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Activating and inactivating hormone receptor mutations
1Department of Physiology, University of Turku, Finland, and Department of Obstetrics and Gynaecology, University of Aberdeen, UK. ilpo.huhtaniemi@utu.fi
Abstract:
The unravelling of gene structures of hormones, their receptors and the various components of their signal transduction apparatus has enabled diagnosis of the aetiology of hormone resistance at the molecular level. Inactivating mutations can be found in hormone receptor genes or those encoding components of the post-receptor signal transduction cascade. Another category of receptor mutation is that causing constitutive receptor activation, which results in ligand-independent, inappropriate or supraphysiological hormone action and in some cases malignant growth. The purpose of this contribution is to review the different types of inactivation and activation mechanisms that are induced by receptor mutations, using some of the best characterised mutations as examples. In addition, the currently known mutations of hormone receptors are briefly summarised.
Insights
Gene mutations in hormone receptors and signal pathways can cause hormone resistance or overactivity. This review examines inactivating and activating mutation mechanisms, aiding molecular diagnosis.
Area of Science:
- Endocrinology
- Molecular Biology
- Genetics
Background:
- Advances in gene sequencing allow molecular-level diagnosis of hormone resistance.
- Hormone action relies on receptor genes and signal transduction pathways.
- Mutations in these components can disrupt normal hormonal regulation.
Purpose of the Study:
- To review mechanisms of hormone receptor inactivation and activation.
- To use well-characterized mutations as examples of these mechanisms.
- To summarize known hormone receptor mutations.
Main Methods:
- Review of scientific literature on hormone receptor mutations.
- Analysis of characterized genetic mutations.
- Summary of existing data on hormone receptor genetic alterations.
Main Results:
- Identified inactivating mutations in hormone receptor or signal transduction genes.
- Described activating mutations causing constitutive receptor activity and potential malignancy.
- Provided examples of specific receptor mutations and their functional consequences.
Conclusions:
- Receptor mutations are key to understanding hormone resistance and overactivity.
- Molecular diagnostics are crucial for identifying the aetiology of endocrine disorders.
- Further research into hormone receptor mutations can reveal new therapeutic targets.