pancreatic islet cells
Recently Published Documents


TOTAL DOCUMENTS

540
(FIVE YEARS 35)

H-INDEX

59
(FIVE YEARS 2)

2022 ◽  
Vol 8 ◽  
Author(s):  
Yuhua Gao ◽  
Weijun Guan ◽  
Chunyu Bai

In this study, we isolated and cultured pancreatic ductal cells from canines and revealed the possibility for using them to differentiate into functional pancreatic beta cells in vitro. Passaged pancreatic ductal cells were induced to differentiate into beta-like pancreatic islet cells using a mixture of induced factors. Differentiated pancreatic ductal cells were analyzed based on intracellular insulin granules using transmission electron microscopy, the expression of insulin and glucagon using immunofluorescence, and glucose-stimulated insulin secretion using ELISA. Our data revealed that differentiated pancreatic ductal cells not only expressed insulin and glucagon but also synthesized insulin granules and secreted insulin at different glucose concentrations. Our study might assist in the development of effective cell therapies for the treatment of type 1 diabetes mellitus in dogs.


Folia Medica ◽  
2021 ◽  
Vol 63 (6) ◽  
pp. 875-883
Author(s):  
Agung Putra ◽  
Zakariya Hadi Suwiryo ◽  
Adi Muradi Muhar ◽  
Agus Widyatmoko ◽  
Fifin Luthfia Rahmi

Introduction: Diabetes is a heterogeneous group of metabolic diseases characterized by elevated blood glucose due to autoimmune disorder or a combination of insulin resistance and insulin deficiency. VEGF and PDGF are the main actors in the regeneration of damaged pancreatic tissue. However, the prolonged release of these molecules may induce fibrosis formation. Mesenchymal stem cells (MSCs) have a high potential to regenerate damaged pancreatic tissue by releasing PDGF and VEGF. Aim: This study aimed to investigate the effect of MSCs on the levels of PDGF and VEGF on days 2 and 44 in diabetic mice and determine the number of pancreatic islet cells and blood glucose levels. Materials and methods: This study used a post-control group design with animals divided into five groups: sham, control, and three treatment groups (P) which were given MSCs at doses of 1.5×105, 3×105, and 6×105 cells. The levels of PDGF, VEGF, and blood glucose were measured by enzyme-linked immunosorbent assay (ELISA), while the number of pancreatic islet cells was analyzed using H&E staining. Results: This study showed a significant increase of VEGF and PDGF levels on day 2 and a significant increase in islet cell percentages on day 44 in line with the decreased blood glucose level. However, there was no difference between VEGF and PDGF levels on day 44. Conclusions: MSCs regulate PDGF and VEGF levels in wound healing phases and remodel pancreatic islet β-cells regeneration to control blood glucose in diabetic model mice.


Author(s):  
Reuben-Kalu J. I. ◽  
Renuka R.

This study was undertaken to evaluate the remedial effect of the aqueous seed extract of Mucuna pruriens (ASEMP) on the endocrine region of pancreas of nicotinamide-streptozotocin-induced diabetes in Wistar rats. The anti-hyperglycemic efficiency of two varieties of Mucuna pruriens var utilis; IIHR Selection 3 and Arka Dhanvantari was investigated. Oral administration of ASEMP against the nicotinamide-streptozotocin-induced diabetes in the Wistar rats showed anti-hyperglycemic effect on the blood glucose level (94 ± 0.2 mg/dl ASEMP 400 mg/kg) when compared with the control group (92 ± 0.2 mg/dl glibenclamide 5 mg/kg), (248 ± 0.3 mg/dl Diabetic control) and (90 ± 0.3 mg/dl Normal control). Significant reduction in creatinine level of the nicotinamide-streptozotocin-induced diabetic rats treated with ASEMP was also recorded. Histopathology examination of the endocrine region of pancreas of the rats revealed restoration of pancreatic islet cells in the diabetic-ASEMP treated rats as the beta cell mass increased and necrotic changes was reduced significantly in contrast with the diabetic control group which showed degenerated pancreatic islet cells. Therefore, this study supports and recommends the exploration of the aqueous seed extract of M. pruriens as an alternative medicine for the management of type-2 diabetes.


Biochimie ◽  
2021 ◽  
Author(s):  
Thatiany de Souza Marinho ◽  
Fabiane Ferreira Martins ◽  
Luiz Eduardo de Macedo Cardoso ◽  
Marcia Barbosa Aguila ◽  
Carlos Alberto Mandarim-de-Lacerda

Diabetes ◽  
2021 ◽  
Vol 70 (Supplement 1) ◽  
pp. 247-OR
Author(s):  
CHIARA LASCONI ◽  
MATTHEW C. PAHL ◽  
JAMES A. PIPPIN ◽  
CHUN SU ◽  
MATTHEW JOHNSON ◽  
...  

2021 ◽  
pp. 130224
Author(s):  
Shi-ting Chen ◽  
Si-yuan He ◽  
Wan-ying Wang ◽  
Hai-jun Jin ◽  
Jian Lu ◽  
...  

Author(s):  
Razieh Musapour Soltan-Abad ◽  
Sorayya Kheirouri ◽  
Mehran Mesgari Abbasi ◽  
Mohammad Alizadeh ◽  
Monireh Khordadmehr

2021 ◽  
Vol 2 (1) ◽  
pp. 01-09
Author(s):  
O. B. Akinsanya ◽  
P. F. Ayodele ◽  
O. F. Onifade ◽  
M. O. Salimom

Diabetes mellitus develops either due to insufficient insulin secretion or lack of insulin resulting from damaged pancreas beta cells. Dyslipidaemia is an acute complication in diabetes mellitus. The aim of this study was to investigate the extenuating effects of T. cattapa leaves and P. americana seed aqueous extracts on streptozotocin-induced lipids profile perturbation and pancreatic damage in experimental rats. Thirty male albino rats were randomly divided into six groups (n = 5). Group 1: (negative control), group 2: 80 mg/kgbwt streptozotocin (positive control), group 3: (80 mg/kgbwt streptozotocin + 200 mg/kgbwt T. catappa leave extract), group 4: (80 mg/kgbwt streptozotocin + 200 mg/kgbwt Persea americana seed extract), group 5: (80 mg/kgbwt streptozotocin + 200 mg/kgbwt extracts-mixture), group 6: (80 mg/kgbwt streptozotocin + 5 mg/kgbwt glibenclamide (standard drug). A single dose of streptozotocin was administered to the rats intraperitoneally; the extracts and glibenclamide were administered orally for 21 days, after which their pancreas was excised for histology. Thereafter, extracts of T. catappa leaves and P. americana seed on serum lipid levels imbalance in streptozotocin-induced diabetic rats were investigated. Histological studies showed a degenerative effect of the pancreatic islet cells of strotozotocin-induced groups. Results showed improvement in the regulation of lipid metabolism as well as the regeneration of the beta cells of pancreas on treatment with T. catappa leaves and P. americana seed. The extracts both equally exert significant antidyslipidemic effects in diabetic rats, in view of the extenuating effects of the extracts on pancreatic islet cells.


2021 ◽  
Vol 12 ◽  
Author(s):  
Shiuhwei Chen ◽  
ZhiJiang Huang ◽  
Harrison Kidd ◽  
Min Kim ◽  
Eul Hyun Suh ◽  
...  

Appropriate insulin secretion is essential for maintaining euglycemia, and impairment or loss of insulin release represents a causal event leading to diabetes. There have been extensive efforts of studying insulin secretion and its regulation using a variety of biological preparations, yet it remains challenging to monitor the dynamics of insulin secretion at the cellular level in the intact pancreas of living animals, where islet cells are supplied with physiological blood circulation and oxygenation, nerve innervation, and tissue support of surrounding exocrine cells. Herein we presented our pilot efforts of ZIMIR imaging in pancreatic islet cells in a living mouse. The imaging tracked insulin/Zn2+ release of individual islet β-cells in the intact pancreas with high spatiotemporal resolution, revealing a rhythmic secretion activity that appeared to be synchronized among islet β-cells. To facilitate probe delivery to islet cells, we also developed a chemogenetic approach by expressing the HaloTag protein on the cell surface. Finally, we demonstrated the application of a fluorescent granule zinc indicator, ZIGIR, as a selective and efficient islet cell marker in living animals through systemic delivery. We expect future optimization and integration of these approaches would enable longitudinal tracking of beta cell mass and function in vivo by optical imaging.


Sign in / Sign up

Export Citation Format

Share Document