Microfilm study of cultures of islet cells of the bovine fetal pancreas

1978 ◽  
Vol 85 (2) ◽  
pp. 204-207
Author(s):  
V. N. Blyumkin ◽  
R. A. Babikova ◽  
I. N. Kokorin
Keyword(s):  
Islet Cells ◽  
Fetal Pancreas

Islet Cells Grow after Transplantation of Fetal Pancreas and Control of Diabetes

Diabetes ◽  
1981 ◽  
Vol 30 (1) ◽  
pp. 9-13 ◽  
Author(s):  
J. Brown ◽  
D. Heininger ◽  
J. Kuret ◽  
Y. Mullen
Keyword(s):  
Islet Cells ◽  
Fetal Pancreas ◽  
Control Of Diabetes ◽  
And Control

scholarly journals Expression of Insulinoma-Associated 2 (INSM2) in Pancreatic Islet Cells Is Regulated by the Transcription Factors Ngn3 and NeuroD1

Endocrinology ◽  
2011 ◽  
Vol 152 (5) ◽  
pp. 1961-1969 ◽  
Author(s):  
Tao Cai ◽  
Xiang Chen ◽  
Rennian Wang ◽  
Huan Xu ◽  
Yuhui You ◽  
...  
Keyword(s):  
Transcription Factors ◽  
Pancreatic Islets ◽  
Pancreatic Islet ◽  
Chromatin Immunoprecipitation ◽  
Islet Cells ◽  
Mouse Embryos ◽  
Pancreatic Islet Cells ◽  
Neurogenin 3 ◽  
Fetal Pancreas ◽  
E Boxes

The insulinoma-associated 2 (Insm2) gene is a member of the Snail/Gfi1/Insm1 transcriptional repressor superfamily. However, little is known about how the expression of human INSM2 or mouse Insm2 in neuroendocrine tissues is regulated. Here we report the expression of INSM2/Insm2 in human fetal pancreas and mouse embryos, as well as adult pancreatic islets, and its regulation by two major islet transcription factors. Mutagenesis and chromatin immunoprecipitation analysis demonstrated that the proximal E-boxes of the mouse Insm2 promoter are direct targets of neurogenin 3 and neurogenic differentiation 1 (NeuroD1). Furthermore, we found that endogenous Insm2 expression was activated in Ngn3/NeuroD1-transduced pancreatic epithelial duct cells. Our results suggest that Insm2 plays an important role in the differentiation cascade of Ngn3/NeuroD1 signaling in pancreatic islets.

Silver Staining of Pancreatic Islets as Revealed by Electron Microscopy

1967 ◽  
Vol 25 ◽  
pp. 44-45
Author(s):  
Kazuaki Misugi ◽  
Nobuko Misugi ◽  
Hiroshi Yamada
Keyword(s):  
Pancreatic Islet ◽  
Silver Staining ◽  
Islet Cells ◽  
Severe Hypoglycemia ◽  
Granular Cell ◽  
Electron Microscopic Level ◽  
Staining Reaction ◽  
Electron Microscopic ◽  
Pancreatic Islet Cell ◽  
D Cell

The authors had described the fine structure of a type of pancreatic islet cell, which appeared different from typical alpha and beta cells, and tentatively considered that this third type of granular cell probably represents the D cell (Figure 1).Since silver staining has been widely used to differentiate different types of pancreatic islet cells by light microscopy, an attempt to examine this staining reaction at the electron microscopic level was made.Material and Method: Surgically removed specimens from three infants who suffered from severe hypoglycemia were used. The specimens were fixed and preserved in 20% neutral formalin. Frozen sections, 30 to 40 micron thick, were prepared and they were stained by Bielschowsky's method as modified by Suzuki (2). The stained sections were examined under a microscope and islet tissues were isolated. They were fixed in 1% osmium tetroxide in phosphate buffer for one hour and embedded in Epon 812 following dehydration through a series of alcohols and propylene oxide.

Iron status in diabetes mellitus

2019 ◽  
pp. 7-12
Keyword(s):  
Diabetes Mellitus ◽  
Beta Cells ◽  
Defense Mechanism ◽  
Acute Stress ◽  
Islet Cells ◽  
Iron Status ◽  
Acute Phase Reactant ◽  
Iron Deposition ◽  
Muscle Tissues ◽  
High Production

Diabetes mellitus can be defined as chronic metabolic disease which results from either relative or complete absence of insulin by the pancreatic beta islet cells. This in-turn may lead to hyperglycemia due to disturbances in the metabolism of glucose. In the human body, iron is con- sidered to be an effective pro-oxidant and participates in the generation of reactive oxygen species (ROS) such as hydroxyl radical. Because of the poor antioxidant defense mechanism of beta cells (low production of antioxidant enzymes such as catalase, glutathione peroxidase and dismutase), so they are highly prone to iron-induced oxidative stress and iron deposition in it and this will lead to apoptosis, and subsequently insulin deficiency. This iron deposition in beta cells will also lead to insulin resistance by reducing insulin extracting ability of the liver and inhibiting glucose uptake in muscle tissues and fats, this in turn will result in high production of hepatic glucose. Ferritin which is an acute phase reactant protein, that responds to acute stress like trauma, infections, tissue necrosis and surgery, it can produce diabetes mellitus either through inflammation or by increasing iron stores.

THERAPIE EINES METASTASIERENDEN INSELZELLTUMORS MIT STREPTOZOTOCIN

1971 ◽  
Vol 67 (2) ◽  
pp. 405-416 ◽  
Author(s):  
E. Nieschlag ◽  
H. Wombacher ◽  
F. J. Kroeger ◽  
L.V. Habighorst
Keyword(s):  
Liver Metastases ◽  
Blood Sugar ◽  
Mechanism Of Action ◽  
Islet Cell ◽  
Plasma Insulin ◽  
Severe Hypoglycaemia ◽  
Islet Cells ◽  
Intravenous Injections ◽  
High Affinity ◽  
Methyl Nitrosourea

A patient with a metastazing functional islet cell tumour suffering from severe hypoglycaemia was treated with streptozotocin. Four intravenous injections of 1.5 g streptozotocin each were administered in 4 to 6 days intervals. After the 4th injection there were no further episodes of hypoglycaemia, parenteral glucose administration could be stopped and blood sugar and plasma insulin, showing concentrations of up to 405 μU/ml before treatment, reached normal levels. The tumours in the pancreas disappeared and the liver metastases decreased in size and number as judged by arteriography. A hypothesis for the mechanism of action of streptozotocin is proposed. The glucose moiety is considered to facilitate a high affinity to the islet cells whereas the N-methyl-nitrosourea residue serves the active antitumour part of the molecule.

DEVELOPMENT OF ISOLOGOUS TRANSPLANTS OF CELL SUSPENSIONS OF THE FETAL PANCREAS IN THE RAT

1974 ◽  
Vol 77 (1_Suppl) ◽  
pp. S97 ◽  
Author(s):  
K. H. Usadel ◽  
U. Schwedes ◽  
U. Leuschner ◽  
K. Schöffling
Keyword(s):  
Cell Suspensions ◽  
Fetal Pancreas

Monolayer cultures of adult pancreatic islet cells on osmotically disrupted fibroblasts

Diabetes ◽  
1980 ◽  
Vol 29 (6) ◽  
pp. 497-500 ◽  
Author(s):  
P. Meda ◽  
E. L. Hooghe-Peters ◽  
L. Orci
Keyword(s):  
Pancreatic Islet ◽  
Islet Cells ◽  
Pancreatic Islet Cells ◽  
Monolayer Cultures

Growth and hormonal content of human fetal pancreas passaged in athymic mice

Diabetes ◽  
1986 ◽  
Vol 35 (4) ◽  
pp. 464-469 ◽  
Author(s):  
B. E. Tuch ◽  
S. Grigoriou ◽  
J. R. Turtle
Keyword(s):  
Athymic Mice ◽  
Fetal Pancreas ◽  
Human Fetal Pancreas ◽  
Hormonal Content

Contrasting patterns of insulin biosynthesis, compartmental storage, and secretion. Rat tumor versus islet cells

Diabetes ◽  
1984 ◽  
Vol 33 (6) ◽  
pp. 556-561 ◽  
Author(s):  
G. Gold ◽  
M. L. Gishizky ◽  
W. L. Chick ◽  
G. M. Grodsky
Keyword(s):  
Islet Cells ◽  
Insulin Biosynthesis ◽  
Rat Tumor
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