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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 opdateret af: 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.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret 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.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

44

Fase

  • Fase 2

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

      • Basel, Schweiz
        • University Hospital Basel, Clinic of Endocrinology, Diabetology & Metabolism
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 74 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

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

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Firedobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 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

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
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
Foranstaltningsbeskrivelse
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
Foranstaltningsbeskrivelse
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

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

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

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. november 2026

Primær færdiggørelse (Anslået)

1. april 2029

Studieafslutning (Anslået)

1. oktober 2029

Datoer for studieregistrering

Først indsendt

23. september 2026

Først indsendt, der opfyldte QC-kriterier

1. november 2026

Først opslået (Faktiske)

6. november 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

6. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

1. november 2026

Sidst verificeret

1. november 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

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

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

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.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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