Pathophysiological Role of Histamine H4 Receptor in Cancer: Therapeutic Implications

Area of Science:

• Immunology and Oncology
• Pharmacology

Background:

• Cancer remains a leading cause of death globally, with current therapies often exhibiting poor response rates and severe toxicity.
• Targeting novel molecules within the tumor microenvironment is crucial for enhancing anti-cancer efficacy.
• The histamine H4 receptor (H4R) plays a significant role in modulating immune responses.

Purpose of the Study:

• To summarize current knowledge on histamine H4 receptor (H4R) pharmacology and the clinical use of its ligands.
• To review recent data on H4R expression and its pathophysiological role in various cancers.
• To evaluate H4R as a potential molecular target for novel cancer therapeutics.

Main Methods:

• Literature review of H4R pharmacology and clinical applications of H4R ligands.
• Analysis of The Cancer Genome Atlas (TCGA) database for H4R gene expression in human cancers.
• Description of H4R gene and protein expression in different cancer types versus normal tissues.
• Examination of the relationship between H4R expression and patient prognosis (survival).

Main Results:

• The histamine H4 receptor (H4R) gene is expressed in multiple human cancers, including bladder, kidney, breast, gastrointestinal, lung, endometrial, and skin cancers.
• Data on H4R expression and its pathophysiological role in cancer are emerging.
• The study will detail H4R expression levels and their correlation with patient survival outcomes.

Conclusions:

• The histamine H4 receptor (H4R) is present in various cancer types, indicating its potential as a therapeutic target.
• Further research into H4R's role in cancer pathophysiology and its modulation by ligands could lead to improved anti-neoplastic strategies.
• H4R represents a promising avenue for developing more effective and less toxic cancer treatments.