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https://www.readbyqxmd.com/read/29666605/can-a-proper-t-cell-development-occur-in-an-altered-thymic-epithelium-lessons-from-ephb-deficient-thymi
#1
Juan José Muñoz, Javier García-Ceca, Sara Montero-Herradón, Beatriz Sánchez Del Collado, David Alfaro, Agustín Zapata
For a long time, the effects of distinct Eph tyrosine kinase receptors and their ligands, ephrins on the structure, immunophenotype, and development of thymus and their main cell components, thymocytes (T) and thymic epithelial cells (TECs), have been studied. In recent years, the thymic phenotype of mutant mice deficient in several Ephs and ephrins B has been determined. Remarkably, thymic stroma in these animals exhibits important defects that appear early in ontogeny but little alterations in the proportions of distinct lymphoid cell populations...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29666389/attenuated-dna-damage-responses-and-increased-apoptosis-characterize-human-hematopoietic-stem-cells-exposed-to-irradiation
#2
Shahar Biechonski, Leonid Olender, Adi Zipin-Roitman, Muhammad Yassin, Nasma Aqaqe, Victoria Marcu-Malina, Melanie Rall-Scharpf, Magan Trottier, M Stephen Meyn, Lisa Wiesmüller, Katia Beider, Yael Raz, Dan Grisaru, Arnon Nagler, Michael Milyavsky
Failure to precisely repair DNA damage in self-renewing Hematopoietic Stem and early Progenitor Cells (HSPCs) can disrupt normal hematopoiesis and promote leukemogenesis. Although HSPCs are widely considered a target of ionizing radiation (IR)-induced hematopoietic injury, definitive data regarding cell death, DNA repair, and genomic stability in these rare quiescent cells are scarce. We found that irradiated HSPCs, but not lineage-committed progenitors (CPs), undergo rapid ATM-dependent apoptosis, which is suppressed upon interaction with bone-marrow stroma cells...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29665573/placental-development-during-early-pregnancy-in-sheep-progesterone-and-estrogen-receptor-protein-expression
#3
Soumi Bairagi, Anna T Grazul-Bilska, Pawel P Borowicz, Arshi Reyaz, Veselina Valkov, Lawrence P Reynolds
The aim of this study was to evaluate the pattern of protein expression of the steroid receptor isoforms of nuclear progesterone receptors (PGR) A and B, and estrogen receptors (ESR1 and 2) in utero-placental compartments during early pregnancy. Utero-placental tissues were collected from days 14-30 (n = 4 ewes/day), and uterine tissues were collected from non-pregnant ewes on day 10 after estrus (n = 4). Cross sections of formalin-fixed and paraffin embedded tissues were immunofluorescently stained to detect PGRAB, PGRB, ESR1 and ESR2, followed by image generation of entire cross-sections of uterine and utero-placental tissues, confocal imaging of individual uterine and utero-placental compartments, and image and statistical analyses...
April 7, 2018: Theriogenology
https://www.readbyqxmd.com/read/29663855/collagen-analysis-by-second-harmonic-generation-microscopy-predicts-outcome-of-luminal-breast-cancer
#4
Rodrigo A Natal, José Vassallo, Geisilene R Paiva, Vitor B Pelegati, Guilherme O Barbosa, Guilherme R Mendonça, Caroline Bondarik, Sophie F Derchain, Hernandes F Carvalho, Carmen S Lima, Carlos L Cesar, Luís Otávio Sarian
Second-harmonic generation microscopy represents an important tool to evaluate extracellular matrix collagen structure, which undergoes changes during cancer progression. Thus, it is potentially relevant to assess breast cancer development. We propose the use of second-harmonic generation images of tumor stroma selected on hematoxylin and eosin-stained slides to evaluate the prognostic value of collagen fibers analyses in peri and intratumoral areas in patients diagnosed with invasive ductal breast carcinoma...
April 2018: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/29663469/quantitative-ultrasound-analysis-of-proximal-and-distal-cervical-tissue-echogenicity-in-premature-cervical-remodeling
#5
Matthew J Blitz, Sleiman R Ghorayeb, Sarah L Pachtman, Megan Murphy, Zara Rahman, Lakha Prasannan, Cristina P Sison, Nidhi Vohra, Burton Rochelson
OBJECTIVES: To determine whether a novel, noninvasive quantitative ultrasound (US) technique can detect differences in proximal and distal cervical tissue echogenicity in women with and without a shortened cervical length (CL). METHODS: We conducted a retrospective case-control study of singleton pregnancies at 16 to 26 weeks' gestation in which a transvaginal US examination was performed to measure CL from 2013 to 2015. Initial CLs in cases and controls were less than 2...
April 16, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29663371/distribution-of-extracellular-matrix-molecules-in-human-uterine-tubes-during-the-menstrual-cycle-a-histological-and-immunohistochemical-analysis
#6
Carlos Godoy-Guzmán, Claudio Nuñez, Pedro Orihuela, Antonio Campos, Víctor Carriel
The uterine tube (UT) is an important and complex organ of the women's reproductive system. In general, the anatomy and basic histology of this organ are well-known. However, the composition and function of the extracellular matrix (ECM) of the UT is still poorly understood. The ECM is a complex supramolecular material produced by cells which is commonly restricted to the basement membrane and interstitial spaces. ECM molecules play not only a structural role, they are also important for cell growth, survival and differentiation in all tissues...
April 16, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29663025/imaging-appearance-of-well-differentiated-liposarcomas-with-myxoid-stroma
#7
Yoav Morag, Corrie Yablon, Monica Kalume Brigido, Jon Jacobson, David Lucas
OBJECTIVE: Describe the imaging appearance of well-differentiated liposarcoma with myxoid stroma (WDLMS) and correlate with histopathology. MATERIALS AND METHODS: A keyword search of the institution medical records was performed from 1 January 2000 to 30 June 2017. The histopathology slides of cases identified in this fashion were then reviewed by a pathologist. Additional cases were prospectively collected from extramural referrals and tumor boards. Diagnostic imaging studies of pathologically proven cases of WDLMS were then reviewed in consensus and correlated with pathology...
April 16, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29662180/myc-sets-a-tumour-stroma-metabolic-loop
#8
Hilary A Coller
No abstract text is available yet for this article.
April 16, 2018: Nature Cell Biology
https://www.readbyqxmd.com/read/29660844/moray-micro-forceps-biopsy-improves-the-diagnosis-of-specific-pancreatic-cysts
#9
M Lisa Zhang, Ronald N Arpin, William R Brugge, David G Forcione, Omer Basar, Martha B Pitman
BACKGROUND: Making a specific diagnosis of pancreatic cysts preoperatively is difficult. The new disposable Moray micro forceps biopsy (MFB) device allows tissue sampling from the pancreatic cyst wall/septum and aims to improve diagnosis. This study compares the diagnostic performance of the MFB with the current conventional analysis of pancreatic cyst fluid (PCF). METHODS: A total of 48 patients sampled with MFB were identified. Cysts were classified as mucinous on PCF based on extracellular mucin/mucinous epithelium, carcinoembryonic antigen (CEA) levels ≥192 ng/mL, or KRAS/GNAS mutation...
April 16, 2018: Cancer Cytopathology
https://www.readbyqxmd.com/read/29660566/extrapleural-solitary-fibrous-tumor-a-distinct-entity-from-pleural-solitary-fibrous-tumor-an-update-on-clinical-molecular-and-diagnostic-features
#10
REVIEW
Andrea Ronchi, Immacolata Cozzolino, Federica Zito Marino, Marina Accardo, Marco Montella, Iacopo Panarese, Giuseppe Roccuzzo, Giorgio Toni, Renato Franco, Annarosaria De Chiara
Solitary fibrous tumor (SFT) is a mesenchymal neoplasm that was originally described to be localized in the pleura, but thereafter, this has been reported in several anatomic sites. Although the etiology of the neoplasm remains largely unknown, the pathogenesis seems to be related to an NAB2-STAT6 fusion gene due to paracentric inversion on chromosome 12q13. The diagnosis of extrapleural SFT is challenging, owing to its rarity, and requires an integrated approach that includes specific clinical, histological, immunohistochemical, and even molecular findings...
April 9, 2018: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/29660229/extracellular-matrix-composition-modulates-pdac-parenchymal-and-stem-cell-plasticity-and-behavior-through-the-secretome
#11
Giulia Biondani, Katrine Zeeberg, Maria Raffaella Greco, Stefania Cannone, Ilaria Dando, Elisa Dalla Pozza, Maria Mastrodonato, Stefania Forciniti, Valeria Casavola, Marta Palmieri, Stephan Joel Reshkin, Rosa Angela Cardone
Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers. Its aggressiveness is driven by an intense fibrotic desmoplastic reaction in which the increasingly collagen I-rich extracellular matrix (ECM) and several cell types, including cancer stem cells (CSCs), create a tumor-supportive environment. However, how ECM composition regulates CSC dynamics and their relationship to the principal parenchymal tumor population to promote early invasive growth is not yet characterized. For this we utilized a platform of 3D organotypic cultures composed of laminin-rich Matrigel, representative of an early tumor, plus increasing concentrations of collagen I to simulate malignant stroma progression...
April 16, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29659200/atypical-tuberous-sclerosis-complex-presenting-as-familial-renal-cell-carcinoma-with-leiomyomatous-stroma
#12
Ismaël Bah, Somayyeh Fahiminiya, Louis R Bégin, Nancy Hamel, Maria Daniela D'Agostino, Simon Tanguay, William D Foulkes
We report an atypical tuberous sclerosis complex phenotype presenting as familial multiple renal cell carcinomas with (angio)leiomyomatous stroma (5/7 familial renal cell carcinomas) on a background of multiple angiomyolipomas, hypopigmented skin macules and absence of neurological anomalies. In the index case and 3 relatives, germline genetic testing identified a heterozygous TSC2 missense pathogenic variant [c.2714 G>A, (p.Arg905Gln)], a rare TSC-associated alteration which has previously been associated with a milder TSC phenotype...
April 16, 2018: Journal of Pathology. Clinical Research
https://www.readbyqxmd.com/read/29658602/expression-and-significance-of-autonomic-nerves-and-%C3%AE-9-nicotinic-acetylcholine-receptor-in-colorectal-cancer
#13
Hui Zhou, Baojun Shi, Yitao Jia, Gang Qiu, Weiguang Yang, Jiali Li, Zhaolong Zhao, Jian Lv, Yanni Zhang, Zhongxin Li
The present study evaluated the distribution of sympathetic and parasympathetic nerves and the expression of the α9 nicotinic acetylcholine receptor (α9nAChR) and investigated their potential association with colorectal cancer (CRC) development. The distribution of autonomic nerves and α9nAChR in CRC was detected by immunohistochemistry, which was then used to analyze their association with clinicopathological parameters and prognosis. Sympathetic fibers were primarily observed in the stroma adjacent to cancer cells, whereas parasympathetic fibers were primarily observed in the stroma away from cancer cells...
April 13, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29658434/bone-marrow-derived-cells-trafficking-to-the-oviduct-effect-of-ischemia-reperfusion-injury
#14
Cagdas Sahin, Ramanaiah Mamillapalli, Hugh S Taylor
The oviduct/fallopian tube is a crucial organ in the mammalian reproductive tract; it plays a critical role in gamete transportation and early embryo development. In women, torsion of the fallopian tubes can cause ischemia and reperfusion (IR) injury. In this study, we tested the effect of this injury on recruitment of bone marrow-derived cells (BMDCs) to the oviducts of reproductive age female mice. Bone marrow-derived cells were collected from ubiquitin-green fluorescent protein-positive male mice and transplanted into wild-type female mice...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29657982/epithelial-ingrowth-following-laser-in-situ-keratomileusis-lasik-prevalence-risk-factors-management-and-visual-outcomes
#15
REVIEW
Darren Shu Jeng Ting, Sathish Srinivasan, Jean-Pierre Danjoux
The number of laser in situ keratomileusis (LASIK) procedures is continuing to rise. Since its first application for correcting simple refractive errors over 25 years ago, the role of LASIK has extended to treat other conditions, including postkeratoplasty astigmatism/ametropia, postcataract surgery refractive error and presbyopia, among others. The long-term effectiveness, predictability and safety have been well established by many large studies. However, due to the creation of a potential interface between the flap and the underlying stroma, interface complications such as infectious keratitis, diffuse lamellar keratitis and epithelial ingrowth may occur...
2018: BMJ Open Ophthalmology
https://www.readbyqxmd.com/read/29657089/mechanistic-target-of-rapamycin-mtor-protein-expression-in-the-tumor-and-its-microenvironment-correlates-with-more-aggressive-pathology-at-cystectomy
#16
Brian R Winters, Funda Vakar-Lopez, Lisha Brown, Bruce Montgomery, Roland Seiler, Peter C Black, Joost L Boormans, Marc Dall Era, Elai Davincioni, James Douglas, Ewan A Gibb, Bas W G van Rhijn, Michiel S van der Heijden, Andrew C Hsieh, Jonathan L Wright, Hung-Ming Lam
BACKGROUND: The mechanistic target of rapamycin (mTOR) has been implicated in driving tumor biology in multiple malignancies, including urothelial carcinoma (UC). We investigate how mTOR and phosphorylated mTOR (pmTOR) protein expression correlate with chemoresponsiveness in the tumor and its microenvironment at final pathologic staging after neoadjuvant chemotherapy (NAC). METHODS: A single-institution retrospective analysis was performed on 62 patients with cT2-4Nany UC undergoing NAC followed by radical cystectomy...
April 12, 2018: Urologic Oncology
https://www.readbyqxmd.com/read/29656162/effects-of-kinetin-on-plant-growth-and-chloroplast-ultrastructure-of-two-pteris-species-under-arsenate-stress
#17
Qinchun Li, Hongbin Wang, Haijuan Wang, Wen Zheng, Dongmo Wu, Zhongzhen Wang
Cytokinins (CTKs) are effective in alleviating abiotic stresses on plants, but little information is available regarding the effects of CTKs on arsenic (As) accumulation and changes of chloroplast ultrastructure in plants with different As-accumulating ability. Here a hydroponic experiment was designed to evaluate the effects of different concentration of kinetin (KT, 0-40 mg/L) on growth and chloroplast ultrastructure of As hyperaccumulator Pteris cretica var. nervosa and non-hyperaccumulator Pteris ensiformis treated by 5 mg/L arsenate for 14 days...
April 12, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29651385/clinicopathological-predictors-of-long-term-benefit-in-breast-cancer-treated-with-neoadjuvant-chemotherapy
#18
Marco Galvez, Carlos A Castaneda, Joselyn Sanchez, Miluska Castillo, Lia Pamela Rebaza, Gabriela Calderon, Miguel De La Cruz, Jose Manuel Cotrina, Julio Abugattas, Jorge Dunstan, Henry Guerra, Omar Mejia, Henry L Gomez
AIM: To investigate the survival impact of clinicopathological factors, including pathological complete response (pCR) and tumor-infiltrating lymphocytes (sTIL) levels according to subtypes, in breast cancer (BC) patients who received neo-adjuvant chemotherapy (NAC). METHODS: We evaluated 435 BC patients who presented and received NAC at the Instituto Nacional de Enfermedades Neoplasicas from 2003 to 2014. sTIL was analyzed as the proportion of tumor stroma occupied by lymphocytes, and was prospectively evaluated on hematoxylin and eosin-stained sections of the preNAC core biopsy...
April 10, 2018: World Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29651130/targeting-the-tumour-stroma-to-improve-cancer-therapy
#19
REVIEW
Kenneth C Valkenburg, Amber E de Groot, Kenneth J Pienta
Cancers are not composed merely of cancer cells alone; instead, they are complex 'ecosystems' comprising many different cell types and noncellular factors. The tumour stroma is a critical component of the tumour microenvironment, where it has crucial roles in tumour initiation, progression, and metastasis. Most anticancer therapies target cancer cells specifically, but the tumour stroma can promote the resistance of cancer cells to such therapies, eventually resulting in fatal disease. Therefore, novel treatment strategies should combine anticancer and antistromal agents...
April 12, 2018: Nature Reviews. Clinical Oncology
https://www.readbyqxmd.com/read/29650776/lymphatic-exosomes-promote-dendritic-cell-migration-along-guidance-cues
#20
Markus Brown, Louise A Johnson, Dario A Leone, Peter Majek, Kari Vaahtomeri, Daniel Senfter, Nora Bukosza, Helga Schachner, Gabriele Asfour, Brigitte Langer, Robert Hauschild, Katja Parapatics, Young-Kwon Hong, Keiryn L Bennett, Renate Kain, Michael Detmar, Michael Sixt, David G Jackson, Dontscho Kerjaschki
Lymphatic endothelial cells (LECs) release extracellular chemokines to guide the migration of dendritic cells. In this study, we report that LECs also release basolateral exosome-rich endothelial vesicles (EEVs) that are secreted in greater numbers in the presence of inflammatory cytokines and accumulate in the perivascular stroma of small lymphatic vessels in human chronic inflammatory diseases. Proteomic analyses of EEV fractions identified >1,700 cargo proteins and revealed a dominant motility-promoting protein signature...
April 12, 2018: Journal of Cell Biology
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