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Histidine and Immunotherapy Response in Colorectal Cancer

12 maggio 2026 aggiornato da: 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.

Panoramica dello studio

Stato

Non ancora reclutamento

Condizioni

Intervento / Trattamento

Tipo di studio

Osservativo

Iscrizione (Stimato)

150

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

Backup dei contatti dello studio

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto
  • Adulto più anziano

Accetta volontari sani

No

Metodo di campionamento

Campione non probabilistico

Popolazione di studio

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.

Descrizione

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.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

Coorti e interventi

Gruppo / Coorte
Intervento / Trattamento
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.
Altro: 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.
Altro: 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.
Altro: 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.
Altro: 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.
Altro: 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.
Altro: 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.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
SLC15A3 expression
Lasso di tempo: 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
Lasso di tempo: 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).

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Progression-free survival
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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.

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Jing-yuan Fang, MD, Ph. D

Investigatori

  • Investigatore principale: 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

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

1 maggio 2026

Completamento primario (Stimato)

1 dicembre 2026

Completamento dello studio (Stimato)

1 giugno 2027

Date di iscrizione allo studio

Primo inviato

24 aprile 2026

Primo inviato che soddisfa i criteri di controllo qualità

12 maggio 2026

Primo Inserito (Effettivo)

14 maggio 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

14 maggio 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

12 maggio 2026

Ultimo verificato

1 maggio 2026

Maggiori informazioni

Termini relativi a questo studio

Parole chiave

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • KY2025-053-B

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

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Malattie rare

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