Search results for: AntiInsulin
#24438371 2014/01/17 To Up
Obestatin levels are associated with C-peptide and antiinsulin antibodies at the onset, whereas unacylated and acylated ghrelin levels are not predictive of long-term metabolic control in children with type 1 diabetes.Ghrelin secretion is altered at the onset and after the start of insulin therapy in children with type 1 diabetes. Contemporary regulation of acylated ghrelin (AG), unacylated ghrelin (UAG), and obestatin (OBST) remains undefined in this disease. It is unknown as to whether they could be good predictors of changes in glucose and metabolic control.
Flavia Prodam, Francesco Cadario, Simonetta Bellone, Letizia Trovato, Stefania Moia, Erica Pozzi, Silvia Savastio, Gianni Bona
2677 related Products with: Obestatin levels are associated with C-peptide and antiinsulin antibodies at the onset, whereas unacylated and acylated ghrelin levels are not predictive of long-term metabolic control in children with type 1 diabetes.0.1 mg100 μg0.1 mg100 μg1000 TESTS/0.65ml100ug Lyophilized1000 1000 tests100 μg100ul1 L.
#24127484 2013/10/14 To Up
Pathogenic CD4⁺ T cells recognizing an unstable peptide of insulin are directly recruited into islets bypassing local lymph nodes.In the nonobese diabetic mouse, a predominant component of the autoreactive CD4(+) T cell repertoire is directed against the B:9-23 segment of the insulin B chain. Previous studies established that the majority of insulin-reactive T cells specifically recognize a weak peptide-MHC binding register within the B:9-23 segment, that to the 12-20 register. These T cells are uniquely stimulated when the B:9-23 peptide, but not the insulin protein, is offered to antigen presenting cells (APCs). Here, we report on a T cell receptor (TCR) transgenic mouse (8F10) that offers important new insights into the biology of these unconventional T cells. Many of the 8F10 CD4(+) T cells escaped negative selection and were highly pathogenic. The T cells were directly recruited into islets of Langerhans, where they established contact with resident intra-islet APCs. Immunogenic insulin had to be presented in order for the T cells to localize and cause disease. These T cells bypassed an initial priming stage in the pancreatic lymph node thought to precede islet T cell entry. 8F10 T cells induced the production of antiinsulin antibodies and islets contained immunoglobulin (IgG) deposited on β cells and along the vessel walls.
James F Mohan, Boris Calderon, Mark S Anderson, Emil R Unanue
2449 related Products with: Pathogenic CD4⁺ T cells recognizing an unstable peptide of insulin are directly recruited into islets bypassing local lymph nodes.100ug/vial96 assays200ul1 mg100ul96 tests
#22854326 2012/07/31 To Up
Treatment of recurrent hypoglycemia with plasmapheresis and steroid in nondiabetic patient.We recently encountered a 35-year old man who suffered from frequent hypoglycemia. His blood test revealed the presence of high and suppressed level of insulin with supressed C-peptide levels, hypothalamic-pituitary axis was normal response in hypoglycemia and negative for anti-insulin antibody. Endocrinological and imaging data eliminated the possibility of insulinoma. His symptoms responded well to the therapy of prednisolone (60 mg/day) and plasmapheresis. We followed up the patient over the subsequent 6 months without remarkable lesions. He has had no further recurrences of hypoglycemia. We believe that the antiinsulin receptor antibody might have induced hypoglycemia in this patient.
Mustafa Kulaksızoglu, Mustafa Sait Gonen, Levent Kebapcilar, Fatih Sahin, Fatih Demirci, Ali Topcu
2913 related Products with: Treatment of recurrent hypoglycemia with plasmapheresis and steroid in nondiabetic patient.5mgInhibitor5 mg1.00 flask100ug Lyophilized 500 G100 μg50ul
#20455202 2010/05/07 To Up
Green tea epigallocatechin gallate inhibits insulin stimulation of adipocyte glucose uptake via the 67-kilodalton laminin receptor and AMP-activated protein kinase pathways.Insulin and (-)-epigallocatechin gallate (EGCG) are reported to regulate obesity and fat accumulation, respectively. This study investigated the pathways involved in EGCG modulation of insulin-stimulated glucose uptake in 3T3-L1 and C3H10T1/2 adipocytes. EGCG inhibited insulin stimulation of adipocyte glucose uptake in a dose- and time-dependent manner. The concentration of EGCG that decreased insulin-stimulated glucose uptake by 50-60% was approximately 5-10 µM for a period of 2 h. At 10 µM, EGCG and gallic acid were more effective than (-)-epicatechin, (-)-epigallocatechin, and (-)-epicatechin 3-gallate. We identified the EGCG receptor [also known as the 67-kDa laminin receptor (67LR)] in fat cells and extended the findings for this study to clarify whether EGCG-induced changes in insulin-stimulated glucose uptake in adipocytes could be mediated through the 67LR. Pretreatment of adipocytes with a 67LR antibody, but not normal rabbit immunoglobulin, prevented the effects of EGCG on insulin-increased glucose uptake. This suggests that the 67LR mediates the effect of EGCG on insulin-stimulated glucose uptake in adipocytes. Moreover, pretreatment with an AMP-activated protein kinase (AMPK) inhibitor, such as compound C, but not with a glutathione (GSH) activator, such as N-acetyl-L-cysteine (NAC), blocked the antiinsulin effect of EGCG on adipocyte glucose uptake. These data suggest that EGCG exerts its anti-insulin action on adipocyte glucose uptake via the AMPK, but not the GSH, pathway. The results of this study possibly support that EGCG mediates fat content.
Chi-Fen Hsieh, Yi-Wei Tsuei, Chi-Wei Liu, Chung-Cheng Kao, Li-Jane Shih, Low-Tone Ho, Liang-Yi Wu, Chi-Peng Wu, Pei-Hua Tsai, Hsin-Huei Chang, Hui-Chen Ku, Yung-Hsi Kao
1474 related Products with: Green tea epigallocatechin gallate inhibits insulin stimulation of adipocyte glucose uptake via the 67-kilodalton laminin receptor and AMP-activated protein kinase pathways.200ul50ug100 ug/vial100ul50ug100ug500 50 KU100ug100 μg0.1ml
#19444103 // To Up
Novel agents in development for pediatric sarcomas.The survival curves for many pediatric sarcomas have remained flat for the past 2 decades or more and novel therapeutics - those small molecule medicines that selectively inhibit specific signaling molecules - have been slow to enter into pediatric practice. The preclinical basis for their use is reviewed here.
Dennis P M Hughes300 units0.1ml (1mg/ml) 100 G250 mg 1 G 1 G 5 G500 MG
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#18258687 2008/02/07 To Up
Trefoil factor 3 stimulates human and rodent pancreatic islet beta-cell replication with retention of function.Both major forms of diabetes involve a decline in beta-cell mass, mediated by autoimmune destruction of insulin-producing cells in type 1 diabetes and by increased rates of apoptosis secondary to metabolic stress in type 2 diabetes. Methods for controlled expansion of beta-cell mass are currently not available but would have great potential utility for treatment of these diseases. In the current study, we demonstrate that overexpression of trefoil factor 3 (TFF3) in rat pancreatic islets results in a 4- to 5-fold increase in [(3)H]thymidine incorporation, with full retention of glucose-stimulated insulin secretion. This increase was almost exclusively due to stimulation of beta-cell replication, as demonstrated by studies of bromodeoxyuridine incorporation and co-immunofluorescence analysis with anti-bromodeoxyuridine and antiinsulin or antiglucagon antibodies. The proliferative effect of TFF3 required the presence of serum or 0.5 ng/ml epidermal growth factor. The ability of TFF3 overexpression to stimulate proliferation of rat islets in serum was abolished by the addition of epidermal growth factor receptor antagonist AG1478. Furthermore, TFF3-induced increases in [3H]thymidine incorporation in rat islets cultured in serum was blocked by overexpression of a dominant-negative Akt protein or treatment with triciribine, an Akt inhibitor. Finally, overexpression of TFF3 also caused a doubling of [3H]thymidine incorporation in human islets. In summary, our findings reveal a novel TFF3-mediated pathway for stimulation of beta-cell replication that could ultimately be exploited for expansion or preservation of islet beta-cell mass.
Patrick T Fueger, Jonathan C Schisler, Danhong Lu, Daniella A Babu, Raghavendra G Mirmira, Christopher B Newgard, Hans E Hohmeier
1984 related Products with: Trefoil factor 3 stimulates human and rodent pancreatic islet beta-cell replication with retention of function.2ug1.00 flask 100ul500ug96 wells (1 kit)30ug1 mg2ug0.1 mg0.1 mg2ug2ug
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#16998625 // To Up
Immunohistochemical and electron-microscopic observation of beta-cells in pancreatic islets of spontaneously diabetic Goto-Kakizaki rats.The Goto-Kakizaki (GK) rat offers a genetic model of type 2 diabetes and displays profoundly defective insulin secretion leading to basal hyperglycemia. This animal is widely used for studying type 2 diabetes. However, the morphological characteristics of the pancreatic islets of Langerhans in GK rats are not fully understood. The present study sought to clarify this issue using immunohistochemical and electron microscopic techniques. GK rats were killed at 7, 14, 21, and 35 weeks of age. Structural islet changes were not observed at 7 weeks old. At 14 and 21 weeks of age, GK rats displayed histopathological islet changes. The general shape of islets became irregular, and immunoreaction of beta-cells against antiinsulin appeared diffusely weakened. Electron microscopy revealed that the numbers of so-called beta-granules decreased and the numbers of immature granules increased. The Golgi apparatus of beta-cells was developed and the cisternae of rough endoplasmic reticulum were often dilated, indicating hyperfunction of the cells. However, at 35 weeks old, immunoreactivities of dispersed beta-cells into the exocrine portion recovered, and numbers of secretory granules increased again and features of the cell organelles did not display hyperfunction. These results suggest that insulin deficiency in GK rats is not caused by simple dysfunction and/or degeneration of beta-cells but rather by more complicated events within cells.
Kazuko Momose, Shin Nunomiya, Masanori Nakata, Toshihiko Yada, Motoshi Kikuchi, Takashi Yashiro
1451 related Products with: Immunohistochemical and electron-microscopic observation of beta-cells in pancreatic islets of spontaneously diabetic Goto-Kakizaki rats.96 tests 100ul1x10e7 cells100100ug100ug0.1 mg
#15550513 2004/11/18 To Up
Autocrine regulation of insulin secretion in human ejaculated spermatozoa.A striking feature of insulin expression is its almost complete restriction to beta-cells of the pancreatic islet in normal mammals. Here we show that insulin is expressed in and secreted from human ejaculated spermatozoa. Both insulin transcript and protein were detected. In addition, the large differences in insulin secretion, assessed by RIA, between noncapacitated and capacitated sperm suggest a role for insulin in capacitation. Insulin had an oscillatory secretory pattern involving glucose dose-dependent increases and significant decreases during the blockage of an insulin autocrine effect. It appears that the effect of glucose on the fertilizing ability of sperm is mediated by glucose metabolism through the pentose phosphate pathway. Then we evaluated the autocrine effect of sperm insulin on glucose metabolism by studying the activity of glucose-6-phosphate dehydrogenase, the key rate-limiting enzyme in the pentose phosphate pathway. The simultaneous decrease in both insulin release and glucose-6-phosphate dehydrogenase activity induced by blocking the autocrine insulin effect with three different procedures (blockage of insulin release by nifedipine, immune neutralization of the released insulin by antiinsulin serum, and blockage of an insulin intracellular effector such as phosphotidylinositol 3-kinase by wortmannin) strongly suggests a physiological role of sperm insulin on these two events. Insulin secretion by spermatozoa may provide an autocrine regulation of glucose metabolism based on their energetic needs independent of systemic insulin. In conclusion, these data open a new area of study in male reproduction.
Saveria Aquila, Mariaelena Gentile, Emilia Middea, Stefania Catalano, Sebastiano Andò
1252 related Products with: Autocrine regulation of insulin secretion in human ejaculated spermatozoa.5 mg25 mg10ug200 25 mg1 kit(96 Wells)100 mg100 μg100.00 ug1 g10 mg96T
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