End Stage Kidney Disease (ESKD)Phase 1NCT07619820
A Phase 1b Study to Evaluate the PK of CSL300 (Clazakizumab) in Chinese Subjects With End Stage Kidney Disease (ESKD)
A Phase 1 study testing CSL300 in people with End Stage Kidney Disease (ESKD), run by CSL Behring at 1 site in China.
Trial summary
This is a phase 1b, partial-blind (Sponsor unblinded), randomized, multicenter, placebo-controlled study. The primary objective of this study is to evaluate the pharmacokinetics (PK) of CSL300 after single and multiple doses in Chinese participants with end stage kidney disease (ESKD) undergoing dialysis. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- End Stage Kidney Disease (ESKD)
- What is being tested?
- CSL300
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 24 participants
- Where
- 1 siteChina
- Study dates
- 17 Jun 2026to 30 Nov 2027
- Phase
- Phase 1
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Participants has provided written informed consent and is willing and able to adhere to all protocol requirements.
- Aged 18 or older, inclusive, at the time of providing written informed consent.
- Diagnosis of ESKD undergoing maintenance dialysis for at least 12 weeks before Screening.
Who cannot join
- Exclusion related to risk of infection: concomitant use of systemic immunosuppressant agents, primary immunodeficiency, positive test for active tuberculosis (TB), history of latent TB without completion of full course of prophylactic treatment, evidence of human immunodeficiency virus infection during Screening, seropositivity for hepatitis B surface antigen or positive hepatitis B virus (HBV) DNA during Screening, seropositivity for hepatitis C virus ribonucleic acid during Screening, diagnosis of clinically significant active infection, history of / OR current invasive fungal infection OR other opportunistic infection OR recurrent cellulitis (defined as 2 or more episodes in the year prior to screening), administration of a live vaccine within 6 weeks of start of Screening, presence of urinary catheter, or evidence of wet gangrene or nonhealing ulcers.
- Exclusion related to laboratory abnormalities: abnormal liver function tests, neutropenia, thrombocytopenia, or significant anemia.
- Exclusion related to medical history: any life-threatening disease expected to result in death within 12 months (other than cardiovascular disease), evidence of active hepatic disease and / or moderate or severe hepatic impairment, recent unplanned hospitalization (< 30 days) prior to Screening, recent (< 3 months) major surgery or planned major surgery known at the time of Screening, poorly controlled hypertension, a present or previous (< 5 years) malignancy except for basal cell carcinoma, fully excised squamous cell carcinoma of the skin, or nonrecurrent (< 5 years of Screening) cervical carcinoma in situ, active or recent (< 30 days of Screening) clinically severe bleeding, a scheduled kidney transplant within 6 months of Screening, a history of anaphylaxis or hypersensitivity to CSL300 or any constituents of the product, or a history of demyelinating disorders.
- Exclusion related to risk of gastrointestinal perforation: a history of GI perforation, inflammatory bowel disease (except fully excised ulcerative colitis), or peptic ulcer disease (< 12 months before Screening), a history of diverticular disease or diverticulitis (except if disease has been fully excised). An incidental finding of diverticulosis (presence of small diverticula) and no history of symptoms, complications, or any episodes requiring treatment may be eligible for the study based on investigator's judgment. However, any history of complications, inflammation, or infection suggestive of diverticulitis or diverticular disease is exclusionary, inflammatory bowel disease (ie, Crohn's disease, ulcerative colitis except if fully excised, or prior gastric bypass surgery.
- Exclusion related to treatment compliance: evidence of inadequate dialysis, unwillingness or inability to comply with study procedures, a history of noncompliance with medical treatments, or ongoing alcohol or illicit substance abuse.
- Current or recent participation in research study involving an experimental agent < 3 months of Screening.
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- Pregnant, breastfeeding, or unwillingness to practice adequate contraception during the study and for 5 months after the last dose of investigational product.
- The presence of any condition that in the opinion of the Investigator would (1) compromise the safety of the participant in case of participation in the study, (2) compromise the quality of the data, and / or (3) limit the life expectancy of the participant to < 1 year.
- The Sponsor determines that the participant is no longer needed for participation in study.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
China1 site, 1 recruiting
- Recruiting
Peking University People's Hospital
Beijing, 100044
About this study
Official title: A Phase 1b, Randomized, Multicenter, Placebo-controlled Study to Evaluate the Pharmacokinetics and Safety of CSL300 (Clazakizumab) in Chinese Subjects With End Stage Kidney Disease Undergoing Dialysis
This is a phase 1b, partial-blind (Sponsor unblinded), randomized, multicenter, placebo-controlled study. The primary objective of this study is to evaluate the pharmacokinetics (PK) of CSL300 after single and multiple doses in Chinese participants with end stage kidney disease (ESKD) undergoing dialysis.
- Conditions
- End Stage Kidney Disease (ESKD)
- Being tested
- CSL300, Placebo
- Keywords
- High-sensitivity C-reactive protein, High-density lipoprotein cholesterol, Interleukin-6, Humanized Monoclonal antibody, Atherosclerotic cardiovascular disease, Diabetes mellitus, Systemic inflammation
- Medical subject headings
- Kidney Failure, Chronic, Atherosclerosis, Diabetes Mellitus
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
CSL300Biological
CSL300 is a humanized anti-interleukin 6 (anti-IL-6) monoclonal antibody (mAb).
PlaceboOther
Placebo is a solution for injection matching the excipient content and concentration of the CSL300 product, minus the active ingredient.
| Study group | Role | What they receive |
|---|---|---|
| CSL300 (Clazakizumab) | Experimental | Participants will receive CSL300 once every 4 weeks (Q4W) as a slow intravenous (IV) bolus, for a total of 20 weeks during the Treatment Period. Receives: Biological: CSL300 |
| Placebo | Placebo comparator | Participants will receive a placebo matching to CSL300 Q4W as a slow IV bolus, for a total of 20 weeks during the treatment period. Receives: Other: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Area Under the Concentration-time (AUC) Curve of CSL300 Over 1 Dosing Interval After Multiple Doses (AUC0-tau,MD)
Measured: Day 85 up to Day 113
Trough Concentration at Steady State (Ctrough,ss)
Measured: Up to Day 141
Secondary outcomes (10)
Number of Participants With Treatment Emergent Adverse Events (TEAEs), Serious Adverse Events (SAEs), and Adverse Event of Special Interests (AESIs)
The following adverse events (AEs) are defined as AESIs: relevant infections (tuberculosis, herpes simplex virus, herpes zoster, human papillomavirus, human immunodeficiency virus, hepatitis B, hepatitis C, and invasive fungal infections), and demyelinating disorders.
Measured: Up to Day 225 (End of Study [EoS])
Percentage of Participants With TEAEs, SAEs, and AESIs
The following AEs are defined as AESIs: relevant infections (tuberculosis, herpes simplex virus, herpes zoster, human papillomavirus, human immunodeficiency virus, hepatitis B, hepatitis C, and invasive fungal infections), and demyelinating disorders.
Measured: Up to Day 225 (EoS)
Percentage of Participants With a Clinically Significant Change From Baseline in Laboratory Test Results
Laboratory assessments will include hematology parameters such as white blood cells (leukocytes), neutrophils, and platelets; chemistry evaluations including alanine aminotransferase (ALT), aspartate aminotransferase (AST), and total bilirubin; a lipid panel comprising total cholesterol, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein (HDL) cholesterol, and triglycerides; and immunogenicity testing.
Measured: At Baseline and up to Day 225 (EoS)
Number of Participants With Antidrug Antibodies
The detection of antibodies to CSL300 will be performed using a validated immunoassay method.
Measured: At Days 1, 29, 85, and 169
Maximum Observed Concentration (Cmax) of CSL300
Measured: Up to Day 169
Area Under the Concentration-Time Curve From Time 0 to Day 28 (AUC0-28d) of CSL300
Measured: Up to Day 28
Trough Concentration (Ctrough) of CSL300
Measured: Up to Day 141
Time to Reach Cmax (Tmax) of CSL300
Measured: Up to Day 85
Change From Baseline on log-scale High-Sensitivity C-reactive Protein (hs-CRP)
Measured: At Baseline, Week 12, and Week 24
Plasma Interleukin-6 (IL-6) Free and Total Levels
Measured: At Weeks 12 and 24
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Jun 2026
- Study start17 Jun 2026
- Primary completion30 Aug 2027 (estimated)
- Study completion30 Nov 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for End Stage Kidney Disease (ESKD)Studies of the same condition, open and under way.
- More trials run by CSL BehringThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Partial-blind (Sponsor unblinded), randomized, multicenter, placebo-controlled study.
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 24 participants (estimated)
Sponsor and investigators
- Lead sponsor
- CSL Behring
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07619820
- Sponsor's protocol ID
- CSL300_1001
- Status last verified
- Jul 2026
- First submitted
- 26 May 2026
- Last updated
- 7 Jul 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: CSL will consider on a case-by-case basis requests to share Individual Patient Data (IPD) with external bona-fide, qualified scientific and medical researchers. For information on the process and requirements for submitting a voluntary data sharing request for IPD, please contact CSL at clinicaltrials@cslbehring.com.
Study at a glance
From the registry record, last updated by the sponsor on 7 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1b, Randomized, Multicenter, Placebo-controlled Study to Evaluate the Pharmacokinetics and Safety of CSL300 (Clazakizumab) in Chinese Subjects With End Stage Kidney Disease Undergoing Dialysis
- ClinicalTrials.gov ID
- NCT07619820
- Acronym / sponsor ID
- CSL300_1001
- Conditions
- End Stage Kidney Disease (ESKD)
- Keywords
- High-sensitivity C-reactive protein, High-density lipoprotein cholesterol, Interleukin-6, Humanized Monoclonal antibody, Atherosclerotic cardiovascular disease, Diabetes mellitus, Systemic inflammation
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 24 participants (estimated)
- Lead sponsor
- CSL BehringIndustry (pharma, biotech, devices)
- Study start
- 17 Jun 2026 (actual)
- Primary completion
- 30 Aug 2027 (estimated)
- Study completion
- 30 Nov 2027 (estimated)
- First posted
- 2 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a phase 1b, partial-blind (Sponsor unblinded), randomized, multicenter, placebo-controlled study. The primary objective of this study is to evaluate the pharmacokinetics (PK) of CSL300 after single and multiple doses in Chinese participants with end stage kidney disease (ESKD) undergoing dialysis.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
- Model description
- Partial-blind (Sponsor unblinded), randomized, multicenter, placebo-controlled study.
| Arm | Type | Receives |
|---|---|---|
| CSL300 (Clazakizumab) | Experimental | Biological: CSL300Participants will receive CSL300 once every 4 weeks (Q4W) as a slow intravenous (IV) bolus, for a total of 20 weeks during the Treatment Period. |
| Placebo | Placebo comparator | Other: PlaceboParticipants will receive a placebo matching to CSL300 Q4W as a slow IV bolus, for a total of 20 weeks during the treatment period. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- Participants has provided written informed consent and is willing and able to adhere to all protocol requirements.
- Aged 18 or older, inclusive, at the time of providing written informed consent.
- Diagnosis of ESKD undergoing maintenance dialysis for at least 12 weeks before Screening.
Key exclusion criteria (9 listed)
- Exclusion related to risk of infection: concomitant use of systemic immunosuppressant agents, primary immunodeficiency, positive test for active tuberculosis (TB), history of latent TB without completion of full course of prophylactic treatment, evidence of human immunodeficiency virus infection during Screening, seropositivity for hepatitis B surface antigen or positive hepatitis B virus (HBV) DNA during Screening, seropositivity for hepatitis C virus ribonucleic acid during Screening, diagnosis of clinically significant active infection, history of / OR current invasive fungal infection OR other opportunistic infection OR recurrent cellulitis (defined as 2 or more episodes in the year prior to screening), administration of a live vaccine within 6 weeks of start of Screening, presence of urinary catheter, or evidence of wet gangrene or nonhealing ulcers.
- Exclusion related to laboratory abnormalities: abnormal liver function tests, neutropenia, thrombocytopenia, or significant anemia.
- Exclusion related to medical history: any life-threatening disease expected to result in death within 12 months (other than cardiovascular disease), evidence of active hepatic disease and / or moderate or severe hepatic impairment, recent unplanned hospitalization (< 30 days) prior to Screening, recent (< 3 months) major surgery or planned major surgery known at the time of Screening, poorly controlled hypertension, a present or previous (< 5 years) malignancy except for basal cell carcinoma, fully excised squamous cell carcinoma of the skin, or nonrecurrent (< 5 years of Screening) cervical carcinoma in situ, active or recent (< 30 days of Screening) clinically severe bleeding, a scheduled kidney transplant within 6 months of Screening, a history of anaphylaxis or hypersensitivity to CSL300 or any constituents of the product, or a history of demyelinating disorders.
- Exclusion related to risk of gastrointestinal perforation: a history of GI perforation, inflammatory bowel disease (except fully excised ulcerative colitis), or peptic ulcer disease (< 12 months before Screening), a history of diverticular disease or diverticulitis (except if disease has been fully excised). An incidental finding of diverticulosis (presence of small diverticula) and no history of symptoms, complications, or any episodes requiring treatment may be eligible for the study based on investigator's judgment. However, any history of complications, inflammation, or infection suggestive of diverticulitis or diverticular disease is exclusionary, inflammatory bowel disease (ie, Crohn's disease, ulcerative colitis except if fully excised, or prior gastric bypass surgery.
- Exclusion related to treatment compliance: evidence of inadequate dialysis, unwillingness or inability to comply with study procedures, a history of noncompliance with medical treatments, or ongoing alcohol or illicit substance abuse.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| CSL300CSL300 is a humanized anti-interleukin 6 (anti-IL-6) monoclonal antibody (mAb). | Biological | CSL300 (Clazakizumab) |
| PlaceboPlacebo is a solution for injection matching the excipient content and concentration of the CSL300 product, minus the active ingredient. | Other | Placebo |
Primary outcome
Area Under the Concentration-time (AUC) Curve of CSL300 Over 1 Dosing Interval After Multiple Doses (AUC0-tau,MD)
Time frame: Day 85 up to Day 113
Trough Concentration at Steady State (Ctrough,ss)
Time frame: Up to Day 141
10 secondary outcomes
Number of Participants With Treatment Emergent Adverse Events (TEAEs), Serious Adverse Events (SAEs), and Adverse Event of Special Interests (AESIs)
Time frame: Up to Day 225 (End of Study [EoS])
Percentage of Participants With TEAEs, SAEs, and AESIs
Time frame: Up to Day 225 (EoS)
Percentage of Participants With a Clinically Significant Change From Baseline in Laboratory Test Results
Time frame: At Baseline and up to Day 225 (EoS)
Number of Participants With Antidrug Antibodies
Time frame: At Days 1, 29, 85, and 169
Maximum Observed Concentration (Cmax) of CSL300
Time frame: Up to Day 169
Area Under the Concentration-Time Curve From Time 0 to Day 28 (AUC0-28d) of CSL300
Time frame: Up to Day 28
Trough Concentration (Ctrough) of CSL300
Time frame: Up to Day 141
Time to Reach Cmax (Tmax) of CSL300
Time frame: Up to Day 85
Change From Baseline on log-scale High-Sensitivity C-reactive Protein (hs-CRP)
Time frame: At Baseline, Week 12, and Week 24
Plasma Interleukin-6 (IL-6) Free and Total Levels
Time frame: At Weeks 12 and 24
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Jul 2026.
- Individual participant dataSharing planned: Yes. CSL will consider on a case-by-case basis requests to share Individual Patient Data (IPD) with external bona-fide, qualified scientific and medical researchers. For information on the process and requirements for submitting a voluntary data sharing request for IPD, please contact CSL at clinicaltrials@cslbehring.com.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing CSL300 in people with End Stage Kidney Disease (ESKD), run by CSL Behring at 1 site in China.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 7 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Trial Registration Coordinator (+16108784697, clinicaltrials@cslbehring.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Area Under the Concentration-time (AUC) Curve of CSL300 Over 1 Dosing Interval After Multiple Doses (AUC0-tau,MD) (time frame: Day 85 up to Day 113). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Jul 2026.