{"title":"Thyroid hormones and stroke, the gap between clinical and experimental studies","authors":"Sakineh Shafia , Ashraf Khoramirad , Kobra Akhoundzadeh","doi":"10.1016/j.brainresbull.2024.110983","DOIUrl":null,"url":null,"abstract":"<div><p>Despite plenty of human studies on changes in thyroid hormones after stroke and some animal studies that assessed the effects of thyroid hormone administration on stroke, conclusive evidence for clinical application is lacking. This review aimed to determine the consistency of the results between clinical and preclinical studies. This article reviewed the PubMed, Embase, web of Knowledge, and Google Scholar databases up to June 2023 using the MeSH terms “stroke, cerebral ischemia, cerebral infarction, brain ischemia, brain infarction, triiodothyronine (T<sub>3</sub>), tetraiodothyronine (T<sub>4</sub>), thyroxine (T<sub>4</sub>), and thyroid hormone\". The results of clinical and preclinical studies related to T<sub>3</sub> substantially confirm each other. That is, in most human studies lower T<sub>3</sub> was associated with poor outcomes, and in experimental studies, T<sub>3</sub> administration also had therapeutic effects. However, the results of experimental studies related to T<sub>4</sub> could not support those of clinical studies. There seem to be some conflicts between experimental and human studies, especially regarding changes and effects of T<sub>4</sub> after stroke. The gap between experimental and clinical studies may lead to non-applicable results, wasting time and money, and unnecessary killing of animals.</p></div>","PeriodicalId":9302,"journal":{"name":"Brain Research Bulletin","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0361923024001163/pdfft?md5=8fd7c538060f235e348799e68d4e1cfe&pid=1-s2.0-S0361923024001163-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Brain Research Bulletin","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0361923024001163","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"NEUROSCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Despite plenty of human studies on changes in thyroid hormones after stroke and some animal studies that assessed the effects of thyroid hormone administration on stroke, conclusive evidence for clinical application is lacking. This review aimed to determine the consistency of the results between clinical and preclinical studies. This article reviewed the PubMed, Embase, web of Knowledge, and Google Scholar databases up to June 2023 using the MeSH terms “stroke, cerebral ischemia, cerebral infarction, brain ischemia, brain infarction, triiodothyronine (T3), tetraiodothyronine (T4), thyroxine (T4), and thyroid hormone". The results of clinical and preclinical studies related to T3 substantially confirm each other. That is, in most human studies lower T3 was associated with poor outcomes, and in experimental studies, T3 administration also had therapeutic effects. However, the results of experimental studies related to T4 could not support those of clinical studies. There seem to be some conflicts between experimental and human studies, especially regarding changes and effects of T4 after stroke. The gap between experimental and clinical studies may lead to non-applicable results, wasting time and money, and unnecessary killing of animals.
期刊介绍:
The Brain Research Bulletin (BRB) aims to publish novel work that advances our knowledge of molecular and cellular mechanisms that underlie neural network properties associated with behavior, cognition and other brain functions during neurodevelopment and in the adult. Although clinical research is out of the Journal''s scope, the BRB also aims to publish translation research that provides insight into biological mechanisms and processes associated with neurodegeneration mechanisms, neurological diseases and neuropsychiatric disorders. The Journal is especially interested in research using novel methodologies, such as optogenetics, multielectrode array recordings and life imaging in wild-type and genetically-modified animal models, with the goal to advance our understanding of how neurons, glia and networks function in vivo.