68Ga-PMD22 PET/CT Examination Targeting CLDN18.2

Status Recruiting

Clinical Trial Summary

To investigate the ability of the CLDN18.2-targeted 68Ga-PMD22 tracer to detect CLDN18.2 expression in patients with gastric and colorectal cancer and other gastrointestinal tumours.

Clinical Trial Description

The 2016 FAST study brought a "new star" target for gastric cancer - CLDN18.2 (claudin 18 splice variant 2,CLDN18.2), which belongs to the CLDN family of tight junction proteins and is involved in the formation of paracellular tight junctions and maintenance of cell polarity. CLDN18.2 is mainly found in the normal gastric mucosa (normal gastric glands, principal cells, mural cells, endocrine cells) where the differentiation cycle is short and renewal is rapid, and in the duodenal panniculocytes, but not in the gastric stem cell region. It is now generally accepted that CLDN18.2 is expressed in normal gastric tissue confined to the tight junctions at the outer base of the gastric mucosal cells, whereas tumours undergo a change in cell polarity during malignant transformation, resulting in widespread exposure of CLDN18.2 to the cell membrane surface. The CLDN18.2 gene is also aberrantly activated and highly specific and stably expressed in specific tumour tissues, participating in the proliferation, differentiation and migration of tumour cells, making it a potentially effective target for anti-tumour drugs. In this study, a molecular probe PMD22 targeting CLDN18.2 was synthesised in a previous study and a 68Ga-PMD22 injection was developed for clinical trials. The preliminary study showed that the tracer has good safety and good imaging effect. It is proposed to further conduct exploratory PET/CT imaging studies on patients with gastric cancer, colorectal cancer and other gastrointestinal tumours, to provide a new technique for in vivo, non-invasive and visual detection of CLDN18.2 expression level and spatial distribution for patients with gastric cancer, colorectal cancer and other gastrointestinal tumours, and to validate its clinical application value for the diagnosis of gastric cancer, colorectal cancer and other gastrointestinal tumours. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT05937919
Study type	Interventional
Source	Peking Union Medical College Hospital
Contact	Rongxi Wang
Phone	+8615584172170
Email	zhzwrx.123@163.com
Status	Recruiting
Phase	Early Phase 1
Start date	May 28, 2023
Completion date	August 31, 2023

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.