{
  "abstract": "Introduction\n\nCognitive impairment is a common non-motor symptom of Parkinson's disease (PD) that markedly reduces patients' quality of life. Given the clinical heterogeneity of PD-related cognitive impairment (PDCI), further clarification of clinical and circulating biological factors associated with cognitive status may help improve our understanding of cognitive dysfunction in PD.Methods\n\nIn this cross-sectional study, 243 patients with PD and 90 age- and sex-matched healthy controls (HCs) were enrolled. Cognitive function was evaluated using the Montreal Cognitive Assessment (MoCA), and patients with PD were classified into the PD with cognitive impairment (PDCI) and PD without cognitive impairment (PDNCI) groups. Based on motor symptoms, PD patients were further divided into three subtypes: tremor-dominant (TD), postural instability and gait disorder (PIGD), and indeterminate subtype (IND). Group comparisons and logistic regression analyses were performed to examine factors associated with cognitive impairment.Results\n\nSerum irisin levels did not differ significantly between patients with PD and healthy controls (p = 0.478). Compared with PDNCI patients, those with PDCI had lower serum irisin levels. Among motor subtypes, the PIGD group showed a higher prevalence of cognitive impairment (68.8% vs. 46.2%, p < 0.001) and significantly lower irisin levels compared with the TD group [3.25 (2.62-4.14) vs. 4.12 (3.42-5.07) µg/mL, p < 0.001]. Serum irisin levels were weakly but positively associated with memory performance, and this association remained significant after FDR correction across the five cognitive domains (r = 0.194, FDR-adjusted p = 0.010). Compared with patients in the TD-high irisin group, those in the PIGD-low irisin group had higher odds of concurrent cognitive impairment (OR = 6.065, 95% CI: 2.974-18.638, p = 0.002).Conclusion\n\nCognitive impairment was common among patients with PD, particularly those with the PIGD subtype. The PIGD subtype and lower serum irisin levels were associated with the presence of PDCI. In the joint-category analysis, patients in the PIGD-low-irisin group had higher odds of concurrent cognitive impairment than those in the TD-high-irisin group.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China.",
    "Clinical Medical Research Center for Stroke Prevention and Treatment of Hunan Province, Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China.",
    "Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, China.",
    "Center For Medical Genetics, School of Life Sciences, Central South University, Changsha, China.",
    "National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China.",
    "Department of Neurology, Xiangya Hospital, Central South University, Changsha, China.",
    "Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, China.",
    "Department of Medical Genetics, Hunan Province Clinical Medical Research Center For Genetic Birth Defects and Rare Diseases, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Meilin Gui"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Lixia Qin"
    },
    {
      "affs": [
        0
      ],
      "name": "Lingling Lv"
    },
    {
      "affs": [
        0
      ],
      "name": "Jinduo Huang"
    },
    {
      "affs": [
        0
      ],
      "name": "Shenglan Hu"
    },
    {
      "affs": [
        0
      ],
      "name": "Kexin Chen"
    },
    {
      "affs": [
        0
      ],
      "name": "Xing Wang"
    },
    {
      "affs": [
        0
      ],
      "name": "Yiwen Zhou"
    },
    {
      "affs": [
        2,
        3,
        4,
        5
      ],
      "name": "Beisha Tang"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Hainan Zhang"
    },
    {
      "affs": [
        0,
        1,
        2,
        6,
        7
      ],
      "name": "Chunyu Wang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f7a2k93gnerr5.bib",
  "cited_by": 0,
  "doi": "10.1002/brb3.71848",
  "fulltext_url": "https://europepmc.org/articles/PMC13686351",
  "id": "f7a2k93gnerr5",
  "issns": [
    "2162-3279"
  ],
  "landing_url": "https://europepmc.org/article/MED/42905889",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2728|Parkinson's Disease Mechanisms and Treatments"
    ]
  ],
  "openalex": "W7223153497",
  "pdf_url": "https://europepmc.org/articles/PMC13686351?pdf=render",
  "pmcid": "PMC13686351",
  "pmid": "42905889",
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f7a2k93gnerr5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:57Z",
      "native_id": "MED:42905889",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42905889"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2728|Parkinson's Disease Mechanisms and Treatments",
      "subfield": "neurology"
    }
  ],
  "title": "Correlation Between Cognitive Function and Serum Irisin Levels in Parkinson's Disease Patients.",
  "title_text": "Correlation Between Cognitive Function and Serum Irisin Levels in Parkinson's Disease Patients.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:57Z",
  "url": "https://research.draconitic.com/paper/f7a2k93gnerr5",
  "venue": "Brain and behavior",
  "versions": []
}