ClinicalTrials.gg
TerminatedNCT06264921Updated Sep 25, 2025

A Study With NKT3447 for Adults With Advanced/Metastatic Solid Tumors

A Phase 1 interventional study of NKT3447 in Solid Tumor, Solid Tumor, Adult and Advanced Solid Tumor, sponsored by NiKang Therapeutics, Inc.. Terminated at 8 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-09-25.

Sponsored by NiKang Therapeutics, Inc. · Phase 1, Interventional, and Treatment

Why this study was terminated
This study was terminated as a result of Sponsor portfolio reprioritization.

From the registry’s dates

  • Primary completion was Apr 2025, 1 year 7 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
23
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 2,053 studies in Neoplasm Metastasis with a site in United States — 347 open to participants now, 543 under way, 58 of them phase 3. Neoplasm Metastasis · United States.

Enrollment
1,311th of 1,862
23 · median 43
Started
2024
with 76 others
Phase 1
709 of 2,053
130 open now
Registered
1,845th of 2,053
by date

Among the 2,053 studies in Neoplasm Metastasis with a site in United States, this one is the 1,311th largest by enrollment of the 1,862 interventional ones that give a count, is one of 77 that started in 2024, is one of 709 in phase 1, and was the 1,845th registered.

Neoplasm Metastasis

4,040 studies on the registry are indexed under Neoplasm Metastasis; 886 are open to participants now.

Browse Neoplasm Metastasis studies →

Open to participants now

347 of the 2,053 studies in Neoplasm Metastasis with a site in United States are open now. Recruiting first, the newest first:

342 more — sign in →

All 347 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 688 Neoplasm Metastasis studies recruiting now, 536 (78%) set no upper age limit and 97 (14%) stop at 75 or younger; 48 take children under 18; 18 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

Was this useful?
Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 2,053 studies in Neoplasm Metastasis with a site in United States, or all of them as a file.
02

Study summary

The goal of the Dose Escalation phase of the study is to evaluate the safety, tolerability, and pharmacokinetics (PK) to determine the maximum tolerated dose (MTD) and/or preliminary recommended dose for expansion (RDE) of NKT3447 in adults with advanced or metastatic solid tumors. The goal of the Expansion phase of the study is to evaluate the safety, tolerability, pharmacokinetics (PK), and the preliminary antitumor activity of NKT3447 in adult subjects with cyclin E1 (CCNE1) amplified ovarian cancer at the RDEs selected in Dose Escalation and to determine the preliminary recommended phase 2 dose (RP2D).

Read the detailed description

This is a Phase 1/1b, first-in-human, open-label, multicenter study of NKT3447 in adults with advanced/ metastatic solid tumors. The study consists of 2 parts, a Dose Escalation phase and a Dose Expansion phase. Eligible patients must have confirmed advanced/metastatic solid tumors (as outlined below) with disease progression on prior standard treatment, intolerance to or ineligibility for standard treatment, or no available standard treatment likely to improve the disease outcome in the judgment of the investigator.

Dose Escalation:

  1. Ovarian cancer
  2. Endometrial cancer
  3. Gastric cancer or gastroesophageal junction cancer
  4. Small cell lung cancer
  5. Triple-negative breast cancer (human epidermal growth factor receptor 2, estrogen receptor, progesterone receptor negative)
  6. Estrogen receptor/progesterone-receptor positive (ER+/PR+), human epidermal growth factor receptor 2 negative (HER2-) breast cancer (must have progressed following treatment with a CDK4/6 inhibitor, and not suitable for endocrine therapy)
  7. Other solid tumors with CCNE1 amplification as determined by next generation sequencing by local liquid or tissue biopsy.

Dose Expansion:

a. Platinum resistant or refractory ovarian cancer (defined as recurrence ≤6 months after completing platinum-based regimen) with progression on at least 1 platinum containing therapy with cyclin E amplification as determined by fluorescence in situ hybridization, quantitative polymerase chain reaction, or next-generation sequencing by local liquid or tissue biopsy.

The Dose Escalation phase will evaluate the safety, tolerability, and pharmacokinetics (PK) to determine the maximum tolerated dose (MTD) and/or preliminary recommended dose for expansion (RDE) of NKT3447 in adults with advanced or metastatic solid tumors.

The Dose Expansion phase will evaluate the safety, tolerability, pharmacokinetics (PK), and the preliminary antitumor activity of NKT3447 in adult subjects with CCNE1 amplified ovarian cancer at the RDEs selected in Dose Escalation and to determine the preliminary recommended RP2D.

03

Conditions studied

  • Solid Tumor
  • Solid Tumor, Adult
  • Advanced Solid Tumor
  • Metastatic Tumor
  • Ovarian Cancer
  • Ovarian Neoplasms
  • Ovarian Carcinoma
  • Metastatic Ovarian Carcinoma
  • Endometrial Cancer
  • Endometrial Neoplasms
  • Endometrial Diseases
  • Metastatic Endometrial Cancer
  • Metastatic Endometrial Carcinoma
  • Advanced Endometrial Carcinoma
  • Advanced Ovarian Carcinoma
  • Gastric Cancer
  • Advanced Gastric Carcinoma
  • Metastatic Gastric Cancer
  • Metastatic Gastric Carcinoma
  • Small-cell Lung Cancer
  • Small Cell Lung Carcinoma
  • Triple Negative Breast Cancer
  • Triple Negative Breast Neoplasms
  • Platinum-resistant Ovarian Cancer
  • Platinum-refractory Ovarian Carcinoma
  • CCNE1 Amplification
  • Hormone Receptor Negative Breast Carcinoma
  • Human Epidermal Growth Factor 2 Negative Carcinoma of Breast
  • Progesterone-receptor-positive Breast Cancer

Keywords

  • CDK 2 Inhibitor
  • CDK 4 Inhibitor
  • CDK 6 Inhibitor
04

Who can participate

Ages eligible
18 Years and older
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

  • Must have confirmed unresectable advanced/ solid tumors (as outlined below) with disease progression on prior standard treatment, intolerance to or ineligibility for standard treatment, or no available standard treatment likely to improve the disease outcome in the judgment of the Investigator.

    • per the v1.1
    • An (ECOG) performance status of 0 to 1
    • Able to swallow oral medications.

Dose Escalation(Part 1):

  1. Ovarian cancer
  2. Endometrial cancer
  3. Gastric cancer or gastroesophageal junction cancer
  4. Small cell lung cancer (SCLC)
  5. Triple-negative breast cancer (human epidermal growth factor receptor 2 [], estrogen receptor [ER], progesterone receptor negative)
  6. ER/progesterone-receptor positive, HER2 negative breast cancer (must have progressed following treatment with a CDK4/6 inhibitor, and not suitable for endocrine therapy)
  7. Other solid tumors with CCNE1 amplification as determined by NGS by local liquid or tissue .

Dose Expansion (Part 2):

a. Platinum resistant or ovarian cancer (defined as recurrence ≤6 months after completing platinum-based regimen) with progression on at least 1 platinum containing therapy with CCNE1 amplification as determined by NGS by local liquid or tissue biopsy.

  • Measurable disease per the RECIST v1.1
  • An Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1
  • Able to swallow oral medications.

Exclusion criteria

Exclusion Criteria:

  • Locally advanced solid tumor that is a candidate for curative treatment through radical surgery and/or radiotherapy, or chemotherapy.
  • History of another with exceptions
  • Visceral crisis with life-threatening complications, lymphangitic spread, and/or carcinomatous meningitis
  • Failed to recover from effects of prior anticancer treatment therapy to baseline or Grade ≤ 1 severity (per )
  • Clinically active interstitial lung disease
  • History of uveitis, retinopathy or other retinal disease
  • Has known (HIV), active or C infection
  • Prior CDK2 inhibitor
  • Major surgery within 2 months or minor surgery within 10 days before the first dose of NKT3447
Terms in these criteria, in plain language(13)

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.

Metastases

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

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

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.

HER2

HER2 is a protein, made from the ERBB2 gene, that drives the growth of some cancers. A study may look for a level of the protein, extra copies of the gene, or a particular change in it.

In breast cancer, protein tests are read as HER2-positive, HER2-low or HER2-negative; other cancers use their own rules. Check which test result the study requires.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

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.

Brain metastases

Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).

Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.

CTCAE grade

The US National Cancer Institute’s scale of how severe an adverse event is — any unwanted medical event during a study, such as a symptom, an illness or an abnormal test result, whether or not a treatment caused it. Whether it did is judged separately.

1
Mild.
2
Moderate.
3
Severe.
4
Life-threatening.
5
Death due to the event.

“Side effects of earlier treatment resolved to grade 1 or less” means they have settled to mild or gone.

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.

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.

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.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
23 participants (actual)

Study arms

  • Experimental
    Dose Escalation

    Dose escalation will assess the safety, efficacy, and PK/PD data of oral dosing NKT3447 at increasing dosage levels to determine the MTD and/or preliminary RDEs.

    Drug: NKT3447

  • Experimental
    Dose Expansion

    Dose expansion will include 2 RDEs selected to determine the preliminary antitumor activity and the RP2D.

    Drug: NKT3447

Interventions

  • DrugNKT3447

    Oral CDK2 inhibitor

06

What researchers measure

Primary outcomes

  1. Number of Participants with Dose Limiting Toxicity (DLT) events

    DLTs graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 5 .0.

    Time frame: 28 days

  2. Objective Response Rate (ORR)

    ORR defined as the percentage of participants with a confirmed complete response (CR) or partial response (PR) by Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST v1.1) as determined by the Investigator

    Time frame: 1 year

Secondary outcomes

  1. Progression-free survival (PFS)

    PFS defined as the time from the date the participant started study drug to the date the participant experiences an event of disease progression or death.

    Time frame: 2 years

  2. Duration of Response (DOR)

    Duration of overall response is defined as the time from the date of first documented CR or PR, assessed by investigator and based on RECIST v. 1.1, to the documented date of progressive disease (PD) or death, whichever occurred first.

    Time frame: 2 years

  3. Disease control rate

    Disease control rate defined as CR + PR + stable disease \[SD\]

    Time frame: 1 year

  4. Overall Survival (OS)

    OS defined as the time from the date the participant started study drug to death for any reason.

    Time frame: 2 years

  5. Time to Response (TTR)

    TTR is defined as the time from first dose to the first documented CR or PR which is subsequently confirmed.

    Time frame: 1 year

  6. Number of Participants with Adverse Events

    An adverse event (AE) is defined as any untoward medical occurrence in a patient and which does not necessarily have a causal relationship with this treatment. The investigator assessed the relationship of each event to the use of study drug as either probably related, possibly related, probably not related or not related.

    Time frame: 2 years

  7. Maximum observed plasma concentration (Cmax) of NKT3447

    Maximum observed plasma concentration (Cmax) of NKT3447

    Time frame: 1 month

  8. Time to maximum observed plasma concentration of NKT3447 (Tmax)

    Time to maximum observed plasma concentration of NKT3447 (Tmax)

    Time frame: 1 month

  9. Observed trough concentration of NKT3447 (Ctrough)

    Observed trough concentration of NKT3447 (Ctrough)

    Time frame: 88 weeks

  10. Area under the plasma concentration-time curve (AUC0-t) of NKT3447

    Area under the plasma concentration-time curve (AUC0-t) of NKT3447

    Time frame: 1 month

  11. Apparent clearance (CL/F)

    Apparent clearance (CL/F)

    Time frame: 1 month

  12. Apparent volume of distribution (V/F)

    Apparent volume of distribution (V/F)

    Time frame: 1 month

  13. Half-life (t1/2)

    Half-life (t1/2)

    Time frame: 1 month

  14. Accumulation ratio (AR)

    Accumulation ratio (AR)

    Time frame: 1 month

07

Study locations

8 sites
  • University of California San Francisco (UCSF) - Helen Diller Family Comprehensive Cancer Center
    San Francisco, California 94158, United States
  • Sarah Cannon Research Institute at HealthONE
    Denver, Colorado 80218, United States
  • AdventHealth Cancer Institute
    Celebration, Florida 34747, United States
  • Augusta University Georgia Cancer Center
    Augusta, Georgia 30909, United States
  • Norton Cancer Institute - Broadway
    Louisville, Kentucky 40202, United States
  • The Gabrail Pharmacology Phase 1 Research Center
    Canton, Ohio 44718, United States
  • Texas Oncology-Austin Midtown NEXT Oncology
    Austin, Texas 78758, United States
  • START Mountain Region
    West Valley City, Utah 84119, United States
08

References and documents

Individual participant data

Plan to share: No — IPD are not planned to be shared at this time

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Feb 2024 to primary completion in Apr 2025, 13 months.

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

Registered
Feb 9, 2024
First posted
Feb 20, 2024
StartActual
Feb 23, 2024
Primary completionActual
Apr 7, 2025
CompletionActual
Apr 16, 2025
Last update
Sep 25, 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 Sep 25, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06264921
Lead sponsor
NiKang Therapeutics, Inc.
Responsible party
Sponsor
First posted
Feb 20, 2024
Start date
Feb 23, 2024
Primary completion
Apr 7, 2025
Completion
Apr 16, 2025
Last update
Sep 25, 2025

Oversight

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

Not currently enrolling

This study is terminated, as verified in Sep 2025. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions 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.

Start the discussion