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Prediction of the First-Pass Metabolism of a Drug After Oral Intake Based on Structural Parameters and Physicochemical Properties

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Abstract

Background and Objective

The oral first-pass metabolism is a crucial factor that plays a key role in a drug’s pharmacokinetic profile. Prediction of the oral first-pass metabolism based on chemical structural parameters can be useful in the drug-design process. Developing an orally administered drug with an acceptable pharmacokinetic profile is necessary to reduce the cost and time associated with evaluating the extent of the first-pass metabolism of a candidate compound in preclinical studies. The aim of this study is to estimate the first-pass metabolism of an orally administered drug.

Methods

A set of compounds with reported first-pass metabolism data were collected. Moreover, human intestinal absorption percentage and oral bioavailability data were extracted from the literature to propose a classification system that split the drugs up based on their first-pass metabolism extents. Various structural parameters were calculated for each compound. The relations of the structural and physicochemical values of each compound to the class the compound belongs to were obtained using logistic regression.

Results

Initial analysis showed that compounds with logD7.4 > 1 or a rugosity factor of > 1.5 are more likely to have high first-pass metabolism. Four different models that can predict the oral first-pass metabolism with acceptable error were introduced. The overall accuracies of the models were in the range of 72% (for models with simple descriptors) to 78% (for models with complex descriptors). Although the models with simple descriptors have lower accuracies compared to complex models, they are more interpretable and easier for researchers to utilize.

Conclusion

A novel classification of drugs based on the extent of the oral first-pass metabolism was introduced, and mechanistic models were developed to assign candidate compounds to the appropriate proposed classes.

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Correspondence to Ali Shayanfar.

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Author Contributions

MAHH: data analysis and interpretation, drafting the article; AAA: data analysis; AS: design of the work, supervision of the project, critical revision of the article. All authors read and approved the final manuscript.

Funding

The research reported in this publication was supported by the Student Research Committee, Tabriz University of Medical Sciences (grant no: 73084).

Conflict of interest

Mir Amir Hossein Hosseini, Ali Akbar Alizadeh, and Ali Shayanfar have no conflict of interest.

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Data Availability

All of the data associated with analyzing the descriptors, developing the equations and modeling, and the validation of the models are available as supplementary material on the journal’s website, along with the published article.

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Hosseini, M.A.H., Alizadeh, A.A. & Shayanfar, A. Prediction of the First-Pass Metabolism of a Drug After Oral Intake Based on Structural Parameters and Physicochemical Properties. Eur J Drug Metab Pharmacokinet (2024). https://doi.org/10.1007/s13318-024-00892-6

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