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Pancreas cells transplantation

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https://www.readbyqxmd.com/read/28708597/mri-based-evaluation-of-multiorgan-iron-overload-is-a-predictor-of-adverse-outcomes-in-pediatric-patients-undergoing-allogeneic-hematopoietic-stem-cell-transplantation
#1
Natalia Maximova, Massimo Gregori, Giulia Boz, Roberto Simeone, Davide Zanon, Giulia Schillani, Floriana Zennaro
The medical records of 44 pediatric patients who underwent allogeneic transplantation from 2011 to 2015 were retrospectively reviewed. Magnetic resonance imaging was used to measure iron concentrations in the liver, spleen, pancreas and bone. These patients were divided into two groups, 18 with non-elevated (< 100 μmol/g; Group 1) liver iron concentration before transplantation and 26 with elevated (> 100 μmol/g; Group 2) concentration . We compared transplant-related outcomes in the two groups. Iron overload was a negative prognostic risk factor for sinusoidal obstruction syndrome (OR = 17), osteoporosis (OR = 6...
July 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28693204/treatment-of-a-mixed-acinar-endocrine-carcinoma-with-uptake-on-68-gallium-dotatoc-positron-emission-tomography-computed-tomography-a-case-report
#2
Anneleen De Both, Marc De Man, Roberto Troisi, Hans Van Vlierberghe, Anne Hoorens, Karen Geboes
The case of a 35-year old female patient with a diagnosis of metastatic mixed acinar-endocrine carcinoma (MAEC) is investigated in the present study. The patient was believed to have a well-differentiated neuroendocrine tumor (NET) with a high Ki-67 index and uptake on (68)Gallium-DOTATOC positron emission tomography-computed tomography for 9 years, and was treated accordingly. The patient had long lasting disease control by treatment with sunitinib, and a response was observed in numerous lesions with peptide receptor radionuclide therapy (PRRT)...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28661312/mixed-donor-chimerism-following-simultaneous-pancreas-kidney-transplant
#3
Armin Rashidi, Daniel C Brennan, Ina E Amarillo, Jason R Wellen, Amanda Cashen
OBJECTIVES: Graft-versus-host disease after solid-organ transplant is exceedingly rare. Although the precise pathogenetic mechanisms are unknown, a progressive increase in donor chimerism is a requirement for its development. The incidence of mixed donor chimerism and its timeline after simultaneous pancreas-kidney transplant is unknown. MATERIALS AND METHODS: After encountering 2 cases of graft-versus-host disease after simultaneous pancreas-kidney transplant at our institution over a period of < 2 years, a collaborative pilot study was conducted by the bone marrow transplant, nephrology, and abdominal transplant surgery teams...
June 28, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28655312/transplantation-of-human-fetal-pancreatic-progenitor-cells-ameliorates-renal-injury-in-streptozotocin-induced-diabetic-nephropathy
#4
Yongwei Jiang, Wenjian Zhang, Shiqing Xu, Hua Lin, Weiguo Sui, Honglin Liu, Liang Peng, Qing Fang, Li Chen, Jinning Lou
BACKGROUND: Diabetic nephropathy (DN) is a severe complication of diabetes mellitus (DM). Pancreas or islet transplantation has been reported to prevent the development of DN lesions and ameliorate or reverse existing glomerular lesions in animal models. Shortage of pancreas donor is a severe problem. Islets derived from stem cells may offer a potential solution to this problem. OBJECTIVE: To evaluate the effect of stem cell-derived islet transplantation on DN in a rat model of streptozotocin-induced DM...
June 27, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28639386/development-of-immune-response-to-tissue-restricted-self-antigens-in-simultaneous-kidney-pancreas-transplant-recipients-with-acute-rejection
#5
Muthukumar Gunasekaran, Neeta Vachharajani, Joseph P Gaut, Thin Thin Maw, Rowena Delos Santos, Surendra Shenoy, William C Chapman, Jason Wellen, Thalachallour Mohanakumar
Simultaneous kidney-pancreas transplantation (SKP Tx) is a treatment for end-stage kidney disease secondary to diabetes mellitus. We investigated the role of immune responses to donor human leukocyte antigens (HLA) and tissue-restricted kidney and pancreas self-antigens (KSAgs and PSAgs, respectively) in SKP Tx recipients (SKP TxRs). Sera collected from 39 SKP TxRs were used to determine de novo Abs specific for KSAgs (collagen-IV, Col-IV; fibronectin, FN) and PSAgs (insulin, islet cells, glutamic acid decarboxylase, and pancreas-associated protein-1) by ELISA...
June 21, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28632820/the-nexus-of-stem-cell-derived-beta-cells-and-genome-engineering
#6
Sara D Sackett, Aida Rodriguez, Jon S Odorico
Diabetes, type 1 and type 2 (T1D and T2D), are diseases of epidemic proportions, which are complicated and defined by genetics, epigenetics, environment, and lifestyle choices. Current therapies consist of whole pancreas or islet transplantation. However, these approaches require life-time immunosuppression, and are compounded by the paucity of available donors. Pluripotent stem cells have advanced research in the fields of stem cell biology, drug development, disease modeling, and regenerative medicine, and importantly allows for the interrogation of therapeutic interventions...
2017: Review of Diabetic Studies: RDS
https://www.readbyqxmd.com/read/28609558/ipsc-technology-based-regenerative-therapy-for-diabetes
#7
REVIEW
Yasushi Kondo, Taro Toyoda, Nobuya Inagaki, Kenji Osafune
The directed differentiation of human pluripotent stem cells, such as embryonic stem cells (hESCs) and induced pluripotent stem cells (hiPSCs), into pancreatic endocrine lineages has been vigorously examined by reproducing the in vivo developmental processes of pancreas. Recent advances in this research field have enabled the generation from hESCs/iPSCs of functionally mature β-like cells in vitro that show glucose-responsive insulin secretion ability. The therapeutic potentials of hESC/iPSC-derived pancreatic cells have been evaluated using diabetic animal models, and transplantation methods including immunoprotective devices that prevent immune responses from hosts to the implanted pancreatic cells have been investigated towards the development of regenerative therapies against diabetes...
June 13, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28591747/identification-and-causes-of-metabonomic-difference-between-orthotopic-and-subcutaneous-xenograft-of-pancreatic-cancer
#8
Bohan Zhan, Shi Wen, Jie Lu, Guiping Shen, Xianchao Lin, Jianghua Feng, Heguang Huang
Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal tumors. However, the methodological differences between orthotopic and subcutaneous xenograft (OX and SX) models will cause confusion in understanding its pathological mechanism and clinical relevance. In this study, SX and OX models were established by implanting Panc-1 and BxPC-3 cell strains under skin and on the pancreas of mice, respectively. The tumor tissue and serum samples were collected for1H NMR spectroscopy followed by univariate and multivariate statistical analyses...
May 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28583545/simultaneous-subtotal-pancreatectomy-and-streptozotocin-injection-for-diabetes-modeling-in-cynomolgus-monkeys
#9
H Park, J B Park, J H Kim, K W Lee, H S Lee, G-S Kim, D-Y Shin, S-H Oh, S-M Jin, S J Kim
BACKGROUND: In an experimental animal model of islet transplantation, stable induction of insulin-dependent diabetes mellitus (IDDM) and islet isolation from donor pancreas are essential. Total pancreatectomy for IDDM induction and islet procurement in nonhuman primates leads to unwanted loss of exocrine function and may lead to morbidities associated with IDDM. METHODS: IDDM induction with streptozotocin (STZ) is associated with drug toxicity of STZ and necessitates the killing of another animal for islet procurement...
June 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28562418/autologous-islet-transplantation-challenges-and-lessons
#10
Ty B Dunn, Joshua J Wilhelm, Melena D Bellin, Timothy L Pruett
PURPOSE OF REVIEW: Human islet isolation and autotransplantation [autologous islet transplant (AUTX)] is performed to prevent or ameliorate brittle diabetes after total pancreatectomy performed for benign disease. The success or failure of the transplant can be associated with a profound impact on the individual's quality of life and even survival. AUTX offers unique insights into the effects of pancreas quality, islet number, isolation technique and alternate site engraftment on transplant efficacy...
August 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28538243/bk-virus-as-a-mediator-of-graft-dysfunction-following-kidney-transplantation
#11
Stephanie G Yi, Richard J Knight, Keri E Lunsford
PURPOSE OF REVIEW: BK virus is a significant risk factor for kidney allograft dysfunction and loss among renal transplant recipients. Currently, there is no proven effective treatment except for the reduction of immunosuppression. In this review, we discuss diagnostic challenges and current treatment options for BK in kidney transplant recipients. RECENT FINDINGS: Antiviral and antibiotic therapies have been employed for BK viraemia with variable efficacy. In addition, novel therapeutic regimens such as adoptive transfer of targeted T cells have been described as possible treatment options for recipients with BK nephropathy...
August 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28535085/characterization-of-an-encapsulated-insulin-secreting-human-pancreatic-beta-cell-line-in-a-modular-microfluidic-device
#12
Argia Acarregui, Jesús Ciriza, Laura Saenz Del Burgo, Haritz Gurruchaga Iribar, José Yeste, Xavi Illa, Gorka Orive, Rosa M Hernández, Rosa Villa, Jose Luis Pedraz
Type I diabetes mellitus is characterised by the destruction of the insulin producing beta cells within the pancreas by the immune system. After the success of Edmonton protocol, islet transplantation has shown to be a promising therapy, but with the Achilles´ heel of the need of using immunosuppressive drugs. Currently, cell encapsulation technology represents a real alternative to protect transplanted islets from the host´s immune attack. Although preliminary in vitro studies with encapsulated cells have been traditionally performed under static conditions in terms of viability and efficiency, these static cultures do not represent a close approach to in vivo environments...
June 6, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28532102/islet-encapsulated-implantable-composite-hollow-fiber-membrane-based-device-a-bioartificial-pancreas
#13
Rohit S Teotia, Sachin Kadam, Atul Kumar Singh, Surendra Kumar Verma, Ashutosh Bahulekar, Sujata Kanetkar, Jayesh Bellare
Islets from xeno-sources and islet like clusters derived from autologus stem cells have emerged as alternatives to cadaveric pancreas used for treatment of type 1 diabetes. However, the immuno-isolation of these islets from the host immune system suffers from the issue of biocompatibility and hypoxia. To overcome the issues of immunobarrier biocompatibility, we developed a Polysulfone (Psf)/TPGS composite hollow fiber membrane (HFM) using a hollow fiber spinning pilot plant specially developed for this purpose...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28515126/radiomanganese-pet-detects-changes-in-functional-%C3%AE-cell-mass-in-mouse-models-of-diabetes
#14
Reinier Hernandez, Stephen A Graves, Trillian Gregg, Halena R VanDeusen, Rachel J Fenske, Haley N Wienkes, Christopher G England, Hector F Valdovinos, Justin J Jeffery, Todd E Barnhart, Gregory W Severin, Robert J Nickles, Michelle E Kimple, Matthew J Merrins, Weibo Cai
The noninvasive measurement of functional β-cell mass would be clinically valuable for monitoring the progression of type 1 and type 2 diabetes, as well as the viability of transplanted insulin-producing cells. Although previous work employing magnetic resonance imaging has shown promise for functional β-cell mass determination through voltage-dependent Ca(2+) channel (VDCC)-mediated internalization of Mn(2+), the clinical utility of this technique is limited by the cytotoxic levels of Mn(2+) contrast agent...
May 17, 2017: Diabetes
https://www.readbyqxmd.com/read/28500662/application-of-a-novel-bioreactor-for-in-vivo-engineering-of-pancreas-tissue
#15
Javad Hashemi, Parvin Pasalar, Masoud Soleimani, Reza Khorramirouz, Kiarad Fendereski, Seyed Ehsan Enderami, Abdol-Mohammad Kajbafzadeh
Type 1 diabetes is characterized by autoimmune destruction of pancreatic cells. Organ transplantation is an acceptable treatment for native organ failure. However, it is associated with several problems due to a number of reasons, such as the lack of appropriate donors and immunosuppression. In our present study, a novel model is presented for in vivo recellularization of acellular pancreas by implanting between the host pancreas and the adjacent omental flap. In this study, the pancreases were harvested and cannulated via the common bile duct and then, the scaffolds were acellularized by a detergent-based protocol...
May 13, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28489277/pancreas-after-islet-transplantation-in-nonuremic-type-1-diabetes-a-strategy-for-restoring-durable-insulin-independence
#16
S A Wisel, J M Gardner, G R Roll, J Harbell, C E Freise, S Feng, S M Kang, R Hirose, D B Kaufman, A M Posselt, P G Stock
Islet transplantation offers a minimally invasive approach for β cell replacement in diabetic patients with hypoglycemic unawareness. Attempts at insulin independence may require multiple islet reinfusions from distinct donors, increasing the risk of allogeneic sensitization. Currently, solid organ pancreas transplant is the only remaining surgical option following failed islet transplantation in the United States; however, the immunologic impact of repeated exposure to donor antigens on subsequent pancreas transplantation is unclear...
May 10, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28467694/durable-control-of-autoimmune-diabetes-in-mice-achieved-by-intraperitoneal-transplantation-of-neo-islets-three-dimensional-aggregates-of-allogeneic-islet-and-mesenchymal-stem-cells
#17
Christof Westenfelder, Anna Gooch, Zhuma Hu, Jon Ahlstrom, Ping Zhang
Novel interventions that reestablish endogenous insulin secretion and thereby halt progressive end-organ damage and prolong survival of patients with autoimmune Type 1 diabetes mellitus (T1DM) are urgently needed. While this is currently accomplished with allogeneic pancreas or islet transplants, their utility is significantly limited by both the scarcity of organ donors and life-long need for often-toxic antirejection drugs. Coadministering islets with bone marrow-derived mesenchymal stem cells (MSCs) that exert robust immune-modulating, anti-inflammatory, anti-apoptotic, and angiogenic actions, improves intrahepatic islet survival and function...
May 3, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28466634/update-on-pancreatic-transplantation-on-the-management-of-diabetes
#18
Carlo Lombardo, Vittorio G Perrone, Gabriella Amorese, Fabio Vistoli, Walter Baronti, Piero Marchetti, Ugo Boggi
Pancreas transplantation is the only therapy that can restore insulin independence in beta-cell penic diabetic recipients. Because of the need for life-long immunosuppression and the intial surgical risk associated with the transplant procedure, Pancreas transplantation is a therapeutic option only in selected diabetic patients. Based on renal function, three main populations of diabetic recipients of a pancreas transplant can be identified: uremic patients, post-uremic patients (following successful kidney transplantation), and non-uremic patients...
May 2, 2017: Minerva Medica
https://www.readbyqxmd.com/read/28465854/high-risk-neuroblastoma-with-metastases-to-bilateral-kidneys-at-diagnosis
#19
Toshihide Yoshikawa, Akihiko Tanizawa, Koji Suzuki, Kazumi Ikeda, Eishi Nomura, Yumekichi Maeda, Nanae Tanaka, Kenta Yamada, Yasuhiro Sakai, Yoshiaki Imamura, Yusei Ohshima
Renal metastasis at diagnosis with neuroblastoma is rare. We present a 14-month-old boy who was diagnosed with high-risk neuroblastoma with multiple metastases, including bilateral kidneys. He received five cycles of induction chemotherapy and high-dose chemotherapy with autologous peripheral blood stem cell transplantation. All of the lesions shrank, and magnetic resonance imaging indicated that some of the metastases had disappeared. However, there were residual masses in the bilateral kidneys, and histological examination revealed the presence of tumor cells...
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28453285/pharmacological-reprogramming-of-somatic-cells-for-regenerative-medicine
#20
Min Xie, Shibing Tang, Ke Li, Sheng Ding
Lost or damaged cells in tissues and organs can be replaced by transplanting therapeutically competent cells. This approach requires methods that effectively manipulate cellular identities and properties to generate sufficient numbers of desired cell types for transplantation. These cells can be generated by reprogramming readily available somatic cells, such as fibroblasts, into induced pluripotent stem cells (iPSCs), which can replicate indefinitely and give rise to any somatic cell type. This reprogramming can be achieved with genetic methods, such as forced expression of pluripotency-inducing transcription factors (TFs), which can be further improved, or even avoided, with pharmacological agents...
April 28, 2017: Accounts of Chemical Research
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