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Cutaneous immunohistochemistry

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https://www.readbyqxmd.com/read/28719438/comparative-analysis-of-chilblain-lupus-erythematosus-and-idiopathic-perniosis-histopathologic-features-and-immunohistochemistry-for-cd123-and-cd30
#1
Michael L Wang, May P Chan
Distinction of chilblain lupus erythematosus (CLE) from idiopathic perniosis (IP) could predict an underlying connective tissue disease; however, histopathologic discrimination of the two is difficult. Increased CD123 plasmacytoid dendritic cells and CD30 lymphocytes have been demonstrated in various forms of cutaneous lupus erythematosus and IP, respectively. To our knowledge, CD123 and CD30 have not been examined in CLE. Our objective was to identify helpful histopathologic and immunohistochemical features in distinguishing CLE and IP...
July 14, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28716437/tumor-programmed-cell-death-ligand-1-expression-correlates-with-nodal-metastasis-in-patients-with-cutaneous-squamous-cell-carcinoma-of-the-head-and-neck
#2
Juana María García-Pedrero, Pablo Martínez-Camblor, Susana Diaz-Coto, Pablo Munguia-Calzada, Aitana Vallina-Alvarez, Francisco Vazquez-Lopez, Juan Pablo Rodrigo, Jorge Santos-Juanes
BACKGROUND: Binding of tumor-expressed programmed cell death ligand 1 (PD-L1) to the programmed cell death 1 (PD-1) surface receptor blocks T-cell activation thereby leading to immune evasion. Tumor PD-L1 expression has been associated with poor outcome in a wide variety of cancers; however, data in cutaneous squamous cell carcinoma (cSCC) are scarce and conflicting. OBJECTIVE: To investigate the relationship of tumor PD-L1 expression with the clinicopathologic features and prognosis of cSCC...
July 14, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28714113/secondary-syphilis-primarily-presenting-with-multiple-nodules-on-the-scalp-case-report-and-published-work-review
#3
Fan Li, Tingting Wang, Lin Wang
Syphilis, a sexually transmitted disease caused by Treponema pallidum, manifests with a broad spectrum of clinical presentations that usually involves skin. Nodular secondary syphilis occurs rarely, and mostly manifests as disseminated papulonodules or plaques over the trunk and limbs. We report an extremely rare case of nodular secondary syphilis that primarily presented with multiple nodules on the scalp, resembling Rosai-Dorfman disease or cutaneous malignant metastasis. Immunohistochemistry confirmed T...
July 17, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28709916/lymphatic-invasion-and-the-shields-index-in-predicting-melanoma-metastases
#4
Zorica Špirić, Mirela Erić, Živka Eri
INTRODUCTION: Findings of the prognostic significance of lymphatic invasion are contradictory. To determine an as efficient cutaneous melanoma metastasis predictor as possible, Shields et al. created a new prognostic index. This study aimed to examine whether the lymphatic invasion analysis and the Shields index calculation can be used in predicting lymph node status in patients with cutaneous melanoma. METHODS: Lymphatic invasion of 100 melanoma specimens was detected by dual immunohistochemistry staining for the lymphatic endothelial marker D2-40 and melanoma cell S-100 protein...
June 13, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28693215/expression-of-foxc2-pinx1-ki-67-and-cyclin-d1-in-cutaneous-cell-carcinoma
#5
Haiying Zhao, Yunfeng Cao, Guoqiang Wang, Zengxiang Luo
We investigated the expression of FOXC2, PinX1, Ki-67 and Cyclin D1 in cutaneous cell carcinoma. We collected 30 cutaneous squamous cell carcinoma (SCC), 30 cutaneous basal cell carcinoma (BCC) and 30 normal skin tissues. The protein expression and gene expression of FOXC2, endogenous telomerase-inhibiting gene PinX1, Ki-67 and Cyclin D1 was measured by immunohistochemistry (IHC) and semi-quantitative reverse transcription polymerase chain reaction (RT-PCR), respectively. In SCC and BCC tissues, the positive rate of protein expression and mRNA level of PinX1 were both significantly lower than those in normal tissues...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28682732/microrna-155-inhibition-promoted-wound-healing-in-diabetic-rats
#6
Junna Ye, Yutian Kang, Xiaofang Sun, Pengwen Ni, Minjie Wu, Shuliang Lu
Diabetes leads to amputation in approximately 15% to 20% of patients and is associated with high morbidity and mortality. Thus, improving the quality of wound healing in this condition is essential. Diabetes is associated with acute/chronic inflammation affecting all organs especially the foot, while, inhibition of microRNA-155 (miR-155) has been reported to improve or reduce inflammatory situation. However, the role of miR-155 inhibition in promoting diabetic wound healing is not clear. To further study the potential benefit of miR-155 inhibition, a study of male Sprague-Dawley rats was conducted and diabetes was induced by injection of streptozotocin...
June 2017: International Journal of Lower Extremity Wounds
https://www.readbyqxmd.com/read/28681537/a-potential-contribution-of-psoriasin-to-vascular-and-epithelial-abnormalities-and-inflammation-in-systemic-sclerosis
#7
T Takahashi, Y Asano, T Yamashita, K Nakamura, R Saigusa, S Miura, Y Ichimura, T Toyama, M Hirabayashi, T Taniguchi, A Yoshizaki, S Sato
BACKGROUND: Antimicrobial peptides have attracted much attention as a member of disease-associated molecules in systemic sclerosis (SSc), which is pathologically characterized by immune abnormalities, vasculopathy, and tissue fibrosis. OBJECTIVE: To investigate the potential contribution of one of the anitimicrobial peptides psoriasin to the development of SSc. METHODS: Psoriasin expression in the skin samples and sera derived from SSc patients and its correlation with clinical parameters were analyzed...
July 6, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28681084/photobiomodulation-therapy-action-in-wound-repair-skin-induced-in-aged-rats-old-time-course-of-biomarkers-inflammatory-and-repair
#8
Franciane Barbieri Fiorio, Solange Almeida Dos Santos, Caroline Sobral de Melo Rambo, Camila Guerra Dalbosco, Andrey Jorge Serra, Brunno Lemes de Melo, Ernesto Cesar Pinto Leal-Junior, Paulo de Tarso Camillo de Carvalho
Previous studies have discussed an inverse correlation between age and wound healing, because it relates to the association of aging with a gradual decrease in healing capacity. Treatment with photobiomodulation therapy (PBMT) improves wound healing by inducing increases in mitotic activity, numbers of fibroblasts, collagen synthesis, and neovascularization. Therefore, this study aimed to evaluate the effects of PBMT in cutaneous wound healing in aged rats. A punch biopsy of 8 mm in diameter was performed to produce a skin wound...
July 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28680759/parallel-profiling-of-immune-infiltrate-subsets-in-uveal-melanoma-versus-cutaneous-melanoma-unveils-similarities-and-differences-a-pilot-study
#9
Yong Qin, Mariana Petaccia de Macedo, Alexandre Reuben, Marie-Andrée Forget, Cara Haymaker, Chantale Bernatchez, Christine N Spencer, Vancheswaran Gopalakrishnan, Sujan Reddy, Zachary A Cooper, Orenthial J Fulbright, Renjith Ramachandran, Arely Wahl, Esteban Flores, Shawne T Thorsen, Rene J Tavera, Claudius Conrad, Michelle D Williams, Michael T Tetzlaff, Wei-Lien Wang, Dan S Gombos, Bita Esmaeli, Rodabe N Amaria, Patrick Hwu, Jennifer A Wargo, Alexander J Lazar, Sapna P Patel
The low response rates to immunotherapy in uveal melanoma (UM) sharply contrast with reputable response rates in cutaneous melanoma (CM) patients. To characterize the mechanisms responsible for resistance to immunotherapy in UM, we performed immune profiling in tumors from 10 metastatic UM patients and 10 metastatic CM patients by immunohistochemistry (IHC). Although there is no difference in infiltrating CD8(+) T cells between UM and CM, a significant decrease in programmed death-1 (PD-1)-positive lymphocytes was observed and lower levels of programmed death ligand-1 (PD-L1) in UM metastases compared with CM metastases...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28676376/cutaneous-inflammation-regulates-thik1-expression-in-small-c-like-nociceptor-dorsal-root-ganglion-neurons
#10
William Haskins, Sergio Benitez, Juan M Mercado, Cristian G Acosta
Tandem pore-domain Halothane Inhibited K(+) channel (THIK1) is a two-pore-domain potassium channel (K2P) present in dorsal root ganglia (DRG). We previously demonstrated that THIK1 mRNA levels in the DRG dropped ipsilaterally 1day after CFA-induced cutaneous inflammation (CFA1). In this study we aimed to identify the currently unknown DRG subpopulations expressing THIK1, and to investigate the relationship between the channel and both inflammatory and spontaneous pain in normal rats. Using a combination of immunohistochemistry, western blotting and behavioural tests, we found that all small neurons and large groups of medium and large DRG neurons express THIK1...
July 1, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28666643/pd-l1-expression-predicts-longer-disease-free-survival-in-high-risk-head-and-neck-cutaneous-squamous-cell-carcinoma
#11
Edward Roper, Trina Lum, Carsten E Palme, Bruce Ashford, Sydney Ch'ng, Marie Ranson, Michael Boyer, Jonathan Clark, Ruta Gupta
Programmed cell death (PD-1) and its ligand (PD-L1) inhibitors have shown clinical response in many tumours. PD-L1 data are limited in head and neck cutaneous squamous cell carcinoma (HNcSCC) and no clinical trials of PD-1/PD-L1 inhibitors are published. We performed PD-L1 immunohistochemistry on 74 cases of high risk HNcSCC with 38 matched metastases and evaluated clinicopathological associations, prognostic significance and heterogeneity in matched metastases. We observed PD-L1 expression in >5% of primary tumour cells in 29 cases (39...
June 27, 2017: Pathology
https://www.readbyqxmd.com/read/28663082/p16-expression-in-cutaneous-squamous-cell-carcinoma-of-the-head-and-neck-is-not-associated-with-integration-of-high-risk-hpv-dna-or-prognosis
#12
Laveniya Satgunaseelan, Noel Chia, Hyerim Suh, Sohaib Virk, Bruce Ashford, Trina Lum, Marie Ranson, Jonathan Clark, Ruta Gupta
Head and neck cutaneous squamous cell carcinoma (HNcSCC) can present with cervical metastases without an obvious primary. Immunohistochemistry for p16 is established as a surrogate marker of human papillomavirus (HPV) in oropharyngeal cancer. p16 expression in HNcSCC needs to be elucidated to determine its utility in predicting the primary site. The aim of this study was to evaluate the rate of p16 expression in HNcSCC and its association with prognostic factors and survival. p16 immunohistochemistry was performed on 166 patients with high risk HNcSCC (2000-2013) following histopathology review...
June 26, 2017: Pathology
https://www.readbyqxmd.com/read/28662141/sdhd-promoter-mutations-are-rare-events-in-cutaneous-melanomas-but-sdhd-protein-expression-is-downregulated-in-advanced-cutaneous-melanoma
#13
Helena Pópulo, Rui Batista, Cristina Sampaio, Joana Pardal, José Manuel Lopes, Paula Soares
BACKGROUND: SDHD promoter mutations were reported in 4-10% of cutaneous melanomas. The advanced clinico-pathological and patient survival association with SDHD mutation and/or expression in cutaneous melanoma remains controversial. OBJECTIVES: To evaluate the presence of SDHD promoter mutations and SDHD protein expression in a melanoma series and its possible association with prognosis and survival of the patients. METHODS: We assessed SDHD promoter status in cutaneous melanomas (CM), ocular melanomas (OM) and melanoma cell lines, and the expression of SDHD protein by immunohistochemistry in CM and OM, and by western blot in melanoma cell lines...
2017: PloS One
https://www.readbyqxmd.com/read/28662116/actinic-keratosis-modelling-in-mice-a-translational-study
#14
Arnaud Pillon, Bruno Gomes, Isabelle Vandenberghe, Valérie Cartron, Patrick Cèbe, Jean-Christophe Blanchet, Vincent Sibaud, Nicolas Guilbaud, Laurent Audoly, Laurence Lamant, Anna Kruczynski
BACKGROUND: Actinic keratoses (AK) are pre-malignant cutaneous lesions caused by prolonged exposure to ultraviolet radiation. As AKs lesions are generally accepted to be the initial lesions in a disease continuum that progresses to squamous cell carcinoma (SCC), AK lesions have to be treated. They are also the second most common reason for visits to the dermatologist. Several treatments are available but their efficacy still needs to be improved. The UV-B-induced KA lesion mouse model is used in preclinical studies to assess the efficacy of novel molecules, even though it is often more representative of advanced AK or SCC...
2017: PloS One
https://www.readbyqxmd.com/read/28654578/microcystic-adnexal-carcinoma-a-review-of-the-literature
#15
Shayna Gordon, Caroline Fischer, Ann Martin, Ilana S Rosman, M Laurin Council
BACKGROUND: Microcystic adnexal carcinoma (MAC) is a rare, locally aggressive cutaneous neoplasm that commonly occurs on the face. OBJECTIVE: The purpose of this article is to comprehensively review the current literature on MAC pertaining to epidemiology, pathogenesis, clinical presentation, histology, immunohistochemistry, prognosis, follow-up, and treatment. MATERIALS AND METHODS: An extensive literature review was conducted using OVID MEDLINE and PubMed to identify articles relating to MAC...
June 23, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28654466/detection-of-beta-human-papillomavirus-in-a-child-with-polyomavirus-associated-trichodysplasia-spinulosa
#16
Pooja Kadam, Teddy Pan, Rachelle Gates, Jessica Rivetz, Peter Rady, Stephen Tyring, John A Carlson
Viral associated trichodysplasia spinulosa (VATS) is a rare cutaneous eruption characterized by folliculocentric papules, keratin spicules, and alopecia associated with trichodysplasia spinulosa-associated polyomavirus (TSPyV) infection. We report a case of a 6-year-old male child who presented with a generalized papular eruption during chemotherapy for acute lymphoblastic leukemia. The papules were tested for human papillomavirus (HPV) DNA by nested polymerase chain reaction (PCR) and TSPyV using PCR and gene sequencing studies...
June 20, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28654463/fatty-acid-synthase-and-acetyl-coa-carboxylase-are-expressed-in-nodal-metastatic-melanoma-but-not-in-benign-intracapsular-nodal-nevi
#17
Jad Saab, Maria Laureana Santos-Zabala, Massimo Loda, Edward C Stack, Travis J Hollmann
BACKGROUND: Melanoma is a potentially lethal form of skin cancer for which the current standard therapy is complete surgical removal of the primary tumor followed by sentinel lymph node biopsy when indicated. Histologic identification of metastatic melanoma in a sentinel node has significant prognostic and therapeutic implications, routinely guiding further surgical management with regional lymphadenectomy. While melanocytes in a lymph node can be identified by routine histopathologic and immunohistochemical examination, the distinction between nodal nevus cells and melanoma can be morphologically problematic...
June 13, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28648940/upregulation-of-inhibitory-signaling-receptor-programmed-death-marker-1-pd-1-in-disease-evolution-from-cutaneous-lymphoid-dyscrasias-to-mycosis-fungoides-and-sezary-s-syndrome
#18
Giang Huong Nguyen, Luke C Olson, Cynthia M Magro
BACKGROUND: Negative immunoregulatory checkpoints impede effective immune responses to tumor and reduce the action of anticancer agents. One such example is programmed death marker-1 (PD-1), an inhibitory signaling receptor expressed on activated and regulatory T-cells. PD-1 expression was reported in a few reports, but the expression profile of PD-1 and mycosis fungoides (MF) remains largely to be characterized. DESIGN: In this study, skin biopsies from 42 prelymphomatous T-cell dyscrasias (CLD), 9 Sezary's syndrome (SS), 103 MF, and 20 CD30+ lymphoproliferative diseases (LPD) were examined for PD-1 expression using immunohistochemistry...
June 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28640738/evaluation-of-the-effect-and-mechanism-of-action-of-local-phenytoin-in-treatment-of-vitiligo
#19
Asmaa Gaber Abdou, Mohammed Abdelwahed Gaber, Nada Farag Elnaidany, Ayat Elnagar
There are many theories explaining vitiligo such as genetic, autoimmune, neural, free radicals, biochemical, intrinsic defect, melanocytorrhagy and convergent theories. Phenytoin is a widely used anticonvulsant, which is used in cutaneous medicine for treatment of ulcers and epidermolysis bullosa. The aim of this study is to assess the effectiveness of topical phenytoin gel in treatment of vitiligo patients and explaining the underlying mechanism using immunohistochemistry for evaluation of HMB45, CD4 and CD8...
June 22, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28631652/primary-cutaneous-large-b-cell-lymphoma-of-scalp-case-report-of-a-rare-variant
#20
Yasmeen Khatib, Madhura Dande, Richa D Patel, Meena Makhija
Primary cutaneous large B-cell lymphoma (Bcl) is defined as a lymphoma composed of large cells constituting more than 80% of the infiltrate and absence of extracutaneous involvement after staging investigations. In the new World Health Organization/European Organization for Research and Treatment of Cancer classification, cutaneous Bcls with large cells are of three types - primary cutaneous large Bcl leg type (PCLBCLLT), primary cutaneous follicle center lymphoma diffuse type (PCFCLDT), and primary cutaneous large Bcls other (PCLBCLO)...
April 2017: Indian Journal of Pathology & Microbiology
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