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Cutaneous immunohistochemistry

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https://www.readbyqxmd.com/read/29128969/in-vasculitis-of-small-muscular-arteries-activation-of-vessel-infiltrating-cd8-t-cells-seems-to-be-antigen-independent
#1
Mikiko Kobayashi, Eisaku Ogawa, Ryuhei Okuyama, Hiroyuki Kanno
The etiology of polyarteritis nodosa (PAN) and localized PAN is still unknown, although a T cell-mediated immune mechanism has been considered. CD8 T cells participate not only in the antigen-dependent adaptive immune system, but also in the antigen-independent innate immune system. Non-antigen-activated CD8 T cells express a unique phenotype: granzyme B (GrB) positive /CD25 negative /programmed death-1 (PD-1) negative. The aims of this study were to assess the participation of T cells, especially innate CD8 T cells, in the development of vasculitis...
November 11, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/29123258/prognostic-impact-and-concordance-of-tert-promoter-mutation-and-protein-expression-in-matched-primary-and-metastatic-cutaneous-melanoma
#2
Emilia Hugdahl, May Britt Kalvenes, Monica Mannelqvist, Rita G Ladstein, Lars A Akslen
BACKGROUND: TERT promoter mutations are frequent in melanoma. Here we analysed the concordance and prognostic impact of TERT mutation and telomerase reverse transcriptase (TERT) protein expression in a large melanoma series. METHODS: In 194 primary nodular melanomas with 72 matched loco-regional metastases, TERT promoter mutation status was assessed by Sanger sequencing and TERT protein expression by immunohistochemistry. RESULTS: TERT mutations were found in 68% of primary melanomas and 64% of metastases, and the mutation status was discordant between primary tumour and metastasis in 24% of the cases...
November 9, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29109077/safety-and-efficacy-of-intratumoral-injections-of-chimeric-antigen-receptor-car-t-cells-in-metastatic-breast-cancer
#3
Julia Tchou, Yangbing Zhao, Bruce L Levine, Paul J Zhang, Megan M Davis, Jan Joseph Melenhorst, Irina Kulikovskaya, Andrea L Brennan, Xiajun Liu, Simon F Lacey, Avery Posey, Austin D Williams, Alycia So, Jose R Conejo-Garcia, Gabriela Plesa, Regina M Young, Shannon McGettigan, Jean Campbell, Robert H Pierce, Jennifer M Matro, Angela M DeMichele, Amy S Clark, Laurence J N Cooper, Lynn M Schuchter, Robert H Vonderheide, Carl H June
Chimeric antigen receptors (CARs) are synthetic molecules that provide new specificities to T cells. Although successful in treatment of hematologic malignancies, CAR T cells are ineffective for solid tumors to date. We found that the cell-surface molecule c-Met was expressed in ~50% of breast tumors, prompting the construction of a CAR T cell specific for c-Met, which halted tumor growth in immune-incompetent mice with tumor xenografts. We then evaluated the safety and feasibility of treating metastatic breast cancer with intratumoral administration of mRNA-transfected c-Met-CAR T cells in a phase 0 clinical trial (NCT01837602)...
November 6, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/29098990/hodgkin-s-lymphoma-arising-in-a-case-of-mycosis-fungoides-an-unusual-association
#4
Preeti Sharma, Surbhi Goyal, Amit Kumar Yadav, Jasmeet Singh, Ashish Kumar Mandal
Mycosis fungoides is a cutaneous T-cell lymphoma with a high risk for developing secondary malignancies, especially B-cell lymphoproliferative disorders. About 40 cases of Hodgkin's lymphoma associated with mycosis fungoides have been reported in literature till date. We report a case of a 35-year-old gentleman who presented with intensely itchy reddish lesions all over the body. Multiple skin biopsies taken from the lesions on scalp and back confirmed the clinical diagnosis of mycosis fungoides. While on treatment, he presented with multiple bilateral cervical, axillary and inguinal lymphadenopathy 9 years after the primary diagnosis of mycosis fungoides...
November 3, 2017: Indian Journal of Dermatology, Venereology and Leprology
https://www.readbyqxmd.com/read/29080365/narrow-band-uvb-effects-on-cutaneous-vitamin-d-receptor-expression-and-serum-25-hydroxyvitamin-d-in-generalized-vitiligo
#5
Hala M El-Hanbuli, Noha Mohammed Dawoud, Rania Hosny Mahmoud
Vitamin D has a role in variety of autoimmune diseases including vitiligo. Narrow band UVB (NB-UVB) treatment of vitiligo might act through its effects on vitamin D and its receptor METHODS: The present study is the first to elucidate NB-UVB effects on immunohistochemical vitamin D receptor (VDR) expression in generalized vitiligo and correlate it with serum vitamin D and repigmentation response. Using immunohistochemistry, VDR expression was estimated in skin biopsies of 30 controls and 30 vitiligo patients; from vitiligo lesion, perilesional skin at baseline and from repigmented and non responding skin after 24 NB-UVB sessions...
October 28, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/29079545/thsd7a-associated-membranous-nephropathy-in-a-patient-with-neurofibromatosis-type-1
#6
Fujun Lin, Dan Zhang, Juan Chang, Xuanli Tang, Wenbin Guan, Gengru Jiang, Chun Zhu, Fan Bian
Target antigens in idiopathic membranous nephropathy (MN) include the phospholipase A2 receptor (PLA2R), and in some cases, the thrombospondin type 1 domain-containing 7A (THSD7A). A notable phenomenon is the high rate of cancer (reported to be as high as 20%) in patients with THSD7A-associated MN. Neurofibromatosis type 1 (NF1) is an autosomal dominant disease caused by NF1 gene mutation, and clinically characterized by multiple cutaneous neurofibromas and café-au-lait spots. In this article, we report a patient with NF1 who developed THSD7A-associated MN when the NF1 skin lesions deteriorated...
October 24, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29062683/zoster-like-cutaneous-metastatic-adenocarcinoma-of-the-lung-a-case-report
#7
Kumpol Aiempanakit, Siripan Sangmala, Kanokphorn Chiratikarnwong, Sauvarat Auepemkiate
The zosteriform pattern is an infrequent cutaneous finding in oncologic patients who have a skin metastasis from a different primary source. Herein we report a case of adenocarcinoma of the lung which presented with zoster-like lesions along the thoracic dermatome. The histopathology indicated a metastatic neoplasm with variable glandular formations. Immunohistochemistry results pointed to the diagnosis of metastasized lung cancer. We suggest physicians should consider this rare diagnosis when experiencing similar cases...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/29025244/a-comparative-study-of-expression-of-fc-receptors-in-relation-to-the-autoantibody-mediated-immune-response-and-neutrophil-elastase-expression-in-autoimmune-blistering-dermatoses
#8
Justyna Gornowicz-Porowska, Agnieszka Seraszek-Jaros, Monika Bowszyc-Dmochowska, Elżbieta Kaczmarek, Paweł Pietkiewicz, Paweł Bartkiewicz, Marian Dmochowski
Here we investigated the cutaneous CD32A and CD89 expression in relation to the neutrophil elastase (NE) expression and serum level of anti-desmoglein 1 and 3 (DSG1/DSG3) IgG in pemphigus, anti-BP180/BP230 IgG in bullous pemphigoid (BP), anti-gliadin nonapeptides (npG), tissue (tTG), and epidermal transglutaminases (eTG) IgA in dermatitis herpetiformis (DH). The examined material consisted of skin/mucosal tissues and sera. In total, 87 patients were studied. Immunohistochemistry on paraffin-embedded sections with quantitative digital morphometry was used to measure the intensity of CD32A/CD89/NE expressions...
2017: Polish Journal of Pathology: Official Journal of the Polish Society of Pathologists
https://www.readbyqxmd.com/read/29023827/tnf%C3%AE-and-il-17a-are-differentially-expressed-in-psoriasis-like-vs-eczema-like-drug-reactions-to-tnf%C3%AE-antagonists
#9
C Deubelbeiss, A G A Kolios, L E French, N Yawalkar, W Kempf, K Kerl, B Meier, F Anzengruber, A A Navarini
BACKGROUND: Tumor necrosis factor α (TNFα) blocking drugs are in use for a wide range of autoimmune disorders. In up to 5% of patients, this class of drugs produces puzzling cutaneous side effects that are the subject of this investigation, namely psoriasiform and eczema-like skin inflammation. These side effects can occur after any time of treatment and regardless of the underlying disorders. The exact pathophysiology is as yet unknown. METHODS: 33 patients (19 female, average age 52 years) who had a cutaneous reaction to infliximab, adalimumab or etanercept were included...
October 10, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28977697/expression-of-fk506-binding-protein-51-fkbp51-in-mycosis-fungoides
#10
M Mascolo, M F Romano, G Ilardi, S Romano, A Baldo, M Scalvenzi, G Argenziano, F Merolla, D Russo, S Varricchio, F Pagliuca, M Russo, G Ciancia, G De Rosa, S Staibano
BACKGROUND: Mycosis fungoides (MF) is the major subtype of cutaneous T-cell lymphomas (CTCL). It usually has a prolonged indolent clinical course with a minority of cases acquiring a more aggressive biological profile and resistance to conventional therapies, partially attributed to the persistent activation of Nuclear Factor-kappa B (NF-κB) pathway. In the last decade, several papers suggested an important role for the FK506-binding protein 51 (FKBP51), an immunophilin initially cloned in lymphocytes, in the control of NF-κB pathway in different types of human malignancies...
October 4, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28975891/local-immune-response-in-cutaneous-basal-cell-carcinoma
#11
Silje Haukali Omland
BCC is an immunogenic tumor highlighted by the increased risk in immunosuppressed individuals and the frequent occurrence of tumor infiltrating lymphocytes (TILs) in the tumor surroundings. Immunotherapy is evolving as a promising treatment strategy for several cancer types where topical immunostimulators are among the possibilities for superficial BCC. The overall aim of this thesis is to characterize the immunologic response upon BCC as well as characterizing the surrounding tumor stroma. The aim was achieved by the use of a variety of laboratory techniques; immunohistochemistry, immunoflourescence, qRT-PCR and NGS...
October 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28975123/systemic-and-primary-cutaneous-anaplastic-large-cell-lymphoma-clinical-features-morphological-spectrum-and-immunohistochemical-profile
#12
Kanwardeep Singh Kwatra, Preethi A M Paul, Nalini Calton, Joseph M John, James D Cotelingam
BACKGROUND: T-cell lymphomas with anaplastic morphology typically comprise of anaplastic lymphoma kinase positive, anaplastic large cell lymphoma (ALK+ ALCL), ALK-negative ALCL (ALK- ALCL), and primary cutaneous ALCL (PC-ALCL). However, other entities such as diffuse large B-cell lymphoma, peripheral T-cell lymphoma, Hodgkin lymphoma, and undifferentiated carcinoma can also show similar anaplastic features. AIMS: To study the clinical features and histological spectrum of ALCL and emphasize the role of immunohistochemistry (IHC) in their diagnosis and categorization...
July 2017: South Asian Journal of Cancer
https://www.readbyqxmd.com/read/28969251/primary-cutaneous-amyloidosis-a-clinical-histopathological-and-immunofluorescence-study
#13
Krati Mehrotra, Rupali Dewan, Jagannath V Kumar, Abhinav Dewan
INTRODUCTION: Primary Localized Cutaneous Amyloidosis (PLCA) is a relatively rare chronic condition characterized by amyloid deposition in dermis without associated deposits in internal organs. Histopathology of cutaneous amyloidosis using Haematoxylin and Eosin (H&E) stain shows eosinophilic hyaline material in papillary dermis, which can be further confirmed by Congo Red (CR) staining or Direct Immunofluorescence (DIF) Test or immunohistochemistry. AIM: To assess the concordance between the clinical, histo pathological and DIF findings in various subtypes of (PLCA)...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28960456/primary-large-cell-neuroendocrine-carcinoma-of-the-skin-an-under-recognized-entity-and-a-mimic-of-metastatic-disease
#14
Ian Marie Lano, Daniel Rayson, Thomas Arnason, Noreen M G Walsh
Primary large cell neuroendocrine carcinomas of the skin are exceptionally rare and can be diagnosed only when a metastasis from another organ has been excluded. We report the case of a 62 year old woman with a cutaneous papule on the mid-chest which generated a differential diagnosis of vascular lesion and basal cell carcinoma. Following excision, microscopic evaluation revealed a dermal large cell undifferentiated carcinoma, with a brisk mitotic rate and focal geographic necrosis. Mucin production was absent...
September 28, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28951703/cutaneous-leukocytoclastic-vasculitis-the-role-of-lymphocytes-and-related-immune-markers
#15
Thilo Gambichler, Magdalena A Kulik, Marina Skrygan, Isabelle Rooms, Stefan Höxtermann
INTRODUCTION: Apart from neutrophils, other immune cells may play a significant pathogenetic role in cutaneous leukocytoclastic vasculitis (CLV). AIM: To investigate lymphocytes and related immunological factors in patients with CLV requiring systemic glucocorticosteroid treatment. MATERIAL AND METHODS: Fourteen patients with severe idiopathic CLV were treated with systemic prednisolone in a tapered dose regimen. Ten healthy individuals served as controls...
August 2017: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/28951515/merkel-cell-carcinoma-cardiac-metastasis-causing-cardiac-tamponade
#16
Murray Di Loreto, Roslyn Francis
We describe an unusual presentation of Merkel cell carcinoma (MCC), a rare neuroendocrine cutaneous tumour. A 59-year-old man presented with a 2-week history of dyspnoea on a background of MCC of the left elbow that was diagnosed after an axillary lymph node metastasis had appeared. He was clinically diagnosed with cardiac tamponade and received urgent pericardiocentesis. Thoracic CT imaging revealed a large infiltrating mass within the inferior aspect of the heart, confirmed to be MCC via immunohistochemistry of the pericardial fluid...
September 25, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28942760/mouse-papillomavirus-infections-spread-to-cutaneous-sites-with-progression-to-malignancy
#17
Nancy M Cladel, Lynn R Budgeon, Timothy K Cooper, Karla K Balogh, Neil D Christensen, Roland Myers, Vladimir Majerciak, Deanna Gotte, Zhi-Ming Zheng, Jiafen Hu
We report secondary cutaneous infections in the mouse papillomavirus (MmuPV1)/mouse model. Our previous study demonstrated that cutaneous MmuPV1 infection could spread to mucosal sites. Recently, we observed that mucosal infections could also spread to various cutaneous sites including the back, tail, muzzle and mammary tissues. The secondary site lesions were positive for viral DNA, viral capsid protein and viral particles as determined by in situ hybridization, immunohistochemistry and transmission electron microscopy analyses, respectively...
September 25, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28938534/targeting-of-the-mapk-and-akt-pathways-in-conjunctival-melanoma-shows-potential-synergy
#18
Jinfeng Cao, Renier C Heijkants, Aart G Jochemsen, Mehmet Dogrusöz, Mark J de Lange, Pieter A van der Velden, Sjoerd H van der Burg, Martine J Jager, Robert M Verdijk
PURPOSE: Conjunctival melanoma (CM) is a rare but lethal form of cancer. Similar to cutaneous melanoma, CM frequently carries activating mutations in BRAF and NRAS. We studied whether CM as well as conjunctival benign and premalignant melanocytic lesions express targets in the mitogen-activated protein kinase (MAPK) and AKT pathways, and whether specific inhibitors can suppress CM growth in vitro. METHODS: 131 conjunctival lesions obtained from 129 patients were collected...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28924059/pygopus2-expression-in-prostatic-adenocarcinoma-is-a-potential-risk-stratification-marker-for-psa-progression-following-radical-prostatectomy
#19
Kenneth R Kao, Paul Popadiuk, John Thoms, Satoko Aoki, Shahgul Anwar, Emily Fitzgerald, Phillip Andrews, Kim Voisey, Luis Gai, Satya Challa, Zhijian He, Paola Gonzales-Aguirre, Andrea Simmonds, Catherine Popadiuk
AIMS: Prostate cancer (PrCa) is the most frequently diagnosed non-cutaneous cancer in men. Without clear pathological indicators of disease trajectory at diagnosis, management of PrCa is challenging, given its wide-ranging manifestation from indolent to highly aggressive disease. This study examines the role in PrCa of the Pygopus (PYGO)2 chromatin effector protein as a risk stratification marker in PrCa. METHODS: RNA expression was performed in PrCa cell lines using Northern and RT-PCR analyses...
September 18, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28912854/comparative-proteomics-analysis-of-primary-cutaneous-amyloidosis
#20
Daxing Cai, Yang Li, Chunlei Zhou, Yulin Jiang, Jian Jiao, Lin Wu
Primary cutaneous amyloidosis (PCA) is a localized skin disorder that is characterized by the abnormal deposition of amyloid in the extracellular matrix (ECM) of the dermis. The pathogenesis of PCA is poorly understood. The objective of the present study was to survey proteome changes in PCA lesions in order to gain insight into the molecular basis and pathogenesis of PCA. Total protein from PCA lesions and normal skin tissue samples were extracted and analyzed using the isobaric tags for relative and absolute quantitation technique...
October 2017: Experimental and Therapeutic Medicine
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