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1.
ARYA Atheroscler ; 19(2): 42-49, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38883568

RESUMO

BACKGROUND: The Isfahan Twin Cohort (ITC) aims to provide a comprehensive understanding of the interplay between genetics and environment in the development of Non-Communicable Diseases (NCDs). As a type of specialized epidemiological investigation, twin studies are designed to quantify the contribution of genetics to a particular phenotype when confronted with environmental factors. In this context, the present study aims to present a detailed overview of the ITC methodology. METHOD: The ITC is a prospective longitudinal study started in 2020. Data collection, including the demographics, socioeconomic status, health-related habits, medical history, and zygosity of the participants, was performed using validated questionnaires. Moreover, anthropometric measurements and blood pressure assessments were performed by a trained nurse. Also, fasting blood and morning urine samples were collected during a morning visit, and biochemical investigations were conducted at the central laboratory of the Isfahan Cardiovascular Research Institute. The participants underwent follow-up telephone interviews biannually, in which brief questionnaires were filled out on the changes in the lifestyle factors of the participants, such as diet, physical activity, psychological factors, and smoking habits. The second and final follow-up visit will include complete assessments, including blood and biological sample collections, similar to the baseline assessment. RESULTS: The ITR has registered a total of 112 (n=224) monozygotic and 291 (n=582) dizygotic twin pairs during two years. The age range of the participants is 1 month to 56 years. Until November 2020 / 2021, the registered twins were categorized by age and included 48 pairs (n=96) in the infant group (monozygotic: 7 pairs, dizygotic: 41 pairs); 283 pairs (n=566) in the early childhood, late childhood, and adolescent groups (monozygotic: 74 pairs, dizygotic: 209 pairs); and 72 pairs (n=144) in the adult group (monozygotic: 31 pairs, dizygotic: 41 pairs). CONCLUSIONS: The cohort is being prospectively followed with plans to investigate the clinical utility of the newly developed biomarkers and gene-environmental interactions in the future.

3.
Twin Res Hum Genet ; 22(6): 579-582, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31955715

RESUMO

Twin studies are one of the main tools for studying the interaction between genes and the environment in the development of complex diseases such as cancers, cardiovascular diseases and diabetes. The Isfahan Twin Registry (ITR) was launched in Isfahan in 2017 as a pilot study to establish a nationwide twin registry in Iran and aims to obtain comprehensive information about complex diseases and their risk factors from twins and multiples living in Isfahan. ITR will continue to recruit twins and multiples until all twins residing in Isfahan are registered in the registry. Twins are identified from welfare agencies, public health homes, maternity hospitals, Persian Twins Association and the local media. Demographic information, twin similarities, lifestyle, family history of diseases and past medical history are collected using validated questionnaires. Anthropometric measurements and blood pressure are measured by health professionals. Hematology panel, fasting blood sugar, total cholesterol, low-density lipoprotein, high-density lipoprotein, aspartate aminotransferase, alanine aminotransferase and quantitative C-reactive protein are measured by an automated analyzer. Extra samples are obtained for future studies. For twins aged under 6 years, parents complete the questionnaires for their children and a brief questionnaire for themselves. Currently, 998 persons (395 pairs and 67 multiples) are registered in the ITR and have provided their data. Results of preliminary data analysis are discussed in this article. We plan to carry out longitudinal assessments. ITR can play an important role in future epigenetic, biomarkers and omics studies using the biobank materials.


Assuntos
Biomarcadores/análise , Doenças em Gêmeos/epidemiologia , Doenças em Gêmeos/genética , Epigênese Genética , Sistema de Registros/estatística & dados numéricos , Gêmeos Dizigóticos/genética , Gêmeos Monozigóticos/genética , Adolescente , Adulto , Criança , Pré-Escolar , Doenças em Gêmeos/fisiopatologia , Projetos de Pesquisa Epidemiológica , Feminino , Seguimentos , Humanos , Lactente , Recém-Nascido , Irã (Geográfico)/epidemiologia , Estilo de Vida , Masculino , Projetos Piloto , Prognóstico , Adulto Jovem
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