Vapreotide
Overview
Vapreotide is a synthetic octapeptide analog of somatostatin with enhanced selectivity for somatostatin receptor subtypes 2 and 5. It exerts antisecretory and antiproliferative effects by binding to these receptors on neuroendocrine tumor cells and inhibiting hormone release.
Mechanism of Action
The therapeutic rationale centers on control of symptoms associated with vasoactive intestinal peptide secreting tumors and other neuroendocrine malignancies. Its longer half-life compared to native somatostatin allows for sustained receptor occupancy..
Research Summary & Key Findings
Clinical trials evaluated vapreotide for acute variceal bleeding and neuroendocrine tumor symptom control, though efficacy compared to octreotide was not consistently superior. The compound has been studied in phase III trials but did not achieve broad regulatory approval for oncology indications. Most clinical experience is derived from European studies in the 1990s and early 2000s.
Clinical Status
Vapreotide is in the investigational stage. While preclinical and early-phase data exist, it has not received regulatory approval for clinical use in the United States.
Administration Routes
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