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PMID |
Sentence |
1 |
1382963
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The combination of RA and IGF-I, which resulted in decreased cellular proliferation, was associated with the appearance of IGFBP-3 in the CM at levels far exceeding those seen with RA alone.
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2 |
1382963
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The effect of IGF-I on IGFBP-2 levels and the synergistic action of IGF-I and RA on IGFBP-3 levels in CM were blocked by alpha IR3, a monoclonal antibody to the human IGF-I receptor, indicating that these effects required signal transduction through the IGF-I receptor.
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3 |
1382963
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These results suggest that the action of RA and IGF-I in combination to increase IGFBP-3 protein in CM is principally translational or posttranslational.
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4 |
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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5 |
7694822
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We report here that in addition to its affects on IGFBP-2, insulin is involved in the regulation of IGFBP-3 expression.
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6 |
7694841
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This pattern of regulation appeared to be specific; serum levels of immunoreactive IGFBP-2 and -4 tended to rise in adrenalectomized animals, and levels of IGFBP-3 were not affected by either ADNX or corticosterone treatment.
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7 |
7510305
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We have previously shown that IGF-I administration increases IGFBP-1 and -2 and reduces IGFBP-3 in normal subjects.
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8 |
7512496
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Expression and secretion of IGFBP-3 were hormonally responsive and strongly correlated (r = 0.79; P < 0.001), with 2- to 3-fold stimulation by added insulin or IGF-I (both P < 0.05), but not by added GH alone.
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9 |
7512573
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In the present study we have 1) assessed how differences in insulin and GH status between obese patients with noninsulin-dependent diabetes mellitus (NIDDM) and healthy obese (OB) and nonobese (NOB) subjects are associated with different responses of insulin-like growth factors (IGFs) and IGF-binding proteins (IGFBPs) to fasting, and 2) determined whether the IGF-I response to fasting in healthy subjects is secondary to changes in IGFBP-3.
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10 |
7512573
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In conclusion, 1) differences in GH status and modulation of GH induction of IGF-I by insulin resistance could contribute to low basal IGF-I levels and lack of a IGF-I response to fasting in patients with NIDDM; and 2) the turnover rate of IGF-I in serum, which is largely determined by IGFBP-3, is not likely to be altered by short term fasting, suggesting that the decrease in serum IGF-I concentrations is a result of decreased IGF-I production.
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11 |
7513716
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Insulin-like growth factor-I (IGF-I) in serum is predominantly bound in a ternary complex, consisting of IGF peptide, IGF-binding protein-3 (IGFBP-3), and an acid-labile subunit, or a binary complex, consisting of IGF peptide and any of the six IGFBPs.
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12 |
7514513
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After each treatment period (4 weeks), serum profiles of GH, IGF-I, IGF binding proteins 1 and 3 (IGFBP-1 and IGFBP-3), glucose, insulin, non-esterified fatty acids (NEFA), glycerol, 3-hydroxybutyrate, alanine, lactate and glucagon were measured for 37 hours after GH injection (3 IU/m2 at 1900 hour).
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13 |
7516962
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IGFBP-1 concentrations did not significantly change during the infusion but those of IGFBP-3 increased from 1655 +/- 127 to 2197 +/- 334 micrograms/l (P = 0.002), despite a significant fall in GH concentrations from 10.7 +/- 2.6 to 4.1 +/- 1.1 mU/l (P = 0.007), suggesting that IGFBP-3 regulation is also IGF-I-dependent.
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14 |
7524886
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We have presently studied ternary complex formation between IGF, IGFBP-3, and acid labile subunit (ALS) to further assess if IGF-I bioavailability is increased in human fetal serum.
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15 |
7535696
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IGFBP-1 is antagonistic to the insulin-like and growth promoting effects of IGF-I, and IGFBP-3 holds IGFs in the circulation by associating with IGFs and an acid labile subunit to form a ternary complex.
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16 |
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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17 |
7530649
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Larger complexes (> 95 kDa) present in the nonacidified 150-kDa pool were not observed, consistent with the IGFBP-3 molecules in the flow-through and eluate having been complexed to an acid-labile subunit (ALS).
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18 |
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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19 |
7533772
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After rhIGF-I treatment, plasma IGF-I, IGF-binding protein-1 (IGFBP-1), and IGFBP-2 all increased significantly, whereas IGFBP-3 did not change.
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20 |
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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21 |
7536205
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Before insulin therapy, serum IGF-I, IGF-II, IGF-binding protein-3 (IGFBP-3), and GH-binding protein (GHBP) levels were significantly decreased, whereas IGFBP-1 and cortisol were significantly increased in diabetic children compared to those in an age-, sex-, and stage of puberty-matched control group.
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22 |
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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23 |
7543110
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These results suggest an important role of insulin in the regulation of IGFBP-3 protease activity.
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24 |
7543110
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Increased IGFBP-3 proteolysis in the sera of children with IDDM may serve to counteract the catabolic state induced by insulin deficiency.
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25 |
8796133
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The sum of IGF-I and IGF-II (expressed as nmol/l) correlated with IGFBP-3; r = 0.47 in controls and 0.60 in diabetics.
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26 |
8910817
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Increased IGFBP-3 protease activity has been shown in sera of children with IDDM as well as a decrease in this activity in response to insulin therapy.
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27 |
8910817
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We conclude that regulation of IGF-I and IGFBP-3 concentrations is disturbed in children with IDDM, in particular during adolescence.
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28 |
9388210
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Like IGFBP-7, an NH2-terminal fragment of IGFBP-3 (IGFBP-3((1-87))), also binds insulin with high affinity and blocks insulin action.
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29 |
11739083
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Insulin-like growth factor-binding protein (IGFBP)-3 contains a highly basic COOH-terminal heparin-binding region, the P3 region, which is thought to be important in the binding of IGFBP-3 to endothelial cells.
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30 |
11739083
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Substitution of the P3 region for the P4 region in IGFBP-4 (IGFBP-4(3)) increased the ability of the protease to digest IGFBP-4(3); substitution of the P4 region for the P3 region in IGFBP-3 (IGFBP-3(4)) decreased the digestion of IGFBP-3(4).
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31 |
11739083
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When 125I-labeled IGFBP-3 or 125I-IGFBP-4(3) was first bound to vascular endothelial cells, subsequent proteolysis by either plasmin or thrombin was substantially inhibited.
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32 |
12675639
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When compared with controls, diabetic patients (n = 58) showed reduced (P < 0.0005) levels of free and total IGFs, free plus dissociable IGF-I and IGFBP-3, whereas levels of IGFBP-1, IGFBP-1-bound IGF-I and IGFBP-2 were elevated.
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33 |
14527633
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Specifically, hyperinsulinemia elevates serum concentrations of free insulin-like growth factor-1 (IGF-1) and androgens, while simultaneously reducing insulin-like growth factor-binding protein 3 (IGFBP-3) and sex hormone-binding globulin (SHBG).
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34 |
14527633
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Since IGFBP-3 is a ligand for the nuclear retinoid X receptor alpha, insulin-mediated reductions in IGFBP-3 may also influence transcription of anti-proliferative genes normally activated by the body's endogenous retinoids.
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35 |
15935983
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Anti-sense IGFBP-3 oligo at 10 microg/mL significantly inhibited apoptosis induced by 100 ng/mL TNF-alpha, serum-free conditions, or high (25 mM) glucose.
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36 |
15935983
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Increased IGFBP-3 release associated with high ambient glucose or TNF-alpha was inhibited by pre-treatment with anti-sense oligo.
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37 |
15935983
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Under serum-free conditions, recombinant human IGFBP-3 blocked Akt phosphorylation at threonine 308 (pThr308), whereas anti-sense oligo treatment was associated with enhanced pThr308 activity.
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38 |
15935983
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In summary, these data support a novel mechanism for TNF-alpha-induced mesangial cell apoptosis mediated by IGFBP-3 and present regulation of pThr308 activity as a novel mechanism underlying IGFBP-3 action.
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39 |
15959422
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Maternal diabetes is associated with suppressed levels of IGFBP-1 in cord serum, whereas those of IGFBP-3 do not change markedly.
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40 |
16180585
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We have examined the basal and insulin-mediated phosphorylation of protein kinase B (PKB), protein kinase Czeta (PKCzeta), p70(S6k), mitogen-activated protein kinase (MAPK)/p90(rsk) pathway and the expression of IGFBP-3, -4, and -5 in mice selected for body weight gain (line C) and reduction (line L).
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41 |
16180585
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Protein level of IGFBP-3 in muscle of diabetic C-line mice was augmented by approx. 28% when compared to the control, whereas the expression of IGFBP-4 and -5 was not modified by STZ-diabetes.
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42 |
16549931
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Although this study does not exclude that high levels and/or prolonged exposure to IL-6 may induce IGFBP-3 proteolysis in sepsis or chronic inflammatory disease, it suggests that IL-6 released from exercising skeletal muscle is not directly involved in proteolysis of circulating IGFBP-3.
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43 |
16887362
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Similar but less significant relationships were observed for IGFBP-3, whose levels were also significantly and directly correlated with those of free IGF-I.
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44 |
17003344
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Marked, opposing, and independent physiological effects of IGF-I and IGFBP-3 through central mechanisms may have implications on potential strategies in specific modulation of peripheral insulin action.
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45 |
17011663
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Compared with diabetic patients without microalbuminuria (MA), MA diabetic patients display perturbed GH-IGF-IGFBP homeostasis, including increased circulating IGF-I and IGFBP-3 protease activity, increased excretion of bioactive GH, IGF-I, and IGFBP-3, but decreased circulating IGFBP-3 levels.
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46 |
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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47 |
17904401
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We did not find any significant association between IGF-I and glucose intolerance in this study and the association for IGFBP-3 was less clear.
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48 |
18566119
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In this study, we show that IRE-BP1 interacts with the insulin response sequence of the IGF-I, IGFBP-1, and IGFBP-3 genes using chromatin immunoprecipitation assay.
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49 |
19138973
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Treating these mice with EGCG also caused an increase in the serum level of IGFBP-3 while conversely decreasing the serum levels of IGF-I, insulin, triglyceride, cholesterol, and leptin.
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50 |
19324019
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Rosiglitazone-stimulated adiponectin protein synthesis in 3T3-L1 mouse adipocytes has been shown to be inhibited by IGFBP-3, which can be induced by hypoxia and the proinflammatory cytokine, TNF-alpha, two inhibitors of adiponectin transcription.
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51 |
19324019
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The present study demonstrates that IGFBP-3, the hypoxia-mimetic agent cobalt chloride, and TNF-alpha inhibit rosiglitazone-induced adiponectin transcription in mouse embryo fibroblasts that stably express PPAR-gamma2.
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52 |
19324019
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These results suggest that IGFBP-3 may mediate the inhibition of adiponectin transcription by hypoxia and TNF-alpha, and that IGFBP-3 binding to RXR-alpha may be required for the observed inhibition.
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53 |
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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54 |
20713685
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VAT-EC had enhanced expression of the cellular senescence markers, IGFBP3 and ?-H2AX, and decreased expression of SIRT1.
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55 |
19863750
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Total basal ghrelin was inversely related to the change in IGFBP-3.
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56 |
20926583
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Fasting blood glucose and insulin levels were significantly elevated in IGFBP-3(-/-) mice.
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57 |
20926583
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During hyperinsulinemic clamps, IGFBP-3(-/-) mice had increased basal hepatic glucose production, but after insulin stimulation, no differences in hepatic glucose production were observed.
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58 |
12574231
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An IGFBP-3 mutant, which binds IGFs normally but has a substituted mid-region domain, lost the ability to inhibit VEGF actions.
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59 |
15886488
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IGFBP-3 product correlated closely with peak IGF-I level (r = 0.85; p < 0.007).
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60 |
16275148
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Using the rat insulinoma RINm5F cell line, we report the first studies in insulin-secreting cells that IGFBP-3 selectively suppresses multiple, key intracellular phosphorelays.
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61 |
16275148
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By immunoblot, we demonstrate that G(56)G(80)G(81)-IGFBP-3 suppresses phosphorylation of c-raf-MEK-ERK pathway and p38 kinase in time-dependent and dose-dependent manners.
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62 |
18445667
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In chronic energy deficit, total and free IGF-I, IGFBP-6, and GHBP levels were lower, compared with euleptinemic controls; r-metHuLeptin administration had no major effect on GH pulsatility after 2 wk but increased total IGF-I levels and tended to increase free IGF-I and IGFBP-3 after 1 month.
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