Evaluation of the Effect of Cordycepin on CD8+ Lymphocytopenia in Patients With Solid Tumors

NCT ID: NCT07258160

Last Updated: 2026-01-09

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: PHASE2
• Total Enrollment: 127 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-12-01
• Study Completion Date: 2026-09-30

Brief Summary

The goal of this clinical trial is to evaluate the effectiveness of PRaG-1 in improving CD8+ lymphocytopenia in patients with solid tumors who are tumor-free for more than six months after completing radiotherapy and/or chemotherapy. It will also assess the safety of PRaG-1 Cordycepin in these patients. The main questions it aims to answer are:

Does PRaG-1 increase CD8+ lymphocyte counts by more than 25% in this patient population? Does the effect of PRaG-1 maintain when treatment is discontinued? What are the safety and tolerability profiles of PRaG-1 during and after the treatment period? Participants will receive open-label PRaG-1 (one tablet in the morning and one in the evening) for 14 days, and those who show a response (CD8+ lymphocytes increase by more than 25%) will enter a 14-day randomized withdrawal period, where they will be assigned to continue PRaG-1 or switch to a placebo.

Throughout the study, participants will:

Have their peripheral blood lymphocyte subpopulations tested at baseline and on Days 7 and 14 Undergo safety monitoring for adverse events according to CTCAE 5.0 criteria Provide information on their quality of life during the treatment period Researchers will compare the outcomes of those who continue PRaG-1 to those who receive a placebo to determine if the observed improvement in CD8+ lymphocytes is sustained, which would indicate that the drug is effective in maintaining immune response.

Detailed Description

Cordycepin: The PRaG-1 cordycepin tablets used in this clinical study were produced by Shengmingyuan Company, which is affiliated with the National Bioprocess Engineering Research Center at Nanjing Tech University. The tablets are oral formulations containing 200 mg of cordycepin per tablet and have obtained national food production approval. The production license number is: SC11332019200201.

This study is a multicenter, prospective, placebo-controlled, two-stage sequential design, randomized withdrawal trial. Patients with CD8+ lymphocytopenia who have been tumor-free for more than six months following the completion of radiotherapy and/or chemotherapy were screened. All patients first received open-label PRaG-1 at a dose of one tablet in the morning and one tablet in the evening for 14 days. Patients whose CD8+ lymphocytes increased by more than 25% were defined as treatment responders and entered the randomized withdrawal phase. The study population was enrolled in two stages into the open-label phase and then randomized accordingly. The alpha level for the two-stage testing was allocated using the Pocock method (both stages at 0.029). In the first stage, 80 subjects were enrolled in the open-label phase, and 48 of them entered the withdrawal trial. If the first stage met the superiority hypothesis, the trial would terminate; otherwise, it would proceed to the second stage. In the second stage, 47 subjects were enrolled in the open-label phase, and 28 of them entered the withdrawal trial. Data from both stages were combined for the final superiority test. Centralized randomization was used in both stages, with patients assigned in a 1:1 ratio to continue receiving PRaG-1 or to receive a placebo at one tablet in the morning and one tablet in the evening for 14 days. Peripheral blood lymphocyte subpopulations were measured on the day before treatment (baseline), and on Days 7, 14, 21, and 28 of the treatment period. The primary endpoint was the proportion of patients whose CD8+ lymphocytes decreased by more than 25% from baseline after the withdrawal period. Secondary endpoints included lymphocyte dynamics during the entire treatment period and quality of life scores. Safety endpoints included adverse events occurring during treatment and within four weeks after treatment, which were graded according to the CTCAE 5.0 criteria.

Conditions

Solid Cancer; Lymphopenia

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: SEQUENTIAL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: DOUBLE

Study Groups

PRaG-1

Group Type: EXPERIMENTAL

PRaG-1

Intervention Type: DRUG

The PRaG-1 cordycepin tablets used in this clinical study were produced by Shengmingyuan Company, which is affiliated with the National Bioprocess Engineering Research Center at Nanjing Tech University. The tablets are oral formulations containing 200 mg of cordycepin per tablet and have obtained national food production approval. The production license number is: SC11332019200201.

Placebo

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: DRUG

Placebo

Interventions

PRaG-1

The PRaG-1 cordycepin tablets used in this clinical study were produced by Shengmingyuan Company, which is affiliated with the National Bioprocess Engineering Research Center at Nanjing Tech University. The tablets are oral formulations containing 200 mg of cordycepin per tablet and have obtained national food production approval. The production license number is: SC11332019200201.

Intervention Type: DRUG

Placebo

Placebo

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

1. Age ≥ 18 years;

2. Participants with solid malignant tumors, with confirmed pathological diagnosis or medical history; they have completed radiotherapy and/or chemotherapy more than six months ago; and peripheral blood CD8+ absolute count (blood drawn before 10:00 AM) below the lower reference limit (LRL);

3. No treatment with immunomodulatory or immunosuppressive agents within the past 2 weeks prior to enrollment;

4. ECOG performance status score of 0-1, with an estimated life expectancy of ≥ 3 months;

5. AST and ALT ≤ 3.0 times the upper limit of normal (ULN) within one week prior to study enrollment; serum creatinine ≤ 2 times ULN;

6. Ability to understand the study and voluntarily provide written informed consent.

Exclusion Criteria

1. History of uncontrolled epilepsy, central nervous system (CNS) disease, or mental disorders, as determined by the investigator to be clinically significant and potentially interfere with the participant's ability to provide informed consent or comply with medication;

2. Significant (i.e., active) cardiovascular disease, including symptomatic coronary heart disease, congestive heart failure classified as New York Heart Association (NYHA) Class II or worse, or serious arrhythmias requiring pharmacological intervention, or history of myocardial infarction within the past 12 months;

3. Known active serious infections, or in the investigator's opinion, presence of major hematological, renal, metabolic, gastrointestinal, or endocrine dysfunction, or other serious, uncontrolled comorbidities;

4. History of allergy to fungi, or to any of the following components: Cordyceps militaris extract powder, D-mannitol, maltitol, microcrystalline cellulose, or magnesium stearate;

5. History of immunodeficiency, including HIV positive status, or diagnosis with other acquired or congenital immunodeficiencies, or a history of organ transplantation, or immunological disorders requiring long-term oral corticosteroid treatment;

6. Acute gout flare

7. Any other condition deemed unsuitable for enrollment by the investigator.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Second Affiliated Hospital of Soochow University

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

The Second Affiliated Hospital of Soochow University

Suzhou, Jiangsu, China

Site Status: RECRUITING

Countries

China

Central Contacts

Liyuan Zhang, Doctor

Role: CONTACT

zhangliyuan126@126.com

0512-67784829

Facility Contacts

Junjun Zhang

Role: primary

sudazhangjunjun@126.com

051267784829

Other Identifiers

JD-LK2025016-A03

Identifier Type: -

Identifier Source: org_study_id