Intervention: Gliclazide
Trial phase: Phase 4
ATC code: A10BB09 | G01AE10
SMILES: Cc1ccc(S(=O)(=O)NC(=O)NN2CC3CCCC3C2)cc1
Sex: All
Age groups: Adult | Older Adult
Healthy volunteers: No
Participants at risk: 20
Group description: Once daily treatment with oral gliclazide MR 30mg for 12 consecutive weeks.

Gliclazide 30mg QD: Gliclazide30mg once daily for 12 weeks
Eligibility criteria:
Inclusion Criteria:

Caucasian*
Both genders (females must be post-menopausal; no menses >1 year; in case of doubt, Follicle-Stimulating Hormone (FSH) will be determined with cut-off defined as >31 U/L)
Age: 35 - 75 years
BMI: >25 kg/m2
HbA1c: 6.5 - 9.0% Diabetes Control and Complications Trial (DCCT) or 48 - 86 mmol/mol International Federation of Clinical Chemistry (IFCC)
Treatment with a stable dose of oral antihyperglycemic agents for at least 3 months prior to inclusion
Metformin monotherapy
Combination of metformin and low dose SU derivative**
Hypertension should be controlled, i.e. ≤140/90 mmHg, and treated with an ACE-I or ARB (unless prevented by side effect) for at least 3 months.
Albuminuria should be treated with a RAAS-interfering agent (ACE-I or ARB) for at least 3 months.

Written informed consent

In order to increase homogeneity ** In order to accelerate inclusion, patients using combined metformin/SU derivative will be considered. In these patients, a 12 week wash-out period of the SU derivative will be observed, only when combined use has led to a HbA1c <8% at screening. Subsequently, patients will be eligible to enter the study, now using metformin monotherapy, provided that HbA1c still meets inclusion criteria.

Exclusion Criteria:

History of unstable or rapidly progressing renal disease
Macroalbuminuria; defined as albumin-creatinine ratio of 300mg/g.
Estimated GFR <60 mL/min/1.73m2 (determined by the Modification of Diet in Renal Disease (MDRD) study equation)
Current/chronic use of the following medication: thiazolidinedione (TZD), SU derivative, Glucagon like peptide 1 receptor agonist (GLP-1RA), (dipeptidyl peptidase 4 inhibitor) DPP-4I, SGLT-2 inhibitors, glucocorticoids, immune suppressants, antimicrobial agents, chemotherapeutics, antipsychotics, tricyclic antidepressants (TCAs) and monoamine oxidase inhibitors (MAOIs). Subjects on diuretics will only be excluded when these drugs cannot be stopped for the duration of the study.
Volume depleted patients. Patients at risk for volume depletion due to co-existing conditions or concomitant medications, such as loop diuretics should have careful monitoring of their volume status.
Chronic use of non-steroidal anti-inflammatory drugs (NSAIDs) will not be allowed, unless used as incidental medication (1-2 tablets) for non-chronic indications (i.e. sports injury, head-ache or back ache). However, no such drugs can be taken within a time-frame of 2 weeks prior to renal-testing
History of diabetic ketoacidosis (DKA) requiring medical intervention (eg, emergency room visit and/or hospitalization) within 1 month prior to the Screening visit.
Current urinary tract infection and active nephritis

Recent (<6 months) history of cardiovascular disease, including:

Acute coronary syndrome
Chronic heart failure (New York Heart Association grade II-IV)
Stroke or transient ischemic neurologic disorder
Complaints compatible with neurogenic bladder and/or incomplete bladder emptying (as determined by ultrasonic bladder scan)
Severe hepatic insufficiency and/or significant abnormal liver function defined as aspartate aminotransferase (AST) >3x upper limit of normal (ULN) and/or alanine aminotransferase (ALT) >3x ULN
(Unstable) thyroid disease; defined as free thyroxine (fT4) outside of laboratory reference values or change in treatment within 3 months prior to screening visit
History of or actual malignancy (except basal cell carcinoma)
History of or actual severe mental disease
Substance abuse (alcohol: defined as >4 units/day)
Allergy to any of the agents used in the study
Individuals who are investigator site personnel, directly affiliated with the study, or are immediate (spouse, parent, child, or sibling, whether biological or legally adopted) family of investigator site personnel directly affiliated with the study
Inability to understand the study protocol or give informed consent