From Diversity to Standardization: Unveiling Key Parameters in Chick Ileum Bioassays for Enhanced Pharmacology Education and Research

Background: As traditional laboratory animal use faces ethical and logistical constraints, the chick ileum has been experimented with as an alternate tissue for bioassays, which is crucial for drug discovery and pharmacology education. However, the absence of uniform bioassay protocols for chick ileum presents a significant challenge, impacting the accuracy and reliability of results in pharmacological studies. Objectives: The objective of this review was to compile existing data on chick ileum bioassays from published sources, aiming to enhance future experiments and contribute to the establishment of standardized methods for conducting these bioassays. Methodology: We conducted a systematic literature review, utilizing keywords like “Chick ileum,” “Bioassay,” “Acetylcholine,” and “Histamine” across databases such as PubMed, Google Scholar, and ScienceDirect. The study selection adhered to specified inclusion and exclusion criteria, focusing on chick ileum research. Data extraction and subsequent analysis were performed to retrieve data for the experiment. Results: Eleven articles were selected after applying strict inclusion criteria. Studies ranged from 1967 to 2019, with diverse physiological salt solutions and varied responses to essential chemicals like acetylcholine and histamine. Assay methods varied, but three-point assays were common. Commonly employed tissue lengths and temperatures were identified, and additional factors like organ bath volume and aeration were crucial for consistent results. Conclusion: The review highlights the feasibility and ethical advantages of using chick ileum for bioassays. Despite challenges like variable tissue responses and methodological diversity, the review suggests these can be navigated with careful optimization, making chick ileum a valuable model for pharmacological research and education.