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Study · In vitro (cells) · rat · 2000

2 results

Insulin-like growth factor (IGF)-I stimulates IGF-I and type 1 IGF receptor expression in cultured rat granulosa cells: autocrine regulation of the intrafollicular IGF-I system.

deMoura MD, Chamoun D, Resnick CE, Adashi EY

Endocrine1 Aug 2000Cited by 9 (Europe PMC)

Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: Publisher copyright. Results still quote short attributed sentences.

Results from this study2

2 results from studies that gave the peptide. No result from this study comes from people.

  1. 01LabIn vitro (cells)Mechanism

    Des (1-3) IGF-I increased IGF-I mRNA levels 2.6-fold in cultured rat granulosa cells.

    In plain wordsIn cells from rats, des (1-3) IGF-I increased the genetic message for IGF-I.

    Outcome
    IncreaseIGF-I mRNA
    Study

    ratn: not reported in source

    estrogen-primed rat granulosa cells
    Outcome group
    Receptor activity and mechanism · Reproductive and sexual health
    Studied dose
    Dose not stated · 72 hAs given in this study (rat).

    Measurements

    IGF-I mRNA increase
    2.6 fold
    des (1-3) IGF-I

    Source sentences

    Summary
    Treatment with insulin and des (1-3) IGF-I proved equally effective, producing 2.0- and 2.6-fold increases, respectively, thereby suggesting that the IGF-I effect may be mediated via the type 1 IGF receptor.
    3 context sentences
    Summary · context
    Treatment of cultured rat granulosa cells with IGF-I resulted in a significant 1.8-fold increase in the steady-state levels of IGF-I mRNA.
    Summary · context
    Granulosa cells, obtained by follicular puncture from 25-d-old estrogen-primed rats were cultured in polystyrene tubes for 72 h under serum-free conditions, in the absence or presence of the indicated agents.
    Summary · context
    At the conclusion of each experiment, media were discarded, and RNA was extracted and subjected to an RNase protection assay.
  2. 02LabIn vitro (cells)Mechanism

    Des (1-3) IGF-I increased type 1 IGF receptor expression in cultured rat granulosa cells.

    In plain wordsIn cells from rats, des (1-3) IGF-I increased expression of the type 1 IGF receptor.

    Outcome
    IncreaseType 1 IGF receptor expression
    Study

    ratn: not reported in source

    estrogen-primed rat granulosa cells
    Outcome group
    Receptor activity and mechanism · Reproductive and sexual health
    Studied dose
    Dose not stated · 72 hAs given in this study (rat).

    Source sentences

    Summary
    Similar results obtained for insulin and des (1-3) IGF-I thereby suggest that the ability of IGF-I to upregulate the expression of its own receptor is probably type 1 IGF receptor-mediated.
    3 context sentences
    Summary · context
    Treatment with IGF-I also resulted in a significant (p < 0.005) increase in type 1 IGF receptor expression (2.3-fold increase), the first significant effect being noted at the 30 ng/mL dose level.
    Summary · context
    Granulosa cells, obtained by follicular puncture from 25-d-old estrogen-primed rats were cultured in polystyrene tubes for 72 h under serum-free conditions, in the absence or presence of the indicated agents.
    Summary · context
    At the conclusion of each experiment, media were discarded, and RNA was extracted and subjected to an RNase protection assay.

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Version 3Current

    21 Oct 2026, 15:58 UTC

    Study results updated

  2. Version 2

    21 Oct 2026, 13:52 UTC

    Study data updated · source update from Europe PMC

  3. Version 1

    21 Oct 2026, 12:50 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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