ClinicalTrials.gg
Active, not recruitingNCT05878184Updated Oct 2, 2025

Study Evaluating SC291 in Subjects With r/r B-cell Malignancies (ARDENT)

A Phase 1 interventional study of SC291 in Non Hodgkin Lymphoma and Chronic Lymphocytic Leukemia, sponsored by Sana Biotechnology. Active, not recruiting at 10 sites in 2 countries. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2025-10-02.

Sponsored by Sana Biotechnology · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Nov 2025, 1 year ago, but the record still lists the study as active, not recruiting.
Phase
Phase 1
Study type
Interventional
Enrollment
16
Allocation
Not applicable
Ages
18 Years to 80 Years
Sex
All
01

Study summary

SC291-101 is a Phase 1 study to evaluate SC291 safety and tolerability, anti-tumor activity, cellular kinetics, immunogenicity, and exploratory biomarkers.

Read the detailed description

This is an open-label, single arm, Phase 1, first-in-human (FIH) study to evaluate the safety and tolerability of SC291 administered intravenously (IV) following a standard lymphodepleting chemotherapy regimen of cyclophosphamide and fludarabine in subjects with NHL or CLL who have received two or more prior systemic treatments per standard of care (or after autologous stem cell transplant [ASCT] for NHL). This study will be conducted in 2 parts. Phase 1a: dose finding using a 3+3 design in subjects with NHL or CLL. Phase 1b: dose expansion to further evaluate safety and efficacy at the RP2D in subjects with LBCL and CLL.

02

Conditions studied

  • Non Hodgkin Lymphoma
  • Chronic Lymphocytic Leukemia

Keywords

  • Large B cell lymphoma
  • CAR T Cell Therapy
  • Mantle cell lymphoma
  • Indolent follicular lymphoma
  • Marginal zone lymphoma
  • High-grade B cell lymphoma
  • Primary mediastinal B cell lymphoma
  • Diffuse large B cell lymphoma
  • Non-Hodgkin's Lymphoma
  • Chronic Lymphocytic Leukemia
  • Allogeneic
  • Hypoimmune
  • CD19
03

In context

Lymphoma, Non-Hodgkin

2,287 studies on the registry are indexed under Lymphoma, Non-Hodgkin; 287 are open to participants now.

This study's enrollment of 16 is below the median of 40 across 1,883 interventional studies indexed under Lymphoma, Non-Hodgkin.

Browse Lymphoma, Non-Hodgkin studies →

Lead sponsor

Sana Biotechnology is the lead sponsor of 3 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male or female subjects aged 18-80 years at the time of signing .
  • Diagnosis of NHL (WHO 2016 criteria) or CLL (iwCLL criteria), including:
  • Large B-cell lymphoma, including diffuse large B-cell lymphoma (DLBCL) not otherwise - - specified (including DLBCL arising from indolent lymphoma), primary mediastinal large -- - B-cell lymphoma, high grade B-cell lymphoma, follicular lymphoma grade 3B
  • Follicular lymphoma (dose escalation only except for follicular lymphoma grade 3B)
  • Marginal zone lymphoma (dose escalation only)
  • Mantle cell lymphoma (dose escalation only)
  • CLL or SLL
  • disease after at least 2 prior systemic regimens per standard of care or after stem cell transplant
  • performance status of 0 or 1.
  • At least one per Lugano Classification (NHL); CLL subjects must meet iwCLL treatment criteria
  • ≥12 weeks

Exclusion criteria

Exclusion Criteria:

  • Prior anti-CD19 therapy including CD19-directed CAR T treatment or other CD19-directed antibody or cell therapy (e.g., NK cell). (Part 2 dose expansion only - prior approved CD19-directed CAR T therapy required)
  • History of primary central nervous system (CNS) lymphoma or presence of
  • Systemic anticancer therapy (including platinum-based chemotherapies and I/O therapies) or radiotherapy within 14 days of SC291 (28 days for biologics)
  • HSCT within 6 weeks of treatment with SC291 (or allogeneic HSCT at any time).
  • Active disease or any other diseases requiring therapy or therapy (defined as >20 mg/day prednisone or equivalent).
  • History or presence of cardiac or CNS disorders as defined in the protocol
Terms in these criteria, in plain language(10)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

Allogeneic and autologous transplant

Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Brain metastases

Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).

Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
16 participants (actual)

Study arms

  • Experimental
    SC291 Plus Chemotherapy Regimen

    A conditioning chemotherapy regimen of fludarabine and cyclophosphamide will be administered followed by investigational treatment with SC291

    Drug: SC291

Interventions

  • DrugSC291

    SC291 is an allogeneic CAR-T cell therapy

    Also known as: Cyclophosphamide, Fludarabine

06

What researchers measure

Primary outcomes

  1. Evaluate safety and tolerability of SC291

    Safety and Tolerability: Proportion of subjects experiencing adverse events and dose-limiting toxicities

    Time frame: 24 months

Secondary outcomes

  1. Evaluate preliminary anti-tumor activity of SC291

    Preliminary anti-tumor activity: Proportion of subjects with an objective response (including partial response or complete response)

    Time frame: 24 months

  2. Evaluate cellular kinetics and persistence of SC291

    Cellular kinetics-related parameters evaluated by CAR T cell copy number

    Time frame: 24 months

  3. Evaluate cellular kinetics and persistence of SC291

    Cellular kinetics related peak (Cmax) in peripheral blood

    Time frame: 24 months

  4. Evaluate cellular kinetics and persistence of SC291

    Area under the concentration time curve (AUC) in peripheral blood

    Time frame: 24 months

  5. Evaluate host immunogenicity to SC291

    Incidence of anti-CD19-directed CAR antibodies

    Time frame: 24 months

07

Study locations

10 sites
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 2, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05878184
Lead sponsor
Sana Biotechnology
Responsible party
Sponsor
First posted
May 26, 2023
Start date
May 2, 2023
Primary completion
Nov 4, 2025 (estimated)
Completion
Nov 4, 2038 (estimated)
Last update
Oct 2, 2025

Study contacts

John Gerecitano, MD, PhD
study director · Sana Biotechnology, Inc.

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Sep 2025. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion