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https://www.readbyqxmd.com/read/28241234/laparoscopic-total-pancreatectomy-with-islet-autotransplantation-and-intraoperative-islet-separation-as-a-treatment-for-patients-with-chronic-pancreatitis
#1
Caleb J Fan, Kenzo Hirose, Christi M Walsh, Michael Quartuccio, Niraj M Desai, Vikesh K Singh, Rita R Kalyani, Daniel S Warren, Zhaoli Sun, Marie N Hanna, Martin A Makary
Importance: Pain management of patients with chronic pancreatitis (CP) can be challenging. Laparoscopy has been associated with markedly reduced postoperative pain but has not been widely applied to total pancreatectomy with islet autotransplantation (TPIAT). Objective: To examine the feasibility of using laparoscopic TPIAT (L-TPIAT) in the treatment of CP. Design, Setting, and Participants: Thirty-two patients with CP presented for TPIAT at a tertiary hospital from January 1, 2013, through December 31, 2015...
February 22, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28230643/mtor-inhibition-clinical-transplantation-pancreas-islet
#2
Thierry Berney, Axel Andres, Christian Toso, Pietro Majno, Jean-Paul Squifflet
This brief overview discusses the beneficial and deleterious effects of mTOR inhibitors on beta-cells, and how sirolimus- and everolimus-based immunosuppression have impacted on practices and outcomes of pancreas and islet transplantation. Sirolimus was the cornerstone of immunosuppressive regimens in islet transplantation at the turn of the millenium, but utilization of mTOR inhibitors has progressively decreased from >80% to <50% of islet transplant recipients in more recent years. For whole pancreas transplantation, mTOR inhibitors were used in approximately 20% of patients in the early 2000s, but this dropped over the years to <10% currently...
February 23, 2017: Transplantation
https://www.readbyqxmd.com/read/28222394/pancreatoprotective-effects-of-geniotrigona-thoracica-stingless-bee-honey-in-streptozotocin-nicotinamide-induced-male-diabetic-rats
#3
Muhammad Shakir Abdul Aziz, Nelli Giribabu, Pasupuleti Visweswara Rao, Naguib Salleh
: Stingless bee honey (SLBH) has been claimed to possess multiple health benefits. Its anti-diabetic properties are however unknown. In this study, ability of SLBH from Geniotrigona thoracica stingless bee species in ameliorating pancreatic damage and in maintaining metabolic profiles were investigated in diabetic condition. METHODS: SLBH at 1 and 2g/kg/b.w. was given orally to streptozotocin (STZ)-nicotinamide-induced male diabetic rats for 28days. Metabolic parameters (fasting blood glucose-FBG and lipid profiles-LP and serum insulin) were measured by biochemical assays...
February 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28222054/ucp2-expression-is-increased-in-pancreas-from-brain-dead-donors-and-involved-in-cytokine-induced-%C3%AE-cells-apoptosis
#4
Leticia A Brondani, Tatiana H Rech, Gabriela Boelter, Andrea C Bauer, Cristiane B Leitão, Décio L Eizirik, Daisy Crispim
BACKGROUND: Systemic inflammation associated with brain death (BD) decreases islet yield and quality, negatively affecting outcomes of human islet transplantation. A recent study from our group showed an increased expression of uncoupling protein-2 (UCP2) in pancreas from rats with BD as compared with controls. UCP2 is located in the mitochondrial inner membrane and regulates production of reactive oxygen species and glucose-stimulated insulin secretion. It has been suggested that UCP2 also plays a role in β cell apoptosis, but these findings remain controversial...
March 2017: Transplantation
https://www.readbyqxmd.com/read/28220294/chromogranin-a-regulates-vesicle-storage-and-mitochondrial-dynamics-to-influence-insulin-secretion
#5
Joshua Wollam, Sumana Mahata, Matthew Riopel, Angelina Hernandez-Carretero, Angshuman Biswas, Gautam K Bandyopadhyay, Nai-Wen Chi, Lee E Eiden, Nitish R Mahapatra, Angelo Corti, Nicholas J G Webster, Sushil K Mahata
Chromogranin A (CgA) is a prohormone and a granulogenic factor that regulates secretory pathways in neuroendocrine tissues. In β-cells of the endocrine pancreas, CgA is a major cargo in insulin secretory vesicles. The impact of CgA deficiency on the formation and exocytosis of insulin vesicles is yet to be investigated. In addition, no literature exists on the impact of CgA on mitochondrial function in β-cells. Using three different antibodies, we demonstrate that CgA is processed to vasostatin- and catestatin-containing fragments in pancreatic islet cells...
February 20, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28201960/hypoglycemia-and-glucocorticoid-free-immunosuppression-are-related-with-low-dehydroepiandrosterone-sulfate-level
#6
Martina Zahradnicka, Frantisek Saudek, Kvetoslav Lipar, Jelena Skibova
BACKGROUND: Low dehydroepiandrosterone sulfate (DHEAS) levels and a high cortisol/DHEAS ratio are associated with higher mortality in elderly, dialyzed, and immunocompromised patients. The role of these hormones in patients with hypoglycemia unawareness (hypo) or in pancreas or islet recipients treated by glucocorticoid-free immunosuppressive regimen (IS) has not been studied. OBJECTIVE: The aim of this study was to determine the effects of IS and of recurrent hypoglycemia on DHEAS and adrenocorticotropic hormone (ACTH) levels in patients with type-1 diabetes (T1DM)...
February 13, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28198575/tat-biliverdin-reductase-a-protects-ins-1-cells-from-human-islet-amyloid-polypeptide-induced-cytotoxicity-by-alleviating-oxidative-stress-and-er-stress
#7
Su Jin Lee, Hyung Kyung Kang, Won Sik Eum, Jinseu Park, Soo Young Choi, Hyeok Yil Kwon
Human islet amyloid polypeptide (hIAPP), a major constituent of islet amyloid deposits, induces pancreatic β-cell apoptosis and eventually contributes to β-cell deficit in patients with type 2 diabetes mellitus (T2DM). In this study, Tat-mediated transduction of biliverdin reductase A (BLVRA) was investigated in INS-1 cells to examine whether exogenous supplementation of BLVRA prevented hIAPP-induced apoptosis and dysfunction in insulin secretion in β-cells. Tat-BLVRA fusion protein was efficiently delivered into INS-1 cells in a time- and dose-dependent manner...
February 15, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28188872/pre-transplantation-31-p-magnetic-resonance-spectroscopy-for-quality-assessment-of-human-pancreatic-grafts-a-feasibility-study
#8
Lina Carlbom, Jan Weis, Lars Johansson, Olle Korsgren, Håkan Ahlström
OBJECTIVE: To investigate the feasibility of using (31)P-MRS for objective non-invasive quality assessment of human pancreas grafts prior to transplantation or islet isolation. MATERIALS AND METHODS: Pancreata from 5 human donors, 3 males and 2 females, aged 49-78years, with body mass index (BMI) 22-31kg/m(2), were included. Pancreata were perfused with histidine-tryptophan-ketoglutarate solution during procurement and stored in hypothermic condition (4°C) for 21-44h...
February 8, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28177704/the-rab-gtpase-activating-protein-tbc1d1-is-critical-for-maintaining-normal-glucose-homeostasis-and-%C3%AE-cell-mass
#9
Sabina Paglialunga, Genevieve Simnett, Holly Robson, Monica Hoang, Renjitha Pillai, Alicia M Arkell, Jeremy A Simpson, Arend Bonen, Mark Huising, Jamie W Joseph, Graham P Holloway
TBC1D1, a Rab-GTPase activating protein, is a paralogue of AS160, and has been implicated in the canonical insulin-signaling cascade in peripheral tissues. More recently, TBC1D1 was identified in rat and human pancreatic islets, however the islet function of TBC1D1 remains not fully understood. We examined the role of TBC1D1 in glucose homeostasis and insulin secretion utilizing a rat knockout (KO) model. Chow-fed TBC1D1 KO rats had improved insulin action but impaired glucose-tolerance test (GTT) and a lower insulin response during an ipGTT compared to WT rats...
January 31, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28174674/the-evaluation-of-islet-purification-methods-that-use-large-bottles-to-create-a-continuous-density-gradient
#10
Chika Miyagi-Shiohira, Naoya Kobayashi, Issei Saitoh, Masami Watanabe, Yasufumi Noguchi, Masayuki Matsushita, Hirofumi Noguchi
Islet purification is one of the most important steps of islet isolation for pancreatic islet transplantation. The most common method of islet purification is density gradient centrifugation using a COBE 2991 cell processor. However, this method can damage islets mechanically through its high shearing force. We recently reported that a new purification method using large plastic bottles effectively achieves a high yield of islets from the porcine pancreas. In the present study, we evaluated the methods of making a continuous density gradient...
January 8, 2017: Cell Medicine
https://www.readbyqxmd.com/read/28163042/munc18b-increases-insulin-granule-fusion-restoring-deficient-insulin-secretion-in-type-2-diabetes-human-and-goto-kakizaki-rat-islets-with-improvement-in-glucose-homeostasis
#11
Tairan Qin, Tao Liang, Dan Zhu, Youhou Kang, Li Xie, Subhankar Dolai, Shuzo Sugita, Noriko Takahashi, Claes-Goran Ostenson, Kate Banks, Herbert Y Gaisano
Reduced pancreatic islet levels of Munc18a/SNARE complex proteins have been postulated to contribute to the deficient glucose-stimulated insulin secretion (GSIS) in type-2 diabetes (T2D). Whereas much previous work has purported Munc18a/SNARE complex (Syntaxin-1A/VAMP-2/SNAP25) to be primarily involved in predocked secretory granule (SG) fusion, less is known about newcomer SGs that undergo minimal docking time at the plasma membrane before fusion. Newcomer SG fusion has been postulated to involve a distinct SM/SNARE complex (Munc18b/Syntaxin-3/VAMP8/SNAP25), whose levels we find also reduced in islets of T2D humans and T2D Goto-Kakizaki (GK) rats...
January 22, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28150744/engineering-an-endocrine-neo-pancreas-by-repopulation-of-a-decellularized-rat-pancreas-with-islets-of-langerhans
#12
H Napierala, K-H Hillebrandt, N Haep, P Tang, M Tintemann, J Gassner, M Noesser, H Everwien, N Seiffert, M Kluge, E Teegen, D Polenz, S Lippert, D Geisel, A Reutzel Selke, N Raschzok, A Andreou, J Pratschke, I M Sauer, B Struecker
Decellularization of pancreata and repopulation of these non-immunogenic matrices with islets and endothelial cells could provide transplantable, endocrine Neo- Pancreata. In this study, rat pancreata were perfusion decellularized and repopulated with intact islets, comparing three perfusion routes (Artery, Portal Vein, Pancreatic Duct). Decellularization effectively removed all cellular components but conserved the pancreas specific extracellular matrix. Digital subtraction angiography of the matrices showed a conserved integrity of the decellularized vascular system but a contrast emersion into the parenchyma via the decellularized pancreatic duct...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28149833/assessment-of-the-link-between-in-utero-exposure-to-2-aminoanthracene-2aa-and-type-1-diabetes-t1d
#13
Christopher A Mays, Daniel A Hunter, Wilson Yau, Worlanyo E Gato
BACKGROUND: A recent diabetes report revealed an increased incidence in diabetes including type 1-diabetes (T1D). The increase in the numbers of T1D incidences are thought to be related to environmental reasons such as the exposure to environmental chemicals including arylamine 2-aminoanthracene (2AA). T1D is an autoimmune disease of the pancreatic islet in which insulin-producing beta cells are destroyed by auto-reactive T-cells and monocytic cells. METHODS: The purpose of this study is to examine the extent to which 2AA exposure contributes to T1D...
2017: Journal of Diabetes and Metabolic Disorders
https://www.readbyqxmd.com/read/28147344/detection-and-localization-of-viral-infection-in-the-pancreas-of-patients-with-type-1-diabetes-using-short-fluorescently-labelled-oligonucleotide-probes
#14
Niels Busse, Federico Paroni, Sarah J Richardson, Jutta E Laiho, Maarit Oikarinen, Gun Frisk, Heikki Hyöty, Eelco de Koning, Noel G Morgan, Kathrin Maedler
Enteroviruses, specifically of the Coxsackie B virus family, have been implicated in triggering islet autoimmunity and type 1 diabetes, but their presence in pancreata of patients with diabetes has not been fully confirmed.To detect the presence of very low copies of the virus genome in tissue samples from T1D patients, we designed a panel of fluorescently labeled oligonucleotide probes, each of 17-22 nucleotides in length with a unique sequence to specifically bind to the enteroviral genome of the picornaviridae family...
29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28146100/echovirus-6-infects-human-exocrine-and-endocrine-pancreatic-cells-and-induces-pro-inflammatory-innate-immune-response
#15
Luis Sarmiento, Gun Frisk, Mahesh Anagandula, Monika Hodik, Ilaria Barchetta, Eitan Netanyah, Eduardo Cabrera-Rode, Corrado M Cilio
Human enteroviruses (HEV), especially coxsackievirus serotype B (CVB) and echovirus (E), have been associated with diseases of both the exocrine and endocrine pancreas, but so far evidence on HEV infection in human pancreas has been reported only in islets and ductal cells. This study aimed to investigate the capability of echovirus strains to infect human exocrine and endocrine pancreatic cells. Infection of explanted human islets and exocrine cells with seven field strains of E6 caused cytopathic effect, virus titer increase and production of HEV protein VP1 in both cell types...
January 30, 2017: Viruses
https://www.readbyqxmd.com/read/28144955/hypothyroidism-in-utero-stimulates-pancreatic-beta-cell-proliferation-and-hyperinsulinaemia-in-the-ovine-fetus-during-late-gestation
#16
Shelley E Harris, Miles J De Blasio, Melissa A Davis, Amy C Kelly, Hailey M Davenport, F B Peter Wooding, Dominique Blache, David Meredith, Miranda Anderson, Abigail L Fowden, Sean W Limesand, Alison J Forhead
Development of pancreatic beta cell mass before birth is essential for normal growth of the fetus and for long-term control of carbohydrate metabolism in postnatal life. Thyroid hormones are also important regulators of fetal growth, and the present study tested the hypotheses that thyroid hormones promote beta cell proliferation in the fetal ovine pancreatic islets, and that growth retardation in hypothyroid fetal sheep is associated with reductions in pancreatic beta cell mass and circulating insulin concentration in utero...
January 31, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28144593/gsm-900-mhz-microwave-radiation-induced-alterations-of-insulin-level-and-histopathological-changes-of-liver-and-pancreas-in-rat
#17
S M J Mortazavi, S M Owji, M B Shojaei-Fard, M Ghader-Panah, S A R Mortazavi, A Tavakoli-Golpayegani, M Haghani, S Taeb, N Shokrpour, O Koohi
BACKGROUND: The rapidly increasing use of mobile phones has led to public concerns about possible health effects of these popular communication devices. This study is an attempt to investigate the effects of radiofrequency (RF) radiation produced by GSM mobile phones on the insulin release in rats. METHODS: Forty two female adult Sprague Dawley rats were randomly divided into 4 groups. Group1 were exposed to RF radiation 6 hours per day for 7 days. Group 2 received sham exposure (6 hours per day for 7 days)...
December 2016: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/28137793/increase-in-pancreatic-proinsulin-and-preservation-of-beta-cell-mass-in-autoantibody-positive-donors-prior-to-type-1-diabetes-onset
#18
Teresa Rodriguez-Calvo, Jose Zapardiel-Gonzalo, Natalie Amirian, Ericka Castillo, Yasaman Lajevardi, Lars Krogvold, Knut Dahl-Jørgensen, Matthias G von Herrath
Type 1 diabetes is characterized by the loss of insulin production due to beta cell dysfunction and/or destruction. The hypothesis that beta cell loss occurs early during the pre-diabetic phase has recently been challenged. Here we show, for the first time in situ that in pancreas sections from autoantibody positive donors (Ab+) insulin area and beta cell mass are maintained prior to disease onset, and that production of proinsulin increases. This suggests that beta cell destruction occurs more precipitously than previously assumed...
January 30, 2017: Diabetes
https://www.readbyqxmd.com/read/28135283/the-spleen-is-an-ideal-site-for-inducing-transplanted-islet-graft-expansion-in-mice
#19
Takeshi Itoh, Hitomi Nishinakamura, Kenjiro Kumano, Hiroyuki Takahashi, Shohta Kodama
Alternative islet transplantation sites have the potential to reduce the marginal number of islets required to ameliorate hyperglycemia in recipients with diabetes. Previously, we reported that T cell leukemia homeobox 1 (Tlx1)+ stem cells in the spleen effectively regenerated into insulin-producing cells in the pancreas of non-obese diabetic mice with end-stage disease. Thus, we investigated the spleen as a potential alternative islet transplantation site. Streptozotocin-induced diabetic C57BL/6 mice received syngeneic islets into the portal vein (PV), beneath the kidney capsule (KC), or into the spleen (SP)...
2017: PloS One
https://www.readbyqxmd.com/read/28133198/-a-case-of-pancreatic-metastasis-of-osteosarcoma-resected-using-laparoscopic-spleen-preserving-distal-pancreatectomy
#20
Hirochika Toyama, Sadaki Asari, Tadahiro Goto, Sachio Terai, Sachiyo Shirakawa, Yoshihide Nanno, Takuya Mizumoto, Takumi Fukumoto, Tetsuo Ajiki, Masahiro Kido, Motofumi Tanaka, Taku Matsumoto, Hisoka Kinoshita, Kaori Kuramitsu, Yonson Ku
A 44-year-old woman underwent surgical resection and received preoperative and postoperative chemotherapy for conventional osteosarcoma in the right fibular head. Three years later, follow-up PET-CT revealed accumulation ofFDG in the tail ofthe pancreas. Contrast-enhanced computed tomography showed a 13mm well-circumscribed hypovascular tumor. EUS showed a heterogeneous solid tumor, which was diagnosed as metastasis ofosteosarcoma to the pancreas. Laparoscopic spleen preserving distal pancreatectomy(LAP-SPDP)was performed...
November 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
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