Study to Evaluate CCS1477 (inobrodib) in Haematological Malignancies INOBRODIB

What's the purpose of this trial?

A Phase 1/2a study to assess the safety, tolerability, PK and biological activity of CCS1477 in patients with Non-Hodgkin Lymphoma, Multiple Myeloma, Acute Myeloid Leukaemia or High Risk Myelodysplastic syndrome.

This trial is currently open and accepting patients.


What will happen during the trial?

You may be able to join this trial if you:

The following criteria is a partial list of reasons why patients may be eligible to participate in this clinical trial. Further evaluation with a medical professional is required.

Inclusion Criteria:

* Provision of consent
* ECOG performance status 0-2
* Patients with confirmed (per standard disease specific diagnostic criteria), relapsed or refractory haematological malignancies (NHL, MM and AML)
* Must have previously received standard therapy
* Adequate organ function

Exclusion Criteria:

* Intervention with any chemotherapy, investigational agents or other anti-cancer drugs within 14 days or 5 half-lives of the first dose
* Major surgical procedure or significant traumatic injury within 4 weeks of the first dose of study treatment
* Strong inhibitors of CYP3A4 or CYP3A4 substrates with a narrow therapeutic range taken within 2 weeks of the first dose of study treatment
* Strong inducers of CYP3A4 within 4 weeks of the first dose of study treatment
* Patients should discontinue statins prior to starting study treatment
* CYP2C8 substrates with a narrow therapeutic range taken within 2 weeks of the first dose of study treatment
* Any unresolved reversible toxicities from prior therapy \>CTCAE grade 1 at the time of starting study treatment (except alopecia and grade 2 neuropathy)
* Any evidence of severe or uncontrolled systemic diseases
* Any known uncontrolled inter-current illness
* QTcF prolongation (\> 480 msec)

Additional Trial Information

Phase 1/2

Enrollment: 250 patients (estimated)

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Published Results

Tolerability and Clinical Activity of Novel First-in-Class Oral Agent, Inobrodib (CCS1477), in Combination with Pomalidomide and Dexamethasone in Relapsed/Refractory Multiple Myeloma

November 05, 2024

Dose escalation cohorts have enrolled 48 RRMM pts to date with a median age of 68 yrs (range 41-82). Median prior lines of therapy was 6 (range 2-10), all were triple-class exposed, 39 pts (81%) were triple class refractory, and 16 pts (33%) received prior BCMA therapy. In addition, 31 pts (65%) were pomalidomide-refractory.

Median duration of treatment for 36 evaluable patients to date was 177 days (range 35-601), with a median of 6 cycles (range 1-21). Over 1/3rd of the patients continue on treatment. Almost 1/3rd of patients have died in the survival follow-up, mainly due to disease progression, but a number of patients remain in follow-up for overall survival.

At the data cut-off (4th June 2024), Grade (gr) 3/4 treatment-emergent adverse events (TEAEs) were reported in 35 of 48 (73%) pts. The most frequent gr 3/4 events were hematological (56%); neutropenia (27%: 19% gr 3, 8% gr 4), thrombocytopenia (27%: 21% gr 3, 6% gr 4) and anemia (13%, all gr 3). Frequency of gr 3/4 infections was 29%. This is in line with the anticipated profile of pom/dex only. The main potential for overlapping toxicity is thrombocytopenia however no significant increase in frequency or severity has been seen with the triplet. Inobrodib as monotherapy has not been shown to cause neutropenia. One patient died due to an unrelated cardiac event at the end of cycle 2. Five pts (10%) discontinued due to TEAEs. The pattern of TEAEs considered related to study treatments is consistent with the known safety profile of the individual agents, with the majority of events gr 1/2 and the most common gr 3/4 events being hematological toxicities.

Objective responses were seen across all dose levels tested with best ORR (6/8 evaluable patients, 75%) in the highest dose cohort. In general responses start rapidly after initiation of treatment and deepen with time on treatment.

Among pom-refractory pts, 7 had progressed on a pom-containing regimen as the last prior therapy and 5 of these achieved OR, providing clinical proof of concept on published non-clinical data regarding the exquisite synergy of this combination (Welsh et al. 2024). Responses were also seen in patients exposed to anti-BCMA and/or TCE therapies; further recruitment is ongoing in this population.

In the initial sample of pom-naïve pts (12), there is a trend for deeper response with 2 patients achieving CRs (17%) and 2 patients having MRD negativity 10-5 .

Trial Locations

All Trial Locations

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Indiana

Community Health Network - South

Indianapolis, IN

Open and Accepting

Maryland

Nebraska

Pennsylvania

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