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PMID |
Sentence |
1 |
21913804
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Since IGF-II activates the insulin receptor (INSR), we propose that the INSR signaling is also activated in this system.
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2 |
6448739
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In rats treated with insulin, blood glucose levels and glycosuria decreased, and serum somatomedin A returned to 108.3% +/- 11.7% of the initial values by the sixth day of treatment.
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3 |
2430989
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These findings raise the questions of whether maternal SMBP levels influence the amount of IGF-I available for the fetal-placental unit and whether IGF-II participates in glucose homeostasis in the fetus.
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4 |
2435221
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Both are mitogenic and IGF-II has more insulin-like effects than does SM-C/IGF-I.
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5 |
2644137
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This enzyme degraded 125I-labeled insulin-like growth factor I (IGF-I) more slowly than 125I-IGF-II and degraded IGF-II more slowly than 125I-insulin.
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6 |
2540178
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Insulin and insulin-like growth factors (IGF-I and IGF-II) in the presence and absence of GTP gamma S did not stimulate PIP2-PLC or PI-PLC in plasma membranes and cytosol preparations nor phosphoinositide breakdown in isolated human hepatocytes.
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7 |
2542108
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In competition experiments, IGF-I competed for binding more effectively than rat IGF-II or insulin.
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8 |
2542427
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IGF-I and IGF-II as well as the low molecular type of IGF binding protein (IGFPB) were determined in serum from 11 adolescents with insulin-dependent diabetes mellitus (IDDM) during a cross-over study with conventional and continuous subcutaneous insulin infusion (CIT and CSII) therapy.
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9 |
2542427
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The findings of elevated IGF-II and IGFBP levels and correlations between IGFBP and blood glucose concentration as well as IGF-II and HbA1c levels in adolescents with IDDM indicate that both IGF-II and IGFBP reflect a deranged metabolism caused by inadequate insulin administration.
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10 |
2407519
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IGF-II (200 ng/ml) also suppressed insulin release, but the effect was less pronounced than for IGF-I and was present at 16.7 mM glucose, but not at 7.8 mM glucose.
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11 |
2088457
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The influence of metabolic control (HbA1c), noradrenaline (NA) and insulin-like growth factors (IGF-I and IGF-II) on renal function and size was investigated in 11 insulin-dependent diabetes mellitus patients aged 11-17 years.
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12 |
1708099
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IGF-II did not stimulate tyrosine phosphorylation of its own receptor, but was 25% as active as IGF-I in stimulating phosphorylation of the IGF-I receptor.
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13 |
1708099
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These data indicate that the IGF-I receptor can be activated upon binding of IGF-I, and to a lesser extent IGF-II, in intact cells to mediate cellular events.
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14 |
1649393
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However, progestins also increased the secretion of IGF-II, a ligand for the IGF-I receptor.
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15 |
1719386
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The insulin-like growth factor-binding proteins (IGFBPs) are thought to determine the distribution of IGF-I and IGF-II between the blood and tissue compartments and to modulate their biological activities.
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16 |
1311795
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Of special interest, a newly identified exon (hE1) was shown to be predominantly expressed in the tumor by Northern blot analysis using leader exon-specific rat IGF-II complementary DNA (cDNA) probes.
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17 |
1386818
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IGF-I stimulated renin secretion in perifusions as early as 30 min, whereas IGF-II had no effect.
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18 |
1383692
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The insulin-like growth factor-binding proteins (IGFBPs) are a family of proteins that specifically bind IGF-I and IGF-II, determine their bioavailability to tissues, and modulate their actions in target tissues.
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19 |
1439105
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Little is known about the physiological significance of IGF-II, whose concentration, at variance with IGF-I, is not increased in acromegalic subjects.
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20 |
7683512
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The tentative conclusion would therefore be that free IGF-II is a major regulator of circulating IGFBP-2.
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21 |
7683533
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Enzymatic deglycosylation does not alter the high affinity of IGFBP-6 for IGF-II (Ka 4.4 +/- 2.2 x 10(11) M-1) or its preference for IGF-II over IGF-I.
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22 |
7683646
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Thus, the determinants of IGF-II binding to IGFBPs partially overlap those for the IGF-II/mannose 6-phosphate receptor and overlap those for the IGF-I receptor to a lesser extent.
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23 |
7683646
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IGFBP-1 and IGFBP-6 are most sensitive to changes in IGF-II structure, although IGFBP-1 binds IGF-I and IGF-II with equal affinity, whereas IGFBP-6 has a marked preferential binding affinity for IGF-II.
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24 |
8390684
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These results suggest that underexpression, deletion, or mutation of WT1 may result in increased expression of the IGF-IR, whose activation by IGF-II may be an important aspect of the biology of Wilms tumor.
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25 |
7688368
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The insulin-like growth factor-binding proteins (IGFBPs) are a family of six proteins that modulate the biological activity of IGF-I and IGF-II and determine their bioavailability to tissues.
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26 |
7504689
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IGF-I and IGFBP-3 were increased 10- and 13-fold in rubeosis (P << 0.01) compared with no ischemia (n = 10), while IGF-II and IGFBP-2 were elevated 2.7- and 4.3-fold (P < 0.01).
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27 |
7504689
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Vitreous from patients with proliferative diabetic retinopathy but without rubeosis (n = 16) contained 2.5- and 2.2-fold elevated levels of IGF-I and of IGFBP-2 (P < 0.05), while IGF-II and IGFBP-3 were increased 1.4- and 1.6-fold, which was not significant.
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28 |
7514206
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More than 95% of IGF-I circulates bound to binding proteins (IGFBPs); of these IGFBP-1 is of particular interest as it is inversely regulated by insulin and is thought to inhibit the action of IGF-I and IGF-II.
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29 |
8010960
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Binding of IGF-II was approx. 25% of that of insulin at 1 nM concentrations of both hormones.
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30 |
8010960
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In order to explore which receptor mediated the IGF-II effect, we compared glucose uptake induced by IGF-II and two IGF-II analogues: [Leu27]IGF-II, with high affinity for the IGF-II/Man 6-P receptor but markedly reduced affinity for the IGF-I and insulin receptors, and [Arg54,Arg55]IGF-II was similar to that of IGF-II, whereas [Leu27]IGF-II had a very diminished effect.
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31 |
8039596
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Of these growth factors, IGF-I was the most potent, with a significant effect at 0.6 nM and maximal effects at 6.0 nM, followed by IGF-II and insulin.
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32 |
7525263
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Insulin-like growth factor-binding protein-6 (IGFBP-6) is an O-linked glycoprotein that binds insulin-like growth factor-II (IGF-II) with marked preferential affinity over IGF-I.
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33 |
7532054
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IGFBP-2 levels were increased 6 to 7-fold following incubation with IGF-I, IGF-II or insulin for 48 h.
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34 |
7530649
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A 150-kDa pool, isolated after neutral Sephadex G-200 gel filtration of adult rat serum, bound IGF-II with approximately 80-fold greater affinity than IGF-I, but did not contain immunoprecipitable IGF-II/mannose-6-phosphate receptors, which bind IGF-II with the same preferential affinity.
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35 |
7530649
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The acid eluate and the acid-stripped flow-through predominantly formed 50-kDa complexes with [125I]IGF-II when affinity-cross-linked and examined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis; these complexes were precipitated by antibodies to rat IGFBP-3.
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36 |
7530649
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We conclude that the 150-kDa fraction of adult rat serum includes 1) ternary complexes of intact IGFBP-3 (which binds IGF-I and IGF-II with similar affinity), endogenous IGF-I, and the ALS; and 2) binary complexes of proteolytically nicked IGFBP-3 and ALS that bind IGF-II preferentially.
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37 |
7536202
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In the treated diabetics IGF-I and IGF-II were reduced; IGFBP-2 (only in prepubertal subjects) and IGFBP-3 were increased.
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38 |
7536205
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Improvement in glycemic control, as determined by a change in hemoglobin-A1c, correlated positively with improvement in IGF-I, IGF-II, IGFBP-3, GHBP, and weight gain after 1 month of insulin therapy.
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39 |
8927024
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We demonstrated that in rat adipocytes both acute insulin effects, e.g. stimulation of IGF-II and transferrin binding and a chronic effect, insulin receptor downregulation, were stimulated by vanadate.
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40 |
8796133
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Insulin-dependent diabetes mellitus is not associated with any significant changes in IGF-II levels during puberty.
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41 |
8796133
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The binding of IGFBP-3 for both IGF-I and IGF-II is unaltered by insulin-dependent diabetes mellitus.
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42 |
9369450
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The insulin-like growth factor (IGF) binding proteins (IGFBPs) are a family of proteins that bind IGF-I and IGF-II and modulate their biological activities.
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43 |
11134364
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Under basal conditions, human decidualized endometrium produces both non-phosphorylated (np) and phosphorylated (p) isoforms of IGFBP-1; however, in the presence of IGF-II, which is a trophoblast secretory product, npIGFBP-1 was preferentially produced.
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44 |
11147788
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Allelic variation in the size of the insulin (INS) variable number tandem repeat (VNTR) correlates with the expression of both INS in the pancreas and thymus and IGF2 (the gene downstream of INS) in the placenta.
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45 |
11855150
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IGF2 is expressed only in the paternal allele and, therefore, is considered a candidate gene for IDDM2 transmission because of its important autocrine/paracrine effects on the thymus, lymphocytes and pancreas.
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46 |
12675960
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Analysis by quintiles of nutrient intake showed a significant increase in circulating IGF-I concentration with increasing dietary fat intake (F for trend=3.9, ), saturated fat intake and for protein intake There was also a significant increase in IGF-II by quintiles of dietary protein intake There was a trend for increasing IGF-I with increasing energy intake.
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47 |
12604504
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Addition of IGFBPs dose dependently reduced the KIRA signal, whereas addition of IGF-II to preformed complexes (1:1 molar ratio) of IGF-I and IGFBP dose dependently increased IGF-I bioactivity by displacement of bound IGF-I.
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48 |
15914054
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IGFBP-6 inhibits growth of a number of IGF-II-dependent cancers, including rhabdomyosarcoma, neuroblastoma and colon cancer.
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49 |
15914054
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Although the major action of IGFBP-6 appears to be inhibition of IGF-II actions, a number of studies suggest that it may also have IGF-independent actions.
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50 |
15914054
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Both the N-terminal and C-terminal domains of IGFBP-6 contribute to high affinity IGF binding, and the C-terminal domain appears to confer its IGF-II specificity.
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51 |
16485043
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We show that the mutant FoxO1 transgene prevents beta cell replication in 2 models of beta cell hyperplasia, 1 due to peripheral insulin resistance (Insulin receptor transgenic knockouts) and 1 due to ectopic local expression of IGF2 (Elastase-IGF2 transgenics), without affecting insulin secretion.
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52 |
17413842
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Several genes in this imprinted cluster encode proteins involved in growth regulation, e.g. the paternally expressed IGF2 and the maternally expressed cell-cycle regulator cyclin dependent kinase inhibitor, CDKN1C.
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53 |
17479439
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Coincubation of bovine adrenocortical cells with purified IGFBP-1 (30 nM) induced a time--and dose-dependent potentiating effect (38+/-2%) on IGF-I-stimulated (6.5 nM) cortisol-secretion, wheras the IGF-II induced steroidogenic effect was inhibited (40+/-3%) by IGFBP-1.
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54 |
17479439
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In order to evaluate the influence of different phosphorylation states of IGFBP-1 on the steroidogenic effect of IGF-I and IGF-II and on the affinity to IGFs, a highly phosphorylated (pIGFBP-1) and a dephosphorylated isoform (dIGFBP-1) of IGFBP-1 have been separated by anion exchange chromatography for further incubation experiments and binding studies.
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55 |
17479439
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IN CONCLUSION, these results demonstrate that in bovine adrenocortical cells IGFBP-1 time- and dose-dependently inhibits the steroidogenic effect of IGF-II and stimulates the effect of IGF-I.
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56 |
17479439
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The mechanisms by which IGFBP-1 divergently regulates the steroidogenic effect of IGF-I and IGF-II remain unclear at present and further investigation is necessary to elucidate the mechanisms by which IGFBP-1 modulates IGF action in the adult adrenal gland.
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57 |
17426090
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Administration of rhIGF-I/rhIGFBP-3 resulted in a redistribution of the amount of IGF-I and IGF-II that bound to IGFBP-3.
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58 |
19846739
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In addition, insulin increased IGFBP-2 and GH and decreased IGFBP-1 and -4 but did not alter total IGF-I, IGF-II, or IGFBP-3 levels.
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59 |
20929508
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Hyperglycemia increases insulin-like growth factors (IGFs), especially IGF2, which acts via the IGF1 receptor present on renal cells.
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60 |
20929508
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The results suggest the following molecular etiopathophysiology of DN: (i) hyperglycemia upregulates IGF2, which initiates PTEN, a regulator of IGF2 signaling; (ii) loss of this IGF2-PTEN feedback loop causes changes that are characteristic of DN; and (iii) lowered expression of the repair modulator SPARC results in the development and/or progression of DN.
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61 |
20966046
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In vivo depletion of SRA or p68 reduced CTCF-mediated insulator activity at the IGF2/H19 ICR, increased levels of IGF2 expression, and increased interactions between the endodermal enhancer and IGF2 promoter. p68/SRA also interacts with members of the cohesin complex.
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62 |
21047779
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Here, we demonstrate that deletion of both Gsk-3? and Gsk-3? in mouse embryonic stem cells results in reduced expression of the de novo DNA methyltransferase Dnmt3a2, causing misexpression of the imprinted genes Igf2, H19, and Igf2r and hypomethylation of their corresponding imprinted control regions.
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63 |
20663687
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In fact, increased insulin, IGF-I and IGF-II levels are associated with tumor growth in vitro, in animal models, and in epidemiological studies in humans.
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64 |
20663687
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In this paper, we discuss the roles of insulin, IGF-I and IGF-II, their interaction with the insulin receptor (IR) and IGF-I receptor (IGF-IR), and their signaling pathways and regulation as these pertain to tumor growth.
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65 |
19029226
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Despite the increase in circulating leptin levels, there was no change in IGF1, IGF2, free IGF1, or IGF-binding proteins during the 2-month treatment period.
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66 |
21486933
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Decreased IGF-I is associated with reduced activating phosphorylation of the type 1 IGF receptor (pIGF-IR) in the kidney, whereas reduced IGF-II is associated with decreased phosphorylation of the insulin receptor (pIR) in the lung.
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67 |
21576258
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We describe the ability of mammalian target of rapamycin (mTOR) to regulate the cap-independent translation of IGF2 mRNA through phosphorylation of IMP2, an oncofetal RNA-binding protein.
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68 |
21576258
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Double phosphorylation promotes IMP2 binding to the IGF2 leader 3 mRNA 5' untranslated region, and the translational initiation of this mRNA through eIF-4E- and 5' cap-independent internal ribosomal entry.
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69 |
10839546
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Although these neighbouring genes share an enhancer, H19 is expressed only from the maternal allele, and Igf2 only from the paternally inherited allele.
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70 |
20007505
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The imprinted expression of the IGF2 and H19 genes is controlled by the imprinting control region 1 (ICR1) located at chromosome 11p15.5.
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