A Phase 1 interventional study of PG-033 and PG-033 placebo comparator in Lichen Simplex Chronicus, sponsored by Prime Gene Therapeutics Co., Ltd.. Recruiting at 1 site in China. Open to participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-06-02.
Sponsored by Prime Gene Therapeutics Co., Ltd. · Phase 1, Interventional, and Treatment
The goal of this study is to evaluate the safety, tolerability and pharmacokinetics (PK) profiles of single ascending oral doses(SAD) of PG-033 by directly comparing it with placebo. Meanwhile, the impact of a high-fat meal on the pharmacokinetics of PG-033 will also be evaluated. The research will also explore the potential metabolites and metabolic pathways of PG-033 within the human body，as well as investigate the effect of PG-033 on the QTc interval.
This is a single-center, randomized, double-blind, placebo-controlled, single-dose administration, and dose escalation phase I clinical study in adult participants aged from 18 to 45 years old (including threshold) with healthy male and female subjects. The study includs a single dose ascending study (SAD) and a food effect (FE) study.
The single ascending dose (SAD) study will be conducted by increasing the dosage from low dosage level to high. Approximately 40 participants will be randomized 3:1 to PG-033 or placebo in 5 dose groups.
The food effect study adopts a single-center, randomized, open-label, single-dose, two-period and two-sequence crossover clinical trial design. 12 participants will be randomly divided into group A and group B, with 6 participants in each group. In the first period, the 6 subjects in Group A will take PG-033 on an empty stomach, while the 6 subjects in Group B will take PG-033 after having a high-fat meal. In the second period, the two groups will cross over in taking the drug. That is, the subjects in Group A will take PG-033 after having a high-fat meal, and the subjects in Group B will take PG-033 on an empty stomach. The washout period between the two dosing periods is 7 days.
22 studies on the registry are indexed under Neurodermatitis; 3 are open to participants now.
This study's planned enrollment of 52 is above the median of 44 across 22 interventional studies indexed under Neurodermatitis.
Browse Neurodermatitis studies →Prime Gene Therapeutics Co., Ltd. is the lead sponsor of 5 studies on the registry; 4 are open to participants now.
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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.
1. Read, understood, and signed an ICF before any procedure(s) are performed.
2.Male or female aged 18 to 45 (including threshold). 3. For male subjects, the body weight should be ≥ 50.0 kg, and for female subjects, the body weight should be ≥ 45.0 kg. The (BMI) should be within the range of 19.0 to 26.0 kg/m²(including threshold).
4. Results of vital signs examination, physical examination, clinical laboratory tests (including blood routine examination, urine routine examination, blood biochemistry examination, coagulation function examination, thyroid function examination, etc.), chest X-ray, adrenal gland color ultrasound, etc. during the screening period show normal results or, if there are abnormalities, they are judged by the investigator to have no clinical significance.
5. Be willing to avoid pregnancy or voluntarily take effective measures and have no sperm or egg donation plan from the signing of the form to three month after the last administration of the investigational medicinal product.
6. Be able to communicate well with the investigator and understand and comply with the requirements of the study.
Exclusion Criteria:
1. Participants with abnormal results during screening (e.g., /QTcF > 440 ms, PR interval > 200 ms, QRS complex duration > 100 ms, abnormalities of the P wave, clinically significant changes in the ST-T wave, etc.).
2. Participants known to be allergic to this product or related ; or participants with an allergic constitution (such as those who are allergic to two or more drugs or foods).
3. Participants with a history of chronic diseases or severe diseases in the circulatory, urinary, respiratory, hematological and lymphatic, endocrine, immune, mental and neurological, digestive systems, etc.
4. Participants who have undergone major surgery within 6 months before the first dose administration, or those who plan to have surgery during the study period, or those who have undergone surgery that, as judged by the investigator, will affect the evaluation of the drug's safety and pharmacokinetic characteristics.
5. Participants who have used any drugs (including any prescription drugs, over-the-counter drugs, traditional Chinese herbal medicines) and health products within 2 weeks before the first dose administration.
6. Participants who have used any drugs that inhibit or induce the liver's metabolism of drugs (e.g., barbiturates, carbamazepine, phenytoin, , omeprazole, selective serotonin reuptake inhibitors (SSRI) antidepressants, cimetidine, diltiazem, macrolides, nitroimidazoles, sedative-hypnotics, verapamil, fluoroquinolones, antihistamines, etc.) within 4 weeks before the first dose administration.
7. Participants who are unable to stop consuming beverages and foods containing caffeine, alcohol, etc. (including chocolate, tea, coffee, cola, etc.), or foods that affect drug metabolism such as grapefruit, grapefruit products, pitaya, mango, pomelo, etc. from 48 hours before the first dose administration until the end of the trial, or those who are unable to stop consuming the above-mentioned diets from 48 hours before the first dose administration until the end of the trial.
8. Participants who have received vaccination within 4 weeks before the first dose administration or those who need to receive live attenuated vaccine vaccination during the trial.
9. Participants with positive serological results for surface antigen (HBsAg), antibody, Treponema pallidum antibody, or antibody during screening.
10. Participants who have participated in other clinical trials within 3 months before the first dose administration.
11. Participants who have donated blood or lost a total of ≥ 400 mL of blood (excluding physiological blood loss in females) within 3 months before the first dose administration, received blood transfusion or used blood products, or those who plan to donate blood during the trial or within 1 month (30 days) after the end of the trial.
12. Participants who have consumed an average of more than 2 units of alcohol per day within 30 days before screening (1 unit ≈ 360 mL of beer or 45 mL of liquor with an alcohol content of 40% or 150 mL of wine), or those who cannot abstain from alcohol during the trial, or those with a positive result in the alcohol breath test.
13. Participants who have smoked an average of more than 5 cigarettes per day within 3 months before screening, or those who cannot stop smoking during the trial.
14. Participants with a history of drug abuse within 1 year before screening or those who tested positive for drug abuse screening.
15. Participants who cannot tolerate intravenous puncture/indwelling needle or those with a history of fainting at the sight of needles or blood.
16. Participants with special dietary requirements and who cannot accept the unified diet.
17. Pregnant or lactating women; 18. Other participants determined by the investigator to be unsuitable for participation.
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.
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.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
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.
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.
A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.
On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.
The study may name a correction formula and a limit in milliseconds, often around 450–480.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.
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.
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.
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.
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.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
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.
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.
ECG (electrocardiogram)
A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
QT and QTc
On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.
The study may name a correction formula and a limit in milliseconds, often around 450–480.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Excipients
The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Live vaccines
Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.
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.
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.
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.
Drug: PG-033
Drug: PG-033 placebo comparator
Oral tablets (2mg， 10mg)
Oral tablets (2 mg, 10 mg) (matching corresponding study medication)
Safety and tolerability of PG-033 tablets
Incidence of treatment-emergent adverse events (AEs) and serious adverse events (SAEs)
Time frame: Single Ascending Dose study: 7 days；Food Effect study: 14 days
Pharmacokinetics parameter: Cmax
Maximum Observed Plasma concentration (Cmax)
Time frame: up to 3 days
Pharmacokinetics Parameter:Tmax
Time at which the maximum plasma concentration (Cmax) occurs
Time frame: up to 3 days
Pharmacokinetics parameter: AUC0-t
Area under the plasma concentration-time curve from dosing (time zero） to the time of the last measured concentration
Time frame: up to 3 days
Pharmacokinetics parameter: AUC0-∞
Area Under the Plasma Concentration Versus Time Curve from Zero Extrapolated to Infinity (AUC0-∞）
Time frame: up to 3 days
Pharmacokinetics parameter: t1/2
Terminal Elimination Half-Life (t1/2)
Time frame: up to 3 days
Pharmacokinetics parameter: Vd/F
Volume of Distribution (Vd/F)
Time frame: up to 3 days
Pharmacokinetics parameter: CL/F
Total Body Clearance
Time frame: up to 3 days
Pharmacokinetics parameter: λZ
Elimination rate constant (λz)
Time frame: up to 3 days
Pharmacokinetics parameter: MRT
Mean retention time (MRT)
Time frame: up to 3 days
Corrected QT interval
Change in QT interval corrected for heart rate (QTc) interval from baseline
Time frame: up to 24 hours post-dose
Plan to share: No
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Prime Gene Therapeutics Co., Ltd.