Patricia Mora-Criollo , Reetobrata Basu , Yanrong Qian , Jaime A. Costales , Jaime Guevara-Aguirre , Mario J. Grijalva , John J. Kopchick
{"title":"Growth hormone modulates Trypanosoma cruzi infection in vitro","authors":"Patricia Mora-Criollo , Reetobrata Basu , Yanrong Qian , Jaime A. Costales , Jaime Guevara-Aguirre , Mario J. Grijalva , John J. Kopchick","doi":"10.1016/j.ghir.2022.101460","DOIUrl":null,"url":null,"abstract":"<div><h3>Objective</h3><p><span>Chagas disease<span> (CD) is caused by the protozoan parasite, </span></span><span><span>Trypanosoma cruzi</span></span>. It affects 7 to 8 million people worldwide and leads to approximately 50,000 deaths per year. <em>In vitro</em> and <em>in vivo</em><span> studies had demonstrated that Trypanosoma cruziinfection causes an imbalance in the hypothalamic-pituitary-adrenal (HPA) axis that is accompanied by a progressive decrease in growth hormone (GH) and prolactin (PRL) production. In humans, inactivating mutations in the GH receptor<span> gene cause Laron Syndrome<span> (LS), an autosomal recessive disorder. Affected subjects are short, have increased adiposity, decreased insulin-like growth factor-I (IGF</span></span></span><img><span>I), increased serum GH levels, are highly resistant to diabetes and cancer, and display slow cognitive decline. In addition, CD incidence in these individuals is diminished despite living in highly endemic areas. Consequently, we decided to investigate the </span><em>in vitro</em> effect of GH/IGF-I on <em>T. cruzi</em> infection<em>.</em></p></div><div><h3>Design</h3><p><span>We first treated the parasite and/or host cells with different peptide hormones including GH, IGF</span><img>I, and PRL. Then, we treated cells using different combinations of GH/IGF-I attempting to mimic the GH/IGF-I serum levels observed in LS subjects.</p></div><div><h3>Results</h3><p>We found that exogenous GH confers protection against <em>T. cruzi</em> infection. Moreover, this effect is mediated by GH and not IGF<img>I. The combination of relatively high GH (50 ng/ml) and low IGF-I (20 ng/ml), mimicking the hormonal pattern seen in LS individuals, consistently decreased <em>T. cruzi</em> infection <em>in vitro</em>.</p></div><div><h3>Conclusions</h3><p>The combination of relatively high GH and low IGF-I serum levels in LS individuals may be an underlying condition providing partial protection against <em>T. cruzi</em> infection.</p></div>","PeriodicalId":12803,"journal":{"name":"Growth Hormone & Igf Research","volume":"64 ","pages":"Article 101460"},"PeriodicalIF":1.6000,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Growth Hormone & Igf Research","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S109663742200017X","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CELL BIOLOGY","Score":null,"Total":0}
引用次数: 3
Abstract
Objective
Chagas disease (CD) is caused by the protozoan parasite, Trypanosoma cruzi. It affects 7 to 8 million people worldwide and leads to approximately 50,000 deaths per year. In vitro and in vivo studies had demonstrated that Trypanosoma cruziinfection causes an imbalance in the hypothalamic-pituitary-adrenal (HPA) axis that is accompanied by a progressive decrease in growth hormone (GH) and prolactin (PRL) production. In humans, inactivating mutations in the GH receptor gene cause Laron Syndrome (LS), an autosomal recessive disorder. Affected subjects are short, have increased adiposity, decreased insulin-like growth factor-I (IGFI), increased serum GH levels, are highly resistant to diabetes and cancer, and display slow cognitive decline. In addition, CD incidence in these individuals is diminished despite living in highly endemic areas. Consequently, we decided to investigate the in vitro effect of GH/IGF-I on T. cruzi infection.
Design
We first treated the parasite and/or host cells with different peptide hormones including GH, IGFI, and PRL. Then, we treated cells using different combinations of GH/IGF-I attempting to mimic the GH/IGF-I serum levels observed in LS subjects.
Results
We found that exogenous GH confers protection against T. cruzi infection. Moreover, this effect is mediated by GH and not IGFI. The combination of relatively high GH (50 ng/ml) and low IGF-I (20 ng/ml), mimicking the hormonal pattern seen in LS individuals, consistently decreased T. cruzi infection in vitro.
Conclusions
The combination of relatively high GH and low IGF-I serum levels in LS individuals may be an underlying condition providing partial protection against T. cruzi infection.
期刊介绍:
Growth Hormone & IGF Research is a forum for research on the regulation of growth and metabolism in humans, animals, tissues and cells. It publishes articles on all aspects of growth-promoting and growth-inhibiting hormones and factors, with particular emphasis on insulin-like growth factors (IGFs) and growth hormone. This reflects the increasing importance of growth hormone and IGFs in clinical medicine and in the treatment of diseases.