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A clinical study on the efficacy and safety of the novel CDK2/4/6 inhibitor cummeciclib in the treatment of patients with advanced HR+/HER2- breast cancer

A clinical study on the efficacy and safety of the novel CDK2/4/6 inhibitor cummeciclib in the treatment of patients with advanced HR+/HER2- breast cancer

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2600129581
Enrollment
Unknown
Registered
2026-08-06
Start date
2026-08-11
Completion date
Unknown
Last updated
2026-08-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

HR+/HER2- advanced breast cancer

Interventions

Cummeciclib arm:Cummeciclib in combination with endocrine therapy

Sponsors

The affiliated people's hospital of Ningbo University
Lead Sponsor

Eligibility

Sex/Gender
Female
Age
18 Years to 80 Years

Inclusion criteria

Inclusion criteria: 1. Females aged 18 and above; 2. ECOG Performance Status score of 0 to 1; 3. Histologically or cytologically confirmed HR+/HER2- metastatic breast cancer; 4. HER2 negativity must be confirmed in both the primary tumor and metastatic sites (where biopsy results are available); 5. Radiographically evaluable metastatic disease; 6. Prior endocrine therapy for advanced disease limited to <=2 lines; 7. Prior chemotherapy for advanced disease limited to <=2 lines, including ADC-containing regimens; 8. All toxicities related to previous antitumor treatments must have recovered to <= grade 1 (CTCAE v5.0); 9. Asymptomatic central nervous system metastases are allowed for enrollment; 10. Complete blood count tests must be basically normal within one week before enrollment; 11. Liver and kidney function tests must be basically normal within one week before enrollment; 12. Expected survival of at least 12 weeks; 13. Must be able to participate in and comply with treatment and follow-up; 14. Sign an informed consent form.

Exclusion criteria

Exclusion criteria: 1.HER2-positive status (IHC 3+ or FISH-positive); 2.History of another malignancy within 5 years prior to screening (including primary brain tumors or leptomeningeal disease), with the exception of cured basal cell skin cancer or cervical carcinoma in situ; 3.Receipt of any prior anticancer therapy within 2 weeks before the start of study treatment, including chemotherapy, definitive radiotherapy, biologic therapy, immunotherapy, or antitumor traditional Chinese medicine; 4.Major surgical procedure (excluding core needle biopsies) or clinically significant trauma within 4 weeks prior to the first dose of study drug, or anticipated need for elective surgery during the study; 5.Presence of symptomatic central nervous system (CNS) metastases; 6.Pregnant or lactating women; 7. Known or suspected allergy to any investigational drug or excipient; 8. Any other non-malignant systemic disease (cardiovascular, renal, hepatic, etc.) that may hinder the implementation of the treatment protocol or follow-up; 9. Any other condition that the investigator considers inappropriate for participation in this trial;

Design outcomes

Primary

MeasureTime frame
Progression Free Survival, PFS;

Secondary

MeasureTime frame
Overall survival, OS;Objective response rate, ORR;Disease control rate, DCR;

Countries

China

Contacts

Public ContactZhang Yu

The affiliated people's hospital of Ningbo University

95589034@qq.com+86 574 87017563

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Aug 25, 2026