ZS-802 in Hemophilia A: NCT05523128 Clinical Landscape Report 2026
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This Clinical Landscape Report was built with PatSnap Life Sciences MCP workflows. Clinical Trials MCP supplies protocol and result records, Drug & Asset MCP adds asset context, and Company & Deal Intelligence MCP resolves sponsor background. Use the same structured MCP building blocks in your research workflow.
Data snapshot: 15 October 2026. This strategic research report is not medical, regulatory or investment advice. Trial status and dates can change.
Not Applicable
Clinical phase
Unknown status
Recruitment status
not reported
Planned enrollment
2025-10-01
Primary-completion proxy
Executive view
NCT05523128 evaluates ZS-802 in Hemophilia A. The disclosed sponsor is Hematology Hospital of Chinese Academy of Medical Sciences, the design is Interventional, and the geographic footprint is China. The first listed primary endpoint is Incidence of adverse events, assessed over Baseline up to Week 52.
The key landscape question is whether this protocol can generate a clinically interpretable signal relative to nearby programs. Phase alone is not a measure of evidence quality. Endpoint relevance, comparator choice, masking, enrollment feasibility, patient selection, country coverage and follow-up must be considered together.
PatSnap MCP Servers make this assessment reproducible by keeping protocol facts, result evidence, asset attributes and sponsor identity in separate structured calls.
How the MCP evidence stack was assembled
Clinical Trials MCP clinical_trial_fetch retrieved the design, outcomes, phase, status, enrollment, sponsor, countries and timing for NCT05523128 and selected peers. clinical_trial_result_fetch supplied detailed result records from the wider Hemophilia A landscape. Drug & Asset MCP drug_fetch was queried for ZS-802, while Company & Deal Intelligence MCP organization_fetch was queried for Hematology Hospital of Chinese Academy of Medical Sciences.
This separation reduces a common diligence error: treating a registry label, a company description or a result excerpt as if each represented the complete evidence package. Explore the source workflow at the PatSnap MCP marketplace.
Trial landscape table
| Trial | Asset / intervention | Phase / status | Sponsor | Geography | Primary endpoint | Readout proxy |
|---|---|---|---|---|---|---|
| NCT05523128 | ZS-802 | Not Applicable / Unknown status | Hematology Hospital of Chinese Academy of Medical Sciences | China | Incidence of adverse events Baseline up to Week 52 | 2025-10-01 |
| NCT05789524 | Mutated alpha-1 antitrypsi(ApcinteX) | Phase 2 / Terminated | ApcinteX Ltd. | United States, United Kingdom, Spain, India, Armenia, Canada, Turkey, Belgium, Taiwan Province, Poland, South Africa, Italy, France, Australia, Germany | Annualized Bleeding Rate (ABR) for Treated Bleeds up to Week 24 Up to Week 24 | 2024-11-14 |
| NCT05709288 | Dalnacogene ponparvovec | Phase 1 / Recruiting | Sponsor not reported | China | The incidence of treatment related adverse events deemed related to BBM-H901 within 10 weeks after vector administration infusion to 10 weeks after vector infusion. | 2035-06-01 |
| NCT05707351 | Rurioctocog alfa pegol | Phase 3 / Completed | Takeda Pharmaceutical Co., Ltd. | China | Total Annualized Bleeding Rates (ABR) Baseline through study completion or ≥50 EDs whichever occurred last… | 2024-09-05 |
| NCT05695391 | Coagulation factor VIIa (recombinant)-jncw(LFB Biotechnologies SASU) | Phase 3 / Terminated | Laboratoire Français du Fractionnement et des Biotechnologies | United States, Turkey, South Africa, Mexico, Malaysia, Thailand | Eptacog Beta (Activated) (EB) Effectiveness Based on Protocol's Aggregate Score From surgical wound closure until 120 hours after surgical wound clos… | 2025-05-28 |
The table aligns endpoints, sponsors, phases, geographies and readout proxies. It is descriptive, not a head-to-head efficacy comparison. Differences in population, baseline risk, intervention schedule and follow-up can dominate apparent cross-trial differences.
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Protocol design and endpoint interpretation
NCT05523128 is a Not Applicable, unknown status study with not reported planned participants. Allocation is N/A, masking is None (Open Label), and the intervention model is Single Group Assignment.
The primary endpoint is “Incidence of adverse events” over “Baseline up to Week 52.” The retrieved endpoint description is: An adverse event (AE) is any medical occurrence, the event will not relate to the treatment..
Interpretation should test whether the endpoint captures a clinically meaningful change, whether its time horizon matches the proposed biology, and whether treatment discontinuation or missing data can bias the estimate. The planned enrollment of not reported should be assessed against expected effect size, event frequency, multiplicity, subgroup plans and attrition.
No named control drug was returned in the protocol field set. A placebo comparator can strengthen internal efficacy assessment, while an active comparator may better test clinical differentiation. Single-arm and open-label programs require greater weight on objective outcomes, independent assessment and external benchmarks.
Indexed readouts in the surrounding landscape
0 recent result records were selected as contextual evidence for Hemophilia A. These records do not establish direct evidence for NCT05523128 unless the registration number matches.
Indexed evidence status
No directly comparable result record was retrieved for this disease query. This is a monitoring gap, not evidence of absence.
Result fields should be reconciled with the source record before quantitative comparison. Population definitions, analysis sets, dose cohorts, estimands, confidence intervals, rescue therapy and follow-up can materially change the meaning of a numerical endpoint. Clinical Trials MCP supports repeatable refreshes as result records change.
Asset and sponsor context
ZS-802 is indexed as AAV based gene therapy with F8 biology and a global stage of Phase 1/2. The asset profile lists Sichuan Zhishan Weixin Biotechnology Co., Ltd. as an originator or developer.
Hematology Hospital of Chinese Academy of Medical Sciences is indexed in an unreported country with the website https://www.chinablood.com.cn. Functions as a College/University The record lists 32 development-stage drug assets.
For execution diligence, monitor sponsor ownership, collaborator additions, site expansion, protocol amendments and enrollment revisions. A change in ownership or geography can alter operational confidence as well as the commercial meaning of a future readout.
Development white space
- Endpoint white space. Determine whether a more patient-relevant outcome, longer durability window or blinded central assessment would resolve uncertainty left by the current endpoint.
- Population white space. Test biomarker-defined, treatment-line or risk-stratified subgroups where effect size and unmet need could be clearer.
- Comparator white space. Identify whether the study can support differentiation against the current standard of care rather than only activity against baseline or placebo.
- Geographic white space. Assess whether the disclosed footprint supports recruitment, regulatory transferability and commercial generalizability.
- Sequencing white space. Clarify whether ZS-802 is intended for monotherapy, combination, maintenance, rescue or an earlier treatment line.
White space should be framed as an unanswered development question, not merely an unoccupied mechanism label. A credible program closes a measurable clinical uncertainty with a design that can be executed and interpreted.
Strategic implications and next readouts
For sponsors, the endpoint hierarchy, safety window, enrollment pace and protocol amendment history should all support the same target product profile. Advancement criteria should be set before the readout and tied to clinical effect, uncertainty, tolerability and operational feasibility.
For business-development teams, differentiation may come from a sharper population, stronger comparator, more durable benefit, simpler delivery or clearer sequencing role. For investors, the central risk is evidence quality relative to time and capital, not the phase label in isolation.
Track recruitment status, enrollment changes, primary-completion timing, endpoint revisions, new result records, sponsor ownership and collaborator changes. Re-run the PatSnap MCP workflow when a surrogate becomes a clinical outcome, a single-country study expands, the comparator changes or a new result materially shifts the competitive benchmark.
Source trail and bottom line
Anchor trial: NCT05523128
Protocol source: https://clinicaltrials.gov/study/NCT05523128
MCP sources: Clinical Trials MCP (clinical_trial_fetch and clinical_trial_result_fetch); Drug & Asset MCP (drug_fetch); Company & Deal Intelligence MCP (organization_fetch).
Data snapshot: 15 October 2026.
ZS-802 in Hemophilia A is best understood through the interaction of protocol design, surrounding readouts, asset context and sponsor execution. The current record makes Incidence of adverse events and 2025-10-01 the leading decision points.
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