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Exocrine pancreas

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https://www.readbyqxmd.com/read/28922171/pancreatic-polypeptide-in-parkinson-s-disease-a-potential-marker-of-parasympathetic-denervation
#1
Karoline Knudsen, Bolette Hartmann, Tatyana D Fedorova, Karen Østergaard, Klaus Krogh, Niels Møller, Jens J Holst, Per Borghammer
BACKGROUND AND OBJECTIVES: Parkinson's disease (PD) patients experience several non-motor symptoms from the gastrointestinal tract that may partly be caused by parasympathetic deficiency. The pancreas is densely innervated by the vagus nerve, which mediates early meal-induced secretion of pancreatic polypeptide (PP). Early secretion after sham feeding has been validated as a marker of vagal integrity. Thus, the aim was to evaluate the ratio of increased PP plasma levels after sham feeding in PD and correlate findings with gastrointestinal transit time (GITT)...
September 11, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28921917/changes-on-the-pancreas-in-experimental-diabetes-and-the-effect-of-lycopene-on-these-changes-pdx-1-ngn-3-and-nestin-expressions
#2
Mustafa Sandıkcı, Levent Karagenc, Mustafa Yıldız
The aim of the present study was to investigate changes occurring in the number of beta cells, as well as the expressions of Ngn-3, nestin and Pdx-1 of pancreatic progenitor cells in the pancreas of experimentally-induced adult diabetic rats and to determine the effect of orally-administered lycopene on these changes. Following the administration of 50 mg/kg streptozotocin to rats, four groups of animals were established: control+corn oil, control+lycopene, diabetic+corn oil and diabetic+lycopene. The animals in the control+lycopene and diabetic+lycopene groups received 4 mg/kg lycopene for a period of four weeks...
September 16, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28902792/paracrine-secretion-of-transforming-growth-factor-%C3%AE-by-ductal-cells-promotes-acinar-to-ductal-metaplasia-in-cultured-human-exocrine-pancreas-tissues
#3
Naoki Akanuma, Jun Liu, Geou-Yarh Liou, Xue Yin, Kaitlyn R Bejar, Chengyang Liu, Lu-Zhe Sun, Peter Storz, Pei Wang
OBJECTIVE: We aimed to evaluate the contribution of acinar-to-ductal metaplasia (ADM) to the accumulation of cells with a ductal phenotype in cultured human exocrine pancreatic tissues and reveal the underlying mechanism. METHODS: We sorted and cultured viable cell populations in human exocrine pancreatic tissues with a flow cytometry-based lineage tracing method to evaluate possible mechanisms of ADM. Cell surface markers, gene expression pattern, and sphere formation assay were used to examine ADM...
October 2017: Pancreas
https://www.readbyqxmd.com/read/28898113/interferon-regulatory-factor-6-is-necessary-for-salivary-glands-and-pancreas-development
#4
K A Metwalli, M A Do, K Nguyen, S Mallick, K Kin, N Farokhnia, G Jun, W D Fakhouri
Interferon regulatory factor 6 ( IRF6) acts as a tumor suppressor and controls cell differentiation in ectodermal and craniofacial tissues by regulating expression of target genes. Haploinsufficiency of IRF6 causes Van der Woude and popliteal pterygium syndrome, 2 syndromic forms of cleft lip and palate. Around 85% of patients with Van der Woude express pits on the lower lip that continuously or intermittently drain saliva, and patients with the common cleft lip and palate have a higher prevalence of dental caries and gingivitis...
September 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28894791/pancreas-transplantation-with-portal-enteric-drainage-for-patients-with-endocrine-and-exocrine-insufficiency-from-extensive-pancreatic-resection
#5
Andrew S Barbas, David P Al-Adra, Nicolas Goldaracena, Martin J Dib, Markus Selzner, Gonzalo Sapisochin, Mark S Cattral, Ian D McGilvray
Although the primary indication for pancreas transplantation is type I diabetes, a small number of patients requires pancreas transplantation to manage combined endocrine and exocrine insufficiency that develops after extensive native pancreatic resection. The objective of this case report was to describe the operative and clinical course in 3 such patients and present an alternative technical approach.
September 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28891030/species-differences-in-pancreatic-binding-of-do3a-vs-cys-40-exendin4
#6
Olof Eriksson, Ulrika Rosenström, Ram K Selvaraju, Barbro Eriksson, Irina Velikyan
AIMS: Radiolabeled Exendin-4 has been proposed as suitable imaging marker for pancreatic beta cell mass quantification mediated by Glucagon-like peptide-1 receptor (GLP-1R). However, noticeable species variations in basal pancreatic uptake as well as uptake reduction degree due to selective beta cell ablation were observed. METHODS: In vitro and ex vivo autoradiography studies of pancreas were performed using [(177)Lu]Lu-DO3A-VS-Cys(40)-Exendin4, in order to investigate the mechanism of uptake as well as the islet uptake contrast in mouse, rat, pig, and non-human primate...
September 11, 2017: Acta Diabetologica
https://www.readbyqxmd.com/read/28886391/combined-pancreatic-and-duodenal-transection-injury-a-case-report
#7
Simbarashe Gift Mungazi, Chenesa Mbanje, Onesai Chihaka, Noah Madziva
INTRODUCTION: Combined pancreatic-duodenal injuries in blunt abdominal trauma are rare. These injuries are associated with high morbidity and mortality, and their emergent management is a challenge. CASE PRESENTATION: We report a case of combined complete pancreatic (through the neck) and duodenal (first part) transections in a 24-year-old male secondary to blunt abdominal trauma following a motor vehicle crash. The duodenal stumps were closed separately and a gastrojejunostomy performed for intestinal continuity...
August 31, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28880010/chronic-pancreatitis
#8
REVIEW
Jorg Kleeff, David C Whitcomb, Tooru Shimosegawa, Irene Esposito, Markus M Lerch, Thomas Gress, Julia Mayerle, Asbjørn Mohr Drewes, Vinciane Rebours, Fatih Akisik, J Enrique Domínguez Muñoz, John P Neoptolemos
Chronic pancreatitis is defined as a pathological fibro-inflammatory syndrome of the pancreas in individuals with genetic, environmental and/or other risk factors who develop persistent pathological responses to parenchymal injury or stress. Potential causes can include toxic factors (such as alcohol or smoking), metabolic abnormalities, idiopathic mechanisms, genetics, autoimmune responses and obstructive mechanisms. The pathophysiology of chronic pancreatitis is fairly complex and includes acinar cell injury, acinar stress responses, duct dysfunction, persistent or altered inflammation, and/or neuro-immune crosstalk, but these mechanisms are not completely understood...
September 7, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28878130/an-ancestral-retroviral-protein-identified-as-a-therapeutic-target-in-type-1-diabetes
#9
Sandrine Levet, Julie Medina, Julie Joanou, Amandine Demolder, Nelly Queruel, Kevin Réant, Matthieu Normand, Marine Seffals, Julie Dimier, Raphaële Germi, Thomas Piofczyk, Jacques Portoukalian, Jean-Louis Touraine, Hervé Perron
Human endogenous retroviruses (HERVs), remnants of ancestral viral genomic insertions, are known to represent 8% of the human genome and are associated with several pathologies. In particular, the envelope protein of HERV-W family (HERV-W-Env) has been involved in multiple sclerosis pathogenesis. Investigations to detect HERV-W-Env in a few other autoimmune diseases were negative, except in type-1 diabetes (T1D). In patients suffering from T1D, HERV-W-Env protein was detected in 70% of sera, and its corresponding RNA was detected in 57% of peripheral blood mononuclear cells...
September 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/28860126/incidence-demographics-and-clinical-characteristics-of-diabetes-of-the-exocrine-pancreas-type-3c-a-retrospective-cohort-study
#10
Chris Woodmansey, Andrew P McGovern, Katherine A McCullough, Martin B Whyte, Neil M Munro, Ana C Correa, Piers A C Gatenby, Simon A Jones, Simon de Lusignan
OBJECTIVE: This study was conducted to describe the incidence of diabetes following pancreatic disease, assess how these patients are classified by clinicians, and compare clinical characteristics with type 1 and type 2 diabetes. RESEARCH DESIGN AND METHODS: Primary care records in England (n = 2,360,631) were searched for incident cases of adult-onset diabetes between 1 January 2005 and 31 March 2016. We examined demographics, diabetes classification, glycemic control, and insulin use in those with and without pancreatic disease (subcategorized into acute pancreatitis or chronic pancreatic disease) before diabetes diagnosis...
August 31, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28851992/tcf7l2-plays-pleiotropic-roles-in-the-control-of-glucose-homeostasis-pancreas-morphology-vascularization-and-regeneration
#11
Nicola Facchinello, Estefania Tarifeño-Saldivia, Enrico Grisan, Marco Schiavone, Margherita Peron, Alessandro Mongera, Olivier Ek, Nicole Schmitner, Dirk Meyer, Bernard Peers, Natascia Tiso, Francesco Argenton
Type 2 diabetes (T2D) is a disease characterized by impaired insulin secretion. The Wnt signaling transcription factor Tcf7l2 is to date the T2D-associated gene with the largest effect on disease susceptibility. However, the mechanisms by which TCF7L2 variants affect insulin release from β-cells are not yet fully understood. By taking advantage of a tcf7l2 zebrafish mutant line, we first show that these animals are characterized by hyperglycemia and impaired islet development. Moreover, we demonstrate that the zebrafish tcf7l2 gene is highly expressed in the exocrine pancreas, suggesting potential bystander effects on β-cell growth, differentiation and regeneration...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28836100/iron-a-strong-element-in-the-pathogenesis-of-chronic-hyperglycaemia-after-acute-pancreatitis
#12
Shayal K Chand, Ruma G Singh, Sayali A Pendharkar, Maxim S Petrov
Evidence shows an association between markers of iron metabolism and glucose metabolism in type 2 diabetes mellitus. Acute pancreatitis is the largest contributor to diabetes of the exocrine pancreas. However, the pathogenesis of new-onset pre-diabetes or diabetes after pancreatitis remains unclear. This study aimed to investigate associations between markers of iron metabolism and glucose metabolism following acute pancreatitis. Fasting blood samples were collected to analyse markers of glucose metabolism (haemoglobin A1c) and iron metabolism (hepcidin, ferritin, and soluble transferrin receptor)...
August 23, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28814218/diagnosis-and-management-of-pancreatic-exocrine-insufficiency
#13
Mehrdad Nikfarjam, Jeremy S Wilson, Ross C Smith
In 2015, the Australasian Pancreatic Club (APC) published the Australasian guidelines for the management of pancreatic exocrine insufficiency (http://pancreas.org.au/2016/01/pancreatic-exocrine-insufficiency-guidelines). Pancreatic exocrine insufficiency (PEI) occurs when normal digestion cannot be sustained due to insufficient pancreatic digestive enzyme activity. This may be related to a breakdown, at any point, in the pancreatic digestive chain: pancreatic stimulation; synthesis, release or transportation of pancreatic enzymes; or synchronisation of secretions to mix with ingested food...
August 21, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28811674/regenerative-medicine-and-cell-based-approaches-to-restore-pancreatic-function
#14
REVIEW
Cara Ellis, Adam Ramzy, Timothy J Kieffer
The pancreas is a complex organ with exocrine and endocrine components. Many pathologies impair exocrine function, including chronic pancreatitis, cystic fibrosis and pancreatic ductal adenocarcinoma. Conversely, when the endocrine pancreas fails to secrete sufficient insulin, patients develop diabetes mellitus. Pathology in either the endocrine or exocrine pancreas results in devastating economic and personal consequences. The current standard therapy for treating patients with type 1 diabetes mellitus is daily exogenous insulin injections, but cell sources of insulin provide superior glycaemic regulation and research is now focused on the goal of regenerating or replacing β cells...
August 16, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28811309/cellular-and-molecular-mechanisms-coordinating-pancreas-development
#15
REVIEW
Aimée Bastidas-Ponce, Katharina Scheibner, Heiko Lickert, Mostafa Bakhti
The pancreas is an endoderm-derived glandular organ that participates in the regulation of systemic glucose metabolism and food digestion through the function of its endocrine and exocrine compartments, respectively. While intensive research has explored the signaling pathways and transcriptional programs that govern pancreas development, much remains to be discovered regarding the cellular processes that orchestrate pancreas morphogenesis. Here, we discuss the developmental mechanisms and principles that are known to underlie pancreas development, from induction and lineage formation to morphogenesis and organogenesis...
August 15, 2017: Development
https://www.readbyqxmd.com/read/28809096/pancreatico-jejunostomy-decreases-post-operative-pancreatic-fistula-incidence-and-severity-after-central-pancreatectomy
#16
Frédéric Borel, Mehdi Ouaissi, Aude Merdrignac, Aurelien Venara, Valéria De Franco, Laurent Sulpice, Antoine Hamy, Nicolas Regenet
BACKGROUNDS: Central pancreatectomy (CP) is an alternative to pancreaticoduodenectomy and distal pancreatectomy in benign tumours of pancreatic isthmus management. It is known for a high post-operative pancreatic fistula (POPF) rate. The purpose of this study was to compare POPF incidence between pancreatico-jejunostomy (PJ) and pancreatico-gastrostomy (PG). METHODS: Fifty-eight patients (mean age 53.9 ± 1.9 years) who underwent a CP in four French University Hospitals from 1988 to 2011 were analysed...
August 15, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28798951/histomorphological-description-of-the-digestive-system-of-pebbly-fish-alestes-baremoze-joannis-1835
#17
Nasser Kasozi, Gerald Iwe Degu, Julius Mukalazi, Charles Drago Kato, Majid Kisekka, Akisoferi Owori Wadunde, Godfrey Kityo, Victoria Tibenda Namulawa
Histomorphological studies of the digestive system of Alestes baremoze captured from Lake Albert, Uganda, were done using standard procedures. These revealed that A. baremoze has a fleshy-lipped terminal small mouth, large molar, short oesophagus, a three-lobed liver, pouch-like stomach, a nine-fingered caeca, and a long tubular intestine. A stratified squamous epithelium with numerous mucus-secreting cells lined the lips with no taste buds. Stratified squamous epithelia lined the oesophagus in the anterior portion which turned into a columnar epithelium towards the stomach...
2017: TheScientificWorldJournal
https://www.readbyqxmd.com/read/28765528/pdx1-cre-driven-conditional-gene-depletion-suggests-pak4-as-dispensable-for-mouse-pancreas-development
#18
Miao Zhao, Parisa Rabieifar, Tânia D F Costa, Ting Zhuang, Audrey Minden, Matthias Löhr, Rainer Heuchel, Staffan Strömblad
Constitutive depletion of p21-activated kinase 4 (PAK4) in the mouse causes embryonic lethality associated with heart and brain defects. Given that conventional gene depletion of PAK1 or PAK3 caused functional deficits in the mouse pancreas, while gene depletion of PAK5 or PAK6 did not, we asked if PAK4 might have a functional role in pancreas development. We therefore introduced conditional, Pdx1-Cre-mediated, pancreatic PAK4 gene depletion in the mouse, verified by loss of PAK4 protein expression in the pancreas...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28748103/role-of-ghrelin-in-the-pancreatic-exocrine-secretion-via-mitogen-activated-protein-kinase-signaling-in-rats
#19
Kyung-Hoon Lee, Jae-Sung Lee, Tao Wang, Jin-Ju Oh, Sanggun Roh, Hong-Gu Lee
BACKGROUND: This study was performed to investigate the impact of exogenous ghrelin on the pancreatic α-amylase outputs and responses of pancreatic proteins to ghrelin that may relate to pancreatic exocrine. METHODS: Sprague-Dawley male rats (9 weeks old, 300 ± 10 g) were injected with ghrelin via intraperitoneal (i.p.) infusion at dosage of 0, 0.1, 1.0 and 10.0 μg/kg body weight (BW), respectively. The plasma ghrelin and cholecystokinin (CCK) level were determined using enzyme immunoassay kit; the mRNA expression of ghrelin receptor (GHSR-1α) and growth hormone (GH) receptor were assessed by reverse transcription PCR; the expressions of pancreatic α-amylase activity, extracellular-signal-regulated kinases (ERK), phosphorylated extracellular-signal-regulated kinases (pERK) and c-Jun N-terminal kinase (JNK) were evaluated by western blotting; moreover the responses of pancreatic proteins to ghrelin were analyzed using the two-dimensional gel electrophoresis system...
2017: Journal of Animal Science and Technology
https://www.readbyqxmd.com/read/28741615/patient-and-disease-characteristics-associated-with-the-presence-of-diabetes-mellitus-in-adults-with-chronic-pancreatitis-in-the-united-states
#20
Melena D Bellin, David C Whitcomb, Judah Abberbock, Stuart Sherman, Bimaljit S Sandhu, Timothy B Gardner, Michelle A Anderson, Michele D Lewis, Samer Alkaade, Vikesh K Singh, John Baillie, Peter A Banks, Darwin Conwell, Gregory A Cote, Nalini M Guda, Thiruvengadam Muniraj, Gong Tang, Randall E Brand, Andres Gelrud, Stephen T Amann, Christopher E Forsmark, C Mel Wilcox, Adam Slivka, Dhiraj Yadav
OBJECTIVES: Diabetes mellitus (DM) is a common complication of chronic pancreatitis (CP). Past studies for DM risk factors in CP have been limited to single centers or highly focused on a single etiology such as alcoholic or hereditary disease. We studied risk factors for DM in a large population of patients with CP of all etiologies enrolled in the North American Pancreatitis 2 studies. METHODS: Participants (1,171) with CP (n=383 with DM, n=788 without DM) were enrolled prospectively from 26 participating centers...
September 2017: American Journal of Gastroenterology
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