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Cho SB. Importance of Longitudinal Data on Emerging Adulthood to Understand the Development of Alcohol use Problems and Methodological Consideration. KJYS 2022; 29:75-107. [DOI: 10.21509/kjys.2022.08.29.8.75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Cho SB, Smith RL, Bucholz K, Chan G, Edenberg HJ, Hesselbrock V, Kramer J, McCutcheon VV, Nurnberger J, Schuckit M, Zang Y, Dick DM, Salvatore JE. Using a developmental perspective to examine the moderating effects of marriage on heavy episodic drinking in a young adult sample enriched for risk. Dev Psychopathol 2021; 33:1097-1106. [PMID: 32611468 PMCID: PMC7775899 DOI: 10.1017/s0954579420000371] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Many studies demonstrate that marriage protects against risky alcohol use and moderates genetic influences on alcohol outcomes; however, previous work has not considered these effects from a developmental perspective or in high-risk individuals. These represent important gaps, as it cannot be assumed that marriage has uniform effects across development or in high-risk samples. We took a longitudinal developmental approach to examine whether marital status was associated with heavy episodic drinking (HED), and whether marital status moderated polygenic influences on HED. Our sample included 937 individuals (53.25% female) from the Collaborative Study on the Genetics of Alcoholism who reported their HED and marital status biennially between the ages of 21 and 25. Polygenic risk scores (PRS) were derived from a genome-wide association study of alcohol consumption. Marital status was not associated with HED; however, we observed pathogenic gene-by-environment effects that changed across young adulthood. Among those who married young (age 21), individuals with higher PRS reported more HED; however, these effects decayed over time. The same pattern was found in supplementary analyses using parental history of alcohol use disorder as the index of genetic liability. Our findings indicate that early marriage may exacerbate risk for those with higher polygenic load.
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Affiliation(s)
- Seung Bin Cho
- Department of Psychology, Pusan National University, Busan, South Korea
- Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
| | - Rebecca L Smith
- Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
| | - Kathleen Bucholz
- Department of Psychiatry, Washington University in St. Louis, St. Louis, MO, USA
| | - Grace Chan
- Department of Psychiatry, University of Connecticut School of Medicine, Farmington, CT, USA
| | - Howard J Edenberg
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Victor Hesselbrock
- Department of Psychiatry, University of Connecticut School of Medicine, Farmington, CT, USA
| | - John Kramer
- Department of Psychiatry, University of Iowa, Iowa City, IA, USA
| | - Vivia V McCutcheon
- Department of Psychiatry, Washington University in St. Louis, St. Louis, MO, USA
| | - John Nurnberger
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Marc Schuckit
- Department of Psychiatry, University of California-San Diego, La Jolla, CA, USA
| | - Yong Zang
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Danielle M Dick
- Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Jessica E Salvatore
- Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
- Virginia Institute for Psychiatric and Behavioral Genetics, Richmond, VA, USA
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Kim SJ, Zhang X, Cho SB, Kim CH, Park HC, Moon SJ. Uremic solutes of indoxyl sulfate and p-cresol enhance protease-activated receptor-2 expression in vitro and in vivo in keratinocytes. Hum Exp Toxicol 2020; 40:113-123. [PMID: 32757783 DOI: 10.1177/0960327120945758] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Uremic pruritus is common in patients with chronic kidney disease (CKD). The retention of uremic solutes is thought to be associated with uremic pruritus. Meanwhile, activation of protease-activated receptor-2 (PAR-2) has been suggested to play an important role in pruritus. The present study was performed to investigate the effects of uremic solutes on the expression of PAR-2 in the skin. METHODS Indoxyl sulfate (IS), p-cresol (PC), and uremic sera from CKD patients were used to stimulate PAR-2 expression in normal human epidermal keratinocytes (NHEKs). Also, NHEKs were additionally pretreated with soybean trypsin inhibitor to evaluate its inhibitory effect on PAR-2 expression. Patterns of cutaneous PAR-2 expression were investigated in skin samples from five CKD patients and CKD mice. RESULTS In NHEKs, IS, PC, and sera from CKD patients significantly induced PAR-2 mRNA and protein expression. Soybean trypsin inhibitor significantly decreased PAR-2 mRNA and protein expression in NHEKs treated with IS, PC, and CKD sera. NHEKs treated with IS and PC exhibited significant increases in protease activity. Skin from both CKD patients and mice exhibited marked upregulation of PAR-2 expression compared to control skin. CONCLUSIONS Results from the present study suggest that uremic solutes either directly or indirectly affect PAR-2 expression in the skin of CKD subjects, potentially playing an important role in the pathogenesis of uremic pruritus.
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Affiliation(s)
- S J Kim
- Department of Internal Medicine, Institute for Translational & Clinical Research, 395886International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea.,The Graduate School, 37991Yonsei University, Seoul, Korea
| | - X Zhang
- Department of Dermatology, 159436Yanbian University Hospital, Yanji, China.,Department of Pathology, 159436Yanbian University Hospital, Yanji, China.,Department of Dermatology and Cutaneous Biology Research Institute, 37991Yonsei University College of Medicine, Seoul, Korea
| | - S B Cho
- Department of Dermatology and Cutaneous Biology Research Institute, 37991Yonsei University College of Medicine, Seoul, Korea
| | - C H Kim
- Department of Internal Medicine, Institute for Translational & Clinical Research, 395886International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - H C Park
- Department of Internal Medicine, 65655Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - S J Moon
- Department of Internal Medicine, Institute for Translational & Clinical Research, 395886International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
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Cho SB, Su J, Kuo SIC, Bucholz KK, Chan G, Edenberg HJ, McCutcheon VV, Schuckit MA, Kramer JR, Dick DM. Positive and negative reinforcement are differentially associated with alcohol consumption as a function of alcohol dependence. Psychol Addict Behav 2019; 33:58-68. [PMID: 30667237 DOI: 10.1037/adb0000436] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A multistage model of drug addiction in which individuals' motivations for use change as they develop problems is widely accepted; however, the evidence for this model comes mostly from animal work and cross-sectional studies. We used longitudinal data to test whether positive and negative reinforcement associated with alcohol consumption differed as a function of alcohol dependence (AD). Specifically, we tested whether (a) positive reinforcement is more strongly associated with alcohol consumption than is negative reinforcement among individuals without AD, (b) negative reinforcement is more strongly associated with AD than is positive reinforcement, and (c) in the presence of AD, the association between positive reinforcement and alcohol consumption becomes weaker, whereas the association with negative reinforcement becomes stronger. We included assessments between Ages 18 and 30 years from participants who indicated they ever had a drink (N = 2,556; 51.6% female) from the Collaborative Study on the Genetics of Alcoholism Prospective Study. Results from generalized estimating equations indicated that positive, but not negative, reinforcement was associated with alcohol consumption among individuals without AD. Both positive and negative reinforcement were associated with AD, but the association was stronger with negative reinforcement. Results from the multilevel growth model indicated that the association between negative reinforcement and alcohol consumption became stronger with the presence of AD, whereas the association between positive reinforcement and alcohol consumption did not differ as a function of AD. We provide empirical evidence that positive and negative reinforcement are differentially associated with alcohol consumption as a function of AD. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
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Affiliation(s)
- Seung Bin Cho
- Department of Psychology, Virginia Commonwealth University
| | - Jinni Su
- Department of Psychology, Virginia Commonwealth University
| | | | | | - Grace Chan
- Department of Psychiatry, University of Connecticut
| | - Howard J Edenberg
- Department of Biochemistry and Molecular Biology, Indiana University
| | | | - Marc A Schuckit
- Department of Psychiatry, University of California at San Diego
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Cho SB, Baek HJ, Ryu KH, Choi BH, Moon JI, Kim TB, Kim SK, Park H, Hwang MJ. Clinical Feasibility of Zero TE Skull MRI in Patients with Head Trauma in Comparison with CT: A Single-Center Study. AJNR Am J Neuroradiol 2019; 40:109-115. [PMID: 30545839 DOI: 10.3174/ajnr.a5916] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 11/01/2018] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Conventional MR imaging techniques cannot produce optimal images of bone structures because bone has little water and a very short T2 life span. The aim of this study was to investigate the clinical feasibility of skull MR imaging using the zero TE sequence in patients with head trauma by assessing its diagnostic image quality and quantitative measurement compared with CT images. MATERIALS AND METHODS Thirteen enrolled patients with head trauma were assessed using brain CT and skull MR imaging. Image quality was graded on a 5-point Likert scale to compare the 2 modalities. To evaluate quantitative analyses between the 2 imaging modalities, we measured skull thickness and normalized bone tissue signal. Interobserver reliability was assessed using weighted κ statistics and the intraclass correlation coefficient. RESULTS Both imaging techniques clearly depicted skull fractures in all 13 patients. The mean scores for skull MR imaging and CT were 4.65 ± 0.56 and 4.73 ± 0.45 (P = .157), respectively, with substantial interobserver agreement (P < .05). The 2 imaging modalities showed no difference in skull thickness (P = .092) and had good correlation (r 2 = 0.997). The mean value of normalized bone tissue signal among the 3 layers of the skull was relatively consistent (P = .401) with high interobserver agreement (P < .001). CONCLUSIONS Zero TE skull MR imaging has diagnostic image quality comparable with that of CT images. It also provides consistent results on the quantitative measurement of cortical bone with CT images.
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Affiliation(s)
- S B Cho
- From the Departments of Radiology (S.B.C., H.J.B., K.H.R., B.H.C., J.I.M., T.B.K.)
| | - H J Baek
- From the Departments of Radiology (S.B.C., H.J.B., K.H.R., B.H.C., J.I.M., T.B.K.)
| | - K H Ryu
- From the Departments of Radiology (S.B.C., H.J.B., K.H.R., B.H.C., J.I.M., T.B.K.)
| | - B H Choi
- From the Departments of Radiology (S.B.C., H.J.B., K.H.R., B.H.C., J.I.M., T.B.K.)
| | - J I Moon
- From the Departments of Radiology (S.B.C., H.J.B., K.H.R., B.H.C., J.I.M., T.B.K.)
| | - T B Kim
- From the Departments of Radiology (S.B.C., H.J.B., K.H.R., B.H.C., J.I.M., T.B.K.)
| | - S K Kim
- Neurosurgery (S.K.K., H.P.), Gyeongsang National University Changwon Hospital, Gyeongsang National University School of Medicine, Changwon, Republic of Korea
| | - H Park
- Neurosurgery (S.K.K., H.P.), Gyeongsang National University Changwon Hospital, Gyeongsang National University School of Medicine, Changwon, Republic of Korea
| | - M J Hwang
- MR Applications and Workflow (M.J.H.), GE Healthcare Korea, Seoul, Republic of Korea
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Cho SB. Decomposing individual and group differences of categorical variables with genetic factor model.. [DOI: 10.32469/10355/4926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Cho SB. A longitudinal behavior genetic model for ordered categorical variables.. [DOI: 10.32469/10355/14198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Cho SB, Park J, Zheng Z, Yoo KH, Kim H. Split-axilla comparison study of 0.5-MHz, invasive, bipolar radiofrequency treatment using insulated microneedle electrodes for primary axillary hyperhidrosis. Skin Res Technol 2018; 25:30-39. [PMID: 29790612 DOI: 10.1111/srt.12591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2018] [Indexed: 02/05/2023]
Abstract
BACKGROUND Energy-delivering devices can be used to induce thermal coagulation of the eccrine sweat glands for treating primary axillary hyperhidrosis (PAH). OBJECTIVE The objective of this study was to compare the efficacy and safety of invasive, bipolar radiofrequency (RF) treatment for PAH. METHODS A split-axilla study was performed to compare the clinical outcomes of 0.5 MHz, invasive, bipolar RF treatment with treatment settings of a longer conduction time and lower power (LC/LP) vs a shorter conduction time and higher power (SC/HP) for treating PAH. RESULTS The in vivo study revealed median hyperhidrosis disease severity scale scores of 1.5 (interquartile range [IQR], 1-2) at 1 month and 1 (IQR, 1-2) at 3 months after treatment with the LC/LP setting, compared to baseline. Meanwhile, the other side of the axillae treated with the SC/HP setting showed scores of 2 (IQR, 2-2) at 1 month and 2 (IQR, 1.25-2) at 3 months. Analysis via a linear mixed model revealed a significant interaction (group, P = .011; time, P < .001; and group × time, P = .048) between treatment group and time. CONCLUSION PAH can be effectively and safely treated with invasive, multilayered, multiple-pass, 0.5-MHz, bipolar RF treatment, particularly with LC/LP.
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Affiliation(s)
- S B Cho
- Department of Dermatology and Cutaneous Biology Research Center, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.,Kangskin Dermatology Clinic, Seoul, Korea
| | - J Park
- Department of Dermatology and Cutaneous Biology Research Center, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
| | - Z Zheng
- Department of Dermatology and Cutaneous Biology Research Center, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.,Department of Dermatology, Yanbian University Hospital, Yanji, China
| | - K H Yoo
- Department of Dermatology and Cutaneous Biology Research Center, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
| | - H Kim
- Department of Dermatology and Cutaneous Biology Research Center, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
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Dick DM, Barr PB, Cho SB, Cooke ME, Kuo SIC, Lewis TJ, Neale Z, Salvatore JE, Savage J, Su J. Post-GWAS in Psychiatric Genetics: A Developmental Perspective on the "Other" Next Steps. Genes Brain Behav 2018; 17:e12447. [PMID: 29227573 PMCID: PMC5876087 DOI: 10.1111/gbb.12447] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 12/01/2017] [Accepted: 12/06/2017] [Indexed: 02/06/2023]
Abstract
As psychiatric genetics enters an era where gene identification is finally yielding robust, replicable genetic associations and polygenic risk scores, it is important to consider next steps and delineate how that knowledge will be applied to ultimately ameliorate suffering associated with substance use and psychiatric disorders. Much of the post-genome-wide association study discussion has focused on the potential of genetic information to elucidate the underlying biology and use this information for the development of more effective pharmaceutical treatments. In this review we focus on additional areas of research that should follow gene identification. By taking genetic findings into longitudinal, developmental studies, we can map the pathways by which genetic risk manifests across development, elucidating the early behavioral manifestations of risk, and studying how various environments and interventions moderate that risk across developmental stages. The delineation of risk across development will advance our understanding of mechanism, sex differences and risk and resilience processes in different racial/ethnic groups. Here, we review how the extant twin study literature can be used to guide these efforts. Together, these new lines of research will enable us to develop more informed, tailored prevention and intervention efforts.
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Affiliation(s)
- Danielle M. Dick
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | | | - Peter B. Barr
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | - Seung Bin Cho
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | - Megan E. Cooke
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | - Sally I-Chun Kuo
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | - Tenesha J. Lewis
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | - Zoe Neale
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | - Jessica E. Salvatore
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | - Jeanne Savage
- Department of Psychology, Developmental Program, Virginia Commonwealth University
| | - Jinni Su
- Department of Psychology, Developmental Program, Virginia Commonwealth University
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Abstract
OBJECTIVE The study of sex differences has been identified as one way to enhance scientific reproducibility, and the National Institutes of Health (NIH) have implemented a new policy to encourage the explicit examination of sex differences. Our goal here is to address sex differences in behavioral genetic research on alcohol outcomes. METHOD We review sex differences for alcohol outcomes and whether the source and magnitude of genetic influences on alcohol consumption and alcohol use disorder (AUD) are the same across sexes; describe common research designs for studying sex-specific gene-by-environment interaction (G × E) effects; and discuss the role of statistical power and theory when testing sex-specific genetic effects. RESULTS There are robust sex differences for many alcohol outcomes. The weight of evidence suggests that the source and magnitude of genetic influences on alcohol consumption and AUD are the same across sexes. Whether there are sex-specific G × E effects has received less attention to date. CONCLUSIONS The new NIH policy necessitates a systematic approach for studying sex-specific genetic effects in alcohol research. Researchers are encouraged to report power for tests of these effects and to use theory to develop testable hypotheses, especially for studies of G × E.
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Affiliation(s)
- Jessica E Salvatore
- Department of Psychology, Virginia Commonwealth University, Richmond, Virginia.,Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Seung Bin Cho
- Department of Psychology, Virginia Commonwealth University, Richmond, Virginia.,College Behavioral and Emotional Health Institute, Virginia Commonwealth University, Richmond, Virginia
| | - Danielle M Dick
- Department of Psychology, Virginia Commonwealth University, Richmond, Virginia.,College Behavioral and Emotional Health Institute, Virginia Commonwealth University, Richmond, Virginia.,Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
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Cho SB, Na J, Zheng Z, Lim JM, Kang JS, Lee JH, Lee SE. In vivo skin reactions from pulsed-type, bipolar, alternating current radiofrequency treatment using invasive noninsulated electrodes. Skin Res Technol 2018; 24:318-325. [PMID: 29368439 DOI: 10.1111/srt.12433] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/01/2018] [Indexed: 01/29/2023]
Abstract
BACKGROUND Bipolar, alternating current radiofrequency (RF) conduction using invasive noninsulated electrodes consecutively generates independent tissue coagulation around each electrode and then, the converged coagulation columns. METHODS Two pulsed-type RF models at the on-time pulse width/pulse pack of 30 and 40 milliseconds were designed to amplify the early stage of RF-induced tissue reaction using hairless mouse skin in vivo. Then, structural and ultrastructural changes were evaluated in hairless mouse skin samples at baseline and immediately 1 day, 3 days, 7 days, and 14 days after treatment. RESULTS Immediately after pulsed-RF treatment, a few chrysanthemum-like zones of electrothermal coagulation and hypereosinophilic collagen fibers were found in the dermis and dermo-subcutaneous fat junction. Histochemical staining for periodic acid-Schiff and immunohistochemical staining for type IV collagen revealed marked thickening of basement membranes. Transmission electron microscopy demonstrated that pulsed-RF treatment resulted in higher electron-dense and remarkably thicker lamina densa, as well as increases in anchoring fibrils, compared with untreated control specimens. Furthermore, CD31-positive blood vessels were smaller in size with a slit-like luminal appearance, without excessive damage to endothelial cells. CONCLUSION Our data indicated that pulse-type, bipolar RF energy induces structural and ultrastructural changes in basement membranes and vascular components in hairless mouse skin.
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Affiliation(s)
- S B Cho
- Department of Dermatology and Cutaneous Biology Research Center, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.,Kangskin Dermatology Clinic, Seoul, Korea
| | - J Na
- Department of Anatomy, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Z Zheng
- Department of Dermatology and Cutaneous Biology Research Center, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.,Department of Dermatology, Yanbian University Hospital, Yanji, China
| | - J M Lim
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - J-S Kang
- Kangskin Dermatology Clinic, Seoul, Korea
| | - J H Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - S E Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Cho SB, Aliev F, Clark SL, Adkins AE, Edenberg HJ, Bucholz KK, Porjesz B, Dick DM. Using Patterns of Genetic Association to Elucidate Shared Genetic Etiologies Across Psychiatric Disorders. Behav Genet 2017; 47:405-415. [PMID: 28343281 DOI: 10.1007/s10519-017-9844-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 03/09/2017] [Indexed: 11/28/2022]
Abstract
Twin studies indicate that latent genetic factors overlap across comorbid psychiatric disorders. In this study, we used a novel approach to elucidate shared genetic factors across psychiatric outcomes by clustering single nucleotide polymorphisms based on their genome-wide association patterns. We applied latent profile analysis (LPA) to p-values resulting from genome-wide association studies across three phenotypes: symptom counts of alcohol dependence (AD), antisocial personality disorder (ASP), and major depression (MD), using the European-American case-control genome-wide association study subsample of the collaborative study on the genetics of alcoholism (N = 1399). In the 3-class model, classes were characterized by overall low associations (85.6% of SNPs), relatively stronger association only with MD (6.8%), and stronger associations with AD and ASP but not with MD (7.6%), respectively. These results parallel the genetic factor structure identified in twin studies. The findings suggest that applying LPA to association results across multiple disorders may be a promising approach to identify the specific genetic etiologies underlying shared genetic variance.
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Affiliation(s)
- Seung Bin Cho
- Department of Psychology, Virginia Commonwealth University, PO Box 842018, 817W. Franklin Street, Richmond, VA, 23284-2018, USA. .,College Behavioral and Emotional Health Institute, Virginia Commonwealth University, Richmond, VA, USA.
| | - Fazil Aliev
- Department of Psychology, Virginia Commonwealth University, PO Box 842018, 817W. Franklin Street, Richmond, VA, 23284-2018, USA.,College Behavioral and Emotional Health Institute, Virginia Commonwealth University, Richmond, VA, USA.,Faculty of Business, Karabuk University, Karabuk, Turkey
| | - Shaunna L Clark
- Center for Biomarker Research and Precision Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Amy E Adkins
- Department of Psychology, Virginia Commonwealth University, PO Box 842018, 817W. Franklin Street, Richmond, VA, 23284-2018, USA.,College Behavioral and Emotional Health Institute, Virginia Commonwealth University, Richmond, VA, USA
| | - Howard J Edenberg
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Bernice Porjesz
- Department of Psychiatry and Behavioral Sciences, State University of New York Downstate Medical Center, Brooklyn, NY, USA
| | - Danielle M Dick
- Department of Psychology, Virginia Commonwealth University, PO Box 842018, 817W. Franklin Street, Richmond, VA, 23284-2018, USA.,College Behavioral and Emotional Health Institute, Virginia Commonwealth University, Richmond, VA, USA.,Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
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Homman LE, Edwards AC, Cho SB, Dick DM, Kendler KS. Gender and Direction of Effect of Alcohol Problems and Internalizing Symptoms in a Longitudinal Sample of College Students. Subst Use Misuse 2017; 52:429-438. [PMID: 27849409 PMCID: PMC5601307 DOI: 10.1080/10826084.2016.1233983] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Alcohol problems and internalizing symptoms are consistently found to be associated but how they relate to each other is unclear. OBJECTIVE The present study aimed to address limitations in the literature of comorbidity of alcohol problems and internalizing symptoms by investigating the direction of effect between the phenotypes and possible gender differences in college students. METHOD We utilized data from a large longitudinal study of college students from the United States (N = 2607). Three waves of questionnaire-based data were collected over the first two years of college (in 2011-2013). Cross-lagged models were applied to examine the possible direction of effect of internalizing symptoms and alcohol problems. Possible effects of gender were investigated using multigroup modeling. RESULTS There were significant correlations between alcohol problems and internalizing symptoms. A direction of effect was found between alcohol problems and internalizing symptoms but differed between genders. A unidirectional relationship varying with age was identified for males where alcohol problems initially predicted internalizing symptoms followed by internalizing symptoms predicting alcohol problems. For females, a unidirectional relationship existed wherein alcohol problems predicted internalizing symptoms. Conclusions/Importance: We conclude that the relationship between alcohol problems and internalizing symptoms is complex and differ between genders. In males, both phenotypes are predictive of each other, while in females the relationship is driven by alcohol problems. Importantly, our study examines a population-based sample, revealing that the observed relationships between alcohol problems and internalizing symptoms are not limited to individuals with clinically diagnosed mental health or substance use problems.
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Affiliation(s)
- Lina E. Homman
- Institute of Clinical Sciences, Block B. Queens University Belfast. Royal Victoria Hospital. Belfast, BT12 6BA, Northern Ireland, UK
| | - Alexis C. Edwards
- Virginia Institute for Psychiatric and Behavioral Genetics, Department of Psychiatry, Virginia Commonwealth University. PO Box 980126, Richmond, VA, USA, 23298-0126
| | - Seung Bin Cho
- Virginia Institute for Psychiatric and Behavioral Genetics, Department of Psychiatry, Virginia Commonwealth University. PO Box 980126, Richmond, VA, USA, 23298-0126
- Departments of Psychology and African American Studies, Virginia Commonwealth University, PO Box 842509, Richmond, VA 23284-2509
| | - Danielle M. Dick
- Departments of Psychology and African American Studies, Virginia Commonwealth University, PO Box 842509, Richmond, VA 23284-2509
| | - Kenneth S. Kendler
- Virginia Institute for Psychiatric and Behavioral Genetics, Department of Psychiatry, Virginia Commonwealth University. PO Box 980126, Richmond, VA, USA, 23298-0126
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Jung YS, Bae JM, Kim BJ, Kang JS, Cho SB. Periorbital melasma: Hierarchical cluster analysis of clinical features in Asian patients. Skin Res Technol 2017; 23:552-557. [PMID: 28317176 DOI: 10.1111/srt.12370] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2017] [Indexed: 02/03/2023]
Abstract
BACKGROUND Studies have shown melasma lesions to be distributed across the face in centrofacial, malar, and mandibular patterns. Meanwhile, however, melasma lesions of the periorbital area have yet to be thoroughly described. METHODS We analyzed normal and ultraviolet light-exposed photographs of patients with melasma. The periorbital melasma lesions were measured according to anatomical reference points and a hierarchical cluster analysis was performed. RESULTS The periorbital melasma lesions showed clinical features of fine and homogenous melasma pigmentation, involving both the upper and lower eyelids that extended to other anatomical sites with a darker and coarser appearance. The hierarchical cluster analysis indicated that patients with periorbital melasma can be categorized into two clusters according to the surface anatomy of the face. Significant differences between cluster 1 and cluster 2 were found in lateral distance and inferolateral distance, but not in medial distance and superior distance. Comparing the two clusters, patients in cluster 2 were found to be significantly older and more commonly accompanied by melasma lesions of the temple and medial cheek. CONCLUSION Our hierarchical cluster analysis of periorbital melasma lesions demonstrated that Asian patients with periorbital melasma can be categorized into two clusters according to the surface anatomy of the face.
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Affiliation(s)
- Y S Jung
- Department of Dermatology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
| | - J M Bae
- Department of Dermatology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
| | - B J Kim
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - J-S Kang
- Kangskin Dermatology Clinic, Seoul, Korea
| | - S B Cho
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea.,Kangskin Dermatology Clinic, Seoul, Korea.,Department of Dermatology, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
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15
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Salvatore JE, Thomas NS, Cho SB, Adkins A, Kendler KS, Dick DM. The role of romantic relationship status in pathways of risk for emerging adult alcohol use. Psychol Addict Behav 2017; 30:335-44. [PMID: 27214170 DOI: 10.1037/adb0000145] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Dating several people in emerging adulthood has been associated with higher alcohol use compared with being single or being in an exclusive relationship. As a follow-up to that report, we examined whether romantic relationship status is part of a pathway of risk between antecedent alcohol use risk factors and subsequent alcohol outcomes. Participants were 4,410 emerging adults assessed at 2 time-points during their first year of college. We found that a parental history of alcohol problems was indirectly related to dating several people via 2 modestly correlated pathways. The first pathway was through conduct problems. The second pathway was through positive urgency (i.e., a positive emotion-based predisposition to rash action). In turn, dating several people was associated with higher alcohol use. Our results suggest that these familial and individual-level alcohol risk factors are related to emerging adults' selection into subsequent romantic relationship experiences that are associated with higher alcohol use. These findings have implications for how romantic relationship experiences may fit into developmental models of the etiology of alcohol use. (PsycINFO Database Record
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Affiliation(s)
| | - Nathaniel S Thomas
- Institute for Drug and Alcohol Studies, Virginia Commonwealth University
| | - Seung Bin Cho
- Department of Psychology, Virginia Commonwealth University
| | - Amy Adkins
- Department of Psychology, Virginia Commonwealth University
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16
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Li JJ, Cho SB, Salvatore JE, Edenberg HJ, Agrawal A, Chorlian DB, Porjesz B, Hesselbrock V, Dick DM. The Impact of Peer Substance Use and Polygenic Risk on Trajectories of Heavy Episodic Drinking Across Adolescence and Emerging Adulthood. Alcohol Clin Exp Res 2017; 41:65-75. [PMID: 27991676 PMCID: PMC5205549 DOI: 10.1111/acer.13282] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/27/2016] [Indexed: 01/01/2023]
Abstract
BACKGROUND Heavy episodic drinking is developmentally normative among adolescents and young adults, but is linked to adverse consequences in later life, such as drug and alcohol dependence. Genetic and peer influences are robust predictors of heavy episodic drinking in youth, but little is known about the interplay between polygenic risk and peer influences as they impact developmental patterns of heavy episodic drinking. METHODS Data were from a multisite prospective study of alcohol use among adolescents and young adults with genome-wide association data (n = 412). Generalized linear mixed models were used to characterize the initial status and slopes of heavy episodic drinking between age 15 and 28. Polygenic risk scores (PRS) were derived from a separate genome-wide association study for alcohol dependence and examined for their interaction with substance use among the adolescents' closest friends in predicting the initial status and slopes of heavy episodic drinking. RESULTS Close friend substance use was a robust predictor of adolescent heavy episodic drinking, even after controlling for parental knowledge and peer substance use in the school. PRS were predictive of the initial status and early patterns of heavy episodic drinking in males, but not in females. No interaction was detected between PRS and close friend substance use for heavy episodic drinking trajectories in either males or females. CONCLUSIONS Although substance use among close friends and genetic influences play an important role in predicting heavy episodic drinking trajectories, particularly during the late adolescent to early adult years, we found no evidence of interaction between these influences after controlling for other social processes, such as parental knowledge and broader substance use among other peers outside of close friends. The use of longitudinal models and accounting for multiple social influences may be crucial for future studies focused on uncovering gene-environment interplay. Clinical implications are also discussed.
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Affiliation(s)
- James J. Li
- Department of Psychology and Waisman Center, University of Wisconsin-Madison, Madison, WI
| | - Seung Bin Cho
- Department of Psychology, Virginia Commonwealth University, Richmond, VA
| | - Jessica E. Salvatore
- Department of Psychology, Virginia Commonwealth University, Richmond, VA
- Virginia Institute for Psychiatric and Behavioral Genetics, Richmond, VA
| | - Howard J. Edenberg
- Departments of Biochemistry and Molecular Biology and Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN
| | - Arpana Agrawal
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO
| | - David B. Chorlian
- Department of Psychiatry, State University of New York, Health Science Center at Brooklyn, New York, USA
| | - Bernice Porjesz
- Department of Psychiatry, State University of New York, Health Science Center at Brooklyn, New York, USA
| | - Victor Hesselbrock
- Department of Psychiatry, University of Connecticut, Farmington, CT, USA
| | | | - Danielle M. Dick
- Department of Psychology, Virginia Commonwealth University, Richmond, VA
- Virginia Institute for Psychiatric and Behavioral Genetics, Richmond, VA
- Department of African-American Studies, Virginia Commonwealth University, Richmond, VA
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17
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Lee KW, Lee KC, Kim GH, Kim JH, Yeon JS, Cho SB, Chang BJ, Kim SK. EFFECTS OF DIETARY FERMENTED GARLIC ON THE GROWTH PERFORMANCE, RELATIVE ORGAN WEIGHTS, INTESTINAL MORPHOLOGY, CECAL MICROFLORA AND SERUM CHARACTERISTICS OF BROILER CHICKENS. Rev Bras Cienc Avic 2016. [DOI: 10.1590/1806-9061-2016-0242] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- KW Lee
- Konkuk University, Republic of Korea
| | - KC Lee
- Konkuk University, Republic of Korea
| | - GH Kim
- Konkuk University, Republic of Korea
| | - JH Kim
- Konkuk University, Republic of Korea
| | - JS Yeon
- Konkuk University, Republic of Korea
| | - SB Cho
- Konkuk University, Republic of Korea
| | - BJ Chang
- College of Veterinary Medicine, Republic of Korea
| | - SK Kim
- Konkuk University, Republic of Korea
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18
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Savage JE, Neale Z, Cho SB, Hancock L, Kalmijn JA, Smith TL, Schuckit MA, Donovan KK, Dick DM. Level of response to alcohol as a factor for targeted prevention in college students. Alcohol Clin Exp Res 2016; 39:2215-23. [PMID: 26503068 DOI: 10.1111/acer.12874] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 08/11/2015] [Indexed: 11/29/2022]
Abstract
BACKGROUND Heavy alcohol consumption and alcohol problems among college students are widespread and associated with negative outcomes for individuals and communities. Although current methods for prevention and intervention programming have some demonstrated efficacy, heavy drinking remains a problem. A previous pilot study and a recent large-scale evaluation (Schuckit et al., , ) found that a tailored prevention program based on a risk factor for heavy drinking, low level of response (low LR) to alcohol, was more effective at reducing heavy drinking than a state-of-the-art (SOTA) standard prevention program for individuals with the low LR risk factor. METHODS This study enrolled 231 first-semester college freshmen with either high or low LR into the same level of response-based (LRB) or SOTA online prevention programs as in the previous reports (consisting of 4 weeks of video modules), as well as a group of matched controls not receiving alcohol prevention, and compared changes in alcohol use between these groups across a 6-month period. RESULTS Individuals in alcohol prevention programs had a greater reduction in maximum drinks per occasion and alcohol use disorder symptoms than controls. There was limited evidence for interactions between LR and prevention group in predicting change in alcohol use behaviors; only among participants with strict adherence to the program was there an interaction between LR and program in predicting maximum drinks per occasion. However, overall, low LR individuals showed greater decreases in drinking behaviors, especially risky behaviors (e.g., maximum drinks, frequency of heavy drinking) than high LR individuals. CONCLUSIONS These results indicate that prevention programs, including brief and relatively inexpensive web-based programs, may be effective for persons at highest risk for heavier drinking, such as those with a low LR. Tailored programs may provide incremental benefits under some conditions. Long-term follow-ups and further investigations of tailored prevention programs based on other risk factors are needed.
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Affiliation(s)
- Jeanne E Savage
- Virginia Institute for Psychiatric and Behavioral Genetics , Virginia Commonwealth University, Richmond, Virginia
| | - Zoe Neale
- Virginia Institute for Psychiatric and Behavioral Genetics , Virginia Commonwealth University, Richmond, Virginia.,Department of Psychology , Virginia Commonwealth University, Richmond, Virginia
| | - Seung Bin Cho
- Virginia Institute for Psychiatric and Behavioral Genetics , Virginia Commonwealth University, Richmond, Virginia
| | - Linda Hancock
- Wellness Resource Center , Virginia Commonwealth University, Richmond, Virginia
| | - Jelger A Kalmijn
- Department of Psychiatry , University of California, San Diego, California
| | - Tom L Smith
- Department of Psychiatry , University of California, San Diego, California
| | - Marc A Schuckit
- Department of Psychiatry , University of California, San Diego, California
| | | | - Danielle M Dick
- Department of Psychology , Virginia Commonwealth University, Richmond, Virginia.,Departments of African American Studies and Human and Molecular Genetics , Virginia Commonwealth University, Richmond, Virginia
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Abstract
OBJECTIVE The purpose of this study was to assess patterns of tobacco use across the first year of college, transitions in use, and associated predictors. METHODS The frequency of tobacco use (cigarettes, cigars, smokeless tobacco, and hookah) during the fall and spring of 4073 college students' first year at college were used as indicators in latent class (LCA) and latent transition analyses (LTA). RESULTS The LCA yielded 3 classes that represent levels of use frequency and not specific tobacco product classes: non-using, experimenting, and frequent using. The LTA results demonstrate stability in class membership from fall to spring. The most common transition was for the fall experimenters to transition out of experimentation. A series of demographic, environmental, and intrapersonal predictors were found to influence both fall class membership, and transitions from fall to spring. CONCLUSIONS Students are likely to use multiple alternative tobacco products along with cigarettes. Their frequency of use of these products is fairly stable across the first year of college. Predictors reflecting experiences during the first year of college had the greatest impact on college tobacco use, demonstrating the importance of the college experience on young adult tobacco use.
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Affiliation(s)
- Megan E Cooke
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA, USA.
| | - Aashir Nasim
- Department of African American Studies, Virginia Commonwealth University, Richmond, VA, USA
| | - Seung Bin Cho
- College Behavioral and Emotional Health Initiative (COBE), Virginia Commonwealth University, Richmond, VA, USA
| | - Kenneth S Kendler
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Shaunna L Clark
- Center for Biomarker Research and Precision Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Danielle M Dick
- College Behavioral and Emotional Health Institute (COBE), Virginia Commonwealth University, Richmond, VA, USA
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20
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Berenz EC, Cho SB, Overstreet C, Kendler K, Amstadter AB, Dick DM. Longitudinal investigation of interpersonal trauma exposure and alcohol use trajectories. Addict Behav 2016; 53:67-73. [PMID: 26454552 DOI: 10.1016/j.addbeh.2015.09.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/17/2015] [Accepted: 09/23/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND The current longitudinal study examined associations between interpersonal potentially traumatic events (PTEs; i.e., sexual or physical assault) and changes in alcohol consumption among incoming college students. METHODS 1197 students (68% female) participating in a university-wide research study were included in analyses. Assessments were administered at three time-points and included measures of alcohol use, PTEs (Life Events Checklist), and a screener for possible PTSD symptoms (abbreviated Primary Care PTSD Screen). Linear growth curve models were fit to the three repeated measures of alcohol quantity and frequency to determine the role of pre-college and college-onset interpersonal PTEs and possible PTSD symptoms on patterns of alcohol use. RESULTS Pre-college interpersonal PTE was associated with greater baseline alcohol use for female but not male students. College-onset interpersonal PTE predicted greater alcohol use at concurrent and future assessments for women but not men, beyond the effects of pre-college PTE. Pre-college possible PTSD symptoms did not predict baseline or change in alcohol use. CONCLUSIONS There may be a stronger and longer-lasting impact of interpersonal PTE for college women compared to men on alcohol phenotypes, although replication in studies oversampling men endorsing interpersonal PTE is needed.
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Affiliation(s)
- Erin C Berenz
- Department of Pediatrics, University of Virginia, Charlottesville, VA, USA; Department of Psychiatry, Virginia Commonwealth University, Richmond, VA, USA.
| | - Seung Bin Cho
- Department of Psychiatry, Virginia Commonwealth University, Richmond, VA, USA
| | - Cassie Overstreet
- Department of Psychiatry, Virginia Commonwealth University, Richmond, VA, USA; Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
| | - Kenneth Kendler
- Department of Psychiatry, Virginia Commonwealth University, Richmond, VA, USA
| | - Ananda B Amstadter
- Department of Psychiatry, Virginia Commonwealth University, Richmond, VA, USA; Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
| | - Danielle M Dick
- Department of Psychiatry, Virginia Commonwealth University, Richmond, VA, USA; Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
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21
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Cho SB, Llaneza DC, Adkins AE, Cooke M, Kendler KS, Clark SL, Dick DM. Patterns of Substance Use Across the First Year of College and Associated Risk Factors. Front Psychiatry 2015; 6:152. [PMID: 26578984 PMCID: PMC4621385 DOI: 10.3389/fpsyt.2015.00152] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/09/2015] [Indexed: 11/24/2022] Open
Abstract
Starting college is a major life transition. This study aims to characterize patterns of substance use across a variety of substances across the first year of college and identify associated factors. We used data from the first cohort (N = 2056, 1240 females) of the "Spit for Science" sample, a study of incoming freshmen at a large urban university. Latent transition analysis was applied to alcohol, tobacco, cannabis, and other illicit drug uses measured at the beginning of the fall semester and midway through the spring semester. Covariates across multiple domains - including personality, drinking motivations and expectancy, high school delinquency, peer deviance, stressful events, and symptoms of depression and anxiety - were included to predict the patterns of substance use and transitions between patterns across the first year. At both the fall and spring semesters, we identified three subgroups of participants with patterns of substance use characterized as: (1) use of all four substances; (2) alcohol, tobacco, and cannabis use; and (3) overall low substance use. Patterns of substance use were highly stable across the first year of college: most students maintained their class membership from fall to spring, with just 7% of participants in the initial low substance users transitioning to spring alcohol, tobacco, and cannabis users. Most of the included covariates were predictive of the initial pattern of use, but covariates related to experiences across the first year of college were more predictive of the transition from the low to alcohol, tobacco, and cannabis user groups. Our results suggest that while there is an overall increase in alcohol use across all students, college students largely maintain their patterns of substance use across the first year. Risk factors experienced during the first year may be effective targets for preventing increases in substance use.
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Affiliation(s)
- Seung Bin Cho
- Department of African American Studies, Virginia Commonwealth University, Richmond, VA, USA
| | - Danielle C. Llaneza
- Department of African American Studies, Virginia Commonwealth University, Richmond, VA, USA
| | - Amy E. Adkins
- Department of African American Studies, Virginia Commonwealth University, Richmond, VA, USA
| | - Megan Cooke
- Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Kenneth S. Kendler
- Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Shaunna L. Clark
- Department of Pharmacotherapy and Outcome Science, Virginia Commonwealth University, Richmond, VA, USA
| | - Danielle M. Dick
- Department of African American Studies, Virginia Commonwealth University, Richmond, VA, USA
- Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
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22
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Kendler KS, Edwards A, Myers J, Cho SB, Adkins A, Dick D. The predictive power of family history measures of alcohol and drug problems and internalizing disorders in a college population. Am J Med Genet B Neuropsychiatr Genet 2015; 168B:337-46. [PMID: 25946510 PMCID: PMC4466079 DOI: 10.1002/ajmg.b.32320] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 04/15/2015] [Indexed: 11/10/2022]
Abstract
A family history (FH) of psychiatric and substance use problems is a potent risk factor for common internalizing and externalizing disorders. In a large web-based assessment of mental health in college students, we developed a brief set of screening questions for a FH of alcohol problems (AP), drug problems (DP) and depression-anxiety in four classes of relatives (father, mother, aunts/uncles/grandparents, and siblings) as reported by the student. Positive reports of a history of AP, DP, and depression-anxiety were substantially correlated within relatives. These FH measures predicted in the student, in an expected pattern, dimensions of personality and impulsivity, alcohol consumption and problems, smoking and nicotine dependence, use of illicit drugs, and symptoms of depression and anxiety. Using the mean score from the four classes of relatives was more predictive than using a familial/sporadic dichotomy. Interactions were seen between the FH of AP, DP, and depression-anxiety and peer deviance in predicting symptoms of alcohol and tobacco dependence. As the students aged, the FH of AP became a stronger predictor of alcohol problems. While we cannot directly assess the validity of these FH reports, the pattern of findings suggest that our brief screening items were able to assess, with some accuracy, the FH of substance misuse and internalizing psychiatric disorders in relatives. If correct, these measures can play an important role in the creation of developmental etiologic models for substance and internalizing psychiatric disorders which constitute one of the central goals of the overall project.
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Affiliation(s)
- Kenneth S Kendler
- Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Psychiatry, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Human and Molecular Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Correspondence to: Kenneth Kendler, MD, Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University Medical School, Box 980126, 800 E. Leigh Street, Room 1-123, Richmond, VA 23298-0126.
| | - Alexis Edwards
- Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Psychiatry, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - John Myers
- Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Psychiatry, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Seung Bin Cho
- Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Psychiatry, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Amy Adkins
- Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Psychiatry, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Danielle Dick
- Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Psychiatry, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Human and Molecular Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia
,Department of Psychology, Virginia Commonwealth University, Richmond, Virginia
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Han SY, Ryu KJ, Ahn KH, Cho SB, Lee CH, Hong SC. Conservative treatment of uterine fistula with abdominal abscess after caesarean section. J OBSTET GYNAECOL 2014; 35:650-1. [PMID: 25496617 DOI: 10.3109/01443615.2014.987115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- S Y Han
- a Department of Obstetrics and Gynecology , College of Medicine, Korea University , Seoul , Republic of Korea
| | - K J Ryu
- a Department of Obstetrics and Gynecology , College of Medicine, Korea University , Seoul , Republic of Korea
| | - K H Ahn
- a Department of Obstetrics and Gynecology , College of Medicine, Korea University , Seoul , Republic of Korea
| | - S B Cho
- b Department of Radiology , College of Medicine, Korea University , Seoul , Republic of Korea
| | - C H Lee
- c Department of Science , University of Manitoba , Winnipeg , MB , Canada
| | - S C Hong
- a Department of Obstetrics and Gynecology , College of Medicine, Korea University , Seoul , Republic of Korea
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Dick DM, Cho SB, Latendresse SJ, Aliev F, Nurnberger JI, Edenberg HJ, Schuckit M, Hesselbrock VM, Porjesz B, Bucholz K, Wang JC, Goate A, Kramer JR, Kuperman S. Genetic influences on alcohol use across stages of development: GABRA2 and longitudinal trajectories of drunkenness from adolescence to young adulthood. Addict Biol 2014; 19:1055-64. [PMID: 23692184 PMCID: PMC3783626 DOI: 10.1111/adb.12066] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Longitudinal analyses allow us to understand how genetic risk unfolds across development, in a way that is not possible with cross-sectional analyses of individuals at different ages. This has received little attention in genetic association analyses. In this study, we test for genetic effects of GABRA2, a gene previously associated with alcohol dependence, on trajectories of drunkenness from age 14 to 25. We use data from 1070 individuals who participated in the prospective sample of the Collaborative Study on the Genetics of Alcoholism, in order to better understand the unfolding of genetic risk across development. Piecewise linear growth models were fit to model the influence of genotype on rate of increase in drunkenness from early adolescence to young adulthood (14-18 years), the change in drunkenness during the transition to adulthood (18-19 years) and the rate of change in drunkenness across young adulthood (≥ 19 years). Variation in GABRA2 was associated with an increase in drunkenness that occurred at the transition between adolescence and adulthood. The genotypic effect was more pronounced in females. These analyses illustrate the importance of longitudinal data to characterize how genetic effects unfold across development. The findings suggest that transitions across important developmental periods may alter the relative importance of genetic effects on patterns of alcohol use. The findings also suggest the importance of considering gender when evaluating genetic effects on drinking patterns in males and females.
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Affiliation(s)
- Danielle M. Dick
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA
| | - Seung Bin Cho
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA
| | - Shawn J. Latendresse
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA
| | - Fazil Aliev
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA
| | | | | | - Marc Schuckit
- University of California, San Diego VA Medical Center, San Diego, CA
| | | | - Bernice Porjesz
- State University of New York (SUNY) Downstate Medical Center, Brooklyn, NY
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Edwards AC, Latendresse SJ, Heron J, Cho SB, Hickman M, Lewis G, Dick DM, Kendler KS. Childhood internalizing symptoms are negatively associated with early adolescent alcohol use. Alcohol Clin Exp Res 2014; 38:1680-8. [PMID: 24848214 DOI: 10.1111/acer.12402] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 02/04/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND The relationship between childhood internalizing problems and early adolescent alcohol use has been infrequently explored and remains unclear. METHODS We employed growth mixture modeling of internalizing symptoms for a large, population-based sample of U.K. children (the Avon Longitudinal Study of Parents and Children Cohort) to identify trajectories of childhood internalizing symptoms from age 4 through age 11.5. We then examined the relationship between membership in each trajectory and alcohol use in early adolescence (reported at age 13.8). RESULTS Overall, children experiencing elevated levels of internalizing symptoms were less likely to use alcohol in early adolescence. This finding held true across all internalizing trajectories; that is, those exhibiting increasing levels of internalizing symptoms over time, and those whose symptoms desisted over time, were both less likely to use alcohol than their peers who did not exhibit internalizing problems. CONCLUSIONS We conclude that childhood internalizing symptoms, unlike adolescent symptoms, are negatively associated with early adolescent alcohol experimentation. Additional studies are warranted to follow up on our preliminary evidence that symptoms of phobia and separation anxiety drive this effect.
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Affiliation(s)
- Alexis C Edwards
- Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, Virginia
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26
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Cho SB, Zheng Z, Ahn KJ, Choi MJ, Cho S, Kim DY, Lee HS, Bang D. Serum IgA reactivity against GroEL of Streptococcus sanguinis and human heterogeneous nuclear ribonucleoprotein A2/B1 in patients with Behçet disease. Br J Dermatol 2013; 168:977-83. [PMID: 23137016 DOI: 10.1111/bjd.12128] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Infectious agents, especially Streptococcus sanguinis and herpes simplex virus, have long been postulated as major triggering factors for Behçet disease (BD). OBJECTIVES To identify an anti-S. sanguinis antigen reacting with serum IgA antibody in patients with BD. METHODS We detected a target protein by proteomics analysis and evaluated serum IgA reactivity of 100 patients with BD against the identified streptococcal target protein and human heterogeneous nuclear ribonucleoprotein (hnRNP) A2/B1. Homologous epitope sequences between the streptococcal target protein and human hnRNP A2/B1 were also evaluated. RESULTS Four protein bands were detected by immunoprecipitation, and chaperonin GroEL was identified by a proteomics analysis. Reactivity of serum IgA against recombinant S. sanguinis GroEL was detected in 77 of 100 patients with BD (77%) and in 21 of 70 healthy controls (30%). In addition, reactivity of serum IgA against human recombinant hnRNP A2/B1 was seen in 79 of 100 patients with BD (79%) and in eight of 70 healthy controls (11%). Among the eight distinctive epitopes with significant homology between S. sanguinis GroEL and human hnRNP A2/B1, the serum IgA reactivity of patients with BD was markedly higher with epitope 3 (hnRNP A2/B1 peptide 33-46 and GroEL peptide 57-70) and epitope 6 (hnRNP A2/B1 peptide 177-188 and GroEL peptide 347-358). CONCLUSION We identified an S. sanguinis GroEL protein as a target of serum anti-S. sanguinis IgA antibody reactivity in patients with BD. In addition, patients with BD exhibited serum IgA reactivity against homologous epitope regions between S. sanguinis GroEL and human hnRNP A2/B1.
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Affiliation(s)
- S B Cho
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Kang WY, Sung DJ, Park BJ, Kim MJ, Han NY, Cho SB, Kang CH, Kang SH. Perihilar branching patterns of renal artery and extrarenal length of arterial branches and tumour-feeding arteries on multidetector CT angiography. Br J Radiol 2013; 86:20120387. [PMID: 23418206 DOI: 10.1259/bjr.20120387] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
OBJECTIVE The purpose of our study was to assess the extrarenal length of renal arterial branches and tumour-feeding arteries on multidetector CT (MDCT) angiography, in addition to the perihilar branching patterns, with relevance to segmental artery clamping. METHODS MDCT angiograms of 64 patients with renal masses <4 cm were retrospectively reviewed by 2 radiologists. The perihilar branching patterns of the single main renal artery were assessed according to the number of pre-segmental and segmental arteries. The extrarenal lengths of segmental plus pre-segmental arteries and the tumour-feeding arteries, measured on volume-rendered images, were compared according to the vascular segmentation and the tumour location, respectively. RESULTS In the 116 kidneys, 1 pre-segmental plus 5 segmental arteries (n=48) was the most common branching pattern. The mean extrarenal length of the inferior segmental plus pre-segmental arteries (33.05 mm) and the posterior segmental plus pre-segmental arteries (32.30 mm) was longer than any of the other segmental plus pre-segmental arteries (apical, 23.87 mm; superior, 26.80 mm; middle, 29.23 mm) (p<0.05). The mean extrarenal length of the lower pole tumour-feeding arteries (35.94 mm) was longer than those of the upper and mid-pole tumour-feeding arteries (24.95 mm, 29.62 mm), with significant difference between the lower and the upper pole tumour-feeding arteries (p<0.05). CONCLUSION Tumours in the lower pole, supplied by the inferior or posterior segmental artery, may be more amenable to segmental artery clamping. ADVANCES IN KNOWLEDGE MDCT angiography with volume rendering can demonstrate the extrarenal length of tumour-feeding arteries and may help in determining the accessibility for segmental artery clamping.
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Affiliation(s)
- W Y Kang
- Department of Radiology, Anam Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
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Cho SB, Zheng Z, Cho S, Ahn KJ, Choi MJ, Kim DY, Lee KH, Bang D. Both the sera of patients with Behçet's disease and Streptococcus sanguis stimulate membrane expression of hnRNP A2/B1 in endothelial cells. Scand J Rheumatol 2013; 42:241-6. [PMID: 23445441 DOI: 10.3109/03009742.2012.733728] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Heterogeneous nuclear ribonucleoprotein (hnRNP) A2/B1 has been identified as a target antigen of anti-endothelial cell immunglobulin (Ig)A antibodies in patients with Behçet's disease (BD). The aim was to investigate the effects of the sera from BD patients and Streptococcus sanguis on the subcellular expression of hnRNP A2/B1 in human dermal microvascular endothelial cells (HDMECs). METHOD The sera of BD patients and healthy controls (HC) as well as cultured S. sanguis were used to stimulate HDMECs. Subcellular fractions were obtained from stimulated HDMECs and were subjected to immunoblot analyses. The distribution of hnRNP A2/B1 was investigated by immunocytochemistry and direct immunofluorescence study was performed in biopsy specimens of mucosal ulcers from BD patients. RESULTS BD patients' sera increased the membrane expression of hnRNP A2/B1 in HDMECs after 12 and 24 h of incubation compared with HDMECs incubated with endothelial cell culture media and HC sera. S. sanguis also increased hnRNP A2/B1 in the cellular membrane. hnRNP A2/B1 mRNA level was also significantly upregulated in HDMECs incubated with BD patients' sera and S. sanguis. Immunocytochemistry demonstrated marked expression of hnRNP A2/B1 in the cytoplasm and cellular membrane of HDMECs incubated with BD patients' sera or S. sanguis. In addition, direct immunofluorescence experiments revealed the co-localization of serum IgA antibodies and monoclonal antibodies (mAbs) against hnRNP A2/B1 in tissue sections from ulcers of BD patients. CONCLUSIONS Our data indicate that both the sera of BD patients with active disease and S. sanguis infection are inflammatory stimuli that can induce membranous hnRNP A2/B1 expression in HDMECs.
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Affiliation(s)
- S B Cho
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Alam MJ, Mamuad LL, Kim SH, Jeong CD, Sung HG, Cho SB, Jeon CO, Lee K, Lee SS. Effect of Phytogenic Feed Additives in Soybean Meal on In vitro Swine Fermentation for Odor Reduction and Bacterial Community Comparison. Asian-Australas J Anim Sci 2013; 26:266-74. [PMID: 25049786 PMCID: PMC4093152 DOI: 10.5713/ajas.2012.12511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 11/21/2012] [Accepted: 11/05/2012] [Indexed: 01/10/2023]
Abstract
The effect of different phytogenic feed additives on reducing odorous compounds in swine was investigated using in vitro fermentation and analyzed their microbial communities. Soybean meal (1%) added with 0.1% different phytogenic feed additives (FA) were in vitro fermented using swine fecal slurries and anaerobically incubated for 12 and 24 h. The phytogenic FAs used were red ginseng barn powder (Panax ginseng C. A. Meyer, FA1), persimmon leaf powder (Diospyros virginiana L., FA2), ginkgo leaf powder (Ginkgo biloba L., FA3), and oregano lippia seed oil extract (Lippia graveolens Kunth, OL, FA4). Total gas production, pH, ammonia-nitrogen (NH3-N), hydrogen sulfide (H2S), nitrite-nitrogen (NO2−-N), nitrate-nitrogen (NO3−-N), sulfate (SO4−−), volatile fatty acids (VFA) and other metabolites concentration were determined. Microbial communities were also analyzed using 16S rRNA DGGE. Results showed that the pH values on all treatments increased as incubation time became longer except for FA4 where it decreased. Moreover, FA4 incubated for 12 and 24 h was not detected in NH3-N and H2S. Addition of FAs decreased (p<0.05) propionate production but increased (p<0.05) the total VFA production. Ten 16S rRNA DGGE bands were identified which ranged from 96 to 100% identity which were mostly isolated from the intestine. Similarity index showed three clearly different clusters: I (FA2 and FA3), II (Con and FA1), and III (FA4). Dominant bands which were identified closest to Eubacterium limosum (ATCC 8486T), Uncultured bacterium clone PF6641 and Streptococcus lutetiensis (CIP 106849T) were present only in the FA4 treatment group and were not found in other groups. FA4 had a different bacterial diversity compared to control and other treatments and thus explains having lowest odorous compounds. Addition of FA4 to an enriched protein feed source for growing swine may effectively reduce odorous compounds which are typically associated with swine production.
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Affiliation(s)
- M J Alam
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
| | - L L Mamuad
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
| | - S H Kim
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
| | - C D Jeong
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
| | - H G Sung
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
| | - S B Cho
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
| | - C O Jeon
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
| | - K Lee
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
| | - Sang S Lee
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742 Korea
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Cho SB, Han IK, Kim YY, Park SK, Hwang OH, Choi CW, Yang SH, Park KH, Choi DY, Yoo YH. Effect of lysine to digestible energy ratio on growth performance and carcass characteristics in finishing pigs. Asian-Australas J Anim Sci 2012; 25:1582-7. [PMID: 25049520 PMCID: PMC4093041 DOI: 10.5713/ajas.2012.12311] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 08/30/2012] [Accepted: 07/29/2012] [Indexed: 11/27/2022]
Abstract
This experiment was performed to investigate the effects of lysine (Lys) to DE ratio on growth performance, and carcass characterics in finishing barrows. Ninety six cross-bred finishing barrows ((Landrace×Yorkshire) ×Duroc, average BW 58.25±0.48 kg) were assigned as a randomized complete block design by 2 energy levels and 4 Lys:DE ratios on the basis of BW to one of 8 treatments with 3 replications with 4 animals per pen. The levels of DE and Lys:DE ratio for each treatment were i) DE 3.35 Mcal/kg, 1.5 g Lys/Mcal DE, ii) DE 3.35 Mcal/kg, 1.8 g Lys/Mcal DE, iii) DE 3.35 Mcal/kg, 2.1 g Lys/Mcal DE, iv) DE 3.35 Mcal/kg, 2.4 g Lys/Mcal DE, v) DE 3.60 Mcal/kg, 1.5 g Lys/Mcal DE, vi) DE 3.60 Mcal/kg, 1.8 g Lys/Mcal DE, vii) DE 3.60 Mcal/kg, 2.1 g Lys/Mcal DE, viii) DE 3.60 Mcal/kg, 2.4 g Lys/Mcal DE. During finishing period from 58 kg to 103 kg of BW, increased energy density in the diet increased (p<0.05) ADG and gain:feed ratio, but did not influence ADFI. As Lys:DE ratio was increased, ADG, ADFI and gain:feed ratio were improved in finishing barrows (p<0.05). There were positive interactions (p<0.05) between carcass weight, grade, and backfat thickness and energy density and Lys level (p<0.05). In conclusion, data from our current study suggest that maximum yields including ADG, gain:feed ratio, carcass weight and grade can be achieved by administrating finishing pigs with an ideal Lys:DE ratio, Lys 2.1 g/DE Mcal.
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Slutske WS, Cho SB, Piasecki TM, Martin NG. Genetic overlap between personality and risk for disordered gambling: evidence from a national community-based Australian twin study. J Abnorm Psychol 2012; 122:250-5. [PMID: 22985012 DOI: 10.1037/a0029999] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Using data from a large Australian twin sample we examined the extent to which genetic variation in the Big Three personality dimensions (positive emotionality, negative emotionality, and constraint) and their lower-order components explained genetic variation in the risk for disordered gambling (DG) among men and women. Genetic influences contributing to individual differences in normal-range personality traits explained over 40% of the genetic risk for DG, with a larger contribution among women than among men. The largest and most robust contributions came from the higher-order personality dimension of negative emotionality and its two lower-order dimensions of alienation and aggression. Surprisingly, low self-control was associated with the genetic risk for DG only among women, and risk-taking/sensation-seeking did not explain genetic risk for DG in either sex. The results of this study have implications for the causes of comorbidity between DG and other psychiatric disorders, the search for genes associated with DG risk, and the possibility of sex differences in the etiology of DG. Using a broad-band inventory of personality supports the conclusion that there probably is a substantial proportion of genetic variation in DG that cannot be explained by individual differences in personality.
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Affiliation(s)
- Wendy S Slutske
- Department of Psychology, University of Missouri, Columbia, MO 65211, USA.
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Abstract
BACKGROUND Behçet's disease (BD) and psoriasis are chronic inflammatory diseases characterized by multisystemic vasculitis and epidermal hyperplasia respectively. Although it has been found that the pathogenesis of BD and psoriasis share common perspectives, reports of patients who have both diseases in concurrence are rare. OBJECTIVES To analyse and evaluate the clinical manifestations of BD patients who have psoriasis together. METHODS Retrospective evaluation of the medical records of nine BD patients who were also diagnosed with psoriasis at the BD Specialty Clinic of Severance Hospital was carried out. We analysed the characteristics of patients and the clinical activity of both diseases, and also the effect of the treatment of one disease against the other. RESULTS Of the nine BD patients who also had psoriasis, male to female ratio was 1 : 2. Two (22.2%) patients had a complete type of BD and seven (77.8%) patients had an incomplete type of BD. For the psoriatic lesions, all nine (100%) patients were diagnosed as psoriasis vulgaris. Five (55.6%) patients had BD as the preceding disease and four (44.4%) patients had psoriasis as the preceding. All five patients who formerly developed BD followed by psoriasis had an active state of BD, but the activity of psoriasis of all nine patients was minimal to average. CONCLUSION In this study, we evaluated the clinical manifestations of nine patients who had BD and psoriasis together. Although the exact pathogenesis remains unclear, there might be some influence by each disease to the other between BD and psoriasis.
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Affiliation(s)
- S Cho
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Alam MJ, Jeong CD, Mamuad LL, Sung HG, Kim DW, Cho SB, Lee K, Jeon CO, Lee SS. Bacterial Community Dynamics during Swine In vitro Fermentation Using Starch as a Substrate with Different Feed Additives for Odor Reduction. Asian-Australas J Anim Sci 2012; 25:690-700. [PMID: 25049615 PMCID: PMC4093107 DOI: 10.5713/ajas.2011.11451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2011] [Revised: 03/28/2012] [Accepted: 02/14/2012] [Indexed: 11/27/2022]
Abstract
The experiment was conducted by in vitro fermentation and bacterial community analysis to investigate the reduction of odorous compounds in response to the use of feed additives (FA) during carbohydrate overload in growing pigs. Soluble starch at 1% (control) and various FA at 0.1% Ginseng meal (FA1); Persimmon leaf (FA2); Gingko nut (FA3) and Oregano lippia (FA4) were added to fecal slurry and incubated anaerobically for 12 and 24 h. In vitro parameters and microbial diversity of the dominant bacteria following fermentation were analyzed using Denaturing Gradient Gel Electrophoresis (DGGE), band cloning and sequencing of the V3 region. Results showed that total gas production increased with the advancement of incubation (p<0.05). pH values of FAs and control groups were decreased except the FA4 group which increased somewhat from 12 to 24 h (p<0.05). Ammonia nitrogen (NH3-N) and H2S gas concentrations were comparatively lower in both stages in FA4 treatment than in the other groups (p<0.05). Hence, NH3-N concentrations in liquid phases were increased (p<0.05) from 12 to 24 h, but the trend was lowest in FA4 than in the other groups at both stages. The total VFA production was comparatively lower and butyrate levels were moderate in FA4 group than in the the other groups during both stages (p<0.05). Indirect odor-reducing compounds such as NO2, NO3 and SO4 concentrations were higher in the FA4 and FA3 than in the other groups at 24 h (p<0.05). After fermentation, ten dominant bands appeared, six of which appeared in all samples and four in only the FA4 treated group. The total number of DGGE bands and diversity was higher in the FA4-group compared to other groups. Additionally, similarity indices were lowest (71%) in the FA4, which represented a different bacterial community compared with the other groups. These findings indicate that NH3-N, H2S and VFA production was minimal, and pH was also better in the FA4 group than in the other groups. Furthermore, the conversion of odor-reducing indirect compounds or their intermediates was higher in the FA4 group in compared to the other groups. FA4 group generated less odorous products and more indirect products by in vitro fermentation at 24 h, and their microbial pattern appeared to differ from that of the other groups. These findings suggest that this particular FA could change the microbial population, which may have a beneficial effect on odor reduction. It is recommended that the oregano lippia may be supplied to growing pigs as FA along with excess carbohydrate sources to reduce the production of odorous compounds.
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Affiliation(s)
- Md J Alam
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742, Korea ; Department of Animal Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh
| | - C D Jeong
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742, Korea
| | - L L Mamuad
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742, Korea
| | - H G Sung
- Adbiotech Co. Ltd., Chun-Cheon City 200-880, Korea
| | - D W Kim
- Swine Science Division, National Institute of Animal Science, RDA, Cheonan, 330-801, Korea
| | - S B Cho
- Animal Environment Division, National Institute of Animal Science, RDA, Suwon, 441-706, Korea
| | - K Lee
- Department of Animal Sciences, Ohio State University, 2029 Fyffe Road, Columbus, OH 43210, USA
| | - C O Jeon
- Department of Life Science, Chung-Ang University, Seoul, 156-756, Korea
| | - Sang S Lee
- Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Suncheon, Jeonnam 540-742, Korea
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Lee SJ, Roh MR, Lee SH, Chung WS, Lee JE, Oh SH, Cho SB. Topical niacin cream-assisted 595-nm pulsed-dye laser treatment for facial flushing: retrospective analysis of 25 Korean patients. J Eur Acad Dermatol Venereol 2011; 26:54-8. [PMID: 21366711 DOI: 10.1111/j.1468-3083.2011.04006.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Flushing is defined clinically as a transient reddening of the face and other areas. Due to the transient nature of flushing, a patient may not show signs of flushing during laser treatment. OBJECTIVE The aim of this study was to evaluate the efficacy and safety of 595-nm pulsed-dye laser treatment of flushing or erythema after provocation of flushing by topical niacin cream. METHODS We retrospectively reviewed a total of 25 Korean patients with facial flushing who were treated with three sessions of 595-nm pulsed-dye laser after the application of topical niacin cream. RESULTS Follow-up results revealed that 12 of the 25 patients demonstrated marked (51-75%) clinical improvement of baseline facial erythema. Eight patients had moderate (26-50%) improvement and three demonstrated near total (≥ 75%) improvement. Two patients showed minimal to no (0-25%) improvement. We observed that the reactivity to topical niacin cream was markedly reduced in 64% of our patients after 595-nm pulsed-dye laser treatments. Minimal post-therapy facial oedema was noted in most of the patients, which usually resolved spontaneously within 2 days. Pronounced facial swelling was observed in four patients. CONCLUSION We suggest that 595-nm pulsed-dye laser treatment after provocation of flushing by topical niacin cream may provide a new treatment algorithm for facial flushing in Asians.
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Affiliation(s)
- S J Lee
- Yonsei Star Skin & Laser Clinic, Yonsei University College of Medicine, Seoul, Korea
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Kim TG, Roh HJ, Cho SB, Lee JH, Lee SJ, Oh SH. Enhancing effect of pretreatment with topical niacin in the treatment of rosacea-associated erythema by 585-nm pulsed dye laser in Koreans: a randomized, prospective, split-face trial. Br J Dermatol 2011; 164:573-9. [PMID: 21143465 DOI: 10.1111/j.1365-2133.2010.10174.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Rosacea is a chronic dermatosis that is usually confined to the face. A pulsed dye laser (PDL) system has been proven to be effective in treating rosacea-associated erythema and telangiectasias. Niacin is a cutaneous vasodilator that can increase the chromophore through increased blood flow. OBJECTIVES We hypothesized that increased blood flow by pretreatment with topical niacin could enhance the effect of PDL in the treatment of rosacea. METHODS Eighteen Korean patients with rosacea were recruited. Three sessions of 585-nm PDL using a subpurpuragenic dose with and without pretreatment with niacin cream were performed on randomly assigned half-faces at 3-week intervals. Erythema was assessed objectively by a polarization colour imaging system, and evaluations were also made by three blinded dermatologists. Patient satisfaction was evaluated using a 10-point visual analogue scale. RESULTS Fifteen patients completed this study. All patients showed an improvement in erythema after three sessions of PDL treatment both with and without niacin pretreatment (P = 0·023 and P = 0·009, respectively). There was no significant difference in the improvement of objective erythema between the two sides. However, based on physician assessment the overall clinical improvement on the niacin side was significantly higher (P = 0·005), and patient satisfaction was also higher on the niacin-pretreated side (P = 0·007). There were no remarkable side-effects, with the exception of transient erythema and oedema. CONCLUSIONS Pretreatment with topical niacin safely enhanced the effect of 585-nm PDL treatment of rosacea-associated erythema in Koreans. Application of niacin can be helpful in overcoming the relatively lower effect of subpurpuragenic PDL in dark-skinned Asians.
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Affiliation(s)
- T G Kim
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Sinchon-Dong, Seodaemun-Gu, Seoul, Korea
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Cho SB, Kim JH, Cho S, Park JM, Park YK, Oh SH. Vitiligo in children and adolescents: association with thyroid dysfunction. J Eur Acad Dermatol Venereol 2010; 25:64-7. [DOI: 10.1111/j.1468-3083.2010.03694.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cho SB, Kim T, Cho S, Shim WH, Yang MS, Bang D. Major arterial aneurysms and pseudoaneurysms in Behçet's disease: results from a single centre. Scand J Rheumatol 2010; 40:64-7. [PMID: 20840016 DOI: 10.3109/03009742.2010.497161] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Behçet's disease (BD) with arterial involvement is closely correlated with mortality and morbidity due to life-threatening complications such as arterial occlusion and aneurysm rupture. We aimed to determine the clinical characteristics of BD patients with aneurysms and pseudoaneurysms in the major arterial systems. METHODS Medical records of 30 BD patients diagnosed with aneurysms or pseudoaneurysms in the major arterial systems were reviewed to determine the clinical characteristics of BD, the sites and types of arterial aneurysms or pseudoaneurysms, laboratory test results, and response to treatment. RESULTS A total of 47 aneurysms and pseudoaneurysms (32 saccular aneurysms, eight fusiform aneurysms, and seven pseudoaneurysms) were detected in 30 patients. Most aneurysms and pseudoaneurysms (27 patients, 90%) had not ruptured. Symptomatic lesions presented in 21 patients (70%), and asymptomatic lesions were incidentally detected in nine (30%). Ten of the 30 patients (33.3%) presented two or more aneurysmal lesions. Recurrence was observed in five patients (16.7%) after treatment with stent graft (n = 3), graft interposition (n = 1), or graft embolization (n = 1). CONCLUSION We suggest that BD patients diagnosed with major arterial aneurysms should be further evaluated to detect possible associated venous or arterial thrombosis formations or aneurysmal lesions at other sites.
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Affiliation(s)
- S B Cho
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Cho SB, Lee JH, Lee SH, Lee SJ, Bang D, Oh SH. Efficacy and safety of 1064-nm Q-switched Nd:YAG laser with low fluence for keloids and hypertrophic scars. J Eur Acad Dermatol Venereol 2010; 24:1070-4. [PMID: 20158584 DOI: 10.1111/j.1468-3083.2010.03593.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Several treatment modalities using laser devices have been used for the treatment of keloids and hypertrophic scars with various therapeutic outcomes. OBJECTIVE The purpose of this study was to describe the efficacy and safety of 1064-nm Q-switched (QS) Nd:YAG laser with low fluence on keloids and hypertrophic scars. METHODS Keloids and hypertrophic scars located at 21 anatomic sites in 12 Korean patients (10 men and 2 women; mean age 23.8 years, range 21-33) were treated using 1064-nm QS Nd:YAG laser with low fluence at 1-2 week intervals. Treatment settings were 1.8-2.2 J/cm(2), 7-mm spot size and 5-6 passes with appropriate overlapping. RESULTS Follow-up data collected 3 months after the final treatment revealed decreases in the mean score for the following lesion characteristics: pigmentation from 1.8 to 1.2; vascularity from 1.4 to 1.0; pliability from 3.0 to 2.0 and height from 2.3 to 1.8. The modified Vancouver General Hospital Burn Scar Assessment score decreased from 8.6 to 5.9 (P < 0.0001). Observed side-effects were a mild prickling sensation during treatment, and mild post-treatment erythema, both of which resolved within few hours. CONCLUSION Our results demonstrate that QS Nd:YAG laser with low fluence may be used for the treatment of keloids and hypertrophic scars.
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Affiliation(s)
- S B Cho
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Affiliation(s)
- S B Cho
- Department of Dermatology, Armed Forces Yangju Hospital, Yangju, Korea
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Cho SB, Lee SJ, Cho S, Oh SH, Chung WS, Kang JM, Kim YK, Kim DH. Non-ablative 1550-nm erbium-glass and ablative 10 600-nm carbon dioxide fractional lasers for acne scars: a randomized split-face study with blinded response evaluation. J Eur Acad Dermatol Venereol 2009; 24:921-5. [DOI: 10.1111/j.1468-3083.2009.03551.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cho SB, Park SJ, Kim JS, Kim MJ, Bu TS. Treatment of post-inflammatory hyperpigmentation using 1064-nm Q-switched Nd:YAG laser with low fluence: report of three cases. J Eur Acad Dermatol Venereol 2009; 23:1206-7. [DOI: 10.1111/j.1468-3083.2009.03123.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cho SB, Song BC, Lee SJ, Oh SH. Dental whitening using 532/ 1064-nm Q-switched Nd:YAG lasers. J Eur Acad Dermatol Venereol 2009; 23:1105-6. [DOI: 10.1111/j.1468-3083.2009.03107.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kim MJ, Kim JS, Cho SB. Punctate leucoderma after melasma treatment using 1064-nm Q-switched Nd:YAG laser with low pulse energy. J Eur Acad Dermatol Venereol 2009; 23:960-2. [DOI: 10.1111/j.1468-3083.2008.03070.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lee JH, Cho SB, Bang D, Oh SH, Ahn KJ, Kim J, Park YB, Lee SK, Lee KH. Human anti-alpha-enolase antibody in sera from patients with Behçet's disease and rheumatologic disorders. Clin Exp Rheumatol 2009; 27:S63-S66. [PMID: 19796536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE alpha-Enolase is a target antigen of IgM-type anti-endothelial cell antibody in patients with Behçet's disease (BD). The objective of this study was to assess the reactivity of serum anti-alpha-enolase antibodies in BD and in other rheumatologic diseases, and to evaluate the clinical significance of serum anti-alpha-enolase antibodies in BD. METHODS Enzyme-linked immunosorbent assay (ELISA) and immunoblotting were used to examine serum samples from patients with BD (n=100), systemic lupus erythematosus (SLE) (n=50), systemic sclerosis (n=21), rheumatoid arthritis (RA) (n=20), Takayasu's arteritis (n=20), dermatomyositis (n=17), mixed connective tissue disease (MCTD) (n=11), and samples from healthy volunteer donors (n=23). The medical records of patients with BD were reviewed to investigate their clinical characteristics. RESULTS Specific positive signals against recombinant human alpha-enolase were detected by IgM ELISA of serum samples from 56 of the 100 BD patients (56.0%), 24 of the 50 SLE patients (48.0%), 15 of the 21 systemic sclerosis patients (71.4%), 13 of the 20 RA patients (65.0%), 10 of the 20 Takayasu's arteritis patients (50.0%), 9 of the 17 dermatomyositis patients (52.9%), and 5 of the 11 MCTD patients (45.5%). The number of BD patients with vascular lesions was significantly higher in the anti-alpha-enolase antibody positive group than in the negative group (p=0.027). CONCLUSION We demonstrated the reactivities of serum anti-alpha-enolase antibodies in BD and other rheumatologic diseases with moderate specificity and also found that serum anti-alpha-enolase antibodies in BD can be associated with vascular system involvement.
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Affiliation(s)
- J H Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea.
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Cho SB, Park JM, Oh SH, Kim HS, Park YK. Atypical hyperpigmentation after acitretin and narrow-band ultraviolet B combination therapy. J Eur Acad Dermatol Venereol 2009; 23:356-7. [DOI: 10.1111/j.1468-3083.2008.02879.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cho SB, Lee SJ, Kang JM, Kim YK, Ryu DJ, Lee JH. Effective treatment of a injected hyaluronic acid-induced Tyndall effect with a 1064-nm Q-switched Nd:YAG laser. Clin Exp Dermatol 2009; 34:637-8. [PMID: 19236411 DOI: 10.1111/j.1365-2230.2008.03056.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cho SB, Wood PK, Heath AC. Decomposing group differences of latent means of ordered categorical variables within a genetic factor model. Behav Genet 2009; 39:101-22. [PMID: 19009342 PMCID: PMC3401167 DOI: 10.1007/s10519-008-9237-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2007] [Accepted: 10/11/2008] [Indexed: 11/25/2022]
Abstract
A genetic factor model is introduced for decomposition of group differences of the means of phenotypic behavior as well as individual differences when the research variables under consideration are ordered categorical. The model employs the general Genetic Factor Model proposed by Neale and Cardon (Methodology for genetic studies of twins and families, 1992) and, more specifically, the extension proposed by Dolan et al. (Behav Genet 22: 319-335, 1992) which enables decomposition of group differences of the means associated with genetic and environmental factors. Using a latent response variable (LRV) formulation (Muthén and Asparouhov, Latent variable analysis with categorical outcomes: multiple-group and growth modeling in Mplus. Mplus web notes: No. 4, Version 5, 2002), proportional differences of response categories between groups are modeled within the genetic factor model in terms of the distributional differences of latent response variables assumed to underlie the observed ordered categorical variables. Use of the proposed model is illustrated using a measure of conservatism in the data collected from the Australian Twin Registry.
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Affiliation(s)
- Seung Bin Cho
- Psychological Sciences, University of Missouri, 200 South 7th Street, Psychology Building, Columbia, MO 65211, USA.
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