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Decreased lung function is associated with vitamin D deficiency in apparently health, middle aged Koreans: the Kangbuk Samsung Health Study. Eur J Clin Nutr 2020; 75:501-512. [PMID: 32934338 DOI: 10.1038/s41430-020-00748-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 08/19/2020] [Accepted: 09/04/2020] [Indexed: 11/08/2022]
Abstract
BACKGROUND/OBJECTIVES There has been inconsistent relationships between serum vitamin D levels and lung function in previous studies. However, previous studies included patients with medical diseases, affecting both vitamin D levels and lung function. Considering this view of potential confounders, we investigated if vitamin D deficiency (VDD) is linked to lung function in health screening examinee without overt medical conditions. SUBJECTS/METHODS We conducted a cohort study on 68,457 healthy Koreans (36,759 males, mean age: 37.7 years) with a health examination in 2015. Measured forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) were categorized in quartiles. To examine the relationships between VDD and lung function, adjusted odds ratios (aORs) for VDD were estimated by logistic regression. RESULTS Median vitamin D level was 14.9 ng/mL. The prevalence of VDD (defined as <20 ng/ml) was 74.5%. Compared with the highest quartile (Q4, reference), the aORs for VDD across decreasing quartiles (from Q3 to Q1) were 1.05, 1.06, 1.10 for FVC, and 1.07, 1.10, 1.10 for FEV1 (P for trend < 0.01 for both), in all subjects. Similarly, the aOR of having VDD for men also increased with decreasing quartiles of FVC and FEV1 in a dose-response manner (p for trend < 0.01 for both). However, neither FVC nor FEV1 was associated with VDD in women. CONCLUSIONS VDD was associated with decreased lung function in middle aged Korean men without overt medical conditions. VDD could be a modifiable risk factor for impaired lung function, in men but not in women.
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Park CY, Kwak SY, Jo G, Shin MJ. Genetic Association between Serum 25-Hydroxyvitamin D Levels and Lung Function in Korean Men and Women: Data from KNHANES 2011⁻2012. Nutrients 2018; 10:nu10101362. [PMID: 30249031 PMCID: PMC6212955 DOI: 10.3390/nu10101362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 09/06/2018] [Accepted: 09/21/2018] [Indexed: 01/08/2023] Open
Abstract
The association between single-nucleotide polymorphisms (SNPs) in the vitamin D metabolic pathway and lung function is unknown. We examined the association between five SNPs on DHCR7, GC, CYP2R1, and CYP24A1 along with serum 25-hydroxyvitamin D (25(OH)D) levels and lung function in older Korean men (n = 758) and women (n = 837). Lung function was determined by forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1) from the data in the Korea Nutrition and Health Examination Survey 2011–2012. Genetic risk score (GRS) was calculated by the number of 25(OH)D-decreasing alleles of the five SNPs. Our results showed that increases in GRS were associated with reduced 25(OH)D levels (p < 0.05 for both sexes). In the entire population, FVC and FEV1 were associated with both GRS and 25(OH)D levels. In women, FVC and FEV1 were negatively associated with GRS (β-coefficient (95% CI): −0.022 (−0.039, −0.005) and −0.020 (−0.035, −0.005), respectively; both p < 0.05), but not with 25(OH)D. However, in men, FVC and FEV1 were positively associated with 25(OH)D (β-coefficient (95% CI): 0.008 (0.001, 0.016) and 0.008 (0.002, 0.015), respectively; both p < 0.05), but not with GRS. In conclusion, lung function was associated with genetic variation in Korean women and with 25(OH)D in Korean men.
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Affiliation(s)
- Clara Yongjoo Park
- Department of Food and Nutrition, Human Ecology Research Institute, Chonnam National University, Gwangju 61186, Korea.
| | - So-Young Kwak
- Department of Public Health Sciences, BK21PLUS Program in Embodiment: Health-Society Interaction, Graduate School, Korea University, Seoul 02841, Korea.
| | - Garam Jo
- Department of Public Health Sciences, BK21PLUS Program in Embodiment: Health-Society Interaction, Graduate School, Korea University, Seoul 02841, Korea.
| | - Min-Jeong Shin
- Department of Public Health Sciences, BK21PLUS Program in Embodiment: Health-Society Interaction, Graduate School, Korea University, Seoul 02841, Korea.
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Suh Y, Lee C. Genome-wide association study for genetic variants related with maximal voluntary ventilation reveals two novel genomic signals associated with lung function. Medicine (Baltimore) 2017; 96:e8530. [PMID: 29095316 PMCID: PMC5682835 DOI: 10.1097/md.0000000000008530] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Genome-wide association studies (GWAS) for spirometry parameters have been limited to forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1), and their ratio. This study examined to identify genetic variants associated with maximal voluntary ventilation (MVV), an important spirometry parameter presenting inspiratory muscle strength.A total of 8842 Korean subjects participated in the Korean Association REsource Consortium were used to identify nucleotide variants associated with MVV and other spirometry parameters through a GWAS. Genetic associations were determined by employing a mixed model that can control background polygenic effects.The analysis revealed 3 nucleotide variants associated with MVV (P < 5 × 10). One (rs1496255) was also associated with FVC and FEV1. The other 2 variants were identified only for MVV and located in the genes of LOC102724340 (rs41434646) and FHIT (rs9833533). In particular, FHIT represses transcriptional activity of β-catenin, a critical protein for growth of skeletal muscle, and thus might have influenced the level of MVV.The current study revealed 2 novel nucleotide variants as genetic association signals for MVV. The association signals were suggested specific for neuromuscular diseases with a restrictive ventilatory impairment. Further studies are required to understand underlying mechanisms for their influence to restrictive lung diseases.
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Yao TC, Du G, Han L, Sun Y, Hu D, Yang JJ, Mathias R, Roth LA, Rafaels N, Thompson EE, Loisel DA, Anderson R, Eng C, Arruabarrena Orbegozo M, Young M, Klocksieben JM, Anderson E, Shanovich K, Lester LA, Williams LK, Barnes KC, Burchard EG, Nicolae DL, Abney M, Ober C. Genome-wide association study of lung function phenotypes in a founder population. J Allergy Clin Immunol 2013; 133:248-55.e1-10. [PMID: 23932459 DOI: 10.1016/j.jaci.2013.06.018] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 04/18/2013] [Accepted: 06/12/2013] [Indexed: 02/04/2023]
Abstract
BACKGROUND Lung function is a long-term predictor of mortality and morbidity. OBJECTIVE We sought to identify single nucleotide polymorphisms (SNPs) associated with lung function. METHODS We performed a genome-wide association study (GWAS) of FEV1, forced vital capacity (FVC), and FEV1/FVC in 1144 Hutterites aged 6 to 89 years, who are members of a founder population of European descent. We performed least absolute shrinkage and selection operation regression to select the minimum set of SNPs that best predict FEV1/FVC in the Hutterites and used the GRAIL algorithm to mine the Gene Ontology database for evidence of functional connections between genes near the predictive SNPs. RESULTS Our GWAS identified significant associations between FEV1/FVC and SNPs at the THSD4-UACA-TLE3 locus on chromosome 15q23 (P = 5.7 × 10(-8) to 3.4 × 10(-9)). Nine SNPs at or near 4 additional loci had P < 10(-5) with FEV1/FVC. Only 2 SNPs were found with P < 10(-5) for FEV1 or FVC. We found nominal levels of significance with SNPs at 9 of the 27 previously reported loci associated with lung function measures. Among a predictive set of 80 SNPs, 6 loci were identified that had a significant degree of functional connectivity (GRAIL P < .05), including 3 clusters of β-defensin genes, 2 chemokine genes (CCL18 and CXCL12), and TNFRSF13B. CONCLUSION This study identifies genome-wide significant associations and replicates results of previous GWASs. Multimarker modeling implicated for the first time common variation in genes involved in antimicrobial immunity in airway mucosa that influences lung function.
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Affiliation(s)
- Tsung-Chieh Yao
- Department of Human Genetics, University of Chicago, Chicago, Ill; Division of Allergy, Asthma, and Rheumatology, Department of Pediatrics, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Taoyuan, Taiwan.
| | - Gaixin Du
- Department of Human Genetics, University of Chicago, Chicago, Ill
| | - Lide Han
- Department of Human Genetics, University of Chicago, Chicago, Ill
| | - Ying Sun
- Department of Human Genetics, University of Chicago, Chicago, Ill
| | - Donglei Hu
- Department of Medicine, University of California, San Francisco, Calif
| | - James J Yang
- Department of Public Health Sciences, Henry Ford Health System, Detroit, Mich
| | - Rasika Mathias
- Division of Allergy and Clinical Immunology, Department of Medicine, The Johns Hopkins University, Baltimore, Md
| | - Lindsey A Roth
- Department of Medicine, University of California, San Francisco, Calif
| | - Nicholas Rafaels
- Division of Allergy and Clinical Immunology, Department of Medicine, The Johns Hopkins University, Baltimore, Md
| | - Emma E Thompson
- Department of Human Genetics, University of Chicago, Chicago, Ill
| | - Dagan A Loisel
- Department of Human Genetics, University of Chicago, Chicago, Ill
| | - Rebecca Anderson
- Department of Human Genetics, University of Chicago, Chicago, Ill
| | - Celeste Eng
- Department of Medicine, University of California, San Francisco, Calif
| | | | - Melody Young
- Department of Pediatrics, University of Chicago, Chicago, Ill
| | | | | | | | | | - L Keoki Williams
- Center for Health Services Research and Department of Internal Medicine, Henry Ford Health System, Detroit, Mich
| | - Kathleen C Barnes
- Division of Allergy and Clinical Immunology, Department of Medicine, The Johns Hopkins University, Baltimore, Md
| | - Esteban G Burchard
- Department of Medicine, University of California, San Francisco, Calif; Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, Calif
| | - Dan L Nicolae
- Department of Human Genetics, University of Chicago, Chicago, Ill; Department of Pediatrics, University of Chicago, Chicago, Ill; Department of Statistics, University of Chicago, Chicago, Ill
| | - Mark Abney
- Department of Human Genetics, University of Chicago, Chicago, Ill
| | - Carole Ober
- Department of Human Genetics, University of Chicago, Chicago, Ill.
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Hallberg J, Iliadou A, Anderson M, de Verdier MG, Nihlén U, Dahlbäck M, Pedersen NL, Higenbottam T, Svartengren M. Genetic and environmental influence on lung function impairment in Swedish twins. Respir Res 2010; 11:92. [PMID: 20604964 PMCID: PMC2914039 DOI: 10.1186/1465-9921-11-92] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2010] [Accepted: 07/06/2010] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND The understanding of the influence of smoking and sex on lung function and symptoms is important for understanding diseases such as COPD. The influence of both genes and environment on lung function, smoking behaviour and the presence of respiratory symptoms has previously been demonstrated for each of these separately. Hence, smoking can influence lung function by co-varying not only as an environmental factor, but also by shared genetic pathways. Therefore, the objective was to evaluate heritability for different aspects of lung function, and to investigate how the estimates are affected by adjustments for smoking and respiratory symptoms. METHODS The current study is based on a selected sample of adult twins from the Swedish Twin Registry. Pairs were selected based on background data on smoking and respiratory symptoms collected by telephone interview. Lung function was measured as FEV1, VC and DLco. Pack years were quantified, and quantitative genetic analysis was performed on lung function data adjusting stepwise for sex, pack years and respiratory symptoms. RESULTS Fully adjusted heritability for VC was 59% and did not differ by sex, with smoking and symptoms explaining only a small part of the total variance. Heritabilities for FEV1 and DLco were sex specific. Fully adjusted estimates were 10 and 15% in men and 46% and 39% in women, respectively. Adjustment for smoking and respiratory symptoms altered the estimates differently in men and women. For FEV1 and DLco, the variance explained by smoking and symptoms was larger in men. Further, smoking and symptoms explained genetic variance in women, but was primarily associated with shared environmental effects in men. CONCLUSION Differences between men and women were found in how smoking and symptoms influence the variation in lung function. Pulmonary gas transfer variation related to the menstrual cycle has been shown before, and the findings regarding DLco in the present study indicates gender specific environmental susceptibility not shown before. As a consequence the results suggest that patients with lung diseases such as COPD could benefit from interventions that are sex specific.
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Affiliation(s)
- Jenny Hallberg
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
- Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden
- Department of Pediatrics, Sachs' Children's Hospital, Stockholm, Sweden
| | - Anastasia Iliadou
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Martin Anderson
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Physiology, Södersjukhuset, Stockholm, Sweden
| | | | - Ulf Nihlén
- AstraZeneca R&D, Lund, Sweden
- Department of Respiratory Medicine and Allergology, Lund University, Sweden
| | | | - Nancy L Pedersen
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Tim Higenbottam
- AstraZeneca R&D, Charnwood, UK
- Current address: Chiesi Farmaceutici S.p.A., Parma, Italy
| | - Magnus Svartengren
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
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Topic A, Juranic Z, Jelic S, Magazinovic IG. Polymorphism of alpha-1-antitrypsin in hematological malignancies. Genet Mol Biol 2009; 32:716-9. [PMID: 21637443 PMCID: PMC3036898 DOI: 10.1590/s1415-47572009005000085] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Accepted: 06/17/2009] [Indexed: 12/26/2022] Open
Abstract
Alpha-1-antitrypsin (AAT) or serine protease inhibitor A1 (SERPINA1) is an important serine protease inhibitor in humans. The main physiological role of AAT is to inhibit neutrophil elastase (NE) released from triggered neutrophils, with an additional lesser role in the defense against damage inflicted by other serine proteases, such as cathepsin G and proteinase 3. Although there is a reported association between AAT polymorphism and different types of cancer, this association with hematological malignancies (HM) is, as yet, unknown. We identified AAT phenotypes by isoelectric focusing (in the pH 4.2-4.9 range) in 151 serum samples from patients with HM (Hodgkins lymphomas, non-Hodgkins lymphomas and malignant monoclonal gammopathies). Healthy blood-donors constituted the control group (n = 272). The evaluated population of patients as well as the control group, were at Hardy-Weinberg equilibrium for the AAT gene (χ2 = 4.42, d.f.11, p = 0.96 and χ2 = 4.71, d.f.11, p = 0.97, respectively). There was no difference in the frequency of deficient AAT alleles (Pi Z and Pi S) between patients and control. However, we found a significantly higher frequency of PiM1M1 homozygote and PiM1 allele in HM patients than in control (for phenotype: f = 0.5166 and 0.4118 respectively, p = 0.037; for allele: f = 0.7020 and 0.6360 respectively, p = 0.05). In addition, PiM homozygotes in HM-patients were more numerous than in controls (59% and 48%, respectively, p = 0.044). PiM1 alleles and PiM1 homozygotes are both associated with hematological malignancies, although this is considered a functionally normal AAT variant.
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Affiliation(s)
- Aleksandra Topic
- Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade Serbia
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Postma DS, Meyers DA, Jongepier H, Howard TD, Koppelman GH, Bleecker ER. Genomewide screen for pulmonary function in 200 families ascertained for asthma. Am J Respir Crit Care Med 2005; 172:446-52. [PMID: 15901612 PMCID: PMC2718527 DOI: 10.1164/rccm.200407-864oc] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2004] [Accepted: 05/15/2005] [Indexed: 11/16/2022] Open
Abstract
Changes in pulmonary function are important in determining asthma outcome. Genetic factors may influence airway obstruction in asthma. We performed a genomewide screen in 200 families of probands objectively diagnosed with asthma in the 1960s to identify chromosomal regions related to changes in pre- and postbronchodilator lung function (FEV1, VC, and FEV1%VC) and assess influences of early-life smoke exposure. Smoking (pack-years), age, sex, and height were covariates in variance component analyses. Significant evidence for linkage of pre- and postbronchodilator FEV1%VC was obtained for chromosome 2q32 (LOD,4.9, increasing to 6.03 with additional fine-mapping markers, and 3.2, respectively). Linkage existed for chromosome 5q for pre- and postbronchodilator VC (likelihood of disease [LOD], 1.8 and 2.6, respectively). Results for pre- and postbronchodilator FEV1 were less significant (LOD, 1.5 and 1.6, chromosomes 11p and 10q, respectively). Results were not affected by passive smoke exposure. There is significant evidence for linkage of FEV1%VC to chromosome 2q32 in families of probands with asthma, 35 cM proximal from linkage previously observed in families of probands with early-onset chronic obstructive pulmonary disease. Thus, there may be multiple genes on chromosome 2q that are important in determining presence and degree of airflow limitation in families ascertained for obstructive airway disease.
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Affiliation(s)
- Dirkje S Postma
- Department of Pulmonology, University Hospital, Hanzeplein 3, 9731 GZ Groningen, The Netherlands.
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Gottlieb DJ, Wilk JB, Harmon M, Evans JC, Joost O, Levy D, O'Connor GT, Myers RH. Heritability of longitudinal change in lung function. The Framingham study. Am J Respir Crit Care Med 2001; 164:1655-9. [PMID: 11719305 DOI: 10.1164/ajrccm.164.9.2010122] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
There have been multiple reports of heritability of lung function in cross-sectional analysis, but no prior reports of heritability of rate of change in lung function. We examined heritability of rate of change of lung function in families participating in the Framingham Heart Study. Spirometric measures from two time points were used to calculate annualized rate of change in FEV(1), FVC, and FEV(1)/FVC ratio, adjusting for the effects of age, height, and weight using multiple linear regression models. Standardized residuals from these models were used as phenotypic variables in variance components analysis to assess effects of smoking and heritable factors on rate of change in lung function. Heritable factors explained a modest proportion of the population variance, with heritability estimates for change in FEV(1), FVC, and ratio of 0.05, 0.18, and 0.13, respectively. Restricting the analysis to subjects concordant for smoking status during the interval over which lung function was measured, the heritability estimates increased to 0.18, 0.39, and 0.14, respectively, among interim smokers. These data suggest that in middle-aged and older persons in the general population, genetic factors contribute modestly to the overall population variance in rate of lung function decline, and further suggest the importance of gene-environment interactions.
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Affiliation(s)
- D J Gottlieb
- Research Service, VA Boston Healthcare System, and Department of Medicine and Neurology, Boston University School of Medicine, Boston, Massachusetts, USA.
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Palmer LJ, Knuiman MW, Divitini ML, Burton PR, James AL, Bartholomew HC, Ryan G, Musk AW. Familial aggregation and heritability of adult lung function: results from the Busselton Health Study. Eur Respir J 2001; 17:696-702. [PMID: 11401066 DOI: 10.1183/09031936.01.17406960] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Decreased spirometric indices are characteristic of asthma and other respiratory diseases. The aim of this study was to investigate the genetic and environmental components of variance of forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) measured in adulthood in an Australian population-based sample of 468 Caucasian nuclear families. The inter-relationships of the genetic determinants of these traits with asthma and atopic rhinitis were also investigated. Serial cross-sectional studies were conducted in the town of Busselton in Western Australia between 1966 and 1981 and follow-up of previous attendees was undertaken in 1995. Data from each subject included in this study were from a single survey in adulthood (25-60 yrs of age) when the subject was as close to age 45 yrs as possible. Multivariate analysis suggested that FEV1 and FVC levels were associated with age, sex, height, tobacco smoke exposure, asthma and atopic rhinitis. After adjustment for relevant covariates, FEV1 levels had a narrow-sense heritability (h2N) of 38.9% (SE 9.1%). FVC levels had an h2N of 40.6% (SE 8.9%). Extended modelling demonstrated little overlap in the genetic determinants of asthma or atopic rhinitis and either FEV1 or FVC levels. The results of this study were consistent with the existence of important genetic determinants of adult lung function that are independent of asthma or other atopic disease, cigarette smoking, height, age or sex.
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Affiliation(s)
- L J Palmer
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
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Abstract
This review traces some of the developments in population physiology based on contributions to the Annals over the last 25 years. Two broad themes are evident, physiological systems variation and adaptation, and by way of introduction an historical perspective of their relationship within human ecology is explored. Studies of physical fitness and work capacity, and the efforts to create standardized field procedures make up a number of the early papers. Longitudinal studies have provided reliable reference standards for Westernized populations, but are virtually non-existent for primitive groups. The relative importance of phenotypic and genotypic variations in working capacity have yet to be clearly defined. The level of habitual activity during childhood contributes to the development of ventilatory capacity though constitutional influences are of major importance. Variability in strength and motor performance of skeletal muscles are shown to have a direct bearing on aspects of growth, development and biological maturation. Physical and psychological stress in communities have been investigated. These and other studies contribute valuable data on the issue of stress, hypertension and cardiovascular morbidity and mortality. On the theme of human adaptability, high altitude populations, variations in thermal tolerance and adaptations in ageing populations have all received recent investigation. Highland people of all ages have considerably larger lung volumes than coastal dwellers. Haematological, biochemical and pulmonary function show adaptive phenomena that vary in different highland groups. In the tropical biome, more recent work includes the functional consequences of malnutrition, ethnic and cultural differences in work capacity, and the effects of endemic disease on physical performance. Annals of Human Biology papers have more recently contributed to investigations on morphological and physiological changes with human ageing. Though there is a decline in the ability to adapt to environmental stresses with age this may be met by changes in adaptational strategy in physiological systems.
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Affiliation(s)
- K J Collins
- Centre for Geriatric Medicine, University College Hospitals, London, UK
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Matsuse T, Fukuchi Y, Matsui H, Sudo E, Nagase T, Orimo H. Effect of cigarette smoking on pulmonary function in each phenotype M of alpha-1-protease inhibitor. Chest 1995; 107:395-400. [PMID: 7842767 DOI: 10.1378/chest.107.2.395] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Human alpha-1-protease inhibitor (alpha-1-Pi) has been known to be a highly polymorphic protein. We hypothesized that antiprotease activity of each phenotype M of alpha 1-protease inhibitor (PiM) might be different among smokers and that a variation of decrease in pulmonary function for a given amount of cigarette smoking might be associated with PiM phenotypes. To test this, we investigated the effect of cigarette smoking on pulmonary function in each PiM phenotype. The serum level of alpha 1-Pi was measured by the turbidimetric immunoassay and the distribution of PiM phenotypes was determined using isoelectric focusing technique in 247 healthy subjects and 20 COPD patients. Serum levels of alpha-1-antitrypsin of healthy and COPD subjects were 205.1 +/- 31.1 and 179.2 +/- 44.4 (+/- SD) mg/dL, respectively (p > 0.01). The frequency of each PiM phenotype in healthy subjects was shown as follows: M1, 0.555; M1M2, 0.328; M2, 0.041; M1M3, 0.057; M2M3, 0.016; M3, 0.004. The difference in the distribution of PiM phenotypes between healthy and COPD subjects was not significant. Single- and multiple-regression analyses showed that the ratio of FEV1 to forced vital capacity (FVC), in which FEV1 is expressed as percentage of FVC, the maximum flow rate at 50% of FVC divided by measured body height (V50/Ht), and the maximum flow rate at 25% of FVC divided by body height (V25/Ht) were closely related to age and that V25/Ht also was related to smoking index. However, PiM phenotype was unrelated to those pulmonary function variables. We conclude that PiM phenotype is not a major determinant of difference in magnitude of pulmonary impairments caused by cigarette smoking in each individual.
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Affiliation(s)
- T Matsuse
- Department of Geriatrics, Faculty of Medicine, University of Tokyo, Japan
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Duffy DL, Martin NG. Inferring the direction of causation in cross-sectional twin data: theoretical and empirical considerations. Genet Epidemiol 1994; 11:483-502. [PMID: 7713391 DOI: 10.1002/gepi.1370110606] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A recent multivariate extension of the classical twin study in theory allows the inference of the direction of causation between correlated traits solely using cross-sectional data. In this paper we briefly review this model and assess its usefulness by applying it to a number of pairs of biological and psychological variables between which the nature of the causative relationship is already known. We conclude that the method has a number of biases and limitations. If a causative relationship at the phenotypic level exists between two traits, the correct direction of causation is usually identifiable, providing the reliability and validity of the measures are known. Failure to correctly specify a measurement model can lead to incorrect tests of hypotheses. Difficulties can also occur when discriminating between a direct causative relationship and a correlation due to common genetic or environmental determinants, but these occur in predictable situations. If these considerations are taken into account in interpretation of results, the true nature of the association between traits can often be correctly identified, or at least included in a subgroup of best fitting models.
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Affiliation(s)
- D L Duffy
- Genetic Epidemiology Laboratory, Queensland Institute of Medical Research, Australia
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Duffy DL, Mitchell CA. Lower respiratory tract symptoms in Queensland schoolchildren: risk factors for wheeze, cough and diminished ventilatory function. Thorax 1993; 48:1021-4. [PMID: 8256232 PMCID: PMC464820 DOI: 10.1136/thx.48.10.1021] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND The occurrence of respiratory symptoms and abnormal lung function in children is known to be influenced by genetic and many environmental factors. The association between specific respiratory symptoms in children of school age and their parents has been examined. METHODS Respiratory symptoms and ventilatory function were recorded for 4549 schoolchildren in Queensland, Australia. RESULTS The cumulative prevalence of wheezing was 23.1% of 8 year olds and 20.8% of 12 year olds, and the prevalence of wheezing within the previous 12 months was 13.9% and 10.5% respectively. A parental history of asthma or wheeze and hayfever was associated with wheeze in the child, but did not affect either the age of onset or frequency of episodes. A history of frequent cough in children who had never wheezed was associated with a parental history of frequent bronchitis, but less strongly with parental wheeze. These familial aggregations were not mediated by common exposure to cigarette smoke. Both a history of parental wheeze and maternal cigarette use were associated with a decrease in FEF25-75 in the child and these effects were additive. CONCLUSIONS The association of specific symptoms (wheeze and cough without wheeze) in parent and offspring is interpreted as evidence for different mechanisms of familial transmission, which may be genetic.
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Affiliation(s)
- D L Duffy
- Department of Medicine, University of Queensland, Princess Alexandra Hospital, Australia
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Martin NG, Perl J, Oakeshott JG, Gibson JB, Starmer GA, Wilks AV. A twin study of ethanol metabolism. Behav Genet 1985; 15:93-109. [PMID: 3838073 DOI: 10.1007/bf01065891] [Citation(s) in RCA: 95] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Oakeshott JG, Muir A, Clark P, Martin NG, Wilson SR, Whitfield JB. Effects of the protease inhibitor (Pi) polymorphism on alpha-1-antitrypsin concentration and elastase inhibitory capacity in human serum. Ann Hum Biol 1985; 12:149-60. [PMID: 3872620 DOI: 10.1080/03014468500007641] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The concentration of alpha-1-antitrypsin (AAT) and its elastase inhibitory capacity (EIC) have been investigated in vitro in sera from 1688 healthy Canberra blood donors typed for electrophoretic variants of the protease inhibitor (Pi) locus. Nine Pi alleles were recorded in the sample, of which M1 was found at a frequency of nearly 70% and the other eight were each at frequencies below 15%. As a class, heterozygotes among the three Pi M subtype alleles, M1, M2 and M3, have higher means and lower variances for AAT and EiC than do the three M subtype homozygotes. Among the three homozygotes M1M1 has highest AAT and EIC and among the heterozygotes dominance in M1M2 and M1M3 is towards or beyond the high M1M1 values. Of the six other Pi alleles recorded, two (F and G) have similar values to the M subtypes but the other four (I, N, S and Z) have lower values. The patterns of means and variances in AAT and EIC for the different M subtype genotypes do not support the precise threshold function postulated by Martin and Oakeshott (1983) to relate activity to Darwinian fitness. Nevertheless, several aspects of the results are consistent with a general positive relationship between activity and fitness.
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