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Histidine and Immunotherapy Response in Colorectal Cancer

12. mai 2026 oppdatert av: Jing-yuan Fang, MD, Ph. D

Mechanistic Study of Histidine-mediated Regulation of Antigen Presentation in Colorectal Cancer to Enhance Sensitivity to Immunotherapy

This observational study aims to investigate the role of histidine and its transporter SLC15A3 in modulating the sensitivity of colorectal cancer to immunotherapy. By analyzing the expression of SLC15A3 in tumor/normal colonic tissues from patients with colorectal cancer and assessing serum histidine metabolic levels, the study seeks to identify potential targets associated with therapeutic resistance and explore possible intervention strategies to improve immune checkpoint blockade treatment efficacy.

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Studietype

Observasjonsmessig

Registrering (Antatt)

150

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studer Kontakt Backup

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen
  • Eldre voksen

Tar imot friske frivillige

Nei

Prøvetakingsmetode

Ikke-sannsynlighetsprøve

Studiepopulasjon

Patients with pathologically confirmed colorectal cancer who received care at the Department of Gastroenterology, Department of Oncology, or Department of General Surgery at Renji Hospital, Shanghai Jiao Tong University School of Medicine.

Beskrivelse

Inclusion Criteria:

  1. Participants aged ≥18 years and ≤100 years.
  2. Patients pathologically diagnosed with colorectal cancer based on colonoscopy or surgical specimens and biopsy examination; or patients who previously received PD-1 monoclonal antibody immunotherapy for colorectal cancer.

Exclusion Criteria:

  1. Age <18 years.
  2. Presence of poorly controlled metabolic diseases, including hypertension, diabetes mellitus, hyperlipidemia, hyperuricemia, or hyperthyroidism.
  3. Presence of other severe gastrointestinal diseases, including inflammatory bowel disease, ischemic bowel disease, familial adenomatous polyposis, liver cirrhosis, MUTYH-associated polyposis (MAP), Lynch syndrome (LS), or Peutz-Jeghers syndrome (PJS).
  4. History of other malignant tumors, or pathological diagnosis of colorectal inflammatory polyps, hyperplastic polyps, neuroendocrine tumors, neuroendocrine carcinoma, or mixed neuroendocrine-non-neuroendocrine neoplasms.
  5. History of neurological or psychiatric disorders, such as epilepsy or depression.
  6. Unqualified specimens, including hemolyzed serum samples or tissue samples that were not properly preserved in time.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Kohorter og intervensjoner

Gruppe / Kohort
Intervensjon / Behandling
Colorectal cancer patients
Patients with pathologically confirmed colorectal cancer. Colorectal tumor and adjacent normal tissue specimens will be analyzed for SLC15A3 expression, or serum specimen will be analyzed for histidine-related metabolites, or whole blood samples will be analyzed for peripheral blood immune cell functions.
Annen: Immunohistochemistry or immunofluorescence
Formalin-fixed paraffin-embedded (FFPE) colorectal tumor and adjacent normal tissue specimens will be analyzed for SLC15A3 expression by immunohistochemistry and/or immunofluorescence.
Annen: Flow cytometry
Peripheral blood mononuclear cells (PBMCs) will be separated from whole blood samples and assessed for immune cell phenotype and functional markers by flow cytometry.
ICB responders
Patients with colorectal cancer who previously received PD-1 immune checkpoint blockade and achieved a clinical response. Tumor tissue will be analyzed for SLC15A3 expression, and serum specimen will be analyzed for histidine-related metabolites.
Annen: Immunohistochemistry or immunofluorescence
Formalin-fixed paraffin-embedded (FFPE) colorectal tumor and adjacent normal tissue specimens will be analyzed for SLC15A3 expression by immunohistochemistry and/or immunofluorescence.
Annen: Serum metabolomic analysis or ELISA
Serum specimens from patients with colorectal cancer will be analyzed for histidine and related metabolites and selected biomarkers by metabolomics and/or ELISA.
ICB non-responders
Patients with colorectal cancer who previously received PD-1 immune checkpoint blockade and did not achieve a clinical response. Tumor tissue will be analyzed for SLC15A3 expression, and serum specimen will be analyzed for histidine-related metabolites.
Annen: Immunohistochemistry or immunofluorescence
Formalin-fixed paraffin-embedded (FFPE) colorectal tumor and adjacent normal tissue specimens will be analyzed for SLC15A3 expression by immunohistochemistry and/or immunofluorescence.
Annen: Serum metabolomic analysis or ELISA
Serum specimens from patients with colorectal cancer will be analyzed for histidine and related metabolites and selected biomarkers by metabolomics and/or ELISA.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
SLC15A3 expression
Tidsramme: Baseline archival tissue specimen from surgical resection or diagnostic biopsy.
SLC15A3 expression measured by immunohistochemistry (IHC) or immunofluorescence in formalin-fixed paraffin-embedded colorectal tumor and adjacent normal tissue specimens.
Baseline archival tissue specimen from surgical resection or diagnostic biopsy.
Serum histidine concentration
Tidsramme: Baseline and after 9 weeks (one round of treatment).
Serum histidine concentration measured using liquid chromatography-mass spectrometry (LC-MS) in serum samples collected before treatment initiation and, where available, after 9 weeks (one round of treatment).
Baseline and after 9 weeks (one round of treatment).

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Progression-free survival
Tidsramme: 5 years.
Progression-free survival, defined as the time from initial diagnosis or treatment initiation to documented disease progression, recurrence, or death from any cause, whichever occurs first, in patients with colorectal cancer with available follow-up information.
5 years.
Overall survival
Tidsramme: 5 years.
Overall survival, defined as the time from initial diagnosis or treatment initiation to death from any cause in patients with colorectal cancer with available follow-up information.
5 years.
Percentage of IFN-gamma-positive T cells
Tidsramme: Baseline and after 9 weeks (one round of treatment).
Peripheral blood mononuclear cells (PBMCs) from archived blood samples of patients with colorectal cancer will be assessed by flow cytometry to evaluate the percentage of IFN-gamma-positive T cells as a T cell effector function marker. Samples collected before treatment initiation and, where available, after 9 weeks (one round of treatment) will be analyzed.
Baseline and after 9 weeks (one round of treatment).
Percentage of granzyme B-positive T cells
Tidsramme: Baseline and after 9 weeks (one round of treatment).
Peripheral blood mononuclear cells (PBMCs) from archived blood samples of patients with colorectal cancer will be assessed by flow cytometry to evaluate the percentage of granzyme B-positive T cells as a T cell effector function marker. Samples collected before treatment initiation and, where available, after 9 weeks (one round of treatment) will be analyzed.
Baseline and after 9 weeks (one round of treatment).
Clinicopathological characteristics
Tidsramme: Baseline at initial diagnosis or tissue collection.
Clinicopathological characteristics of patients with colorectal cancer, including age, sex, tumor location, AJCC TNM stage, and histological grade, extracted from available medical records.
Baseline at initial diagnosis or tissue collection.

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Jing-yuan Fang, MD, Ph. D

Etterforskere

  • Hovedetterforsker: Jing-Yuan Fang, M.D., Division of Gastroenterology and Hepatology, NHC Key Laboratory of Digestive Diseases, Renji Hospital, School of Medicine, Shanghai Jiao Tong University

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

1. mai 2026

Primær fullføring (Antatt)

1. desember 2026

Studiet fullført (Antatt)

1. juni 2027

Datoer for studieregistrering

Først innsendt

24. april 2026

Først innsendt som oppfylte QC-kriteriene

12. mai 2026

Først lagt ut (Faktiske)

14. mai 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

14. mai 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

12. mai 2026

Sist bekreftet

1. mai 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • KY2025-053-B

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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