A Study Of Metastatic Gastrointestinal Cancers Treated With Tumor Infiltrating Lymphocytes In Which The Gene Encoding The Intracellular Immune Checkpoint CISH Is Inhibited Using CRISPR Genetic Engineering

Study Overview

A Study of Metastatic Gastrointestinal Cancers Treated With Tumor Infiltrating Lymphocytes in Which the Gene Encoding the Intracellular Immune Checkpoint CISH Is Inhibited Using CRISPR Genetic Engineering

A clinical trial to assess the safety and efficacy of genetically-engineered, neoantigen-specific Tumor Infiltrating Lymphocytes (TIL) in which the intracellular immune checkpoint CISH has been inhibited using CRISPR gene editing for the treatment of Gastro-Intestinal (GI) Cancer.

Tumor Infiltrating Lymphocytes (TIL) have shown efficacy in certain cancers, principally in melanoma. Efficacy in more common solid tumors has been demonstrated via the selection of cancer neoantigen-specific TIL. Combination cell surface checkpoint inhibitor therapy has also been employed in an attempt to enhance the efficacy of these cell therapies. Genetic engineering of T cells to further increase anti-tumor activity is now possible. CISH (Cytokine-induced SH2 protein) is a novel intra-cellular immune checkpoint and an important negative regulator of T-cell signaling and function. The inhibition of CISH in mouse anti-tumor lymphocytes results in a marked increase in the ability of these lymphocytes to mediate tumor regression following administration to tumor bearing mice. Additionally, data in genetically-engineered, neoantigen-specific human T cells in which CISH was inhibited, showed enhanced TCR functional avidity and increased ability of these T cells to detect cancer specific mutations and mount robust polyfunctional cytokine immune responses against their cognate cancer antigens. Thus, these T cells appear to have a significant advantage in inducing anti-tumor responses compared to wild-type anti-tumor lymphocytes. The researchers have developed and optimized a CRISPR/Cas9 based strategy for precise and efficient genetic engineering in primary human T-cells without sacrificing cell viability or function, allowing for inhibition of a heretofore undruggable intracellular checkpoint. Thus, in this protocol, the researchers propose to inhibit the gene encoding the intracellular checkpoint target CISH in lymphocytes from patients with metastatic cancers that are selected for anti-tumor activity in order to evaluate the safety and efficacy of genetically engineered T cell therapy for solid tumors in the setting of novel checkpoint inhibition.

Gastrointestinal Epithelial Cancer
Gastrointestinal Neoplasms
Cancer of Gastrointestinal Tract
Cancer, Gastrointestinal
Gastrointestinal Cancer
Colo-rectal Cancer
Pancreatic Cancer
Gall Bladder Cancer
Colon Cancer
Esophageal Cancer
Stomach Cancer

DRUG: Cyclophosphamide
DRUG: Fludarabine
BIOLOGICAL: Tumor-Infiltrating Lymphocytes (TIL)
DRUG: Aldesleukin

2019LS002

Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates	Results Reporting Dates	Study Record Updates
First Submitted 2020-06-08	Results First Submitted N/A	Last Update Submitted that met QC Criteria 2025-01-16
First Submitted that Met QC Criteria 2020-06-09	Results First Submitted that Met QC Criteria N/A	Last Update Posted (ACTUAL) 2025-01-17
First Posted (ACTUAL) 2020-06-11	Results First Posted N/A	Last Verified 2025-01

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

Design Details

Primary Purpose:
Treatment

Allocation:
Non Randomized

Interventional Model:
Sequential

Masking:
None

Arms and Interventions

Participant Group/Arm	Intervention/Treatment
EXPERIMENTAL: CISH CRISPR TIL / Phase I Arm Non-myeloablative, lymphodepleting preparative regimen of cyclophosphamide and fludarabine +escalating doses of CISH inactivated TIL + high-dose aldesleukin	DRUG: Cyclophosphamide Day -6 and Day -5: Cyclophosphamide 60 mg/kg/dose as a 2 hour intravenous infusion with Mesna 15 mg/kg/dose, 1st dose prior to Cyclophosphamide infusion then at 3,6,9 and 12 hours later. DRUG: Fludarabine Day -7 to Day -3 : Fludarabine 25 mg/m^2/dose as a 1 hour intravenous infusion per institutional guidelines once a day for 5 doses beginning on Day -7. Fludarabine will be started approximately 1 to 2 hours after the cyclophosphamide on Day -6 and Day -5. BIOLOGICAL: Tumor-Infiltrating Lymphocytes (TIL) Day 0 : Each bag of autologous CISH inactivated TIL for infusion will be administered intravenously (IV) on the Patient Care Unit over 10-20 minutes at assigned dose level. DRUG: Aldesleukin Days 1-4 : Aldesleukin at 720,000 U/kg as an intravenous infusion, every 8 -12 hours but, no more than 24 hours apart as tolerated for up to 6 doses.
EXPERIMENTAL: CISH CRISPR TIL / Phase II Arm Non-myeloablative, lymphodepleting preparative regimen of cyclophosphamide and fludarabine + MTD of CISH inactivated TIL	DRUG: Cyclophosphamide Day -6 and Day -5: Cyclophosphamide 60 mg/kg/dose as a 2 hour intravenous infusion with Mesna 15 mg/kg/dose, 1st dose prior to Cyclophosphamide infusion then at 3,6,9 and 12 hours later. DRUG: Fludarabine Day -7 to Day -3 : Fludarabine 25 mg/m^2/dose as a 1 hour intravenous infusion per institutional guidelines once a day for 5 doses beginning on Day -7. Fludarabine will be started approximately 1 to 2 hours after the cyclophosphamide on Day -6 and Day -5. BIOLOGICAL: Tumor-Infiltrating Lymphocytes (TIL) Day 0 : Each bag of autologous CISH inactivated TIL for infusion will be administered intravenously (IV) on the Patient Care Unit over 10-20 minutes at assigned dose level. DRUG: Aldesleukin Days 1-4 : Aldesleukin at 720,000 U/kg as an intravenous infusion, every 8 -12 hours but, no more than 24 hours apart as tolerated for up to 6 doses.

Participant Group/Arm

Intervention/Treatment

EXPERIMENTAL: CISH CRISPR TIL / Phase I Arm

Non-myeloablative, lymphodepleting preparative regimen of cyclophosphamide and fludarabine +escalating doses of CISH inactivated TIL + high-dose aldesleukin

DRUG: Cyclophosphamide

Day -6 and Day -5: Cyclophosphamide 60 mg/kg/dose as a 2 hour intravenous infusion with Mesna 15 mg/kg/dose, 1st dose prior to Cyclophosphamide infusion then at 3,6,9 and 12 hours later.

DRUG: Fludarabine

Day -7 to Day -3 : Fludarabine 25 mg/m^2/dose as a 1 hour intravenous infusion per institutional guidelines once a day for 5 doses beginning on Day -7. Fludarabine will be started approximately 1 to 2 hours after the cyclophosphamide on Day -6 and Day -5.

BIOLOGICAL: Tumor-Infiltrating Lymphocytes (TIL)

Day 0 : Each bag of autologous CISH inactivated TIL for infusion will be administered intravenously (IV) on the Patient Care Unit over 10-20 minutes at assigned dose level.

DRUG: Aldesleukin

Days 1-4 : Aldesleukin at 720,000 U/kg as an intravenous infusion, every 8 -12 hours but, no more than 24 hours apart as tolerated for up to 6 doses.

EXPERIMENTAL: CISH CRISPR TIL / Phase II Arm

Non-myeloablative, lymphodepleting preparative regimen of cyclophosphamide and fludarabine + MTD of CISH inactivated TIL

DRUG: Cyclophosphamide

Day -6 and Day -5: Cyclophosphamide 60 mg/kg/dose as a 2 hour intravenous infusion with Mesna 15 mg/kg/dose, 1st dose prior to Cyclophosphamide infusion then at 3,6,9 and 12 hours later.

DRUG: Fludarabine

Day -7 to Day -3 : Fludarabine 25 mg/m^2/dose as a 1 hour intravenous infusion per institutional guidelines once a day for 5 doses beginning on Day -7. Fludarabine will be started approximately 1 to 2 hours after the cyclophosphamide on Day -6 and Day -5.

BIOLOGICAL: Tumor-Infiltrating Lymphocytes (TIL)

Day 0 : Each bag of autologous CISH inactivated TIL for infusion will be administered intravenously (IV) on the Patient Care Unit over 10-20 minutes at assigned dose level.

DRUG: Aldesleukin

Days 1-4 : Aldesleukin at 720,000 U/kg as an intravenous infusion, every 8 -12 hours but, no more than 24 hours apart as tolerated for up to 6 doses.

Primary Outcome Measures	Measure Description	Time Frame
Maximum tolerated dose (MTD)	Highest dose at which less than or equal to 1 of 6 patients experienced a DLT or the highest dose level studied if DLTs are not observed at any of the dose levels	28 Days Post IL-2
Preliminary efficacy of tumor reactive autologous lymphocytes with knockout of CISH gene in patients with refractory metastatic gastrointestinal epithelial cancers: changes in diameter	Changes in the largest diameter (unidimensional measurement) of the tumor lesions and the shortest diameter in the case of malignant lymph nodes are used in the RECIST v1.1 criteria	Every 4 Weeks for the first three months, then every 8 weeks thereafter, up to 2 years
Safety of tumor reactive autologous lymphocytes with knockout of the CISH gene - Incidence of Adverse Events	Incidence of Adverse Events	2 Years or Disease Progression

Secondary Outcome Measures	Measure Description	Time Frame
Progression-Free Survival (PFS)	Progression-Free Survival (PFS) of patients with metastatic gastrointestinal cancers treated using the autologous lymphocytes	2 Years or Disease Progression
Overall Survival (OS)	Overall Survival (OS) of patients with metastatic gastrointestinal cancers treated using the autologous lymphocytes	2 Years or Disease Progression
Toxicity profiles resulting from treatment using these engineered tumor-infiltrating lymphocytes	Incidence of targeted toxicities events	2 Years or Disease Progression

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person’s general health condition or prior treatments.

Ages Eligible for Study:
ALL

Sexes Eligible for Study:
18 Years

Accepts Healthy Volunteers:

Diagnosis of metastatic gastrointestinal epithelial cancer with progressive disease following at least one first line standard therapy. When available, archived tissue from original diagnosis will be obtained for research related testing.
Must have measurable disease per RECIST 1.1 with at least one lesion identified as resectable for TIL generation (minimum volume of tumor tissue required is 1 cm^2 as single mass or fragments) and at least one other lesion meeting the RECIST criteria for measurable to serve as an indicator of disease response. The location of the tumor for TIL generation and method used to obtain (i.e. laparoscopy, endoscopic ultra sound, etc.) will be determined based on an individual patient's disease.
Patients with 3 or fewer brain metastases that are less than 1 cm in diameter and asymptomatic are eligible. Lesions that have been treated with stereotactic radiosurgery must be clinically stable for 1 month after treatment for the patient to be eligible. Patients with surgically resected brain metastases are eligible. Patients must not be receiving systemic steroids.
Brain metastases are assessed using the Response Assessment in Neuro-Oncology Brain Metastases (RANO-BM) criteria.
Age ≥ 18 years and ≤ 70 years.
Clinical performance status of ECOG 0 or 1.
Serology testing within 3 months of study enrollment (tumor collection):

Seronegative for HIV antibody. (The investigational treatment being evaluated in this protocol depends on an intact immune system. Patients who are HIV seropositive can have decreased immunocompetence and thus may be less responsive to the study treatment and more susceptible to its toxicities.)
Seronegative for hepatitis B antigen, and seronegative for hepatitis C antibody. If hepatitis C antibody test is positive, then patient must be tested for the presence of antigen by RT-PCR and be HCV RNA negative.
Seronegative for anti-HBc, HBV/HCV/HIV-1 NAT, anti-HTLV-I/II, anti-T.cruzi, West Nile Virus NAT, anti-CMV, and RPR. (Note: Other blood viral testing may be required as updated on the FDA website: https://www.fda.gov/BiologicsBloodVaccines/SafetyAvailability/TissueSafety/ucm095440.htm#approved)
Hematology within 14 days of study enrollment:

Absolute neutrophil count > 1000/mm^3 without the support of filgrastim
WBC ≥ 3000/mm^3
Platelet count ≥ 75,000/mm^3
Hemoglobin > 8.0 g/dl. Subjects may be transfused to reach this cutoff.
Adequate organ function within 14 days of study enrollment defined as:

Serum ALT and AST ≤ 5.0 x ULN
Serum creatinine ≤ 1.6 mg/dl
Total bilirubin ≤ to 2.0 mg/dl, except in patients with Gilbert's Syndrome, who must have a total bilirubin ≤ 3.0 mg/dl.
More than four weeks must have elapsed since prior systemic therapy at the time the patient receives the preparative regimen, and acute toxicities must have recovered to Grade 1 or less (except for toxicities such as alopecia or vitiligo). Disease appropriate standard therapy is permitted between tumor collection and start of the fludarabine and cyclophosphamide. Investigational therapy is prohibited.

Willing to undergo outpatient non-mobilized leukapheresis (3 hour collection) prior to the tumor collection
Agrees to remain in the Twin Cities metropolitan area (within 1 hour drive of the University of Minnesota) after the CISH KO TILs infusion through the End of Treatment visit (Day 28)
Voluntary written consent prior to the performance of any research related procedures

Pregnant or breastfeeding because of the potentially dangerous effects of the treatment on the fetus or infant. Women of childbearing potential (defined as menses within previous 12 month and/or FSH ≤ 40 IU/L) must have a negative pregnancy test (serum or urine) within 7 days of enrollment. A repeat negative pregnancy test is required within 7 days of beginning the preparative chemotherapy.
Any form of primary immunodeficiency (such as Severe Combined Immunodeficiency Disease).
Concurrent opportunistic infection (The treatment being evaluated in this protocol depends on an intact immune system. Patients who have decreased immune-competence may be less responsive to the treatment and more susceptible to its toxicities).
Active systemic infections requiring anti-infective treatment, coagulation disorders or any other active major medical illnesses.
Concurrent systemic steroid therapy.
History of severe immediate hypersensitivity reaction to cyclophosphamide, fludarabine, or aldesleukin.
History of coronary revascularization or ischemic symptoms.
Documented LVEF ≤ 45% tested in patients:

Age ≥ 65 years and/or
With clinically significant atrial and/or ventricular arrhythmias, including but not limited to: atrial fibrillation, ventricular tachycardia, second- or third-degree heart block, or have a history of ischemic heart disease and/or chest pain. Patients < 65 years of age who present with cardiac risk factors (e.g., diabetes, hypertension, obesity) may undergo cardiac evaluation as noted above.
Clinically significant patient history that in the judgment of the PI would compromise the patient's ability to tolerate high-dose aldesleukin.
Documented FEV1 ≤ 50% predicted tested in patients with:

A prolonged history of cigarette smoking (approximately 20 packs/year within the past 2 years) and/or
Symptoms of respiratory dysfunction
Receiving any investigational agents.

Clinical performance status of ECOG 0 or 1
Hematology within 7 days of starting lymphodepleting chemotherapy:

Absolute neutrophil count > 1000/mm^3 without the support of filgrastim
WBC ≥ 3000/mm^3
Platelet count ≥ 100,000/mm^3
Hemoglobin > 8.0 g/dl. Subjects may be transfused to reach this cutoff.
Adequate organ function within 7 days of starting lymphodepleting chemotherapy:

Serum ALT and AST ≤ 5.0 x ULN
Serum creatinine ≤ 1.6 mg/dl
Total bilirubin ≤ to 2.0 mg/dl, except in patients with Gilbert's Syndrome, who must have a total bilirubin ≤ 3.0 mg/dl.
Seronegative for HIV antibody, hepatitis B antigen, and hepatitis C antibody as tested within 3 months of beginning lymphodepleting chemotherapy. If hepatitis C antibody test is positive, then patient must be tested for the presence of antigen by RT-PCR and be HCV RNA negative
More than four weeks must have elapsed since the last dose of prior systemic therapy and the start of the lymphodepleting chemotherapy, and acute toxicities must have recovered to Grade 1 or less (except for toxicities such as alopecia or vitiligo).
Sexually active females of child-bearing potential and males with female partners of child-bearing potential must agree to use effective contraception for the duration of study treatment starting with the 1st dose of fludarabine and for 4 months after the last dose of aldesleukin. Examples of effective contraception includes an IUD or implant plus a condom. Women of non-childbearing potential are defined as those who have no uterus, ligation of the fallopian tubes, or permanent cessation of ovarian function due to ovarian failure or surgical removal of the ovaries. A woman also is presumed to be infertile due to natural causes if she has been amenorrheic for > 12 months and/or has an FSH > 40 IU/L.
Negative pregnancy test within 7 days of starting lymphodepleting chemotherapy in women of childbearing potential.
No change in medical status or social situation that would make study participation not in the best interest of the patient in the opinion of the enrolling investigator.
Continues to agree to remain in the Twin Cities metropolitan area (within 1 hour drive of the University of Minnesota) after the CISH KO TILs infusion through the End of Treatment visit (Day 28)
Voluntary signed the study treatment consent form within 28 days prior to the start of the lymphodepleting chemotherapy.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Masonic Cancer Center, University of Minnesota

Investigators

PRINCIPAL_INVESTIGATOR: Emil Lou, MD, PhD, Division of Hematology, Oncology and Transplantation, University of Minnesota

Publications

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Palmer DC, Guittard GC, Franco Z, Crompton JG, Eil RL, Patel SJ, Ji Y, Van Panhuys N, Klebanoff CA, Sukumar M, Clever D, Chichura A, Roychoudhuri R, Varma R, Wang E, Gattinoni L, Marincola FM, Balagopalan L, Samelson LE, Restifo NP. Cish actively silences TCR signaling in CD8+ T cells to maintain tumor tolerance. J Exp Med. 2015 Nov 16;212(12):2095-113. doi: 10.1084/jem.20150304. Epub 2015 Nov 2.
Osborn MJ, Webber BR, Knipping F, Lonetree CL, Tennis N, DeFeo AP, McElroy AN, Starker CG, Lee C, Merkel S, Lund TC, Kelly-Spratt KS, Jensen MC, Voytas DF, von Kalle C, Schmidt M, Gabriel R, Hippen KL, Miller JS, Scharenberg AM, Tolar J, Blazar BR. Evaluation of TCR Gene Editing Achieved by TALENs, CRISPR/Cas9, and megaTAL Nucleases. Mol Ther. 2016 Mar;24(3):570-81. doi: 10.1038/mt.2015.197. Epub 2015 Oct 27.
Tran E, Ahmadzadeh M, Lu YC, Gros A, Turcotte S, Robbins PF, Gartner JJ, Zheng Z, Li YF, Ray S, Wunderlich JR, Somerville RP, Rosenberg SA. Immunogenicity of somatic mutations in human gastrointestinal cancers. Science. 2015 Dec 11;350(6266):1387-90. doi: 10.1126/science.aad1253. Epub 2015 Oct 29.
Johnson MJ, Sumstad D, Folsom TD, Slipek NJ, DeFeo AP, Growe M, Kadidlo D, Thyagarajan B, Starr TK, Lou E, Choudhry M, Moriarity BS, Webber BR, McKenna DH. Clinical manufacture of CRISPR/Cas9-based cytokine-induced SH2 protein knock-out tumor-infiltrating lymphocytes for gastrointestinal cancers. Cytotherapy. 2025 Jun 21:S1465-3249(25)00746-7. doi: 10.1016/j.jcyt.2025.06.007. Online ahead of print.
Lou E, Choudhry MS, Starr TK, Folsom TD, Bell J, Rathmann B, DeFeo AP, Kim J, Slipek N, Jin Z, Sumstad D, Klebanoff CA, Ladner K, Sarkari A, McIvor RS, Murray TA, Miller JS, Rao M, Jensen E, Ankeny J, Khalifa MA, Chauhan A, Spilseth B, Dixit A, Provenzano PP, Pan W, Weber D, Byrne-Steele M, Henley T, McKenna DH, Johnson MJ, Webber BR, Moriarity BS. Targeting the intracellular immune checkpoint CISH with CRISPR-Cas9-edited T cells in patients with metastatic colorectal cancer: a first-in-human, single-centre, phase 1 trial. Lancet Oncol. 2025 May;26(5):559-570. doi: 10.1016/S1470-2045(25)00083-X. Epub 2025 Apr 29.

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