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Study · Randomized controlled trial · n = 24 · 1998

23 results

Two-month treatment of obese subjects with the oral growth hormone (GH) secretagogue MK-677 increases GH secretion, fat-free mass, and energy expenditure.

Svensson J, Lönn L, Jansson JO, Murphy G, Wyss D, Krupa D, Cerchio K, Polvino W, Gertz B, Boseaus I, Sjöström L, Bengtsson BA

The Journal of clinical endocrinology and metabolism1 Feb 1998Cited by 98 (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 study23

23 results from studies that gave the peptide. 23 results from people.

  1. 01HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 increased IGF-I compared with placebo.

    In plain wordsIn obese males, MK‑677 increased IGF-I compared with placebo.

    Outcome
    IncreaseIGF-I
    Study

    n = 24

    Comparator
    Placebo
    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Measurements

    IGF-I increase
    ≈ 40%
    MK-677 vs placebo, 8 weeks
    P value for serum IGF-I increase
    < 0.001 unitless
    MK-677 vs. placebo

    Source sentences

    Summary
    Serum insulin-like growth factor I (IGF-I) increased approximately 40% with MK-677 treatment (P < 0.001 vs. placebo).
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  2. 02HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 increased IGF-binding protein-3 compared with placebo.

    In plain wordsIn obese males, MK‑677 increased IGF-binding protein-3 compared with placebo.

    Outcome
    IncreaseIGF-binding protein-3
    Study

    n = 24

    Comparator
    Placebo
    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Measurements

    P value for serum IGF-binding protein-3 increase
    ≤ 0.001 unitless
    MK-677 vs. placebo

    Source sentences

    Summary
    Serum IGF-binding protein-3 was also significantly increased (P < or = 0.001 vs. placebo).
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  3. 03HumanRandomized controlled trialEfficacy outcome

    In obese males, the initial MK‑677 dose significantly increased peak GH.

    In plain wordsIn obese males, the initial MK‑677 dose significantly increased peak growth hormone.

    Outcome
    IncreaseInitial GH peak
    Study

    n = 24

    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · initial doseAs given in this study (human).

    Source sentences

    Summary
    GH and PRL (peak and area under the curve values) were significantly increased after the initial dose of MK-677.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  4. 04HumanRandomized controlled trialEfficacy outcome

    In obese males, the initial MK‑677 dose significantly increased GH area under the curve.

    In plain wordsIn obese males, the initial MK‑677 dose significantly increased growth hormone area under the curve.

    Outcome
    IncreaseInitial GH area under the curve
    Study

    n = 24

    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · initial doseAs given in this study (human).

    Source sentences

    Summary
    GH and PRL (peak and area under the curve values) were significantly increased after the initial dose of MK-677.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  5. 05HumanRandomized controlled trialEfficacy outcome

    In obese males, the initial MK‑677 dose significantly increased peak PRL.

    In plain wordsIn obese males, the initial MK‑677 dose significantly increased peak prolactin.

    Outcome
    IncreaseInitial PRL peak
    Study

    n = 24

    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · initial doseAs given in this study (human).

    Source sentences

    Summary
    GH and PRL (peak and area under the curve values) were significantly increased after the initial dose of MK-677.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  6. 06HumanRandomized controlled trialEfficacy outcome

    In obese males, the initial MK‑677 dose significantly increased PRL area under the curve.

    In plain wordsIn obese males, the initial MK‑677 dose significantly increased prolactin area under the curve.

    Outcome
    IncreaseInitial PRL area under the curve
    Study

    n = 24

    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · initial doseAs given in this study (human).

    Source sentences

    Summary
    GH and PRL (peak and area under the curve values) were significantly increased after the initial dose of MK-677.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  7. 07HumanRandomized controlled trialEfficacy outcome

    In obese males, increased peak GH persisted during repeated MK‑677 treatment.

    In plain wordsIn obese males, increased peak growth hormone persisted during repeated MK‑677 treatment.

    Outcome
    IncreasePersistent GH peak
    Study

    n = 24

    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Significant increases, with the exception of peak PRL, persisted at 2 and 8 weeks of treatment.
    3 context sentences
    Summary · context
    GH and PRL (peak and area under the curve values) were significantly increased after the initial dose of MK-677.
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  8. 08HumanRandomized controlled trialEfficacy outcome

    In obese males, increased GH area under the curve persisted during repeated MK‑677 treatment.

    In plain wordsIn obese males, increased growth hormone area under the curve persisted during repeated MK‑677 treatment.

    Outcome
    IncreasePersistent GH area under the curve
    Study

    n = 24

    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Significant increases, with the exception of peak PRL, persisted at 2 and 8 weeks of treatment.
    3 context sentences
    Summary · context
    GH and PRL (peak and area under the curve values) were significantly increased after the initial dose of MK-677.
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  9. 09HumanRandomized controlled trialEfficacy outcome

    In obese males, increased PRL area under the curve persisted during repeated MK‑677 treatment.

    In plain wordsIn obese males, increased prolactin area under the curve persisted during repeated MK‑677 treatment.

    Outcome
    IncreasePersistent PRL area under the curve
    Study

    n = 24

    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Significant increases, with the exception of peak PRL, persisted at 2 and 8 weeks of treatment.
    3 context sentences
    Summary · context
    GH and PRL (peak and area under the curve values) were significantly increased after the initial dose of MK-677.
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  10. 10HumanRandomized controlled trialEfficacy outcome

    In obese males, the significant peak PRL increase did not persist during repeated MK‑677 treatment.

    In plain wordsIn obese males, the significant peak prolactin increase did not persist during repeated MK‑677 treatment.

    Outcome
    No significant changePersistent PRL peak
    Study

    n = 24

    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Significant increases, with the exception of peak PRL, persisted at 2 and 8 weeks of treatment.
    3 context sentences
    Summary · context
    GH and PRL (peak and area under the curve values) were significantly increased after the initial dose of MK-677.
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  11. 11HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 did not increase serum cortisol compared with placebo.

    In plain wordsIn obese males, MK‑677 did not increase serum cortisol compared with placebo.

    Outcome
    No significant changeSerum cortisol
    Study

    n = 24

    Comparator
    Placebo
    Outcome group
    Stress hormones · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Serum and urinary concentrations of cortisol were not increased at 2 and 8 weeks (P = NS, vs. placebo).
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  12. 12HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 did not increase urinary cortisol compared with placebo.

    In plain wordsIn obese males, MK‑677 did not increase urinary cortisol compared with placebo.

    Outcome
    No significant changeUrinary cortisol
    Study

    n = 24

    Comparator
    Placebo
    Outcome group
    Stress hormones · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Serum and urinary concentrations of cortisol were not increased at 2 and 8 weeks (P = NS, vs. placebo).
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  13. 13HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 increased fat-free mass measured by dual energy x-ray absorptiometry.

    In plain wordsIn obese males, MK‑677 increased fat-free mass measured by absorptiometry.

    Outcome
    IncreaseFat-free mass by absorptiometry
    Study

    n = 24

    Outcome group
    Body composition · Metabolic and weight
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Measurements

    P value for fat-free mass increase by dual energy x-ray absorptiometry
    < 0.01 unitless
    MK-677 treatment group; comparison not stated

    Source sentences

    Summary
    Fat-free mass increased significantly in the MK-677 treatment group when determined with dual energy x-ray absorptiometry (P < 0.01) or using a four-compartment model (P < 0.05).
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  14. 14HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 increased fat-free mass measured by a four-compartment model.

    In plain wordsIn obese males, MK‑677 increased fat-free mass measured by a four-compartment model.

    Outcome
    IncreaseFat-free mass by four-compartment model
    Study

    n = 24

    Outcome group
    Body composition · Metabolic and weight
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Measurements

    P value for fat-free mass increase by four-compartment model
    < 0.05 unitless
    MK-677 treatment group; comparison not stated

    Source sentences

    Summary
    Fat-free mass increased significantly in the MK-677 treatment group when determined with dual energy x-ray absorptiometry (P < 0.01) or using a four-compartment model (P < 0.05).
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  15. 15HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 did not significantly change total fat.

    In plain wordsIn obese males, MK‑677 did not significantly change total fat.

    Outcome
    No significant changeTotal fat
    Study

    n = 24

    Outcome group
    Body composition · Metabolic and weight
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Total and visceral fat were not significantly changed with active therapy.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  16. 16HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 did not significantly change visceral fat.

    In plain wordsIn obese males, MK‑677 did not significantly change visceral fat.

    Outcome
    No significant changeVisceral fat
    Study

    n = 24

    Outcome group
    Body composition · Metabolic and weight
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Total and visceral fat were not significantly changed with active therapy.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  17. 17HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 significantly increased basal metabolic rate at 2 weeks.

    In plain wordsIn obese males, MK‑677 significantly increased basal metabolic rate at 2 weeks.

    Outcome
    IncreaseBasal metabolic rate at 2 weeks
    Study

    n = 24

    Outcome group
    Energy expenditure and thermogenesis · Metabolic and weight
    Studied dose
    25 mg daily · oral · 2 weeksAs given in this study (human).

    Measurements

    P value for basal metabolic rate increase at 2 weeks
    0.01 unitless
    MK-677 treatment, 2 weeks; comparison not stated

    Source sentences

    Summary
    The basal metabolic rate was significantly increased at 2 weeks of MK-677 treatment (P = 0.01) but not at 8 weeks (P = 0.1).
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  18. 18HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 did not significantly increase basal metabolic rate at 8 weeks.

    In plain wordsIn obese males, MK‑677 did not significantly increase basal metabolic rate at 8 weeks.

    Outcome
    No significant changeBasal metabolic rate at 8 weeks
    Study

    n = 24

    Outcome group
    Energy expenditure and thermogenesis · Metabolic and weight
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Measurements

    P value for basal metabolic rate increase at 8 weeks
    0.1 unitless
    MK-677 treatment, 8 weeks; comparison not stated

    Source sentences

    Summary
    The basal metabolic rate was significantly increased at 2 weeks of MK-677 treatment (P = 0.01) but not at 8 weeks (P = 0.1).
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  19. 19HumanRandomized controlled trialEfficacy outcome

    In obese males, fasting glucose was unchanged during MK‑677 treatment.

    In plain wordsIn obese males, fasting glucose was unchanged during MK‑677 treatment.

    Outcome
    No significant changeFasting glucose
    Study

    n = 24

    Outcome group
    Glycemic control · Metabolic and weight
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Fasting concentrations of glucose and insulin were unchanged, whereas an oral glucose tolerance test showed impairment of glucose homeostasis at 2 and 8 weeks.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  20. 20HumanRandomized controlled trialEfficacy outcome

    In obese males, fasting insulin was unchanged during MK‑677 treatment.

    In plain wordsIn obese males, fasting insulin was unchanged during MK‑677 treatment.

    Outcome
    No significant changeFasting insulin
    Study

    n = 24

    Outcome group
    Glycemic control · Metabolic and weight
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Fasting concentrations of glucose and insulin were unchanged, whereas an oral glucose tolerance test showed impairment of glucose homeostasis at 2 and 8 weeks.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  21. 21HumanRandomized controlled trialEfficacy outcome

    In obese males, MK‑677 impaired glucose homeostasis during oral glucose tolerance testing.

    In plain wordsIn obese males, MK‑677 impaired glucose control during oral glucose tolerance testing.

    Outcome
    DecreaseOral glucose tolerance
    Study

    n = 24

    Outcome group
    Glycemic control · Metabolic and weight
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    Fasting concentrations of glucose and insulin were unchanged, whereas an oral glucose tolerance test showed impairment of glucose homeostasis at 2 and 8 weeks.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  22. 22HumanRandomized controlled trialEfficacy outcome

    In obese males, GH increases were smaller after multiple MK‑677 doses than after the initial dose.

    In plain wordsIn obese males, growth hormone increases were smaller after multiple MK‑677 doses than after the initial dose.

    Outcome
    DecreaseGH response attenuation
    Study

    n = 12

    Comparator
    Initial MK-677 dose
    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    The increases in GH and PRL after the initial dose were significantly greater than the increase seen after multiple doses.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.
  23. 23HumanRandomized controlled trialEfficacy outcome

    In obese males, PRL increases were smaller after multiple MK‑677 doses than after the initial dose.

    In plain wordsIn obese males, prolactin increases were smaller after multiple MK‑677 doses than after the initial dose.

    Outcome
    DecreasePRL response attenuation
    Study

    n = 12

    Comparator
    Initial MK-677 dose
    Outcome group
    Growth hormone and IGF-1 · Endocrine and hormones
    Studied dose
    25 mg daily · oral · 8 weeksAs given in this study (human).

    Source sentences

    Summary
    The increases in GH and PRL after the initial dose were significantly greater than the increase seen after multiple doses.
    2 context sentences
    Summary · context
    The study was randomized, double blind, parallel, and placebo controlled.
    Summary · context
    Twenty-four obese males, aged 18-50 yr, with body mass indexes greater than 30 kg/m2 and waist/hip ratios greater than 0.95, were treated with MK-677 25 mg (n = 12) or placebo (n = 12) daily for 8 weeks.

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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 2Current

    14 Oct 2026, 05:02 UTC

    Study results updated

  2. Version 1

    14 Oct 2026, 01:46 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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