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https://www.readbyqxmd.com/read/29240251/progenitor-cells-from-different-zones-of-human-cartilage-and-their-correlation-with-histopathological-osteoarthritis-progression
#1
V P Mantripragada, W A Bova, C Boehm, N S Piuzzi, N A Obuchowski, R J Midura, G F Muschler
Cell-based therapies development for the treatment of osteoarthritis (OA) requires an understanding of the disease progression and attributes of the cells resident in cartilage. This study focused on quantitative assessment of the concentration and biological potential of stem and progenitor cells resident in different zones of cartilage displaying macroscopic Outerbridge grade 1-2 OA, and their correlation with OA progression based on established histologic scoring system. Lateral femoral condyles were collected from fifteen patients with idiopathic OA and varus knees undergoing total knee arthroplasty...
December 14, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29216530/brain-angiometastasis-from-a-non-seminomatous-germ-cell-tumor-a-case-report
#2
Alejandro Monroy-Sosa, Gervith Reyes-Soto, Bernardo Cacho-Díaz, Martín Granados-García, Allan Hernández Estrada, Ana María Cano-Valdez, Ángel Herrera-Gómez
INTRODUCTION: Brain metastasis from non-seminomatous germ cell tumors (NSGCT) is rare. Herein, we describe the second reported case of brain metastasis from a NSGCT with high-flow arteriovenous (AV) shunts, and propose a novel surgical treatment plan. CLINICAL CASE: The patient was a 34-year-old male who presented with hemiparesis and hemianesthesia. Magnetic resonance angiography revealed three vascular lesions with afferent vessels and efferent vessels. Angiography displayed two high-flow AV shunts...
December 2, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29212544/plaque-volume-and-plaque-risk-profile-in-diabetic-vs-non-diabetic-patients-undergoing-lipid-lowering-therapy-a-study-based-on-3d-intravascular-ultrasound-and-virtual-histology
#3
Tomas Kovarnik, Zhi Chen, Gary S Mintz, Andreas Wahle, Kristyna Bayerova, Ales Kral, Martin Chval, Karel Kopriva, John Lopez, Milan Sonka, Ales Linhart
BACKGROUND: Coronary atherosclerosis progresses faster in patients with diabetes mellitus (DM) and causes higher morbidity and mortality in such patients compared to non-diabetics ones (non-DM). We quantify changes in plaque volume and plaque phenotype during lipid-lowering therapy in DM versus non-DM patients using advanced intracoronary imaging. METHODS: We analyzed data from 61 patients with stable angina pectoris included to the PREDICT trial searching for prediction of plaque changes during intensive lipid-lowering therapy (40 mg rosuvastatin daily)...
December 7, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29193449/characterization-of-glioblastoma-in-an-orthotopic-mouse-model-with-magnetic-resonance-elastography
#4
Katharina Schregel, Navid Nazari, Michal O Nowicki, Miklos Palotai, Sean E Lawler, Ralph Sinkus, Paul E Barbone, Samuel Patz
Glioblastoma (GBM) is the most common primary brain tumor. It is highly malignant and has a correspondingly poor prognosis. Diagnosis and monitoring are mainly accomplished with MRI, but remain challenging in some cases. Therefore, complementary methods for tumor detection and characterization would be beneficial. Using magnetic resonance elastography (MRE), we performed a longitudinal study of the biomechanical properties of intracranially implanted GBM in mice and compared the results to histopathology. The biomechanical parameters of viscoelastic modulus, shear wave speed and phase angle were significantly lower in tumors compared with healthy brain tissue and decreased over time with tumor progression...
November 29, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29181641/effect-of-photobiomodulation-on-connective-tissue-remodeling-and-regeneration-of-skeletal-muscle-in-elderly-rats
#5
Adriana de Brito, Agnelo Neves Alves, Beatriz Guimaraes Ribeiro, Daniel Victor D Emilio Barbosa, Erick Moreno Ramos Magalhaes, Kristianne Porta Santos Fernandes, Sandra Kalil Bussadori, Juliana Barbosa Goulardins, Raquel Agnelli Mesquita-Ferrari
The purpose of this study was to evaluate the effects of low-level laser therapy (LLLT) on morphological aspects, IL-6 and IL-1β expressions, as well as the distribution and organization of collagen in the tibialis anterior (TA) muscle of elderly rats submitted to cryoinjury. Histological photomicrographs were taken of TA muscles stained with HE and picrosirius red. Immunohistochemistry was used for the evaluation of IL-6 and IL-1β. Male Wistar rats, aged 20 months, were distributed into three groups: (1) control animals not injured or treated with LLLT (n = 5), (2) cryoinjury without LLLT treatment (n = 15), and (3) cryoinjury treated with infrared LLLT (n = 15)...
November 27, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29175268/peripheral-vascular-atherosclerosis-in-a-novel-pcsk9-gain-of-function-mutant-ossabaw-miniature-pig-model
#6
Ahmad F Hedayat, Kyoung-Ha Park, Taek-Geun Kwon, John R Woollard, Kai Jiang, Daniel F Carlson, Amir Lerman, Lilach O Lerman
Hypercholesterolemia is a major risk factor for atherosclerosis. Remaining challenges in the management of atherosclerosis necessitate development of animal models that mimic human pathophysiology. We characterized a novel mutant pig model with DNA transposition of D374Y gain-of-function (GOF) cDNA of chimp proprotein convertase subtilisin/kexin type-9 (PCSK9), and tested the hypothesis that it would develop peripheral vascular remodeling and target organ injury in the kidney. Wild-type or PCSK9-GOF Ossabaw miniature pigs fed a standard or atherogenic diet (AD) (n = 7 each) were studied in vivo after 3 and 6 months of diet...
November 3, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29173610/endothelial-nitric-oxide-synthase-induced-hypertrophy-and-vascular-dysfunction-contribute-to-the-left-ventricular-dysfunction-in-caveolin-1-mice
#7
Annette Ebner, Nadine Kuerbis, Aljoscha Brandt, Birgit Zatschler, Sönke Weinert, David M Poitz, Bernd Ebner, Antje Augstein, Carsten Wunderlich, Ali El-Armouche, Ruth H Strasser
BACKGROUND: Caveolin-1 (Cav1)-/- mice display impaired development of left ventricular pressure and increased left ventricular wall thickness but no dilated ventricle; these are typical findings in patients with heart failure with preserved ejection fraction (HfpEF). Aiming to clarify if dysfunctional endothelial nitric oxide synthase (eNOS) influences cardiomyocyte contractility, cardiac conduction system, or afterload/vascular resistance, we studied Cav1-/-/eNOS-/- mice. METHODS: Cardiac function was assessed in vivo by pressure-volume-catheterization of the left ventricle, echocardiography and electrocardiography...
December 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/29167169/cutting-edge-microangio-ct-new-dimensions-in-vascular-imaging-and-kidney-morphometry
#8
Ruslan Hlushchuk, Cédric Zubler, Sébastien Barré, Carlos Correa Shokiche, Laura Schaad, Raphael Röthlisberger, Monika L Wnuk, Christoph Daniel, Oleksiy Khoma, Stefan A Tschanz, Mauricio Reyes, Valentin Djonov
In the last decades the contrast-enhanced microCT-imaging of whole animal kidney became increasingly important. The visualization was mainly limited to middle-sized vessels. Since modern desktop microCT-scanners provide the necessary detail resolution, we developed an approach for rapid visualization and consistent assessment of kidney vasculature and glomeruli number. This method is based on μAngiofil®, a new polymerizing contrast agent with homogenous X-ray absorption, which provides continuous filling of the complete vasculature and enables correlative imaging approaches...
November 22, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29155760/echocardiographic-and-histological-examination-of-cardiac-morphology-in-the-mouse
#9
Delphine Baudouy, Jean-François Michiels, Ana Vukolic, Kay-Dietrich Wagner, Nicole Wagner
An increasing number of genetically modified mouse models has become available in recent years. Moreover, the number of pharmacological studies performed in mice is high. Phenotypic characterization of these mouse models also requires the examination of cardiac function and morphology. Echocardiography and magnetic resonance imaging (MRI) are commonly used approaches to characterize cardiac function and morphology in mice. Echocardiographic and MRI equipment specialized for use in small rodents is expensive and requires a dedicated space...
October 26, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29136193/early-first-trimester-uteroplacental-flow-and-the-progressive-disintegration-of-spiral-artery-plugs-new-insights-from-contrast-enhanced-ultrasound-and-tissue-histopathology
#10
V H J Roberts, T K Morgan, P Bednarek, M Morita, G J Burton, J O Lo, A E Frias
STUDY QUESTION: Does the use of a vascular contrast agent facilitate earlier detection of maternal flow to the placental intervillous space (IVS) in the first trimester of pregnancy? SUMMARY ANSWER: Microvascular filling of the IVS was demonstrated by contrast-enhanced ultrasound from 6 weeks of gestation onwards, earlier than previously believed. WHAT IS KNOWN ALREADY: During placental establishment and remodeling of maternal spiral arteries, endovascular trophoblast cells invade and accumulate in the lumen of these vessels to form 'trophoblast plugs'...
November 10, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29135136/-structural-morphological-changes-of-the-connective-tissue-of-the-vaginal-mucosa-and-perineal-skin-in-women-with-stress-urinary-incontinence
#11
V N Pavlov, A G Yashchuk, A A Kazikhinurov, I I Musin, R M Zauinullina, V A Kulavskii, A A Kazikhinurova
AIM: To investigate the morphological and structural changes in the connective tissue of the vaginal mucosa and perineal skin in women with stress urinary incontinence. MATERIALS AND METHODS: From 2010 to 2013, 71 patients of reproductive age with stress incontinence were observed. The control group comprised 80 women, who also underwent biopsy of the vaginal mucosa and perineal skin. The sections of specimens were stained by Van Gieson, Mallory and Weigert. In immunohistochemical studies, rabbit antibodies specific for collagen types I, III, and IV were placed on each section...
October 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/29115861/postnatal-overnutrition-affects-metabolic-and-vascular-function-reflected-by-physiological-and-histological-changes-in-the-aorta-of-adult-wistar-rats
#12
Gerardo Sánchez-García, Laura Del Bosque-Plata, Enrique Hong
Rigorous nutritional care during early life leads to healthy adulthood. Cardiovascular and metabolic disorders, the most prevalent clinical challenges worldwide, are epidemiologically linked to poor nutritional habits throughout life. We aimed to understand whether postnatal overnutrition (PO) initiated during lactation affects metabolic markers and vascular function later in life. To test this hypothetical effect, we studied a PO Wistar rat model based on adjusting litter size at the third day of age to three pups and eight for the control group (C)...
November 8, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29105637/detection-of-ad-bmp-2-ires-hif-1%C3%AE-mu-on-local-promoting-angiogenic-and-osteogenic-capacity-of-necrosis-area
#13
Fuai Cui, Xiuli Wang, Wei Wang, Peng Xiao, Yuan Ma, Lindong Jiang
The induced EPCs were transfected by Ad-BMP-2-IRES-HIF-1αmu, and then transplanted into femoral head necrotic zone, the effect on osteogenesis and agiogenesis of necrosis zone was detected. The Ad-BMP-2-IRES-HIF-1α was transfected into induced EPCs and then transplanted into avascular necrotic parts of the femoral head (ANFH).Afterwards, the promotion effect on angiogenic and osteogenic capabilities of the necrosis parts from Ad-BMP-2-IRES-HIF-1α was detected. Rabbit bone marrow MNCs were obtained by density gradient centrifugation method, and were induced into EPCs by M199 medium; EPCs were identified in accordance with the cell morphology, specific surface markers and uptake abilities...
September 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29099710/vitamins-d-and-e-combined-effect-on-the-rat-myocardium-under-alloxan-induced-diabetes
#14
B Osipiani, T Machavariani, T Gvamichava, I Gachechiladze, E Nikobadze
It is commonly known that in diabetes mellitus the risk of cardiovascular diseases and mortality increases. The purpose of this study was to determine the specific features of the morphological restructuring of the myocardium in the early stage of experimental diabetes and use the combined impact of powerful antioxidants (Vitamin C and Vitamin E) on the rat myocardium in conditions of alloxan-induced diabetes. The experimental animals were divided into three groups: 40 rats were the target, and 20 rats were the control...
October 2017: Georgian Medical News
https://www.readbyqxmd.com/read/29070043/the-effect-of-renal-denervation-in-an-experimental-model-of-chronic-renal-insufficiency-the-remnant-kidney-denervation-in-pigs-study-redip-study
#15
Jean-Claude Lubanda, Miroslav Chochola, Mikuláš Mlček, Petr Neužil, Josef Marek, Štěpán Havránek, Sylvie Kuchynková, Zdeňka Fingrová, Kao-Hsuan Aimee Huang, Aleš Linhart
BACKGROUND: Renal denervation (RDN) is a promising therapeutic method in cardiology. Its currently most investigated indication is resistant hypertension. Other potential indications are atrial fibrillation, type 2 diabetes mellitus and chronic renal insufficiency among others. Previous trials showed conflicting but promising results, but the real benefits of RDN are still under investigation. Patients with renal insufficiency and resistant hypertension are proposed to be a good target for this therapy due to excessive activation of renal sympathetic drive...
October 25, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29065437/basic-bli-adenoma-serrated-international-classification-classification-for-colorectal-polyp-characterization-with-blue-light-imaging
#16
Raf Bisschops, Cesare Hassan, Pradeep Bhandari, Emmanuel Coron, Helmut Neumann, Oliver Pech, Loredana Correale, Alessandro Repici
Backgound and study aim Advanced endoscopic imaging has revolutionized the characterization of lesions during colonoscopy. The aim of this study was to create a new classification for differentiating subcentimetric hyperplastic and adenomatous polyps, and deeply invasive malignant lesions using blue-light imaging (BLI) with high definition, with and without optical magnification, as well as to assess its interobserver concordance. Methods A video library consisting of 48 videos/still images (with/without optical magnification) from 24 histologically verified polyps/cancer with BLI was prospectively created...
October 24, 2017: Endoscopy
https://www.readbyqxmd.com/read/29064803/morphological-substantiation-for-acute-immobilization-stress-related-disorders-of-adaptation-mechanisms
#17
Mykhailo M Koptev, Nataliia I Vynnyk
INTRODUCTION: Nowadays, an individual is being constantly accompanied by stresses in his/her everyday life. Stress reactions, produced in the process of evolution, have become the organisms' response to emergency action or pathological factors and are the important link in adaptation process. However, the adverse course of stress reaction can lead to derangement of the adaptation mechanisms in the body and become the element of the pathogenesis of various diseases. THE AIM: The study was aimed at morphological substantiation of derangement of adaptation mechanisms in white Wistar rats caused by the acute immobilization stress...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29058797/the-fabrication-of-3d-surface-scaffold-of-collagen-poly-l-lactide-co-caprolactone-with-dynamic-liquid-system-and-its-application-in-urinary-incontinence-treatment-as-a-tissue-engineered-sub-urethral-sling-in-vitro-and-in-vivo-study
#18
Kaile Zhang, Nailong Cao, Xuran Guo, Qingsong Zou, Shukui Zhou, Ranxing Yang, Weixin Zhao, Xiumei Mo, Wei Liu, Qiang Fu
AIMS: To fabricate a novel nanoyarn biomaterial via a dynamic liquid electrospinning system, and to simultaneously evaluate whether nanoyarn is capable of being applied as a urinary sling for future clinical transfer. METHODS: Nanoyarn was cultured with adipose-derived stem cells (ADSCs). Cell morphology and function were observed on nanoyarn. Female rats that underwent vagina dilatation (VD) and bilateral ovarian resection (BOR) were used as the urinary incontinence model...
October 23, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29047209/effects-of-cryopreservation-on-adipose-tissue-derived-microvascular-fragments
#19
Matthias W Laschke, Philipp Karschnia, Claudia Scheuer, Alexander Heß, Wolfgang Metzger, Michael D Menger
Adipose tissue-derived microvascular fragments (ad-MVF) are effective vascularization units for tissue engineering. They rapidly reassemble into new microvascular networks after seeding on scaffolds and subsequent in vivo implantation. Herein, we analyzed whether the vascularization capacity of ad-MVF is affected by cryopreservation. Ad-MVF were isolated from the epididymal fat pads of C57BL/6 mice and cryopreserved for 7 days to compare their morphology, viability, cellular composition and protein expression with freshly isolated control ad-MVF...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28981171/construction-of-tissue-engineered-lymphatic-vessel-using-human-adipose-derived-stem-cells-differentiated-lymphatic-endothelial-like-cells-and-decellularized-arterial-scaffold-a-preliminary-study
#20
Yi Yang, Jian-Tao Yang, Xiao-Hu Chen, Ben-Gang Qin, Fu-Gui Li, Yun-Xian Chen, Li-Qiang Gu, Jia-Kai Zhu, Ping Li
We have previously demonstrated that human adipose-derived stem cells (hADSCs) can be differentiated into lymphatic endothelial like cells. The purpose of this study was to investigate the feasibility of utilizing the induced lymphatic endothelial like cells and decellularized arterial scaffold to construct the tissue-engineered lymphatic vessel. The hADSCs were isolated from adipose tissue in healthy adults and were characterized the multilineage differentiation potential. Decellularized arterial scaffold was prepared using the Triton x-100 method...
October 5, 2017: Biotechnology and Applied Biochemistry
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