The goal of this clinical trial is to learn PK and PD of YG1699 in patients with diabetes and renal dysfuction.

Participants will:

Take YG1699 or a placebo every day for 8 days. Visit the clinic 7 times for checkups and tests. Keep a diary of their symptoms. Estimate PK data from a single dose of YG1699. Estimate PD data at baseline and the last day.

Background

Diabetic kidney disease (DKD), as one of the most common and serious complications of diabetes, has become the leading cause of end-stage renal disease (ESRD) worldwide. A domestic epidemiological survey shows that the prevalence of DKD in community patients was 30%-50% from 2009 to 2012, and accounted for about 40% in hospitalized patients in China. At present, the treatment of DKD is the comprehensive management of blood glucose, blood pressure and blood lipid. Nevertheless, about one-third of patients with type 1 diabetes mellitus (T1DM) and nearly half of patients with type 2 diabetes mellitus (T2DM) will progress to ESRD. Patients with DKD have higher complication rates and mortality. Studies have shown that the mortality rate of patients with diabetes complicated with DKD is 3 to 12 times higher than that of patients with simple diabetes. Although blood glucose is actively controlled and angiotensin-converting enzyme inhibitors (ACEI) or angiotensin II receptor blockers (ARB) are used to control hypertension in the treatment of diabetes, the progression of DKD is still inevitable. Much more clinical needs are still present. Sodium-glucose co-transporter inhibitors (SGLT2i) are new hypoglycemic drugs discovered in recent years. They play their hypoglycemic roles by inhibiting glucose reabsorption in renal tubules and increasing urinary glucose excretion. More clinical studies have found that SGLT2s not only the hypoglycemic effect, but also has the effect of delaying the progression of DKD and improving the prognosis of heart failure, and is recommended by international authoritative guidelines with class IA evidence for cardiorenal organ protection.

Glucose cannot freely pass through the cell membrane and must rely on glucose transporter proteins on the cell membrane. Sodium-dependent glucose cotransporters (SGLTs) are an important family of transporter proteins that regulate glucose absorption and excretion. SGLT1 and SGLT2 are the most well studied members of this family and are both major glucose transporter proteins. SGLT1 is expressed in various tissues such as the small intestine, heart and kidney. SGLT2 is mainly expressed in segment S1 of the proximal convoluted tubule of the kidney.

In the renal tubules, 95% of glucose is reabsorbed through SGLT2, and 5% of glucose is reabsorbed through SGLT1. When SGLT2 is inhibited, the glucose reabsorbed through SGLT1 significantly increases to 50%, so the hypoglycemic effect of SGLT2 inhibitors may be weakened. The dual effects of SGLT1 and SGLT2 inhibitors can bring more potential benefits for treatment, including continuing to maintain the effectiveness of SGLT2 selective inhibitors; inducing intestinal cells to secrete endogenous glucagon-like peptide-1 (GLP-1) and YY peptide (PYY); reducing the adverse reactions of SGLT2 inhibition, such as genitourinary tract infections and constipation; blocking or delaying the absorption of glucose by the gastrointestinal tract.

Sotagliflozin is a SGLT2i with partial SGLT1 inhibitory activity. It was approved by the European Medicines Agency (EMA) in 2019 for adjuvant treatment of T1DM complicated with obesity. Recently, the sotagliflozin heart failure protection study was terminated in the middle stage due to the excellent effect of improving the outcome of heart failure. And it has a good effect of reducing proteinuria in patients with DKD. This suggests that SGLT1/2 dual-channel blockers may have better hypoglycemic and organ protection effects.

YG1699 is an oral SGLT1 and SGLT2 dual-channel blocker, belonging to c-aryl glucoside derivatives. It can reduce the absorption of glucose into the blood in the gastrointestinal tract by inhibiting SGLT-1, and at the same time inhibit the reabsorption of glucose in the proximal convoluted tubule of the kidney by inhibiting SGLT-2, thereby increasing the excretion of glucose from the kidney and effectively reducing blood glucose levels. YG1699 reduces the risk of DKA caused by SGLT2i by increasing SGLT1 inhibitory activity. In addition, YG1699 shows non-pH-dependent solubility, has sufficient solubility in the gastrointestinal tract, has a high oral bioavailability in preclinical models, and has a low possibility of drug interactions. At present, including YG1699, there are three SGLT1/2 dual inhibitor are in the clinical research stage.

YG1699 has completed three clinical trials, named the phase I study (YG1699-01) on healthy subjects in the United States and the phase II study (YG1699-201) on type 1 diabetes, as well as the bridging study (YG1699-102) on healthy subjects in China. These clinical studies have confirmed that YG1699 has good human PK characteristics and good safety and tolerance. In the phase II T1DM study, compared head-to-head with DAPA, it shows a better effect on reducing postprandial blood glucose. All these clinical trials are in patients with eGFR>30 ml/min/1.73M2.

However, about 12 million diabetic patients have renal insufficiency, and there is still no pharmacokinetic and pharmacodynamic data of YG1699 in patients with renal insufficiency.

Key inclusion criteria include:

1. Ability to provide informed consent
2. Male or female patients ,age between 18 and 70 at screening
3. Meet the diagnostic criteria for diabetic nephropathy, including patients with type 1 or type 2 diabetes;
4. Fasting blood glucose <11.1 mmol/L, stable on baseline anti-diabetic medication
5. No history of SGLT2i use within the past month
6. Hemodialysis patients must have maintenance hemodialysis for more than 3 months, with 3 sessions per week (limited to HD or HDF treatment), and spKt/V>1.2 within 6 months
7. The patient has not used glucocorticoids, calcineurin inhibitors (cyclosporine, tacrolimus), etc. that affect blood sugar within the past month before signing the informed consent form
8. The baseline diabetes management medication regimen has been stable within the past 2 weeks.

Key exclusion criteria include:

1. Hypoglycemia occurs more than 2 times in one month
2. History of ketoacidosis
3. Patients who are being treated with swiram and digoxin
4. Patients with acute kidney injury (serum creatinine increased by ≥ 50% within 1 week) 5. Abnormal liver function (ALT >3 times the upper limit of normal value)

6. Hemoglobin <80g/L or >150g/L 7. The blood pressure of patients with recent symptomatic hypotension is lower than 90/60 mmHg 8. There is acute myocardial infarction stroke infection in the past month 9. There is systemic active infection or uncured tumor 10. The dialysis regimen of HD patients included HP treatment 11. Participating in other interventional clinical studies 12. Pregnant or lactating women 13. Other situations that the researcher thinks are not suitable for joining the study

Inclusion Criteria:

1. Ability to provide informed consent
2. Male or female patients ,age between 18 and 70 at screening
3. Meet the diagnostic criteria for diabetic nephropathy, including patients with type 1 or type 2 diabetes;
4. Fasting blood glucose <11.1 mmol/L, stable on baseline anti-diabetic medication
5. No history of SGLT2i use within the past month
6. Hemodialysis patients must have maintenance hemodialysis for more than 3 months, with 3 sessions per week (limited to HD or HDF treatment), and spKt/V>1.2 within 6 months
7. The patient has not used glucocorticoids, calcineurin inhibitors (cyclosporine, tacrolimus), etc. that affect blood sugar within the past month before signing the informed consent form
8. The baseline diabetes management medication regimen has been stable within the past 2 weeks.

Exclusion Criteria:

1. Hypoglycemia occurs more than 2 times in one month
2. History of ketoacidosis
3. Patients who are being treated with swiram and digoxin
4. Patients with acute kidney injury (serum creatinine increased by ≥ 50% within 1 week)
5. Abnormal liver function (ALT > 3 times the upper limit of normal value)
6. Hemoglobin < 80g/L or > 150g/L
7. The blood pressure of patients with recent symptomatic hypotension is lower than 90/60 mmHg
8. There is acute myocardial infarction stroke infection in the past month
9. There is systemic active infection or uncured tumor
10. The dialysis regimen of HD patients included HP treatment
11. Participating in other interventional clinical studies
12. Pregnant or lactating women
13. Other situations that the researcher thinks are not suitable for joining the study