Related Experiment Video

Updated: Jun 25, 2025

Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
07:15

Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation

Published on: January 16, 2019

11.0K

No genetic causal association between iron status and pulmonary artery hypertension: Insights from a two-sample

Peng-Cheng Liu1, Meng-Na Lv2, Yan-Yan Rong3

  • 1Department of Rheumatology, The First Affiliated Hospital, Jiangxi Medical College Nanchang University Nanchang China.

Pulmonary Circulation
|May 22, 2024
PubMed

Insights

This study investigated the genetic link between iron status and pulmonary artery hypertension (PAH) using Mendelian randomization. No causal association was found between iron indicators and PAH, suggesting iron levels do not genetically influence PAH risk.

Area of Science:

  • Cardiovascular Genetics
  • Hematology
  • Genetic Epidemiology

Background:

  • Pulmonary artery hypertension (PAH) is a severe condition with complex etiology.
  • Iron status is crucial for various physiological processes, and its dysregulation is implicated in cardiovascular diseases.
  • Understanding the genetic relationship between iron status and PAH can inform therapeutic strategies.

Purpose of the Study:

  • To investigate the potential genetic causal association between key iron status indicators and pulmonary artery hypertension (PAH).
  • To utilize Mendelian randomization (MR) analysis with large-scale genome-wide association study (GWAS) data for robust genetic inference.
  • To assess the influence of serum iron, ferritin, TIBC, sTfR, and transferrin saturation on PAH risk.

Main Methods:

  • Mendelian randomization (MR) analysis was performed using summary statistics from publicly available GWAS data.
  • Five iron status biomarkers (serum iron, ferritin, TIBC, sTfR, transferrin saturation) were used as exposures, with PAH as the outcome.
  • Inverse variance weighted (IVW) method was primary; heterogeneity (Cochran's Q) and pleiotropy (MR-Egger, MR-Presso) were assessed, with additional validation using Weighted median, Simple mode, and Weighted mode methods.

Main Results:

  • The primary IVW analysis revealed no statistically significant causal association between any of the five iron status indicators and PAH (p > 0.05).
  • Sensitivity analyses using Weighted median, Simple mode, and Weighted mode methods corroborated the absence of a genetic causal link.
  • No significant heterogeneity or horizontal pleiotropy was detected across the analyses, supporting the validity of the findings.

Conclusions:

  • This MR study provides strong evidence against a direct genetic causal relationship between iron status and pulmonary artery hypertension.
  • The findings suggest that variations in iron metabolism do not genetically predispose individuals to PAH.
  • Further research may explore non-genetic interactions or alternative pathways linking iron and PAH pathophysiology.
Keywords:
Mendelian randomizationcausal associationgeneticsiron statuspulmonary artery hypertension

More Related Videos

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information09:37

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

Published on: August 15, 2019

9.7K
Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry05:53

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry

Published on: June 21, 2018

10.1K

Related Concept Videos

Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
13.3K
Law of Independent Assortment02:03

Law of Independent Assortment

While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.
55.6K
Pedigree Analysis01:35

Pedigree Analysis

Overview
84.2K
Human Genetics01:28

Human Genetics

Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
559
Dihybrid Crosses01:18

Dihybrid Crosses

Overview
74.8K
Incomplete Dominance01:43

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
22.5K