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Not yet recruitingNCT06991478Updated May 28, 2025

SK-NK Injection in Patients With Advanced Solid Tumors Accompanied by Malignant Ascites

A Phase 1/2 interventional study of SK-NK injection and SK-NK injection in Solid Tumor, Malignant Ascites, sponsored by Tianjin Medical University Cancer Institute and Hospital. Not yet recruiting. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2025-05-28.

Sponsored by Tianjin Medical University Cancer Institute and Hospital · Phase 1/2, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by May 2026, 5 months ago, but the record still lists the study as not yet recruiting.
Phase
Phase 1/2
Study type
Interventional
Enrollment
10
Allocation
Non-randomized
Ages
18 Years to 75 Years
Sex
All
01

Study summary

This study is divided into two phases. Patients with recurrent or metastatic solid tumors accompanied by malignant ascites who have failed previous standard treatments are enrolled. The first phase is a single-arm, open-dose exploratory Phase I clinical study. In this phase, two dose groups are preset, namely 20×108 cells and 30×108 cells. Subjects who meet the inclusion criteria will receive intravenous infusion of SK-NK injection. Once a week for 6 consecutive infusions. After completing 6 consecutive infusions of SK-NK injection, the researchers evaluated that the patient benefited and could continue to receive 6 consecutive infusions of SK-NK injection. After completing 12 infusions, whether to continue the treatment subsequently could be determined based on the patient's condition. The second stage will be based on the results of the first stage to further verify the clinical efficacy, safety, tolerability and pharmacokinetic characteristics of RP2D, etc.

02

Conditions studied

  • Solid Tumor, Malignant Ascites

Browse trials for

03

In context

Ascites

247 studies on the registry are indexed under Ascites; 57 are open to participants now.

This study's planned enrollment of 10 is below the median of 54 across 179 interventional studies indexed under Ascites.

Browse Ascites studies →

Lead sponsor

Tianjin Medical University Cancer Institute and Hospital is the lead sponsor of 494 studies on the registry; 293 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

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.

Inclusion criteria

  1. Aged 18 to 75 years.
  2. Malignant solid tumors confirmed by histology or pathology, including: advanced gastric cancer, colorectal cancer, esophageal squamous cell carcinoma, gynecological , etc. that have failed at least two .
  3. Pathological diagnosis or clinical diagnosis combined with malignant ascites, and ascites drainage is not required within one week before the administration of the study.
  4. At least one measurable tumor lesion based on V1.1 criteria.
  5. PS ≤1.
  6. Expected survival ≥12 weeks.
  7. Adequate organ function.
  8. Non-reproductive female patients, or reproductive female patients whose pregnancy test results are negative and commit to taking adequate and effective measures or abstinence from the screening period until 3 months after the last administration, or male patients commit to taking adequate and effective contraceptive measures or abstinence from the screening period until 3 months after the last administration.
  9. Understands and provides written and willing to follow the requirements specified in protocol.

Exclusion criteria

Exclusion Criteria:

  1. History of severe allergic reactions to protein drugs
  2. Have received NK cell therapy in the past.
  3. Untreated, unstable or uncontrolled central nervous system (CNS) .
  4. Tumor invasion of vital arteries resulting in high risk of bleeding, significant risk of perforation or already formed fistulae.
  5. Major surgeries within 4 weeks before enrollment or are planned to undergo major surgeries during the trial (excluding exploration surgeries).
  6. New infections or concurrent infections occurred within 14 days before enrollment and have not yet been controlled to clinical stability.
  7. Prior to the first study dose, systemic chemotherapy and anti-tumor monoclonal antibody drug therapy has been completed for at least 4 weeks; small molecule targeted drug therapy has been completed for at least 2 weeks or 5 half-lives of the drug (whichever is longer); intraperitoneal chemotherapy has been completed for at least 2 weeks; and treatment with proprietary Chinese medicines approved by the National Medicines and Pharmaceutical Administration (NMPA) as antitumor and having antitumor effects has been completed for at at least 2 weeks.
  8. Patients with severe respiratory disease at the time of screening that results in respiratory failure or who, in the judgment of the investigator, are not suitable for enrollment.
  9. Active disease.except that the following are allowed to enter the screen: type I diabetes mellitus, hypothyroidism that can be controlled by replacement therapy only, and skin conditions (e.g., vitiligo, psoriasis, or alopecia areata) not requiring systemic therapy.
  10. Patients had severe cardiovascular disease at screening, with an acute cardiovascular event or pulmonary embolism within the last 6 months or vascular stenting within 6 months; or venous thrombotic disease, such as lower extremity venous thrombosis, within the last 1 month.
  11. Intestinal obstruction or gastrointestinal bleeding within 30 days prior to enrollment.
  12. Objective reasons for not being able to drain ascites adequately (including segregation of ascites) or in combination with coeliac ascites.
  13. Confirmed portal vein embolism or portal hypertension on examination.
  14. Active chronic , active , positive (HIV) antibodies or active syphilis infection.
  15. Combined with pleural effusion and causing clinical symptoms such as chest tightness and dyspnea, requiring clinical intervention as assessed by the investigator; or combined with moderate or greater amounts of pericardial effusion and clinical symptoms.
  16. Pregnant or lactating women.
  17. Subjects who, in the judgment of the investigator, have a history of other serious systemic disease or are unfit to participate in this trial for any other reason (the presence of psychiatric disorders, alcohol, drug, or substance abuse in the patient that may affect compliance with the trial, etc.)
Terms in these criteria, in plain language(11)

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.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Line of therapy

A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.

“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

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.

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.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

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.

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.

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.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
10 participants (estimated)

Study arms

  • Experimental
    Phase 1:Dose escalation stage

    "3+3" design. SK-NK injection, Two dose groups, namely 20×108 cells and 30×108 cells.

    Drug: SK-NK injection

  • Experimental
    Phase 2:Expansion stage

    The dose of SK-NK injection selected based on the results of the first stage

    Drug: SK-NK injection

Interventions

  • DrugSK-NK injection

    In this stage, two dose groups are preset, namely 20×108 cells and 30×108 cells. Subjects who meet the inclusion criteria will receive intravenous infusion of SK-NK injection once a week for six consecutive times. After completing six consecutive infusions of SK-NK injection, the researchers evaluated that the patient benefited and could continue to receive six consecutive infusions of SK-NK injection. After completing twelve infusions, the decision on whether to continue the treatment subsequently could be made based on the patient's condition

  • DrugSK-NK injection

    Based on the dose selected from the results of the first stage, the clinical efficacy, safety, tolerability and pharmacokinetic characteristics of RP2D were further verified. The types of cancer and the number of cases enrolled in stage II are to be determined

06

What researchers measure

Primary outcomes

  1. SK-NK injection safety and tolerance

    The incidence of DLT,TEAEs and SAE, and the safety indicators before and after administration

    Time frame: up to 12 months

  2. ORR

    Antitumor efficacy of SK-NK injection

    Time frame: up to 12 months

Secondary outcomes

  1. Pharmacokinetic (PK) characteristics of SK-NK injection;

    To evaluate the Cmax of SK-NK injection in patients with advanced or metastatic malignant solid tumors accompanied by malignant ascites

    Time frame: up to 12 months

  2. DCR

    Disease control rate of SK-NK injection

    Time frame: up to 12 months

  3. PFS

    Progression-free survival of SK-NK injection

    Time frame: up to 12 months

  4. OS

    The overall survival of the enrolled patients

    Time frame: up to 12 months

  5. Pharmacokinetic (PK) characteristics of SK-NK injection

    To evaluate the t1/2 of SK-NK injection in patients with advanced or metastatic malignant solid tumors accompanied by malignant ascites

    Time frame: up to 12months

  6. Pharmacokinetic (PK) characteristics of SK-NK injection;

    To evaluate the Tmax of SK-NK injection in patients with advanced or metastatic malignant solid tumors accompanied by malignant ascites

    Time frame: up to 12months

  7. Pharmacokinetic (PK) characteristics of SK-NK injection;

    To evaluate the AUC0-last of SK-NK injection in patients with advanced or metastatic malignant solid tumors accompanied by malignant ascites

    Time frame: up to 12months

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for May 2025; primary completion for May 2026, 12 months later.

How these figures are worked out, and which studies are left out of them.

Registered
May 18, 2025
First posted
May 28, 2025
StartEst.
May 30, 2025
Primary completionEst.
May 30, 2026
CompletionEst.
Jul 30, 2026
Last update
May 28, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 28, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06991478
Responsible party
Sponsor
First posted
May 28, 2025
Start date
May 30, 2025 (estimated)
Primary completion
May 30, 2026 (estimated)
Completion
Jul 30, 2026 (estimated)
Last update
May 28, 2025

Study contacts

TING DENG
Contact
18526812877@163.com
15802243063

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in May 2025. You cannot join it, but the record below documents what was studied.

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