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https://www.readbyqxmd.com/read/28078385/glucose-and-fatty-acids-synergistically-and-reversibly-promote-beta-cell-proliferation-in-rats
#1
Valentine S Moullé, Kevin Vivot, Caroline Tremblay, Bader Zarrouki, Julien Ghislain, Vincent Poitout
AIMS/HYPOTHESIS: The mechanisms underlying pancreatic islet mass expansion have attracted considerable interest as potential therapeutic targets to prevent or delay the onset of type 2 diabetes. While several factors promoting beta cell proliferation have been identified, in the context of nutrient excess the roles of glucose or NEFA in relation to insulin resistance remain unclear. Here we tested the hypothesis that glucose and NEFA synergistically and reversibly promote beta cell proliferation in the context of nutrient-induced insulin resistance...
January 11, 2017: Diabetologia
https://www.readbyqxmd.com/read/28072777/pancreatic-islets-find-a-new-transplant-home-in-the-omentum
#2
Charles Schmidt
No abstract text is available yet for this article.
January 10, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28060183/gemcitabine-enhances-kras-mek-induced-matrix-metalloproteinase-10-expression-via-histone-acetylation-in-gemcitabine-resistant-pancreatic-tumor-initiating-cells
#3
Kazuya Shimizu, Takaaki Nishiyama, Yuichi Hori
OBJECTIVES: Advanced pancreatic ductal adenocarcinoma is resistant to systemic chemotherapy, resulting in a poor prognosis. We previously isolated a human pancreatic tumor-initiating cell line, KMC07, from a patient with acquired resistance to gemcitabine chemotherapy. To improve the anticancer effects of gemcitabine, we investigated the molecular mechanism of KMC07 cells' resistance to gemcitabine. METHODS: KMC07 cells were treated with gemcitabine, then gene expression and functional analyses performed using microarray, the quantitative polymerase chain reaction, immunoblotting, immunohistochemistry, chromatin immunoprecipitation, and cell transplantation into nude mice...
February 2017: Pancreas
https://www.readbyqxmd.com/read/28049286/is-islet-transplantation-a-realistic-approach-to-curing-diabetes
#4
REVIEW
Sang-Man Jin, Kwang-Won Kim
Since the report of type 1 diabetes reversal in seven consecutive patients by the Edmonton protocol in 2000, pancreatic islet transplantation has been reappraised based on accumulated clinical evidence. Although initially expected to therapeutically target long-term insulin independence, islet transplantation is now indicated for more specific clinical benefits. With the long-awaited report of the first phase 3 clinical trial in 2016, allogeneic islet transplantation is now transitioning from an experimental to a proven therapy for type 1 diabetes with problematic hypoglycemia...
January 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/27999871/loss-of-prohormone-convertase-2-promotes-beta-cell-dysfunction-in-a-rodent-transplant-model-expressing-human-pro-islet-amyloid-polypeptide
#5
Jaques A Courtade, Evan Y Wang, Paul Yen, Derek L Dai, Galina Soukhatcheva, Paul C Orban, C Bruce Verchere
AIMS/HYPOTHESIS: A contributor to beta cell failure in type 2 diabetes and islet transplants is amyloid formation by aggregation of the beta cell peptide, islet amyloid polypeptide (IAPP). Similar to the proinsulin processing pathway that generates insulin, IAPP is derived from a prohormone precursor, proIAPP, which requires cleavage by prohormone convertase (PC) 1/3 and PC2 in rodent pancreatic beta cells. We hypothesised that loss of PC2 would promote beta cell death and dysfunction in a rodent model of human beta cell proIAPP overexpression...
December 20, 2016: Diabetologia
https://www.readbyqxmd.com/read/27995762/encapsulation-of-insulin-secreting-cells-expressing-a-genetically-encoded-fluorescent-calcium-indicator-for-cell-based-sensing-in-vivo
#6
Christophe Boss, Umberto De Marchi, Aurélie Hermant, Mouna Conrad, Federico Sizzano, Alessio Palini, Andreas Wiederkehr, Nicolas Bouche
The development of cell-based biosensors that give insight into cell and tissue function in vivo is an attractive technology for biomedical research. Here, the development of a cell line expressing a fluorescent calcium sensor for the study of beta-cell function in vivo is reported. The bioresponsive cell model is based on INS-1E pancreatic beta-cells, stably expressing the genetically encoded cameleon-based fluorescent sensor YC3.6cyto . Following single-cell selection and expansion, functional testing and in vitro encapsulation experiments are used to identify a suitable clone of INS-1E cells expressing the calcium sensor...
December 20, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27994337/management-of-graft-duodenal-leak-in-simultaneous-pancreas-kidney-transplant-a-case-report-from-india-and-review-of-literature
#7
REVIEW
Sunil Kumar, Sarbpreet Singh, Deepesh Benjamin Kenwar, Manish Rathi, Sanjay Bhadada, Ashish Sharma, Vikas Gupta, Anil Bhansali, Anupam Lal, Mukut Minz
Pancreatic transplantation is currently the only effective cure for Type 1 diabetes mellitus. It allows long-term glycemic control without exogenous insulin and amelioration of secondary diabetic complications. In India, pancreas transplant has not yet established with only a single successful transplant reported so far in the literature. We report a 24-year-old Type 1 diabetic patient with renal failure who underwent a simultaneous pancreas kidney transplant. On postoperative day 15, he had leak from the graft duodenal stump for which a tube duodenostomy and proximal diversion enterostomy was done...
October 2016: Indian Journal of Surgery
https://www.readbyqxmd.com/read/27988354/the-anti-tumor-effects-of-the-recombinant-toxin-protein-rlj-rgd3-from-lampetra-japonica-on-pancreatic-carcinoma-panc-1-cells-in-nude-mice
#8
Yue Wang, Yuanyuan Zheng, Zuoyu Tu, Yongguo Dai, Hong Xu, Li Lv, Jihong Wang
Recombinant Lampetra japonica RGD peptide (rLj-RGD3) is a soluble toxin protein with three RGD (Arg-Gly-Asp) motifs and a molecular weight of 13.5kDa. The aim of this study was to investigate the effects and mechanisms of rLj-RGD3 on tumor growth and survival in pancreatic carcinoma Panc-1 cell-bearing mice. A Panc-1 human pancreatic carcinoma-bearing nude mouse model was successfully generated, and the animals were treated with different doses of rLj-RGD3 for 3 weeks. The volume and weight of the subcutaneous tumors, the survival of the nude mice, histopathological changes, the intratumoral MVD, the number of apoptotic Panc-1 cells, and apoptosis-related proteins and gene expressions were determined...
December 14, 2016: Peptides
https://www.readbyqxmd.com/read/27982034/a-tlr9-agonist-promotes-il-22-dependent-pancreatic-islet-allograft-survival-in-type-1-diabetic-mice
#9
Deepak Tripathi, Sambasivan Venkatasubramanian, Satyanarayana S Cheekatla, Padmaja Paidipally, Elwyn Welch, Amy R Tvinnereim, Ramakrishna Vankayalapati
Pancreatic islet transplantation is a promising potential cure for type 1 diabetes (T1D). Islet allografts can survive long term in the liver parenchyma. Here we show that liver NK1.1(+) cells induce allograft tolerance in a T1D mouse model. The tolerogenic effects of NK1.1(+) cells are mediated through IL-22 production, which enhances allograft survival and increases insulin secretion. Increased expression of NKG2A by liver NK1.1(+) cells in islet allograft-transplanted mice is involved in the production of IL-22 and in the reduced inflammatory response to allografts...
December 16, 2016: Nature Communications
https://www.readbyqxmd.com/read/27974246/micrornas-106b-and-222-improve-hyperglycemia-in-a-mouse-model-of-insulin-deficient-diabetes-via-pancreatic-%C3%AE-cell-proliferation
#10
Sohei Tsukita, Tetsuya Yamada, Kei Takahashi, Yuichiro Munakata, Shinichiro Hosaka, Hironobu Takahashi, Junhong Gao, Yuta Shirai, Shinjiro Kodama, Yoichiro Asai, Takashi Sugisawa, Yumiko Chiba, Keizo Kaneko, Kenji Uno, Shojiro Sawada, Junta Imai, Hideki Katagiri
Major symptoms of diabetes mellitus manifest, once pancreatic β-cell numbers have become inadequate. Although natural regeneration of β-cells after injury is very limited, bone marrow (BM) transplantation (BMT) promotes their regeneration through undetermined mechanism(s) involving inter-cellular (BM cell-to-β-cell) crosstalk. We found that two microRNAs (miRNAs) contribute to BMT-induced β-cell regeneration. Screening murine miRNAs in serum exosomes after BMT revealed 42 miRNAs to be increased. Two of these miRNAs (miR-106b-5p and miR-222-3p) were shown to be secreted by BM cells and increased in pancreatic islet cells after BMT...
December 7, 2016: EBioMedicine
https://www.readbyqxmd.com/read/27956625/clarifying-intact-3d-tissues-on-a-microfluidic-chip-for-high-throughput-structural-analysis
#11
Yih Yang Chen, Pamuditha N Silva, Abdullah Muhammed Syed, Shrey Sindhwani, Jonathan V Rocheleau, Warren C W Chan
On-chip imaging of intact three-dimensional tissues within microfluidic devices is fundamentally hindered by intratissue optical scattering, which impedes their use as tissue models for high-throughput screening assays. Here, we engineered a microfluidic system that preserves and converts tissues into optically transparent structures in less than 1 d, which is 20× faster than current passive clearing approaches. Accelerated clearing was achieved because the microfluidic system enhanced the exchange of interstitial fluids by 567-fold, which increased the rate of removal of optically scattering lipid molecules from the cross-linked tissue...
December 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27941931/in-vivo-functional-dissection-of-a-context-dependent-role-for-hif1%C3%AE-in-pancreatic-tumorigenesis
#12
T Cheng, Z Jian, K Li, S Raulefs, I Regel, S Shen, X Zou, J Ruland, G O Ceyhan, H Friess, C W Michalski, J Kleeff, B Kong
Hypoxia-inducible factor 1α (Hif1α) is a key regulator of cellular adaptation and survival under hypoxic conditions. In pancreatic ductal adenocarcinoma (PDAC), it has been recently shown that genetic ablation of Hif1α accelerates tumour development by promoting tumour-supportive inflammation in mice, questioning its role as the key downstream target of many oncogenic signals of PDAC. Likely, Hif1α has a context-dependent role in pancreatic tumorigenesis. To further analyse this, murine PDAC cell lines with reduced Hif1α expression were generated using shRNA transfection...
December 12, 2016: Oncogenesis
https://www.readbyqxmd.com/read/27938471/human-recombinant-antithrombin-atrynsup-sup-administration-improves-survival-and-prevents-intravascular-coagulation-after-intraportal-islet-transplantation-in-a-piglet-model
#13
Valery Gmyr, Caroline Bonner, Ericka Moerman, Antoine Tournoys, Nathalie Delalleau, Audrey Quenon, Julien Thevenet, Mikael Chetboun, Julie KerrConte, Franois Pattou, Thomas Hubert, Merce Jourdain
Human islet transplantation is a viable treatment option for type 1 diabetes mellitus (T1D). However, pancreatic isletinflammation after transplantation induced by innate immune responses is likely to hinder graft function. This is mediated by incompatibility between islets and the blood interface, known as instant blood-mediated inflammatory reaction (IBMIR). Herein, we hypothesized that portal venous administration of islet cells with human recombinant antithrombin (ATryn(®)), a serine protease inhibitor (serpin), which plays a central role in the physiological regulation of coagulation and exerts indirect anti-inflammatory activities may offset coagulation abnormalities such as Disseminated Intravascular Coagulation (DIC) and IBMIR...
27, 2016: Cell Transplantation
https://www.readbyqxmd.com/read/27936486/microrna-4656-is-a-prognostic-factor-and-tumor-suppressor-in-human-pancreatic-through-downstream-tareget-of-trka
#14
Xianglong Tan, Jinyong Lv, Guodong Zhao, Zhiming Zhao, Chenggang Li, Yong Xu, Minggen Hu
BACKGROUND: In this study, we investigated the expression profile and functional mechanism of microRNA-4656 in human pancreatic cancer (PC). METHODS: MiR-4656 expression in PC tumors was examined by qRT-PCR in 134 patients. Associations between tumorous miR-4656 expression and patient's clinicopathological parameters and overall survival were analyzed. MiR-4656 expression was also examined in PC in vitro cell lines. In Capan-1 and AsPC-1 PC cells, lentivirus-induced miR-4656 overexpression or downregulation was applied to investigate its functional regulations on PC in vitro proliferation and invasion, and in vivo transplant growth...
December 9, 2016: Journal of Gene Medicine
https://www.readbyqxmd.com/read/27932185/inferior-vena-cava-duodenal-drainage-in-pancreas-alone-transplantation-for-chronic-pancreatitis-a-case-report
#15
B H Choi, Y M Park, K H Yang, C W Chu, J H Ryu
Enteric drainage has been the main trend in solitary pancreas transplantation. Compared with bladder drainage, it does not cause metabolic or urologic complications, but there is no way to perform immunologic monitoring, except by graft pancreas biopsy. Additionally, although portal drainage of the graft vein is considered physiological drainage, it has more of a risk for surgical complications. To overcome these disadvantages, we successfully performed inferior vena cava (IVC)-duodenal drainage in pancreas alone transplantation...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27932184/intrapancreatic-splenule-in-a-pancreas-allograft-case-report
#16
K Yadav, O K Serrano, R Kandaswamy
A 16-year-old white man was involved in a motor vehicle collision and suffered head, chest, and abdominal trauma. Despite initial resuscitative efforts, he progressed to brain death and was designated to be an organ donor by his family. He had no earlier medical or surgical history and no high-risk behaviors. Blood work revealed normal creatinine, liver function tests, lipase, and amylase. Viral serologies were negative except for cytomegalovirus IgG and Epstein-Barr virus nucleic acid. Imaging revealed a right kidney contusion, a manubrial fracture, and fractures of right first rib and bilateral scapulae...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27932176/intrahepatic-artery-pseudoaneurysm-induced-hemobilia-caused-by-a-plastic-biliary-stent-after-abo-incompatible-living-donor-liver-transplantation-a-case-report
#17
J M Chun, H T Ha, Y Y Choi, Y J Hwang, J Heo, H K Ryeom, Y S Han
Bile leakage after duct-to-duct anastomosis in living-donor liver transplantation (LDLT) can mostly be managed by therapeutic endoscopic retrograde cholangiopancreatography. Following this, various complications such as biliary infection, pancreatitis, perforation, and bleeding can occur, and endoscopic sphincterotomy is primarily associated with post- endoscopic retrograde cholangiopancreatography bleeding; other causes have been published in case reports. In the present case, a plastic biliary stent used for treating liver abscesses and leakage at the bile duct anastomosis site after ABO-incompatible LDLT resulted in an intrahepatic artery pseudoaneurysm and hemobilia, which were managed by angiography and coil embolization...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27932142/pancreas-preservation-with-viaspan-celsior-and-custodiol-solutions-an-initial-experience
#18
M C Montiel-Casado, J A Pérez-Daga, J A Blanco-Elena, J M Aranda-Narváez, B Sánchez-Pérez, M Cabello-Díaz, P Ruiz-Esteban, F J León-Díaz, C Gutiérrez-de la Fuente, J Santoyo-Santoyo
BACKGROUND: There is still controversy about which preservation solution in pancreas transplantation could be the best. The aim of this study was to analyze our initial experience with Custodiol solution (CuS) compared with Viaspan solution (VS) and Celsior solution (CS) in pancreas transplantation. METHODS: A retrospective study included 94 consecutive pancreatic transplants, from 2007 until 2015. We compared 3 groups, depending on preservation solution: Viaspan (n = 41), Celsior (n = 40), or Custodiol (n = 13)...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27932141/validation-of-the-pancreatic-donor-risk-index-in-simultaneous-pancreas-kidney-transplantation-performed-in-c%C3%A3-rdoba-hospital-from-2000-to-2015
#19
J J Salamanca-Bustos, J P Campos-Hernandez, J M Sánchez-Hidalgo, A Arjona-Sánchez, A Sánchez-González, A J Arenas-Bonilla, J Ruiz-Rabelo, J Carrasco-Valiente, J Ruiz-García, J C Regueiro-López, J Briceño-Delgado, M J Requena-Tapia
BACKGROUND: The Pancreatic Donor Risk Index (PDRI) was developed in 2010 in the United States to predict graft survival after pancreas transplantation, based on donor characteristics and logistical and technical conditions. The aim of the study was to validate the utility of PDRI as a pancreas allograft survival predictor in simultaneous pancreas-kidney transplantation (SPK) transplants performed in our hospital between 2000 and 2015. METHODS: This retrospective analysis of 126 SPK transplants was performed by the same surgical team from the years 2000 to 2015...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27931513/immunogenicity-of-anti-hla-antibodies-in-pancreas-and-islet-transplantation
#20
Benjamin Chaigne, Kirsten Geneugelijk, Benot Bdat, Mohamed Alibashe Ahmed, Gideon Hnger, Sophie de Seigneux, Sandrine Demuylder-Mischler, Thierry Berney, Eric Spierings, Sylvie Ferrari-Lacraz, Jean Villard
The aim of the current study was to characterize the anti-HLA antibodies before and after pancreatic islet or pancreas transplantation. We assessed the risk of anti-donor-specific antibody (DSA) sensitization in a single-center, retrospective clinical study at Geneva University Hospital. Data regarding clinical characteristics, graft outcome, HLA mismatch, donor HLA immunogenicity, and anti-HLA antibody characteristics were collected. Between January 2008 and July 2014, 18 patients received islet transplants, and 26 patients received a pancreas transplant...
November 2016: Cell Transplantation
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