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New drug RSC-1255 takes on Hard-to-Treat cancers

NCT ID NCT04678648

Disease control Sponsor: RasCal Therapeutics, Inc. Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This early-phase trial tests an experimental drug called RSC-1255, given alone or with hydroxychloroquine, in people with advanced solid tumors (like lung, colon, or pancreatic cancer) who have run out of standard options. The study has two parts: first, finding a safe dose, and then checking for early signs of effectiveness. About 134 participants will take part.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
RSC-1255 (an experimental drug taken orally) alone or with hydroxychloroquine
What this could lead to
If successful, this could point toward a new treatment option for people with advanced cancers that have not responded to standard therapies.
What could go wrong
This is a very early Phase 1 trial, so the main goal is safety, not effectiveness. The drug may not shrink tumors or may cause side effects. It is too soon to know if it will work.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 134 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2021

Expected to finish

Jan 2027

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria (Key Factors): 1. Has pathologically confirmed advanced or metastatic malignancy characterized by one or more of the following: * Participant is intolerant of existing therapy(ies) known to provide clinical benefit for their condition * Malignancy is refractory to existing therapy(ies) known to potentially provide clinical benefit * Malignancy has progressed on standard therapy 2. Has evaluable or measurable tumor(s) in dose-escalation by standard radiological and/or laboratory assessments as applicable to their malignancy. 3. Has adequate performance status (PS): Eastern Co-operative Oncology Group (ECOG). 4. Is age ≥ 18 years. 5. Has either tissue agnostic tumors and documented RAS mutations or with glioblastoma with or without mutation in RAS Exclusion Criteria (Key Factors): 1. Participants receiving cancer therapy at the time of enrollment. 2. Any clinically significant disease or condition affecting a major organ system. 3. Significant cardiovascular disease or electrocardiogram (ECG) abnormalities. 4. Known Gilbert's disease. 5. Has had a previous (within 2 years) or has a current malignancy other than the target cancer. 6. Intermittent hypokalemia 7. Grade 1 or higher nausea, vomiting, diarrhea at baseline due to underlying disease

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Conditions

The condition(s) this trial relates to.

cancer colon carcinoma colonic neoplasm Disease Progression glioblastoma lung cancer lung neoplasm malignant pancreatic neoplasm neoplasm pancreatic neoplasm

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Advanced malignant solid neoplasm Colon cancer Glioblastoma Lung cancer Pancreatic cancer Ras mutation

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

    3 sites. The list below names each one and where it is.

  3. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  4. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Study contacts

  • Contact

    Email: •••••@•••••

Locations

  • Sarah Cannon, SCRI Oncology Partners

    RECRUITING

    Nashville, Tennessee, 37203, United States

  • Sarah Cannon, SCRI Oncology Partners - Health One

    RECRUITING

    Denver, Colorado, 80218, United States

  • University of California, Los Angeles (UCLA) Department of Medicine - Hematology/Oncology

    RECRUITING

    Los Angeles, California, 90404, United States

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