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Exocrine pancreas

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https://www.readbyqxmd.com/read/29769672/pancreas-regeneration
#1
REVIEW
Qiao Zhou, Douglas A Melton
The pancreas is made from two distinct components: the exocrine pancreas, a reservoir of digestive enzymes, and the endocrine islets, the source of the vital metabolic hormone insulin. Human islets possess limited regenerative ability; loss of islet β-cells in diseases such as type 1 diabetes requires therapeutic intervention. The leading strategy for restoration of β-cell mass is through the generation and transplantation of new β-cells derived from human pluripotent stem cells. Other approaches include stimulating endogenous β-cell proliferation, reprogramming non-β-cells to β-like cells, and harvesting islets from genetically engineered animals...
May 2018: Nature
https://www.readbyqxmd.com/read/29764411/contrast-enhanced-ultrasonography-of-the-pancreas-shows-impaired-perfusion-in-pancreas-insufficient-cystic-fibrosis-patients
#2
Trond Engjom, Kim Nylund, Friedemann Erchinger, Marcus Stangeland, Birger Norderud Lærum, Martin Mézl, Radovan Jiřík, Odd Helge Gilja, Georg Dimcevski
BACKGROUND: Perfusion assessment of the pancreas is challenging and poorly evaluated. Pancreatic affection is a prevalent feature of cystic fibrosis (CF). Little is known about pancreatic perfusion in CF. We aimed to assess pancreatic perfusion by contrast-enhanced ultrasound (CEUS) analysed in the bolus-and-burst model and software. METHODS: We performed contrast enhanced ultrasound of the pancreas in 25 CF patients and 20 healthy controls. Perfusion data was analysed using a dedicated perfusion model providing the mean capillary transit-time (MTT), blood flow (BF) and blood-volume (BV)...
May 15, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29746344/nutritional-considerations-in-pediatric-pancreatitis-a-position-paper-from-the-naspghan-pancreas-committee-espghan-pancreas-working-group
#3
Maisam Abu-El-Haija, Aliye Uc, Steven L Werlin, A Jay Freeman, Miglena Georgieva, Danijela Jojkić - Pavkov, Daina Kalnins, Brigitte Kochavi, Bart G P Koot, Stephanie Van Biervliet, Jaroslaw Walkowiak, Michael Wilschanski, Veronique D Morinville
OBJECTIVES: Wide variations exist in how physicians manage the nutritional aspects of children affected by acute pancreatitis (AP), acute recurrent pancreatitis (ARP) and chronic (CP) pancreatitis. Better consensus for optimal management is needed. METHODS: This consensus statement on nutrition in pediatric pancreatic diseases was developed through a joint ESPGHAN-NASPGHAN working group that performed an evidence-based search of the literature on nutrition in AP, ARP, and CP with a focus on pediatrics...
May 8, 2018: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29737796/pancreatic-enzyme-replacement-therapy-pert-in-children-with-persistent-diarrhea-avoidance-of-elemental-diet-need-accessibility-and-costs
#4
Ariani Dewi Widodo, Rianto Setiabudy, Ina S Timan, Saptawati Bardosono, Widdy Winarta, Agus Firmansyah
BACKGROUND AND OBJECTIVES: Persistent diarrhea has been proven to cause pancreatic exocrine insufficiency, due to decreased stimulation to the pancreas caused by prolonged mucosal injury. Pancreatic enzyme replacement therapy (PERT) given in conjunction to regular treatment is thought to be beneficial in replacing this pancreatic enzyme deficiency, avoiding the need of elemental diet. This study aims to evaluate the benefit of PERT in chil-dren with persistent diarrhea. METHODS AND STUDY DESIGN: This is a randomized, two double-blind parallel group, placebo-controlled clinical trial to evaluate the effects of pancreatic enzyme supplementation in persistent diar-rhea...
2018: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29730077/ex-vivo-normothermic-porcine-pancreas-a-physiological-model-for-preservation-and-transplant-study
#5
Rohan Kumar, Wen Yuan Chung, Franscois Runau, John David Isherwood, Kean Guan Kuan, Kevin West, Giuseppe Garcea, Ashley Robert Dennison
INTRODUCTION: An ex vivo normothermic porcine pancreas perfusion (ENPPP) model was established to investigate effects of machine perfusion pressures on graft preservation. METHODOLOGY: Nine porcine pancreata were perfused with autologous blood at 50 mmHg (control) pressure. Graft viability was compared against four ex-vivo porcine pancreata perfused at 20 mmHg ('low') pressure. Arterio-venous oxygen gas differentials, biochemistry, and graft insulin responses to glucose stimulation were compared...
May 3, 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29721633/decreased-vmat2-in-the-pancreas-of-humans-with-type-2-diabetes-mellitus-measured-in-vivo-by-pet-imaging
#6
Gary W Cline, Mika Naganawa, Laigao Chen, Kristin Chidsey, Santos Carvajal-Gonzalez, Sylvester Pawlak, Michelle Rossulek, Yanwei Zhang, Jason Bini, Timothy J McCarthy, Richard E Carson, Roberto A Calle
AIMS/HYPOTHESIS: The progressive loss of beta cell function is part of the natural history of type 2 diabetes. Autopsy studies suggest that this is, in part, due to loss of beta cell mass (BCM), but this has not been confirmed in vivo. Non-invasive methods to quantify BCM may contribute to a better understanding of type 2 diabetes pathophysiology and the development of therapeutic strategies. In humans, the localisation of vesicular monoamine transporter type 2 (VMAT2) in beta cells and pancreatic polypeptide cells, with minimal expression in other exocrine or endocrine pancreatic cells, has led to its development as a measure of BCM...
May 2, 2018: Diabetologia
https://www.readbyqxmd.com/read/29699458/pancreatic-effects-of-a-bruton-s-tyrosine-kinase-small-molecule-inhibitor-in-rats-are-strain-dependent
#7
Manoj Bhaskaran, Paul D Cornwell, Steven D Sorden, Michael R Elwell, Natalie R Russell, Michael L Pritt, John L Vahle
Inhibitors of Bruton's tyrosine kinase (BTK) are under development as potential therapies for various autoimmune diseases. In repeat-dose toxicity studies, small-molecule BTK inhibitors (BTKi) have been reported to cause a constellation of histologic effects at the pancreatic endocrine-exocrine interface in male rats; however, similar findings were not reported in other species. Since the BTKi-induced pancreatic effect is morphologically similar to well-documented spontaneous changes (predominantly characterized by insular/peri-insular hemorrhage, pigment deposition, chronic inflammation, and fibrosis) that are known to vary by rat strain, we investigated potential strain-dependent differences in the pancreatic effects of a small-molecule BTKi, LY3337641...
January 1, 2018: Toxicologic Pathology
https://www.readbyqxmd.com/read/29695287/the-importance-of-endoscopic-ultrasound-fine-needle-aspiration-in-the-diagnosis-of-solid-pseudopapillary-tumor-of-the-pancreas-two-case-reports
#8
Diogo Turiani Hourneaux De Moura, Martin Coronel, Igor Braga Ribeiro, Galileu Ferreira Ayala Farias, Maria Auxiliadora Choez, Rodrigo Rocha, Marcello Pecoraro Toscano, Eduardo Guimarães Hourneaux De Moura
BACKGROUND: Solid pseudopapillary tumor of the pancreas, otherwise known as solid and cystic tumor or Frantz tumor, is an unusual form of pancreatic carcinoma, with unknown etiopathogenesis, that accounts for 0.2 to 2.7% of all pancreatic tumors. It is defined as an exocrine pancreatic neoplasia that mainly affects women between the second and third decade of life, and its management is not well defined. Endoscopic ultrasound offers a key anatomical advantage in accessing the pancreas and endoscopic ultrasound fine-needle aspiration has become the gold standard method for the diagnosis of pancreatic lesions...
April 26, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29687903/na-k-2cl-cotransporter-nkcc-physiological-function-in-nonpolarized-cells-and-transporting-epithelia
#9
Eric Delpire, Kenneth B Gagnon
Two genes encode the Na+ -K+ -2Cl- cotransporters, NKCC1 and NKCC2, that mediate the tightly coupled movement of 1Na+ , 1K+ , and 2Cl- across the plasma membrane of cells. Na+ -K+ -2Cl- cotransport is driven by the chemical gradient of the three ionic species across the membrane, two of them maintained by the action of the Na+ /K+ pump. In many cells, NKCC1 accumulates Cl- above its electrochemical potential equilibrium, thereby facilitating Cl- channel-mediated membrane depolarization. In smooth muscle cells, this depolarization facilitates the opening of voltage-sensitive Ca2+ channels, leading to Ca2+ influx, and cell contraction...
March 25, 2018: Comprehensive Physiology
https://www.readbyqxmd.com/read/29683974/pancreatic-neuroendocrine-tumors-and-intraductal-papillary-mucinous-neoplasm-of-the-pancreas-a-systematic-review
#10
Alba Manuel-Vazquez, José Manuel Ramia, Raquel Latorre-Fragua, Ainhoa Valle-Rubio, Vladimir Arteaga-Peralta, Carmen Ramiro-Pérez, Roberto de la Plaza-Llamas
OBJECTIVES: This study aimed to identify factors that explain the association of intraductal papillary mucinous neoplasms-pancreatic neuroendocrine tumors (IPMNs-PNETs), radiological characteristics, and factors that might guide therapy. METHODS: We performed a systematic review of the literature to search for articles on concurrent IPMN-PNET, mixed endocrine-exocrine pancreatic tumors, and/or PNET with an intraductal growth pattern. RESULTS: A review of the literature suggests that there is some confusion about association of IPMNs-PNETs...
May 2018: Pancreas
https://www.readbyqxmd.com/read/29683972/bladder-versus-enteric-drainage-of-exocrine-secretions-in-pancreas-transplantation-a-retrospective-analysis-of-the-united-network-for-organ-sharing-database
#11
Eric J Siskind, Leo I Amodu, Sonia Pinto, Meredith Akerman, Johann Jonsson, Ernesto P Molmenti, Jorge Ortiz
OBJECTIVES: The method for drainage of exocrine secretions in pancreas transplantation remains a matter of debate. Different methods have evolved over time. Most data on these methods are from single-center studies with small sample sizes. Larger studies have yielded conflicting results. METHODS: Data from the United Network for Organ Sharing database on all adult subjects who received pancreas and kidney-pancreas transplants between 1996 and 2012 were analyzed (n = 19,934)...
May 2018: Pancreas
https://www.readbyqxmd.com/read/29683968/functional-correlation-between-the-pancreas-and-the-small-intestine-in-humans-the-first-evaluation-using-a-newly-developed-enteroscopy
#12
Daijuro Hayashi, Yoshiki Hirooka, Hiroki Kawashima, Eizaburo Ohno, Takuya Ishikawa, Takamichi Kuwahara, Manabu Kawai, Takeshi Yamamura, Kazuhiro Furukawa, Kohei Funasaka, Masanao Nakamura, Ryoji Miyahara, Osamu Watanabe, Masatoshi Ishigami, Senju Hashimoto, Hidemi Goto
OBJECTIVES: The aim of this study is to evaluate a functional correlation between the pancreas and the small intestine and the association of this relationship with nutritional status, using magnifying enteroscopy. METHODS: The subjects were adults aged 20 years or older who underwent upper gastrointestinal endoscopy. An endoscope was inserted into the jejunum, and 10% glucose was sprayed under magnifying observation to evaluate changes in blood flow in the villous capillary network...
April 19, 2018: Pancreas
https://www.readbyqxmd.com/read/29678717/a-tandem-mass-tag-tmt-proteomic-analysis-during-the-early-phase-of-experimental-pancreatitis-reveals-new-insights-in-the-disease-pathogenesis
#13
Violeta García-Hernández, Carmen Sánchez-Bernal, Domitille Schvartz, José J Calvo, Jean-Charles Sanchez, Jesús Sánchez-Yagüe
Changes in the protein expression occurring within the initiation phase of acute pancreatitis (AP) might be vital in the development of this complex disease. However, the exact mechanisms involved in the onset of AP remains elusive and most of our knowledge about the pathobiology of AP comes from animal models. We performed in a rat pancreatitic model a high-throughput shotgun proteomic profiling of the soluble and whole membrane fractions from the pancreas during the early phase of cerulein (Cer)-induced AP...
April 17, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29675407/pancreatic-aquaporin-7-a-novel-target-for-anti-diabetic-drugs
#14
REVIEW
Leire Méndez-Giménez, Silvia Ezquerro, Inês V da Silva, Graça Soveral, Gema Frühbeck, Amaia Rodríguez
Aquaporins comprise a family of 13 members of water channels (AQP0-12) that facilitate a rapid transport of water across cell membranes. In some cases, these pores are also permeated by small solutes, particularly glycerol, urea or nitric oxide, among other solutes. Several aquaporins have been identified in the pancreas, an exocrine and endocrine organ that plays an essential role in the onset of insulin resistance and type 2 diabetes. The exocrine pancreas, which accounts for 90% of the total pancreas, secretes daily large volumes of a near-isotonic fluid containing digestive enzymes into the duodenum...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29675033/identification-and-validation-of-a-diagnostic-and-prognostic-multi-gene-biomarker-panel-for-pancreatic-ductal-adenocarcinoma
#15
Hagen Klett, Hannah Fuellgraf, Ella Levit-Zerdoun, Saskia Hussung, Silke Kowar, Simon Küsters, Peter Bronsert, Martin Werner, Uwe Wittel, Ralph Fritsch, Hauke Busch, Melanie Boerries
Late diagnosis and systemic dissemination essentially contribute to the invariably poor prognosis of pancreatic ductal adenocarcinoma (PDAC). Therefore, the development of diagnostic biomarkers for PDAC are urgently needed to improve patient stratification and outcome in the clinic. By studying the transcriptomes of independent PDAC patient cohorts of tumor and non-tumor tissues, we identified 81 robustly regulated genes, through a novel, generally applicable meta-analysis. Using consensus clustering on co-expression values revealed four distinct clusters with genes originating from exocrine/endocrine pancreas, stromal and tumor cells...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29671537/chronic-pancreatitis-diagnosis-and-treatment
#16
Kathleen Barry
Chronic pancreatitis is an irreversible and progressive disorder of the pancreas characterized by inflammation, fibrosis, and scarring. Exocrine and endocrine functions are lost, often leading to chronic pain. The etiology is multifactorial, although alcoholism is the most significant risk factor in adults. The average age at diagnosis is 35 to 55 years. If chronic pancreatitis is suspected, contrast-enhanced computed tomography is the best imaging modality for diagnosis. Computed tomography may be inconclusive in early stages of the disease, so other modalities such as magnetic resonance imaging, magnetic resonance cholangiopancreatography, or endoscopic ultrasonography with or without biopsy may be used...
March 15, 2018: American Family Physician
https://www.readbyqxmd.com/read/29661440/renopancreatic-transplantation-evaluation-of-15-years-in-131-patients
#17
C G Marmanillo, C Langaro, J E Nicoluzzi, R T Belila, M Macri, R Zamprogna, M Luvizotto, M Takahashi
BACKGROUND: The most common multiple-organ transplant is the simultaneous pancreas-kidney transplantation (SPK). It is usually offered to patients who have insulin-dependent diabetes mellitus and those with diabetic nephropathy and renal failure that has already been established. In this study we present the results of 15 years of SPK in a transplant hospital center in Paraná, Brazil, and evaluated survival, immunosuppression, and transplant-related problems. METHODS: This study was a retrospective analysis of 131 SPK transplants performed at the Angelina Caron Hospital between January 2001 and December 2015...
April 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29659906/increased-chromogranin-a-positive-hormone-negative-cells-in-chronic-pancreatitis
#18
Abu Saleh Md Moin, Megan Cory, Jennifer Choi, Allison Ong, Sangeeta Dhawan, Sarah M Dry, Peter Butler, Robert Rizza, Alexandra Butler
Context: Chronic pancreatitis (CP) is characterized by inflammation, fibrosis and a loss of pancreatic acinar cells which can result in exocrine and eventually endocrine deficiency. Pancreatitis has been reported to induce formation of new endocrine cells (neogenesis) in mice. Our recent data has implicated Chromogranin A-positive hormone negative (CPHN) cells as potential evidence of neogenesis in humans. Objective: We sought to establish if CPHN cells were more abundant in chronic pancreatitis in humans...
April 5, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29589071/distribution-of-il-1%C3%AE-immunoreactive-cells-in-pancreatic-biopsies-from-living-volunteers-with-new-onset-type-1-diabetes-comparison-with-donors-without-diabetes-and-with-longer-duration-of-disease
#19
Shiva Reddy, Lars Krogvold, Charlton Martin, Rebecca Holland, Jaimin Choi, Hannah Woo, Fiona Wu, Knut Dahl-Jørgensen
AIMS/HYPOTHESIS: Although IL-1β is considered a key mediator of beta cell destruction, its cellular expression in islets during early type 1 diabetes remains unclear. We compared its expression in rare pancreatic biopsies from new-onset living volunteers with its expression in cadaveric pancreas sections from non-diabetic autoantibody-positive and -negative individuals and those with long-standing disease. METHODS: Pancreatic biopsy sections from six new-onset living volunteers (group 1) and cadaveric sections from 13 non-diabetic autoantibody-negative donors (group 2), four non-diabetic autoantibody-positive donors (group 3) and nine donors with diabetes of longer duration (0...
March 27, 2018: Diabetologia
https://www.readbyqxmd.com/read/29580319/liver-and-pancreas-do-similar-embryonic-development-and-tissue-organization-lead-to-similar-mechanisms-of-tumorigenesis
#20
Elsa Ghurburrun, Ivan Borbath, Frédéric P Lemaigre, Patrick Jacquemin
Liver and pancreas are closely associated organs which share a common embryological origin. They display amphicrine properties and have similar exocrine organization with parenchymal cells, namely hepatocytes and acinar cells, secreting bile and pancreatic juice into the duodenum via a converging network of bile ducts and pancreatic ducts. Here we compare and highlight the similarities of molecular mechanisms leading to liver and pancreatic cancer development. We suggest that unraveling tumor development in an organ may provide insight into our understanding of carcinogenesis in the other organ...
March 26, 2018: Gene Expression
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