An Early Phase 1 interventional study of YOLT-203 in Type 1 Primary Hyperoxaluria, sponsored by Guangzhou Women and Children's Medical Center. Active, not recruiting at 1 site in China. Open to participants aged 2 Years to 18 Years. Per ClinicalTrials.gov, last updated 2025-03-24.
Sponsored by Guangzhou Women and Children's Medical Center · Early Phase 1, Interventional, and Treatment
This study is a single-arm, open-label, single-dose, dose-escalation trial, aiming to evaluate the safety and tolerability of YOLT-203 in the Chinese population with type 1 primary hyperoxaluria (PH1); and to preliminarily assess the effect of a single dose of YOLT-203 on the plasma oxalate level.In this study, the maximum screening period of the main study is 60 days, the treatment day is Day 1 (D1), and the safety follow-up period is up to Week 52 after administration. In addition, subjects within the first dose group can voluntarily receive a second treatment with the test drug at the effective dose level. After the end of the main study, the subjects will undergo long-term followup. According to the requirements of the "Technical Guidelines for Long-Term Follow-up Clinical Studies of Gene Therapy Products (Trial)" issued by the CDE, the long-term follow-up is up to 15 years after administration. The most updated protocol is V1.2 , 22 Jan 2025
22 studies on the registry are indexed under Primary hyperoxaluria type 1; 8 are open to participants now.
This study's planned enrollment of 2 is below the median of 28 across 16 interventional studies indexed under Primary hyperoxaluria type 1.
Browse Primary hyperoxaluria type 1 studies →Guangzhou Women and Children's Medical Center is the lead sponsor of 58 studies on the registry; 30 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
The age is 2≤ years \<18 years old at the time of signing the .
Exclusion Criteria:
The investigator judges that there is clinical evidence of systemic extrarenal oxalate deposition.
Have any of the following laboratory parameter assessment results at screening:
Page 4 of 5 [DRAFT] -
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.
Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GFR and eGFR (kidney filtering)
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
INR, PT and aPTT (clotting tests)
Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.
Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
YOLT-203
Drug: YOLT-203
The IP is administered intravenously at the predetermined dose.
Incidence of Treatment-Emergent Adverse events
An Adverse Event(AE) is any untoward medical occurrence in a participant or clinical investigational participant adminstered a medicinal product and which does not necessarily have a casual relationship with this treatment
Time frame: through week 52
The Peak Plasma Concentration (Cmax) of YOLT-203
The Peak Plasma Concentration (Cmax) of YOLT-203 in the plasma after a dose is given
Time frame: through Day 14
Area under the plasma concentration versus time curve (AUC)of YOLT-203
Area under the plasma concentration versus time curve (AUC). 0.5 predose,6,24,48,144,and312 hours after treatment
Time frame: through Day 14
Time to Maximum Plasma Concentration (Tmax)of YOLT-203
Tmax is the time it takes for YOLT-203 to reach the maximun concentration (Tmax) after administration
Time frame: through Day 14
Drug half-life (T1/2)of YOLT-203
The amount of time it takes for the plasma YOLT-203 drug concentration to drop to half
Time frame: through Day 14
The changes in blood glycolic acid levels
After medication, at 1, 2, 4, 8, 16, 24, 36, and 52 weeks, the changes in blood glycolic acid levels
Time frame: through week 52
The changes in 24-hour urinary oxalic acid excretion
After medication, at 1,2,4, 8, 16, 24, 36and 52 weeks, the changes in 24-hour urinary oxalic acid excretion compared to the baseline value.
Time frame: through week 52
The changes in 24-hour urinary glycolic acid excretion
After medication, at 1, 2, 4, 8, 16, 24, 36, and 52 weeks, the changes in 24-hour urinary glycolic acid excretion
Time frame: through week 52
The changes in eGFR
After medication, at 1, 2, 4, 8, 16, 24, 36, and 52 weeks, the changes in eGFR.
Time frame: through week 52
This study is active, not recruiting, as verified in Feb 2025. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Primary hyperoxaluria type 1 →
Guangzhou Women and Children's Medical Center