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JMD : Journal of Movement Disorders



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Hair Loss: A Well-Known Yet Understudied Symptom in Parkinson’s Disease Patients During Dopaminergic Therapy
Jungyeun Lee, Hwa Jung Ryu, Soon Young Hwang, Seong-Beom Koh
J Mov Disord. 2024;17(1):47-54.   Published online September 26, 2023
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AbstractAbstract PDFSupplementary Material
Hair loss has been reported to occur during dopaminergic therapy in patients with Parkinson’s disease. The mechanism by which dopaminergic therapy induces hair loss is not well understood. Dopamine receptors are present in the hair follicle, where they regulate melanin production. However, the role of dopamine receptors in hair growth is still not well understood. This study aimed to evaluate the prevalence of hair loss and identify factors associated with complaints of hair loss in patients with Parkinson’s disease.
A cross-sectional design involving 495 Parkinson’s disease patients was applied to evaluate hair loss status. Patients completed a questionnaire, and scalp/hair examinations were performed. Patients with underlying conditions that could affect hair loss and those prescribed medications known to increase the risk of hair loss were excluded. Finally, 291 patients (58.8%) were included for analysis.
Among the 495 patients, 138 (27.9%) reported hair loss. Interestingly, more than half of the patients who complained of hair loss (79 out of 138) did not utilize treatments such as hair products, massage, dietary modifications, or alopecia medications. Hair inspection by a single investigator revealed objective hair loss in 263 patients (53.1%). An analysis of factors associated with hair loss complaints showed that the intake of dopaminergic medications with a levodopa-equivalent daily dose > 448 mg was associated with complaints of hair loss.
Dopaminergic medication is associated with hair loss complaints in Parkinson’s disease patients.
Constipation is Associated With Mild Cognitive Impairment in Patients With de novo Parkinson’s Disease
Sung Hoon Kang, Jungyeun Lee, Seong-Beom Koh
J Mov Disord. 2022;15(1):38-42.   Published online November 17, 2021
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  • 2 Web of Science
  • 3 Crossref
AbstractAbstract PDF
The association between gastrointestinal (GI) symptoms and cognitive profile in patients with Parkinson’s disease (PD) at diagnosis remains unclear, although GI symptoms and cognitive impairment are highly prevalent in patients with PD. We investigated the relationship between constipation and cognitive status. We also aimed to identify the correlation between constipation and each neuropsychological dysfunction.
A total of 427 patients with de novo Parkinson’s disease with normal cognition (PD-NC, n = 170) and Parkinson’s disease with mild cognitive impairment (PD-MCI, n = 257) at Korea University Guro Hospital in Seoul, Korea were included. All patients underwent comprehensive neuropsychological tests and completed the Non-Motor Symptoms Scale (NMSS). The frequency and severity of constipation were assessed using the NMSS GI symptoms scale, we used logistic regression analysis and partial correlation analysis to determine the associations between constipation score, MCI, and each neuropsychological dysfunction.
Frequent and severe constipation was associated with MCI in patients with PD at diagnosis regardless of disease severity. Specifically, constipation was related to poor performance in frontal-executive and visuospatial functions after controlling for age and sex.
Our findings may provide an understanding of constipation as a marker associated with cognitive impairment in individuals with PD. Therefore, the evaluation of cognitive function is warranted in PD patients with constipation, while further studies are necessary to investigate the detailed mechanism of our results.


Citations to this article as recorded by  
  • Defecation after magnesium supplementation enhances cognitive performance in triathletes
    Chen-Chan Wei, M. Brennan Harris, Mengxin Ye, Andrew Nicholls, Ahmad Alkhatib, Luthfia Dewi, Chi-Yang Huang, Chia-Hua Kuo
    Sports Medicine and Health Science.2024;[Epub]     CrossRef
  • Constipation in Parkinson's Disease
    Eamonn M. M. Quigley
    Seminars in Neurology.2023; 43(04): 562.     CrossRef
  • Interactions between gut microbiota and Parkinson's disease: The role of microbiota-derived amino acid metabolism
    Wang Wang, Shujun Jiang, Chengcheng Xu, Lili Tang, Yan Liang, Yang Zhao, Guoxue Zhu
    Frontiers in Aging Neuroscience.2022;[Epub]     CrossRef

JMD : Journal of Movement Disorders