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Beta cell regeneration

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https://www.readbyqxmd.com/read/28745027/histologic-and-histomorphometric-assessment-of-sinus-floor-augmentation-with-beta-tricalcium-phosphate-alone-or-in-combination-with-pure-platelet-rich-plasma-or-platelet-rich-fibrin-a-randomized-clinical-trial
#1
Songül Cömert Kılıç, Metin Güngörmüş, Seçil Nazife Parlak
BACKGROUND: The potential effects of adding pure platelet-rich plasma (P-PRP) or platelet-rich fibrin (PRF) to beta-tricalcium phosphate (β-TCP) graft substitute on bone formation and regeneration after maxillary sinus-floor elevation remains unclear. PURPOSE: To compare the histologic and histomorphometric outcomes of maxillary sinus-floor augmentation among β-TCP alone, P-PRP-mixed β-TCP, and PRF-mixed β-TCP. MATERIAL AND METHODS: In this randomized clinical trial, elevated sinus cavities were grafted with β-TCP (the control group), P-PRP-mixed β-TCP (the P-PRP group), and PRF-mixed β-TCP (PRF group)...
July 26, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28727618/clinical-study-of-bone-regeneration-by-conditioned-medium-from-mesenchymal-stem-cells-after-maxillary-sinus-floor-elevation
#2
Wataru Katagiri, Junna Watanabe, Naoto Toyama, Masashi Osugi, Kohei Sakaguchi, Hideharu Hibi
OBJECTIVE: This clinical study was undertaken to evaluate the safety of use of the secretome of bone marrow-derived mesenchymal stem cells (MSC-CM) for maxillary sinus floor elevation (SFE). MATERIALS AND METHODS: MSC-CM was prepared from conditioned medium from human bone marrow-derived MSCs. Six partially edentulous patients were enrolled in the study. MSC-CM was mixed with porous beta-tricalcium phosphate (β-TCP) and implanted in 4 patients (experimental group), whereas only β-TCP was implanted in the other 2 patients (control group)...
August 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28710530/proteomic-characterisation-reveals-active-wnt-signalling-by-human-multipotent-stromal-cells-as-a-key-regulator-of-beta-cell-survival-and-proliferation
#3
Miljan Kuljanin, Gillian I Bell, Stephen E Sherman, Gilles A Lajoie, David A Hess
AIMS/HYPOTHESIS: Novel strategies to stimulate the expansion of beta cell mass in situ are warranted for diabetes therapy. The aim of this study was to elucidate the secretome of human bone marrow (BM)-derived multipotent stromal cells (MSCs) with documented islet regenerative paracrine function. We hypothesised that regenerative MSCs will secrete a unique combination of protein factors that augment islet regeneration. METHODS: Human BM-derived MSCs were examined for glucose-lowering capacity after transplantation into streptozotocin-treated NOD/severe combined immunodeficiency (SCID) mice and segregated into samples with regenerative (MSC(R)) vs nonregenerative (MSC(NR)) capacity...
July 14, 2017: Diabetologia
https://www.readbyqxmd.com/read/28702122/gaba-signaling-stimulates-%C3%AE-cell-mediated-%C3%AE-like-cell-neogenesis
#4
Tiziana Napolitano, Fabio Avolio, Andhira Vieira, Nouha Ben-Othman, Monica Courtney, Elisabet Gjernes, Biljana Hadzic, Noémie Druelle, Sergi Navarro Sanz, Serena Silvano, Ahmed Mansouri, Patrick Collombat
Diabetes is a chronic and progressing disease, the number of patients increasing exponentially, especially in industrialized countries. Regenerating lost insulin-producing cells would represent a promising therapeutic alternative for most diabetic patients. To this end, using the mouse as a model, we reported that GABA, a food supplement, could induce insulin-producing beta-like cell neogenesis offering an attractive and innovative approach for diabetes therapeutics.
2017: Communicative & Integrative Biology
https://www.readbyqxmd.com/read/28698986/novelties-in-the-pathophysiology-and-management-of-portal-hypertension-new-treatments-on-the-horizon
#5
REVIEW
Seong Hee Kang, Moon Young Kim, Soon Koo Baik
Portal hypertension (PH) is responsible for the most severe complications of cirrhosis and leading cause of death and liver transplantation. The standard pharmacological treatment available for PH currently consists of the use of a non-selective beta-blocker. However, a significant proportion of patients do not respond to pharmacological treatment. This has led to the development of identifiable targets for the discovery of new horizons in PH treatment. Recently, there has been significant progress in understanding the mechanism behind PH, which is a product of increased hepatic vascular resistance including structural changes and functional change due to endothelial dysfunction...
July 11, 2017: Hepatology International
https://www.readbyqxmd.com/read/28689201/the-effects-of-human-beta-defensins-on-skin-cells-in-vitro
#6
Jeroen W J van Kilsdonk, Patrick A M Jansen, Ellen H van den Bogaard, Charlotte Bos, Mieke Bergers, Patrick L J M Zeeuwen, Joost Schalkwijk
BACKGROUND: Defensins are antimicrobial peptides that exert immunomodulatory and chemotactic functions. Based on these properties and their high expression levels in the skin, they are likely to affect skin inflammation, infection, and wound healing. This may lead to therapeutic applications in (burn) wound healing. OBJECTIVE: We aimed to investigate the effects of human β-defensins (hBDs) on keratinocytes and fibroblasts, 2 major skin cell types involved in skin regeneration...
July 8, 2017: Dermatology: International Journal for Clinical and Investigative Dermatology
https://www.readbyqxmd.com/read/28679315/bone-marrow-mesenchymal-stem-cell-derived-cd63-exosomes-transport-wnt3a-exteriorly-and-enhance-dermal-fibroblast-proliferation-migration-and-angiogenesis-in-vitro
#7
Jeffrey D McBride, Luis Menocal-Rodriguez, Ambar Candanedo, Wellington Guzman, Marta Garcia-Contreras, Evangelos Van Badiavas
Wnts are secreted glycoproteins that regulate stem cell self-renewal, differentiation, and cell-to-cell communication during embryonic development and in adult tissues. Bone marrow mesenchymal stem cells (BM-MSCs) have been shown to stimulate dermis repair and regeneration; however, it is unclear how BM-MSCs may modulate downstream Wnt signaling. While recent reports implicate that Wnt ligands and Wnt messenger RNAs (such as Wnt4) exist within the interior compartment of exosomes, it has been debated whether or not Wnts exist on the exterior surface of exosomes to travel in the extracellular space...
July 5, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28676760/combined-oral-administration-of-gaba-and-dpp-4-inhibitor-prevents-beta-cell-damage-and-promotes-beta-cell-regeneration-in-mice
#8
Wenjuan Liu, Dong Ok Son, Harry K Lau, Yinghui Zhou, Gerald J Prud'homme, Tianru Jin, Qinghua Wang
γ-aminobutyric acid (GABA) or glucagon-like peptide-1 based drugs, such as sitagliptin (a dipeptidyl peptidase-4 inhibitor), were shown to induce beta cell regenerative effects in various diabetic mouse models. We propose that their combined administration can bring forth an additive therapeutic effect. We tested this hypothesis in a multiple low-dose streptozotocin (STZ)-induced beta cell injury mouse model (MDSD). Male C57BL/6J mice were assigned randomly into four groups: non-treatment diabetic control, GABA, sitagliptin, or GABA plus sitagliptin...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28672010/fibroblasts-accelerate-islet-revascularization-and-improve-long-term-graft-survival-in-a-mouse-model-of-subcutaneous-islet-transplantation
#9
Marcos Perez-Basterrechea, Manuel Martinez Esteban, Maria Alvarez-Viejo, Tania Fontanil, Santiago Cal, Marta Sanchez Pitiot, Jesus Otero, Alvaro Jesus Obaya
Pancreatic islet transplantation has been considered for many years a promising therapy for beta-cell replacement in patients with type-1 diabetes despite that long-term clinical results are not as satisfactory. This fact points to the necessity of designing strategies to improve and accelerate islets engraftment, paying special attention to events assuring their revascularization. Fibroblasts constitute a cell population that collaborates on tissue homeostasis, keeping the equilibrium between production and degradation of structural components as well as maintaining the required amount of survival factors...
2017: PloS One
https://www.readbyqxmd.com/read/28662879/use-of-platelet-rich-plasma-in-endodontic-procedures-in-adults-regeneration-or-repair-a-report-of-3-cases-with-5%C3%A2-years-of-follow-up
#10
José Francisco Gaviño Orduña, Javier Caviedes-Bucheli, María C Manzanares Céspedes, Esther Berástegui Jimeno, Benjamín Martín Biedma, Juan José Segura-Egea, José López-López
INTRODUCTION: Regenerative endodontic procedures (REP) are a promising alternative for necrotic immature teeth in adolescents and children, but very little evidence is available on this alternative in long-lasting necrotic teeth with open apices in adults. REPs are designed to replace damaged structures of the pulp-dentin complex, but no regeneration has been obtained in any of the cases described in necrotic immature permanent teeth with apical periodontitis with histologic results. The results are limited to periapical tissue repair with increasing root length, thickening of the root walls, and apical closure in young patients...
June 26, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28638086/wnt2b-attenuates-hscs-activation-and-liver-fibrosis-through-negative-regulating-tlr4-signaling
#11
Yi Yuan, Qiuju Han, Siyu Li, Zhigang Tian, Jian Zhang
The Wingless-type MMTV integration site family member 2b (Wnt2b) has been found to be a principal mediator of liver development and regeneration. However, the significance of Wnt2b in the pathogenesis of fibrosis-related liver diseases remains undefined. Here, we report that Wnt2b was highly expressed in the fibrotic liver tissues, exhibiting protective effects against activation of hepatic stellate cells (HSCs) and fibrosis progression. We identified a negative regulation of Wnt2b on the toll-like receptor 4 (TLR4) activation-mediated pro-fibrogenic effects...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28625845/injury-and-defective-regeneration-of-the-epithelial-basement-membrane-in-corneal-fibrosis-a-paradigm-for-fibrosis-in-other-organs
#12
REVIEW
Steven E Wilson, Gustavo K Marino, Andre A M Torricelli, Carla S Medeiros
Myofibroblast-mediated fibrosis is important in the pathophysiology of diseases in most organs. The cornea, the transparent anterior wall of the eye that functions to focus light on the retina, is commonly affected by fibrosis and provides an optimal model due to its simplicity and accessibility. Severe injuries to the cornea, including infection, surgery, and trauma, may trigger the development of myofibroblasts and fibrosis in the normally transparent connective tissue stroma. Ultrastructural studies have demonstrated that defective epithelial basement membrane (EBM) regeneration after injury underlies the development of myofibroblasts from both bone marrow- and keratocyte-derived precursor cells in the cornea...
June 15, 2017: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/28616246/fibroblast-reticular-cells-engineer-a-blastema-extracellular-network-during-digit-tip-regeneration-in-mice
#13
Luis Marrero, Jennifer Simkin, Mimi Sammarco, Ken Muneoka
The regeneration blastema which forms following amputation of the mouse digit tip is composed of undifferentiated cells bound together by an organized network of fibers. A monoclonal antibody (ER-TR7) that identifies extracellular matrix (ECM) fibers produced by fibroblast reticular cells during lymphoid organogenesis was used to characterize the ECM of the digit, the blastema, and the regenerate. Digit fibroblast reticular cells produce an ER-TR7(+) ECM network associated with different tissues and represent a subset of loose connective tissue fibroblasts...
April 2017: Regeneration
https://www.readbyqxmd.com/read/28595815/adipose-derived-stem-cells-seeded-in-pluronic-f-127-hydrogel-promotes-diabetic-wound-healing
#14
Lin Kaisang, Wang Siyu, Fan Lijun, Pan Daoyan, Cory J Xian, Shen Jie
BACKGROUND: Chronic nonhealing wound is a multifactorial complication of diabetes that results specifically as a consequence of impaired angiogenesis and currently lacks in effective treatments. Although a stem cell-based therapy may provide a novel treatment to augment diabetic wound healing, inferior cell survival at the diabetic skin wound is one of the key causes that are responsible for the low efficacy of the stem cell therapy. MATERIALS AND METHODS: In this work, we used an injectable, biocompatible, and thermosensitive hydrogel Pluronic F-127 to encapsulate allogeneic nondiabetic adipose-derived stem cells (ADSCs) and topically applied the cells to a full-thickness cutaneous wound in the streptozotocin-induced diabetic model in rats...
May 5, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28580283/foxa2-and-pdx1-cooperatively-regulate-postnatal-maturation-of-pancreatic-%C3%AE-cells
#15
Aimée Bastidas-Ponce, Sara S Roscioni, Ingo Burtscher, Erik Bader, Michael Sterr, Mostafa Bakhti, Heiko Lickert
OBJECTIVE: The transcription factors (TF) Foxa2 and Pdx1 are key regulators of beta-cell (β-cell) development and function. Mutations of these TFs or their respective cis-regulatory consensus binding sites have been linked to maturity diabetes of the young (MODY), pancreas agenesis, or diabetes susceptibility in human. Although Foxa2 has been shown to directly regulate Pdx1 expression during mouse embryonic development, the impact of this gene regulatory interaction on postnatal β-cell maturation remains obscure...
June 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28559136/intradiencephalon-injection-of-histamine-inhibited-the-recovery-of-locomotor-function-of-spinal-cord-injured-zebrafish
#16
Shu-Bing Huang, Hou-De Zhao, Lin-Fang Wang, Meng-Fei Sun, Ying-Li Zhu, Yi-Bo Wu, Yi-Da Xu, Shi-Xiao Peng, Chun Cui, Yan-Qin Shen
Human spinal cord injury (SCI) usually causes irreversible disability beneath the injured site due to poor neural regeneration. On the contrary, zebrafish show significant regenerative ability after SCI, thus is usually worked as an animal model for studying neuroregeneration. Most of the previous SCI studies focused on the local site of SCI, the supraspinal-derived signals were rarely mentioned. Here we showed that intradiencephalon injection of histamine (HA) inhibited the locomotor recovery in adult zebrafish post-SCI...
May 27, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28551550/antidiabetic-properties-of-capparis-spinosa-l-and-its-components
#17
REVIEW
Hamideh Vahid, Hassan Rakhshandeh, Ahmad Ghorbani
An increasing line of evidence confirmed that apart from conventional hypoglycemic drugs, diet and medicinal plants have beneficial effects on diabetes. Capparis spinosa L. (Caper) is a perennial shrub in the Capparidaceae family. It grows in different regions of the world, particularly in Asian and African countries. A wide range of biological activities such as antioxidant, anti-inflammatory, anticancer, antimicrobial, and antidiabetic effects have been reported for this plant. In this review, it is focused on beneficial effects of C...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28542487/characterization-of-micrornas-expression-profiles-in-human-dental-derived-pluripotent-stem-cells
#18
Xiaobing Tan, Qingyuan Dai
Induced pluripotent stem cells (iPSCs) technology provides a powerful means to generate and regenerate unlimited pluripotent stem cells directly from body tissue cells. Stem cells from apical papilla (SCAP) and Dental pulp stem cells (DPSCs) are present in 'cell-rich zones' within the dental pulp region, which are capable of regenerating pulp and dentin tissues in vivo. In this study, we investigated the difference of miRNAs expression in SCAPs and DPSCs before and after the reprogramming. Using miRNA microarray, 134 and 265 differentially expressed miRNAs in DPSCs- and SCAP-iPSCs were up-regulated compared to these before reprogramming...
2017: PloS One
https://www.readbyqxmd.com/read/28539839/ppard-is-an-inhibitor-of-cartilage-growth-in-external-ears
#19
Zhen Zhang, Yanyu Duan, Zhongping Wu, Hui Zhang, Jun Ren, Lusheng Huang
Peroxisome proliferator-activated receptor beta/delta (PPARD) is an important determinant of multiple biological processes. Our previous studies identified a missense mutation in the PPARD gene that significantly reduces its transcription activity, and consequently causes enlarged external ears in pigs. However, the mechanisms underlying the causality has remained largely unknown. Here, we show that PPARD retards the development of auricular cartilage by accelerating the apoptosis of cartilage stem/progenitor cells (CSPCs), the terminal differentiation of cartilage cells and the degradation of cartilage extracellular matrix in the auricle...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28532087/the-repairing-of-full-thickness-skin-deficiency-and-its-biological-mechanism-using-decellularized-human-amniotic-membrane-as-the-wound-dressing
#20
Mengsheng Song, Weiqing Wang, Qihua Ye, Shizhong Bu, Zhisen Shen, Yabin Zhu
Human amniotic membrane (HAM) was a biocompatible scaffold with advantages of anti-inflammatory, low antigen, feasibility, tolerance and low cost. In our previous work, HAM was treated to be decellularized using surfactant, lipase and DNAase methods and the efficacy as an implantable biological mesh was verified after decellularization treatment. In this work, we used the previous protocol to decellularize the fresh HAM, and applied it to repair full-thickness skin defects with Sprague-Dawley rats as the test animals...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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