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Peritoneal fibrosis

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https://www.readbyqxmd.com/read/28092842/blocking-tgf-%C3%AE-1-by-p17-peptides-attenuates-gastric-cancer-cell-induced-peritoneal-fibrosis-and-prevents-peritoneal-dissemination-in-vitro-and-in-vivo
#1
Zhi-Dong Lv, Wei-Jun Zhao, Li-Ying Jin, Wen-Juan Wang, Qian Dong, Na Li, Hui-Mian Xu, Hai-Bo Wang
Our previous study demonstrated that the peritoneal stroma environment favors proliferation of tumor cells by serving as a rich source of growth factors and chemokines known to be involved in tumor metastasis. In this study, we investigated the interaction between gastric cancer cells and peritoneal mesothelial cells, and determined the effects of TGF-β1 in this processing. Human peritoneal tissues and peritoneal wash fluid were obtained, which examined by hematoxylin and eosin staining or ELISA for measurements of TGF-β1 levels...
January 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28064160/specific-heparanase-inhibition-reverses-glucose-induced-mesothelial-to-mesenchymal-transition
#2
Valentina Masola, Simona Granata, Gloria Bellin, Giovanni Gambaro, Maurizio Onisto, Carlo Rugiu, Antonio Lupo, Gianluigi Zaza
BACKGROUND: Epithelial-to-mesenchymal transition (EMT) of peritoneal mesothelial cells induced by high glucose (HG) levels is a major biological mechanism leading to myofibroblast accumulation in the omentum of patients on peritoneal dialysis (PD). Heparanase (HPSE), an endoglycosidase that cleaves heparan sulfate chains, is involved in the EMT of several cell lines, and may have a major role in this pro-fibrotic process potentially responsible for the failure of dialysis. Its specific inhibition may therefore plausibly minimize this pathological condition...
January 7, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28056854/establishing-a-xenograft-mouse-model-of-peritoneal-dissemination-of-gastric-cancer-with-organ-invasion-and-fibrosis
#3
Mitsuyoshi Okazaki, Sachio Fushida, Shinichi Harada, Tomoya Tsukada, Jun Kinoshita, Katsunobu Oyama, Tomoharu Miyashita, Itasu Ninomiya, Tetsuo Ohta
BACKGROUND: The clinical prognosis of gastric cancer with peritoneal dissemination is poor because of its chemoresistance and rich fibrosis. While several gastric cancer cell lines have been used to establish models of peritoneal dissemination by intraperitoneal injection, most peritoneal tumors that form adopt a medullary pattern in microscopic appearance. This histological finding for the model differs from that in the clinical situation. This study was performed to demonstrate the contribution of human peritoneal mesothelial cells (HPMCs) to fibrotic tumor formation and to establish a new xenograft model with high potential for peritoneal dissemination with organ invasion and extensive fibrosis...
January 5, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28004069/-emodin-ameliorates-the-peritoneal-dialysis-related-peritoneal-fibrosis-via-inhibiting-the-activation-of-notch-pathway
#4
Hui-Chao Wang, Xu-Hong Lin, Xiao-Peng Fang, Xiao-Yun Mu, Tie-Jun Li, Jian-Lin Liu
Long term peritoneal dialysis (PD) is often associated with peritoneal fibrosis. The aim of this study was to explore the effect of emodin on PD-related peritoneal fibrosis and its related cellular and molecular mechanism. PD-related peritoneal fibrosis rats and cultured rat peritoneal mesothelial cells were recruited in the experiment. PD-related peritoneal fibrosis was induced by intraperitoneal injection of lactate-buffered solution containing 4.25% glucose. The peritoneal equilibrium test (PET) was performed at the end of 2 weeks, 4 weeks, and 6 weeks, respectively...
December 25, 2016: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/27998009/endometriosis-associated-infertility-aspects-of-pathophysiological-mechanisms-and-treatment-options
#5
Tom Tanbo, Peter Fedorcsak
Endometriosis is a common condition in women of reproductive age. In addition to pain, endometriosis may also reduce fertility. The causes of infertility in women with endometriosis may range from anatomical distortions due to adhesions and fibrosis to endocrine abnormalities and immunological disturbances. In some cases, the various pathophysiological derangements seem to interact by mechanisms so far not fully understood. Whether surgery should be offered as a treatment option in endometriosis-associated infertility has become controversial, partly due to its modest or undocumented effect...
December 20, 2016: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/27997892/the-role-of-tlr4-in-m1-macrophage-induced-epithelial-mesenchymal-transition-of-peritoneal-mesothelial-cells
#6
Jun Shi, Qing Li, Meixiao Sheng, Min Zheng, Manshu Yu, Lu Zhang
BACKGROUND/AIMS: Peritoneal fibrosis is a frequent complication of peritoneal dialysis that follows inflammation. It is recognized that epithelial-mesenchymal transition (EMT) of peritoneal mesothelial cells (PMCs), plays a key role in fibrogenesis. However, the relationship between inflammatory macrophages and PMCs remains elusive. In this study, we investigated the effects of different polarized macrophages on EMT of HMrSV5 PMCs. METHODS: Monocytes were polarized to M1/M2 macrophages before being added to HMrSV5 in direct or indirect contact...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27995493/expression-of-cd68-positive-macrophages-in-the-use-of-different-barrier-materials-to-prevent-peritoneal-adhesions-an-animal-study
#7
Christoph Brochhausen, Volker H Schmitt, Andreas Mamilos, Christine Schmitt, Constanze N E Planck, Taufiek K Rajab, Helmut Hierlemann, C James Kirkpatrick
In preventing postoperative adhesion formation the optimal barrier material has still not been found. It is therefore imperative to assess the biocompatibility of potential barrier devices. Macrophages play a decisive role in the regulation of wound healing, tissue regeneration and foreign body reaction. Since the number of CD68-positive macrophages represents an important parameter within biomaterial testing, in the present study it was analysed whether a correlation exists between the total number of CD68-positive macrophages and the extent of fibrosis or inflammation in peritoneal adhesion prevention using biomaterials...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27988456/acute-gastric-volvulus-a-vicious-twist-of-tummy-case-report
#8
Basudev Kumar, Tarun Kalra, Ratnakar Namdeo, Rajesh Kumar Soni, Ajit Sinha
INTRODUCTION: Gastric volvulus is an uncommon disorder and can present either in the acute or chronic setting with variable symptoms. A robust blood supply of the stomach from different sources does not allow ischemia to develop early. When it occurs in the acute scenario, patients present with severe epigastric pain and retching without vomiting. Together with inability to pass nasogastric tube, they constitute Borchardt's triad. PRESENTATION OF CASE: We report a case which presented in the emergency department with severe abdominal pain, abdominal distension and vomiting and a previous history of pulmonary tuberculosis...
December 11, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27914030/active-compounds-extracted-from-extra-virgin-olive-oil-counteract-mesothelial-to-mesenchymal-transition-of-peritoneal-mesothelium-cells-exposed-to-conventional-peritoneal-dialysate-in-vitro-and-in-vivo-evidences
#9
S Lupinacci, G Toteda, D Vizza, A Perri, C Benincasa, A Mollica, A La Russa, P Gigliotti, F Leone, D Lofaro, M Bonofiglio, E Perri, R Bonofiglio
During peritoneal dialysis (PD), peritoneal mesothelial cells undergo a transition from an epithelial phenotype to a mesenchymal phenotype that, together with the inflammatory process, promotes tissue fibrosis and a failure of peritoneal membrane function. To date, there is no definitive treatment for the progressive thickening and angiogenesis of the peritoneal membrane associated with PD. In this study we tested, in vitro and in vivo, the ability of active compounds extracted from extra virgin olive oil (AC-EVOO) to counteract the mesothelial-to-mesenchymal transition process (MMT) observed in mesothelial cells chronically exposed to the conventional peritoneal dialysate (DL)...
December 2, 2016: Journal of Nephrology
https://www.readbyqxmd.com/read/27906064/treatment-with-rgdf11-does-not-improve-the-dystrophic-muscle-pathology-of-mdx-mice
#10
Fabrizio Rinaldi, Yu Zhang, Ricardo Mondragon-Gonzalez, Jeffrey Harvey, Rita C R Perlingeiro
BACKGROUND: Duchenne muscular dystrophy (DMD) is an inherited lethal muscle wasting disease characterized by cycles of degeneration and regeneration, with no effective therapy. Growth differentiation factor 11 (GDF11), a member of the TGF-β superfamily and myostatin homologous, has been reported to have the capacity to reverse age-related skeletal muscle loss. These initial findings led us to investigate the ability of GDF11 to promote regeneration in the context of muscular dystrophy and determine whether it could be a candidate to slow down or reverse the disease progression in DMD...
June 14, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27890350/the-histophysiology-and-pathophysiology-of-the-peritoneum
#11
REVIEW
J O A M van Baal, K K Van de Vijver, R Nieuwland, C J F van Noorden, W J van Driel, A Sturk, G G Kenter, L G Rikkert, C A R Lok
The peritoneum is an extensive serous organ with both epithelial and mesenchymal features and a variety of functions. Diseases such as inflammatory peritonitis and peritoneal carcinomatosis can induce disturbance of the complex physiological functions. To understand the peritoneal response in disease, normal embryonic development, anatomy in healthy conditions and physiology of the peritoneum have to be understood. This review aims to summarize and discuss the literature on these basic peritoneal characteristics...
November 13, 2016: Tissue & Cell
https://www.readbyqxmd.com/read/27874969/idiopathic-myelofibrosis-accompanied-by-peritoneal-extramedullary-hematopoiesis-presenting-as-refractory-ascites-in-a-dog
#12
Yolandi Rautenbach, Amelia Goddard, Sarah J Clift
A 2.5-year-old spayed female American Pit Bull Terrier dog presented with a primary complaint of chronic refractory ascites. The dog's CBC displayed a moderate to severe macrocytic, hypochromic, nonregenerative anemia, and a moderate leukopenia as result of a moderate neutropenia and monocytopenia. Microscopic examination of the blood smear showed marked anisocytosis, mild polychromasia, mild acanthocytosis and ovalocytosis, moderate schistocytosis and poikilocytosis, and 4 metarubricytes/100 WBC. Abdominal ultrasonography revealed a homogenous, mild to moderately hyperechoic appearing liver as well as marked amounts of speckled anechoic to slightly hypoechoic peritoneal fluid...
November 22, 2016: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/27867039/peritoneal-dialysis-effluent-mir-21-and-mir-589-levels-correlate-with-longitudinal-change-in-peritoneal-transport-characteristics
#13
Cheuk-Chun Szeto, Kai-Ming Chow, Bonnie Ching-Ha Kwan, Phyllis Mei-Shan Cheng, Cathy Choi-Wan Luk, Jack Kit-Chung Ng, Man-Ching Law, Chi-Bon Leung, Philip Kam-Tao Li
BACKGROUND: The role of microRNA (miRNA) in peritoneal fibrosis and longitudinal change in transport is uncertain. METHODS: We studied 80 new peritoneal dialysis (PD) patients. Peritoneal transport was determined by standard peritoneal equilibration test (PET) of creatinine at baseline. Based on published literature, PD effluent levels of 10 miRNA targets were quantified. PET and miRNA quantification were repeated one year later in 46 patients. RESULTS: Baseline PD effluent levels of all targets tested had modest but significant correlation with peritoneal transport parameters...
January 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/27861745/clinical-signs-of-fibrosis-in-small-intestinal-neuroendocrine-tumours
#14
K Daskalakis, A Karakatsanis, P Stålberg, O Norlén, P Hellman
BACKGROUND: In patients with small intestinal neuroendocrine tumours (SI-NETs), serotonin and other cytokines released from tumour cells may induce fibrosis, leading to carcinoid heart disease and abdominal fibrotic reactions. The aim of this study was to assess the prevalence, clinical complications and management of this reaction in the abdomen. METHODS: This was a retrospective cohort study of patients with SI-NETs diagnosed between 1985 and 2015. Clinical data, outcomes, radiological findings, and surgical and radiological interventions were reviewed...
January 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/27805599/phenotypic-characterization-of-macrophages-from-rat-kidney-by-flow-cytometry
#15
Alfonso Rubio-Navarro, Melania Guerrero-Hue, Beatriz Martín-Fernandez, Isabel Cortegano, Elena Olivares-Alvaro, Natalia de Las Heras, Mario Alía, Belén de Andrés, María Luisa Gaspar, Jesús Egido, Juan Antonio Moreno
There is increasing evidence suggesting the important role of inflammation and, subsequently, macrophages in the development and progression of renal disease. Macrophages are heterogeneous cells that have been implicated in kidney injury. Macrophages may be classified into two different phenotypes: classically activated macrophages (M1 macrophages), that release pro-inflammatory cytokines and promote fibrosis; and alternatively activated macrophages (M2 macrophages) that are associated with immunoregulatory and tissue-remodeling functions...
October 18, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27795463/histopathological-changes-in-the-pancreas-of-cattle-with-abdominal-fat-necrosis
#16
Chikako Tani, Watanyoo Pratakpiriya, Mineto Tani, Takenori Yamauchi, Takuya Hirai, Ryoji Yamaguchi, Hitoshi Ano, Hiromu Katamoto
The association between pancreatic disorder and abdominal fat necrosis in cattle remains unclear. The pancreases of 29 slaughtered cattle with or without fat necrosis were collected to investigate pathological changes. Japanese Black (JB) cattle were classified into the FN group (with abdominal fat necrosis; n=9) and N group (without fat necrosis; n=5). The pancreases were also collected from 15 Holstein Friesian (HF) cows. All JB cattle showed high body condition scores. Regarding the pathological findings, fatty pancreas which involves adipocyte infiltration into the pancreas and fat necrosis (saponification) were observed in 25 and 27 cases, respectively...
October 30, 2016: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/27790149/co-micronized-palmitoylethanolamide-polydatin-treatment-causes-endometriotic-lesion-regression-in-a-rodent-model-of-surgically-induced-endometriosis
#17
Rosanna Di Paola, Roberta Fusco, Enrico Gugliandolo, Rosalia Crupi, Maurizio Evangelista, Roberta Granese, Salvatore Cuzzocrea
Endometriosis is a chronic, painful disease characterized by the presence of endometrial glands and stroma outside the uterine cavity. Palmitoylethanolamide (PEA), an endogenous fatty acid amide, has anti-inflammatory and neuroprotective effects. PEA lacks free radical scavenging activity, unlike polydatin (PLD), a natural precursor of resveratrol. The aim of this study was to investigate the effect of orally administered co-micronized PEA/polydatin [m(PEA/PLD)] in an autologous rat model of surgically induced endometriosis...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27789254/estimating-the-burden-of-invasive-and-serious-fungal-disease-in-the-united-kingdom
#18
Matthew Pegorie, David W Denning, William Welfare
BACKGROUND: The burden of fungal disease in the UK is unknown. Only limited data are systematically collected. We have estimated the annual burden of invasive and serious fungal disease. METHODS: We used several estimation approaches. We searched and assessed published estimates of incidence, prevalence or burden of specific conditions in various high risk groups. Studies with adequate internal and external validity allowed extrapolation to estimate current UK burden...
January 2017: Journal of Infection
https://www.readbyqxmd.com/read/27769811/aryl-hydrocarbon-receptor-ligands-in-cigarette-smoke-induce-production-of-interleukin-22-to-promote-pancreatic-fibrosis-in-models-of-chronic-pancreatitis
#19
Jing Xue, Qinglan Zhao, Vishal Sharma, Linh P Nguyen, Yvonne N Lee, Kim L Pham, Mouad Edderkaoui, Stephen J Pandol, Walter Park, Aida Habtezion
BACKGROUND & AIMS: Cigarette smoke has been identified as an independent risk factor for chronic pancreatitis (CP). Little is known about the mechanisms by which smoking promotes development of CP. We assessed the effects of aryl hydrocarbon receptor (AhR) ligands found in cigarette smoke on immune cell activation in humans and pancreatic fibrosis in animal models of CP. METHODS: We obtained serum samples from patients with CP treated at Stanford University hospital and healthy individuals (controls) and isolated CD4(+) T cells...
December 2016: Gastroenterology
https://www.readbyqxmd.com/read/27741171/gut-microbiota-and-the-liver-a-tale-of-2-cities-a-narrative-view-in-2-acts
#20
Maurizio Koch
Microbes are mostly important for the digestion of food, the absorption of some micronutrients, and the production of vitamins. The microbiota stimulates lymphoid structures in the gastrointestinal mucosa and decrease pathogens by competing for nutrients and space. Bacterial translocation is defined as the escape of gut bacteria and their products through the intestinal mucosa to the outside of the intestine as portovenous or systemic circulation. This is induced by a leaky gut barrier. There is evidence for a role of intestinal permeability in the pathogenesis of nonalcoholic fatty liver disease...
November 2016: Journal of Clinical Gastroenterology
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