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AcromegalyIpoProAcroNCT05298891

Hypoproteic Diet in Acromegaly

A study testing Usual clinical practice + hypoproteic diet in people with Acromegaly, run by Azienda Ospedaliero Universitaria Maggiore della Carita at 1 site in Italy.

Suspended

Paused. Enrolment is on hold for now and may resume.

Official record
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Trial summary

Since protein and AAs are master regulator of GH and IGF-I secretion, we hypothesized that a low protein diet could reduce GH and IGF-I levels in acromegalic patients in addition to conventional therapy. Read more about this study

Who is it for?
Ages 18 to 65 years
Conditions the study is for
Acromegaly
What is being tested?
Usual clinical practice + hypoproteic diet
Could I receive a placebo?
No, everyone receives an active treatment
How many people
12 participants
Where
1 siteItaly
Study dates
1 Dec 2026to 1 Mar 2029
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 65 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age 18/65
  • Diagnosis of Acromegaly
  • In therapy with somatostatin analogues

Who cannot join

  • pregnancy or lactation
  • alchool or drugs abuse
  • cancer
  • Hematological diseases

Trial locations and contacts

1 site in 1 country.

Italy1 site
  • : Italy Pediatric Endocrine Service of AOU Maggiore della Carità of Novara; SCDU of Pediatrics, Department of Health Sciences, University of Eastern Piedmont

    Novara, Italy, 28100

Other trials in Italy

About this study

Official title: Deciphering the Role of a Low Protein Diet in Disease Control in Acromegalic Patients

Since protein and AAs are master regulator of GH and IGF-I secretion, we hypothesized that a low protein diet could reduce GH and IGF-I levels in acromegalic patients in addition to conventional therapy. Furthermore, we aim to explore metabolomic, microbiota, and micro-vesicle fingerprints of GH hypersecretion during conventional therapy and after a low protein diet

Read the detailed description

Nutrients are crucial modifiers of the GH/IGF-I axis. In particular, a close cross-talk between proteins and amino acids (AAs) and GH/IGF-I secretion exists.

Both AAs and proteins affect GH secretion. AAs stimulate GH secretion upon oral administration, with different potency among studies, being the combination of arginine and lysine the most powerful. Soy proteins also stimulate GH secretion when ingested either as hydrolysed proteins or free AAs. Furthermore, the acute GH response to AAs ingestion may be influenced by the daily amount of dietary protein/AAs consumption: diets high in proteins apparently increase basal GH levels.

AAs and proteins have a positive effect on IGF-I secretion as well. In general, high levels of proteins, especially animal and dairy proteins, and consumption of branched chain amino acids (BCAAs) increase serum IGF-I levels.

Considering pathological GH conditions, metabolomic analysis of acromegalic patients suggests that the main metabolic fingerprint of GH hypersecretion is a reduction in BCAAs, related to the disease activity. Moreover, there is evidence that GH, rather than IGF-I, is the main mediator of such metabolic fingerprint, which may be related to increased uptake of BCAAs by the muscles, increased gluconeogenesis, and raised consumption of BCAAs.

Thus, in acromegaly, a tailored diet is a further strategy that may contribute to blunt GH/IGF-I secretion. Indeed, some authors recently suggested that "personalized" or "precision" nutrition in some conditions and diseases could have an impact on their phenotype, combining dietary recommendations with individual's genetic makeup, metabolic and microbiome characteristics, and environment. However, studies on precision nutrition in acromegaly are still in a neonatal era.

Conditions
Acromegaly
Being tested
Usual clinical practice + hypoproteic diet
Medical subject headings
Acromegaly

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Usual clinical practice + hypoproteic dietOther

    Diet will be composed by:

    • energy equal to daily energy expenditure (estimated by indirect calorimetry * physical activity factor)
    • fats 28-35%
    • carbohydrates 50-60%
    • proteins 0,7-0,8g/kg of body weight 10-13% Diet will be given to the patient after the first visit and the study will start once the patient begins the diet.
Study groups in NCT05298891
Study groupRoleWhat they receive
Acromegalic adult in therapy with somatostatin analoguesExperimentalPatients will continue the usual medical outpatient visits cadency and will keep the same pharmacological therapy throughout the whole duration of the study. Drugs have to include somatostatin analogues. At the same time, patients will be trained by an expert dietician in the habit of an isocaloric and hypoproteic diet and will come back at 2,4,6 and 8 weeks after T0 for all the necessary study assessments and compliance checking.
Receives: Other: Usual clinical practice + hypoproteic diet

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in disease related hormones

    Variation of GH, IGF-1, IGFBP1, IGFBP3 hormones

    Measured: Change from Baseline GH, IGF-1, IGFBP1, IGFBP3 blood levels at 15 days, 30 days, 45 days, 60 days

Secondary outcomes (16)
  1. Change in weight

    Variation of body weight assessed through body mass index change (BMI)(kg/m2)

    Measured: Change from Baseline BMI at 15 days, 30 days, 45 days, 60 days

  2. Change in body circumferences

    Variation of body circumferences (waist, hips)

    Measured: Change from Baseline circumferences at 15 days, 30 days, 45 dyas, 60 days

  3. Change in metabolic control

    Change of cardio-metabolic risk factors: lipid profile

    Measured: Change from Baseline lipid profile at 15 days, 30 days, 45 days, 60 days

  4. Change in metabolic control

    Change of cardio-metabolic risk factors: insulin resistance (HOMA-IR)

    Measured: Change from Baseline lipid profile at 60 days

  5. Change in kidney profile

    Variation of serum creatinin

    Measured: Change from Baseline Serum Creatinin at 15 days, 30 days, 45 days, 60 days

  6. Change in liver profile

    Variation of liver markers(AST, ALT, GGT)

    Measured: Change from Baseline Serum Creatinin at 15 days, 30 days, 45 days, 60 days

  7. Change in uric acid

    Variation of uric acid in blood through enzymatic determination

    Measured: Change from Baseline uric acid in blood at 15 days, 30 days, 45 days, 60 days

  8. Change in body composition

    Change of body composition (fat mass %) (BIVA)

    Measured: Change from Baseline fat mass% at 60 days

  9. Change in body composition

    Change of body composition (fat mass %) (DXA)

    Measured: Change from Baseline fat mass% at 60 days

  10. Change in blood count

    Variation of blood count

    Measured: Change from Baseline blood count at 15 days, 30 days, 45 days, 60 days

  11. Change in microbiota

    Variation of prevalence of microbiota phyla through DNA sequencing of stools

    Measured: Change from Baseline of prevalence of microbiota phyla at 15, 30 days, 45 days, 60 days

  12. Change in omics profile

    Variation of lipidomic profile of stools through liquid and gas chromatography

    Measured: Change from Baseline omic profile of stools at 15, 30 days, 45 days, 60 days

  13. Change in omics profile

    Variation of proteomic profile of stools through liquid and gas chromatography

    Measured: Change from Baseline omic profile of stools at 15, 30 days, 45 days, 60 days

  14. Change in microvesicles

    Variation of urinary microvesicles levels

    Measured: Change from Baseline microvesicles levels at 15, 30 days, 45 days, 60 days

  15. Change in microvesicles

    Variation of serum microvesicles levels

    Measured: Change from Baseline microvesicles levels s at 15, 30 days, 45 days, 60 days

  16. Change in basal metabolic rate

    Variation of basal metabolic rate (kcal)

    Measured: Change from Baseline basal metabolic rate at 60 days

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 Mar 2022
  2. Study start1 Dec 2026 (estimated)
  3. Primary completion1 Dec 2028 (estimated)
  4. Study completion1 Mar 2029 (estimated)

Why it stopped: ethical issue

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
12 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05298891
Sponsor's protocol ID
CE 008/22
Acronym
IpoProAcro
Status last verified
Oct 2026
First submitted
18 Mar 2022
Last updated
29 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Publications

  • Caputo M, Pigni S, Agosti E, Daffara T, Ferrero A, Filigheddu N, Prodam F. Regulation of GH and GH Signaling by Nutrients. Cells. 2021 Jun 2;10(6):1376. doi: 10.3390/cells10061376.

    PubMed 34199514
  • Suminski RR, Robertson RJ, Goss FL, Arslanian S, Kang J, DaSilva S, Utter AC, Metz KF. Acute effect of amino acid ingestion and resistance exercise on plasma growth hormone concentration in young men. Int J Sport Nutr. 1997 Mar;7(1):48-60. doi: 10.1123/ijsn.7.1.48.

    PubMed 9063764
  • van Vught AJ, Nieuwenhuizen AG, Brummer RJ, Westerterp-Plantenga MS. Effects of oral ingestion of amino acids and proteins on the somatotropic axis. J Clin Endocrinol Metab. 2008 Feb;93(2):584-90. doi: 10.1210/jc.2007-1784. Epub 2007 Nov 20.

    PubMed 18029456
  • Sellini M, Fierro A, Marchesi L, Manzo G, Giovannini C. [Behavior of basal values and circadian rhythm of ACTH, cortisol, PRL and GH in a high-protein diet]. Boll Soc Ital Biol Sper. 1981 May 15;57(9):963-9. Italian.

    PubMed 6269563
  • Levine ME, Suarez JA, Brandhorst S, Balasubramanian P, Cheng CW, Madia F, Fontana L, Mirisola MG, Guevara-Aguirre J, Wan J, Passarino G, Kennedy BK, Wei M, Cohen P, Crimmins EM, Longo VD. Low protein intake is associated with a major reduction in IGF-1, cancer, and overall mortality in the 65 and younger but not older population. Cell Metab. 2014 Mar 4;19(3):407-17. doi: 10.1016/j.cmet.2014.02.006.

    PubMed 24606898
  • Allen NE, Appleby PN, Davey GK, Kaaks R, Rinaldi S, Key TJ. The associations of diet with serum insulin-like growth factor I and its main binding proteins in 292 women meat-eaters, vegetarians, and vegans. Cancer Epidemiol Biomarkers Prev. 2002 Nov;11(11):1441-8.

    PubMed 12433724
  • Hoppe C, Udam TR, Lauritzen L, Molgaard C, Juul A, Michaelsen KF. Animal protein intake, serum insulin-like growth factor I, and growth in healthy 2.5-y-old Danish children. Am J Clin Nutr. 2004 Aug;80(2):447-52. doi: 10.1093/ajcn/80.2.447.

    PubMed 15277169
  • Romo Ventura E, Konigorski S, Rohrmann S, Schneider H, Stalla GK, Pischon T, Linseisen J, Nimptsch K. Association of dietary intake of milk and dairy products with blood concentrations of insulin-like growth factor 1 (IGF-1) in Bavarian adults. Eur J Nutr. 2020 Jun;59(4):1413-1420. doi: 10.1007/s00394-019-01994-7. Epub 2019 May 14.

    PubMed 31089868
  • Beasley JM, Gunter MJ, LaCroix AZ, Prentice RL, Neuhouser ML, Tinker LF, Vitolins MZ, Strickler HD. Associations of serum insulin-like growth factor-I and insulin-like growth factor-binding protein 3 levels with biomarker-calibrated protein, dairy product and milk intake in the Women's Health Initiative. Br J Nutr. 2014 Mar 14;111(5):847-53. doi: 10.1017/S000711451300319X. Epub 2013 Oct 7.

    PubMed 24094144
  • Li R, Ferreira MP, Cooke MB, La Bounty P, Campbell B, Greenwood M, Willoughby DS, Kreider RB. Co-ingestion of carbohydrate with branched-chain amino acids or L-leucine does not preferentially increase serum IGF-1 and expression of myogenic-related genes in response to a single bout of resistance exercise. Amino Acids. 2015 Jun;47(6):1203-13. doi: 10.1007/s00726-015-1947-8. Epub 2015 Mar 5.

    PubMed 25740607
  • Coopmans EC, Berk KAC, El-Sayed N, Neggers SJCMM, van der Lely AJ. Eucaloric Very-Low-Carbohydrate Ketogenic Diet in Acromegaly Treatment. N Engl J Med. 2020 May 28;382(22):2161-2162. doi: 10.1056/NEJMc1915808. No abstract available.

    PubMed 32459928

Questions about this trial

What is this clinical trial studying?

A study testing Usual clinical practice + hypoproteic diet in people with Acromegaly, run by Azienda Ospedaliero Universitaria Maggiore della Carita at 1 site in Italy.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: paused, as of the sponsor's last update on 29 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Italy. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in disease related hormones (time frame: Change from Baseline GH, IGF-1, IGFBP1, IGFBP3 blood levels at 15 days, 30 days, 45 days, 60 days). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05298891, which also lists 11 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Oct 2026.

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