NCT07671885 Adjuvant systemic therapy based on pathological findings HR-positive/HER2-low Breast Carcinoma Clinical Landscape Report 2026: Design, Endpoints, Sponsor and Readout Outlook
Turn a newly registered trial into a decision-ready landscape. This focused report examines NCT07671885—Evaluating the Response-Guided Therapy With Neoadjuvant Endocrine Therapy to Optimize Adjuvant Treatment in Premenopausal HR+/HER2- Breast Cancer (JCOG2402, Young HOPE) (YoungHOPE)—using PatSnap Clinical Trials MCP for protocol design and endpoint evidence, Drug & Asset MCP for mechanism and development context, and Company & Deal Intelligence MCP for sponsor background. Explore PatSnap MCP Servers to reproduce the workflow inside an AI research process.
MCP evidence snapshot: 20 July 2026; publication date: 20 July 2026. Trial records can change after the snapshot and should be rechecked before operational decisions.
Why NCT07671885 is a hot trial to watch
HR-positive/HER2-low Breast Carcinoma is increasingly segmented by mechanism, biomarker, treatment setting, geography and endpoint architecture. NCT07671885 is notable because it evaluates Adjuvant systemic therapy based on pathological findings in a Phase 3 design while Time from randomization to the first diagnosis of local invasive recurrence, regional recurrence, distant recurrence, contralateral invasive breast cancer, inoperable progressive disease during neoadjuvant endocrine therapy, second primary invasive non-breast cancer (excluding non-melanoma skin cancer and in situ cervical cancer), or death from any cause serves as the main decision variable. The critical question is whether the protocol can convert its rationale into a clinically interpretable and operationally credible readout.
PatSnap Clinical Trials MCP makes protocol fields machine-readable, while the companion asset and organization servers add development-status, target and sponsor context.
Trial landscape snapshot
| Field | Indexed detail |
|---|---|
| Registration | NCT07671885 |
| Official title | Evaluating the Response-Guided Therapy With Neoadjuvant Endocrine Therapy to Optimize Adjuvant Treatment in Premenopausal HR+/HER2- Breast Cancer (JCOG2402, Young HOPE) (YoungHOPE) |
| Phase / status | Phase 3 / Recruiting |
| Intervention | Adjuvant systemic therapy based on pathological findings, Adjuvant systemic therapy based on pathological findings and ET response |
| Sponsor | Tokyo Women's Medical University Educational Association |
| Collaborators | Not reported |
| Geography | Japan |
| Enrollment | 950 |
| Primary endpoint | Time from randomization to the first diagnosis of local invasive recurrence, regional recurrence, distant recurrence, contralateral invasive breast cancer, inoperable progressive disease during neoadjuvant endocrine therapy, second primary invasive non-breast cancer (excluding non-melanoma skin cancer and in situ cervical cancer), or death from any cause |
| Endpoint time frame | Up to 12 years (5 years of accrual and 7 years of follow-up) |
| Primary completion / readout proxy | [object Object] |
Design and endpoint interpretation
The phase label is only the starting point. Allocation is Randomized, masking is None (Open Label), and the intervention model is Parallel Assignment. Planned enrollment of 950 participants across Japan shapes statistical precision, execution risk and external validity. Interpretation should account for baseline risk, prior therapy, assessment schedule, missing-data handling and clinical relevance—not only statistical significance.
- Primary: Time from randomization to the first diagnosis of local invasive recurrence, regional recurrence, distant recurrence, contralateral invasive breast cancer, inoperable progressive disease during neoadjuvant endocrine therapy, second primary invasive non-breast cancer (excluding non-melanoma skin cancer and in situ cervical cancer), or death from any cause (Up to 12 years (5 years of accrual and 7 years of follow-up))
- Secondary: Time from randomization to death from any cause (Up to 12 years (5 years of accrual and 7 years of follow-up))
- Secondary: Time from randomization to the first diagnosis of relapse or death from any cause (Up to 12 years (5 years of accrual and 7 years of follow-up))
- Secondary: Time from randomization to the first diagnosis of distant recurrence of breast cancer or death from any cause (Up to 12 years (5 years of accrual and 7 years of follow-up))
Benchmark readouts in the surrounding field
- A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study of RDX-002 on Postprandial Triglycerides in Patients Discontinuing the Glucagon-like Peptide-1 (GLP-1) Agonists, Semaglutide, or Tirzepatide for the Treatment of Obesity (Phase 2): Incremental Postprandial Triglycerides (TG)(Mean) = 43.81 percent change (Standard Deviation, 92.373); Incremental Postprandial Triglycerides (TG)(Mean) = -51.91 percent change (Standard Deviation, 72.293)
- A Phase II Study to Evaluate the Delay in Ovulation Following Oral Levonorgestrel Plus Meloxicam Compared to Placebo in Obese But Normal Menstruating Women (Phase 2): Interval From First Dose to Evidence of Ovulation.(Mean) = 2.67 Number of days (Standard Deviation, 1.53); Interval From First Dose to Evidence of Ovulation.(Mean) = 4.0 Number of days (Standard Deviation, 0)
- A Phase 2, Parallel-Group, Double-Blind Study to Investigate Weight Management With LY3841136 Compared With Placebo in Adult Participants With Obesity or Overweight (Phase 2): Percent Change From Baseline in Body Weight at Week 48(Least Squares Mean) = -0.4 percent change (Standard Error, 0.91); Percent Change From Baseline in Body Weight at Week 48(Least Squares Mean) = -9.4 percent change (Standard Error, 1.60)
These indexed results are contextual benchmarks, not direct head-to-head evidence. Population, treatment line, endpoint definitions, follow-up and analysis sets may differ. Their value is to clarify the type and magnitude of evidence already visible in the competitive landscape.
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Asset and sponsor context
Drug & Asset context: Not reported
Company & Deal Intelligence context: Tokyo Women's Medical University Educational Association — Japan — https://twmu.ac.jp
The sponsor profile matters because scientific rationale alone does not determine development value. Manufacturing readiness, portfolio fit, geographic reach, partnering capacity and the ability to fund confirmatory development can decide whether a positive signal becomes a competitive asset.
White space around this program
- Sharper patient selection: prospective biomarker or phenotype definitions that identify who is most likely to benefit.
- Clinically interpretable endpoints: outcomes connecting activity with function, symptoms, survival or treatment burden.
- Sequencing evidence: comparative data after the most relevant contemporary standard of care.
- Broader external validity: evidence across additional geographies, demographic groups and real-world settings.
- Operational differentiation: a development path that closes the readout gap without sacrificing safety or durability.
What to monitor next
Monitor recruitment, enrollment changes, protocol amendments, endpoint hierarchy, primary-completion timing, first result indexing, asset ownership and sponsor partnerships. A change in endpoint, population or ownership can alter probability of success before a headline data release.
Bottom line
NCT07671885 is a focused lens on HR-positive/HER2-low Breast Carcinoma development. Its value will be determined by whether Adjuvant systemic therapy based on pathological findings can convert the current design into evidence that is clinically meaningful, operationally credible and differentiated from indexed benchmark readouts.
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