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Osilodrostat for Glycemic Control in Mild Autonomous Cortisol Secretion (MACS) With Difficult-To-Control Type 2 Diabetes - A Randomized, Double-Blind, Placebo-Controlled Phase 2 Study (GLYCOSIL-MACS)

1. november 2026 oppdatert av: Beckey Trinh

This single-centre, randomized, double-blind, placebo-controlled phase 2 trial investigates whether lowering cortisol with osilodrostat improves blood-glucose control in adults with mild autonomous cortisol secretion (MACS) and difficult-to-control type 2 diabetes. Forty-four participants are randomly assigned 1:1 to osilodrostat or matching placebo, taken once daily for 12 weeks, together with a blinded hydrocortisone/placebo for stress (sick-day) dosing. The primary outcome is the change in HbA1c from baseline to week 12; secondary outcomes include continuous glucose monitoring (CGM) metrics, cardiometabolic parameters, cortisol measures and quality of life. Participants are followed for a safety visit 4 weeks after the end of treatment.

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

MACS is a common, mild form of endogenous hypercortisolism that may adversely affect glucose metabolism. In participants with confirmed MACS and difficult-to-control type 2 diabetes, this trial tests whether pharmacological cortisol reduction with osilodrostat improves glycaemic control. After a screening visit and a 14-day CGM run-in, participants are randomized 1:1 to osilodrostat 1 mg once daily at 18:00 (single optional escalation to 2 mg after 14 days, safety-guided) or matching placebo for 12 weeks; both arms receive a blinded hydrocortisone/placebo for stress dosing (double-dummy). Background glucose- and blood-pressure-lowering therapy is continued and adjusted only per predefined safety algorithms. Assessments include HbA1c, continuous glucose monitoring, blood pressure, lipids, anthropometrics, DXA body composition and bone density, plasma/salivary/urinary cortisol, quality-of-life and sleep questionnaires, and safety laboratory and ECG monitoring. The primary analysis is an ANCOVA of the change in HbA1c at week 12 in the intention-to-treat population under a treatment-policy estimand; CGM endpoints are analysed with mixed-effects models for repeated measures.

Studietype

Intervensjonell

Registrering (Antatt)

44

Fase

  • Fase 2

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studiesteder

      • Basel, Sveits
        • University Hospital Basel, Clinic of Endocrinology, Diabetology & Metabolism
        • Ta kontakt med:

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 74 år (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria:

  • Age 18 to <75 years.
  • Confirmed MACS per ESE 2023 guidelines: serum cortisol >50 nmol/L after 1 mg dexamethasone suppression test, low ACTH and DHEAS, and uni-/bilateral adrenal adenoma(s) or macronodular/micronodular/diffuse bilateral adrenal hyperplasia on CT or MRI.
  • Morning serum cortisol >300 nmol/L.
  • Difficult-to-control type 2 diabetes: HbA1c >7.0% despite one of - ≥3 glucose-lowering medications; insulin plus ≥1 glucose-lowering medication; ≥2 glucose-lowering medications and ≥1 micro-/macrovascular complication; or ≥2 glucose-lowering and ≥2 blood-pressure-lowering medications.
  • Stable background pharmacotherapy for ≥4 weeks before the first study visit.
  • For persons of childbearing potential: agreement to abstinence or contraception with a failure rate ≤1%/year during treatment and for 1 month after the last dose.

Exclusion Criteria:

  • Age ≥75 years (osilodrostat not sufficiently studied in this age group per the SmPC).
  • Known hypersensitivity to osilodrostat, its excipients, or the placebo.
  • Planned adrenalectomy before completion of the study.
  • Malignant adrenal tumour.
  • Type 1 diabetes; new-onset diabetes (<1 year).
  • Systemic glucocorticoid therapy within 3 months, or planned use.
  • Current/recent intake of medications affecting adrenal steroidogenesis or cortisol assessment.
  • Concomitant therapy with clinically relevant drug-drug interactions with osilodrostat (strong CYP3A4 inhibitors; strong CYP3A4/CYP2B6 inducers; QT-prolonging medicinal products).
  • Participation in another interventional trial within the last 30 days.
  • Pregnancy or breastfeeding; WOCBP unwilling to use highly effective contraception.
  • Excessive alcohol consumption; severe untreated sleep apnea; night-shift work.
  • Severe psychiatric, medical or surgical illness.
  • Severe renal impairment (eGFR < 30 mL/min/1.73 m²), hemodialysis or end-stage renal disease.
  • Liver cirrhosis Child-Pugh B or C.
  • Refractory hypokalemia or hypomagnesemia (not correctable to K ≥4.0 and Mg ≥1.0 mmol/L before first dose).
  • QTc > 480 ms on baseline ECG, or known congenital long QT syndrome.
  • Uncontrolled arterial hypertension (≥ 160/100 mmHg despite therapy)
  • Uncontrolled thyroid disease
  • Severe cardiovascular disease (NYHA class III-IV heart failure, myocardial infarction or unstable angina within the previous 6 months, or clinically significant arrhythmia)
  • History of breast or endometrial carcinoma

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Firemannsrom

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Osilodrostat

Osilodrostat 1 mg once daily at 18:00 for 12 weeks (single optional escalation to 2 mg after 14 days), plus blinded hydrocortisone 10 mg for stress/sick-day dosing only.

1 mg film-coated tablet, orally once daily at 18:00; optional single escalation to 2 mg after 14 days; 12 weeks.

blinded stress/sick-day (rescue) dosing only, per written instructions

Placebo komparator: Placebo

Placebo once daily at 18:00 for 12 weeks, plus blinded placebo for hydrocortisone (identical schedule).

placebo tablet, orally once daily at 18:00; 12 weeks

placebo tablet for stress-dosing regimen

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change from baseline in HbA1c at week 12
Tidsramme: Baseline and week 12

Between-group difference in HbA1c change (%). Time Frame: Baseline and week 12

Baseline and week 12

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
CGM Time in Range (3.9-10.0 mmol/L, %)
Tidsramme: baseline, week 6 and week 12

14-day windows preceding baseline, week 6 and week 12.

baseline, week 6 and week 12
CGM Time in Tight Range (3.9-7.8 mmol/L, %)
Tidsramme: baseline, week 6 and week 12

14-day windows preceding baseline, week 6 and week 12.

baseline, week 6 and week 12
CGM Time below range (<3.9 and <3.0 mmol/L, %)
Tidsramme: baseline, week 6 and week 12

14-day windows preceding baseline, week 6 and week 12

baseline, week 6 and week 12
CGM Time above range (>10.0 and >13.9 mmol/L, %)
Tidsramme: baseline, week 6 and week 12

14-day windows preceding baseline, week 6 and week 12.

baseline, week 6 and week 12
Change in blood pressure
Tidsramme: Baseline and week 12
Baseline and week 12
Change in lipid profile
Tidsramme: Baseline and week 12
Baseline and week 12
Change in body weight and waist/hip circumference
Tidsramme: Baseline and week 12
Baseline and week 12
Change in DXA-derived body composition
Tidsramme: Baseline and week 12
Baseline and week 12
Proportion of participants requiring reduction of hypoglycemia-causing therapy (insulin/sulfonylurea)
Tidsramme: Baseline to week 12
Baseline to week 12
Change in antihypertensive medication
Tidsramme: Baseline to week 12
Baseline to week 12
Change in plasma cortisol
Tidsramme: Baseline and week 12
Baseline and week 12
Change in salivary cortisol
Tidsramme: Baseline to week 12
Baseline to week 12
Change in 24-h urinary cortisol
Tidsramme: Baseline and week 12
Baseline and week 12
Change from baseline in health-related quality of life (SF-36)
Tidsramme: Baseline and week 12

8 subscales + physical/mental component summaries, 0-100, higher = better

Baseline and week 12
Change from baseline in disease-specific quality of life (CushingQoL questionnaire)
Tidsramme: Baseline and week 12

higher = better

Baseline and week 12
Change from baseline in sleep quality (Pittsburgh Sleep Quality Index, PSQI)
Tidsramme: Baseline and week 12

global score 0-21, higher = worse sleep

Baseline and week 12

Andre resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change from baseline in bone mineral density by DXA (g/cm²)
Tidsramme: Baseline and week 12
Baseline and week 12
Change from baseline in serum β-CTX (C-terminal telopeptide of type I collagen)
Tidsramme: Baseline and week 12
Baseline and week 12
Change from baseline in serum P1NP (procollagen type I N-terminal propeptide)
Tidsramme: Baseline and week 12
Baseline and week 12
Change from baseline in total alkaline phosphatase (U/L)
Tidsramme: Baseline and week 12
Baseline and week 12
Change from baseline in bone-specific alkaline phosphatase
Tidsramme: Baseline and week 12
Baseline and week 12
Change from baseline in the clinical Cushing severity score
Tidsramme: Baseline and week 12

Li et al. 2023 clinical severity score; 0-22, higher = more severe

Baseline and week 12
Change from baseline in handgrip strength
Tidsramme: Baseline and week 12

hand dynamometer; kg, best of three

Baseline and week 12
Change from baseline in the five-times sit-to-stand test
Tidsramme: Baseline and week 12

seconds; lower = better

Baseline and week 12
Serum interleukin-6
Tidsramme: Baseline and week 12
Baseline and week 12
Serum TNF-α
Tidsramme: Baseline and week 12
Baseline and week 12
Serum IL-1Ra
Tidsramme: Baseline and week 12
Baseline and week 12
Serum hs-CRP
Tidsramme: Baseline and week 12
Baseline and week 12
Plasma and 24-h urinary steroid metabolome
Tidsramme: Baseline and week 12
Baseline and week 12
Circadian clock-gene expression (whole-blood RNA)
Tidsramme: Baseline and week 12
Baseline and week 12

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Samarbeidspartnere

Etterforskere

  • Hovedetterforsker: Beckey Trinh, PD, MD, PhD, University Hospital, Basel, Switzerland

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

1. november 2026

Primær fullføring (Antatt)

1. april 2029

Studiet fullført (Antatt)

1. oktober 2029

Datoer for studieregistrering

Først innsendt

23. september 2026

Først innsendt som oppfylte QC-kriteriene

1. november 2026

Først lagt ut (Faktiske)

6. november 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

6. november 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

1. november 2026

Sist bekreftet

1. november 2026

Mer informasjon

Begreper knyttet til denne studien

Andre studie-ID-numre

  • GLYCOSIL-MACS
  • 2026-01499 (Annen identifikator: BASEC / Ethics Committee Northwest and Central Switzerland, EKNZ)
  • 205.123670 (Annen identifikator: Swissmedic)
  • SNCTP000007077 (Annen identifikator: Swiss National Clinical Trials Portal)

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

IPD-planbeskrivelse

Coded study data are held by the sponsor in Switzerland; only anonymised/aggregated data and the final report are shared externally, per the protocol data-protection section.

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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