The GranStone Trial

2026-525608-85-00 Phase II and Phase III (Integrated) Authorised, recruitment pending

Status Authorised, recruitment pending · 1 EU/EEA countries · 1 sites

Overview

Sponsor-declared trial summary

Phase Phase II and Phase III (Integrated)
Status Authorised, recruitment pending
Participants planned 100
Countries 1
Sites 1

Paraffin Oil Induced Granulomatous Disease

The main objective is to determine whether treatment with empagliflozin or losartan can reduce the risk of kidney stones and disease progression in patients with paraffin induced granulomas.

Key facts

Sponsor
Region Hovedstaden
Participant type
Patients
Age range
18-64 years, 65+ years
Gender
Male
Therapeutic area
Diseases [C] - Musculoskeletal Diseases [C05], Diseases [C] - Hormonal diseases [C19], Diseases [C] - Male Urogenital Diseases [C12]
Decision date (initial)
2026-05-11
Transition trial
No
Low-intervention
No
Rare-disease indication
Yes
Vulnerable population
No

Trial design

CTIS Part I — objectives, methods, condition coding

Main objective

Scope: Efficacy, Therapy

The main objective is to determine whether treatment with empagliflozin or losartan can reduce the risk of kidney stones and disease progression in patients with paraffin induced granulomas.

Conditions and MedDRA coding

Paraffin Oil Induced Granulomatous Disease

VersionLevelCodeTermSystem organ class
20.0 LLT 10033789 Paraffinoma formation 10018065

Eligibility criteria

Principal inclusion / exclusion criteria as submitted by sponsor

Inclusion criteria 4

  1. Signed informed consent by participant
  2. Male
  3. 18-70 years
  4. Paraffin granuloma disease with hypercalcemia, hypoparathyroidism, hypercalciuria or a history of nephrolithiasis

Exclusion criteria 8

  1. eGFR < 20 ml/min
  2. Cancer (past or present, except basal cell skin cancer or squamous cell skin cancer), which in the investigator’s opinion could interfere with the results of the trial
  3. Type 1 DM
  4. Known autosomal dominant or autosomal recessive polycystic kidney disease, lupus nephritis or ANCA-associated vasculitis
  5. History of organ transplantation
  6. Receiving therapy with an SGLT2 inhibitor or ATII antagonist within 8 weeks prior to enrolment or previous intolerance of an SGLT2 inhibitor or ATII antagonist.
  7. Known history of angioedema
  8. Mental incapacity, language barriers or unwillingness to comply with the requirements of the protocol, which may preclude adequate understanding or co-operation during the trial, as judged by the investigator

Endpoints

Primary and secondary outcome measures (English text)

Primary endpoints 1

  1. Image verified new or increased nephrolithiasis or nephrocalcinosis (from 1-24 months).

Secondary endpoints 15

  1. Change in estimated glomerular filtration rate (eGFR).
  2. Change in calcium homeostasis after 12 and 24 months defined by: 1A Change in p-Calcium ion concentration; 1B Change in p-PTH concentration; 1C Change in urine calcium excretion.
  3. Change in average daily prednisolone dosage based on cumulative average predniso-lone dose.
  4. Change in p-creatinine, eGFR and BUN.
  5. Change in p-IL-2R and/or p-ACE.
  6. Change in physical- and mental health scores (SF-36).
  7. Change in mineral homeostasis in serum and urine (albumin, phosphate, magnesium, iron, ferritin, FGF23, Klotho).
  8. Changes in serum vitamin D metabolites (25OHD,24,25(OH)2D3, 1,25(OH)2D).
  9. Change in urine Na, Ka, pH, citrate, oxalate, bicarbonate, uric acid, urea.
  10. Changes in left ventricular ejection fraction (LVEF) and other indices of cardiac func-tion as measured by transthoracic echocardiography.
  11. Incident or worsening signs of: Systolic- and/or diastolic dysfunction, left ventricular hypertrophy, structural heart disease including valvular pathology.
  12. Changes in CT Hounsfield Units in the femoral neck and lumbar vertebrae.
  13. Changes Coronary Artery Calcium Score on CT-scan.
  14. Change in BMD, fat- and lean mass evaluated by DXA-scan.
  15. Changes in self-reported kidney stones

Investigational products

Investigational medicinal products (IMPs), comparators, placebo, auxiliary

Test 2

Losartan Potassium

SCP1083046 · ATC

Active substance
Losartan Potassium
Route of administration
ORAL USE
Max daily dose
100 mg milligram(s)
Max total dose
73000 mg milligram(s)
Max treatment duration
24 Month(s)
Authorisation status
Authorised
ATC code
C09CA01 — LOSARTAN
Marketing authorisation
-
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Empagliflozin

SCP150002022 · ATC

Active substance
Empagliflozin
Route of administration
ORAL USE
Max daily dose
25 mg milligram(s)
Max total dose
18250 mg milligram(s)
Max treatment duration
24 Month(s)
Authorisation status
Authorised
ATC code
A10BK03 — EMPAGLIFLOZIN
Marketing authorisation
-
Paediatric formulation
No
Orphan designation
No
Modified vs. Marketing Authorisation
No

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Region Hovedstaden

Sponsor organisation
Region Hovedstaden
Address
Borgmester Ib Juuls Vej 1
City
Herlev
Postcode
2730
Country
Denmark

Scientific contact point

Organisation
Region Hovedstaden
Contact name
Martin Blomberg Jensen

Public contact point

Organisation
Region Hovedstaden
Contact name
Martin Blomberg Jensen

Third parties 1

OrganisationCity, countryDuties
Region Hovedstaden
ORG-100003705
Frederiksberg, Denmark On site monitoring

Locations

1 EU/EEA country · 1 investigational sites

By country

CountryMS statusPlanned subjectsSites
Denmark Authorised, recruitment pending 100 1
Rest of world 0

Investigational sites

Denmark

1 site · Authorised, recruitment pending
Region Hovedstaden
Division of Translational Endocrinology, Herlev Ringvej 75, 2730, Herlev

Results and documents

Annex IV summary of results, Annex V layperson summary, and all documents registered in CTIS for this trial

Documents 15 files

Public protocol annexes, IB summaries, regulatory submissions and post-authorisation documents registered in CTIS.

TypeTitleVersion
Protocol (for publication) D1_Protocol_2026-525608-85 5
Protocol (for publication) D1_Protocol_2026-525608-85_track_changes 5
Protocol (for publication) D4_Patient facing documents SF-36 1
Recruitment arrangements (for publication) K1_Recruitment arrangements 5
Recruitment arrangements (for publication) K1_Recruitment arrangements_track_changes 4
Subject information and informed consent form (for publication) L1_ICF 3
Subject information and informed consent form (for publication) L1_ICF_apendix 3
Subject information and informed consent form (for publication) L1_ICF_apendix_v3_track_changes 3
Subject information and informed consent form (for publication) L1_ICF_v3_track_changes 3
Subject information and informed consent form (for publication) L1_SIS 4
Subject information and informed consent form (for publication) L1_SIS_track_changes 4
Summary of Product Characteristics (SmPC) (for publication) G2_SmPC Jardiance 1
Summary of Product Characteristics (SmPC) (for publication) G2_SmPC Losartan 1
Synopsis of the protocol (for publication) D1_Protocol synopsis 2026-525608-85 2
Synopsis of the protocol (for publication) D1_Protocol synopsis 2026-525608-85__TC 2

Application history

1 submissions — initial application plus substantial / non-substantial modifications

#TypeCodeSubmittedReference MSConclusionDecision date
1 INITIAL IN 2026-02-10 Denmark Acceptable
2026-05-11
2026-05-11