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Peripheral T Cells Lymphoma (PTCL)Phase 1/2PALT1NCT06495723

Polyspecific Antibodies in Lymphoproliferative T-cell Disorders

A Phase 1/2 study testing LIS1 in people with Peripheral T Cells Lymphoma (PTCL), run by Xenothera SAS at 8 sites in 2 countries.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

This is a 2-part study consisting of a Part 1, dose escalation and dose-finding component to establish the Maximal Tolerated Dose (MTD), or Recommended Part 2 Dose (RP2D) of LIS1 as a single agent; followed by a Part 2, to investigate anti-tumors efficacy of LIS1 in selected subtypes of Peripheral TCell Lymphoma… Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Peripheral T Cells Lymphoma (PTCL)
What is being tested?
LIS1
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
54 participants
Where
8 sitesin 2 countries
Study dates
9 Jul 2024to 31 Dec 2027
Phase
Phase 1/2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Provide signed, written informed consent.
  • Is male or female, age ≥18 years old (at the time consent is obtained)
  • For Part 1: Has a histological diagnosis of the following relapsed or refractory PTCL based on WHO 2022 classification of lymphoid neoplasms
  • Intestinal T-cell and NK cell lymphoid proliferations and lymphomas (without NK cell neoplasms)
  • Hepatosplenic T-cell lymphoma
  • Anaplastic large cell lymphoma
Show all 26Show fewer
  • Nodal TFH cell lymphoma
  • Other peripheral t-cell lymphomas For Part 2: The type of PTCL will be defined based on SC review after completion of Part 1 and will be documented in the protocol amendment
  • Had previously received 1 or more appropriate systemic therapies, including an alkylating agent and/or anthracycline, for treatment of the current disease (radiation therapy alone would not be acceptable as previous therapy). Participants with ALCL must have received prior brentuximab vedotin or be unable to receive it due to allergy or intolerance.
  • Experienced disease progression during or after completion of most recent therapy or refractory disease.
  • Has a measurable lesion by imaging: the longest diameter should be ≥1.5 cm for nodal lesions and >1 cm for extra-nodal lesions.
  • Experienced a toxicity of prior therapy: Participants must have recovered to less than Grade 1 or to baseline from toxicity of prior chemotherapy or biologic therapy and must not have had major surgery, chemotherapy, radiation, or biologic therapy within 2 weeks prior to beginning treatment.
  • Note: Exceptions to this include events not considered to place the participant at unacceptable risk of participation in the opinion of the Investigator (e.g., alopecia).
  • Has either unstained tissues (block or unstained slides) or stained slides and pathology report available for central review. If stained slides or unstained tissue are not available or insufficient, a fresh tumor tissue sample is mandatory for central pathology. Central pathology confirmation is not required prior to enrollment.
  • Is able to provide a bone marrow aspirate and/or a biopsy no older than 3 months at screening and agrees to undergo post-treatment bone marrow aspirate or biopsy when required to confirm response.
  • Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
  • Has life expectancy of >3 months.
  • Has an adequate hematological and organ function at screening, including:
  • Hemoglobin ≥8.0 g/dL (prior transfusion is acceptable)
  • Absolute neutrophil count (ANC) ≥1000 cells/mm3 (without growth factor support within 7 days of ANC measurement)
  • Platelet count ≥50,000 cells/mm3 (without growth factor support or transfusion within 7 days of platelets measurement)
  • Creatinine clearance ≥30 mL/min
  • Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) <3 × the upper limit of normal (ULN)
  • Serum total bilirubin <2 × ULN OR <3 × ULN (for participants with Gilbert's Syndrome)
  • Participants must be able to understand and sign an informed consent form.
  • All participants must use adequate contraception during participation in this study and for 6 months following completing therapy.

Who cannot join

  • Is diagnosed with a bulky disease (≥10 cm).
  • Has known history or presence of central nervous system involvement by leukemia or lymphoma.
  • Has Mature T-cell and NK-cell leukemias (WHO 2022 criteria)
  • Has T-lymphoblastic leukemia/lymphoma (WHO 2022 criteria)
  • Has tumor-like lesions with T-cell predominance (WHO 2022 criteria)
  • Has Primary cutaneous T-cell lymphomas (WHO 2022 criteria)
Show all 45Show fewer
  • Has any other active cancers, or history of treatment for invasive cancer ≤3 years.
  • Note: Participants with stage I cancer who have received definitive local treatment at least 3 years previously and are considered unlikely to recur are eligible. All participants with previously treated in situ carcinoma (i.e., non-invasive) are eligible.
  • Received any of the following treatments prior to the first dose of study medication:
  • Systemic chemotherapy, targeted small molecule therapy, or radiation therapy within 4 weeks (or 5 half-lives, whichever is shorter) before Cycle 1 Day 1. Participants that received local radiation therapy are eligible.
  • Therapeutic anti-cancer antibodies <4 weeks
  • Any investigational drug in the last 4 weeks prior
  • Any major surgery or immunotherapy within 28 days
  • Toxin immunoconjugates <4 weeks
  • Nitrosoureas <6 weeks
  • Allogeneic hematologic stem cell transplant within 3 months
  • Adaptive cellular therapy such as autologous or donor natural killer cell or T lymphocyte infusions within 90 days
  • Systemic corticosteroids (prednisone or equivalent >10 mg daily) within 2 weeks prior to the start of therapy, or 12 weeks if given to treat graft versus host disease (GVHD), except for physiological replacement doses of cortisone acetate or equivalent
  • Systemic treatment for GVHD (including but not limited to oral or parenteral corticosteroids, ibrutinib, and extracorporeal phototherapy) within the last 12 weeks
  • Is experiencing a toxicity (or AE) from prior anti-cancer treatment that has not resolved to Grade ≤1 or baseline.
  • Has a known infection with human immunodeficiency virus (HIV) or serologic status reflecting active hepatitis B or C infection as follows:
  • Presence of hepatitis B surface antigen (HBsAg) or hepatitis B core antibody (HBcAb). Participants with presence of HBcAb, but absence of HBsAg, are eligible only if hepatitis B virus (HBV) DNA is undetectable by an assay with sensitivity <20 IU/mL. If so, participants may either undergo regularly scheduled monitoring of HBV DNA or less frequent monitoring of HBV DNA while on prophylactic antiviral medication as defined by regional standard of care.
  • Presence of hepatitis C virus (HCV) antibody. Participants with presence of HCV antibody are eligible only if HCV RNA is undetectable.
  • Has a known active tuberculosis infection.
  • Has an active fungal, bacterial, and/or viral infection requiring systemic therapy.
  • Had a vaccination with a live vaccine within 35 days prior to the first dose of LIS1.
  • If woman, is pregnant or nursing a child.
  • Has an active autoimmune disease or history of autoimmune disease that may relapse except for type I diabetes under control, hypothyroidism managed with hormone replacement therapy, controlled celiac disease, and skin disease (vitiligo, psoriasis, etc.) not requiring systemic treatment.
  • Has a known history of interstitial lung disease, non-infectious pneumonitis, pulmonary fibrosis, acute lung disease, or dyspnea at rest or pulse oxymetrie < 92% at room air.
  • Has a clinically significant cardiovascular disease including the following:
  • Myocardial infarction or unstable angina within 3 months before screening
  • Congestive heart failure (New York Heart Association functional classification III-IV)
  • History of clinically significant arrythmias
  • QTcF > 470 msec
  • History of Mobitz II second degree or third-degree heart block without a permanent pacemaker in place
  • Uncontrolled hypertension as indicated by a minimum of 2 consecutive blood pressure measurements showing systolic blood pressure >170 mm Hg and diastolic blood pressure >105 mmHg at screening
  • Has a cognitive impairment, active substance abuse, or psychiatric illness or social situations that, in the view of the Investigator, would preclude safe treatment or the ability to give informed consent and limit compliance with study requirements.
  • Has a known history of drug-induced liver injury, alcoholic liver disease, non- alcoholic steatohepatitis, primary biliary cirrhosis, ongoing extrahepatic obstruction caused by stones, cirrhosis of the liver or portal hypertension.
  • Has a hemophilia or von Willebrand's disease.
  • Has any psychological, familial, sociological, or geographical conditions that do not permit compliance with the protocol.
  • Has a concurrent condition that, in the Investigator's opinion, would jeopardize compliance with the protocol.
  • Are unable or unwilling to comply with study and/or follow-up procedures outlined in the protocol.
  • For France, participants under legal protection (safeguard, guardianship, curatorship).
  • Is currently participating in another therapeutic clinical study.
  • Has a known hypersensitivity to polyclonal antibody.

Trial locations and contacts

8 sites in 2 countries. Contact the study team or a site near you to ask about taking part.

8 sites in 2 countries

France5 sites, 5 recruiting
  • CHU de Caen

    Caen, 14033

    Gandhi-Laurent DAMAJ, damaj-gl@chu-caen.fr

    Recruiting
  • CHU de Clermont-Ferrand

    Clermont-Ferrand, 63003

    Olivier TOURNILHAC, MD, otournilhac@chu-clermontferrand.fr

    Recruiting
  • CHU Henri-Mondor

    Créteil, 94000

    Françoise LEMONNIER, MD, francois.lemonnier@aphp.fr

    Recruiting
  • CHU de Bordeaux - GH Sud - Hôpital Haut-Lévêque

    Pessac, 33604

    Kamal BOUABDALLAH, krimo.bouabdallah@chu-bordeaux.fr

    Recruiting
  • CHU de Lyon - Hôpital Lyon Sud

    Pierre-Bénite, 69310

    Emmanuel BACHY, emmanuel.bachy@chu-lyon.fr

    Recruiting

Other trials in France

Italy3 sites, 3 recruiting
  • IRCCS Azienda Ospedaliero-Universitaria di Bologna - Policlinico di Sant'Orsola

    Bologna, Emilia-Romagna, 40138

    Pier Luigi ZINZANI, MD

    Cinzia PELLEGRINI, MD

    Recruiting
  • Fondazione IRCCS Istituto Nazionale dei Tumori

    Milan, Lombardy, 20133

    Paolo Corradini, MD, +39 02 2390 2732, paolo.corradini@istitutotumori.mi.it

    Recruiting
  • SC Ematologia Istituto Nazionale dei TumoriIRCCS Fondazione "G. Pascale"

    Naples, Campania, 80131

    Antonio PINTO, MD

    Recruiting

Other trials in Italy

About this study

Official title: Phase I/II, Open-label, Multi-center Study to Evaluate the Safety and Efficacy of Glyco-humanized Polyclonal Antibody Directed Against Tumoral T Cells, in Patients With Relapsed/Refractory Peripheral T Cells Lymphoma (PTCL)

This is a 2-part study consisting of a Part 1, dose escalation and dose-finding component to establish the Maximal Tolerated Dose (MTD), or Recommended Part 2 Dose (RP2D) of LIS1 as a single agent; followed by a Part 2, to investigate anti-tumors efficacy of LIS1 in selected subtypes of Peripheral TCell Lymphoma (PTCL) and to further evaluate its safety and tolerability at RP2D.

Being tested
LIS1
Keywords
Relapsed Refractory PTCL

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • LIS1Drug

    The study intervention (LIS1) is a glyco-humanized polyclonal antibody drug which is formulated for IV administration.

Study groups in NCT06495723
Study groupRoleWhat they receive
Dose Escalation part: dose 2 mg/kgExperimentalDose Escalation part: Dose level of LIS1: 2 mg/kg.
Receives: Drug: LIS1
Dose Escalation part: dose 4 mg/kgExperimentalDose Escalation part: Dose level of LIS1: 4 mg/kg.
Receives: Drug: LIS1
Dose Escalation part: dose 6 mg/kgExperimentalDose Escalation part: Dose level of LIS1: 6 mg/kg.
Receives: Drug: LIS1
Expansion partExperimentalExpansion part: Participants will receive LIS1 at the RP2D determined in Part 1 of the study.
Receives: Drug: LIS1

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Dose Escalation part: Dose Limiting Toxicities (DLTs)

    Incidence of DLTs in the first cycle

    Measured: At the end of Cycle 1 (28 days)

  2. Dose Escalation part: treatment emergent adverse events (TEAEs)

    The severity of averse events (AEs) will be graded according to the NCI CTCAE, v5.0.

    Treatment-emergent adverse events are defined as any AE with onset or worsening of a pre existing condition after the first dose of study intervention through 60 days following the last dose of study intervention.

    Measured: After the first dose of study intervention through 60 days following the last dose of study intervention.

  3. Expansion part: Anti-tumors efficacy

    Objective response rate (ORR): defined as the proportion of participants with CR or PR assessed by Investigators according to Lugano criteria with the LYRIC modification for immunomodulatory drug.

    Measured: Within 3 months after LIS1 initiation

Secondary outcomes (19)
  1. Pharmacokinetics (PK) of LIS: Cmax

    LIS1 peak plasma concentration (Cmax) in plasma

    Measured: At Cycle1Day 1 Predose and 5 minutes; 1; 2; 4; 8; 24 hours after the end of infusion. At Day1 and Day15 of Cycle2 to 6 (each cycle is 28 days): Predose and 5 minutes after the end of infusion. At Day 30 and Day60 after the last dose of LIS1.

  2. Pharmacokinetics (PK) of LIS: Tmax

    Time to peak drug concentration in plasma (Tmax)

    Measured: At Cycle1Day 1 Predose and 5 minutes; 1; 2; 4; 8; 24 hours after the end of infusion. At Day1 and Day15 of Cycle2 to 6 (each cycle is 28 days): Predose and 5 minutes after the end of infusion. At Day 30 and Day60 after the last dose of LIS1.

  3. Pharmacokinetics (PK) of LIS: AUC

    AUC24hours; AUC0-14days; AUC15-28days and AUC0-28days will be assessed

    Measured: At Cycle1Day 1 Predose and 5 minutes; 1; 2; 4; 8; 24 hours after the end of infusion. At Day1 and Day15 of Cycle2 to 6 (each cycle is 28 days): Predose and 5 minutes after the end of infusion. At Day 30 and Day60 after the last dose of LIS1.

  4. Pharmacokinetics (PK) of LIS: Ctrough

    Trough concentration (Ctrough) is the concentration reached by LIS1 immediately before the next dose is administered

    Measured: At Cycle1Day 1 Predose and 5 minutes; 1; 2; 4; 8; 24 hours after the end of infusion. At Day1 and Day15 of Cycle2 to 6 (each cycle is 28 days): Predose and 5 minutes after the end of infusion. At Day 30 and Day60 after the last dose of LIS1.

  5. Pharmacokinetics (PK) of LIS: Cmin

    Cmin for the minimum blood plasma concentration reached by LIS1 during the time interval between administration of two doses

    Measured: At Cycle1Day 1 Predose and 5 minutes; 1; 2; 4; 8; 24 hours after the end of infusion. At Day1 and Day15 of Cycle2 to 6 (each cycle is 28 days): Predose and 5 minutes after the end of infusion. At Day 30 and Day60 after the last dose of LIS1.

  6. Pharmacokinetics (PK) of LIS: T1/2

    Half-life (T1/2) refers to the time required for plasma concentration of LIS1 to decrease

    Measured: At Cycle1Day 1 Predose and 5 minutes; 1; 2; 4; 8; 24 hours after the end of infusion. At Day1 and Day15 of Cycle2 to 6 (each cycle is 28 days): Predose and 5 minutes after the end of infusion. At Day 30 and Day60 after the last dose of LIS1.

  7. Pharmacokinetics (PK) of LIS: CL

    Clearance (CL) is the volume of blood or plasma cleared of LIS1 from the body per unit of time

    Measured: At Cycle1Day 1 Predose and 5 minutes; 1; 2; 4; 8; 24 hours after the end of infusion. At Day1 and Day15 of Cycle2 to 6 (each cycle is 28 days): Predose and 5 minutes after the end of infusion. At Day 30 and Day60 after the last dose of LIS1.

  8. Pharmacokinetics (PK) of LIS: Vd

    Volume of distribution (Vd) is defined as the total amount of LIS1 in the body divided by its concentration in plasma

    Measured: At Cycle1Day 1 Predose and 5 minutes; 1; 2; 4; 8; 24 hours after the end of infusion. At Day1 and Day15 of Cycle2 to 6 (each cycle is 28 days): Predose and 5 minutes after the end of infusion. At Day 30 and Day60 after the last dose of LIS1.

  9. Host immunogenicity to LIS1

    Number of participants who develop detectable anti-drug antibodies

    Measured: Before and after (up to 5 min after the infusion) LIS1 infusion at Cycle1Day 1, Cycle1Day8, Cycle1Day15, and Cycle1Day22, then before infusion at Day1 and Day15 of Cycle2 to Cycle6 (each cycle is 28 days), and at Day30 and Day60 after last dose of LIS1

  10. Expansion part: treatment emergent adverse events (TEAEs)

    The severity of averse events (AEs) will be graded according to the NCI CTCAE, v5.0.

    Treatment-emergent adverse events are defined as any AE with onset or worsening of a pre existing condition after the first dose of study intervention through 60 days following the last dose of study intervention.

    Measured: After the first dose of study intervention through 60 days following the last dose of study intervention.

  11. Expansion part: Proportion of Complete Response (CR) as best overall response

    Proportion of Complete Response as best overall response

    Measured: Within 3 months and 6 months after LIS1 initiation

  12. Expansion part: Proportion of Partial Response (PR) as best overall response

    Proportion of PR as best overall response

    Measured: Within 3 months and 6 months after LIS1 initiation

  13. Expansion part: Proportion of Stable Disease (SD) as best overall response

    Proportion of SD as best overall response

    Measured: Within 3 months and 6 months after LIS1 initiation

  14. Expansion part: Proportion of Progressive Disease (PD) as best overall response

    Proportion of PD as best overall response

    Measured: Within 3 months and 6 months after LIS1 initiation

  15. Expansion part: Duration of response (DoR)

    DoR: defined as the time interval between the first confirmed objective response (CR or PR) and the first occurrence of objective progression (PD) or death from any cause.

    Measured: Within 3 months and 6 months after LIS1 initiation

  16. Expansion part: Time to response (TTR)

    TTR: defined as the time from the date of LIS1 initiation to first confirmed objective response (CR or PR)

    Measured: Within 3 months and 6 months after LIS1 initiation

  17. Expansion part: Progression-free survival (PFS)

    PFS: defined as the time from the date of LIS1 initiation to the date of first documented progression or death

    Measured: Within 3 months and 6 months after LIS1 initiation

  18. Expansion part: Overall survival (OS)

    OS: defined as the time interval between the date of LIS1 initiation and the date of death due to any cause

    Measured: Within 3 months and 6 months after LIS1 initiation

  19. Expansion part: Proportion of patients "bridged to transplantation"

    Proportion of patients with a stem cell transplantation after LIS1 treatment

    Measured: Through study completion, an average of 1 year.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Jul 2024
  2. Study start9 Jul 2024
  3. Primary completion31 Dec 2026 (estimated)
  4. Study completion31 Dec 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1/2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Sequential
Masking
None (open label)
Enrolment
54 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06495723
Sponsor's protocol ID
XT 23-10
Other IDs
2023-509648-88-00, 2023
Acronym
PALT1
Status last verified
Aug 2026
First submitted
18 Jun 2024
Last updated
20 Aug 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing LIS1 in people with Peripheral T Cells Lymphoma (PTCL), run by Xenothera SAS at 8 sites in 2 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 26 inclusion and 45 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 20 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 8 sites in France, Italy. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Françoise SHNEIKER, MD (+33652720301, francoise.shneiker@xenothera.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Dose Escalation part: Dose Limiting Toxicities (DLTs) (time frame: At the end of Cycle 1 (28 days)). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Aug 2026.

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