A Trial of HRS-7085 Tablets in Patients With Moderate to Severe Active Ulcerative Colitis

A Phase IB Clinical Study to Evaluate the Safety, Tolerability, and Pharmacokinetics of HRS-7085 Tablets in Patients With Moderate to Severe Active Ulcerative Colitis

The study is being conducted to evaluate the safety, tolerability and pharmakokinetics of HRS-7085 in adults.

Study Overview

• Status: Not yet recruiting
• Conditions: Moderate to Severe Ulcerative Colitis
• Intervention / Treatment: Drug: HRS-7085 tablets; Drug: Placebo

• Study Type: Interventional
• Enrollment (Estimated): 8
• Phase: Phase 1

Contacts and Locations

• Study Contact: Name: ChuiFung Chong; Phone Number: +41794768792; Email: Chuifung.chong@luzsana.com

Study Locations

• Moldova
  • Chișinău Municipality
    • Chisinau, Chișinău Municipality, Moldova, MD-2025
      • IMSP Republican Clinical Hospital "Timofei Mosneaga", Clinical Trial Unit ARENSIA EXPLORATORY MEDICINE
      • Principal Investigator: Alina Jucov

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. At least 18 years old and not more than 75 years old at the time of signing the Informed Consent Form (ICF), regardless of their sex.
2. Body mass index [BMI = weight (kg)/height2(m2)] ≥ 18 kg/m2 at screening.
3. Participants with active UC who have a modified 9-point Mayo score of 5 to 9 and an endoscopic subscore of 2 to 3 at baseline (the interval between screening endoscopy and baseline cannot exceed 14 days), with a rectal bleeding subscore of at least 1.
4. At the time of first dose, the participant is diagnosed with UC for at least 90 days, and UC is confirmed by investigation during the screening visit.

5. The investigator considers that the participant has an inadequate response, loss of response, or intolerance to conventional therapy (oral 5-ASA, immunomodulators, or corticosteroids), anti-tumor necrosis factor (TNF) or other biologic therapy, JAK inhibitor therapy, or is unable to receive these treatments for other reasons.

   Note: definitions of insufficient response, loss of response, or intolerance are provided in Appendix 13.5.

6. If the participant is currently receiving the following UC therapy at screening, a stable dosage should be administered within the specified time:

   1. Oral 5-ASA (mesalazine) (with stable dosage at least 2 weeks before baseline and during the study treatment period), AND/OR
   2. Oral corticosteroids (prednisone or prednisolone ≤ 20 mg/day) (with stable dosage for at least 2 weeks prior to baseline and during the treatment period). All other systemic corticosteroid routes are prohibited.
7. The participant voluntarily signs the Informed Consent Form (ICF) before any study-related procedures, can communicate smoothly with the investigator, understands and is willing to strictly comply with the requirements of this clinical study protocol to complete the study.

Women of childbearing potential must agree to use highly effective contraceptive methods during the trial and within 3 months after the last dose of trial intervention. Serum or urine pregnancy tests must be negative before and during the trial. Females who are lactating are not eligible to participate in the trial (see Section 13.1 for details). Males must use highly effective contraceptive methods during the trial and within 3 months after the last dose of trial intervention during intercourse with a female of childbearing potential. Donation of sperm during this period is prohibited.

Exclusion Criteria:

1. Any of the following medical histories or concomitant diseases:

   1. Participants clinically diagnosed with unclassified colitis or suggestive of Crohn's disease.
   2. Participants with UC, limited to proctitis (distal ≤15 cm).
   3. Participants diagnosed with UC who are treatment-naive (no prior treatment received).
   4. Participants presenting with clinical symptoms of ischemic colitis, fulminant colitis, or toxic megacolon.
   5. Participants who have previously undergone surgery for UC or might require surgery during the study phase.
   6. Screening investigation finds that the participant has a medical history of gastrointestinal dysplasia (atypical hyperplasia)/cancer or dysplasia (atypical hyperplasia)/cancer. Completely resected low-grade dysplasia will be excluded.

   7. Participants with a positive Clostridium difficile (C. difficile) test at screening may be enrolled only if they have:

      1. Completed appropriate standard-of-care treatment for C. difficile infection;
      2. Achieved clinical resolution of diarrheal symptoms; AND
      3. A documented negative repeat stool test (toxin A/B assay or NAAT/PCR) conducted after completion of treatment and within 7-14 days prior to baseline/randomization.
   8. Participants with evidence of other intestinal infections within 30 days of endoscopic screening, or other intestinal pathogen screening.

   9. The participant has or previously had:

      1. Clinically significant infection (e.g., requiring hospitalization or parenteral antimicrobial therapy or opportunistic infection) within 1 month before baseline.
      2. History of herpes zoster occurring twice or more, or herpes zoster disseminated (occurring once).
      3. Any other infection history that the investigator considers might be aggravated by participation in this study.
      4. Presence of any infection requiring antimicrobial therapy within 2 weeks before screening (excluding local antimicrobial therapy).

2. Use of any of the following drugs or participation in clinical study (defined as signing the ICF and receiving at least one dose of drug or device therapy):

   1. Received JAK inhibitors (upadacitinib, tofacitinib) within 4 weeks before baseline.

   2. Received biological agents before baseline (for specific washout time, see Section 6.8.1):

      1. Received anti-TNFα antibody therapy within 8 weeks before baseline;
      2. Received anti-α4β7 antibody therapy within 12 weeks before baseline;
      3. Received anti-interleukin (IL)-23 antibody therapy within 12 weeks before baseline.
   3. Received treatment with azathioprine/6-mercaptopurine, methotrexate, or thalidomide within 2 weeks before baseline.
   4. Treatment with ciclosporin, mycophenolate mofetil, or tacrolimus within 4 weeks before baseline.
   5. Received intravenous corticosteroids, or corticosteroids by rectal use, or 5-ASA by rectal use within 2 weeks before baseline.
   6. Participation in any clinical study of drugs (including investigational vaccine) or medical devices within 3 months before baseline or within 5 half-lives of the investigational drug(s) (whichever is longer).

3. Presence of the following important medical history or pre-existing diseases affecting safety:

   1. The participant has a medical history of lymphoproliferative diseases, including lymphoma or symptoms and signs of potential lymphoproliferative disorders.
   2. Participants with any active neoplasm malignant or history of neoplasm malignant within 5 years prior to the screening visit, except for recovered cutaneous squamous cell carcinoma or basal cell carcinoma or cervix carcinoma in situ.
   3. Within 3 months prior to screening, participants with a medical history of moderate to severe cardiac failure congestive (New York Heart Association [NYHA] Grade 3 or above), occurrence of cardiovascular events or severe hemorrhage events, which the investigator considers unsuitable for the participant to participate in the clinical study.

   4. Active tuberculosis (TB) or latent TB infection (defined as meeting at least one of the following criteria):

      1. Presence of active TB or symptoms of active TB at screening.
      2. A positive TB test (by QuantiFERON-TB Gold Test or other interferon-gamma release assay [IGRA]). If the IGRA result is indeterminate, a retest is allowed; participants within determinate results on both tests will be considered positive. For participants with a positive TB test but no clinical symptoms or imaging findings, prophylactic anti-TB treatment for at least 1 month is recommended before re-screening, and a positive result upon re-screening does not lead to exclusion criterion. For participants with a positive TB test but no clinical symptoms or imaging findings who have previously received prophylactic anti-TB treatment for at least 1 month, they should not be excluded based on this criterion;
      3. Imaging examination within 3 months prior to screening indicating signs of active TB;
      4. Participants with a medical history of active TB but with medical records proving completion of a full course of anti-TB treatment may confirm with the sponsor whether they could enter the study.
   5. Hepatitis B Virus Surface Antigen (HBsAg), human immunodeficiency virus (HIV) antibody, syphilis antibody investigation, anti-Hepatitis C Virus (HCV) antibody test positive; if HBsAg-negative, but Hepatitis B core antibody (HBcAb)-positive and Hepatitis B Virus (HBV) DNA-positive or above the upper limit of normal (ULN).
   6. Presence of severe, progressive, or uncontrolled diseases of the cardiovascular and cerebrovascular, hepatic, renal, pulmonary, gastrointestinal, hematopoietic, endocrine, nervous system (e.g., depression, suicidal tendency, and psychological disorders), or other conditions that the investigator considers inappropriate for the patient to participate in this trial.

4. Screening:

   1. Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) ≥ 3 × ULN.
   2. Total bilirubin ≥ 1.5 × ULN.
   3. Serum creatinine > 2.0 mg/dL (177 μmol/L).
   4. Male participants with hemoglobin < 85.0 g/L, female participants < 80.0 g/L.
   5. White blood cell count < 3.0 × 10^9/L.
   6. Neutrophil count < 1.5 × 10^9/L.
   7. Platelet count < 100 × 10^9/L.
   8. 12-lead ECG investigation suggesting abnormalities with clinical significance that may affect the safety of the participant, including but not limited to acute myocardial ischemia myocardial infarction, severe arrhythmia or significant QTc prolongation. ECG exclusion criteria are detailed in Appendix 0.

5. General conditions:

   1. Pregnant or breastfeeding women (pregnancy is defined as the state after conception to the termination of gestation), or with a positive human chorionic gonadotropin (hCG) test result.
   2. Allergy to the study drug or any component of the study drug.
   3. A history of alcoholism or illegal drug abuse within 1 year prior to screening.
   4. Received a live attenuated vaccine within 12 weeks before the first drug administration, or intends to receive a live attenuated vaccine during the study period, or participated in a vaccine clinical trial within 12 weeks before the first drug administration.
   5. Donated approximately 500 mL or more of blood within 8 weeks prior to the first dose and/or plans to donate blood during the study period.

The investigator judges that there are circumstances affecting the evaluation of the safety and efficacy of the study drug.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Active treatment of HRS-7085 from Week 1-Week 12	Drug: HRS-7085 tablets; HRS-7085 tablets
Placebo Comparator: Placebo from Week 1-Week 12	Drug: Placebo; HRS-7085 tablet blank preparation

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Adverse events (AEs)	at Week 12

Secondary Outcome Measures

Outcome Measure	Time Frame
AUClast,	Day 1
Tmax,	Day 1
Cmax,	Day 1
AUC0-inf,	Day 1
AUCtau,	Day 1
t1/2,	Day 1
CL/F,	Day 1
Vz/F;	Day 1
AUClast,ss,	Day 29
Tmax,ss,	Day 29
Cmax,ss,	Day 29
AUC0-inf,ss,	Day 29
AUCtau,ss,	Day 29
t1/2	Day 29
CL/F	Day 29
Vz/F	Day 29
Cmin,ss	Day 29
Racc (accumulation ratio)	Day 29
The proportion of participants who achieved clinical response at Week 12.	at Week 12
The proportion of participants who achieved symptom relief at Week 12.	at Week 12
The proportion of participants who achieved clinical remission at Week 12.	at Week 12
The proportion of participants achieving endoscopic remission at Week 12.	at Week 12
The proportion of participants achieving histological response at Week 12.	at Week 12
The proportion of participants achieving histologic endoscopic mucosal remission (HEMR) at Week 12.	at Week 12

Collaborators and Investigators

• Sponsor: Jiangsu HengRui Medicine Co., Ltd.

Study record dates

Study Major Dates

• Study Start (Estimated): August 1, 2026
• Primary Completion (Estimated): April 1, 2027
• Study Completion (Estimated): September 1, 2027

Study Registration Dates

• First Submitted: July 31, 2026
• First Submitted That Met QC Criteria: August 7, 2026
• First Posted (Actual): August 12, 2026

Study Record Updates

• Last Update Posted (Actual): August 12, 2026
• Last Update Submitted That Met QC Criteria: August 7, 2026
• Last Verified: July 1, 2026

More Information

Terms related to this study

• Other Study ID Numbers: HRS-7085-202

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No