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https://www.readbyqxmd.com/read/27920698/a-case-of-en-bloc-excision-of-a-chest-wall-leiomyosarcoma-and-closure-of-the-defect-with-non-cross-linked-collagen-matrix-egis-%C3%A2
#1
Marco Rastrelli, Saveria Tropea, Romina Spina, Alessandra Costa, Roberto Stramare, Simone Mocellin, Maria Giuseppina Bonavina, Carlo Riccardo Rossi
Sarcomas arising from the chest wall account for less than 20% of all soft tissue sarcomas, and at this site, primitive tumors are the most frequent to occur. Leiomyosarcoma is a malignant smooth muscle tumor and the best outcomes are achieved with wide surgical excision. Although advancements have been made in treatment protocols, leiomyosarcoma remains one of the more difficult soft tissue sarcoma to treat. Currently, general local control is obtained with surgical treatment with wide negative margins. We describe the case of a 50-year-old man who underwent a chest wall resection involving a wide portion of the pectoralis major and minor muscle, the serratus and part of the second, third and fourth ribs of the left side...
September 2016: Case Reports in Oncology
https://www.readbyqxmd.com/read/27919431/immunoreactivities-of-nf-%C3%AE%C2%BAb-il-1%C3%AE-and-il-1r-in-the-skin-of-chinese-brown-frog-rana-dybowskii
#2
Liqin Xi, Ruiqi Hu, Ting Guo, Yuhan Wang, Xia Sheng, Yingying Han, Zhengrong Yuan, Qiang Weng, Meiyu Xu
The cytokine interleukin-1 beta (IL-1β) is an evolutionarily conserved molecule that was originally identified in the immune system. Nuclear factor κB (NF-κB) plays a critical role in the activation of immune cells by upregulating the expression of many cytokines. In this study, we investigated the localization and expression level of IL-1β, its functional membrane receptor type I (IL-1R1) and NF-κB in the skin of Rana dybowskii during the breeding period and pre-hibernation. Histologically, the skin of Rana dybowskii consists of epidermis and dermis, and four kinds of cells were identified in the epidermis during the breeding period and pre-hibernation, while the dermis was composed of homogenous gel, mucous glands and granular glands...
December 2, 2016: Acta Histochemica
https://www.readbyqxmd.com/read/27919341/human-epidermal-stem-cells-role-in-adverse-skin-reactions-and-carcinogenesis-from-radiation
#3
Michèle T Martin, Adeline Vulin, Jolyon H Hendry
In human skin, keratinopoiesis is based on a functional hierarchy among keratinocytes, with rare slow-cycling stem cells responsible for the long-term maintenance of the tissue through their self-renewal potential, and more differentiated daughter progenitor cells actively cycling to permit epidermal renewal and turn-over every month. Skin is a radio-responsive tissue, developing all types of radiation damage and pathologies, including early tissue reactions such as dysplasia and denudation in epidermis, and later fibrosis in the dermis and acanthosis in epidermis, with the TGF-beta 1 pathway as a known master switch...
October 2016: Mutation Research
https://www.readbyqxmd.com/read/27918844/novel-method-for-facial-rejuvenation-using-er-yag-laser-equipped-with-a-spatially-modulated-ablation-module-an-open-prospective-uncontrolled-cohort-study
#4
N V Volkova, L K Glazkova, V V Khomchenko, N S Sadick
Facial aging is a complex biological process that affects the skin and superficial musculoaponeurotic system (SMAS). A new technology (RecoSMA) for skin rejuvenation based on acoustic-interference method using Er:YAG laser (2936 nm) equipped with a special module SMA that targets both the dermis and SMAS was evaluated in an open-label prospective cohort study of 100 female patients treated for facial rejuvenation. Measure of clinical improvement included investigator-rated clinical photography using the Modified Fitzpatrick Wrinkle Scale, and ultrasound measurements in the dermis a week, 30 days and six months post treatment...
December 5, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/27918009/optical-properties-of-porcine-dermis-in-the-mid-infrared-absorption-band-of-glucose
#5
Arthur Schönhals, Hans Tholl, Mathias Glasmacher, Niels Kröger-Lui, Annemarie Pucci, Wolfgang Petrich
The optical properties of skin in the mid-infrared range are not known, despite their importance for e.g. non-invasive glucose monitoring. In this paper, transmission, absorption, scattering, and reduced scattering coefficients are quantified using a custom-built goniometer based on a quantum cascade laser operated at the glucose absorption band at a wavelength of around 9.7 μm. The measurements show a strong dominance of absorption and moderate contributions from scattering. The scattered radiation is dominated by single scattering events in the forward direction (g = 0...
December 5, 2016: Analyst
https://www.readbyqxmd.com/read/27909082/proteomic-investigation-of-dermal-fibroblasts-isolated-from-affected-and-unaffected-skin-samples-from-patients-with-limited-cutaneous-systemic-sclerosis-2-distinct-entities
#6
Claudio Corallo, Annalisa Santucci, Giulia Bernardini, Natale Figura, Roberto Leoncini, Giulia Riolo, Antonio Montella, Chiara Chirico, Ranuccio Nuti, Nicola Giordano
OBJECTIVE: To identify using proteomic analysis the proteins of altered abundance in the affected and unaffected limited cutaneous systemic sclerosis (lcSSc) skin fibroblasts. METHODS: Excision biopsies (3 mm) were obtained from the affected and unaffected skin of 5 patients with lcSSc. Dermal fibroblasts were isolated enzymatically. Two-dimensional gel electrophoresis was used to separate and define proteins in affected and unaffected fibroblast lysates. Proteins of altered abundance were identified by mass spectrometry...
December 1, 2016: Journal of Rheumatology
https://www.readbyqxmd.com/read/27907906/senescent-fibroblast-derived-chemerin-promotes-squamous-cell-carcinoma-migration
#7
Vida Farsam, Abhijit Basu, Martina Gatzka, Nicolai Treiber, Lars A Schneider, Medhanie A Mulaw, Tanja Lucas, Stefan Kochanek, Reinhard Dummer, Mitchell P Levesque, Meinhard Wlaschek, Karin Scharffetter-Kochanek
Aging is associated with a rising incidence of cutaneous squamous cell carcinoma (cSCC), an aggressive skin cancer with the potential for local invasion and metastasis. Acquisition of a senescence-associated secretory phenotype (SASP) in dermal fibroblasts has been postulated to promote skin cancer progression in elderly individuals. The underlying molecular mechanisms are largely unexplored. We show that Chemerin, a previously unreported SASP factor released from senescent human dermal fibroblasts, promotes cSCC cell migration, a key feature driving tumor progression...
November 18, 2016: Oncotarget
https://www.readbyqxmd.com/read/27907099/analysis-of-a-mouse-skin-model-of-tuberous-sclerosis-complex
#8
Yanan Guo, John R Dreier, Juxiang Cao, Heng Du, Scott R Granter, David J Kwiatkowski
Tuberous Sclerosis Complex (TSC) is an autosomal dominant tumor suppressor gene syndrome in which patients develop several types of tumors, including facial angiofibroma, subungual fibroma, Shagreen patch, angiomyolipomas, and lymphangioleiomyomatosis. It is due to inactivating mutations in TSC1 or TSC2. We sought to generate a mouse model of one or more of these tumor types by targeting deletion of the Tsc1 gene to fibroblasts using the Fsp-Cre allele. Mutant, Tsc1ccFsp-Cre+ mice survived a median of nearly a year, and developed tumors in multiple sites but did not develop angiomyolipoma or lymphangioleiomyomatosis...
2016: PloS One
https://www.readbyqxmd.com/read/27906851/silk-ligation-delay-for-the-random-pattern-flap
#9
Lei Liu, Chen Zhang, Haizhou Tong, Tao Song, Ningbei Yin, Haidong Li, Zhenmin Zhao
OBJECTIVE: The purpose of this study is to explore a silk ligation delay for the expanded and unexpanded random flaps to improve the vascularization and survival length of the flap. METHODS: Marked incision points 2 to 3 cm at every interval along the design line with methylene blue, each incision was about 3 mm long. A subepidermal tunnel was formed on the superfacial layer of dermis between every adjacent incision; another gap was done on the surface of the expander...
November 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27906695/metformin-induced-generalized-fixed-drug-eruption-with-cutaneous-hemophagocytosis
#10
Jose Luis Rodríguez-Belver, Joaquin Lopez, Elena Macias, Laura Fuertes, Irene Andres, Victoria Alegria, Ignacio Gimeno, Alejandra Perez, Yosmar Perez, Luis Requena
Fixed drug eruption (FDE) consists of recurrent dusky-red to brownish macules or patches at the same sites after the readministration of the causative drug. It usually presents as a solitary lesion, but generalized eruptions have been described. The most frequently implied drugs are antibiotics, anticonvulsants, and analgesics. Only 2 cases due to metformin have been reported. Histopathologic features of FDE include vacuolar degeneration of the basal layer, necrotic keratinocytes, and superficial and deep perivascular lymphocytic infiltrate...
November 29, 2016: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/27906694/follicular-malignant-melanoma-a-rare-morphologic-variant-of-melanoma-report-of-a-case-and-review-of-the-literature
#11
Iona Chapman, Sharon Horton, Wenhua Liu
Follicular malignant melanoma (FMM) is an exceedingly rare variant of melanoma. Only 8 cases have been reported in the literature thus far. Often bland on physical examination, FMM shows a striking histologic pattern, with atypical melanocytes sometimes consuming the entire follicle and extending into the dermis. Criteria have been suggested to help distinguish FMM from lentigo maligna melanoma; however, no clear criteria distinguish this cancer clinically. FMM cannot be distinguished from follicular metastases of melanoma based on histology, requiring close clinical correlation and detailed history taking on the part of the practitioner...
November 29, 2016: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/27904075/in-vitro-permeation-and-skin-retention-of-%C3%AE-mangostin-proniosome
#12
Gan Siaw Chin, Hiroaki Todo, Wesam Radhi Kadhum, Mariani Abdul Hamid, Kenji Sugibayashi
The current investigation evaluated the potential of proniosome as a carrier to enhance skin permeation and skin retention of a highly lipophilic compound, α-mangostin. α-Mangostin proniosomes were prepared using the coacervation phase seperation method. Upon hydration, α-mangostin loaded niosomes were characterized for size, polydispersity index (PDI), entrapment efficiency (EE) and ζ-potential. The in vitro permeation experiments with dermis-split Yucatan Micropig (YMP) skin revealed that proniosomes composed of Spans, soya lecithin and cholesterol were able to enhance the skin permeation of α-mangostin with a factor range from 1...
2016: Chemical & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27903444/design-of-an-elastin-layered-dermal-regeneration-template
#13
Suzanne M Mithieux, Anthony S Weiss
: We demonstrate a novel approach for the production of tunable quantities of elastic fibers. We also show that exogenous tropoelastin is rate-limiting for elastin synthesis regardless of the age of the dermal fibroblast donor. Additionally, we provide a strategy to further enhance synthesis by older cells through the application of conditioned media. We show that this approach delivers an elastin layer on one side of the leading dermal repair template for contact with the deep dermis in order to deliver prefabricated elastic fibers to a physiologically appropriate site during subsequent surgery...
November 26, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27902740/extensive-characterization-and-comparison-of-endothelial-cells-derived-from-dermis-and-adipose-tissue-potential-use-in-tissue-engineering
#14
Hanneke N Monsuur, Ester M Weijers, Frank B Niessen, Amit Gefen, Pieter Koolwijk, Susan Gibbs, Lenie J van den Broek
Tissue-engineered constructs need to become quickly vascularized in order to ensure graft take. One way of achieving this is to incorporate endothelial cells (EC) into the construct. The adipose tissue stromal vascular fraction (adipose-SVF) might provide an alternative source for endothelial cells as adipose tissue can easily be obtained by liposuction. Since adipose-EC are now gaining more interest in tissue engineering, we aimed to extensively characterize endothelial cells from adipose tissue (adipose-EC) and compare them with endothelial cells from dermis (dermal-EC)...
2016: PloS One
https://www.readbyqxmd.com/read/27896881/nympho-hymenal-tear-a-distinctive-entity
#15
Giang Huong Nguyen, Nicklaus Lang, Stephan Lautenschlager
Vulvar fissures are linear tears extending into the dermis. When in the posterior fourchette, it is known as granuloma fissuratum plicae labioalveolaris, or vulvar granuloma fissuratum, a term first described by Sutton et al. in 1932. (1) The other pattern are small fissures occurring at other vulvar locations, and sexually active patients report entry dyspareunia. (2-8) In majority of cases, vulvar fissures are secondary findings in a plethora of inflammatory dermatoses or infections, rarely, can occur as primary findings without any apparent causes...
November 29, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27895450/dermatofibrosarcoma-protuberans-a-case-report-and-review-of-the-literature
#16
D Paramythiotis, G Stavrou, D Panagiotou, G Petrakis, A Michalopoulos
BACKGROUND: Dermatofibrosarcoma protuberans (DFSP) represents less than 0.1% of all tumors, but it is considered the most common skin sarcoma. Wide local excision (=5 cm) has been largely replaced by Mohs micrographic surgery; however, recurrence is not rare. Description of the case: A 35-year-old man presented with a large tumor on the upper side of his back and underwent local excision with the possible preoperative diagnosis of lipoma. Upon histological examination, the diagnosis of DFSP was made, and the patient underwent wide local excision with skin flap reconstruction and was referred for adjuvant radiotherapy...
January 2016: Hippokratia
https://www.readbyqxmd.com/read/27894778/stem-cells-in-psoriasis
#17
REVIEW
Ruixia Hou, Junqin Li, Xuping Niu, Ruifeng Liu, Wenjuan Chang, Xincheng Zhao, Qiang Wang, Xinhua Li, Guohua Yin, Kaiming Zhang
Psoriasis is a complex chronic relapsing inflammatory disease. Although the exact mechanism remains unknown, it is commonly accepted that the development of psoriasis is a result of multi-system interactions among the epidermis, dermis, blood vessels, immune system, neuroendocrine system, metabolic system, and hematopoietic system. Many cell types have been confirmed to participate in the pathogenesis of psoriasis. Here, we review the stem cell abnormalities related to psoriasis that have been investigated recently...
November 15, 2016: Journal of Dermatological Science
https://www.readbyqxmd.com/read/27894386/-study-of-the-correlation-between-the-expression-of-angiotensin-%C3%A2-and-its-receptors-and-collagen-deposition-in-human-keloid
#18
J J Chen, X J Wu, Z Y Zhang, Z X Chen, Y Cen
Objective: To study the correlation between the expression of angiotensin Ⅱ, angiotensin Ⅱ type 1 receptor (AT1R), angiotensin Ⅱ type 2 receptor (AT2R) and collagen deposition in human keloid. Methods: The keloid from 19 keloid patients and normal skin from 13 patients performed with free skin transplantation hospitalized in our unit from May 2014 to January 2015 were obtained. The expressions of angiotensin Ⅱ, AT1R, and AT2R were detected by immunohistochemical staining, and the results were semi-quantitatively analyzed by immunohistochemical scoring...
November 20, 2016: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/27893746/mast-cells-are-abundant-in-primary-cutaneous-t-cell-lymphomas-results-from-a-computer-aided-quantitative-immunohistological-study
#19
Johanna Eder, Radu Rogojanu, Waltraud Jerney, Friedrich Erhart, Alexander Dohnal, Melitta Kitzwögerer, Georg Steiner, Julia Moser, Franz Trautinger
BACKGROUND: Mast cells (MC) are bone marrow derived haematopoetic cells playing a crucial role not only in immune response but also in the tumor microenvironment with protumorigenic and antitumorigenic functions. The role of MC in primary cutaneous T-cell lymphomas (CTCL), a heterogeneous group of non-Hodgkin lymphomas with initial presentation in the skin, is largely unknown. OBJECTIVE: To gain more accurate information about presence, number, distribution and state of activation (degranulated vs...
2016: PloS One
https://www.readbyqxmd.com/read/27893633/the-study-of-medial-superficial-perforator-of-the-superficial-circumflex-iliac-artery-perforator-flap-using-ct-angiography-and-surgical-anatomy-in-142-patients
#20
Hyun Suk Suh, Hyung Hwa Jeong, Joon Pio Hong
BACKGROUND: The two major perforators supplying the superficial circumflex iliac artery perforator (SCIP) flap are the medial (superficial) and lateral (deep) perforators but lacks detailed description. The purpose of this study was to clarify the anatomy. MATERIAL AND METHOD: In a prospective analysis of 142 patients, CT angiograms of 284 SCIP regions were evaluated and 142 SCIP flaps were surgically correlated. The origin of the SCIA, the origin of the medial perforator, the location where it penetrates the deep fascia, and its pattern of pathway after penetration of the superficial fascia were evaluated...
November 21, 2016: Plastic and Reconstructive Surgery
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