steroids and topical retinoids. We present the case report of a 36-year-old woman diagnosed with granular axillary parakeratosis, with complete resolution of tretinoin and topical tracrolimus lesions. [ABSTRACT FROM AUTHOR]

This research evaluated the enzymatic hydrolysis of chicken feathers to obtain hydrolyzed energy as an alternative to valorize this design generated by the poultry industry. The hydrolysis was performed with the enzyme Genencor® Tan G plus, using an experimental design of central compound type, selecting as factors the pH (8 to 9), the temperature (20 ° C to 30 ° C) and the enzyme dose (0.03 g to 0.05 g), and in response to the concentration of the protein in the extract using the Bradford method and SDS-PAGE gel electrophoresis to determine the purity. The results are studied by means of an analysis of the variance and the methodology of the response surface obtaining a pH of 8, an enzyme dose of 0.03 g and a temperature of 25 ° C, a maximum concentration of 2.106 mg / mL being the pH and temperature (° C) The significant factors of hydrolysis. [ABSTRACT FROM AUTHOR]

A case of unilateral axillar granular parakeratosis in a woman is presented. A macular hyperpigmented lesion was the initial clinical presentation and resolved completely. The physiopathology and unusual macular presentation are discussed. The macules could correspond to an initial form or a clinical variant of the disease. The patient received topical keratolytics with resolution of the lesions. [ABSTRACT FROM AUTHOR]

Copyright of Revista de la Sociedad Química del Perú is the property of Sociedad Quimica del Peru and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Universitas Médica is the property of Pontificia Universidad Javeriana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Utilizing fluorescence, we generated excitation-emission matrices, which provided us with a map of fluorophores present in keratin tissues. Our findings suggest that all of the tested keratin substrates have features in common. We monitor the quantity of tryptophan as well as some of its metabolic and degradation products, the kynurenines. The peak due to kynurenine fluorescence is dominant and is a conglomerate of several molecular species including L-kynurenine, 3-hydroxykynurenine and N-formylkynurenine. The ratio of tryptophan to the kynurenines depends on the type of tissue and the amount of pigmentation present. The emission wavelength also greatly depends on these factors. [ABSTRACT FROM AUTHOR]

Melanotic Neuroectodermal Tumor of Infancy (MNTI) is a rare neoplasm occurring in infants before one year of age. It is a neoplasm of fast growth that affects maxilla. In most of the cases it is benign. We reported two cases attended at the Instituto Nacional de Enfermedades Neoplásicas. The patients were two infants, of 4 and 7 months old, in the mandible and maxilla respectively. In both cases the treatment was surgical excision. The diagnosis is corroborated with Inmunohistochemestry markers, S-100, Sinaptofisin and Pankeratin. The evolution was favorable and both patients are alive. Kiru 2012;9(1): 65-70). [ABSTRACT FROM AUTHOR]

Spiny keratoderma is a rare entity characterized by the appearance of millimeter hyperkeratotic projections in palms and soles. Pathogenesis of these lesions is unknown, there have been postulated alterations in keratins in these patients, mainly in spinulose lesions, which have demonstrated the presence of keratin pilosa (AE13), which specifically is referred to as hairy bark. Spiny hyperkeratosis is classified as type Ia: parakeratotic palmoplantar, type Ib: orthokeratotic disseminated, type IIa: orthokeratotic palmoplantar, type IIb: orthokeratotic disseminated and type III: eccrine hamartoma. Spiny keratoderma cases have been associated with tumors or systemic disease. This paper describes a case with this entity. [ABSTRACT FROM AUTHOR]

Pachyonychia congenita is a rare genodermatoses, caused by mutations of keratins genes K6a, K16 (PC type I) and K6b, K17 (PC type 2). We report the case of an 8 year old patient, with congenital pachyonychia of the 20 nails, leukokeratosis oris and the absence of steatocystomas. Based on the clinical findings and the family history we considered the diagnosis of PC type 1. [ABSTRACT FROM AUTHOR]