Journal of Movement Disorders

Original Articles

The Effect of Blood Lipids, Type 2 Diabetes, and Body Mass Index on Parkinson’s Disease: A Korean Mendelian Randomization Study: Kye Won Park, Yun Su Hwang, Seung Hyun Lee, Sungyang Jo, Sun Ju Chung; J Mov Disord. 2023;16(1):79-85. Published online January 12, 2023; DOI: https://doi.org/10.14802/jmd.22175

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Objective
Associations between various metabolic conditions and Parkinson’s disease (PD) have been previously identified in epidemiological studies. We aimed to investigate the causal effect of lipid levels, type 2 diabetes mellitus (T2DM), and body mass index (BMI) on PD in a Korean population via Mendelian randomization (MR).
Methods
Two-sample MR analyses were performed with inverse-variance weighted (IVW), weighted median, and MR-Egger regression approaches. We identified genetic variants associated with lipid concentrations, T2DM, and BMI in publicly available summary statistics, which were either collected from genome-wide association studies (GWASs) or from meta-analyses of GWAS that targeted only Korean individuals or East Asian individuals, including Korean individuals. The outcome dataset was a GWAS on PD performed in a Korean population.
Results
From previous GWASs and meta-analyses, we selected single nucleotide polymorphisms as the instrumental variables. Variants associated with serum levels of low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and triglycerides, as well as with T2DM and BMI, were selected (n = 11, 19, 17, 89, and 9, respectively). There were no statistically significant causal associations observed between the five exposures and PD using either the IVW, weighted median, or MR-Egger methods (p-values of the IVW method: 0.332, 0.610, 0.634, 0.275, and 0.860, respectively).
Conclusion
This study does not support a clinically relevant causal effect of lipid levels, T2DM, and BMI on PD risk in a Korean population.

Citations

Citations to this article as recorded by

Genetic evidence for the liver-brain axis: lipid metabolism and neurodegenerative disease risk
Zeyu Wang, Zixiao Yin, Guangyong Sun, Dong Zhang, Jianguo Zhang
Lipids in Health and Disease.2025;[Epub] CrossRef
Causal effect of systemic lupus erythematosus on psychiatric disorders: A two-sample Mendelian randomization study
Hua Xue, Shuangjuan Liu, Li Zeng, Wenhui Fan
Journal of Affective Disorders.2024; 347: 422. CrossRef
Causal relationship between diabetes mellitus, glycemic traits and Parkinson’s disease: a multivariable mendelian randomization analysis
Qitong Wang, Benchi Cai, Lifan Zhong, Jitrawadee Intirach, Tao Chen
Diabetology & Metabolic Syndrome.2024;[Epub] CrossRef
Association of Body Mass Index and Parkinson Disease
Cloé Domenighetti, Pierre-Emmanuel Sugier, Ashwin Ashok Kumar Sreelatha, Claudia Schulte, Sandeep Grover, Berta Portugal, Pei-Chen Lee, Patrick May, Dheeraj Bobbili, Milena Radivojkov Blagojevic, Peter Lichtner, Andrew B. Singleton, Dena Hernandez, Connor
Neurology.2024;[Epub] CrossRef
Causal association between common rheumatic diseases and arrhythmia: a Mendelian randomization study
Yuchen Zhang, Ling Tang, Ke Zhang, Xinai Meng, Tian Liu, Yanjia Chen, Xingfu Huang
Frontiers in Cardiovascular Medicine.2024;[Epub] CrossRef
Unraveling the link: exploring the causal relationship between diabetes, multiple sclerosis, migraine, and Alzheimer’s disease through Mendelian randomization
Hua Xue, Li Zeng, Shuangjuan Liu
Frontiers in Neuroscience.2023;[Epub] CrossRef
Glycated hemoglobin A1c, cerebral small vessel disease burden, and disease severity in Parkinson's disease
Xinxin Ma, Shuhua Li, Fengzhi Liu, Yu Du, Haibo Chen, Wen Su
Annals of Clinical and Translational Neurology.2023; 10(12): 2276. CrossRef

Umami and Other Taste Perceptions in Patients With Parkinson’s Disease: Priya Jagota, Nattida Chotechuang, Chanawat Anan, Teeraparp Kitjawijit, Chanchai Boonla, Roongroj Bhidayasiri; J Mov Disord. 2022;15(2):115-123. Published online March 22, 2022; DOI: https://doi.org/10.14802/jmd.21058

8,534 View
261 Download
8 Web of Science
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Abstract PDF

Objective
Studies of taste perceptions in Parkinson’s disease (PD) patients have been controversial, and none of these studies have assessed umami taste. This study aimed to assess umami, along with the other 4 taste functions in PD patients.
Methods
Participants were tested for gustation using the modified filter paper disc method and olfaction using the modified Sniffin’ Stick-16 (mSS-16) test (only 14 culturally suitable items were used). A questionnaire evaluated patients’ subjective olfactory and gustatory dysfunction, taste preference, appetite, and food habits.
Results
A total of 105 PD patients and 101 age- and sex-matched controls were included. The body mass index (BMI) of PD patients was lower than that of controls (PD = 22.62, controls = 23.86, p = 0.028). The mSS-16 score was 10.7 for controls and 6.4 for PD patients (p < 0.001) (normal ≥ 9). Taste recognition thresholds (RTs) for sweet, salty, sour, bitter and umami tastes were significantly higher in PD, indicating poorer gustation. All taste RTs correlated with each other, except for umami. Most patients were unaware of their dysfunction. Patients preferred sweet, salty and umami tastes more than the controls. Dysgeusia of different tastes in patients was differentially associated with poorer discrimination of tastes, an inability to identify the dish and adding extra seasoning to food. BMI and mSS-16 scores showed no correlation in either patients or controls.
Conclusion
PD patients have dysgeusia for all five tastes, including umami, which affects their appetite and diet. Patients preferred sweet, salty and umami tastes. This information can help adjust patients’ diets to improve their nutritional status.

Citations

Citations to this article as recorded by

How do people with Parkinson’s disease perceive challenges in handling cutlery? – A mixed study
Aline Souza Pagnussat, Alexandre Severo do Pinho, Camila Pinto, Thainara Cruz da Rosa, Mariana Moscovich, Carine de Sousa Andrade, Yi-An Chen
Disability and Rehabilitation: Assistive Technology.2025; : 1. CrossRef
Chemosensory Impairments and Their Impact on Nutrition in Parkinson’s Disease: A Narrative Literature Review
Sonila Alia, Elisa Andrenelli, Alice Di Paolo, Valentina Membrino, Laura Mazzanti, Marianna Capecci, Arianna Vignini, Mara Fabri, Maria Gabriella Ceravolo
Nutrients.2025; 17(4): 671. CrossRef
Insights into salt perception and cognitive impairment among middle-aged and older adults: a scoping review
Azira Sazali, Suzana Shahar, Hasnah Haron, Nor Fadilah Rajab, Fatin Hanani Mazri, Theng Choon Ooi, Nurul Fatin Malek Rivan
BMC Public Health.2025;[Epub] CrossRef
The missing piece of the puzzle – The key role of the dietitian in the management of Parkinson's disease
Richelle Flanagan, Carley Rusch, Fiona E. Lithander, Indu Subramanian
Parkinsonism & Related Disorders.2024; 121: 106021. CrossRef
Body mass index in patients with Parkinson’s disease: a systematic review
Yinghui Li, Yumei Liu, Chuanning Du, Jun Wang
Journal of Neurophysiology.2024; 131(2): 311. CrossRef
Apnea behavior in early- and late-stage mouse models of Parkinson's disease: Cineradiographic analysis of spontaneous breathing, acute stress, and swallowing
Lorena Roberta de Souza Mendes Kawamura, Max Sarmet, Priscila Sales de Campos, Sachiko Takehara, Yasuhiro Kumei, Jorge Luis Lopes Zeredo
Respiratory Physiology & Neurobiology.2024; 323: 104239. CrossRef
Olfactory and Gustatory Function in Early-Stage Parkinson’s Disease: Implications for Cognitive Association
Jeongjae Lee, Young Eun Kim, Joong Seob Lee, Suk Yun Kang, Min Seung Kim, In Hee Kwak, Jaeseol Park, Jung Yeon Nam, Hyeo-il Ma
Journal of Movement Disorders.2024; 17(4): 450. CrossRef
Gustatory dysfunction is related to Parkinson's disease: A systematic review and meta‐analysis
Il‐Youp Kwak, Kyung Soo Kim, Hyun Jin Min
International Forum of Allergy & Rhinology.2023; 13(10): 1949. CrossRef

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