Pub Date : 2025-12-26DOI: 10.1016/j.parkreldis.2025.108172
Min Soo Kang , Yoon Tae Jung , Seonok Kim , Won Kim
Introduction
We investigated whether Parkinson's disease (PD) alters the topographical distribution of vertebral fractures and the burden of concomitant non-vertebral fractures in patients with osteoporotic vertebral fractures (OVFs).
Methods
Among 1627 OVF patients, 116 with PD were matched (up to 1:4) to 349 controls by age, sex, and duration of radiographic surveillance. Group differences were analyzed using generalized linear mixed models, adjusting for femoral neck bone mineral density (BMD).
Results
PD Patients exhibited higher adjusted risks of total (risk ratio [RR] 2.35, p < 0.001) and vertebral fractures (RR 1.46, p < 0.001). Upper-thoracic (T1–T10) fracture counts were nearly threefold higher in PD (RR 2.97, p < 0.001), with increased prevalence (odds ratio [OR] 1.90, p = 0.010). Although the adjusted within-person proportion of upper-thoracic fractures was not significant (p = 0.125), level-specific mapping showed increased prevalence across T4–T10 in patients with PD. Non-vertebral fractures were markedly more common in PD, particularly at the hip (OR 11.71), distal radius/ulna (OR 20.98), and ribs (OR 8.44) (all p < 0.001). Femoral neck T-scores were significantly lower in PD (p = 0.009).
Conclusion
In patients with prevalent OVFs, PD is associated with a higher fracture burden and a distinct upper-thoracic pattern, even after adjustment for femoral neck BMD. The frequent concomitant non-vertebral fractures underscore fall-related biomechanical risks, highlighting the need for osteoporosis management that includes thoracic imaging and PD-specific interventions.
{"title":"Upper-thoracic predominance and non-vertebral fracture burden in Parkinson's disease: A matched Case–Control study","authors":"Min Soo Kang , Yoon Tae Jung , Seonok Kim , Won Kim","doi":"10.1016/j.parkreldis.2025.108172","DOIUrl":"10.1016/j.parkreldis.2025.108172","url":null,"abstract":"<div><h3>Introduction</h3><div>We investigated whether Parkinson's disease (PD) alters the topographical distribution of vertebral fractures and the burden of concomitant non-vertebral fractures in patients with osteoporotic vertebral fractures (OVFs).</div></div><div><h3>Methods</h3><div>Among 1627 OVF patients, 116 with PD were matched (up to 1:4) to 349 controls by age, sex, and duration of radiographic surveillance. Group differences were analyzed using generalized linear mixed models, adjusting for femoral neck bone mineral density (BMD).</div></div><div><h3>Results</h3><div>PD Patients exhibited higher adjusted risks of total (risk ratio [RR] 2.35, <em>p</em> < 0.001) and vertebral fractures (RR 1.46, <em>p</em> < 0.001). Upper-thoracic (T1–T10) fracture counts were nearly threefold higher in PD (RR 2.97, <em>p</em> < 0.001), with increased prevalence (odds ratio [OR] 1.90, <em>p</em> = 0.010). Although the adjusted within-person proportion of upper-thoracic fractures was not significant (<em>p</em> = 0.125), level-specific mapping showed increased prevalence across T4–T10 in patients with PD. Non-vertebral fractures were markedly more common in PD, particularly at the hip (OR 11.71), distal radius/ulna (OR 20.98), and ribs (OR 8.44) (all <em>p</em> < 0.001). Femoral neck T-scores were significantly lower in PD (<em>p</em> = 0.009).</div></div><div><h3>Conclusion</h3><div>In patients with prevalent OVFs, PD is associated with a higher fracture burden and a distinct upper-thoracic pattern, even after adjustment for femoral neck BMD. The frequent concomitant non-vertebral fractures underscore fall-related biomechanical risks, highlighting the need for osteoporosis management that includes thoracic imaging and PD-specific interventions.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108172"},"PeriodicalIF":3.4,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145864324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-25DOI: 10.1016/j.parkreldis.2025.108171
Yael Barer , Tal Ast , Gabriel Chodick , Gilad Twig , Nir Giladi
Introduction
Despite the widespread adoption of incretin-based therapy (IBT) for type 2 diabetes (T2D) and weight management, its potential neuroprotective effects remain inadequately characterized. Given emerging evidence of IBT's effects on neurodegenerative pathways, determining its association with Parkinson's disease (PD) incidence could have major clinical implications. We investigated the association between IBT and PD incidence in patients with T2D.
Methods
This retrospective cohort study identified patients with T2D between January 2008 and December 2021 who were classified as users or non-users of IBT based on time-dependent exposure and were followed for incident PD until December 2022. Additionally, a systematic literature review and meta-analysis were conducted.
Results
We identified 86,105 patients with T2D, of those, 347 patients developed PD. IBT use was associated with a decreased risk of PD (Hazard Ratio [HR] = 0.76, 95 % Confidence Interval [CI]:0.59–0.98), but this effect did not remain significant after confounders control (HR = 0.87, 95 % CI:0.65–1.15). The meta-analysis, comprising 12 studies and 964,446 patients, including our current cohort, revealed that IBT use was associated with a 30 % lower risk of PD (RR = 0.70, 95 % CI:0.56–0.87). This effect was more pronounced in studies including younger subjects and those with shorter T2D duration at baseline.
Conclusions
The current findings suggest a negative relationship between IBT and risk of PD among patients with T2D, particularly in younger age group with short duration of the disease.
{"title":"Incretin-based therapy and Parkinson's disease risk among patients with type 2 diabetes: Retrospective cohort study and meta-analysis","authors":"Yael Barer , Tal Ast , Gabriel Chodick , Gilad Twig , Nir Giladi","doi":"10.1016/j.parkreldis.2025.108171","DOIUrl":"10.1016/j.parkreldis.2025.108171","url":null,"abstract":"<div><h3>Introduction</h3><div>Despite the widespread adoption of incretin-based therapy (IBT) for type 2 diabetes (T2D) and weight management, its potential neuroprotective effects remain inadequately characterized. Given emerging evidence of IBT's effects on neurodegenerative pathways, determining its association with Parkinson's disease (PD) incidence could have major clinical implications. We investigated the association between IBT and PD incidence in patients with T2D.</div></div><div><h3>Methods</h3><div>This retrospective cohort study identified patients with T2D between January 2008 and December 2021 who were classified as users or non-users of IBT based on time-dependent exposure and were followed for incident PD until December 2022. Additionally, a systematic literature review and meta-analysis were conducted.</div></div><div><h3>Results</h3><div>We identified 86,105 patients with T2D, of those, 347 patients developed PD. IBT use was associated with a decreased risk of PD (Hazard Ratio [HR] = 0.76, 95 % Confidence Interval [CI]:0.59–0.98), but this effect did not remain significant after confounders control (HR = 0.87, 95 % CI:0.65–1.15). The meta-analysis, comprising 12 studies and 964,446 patients, including our current cohort, revealed that IBT use was associated with a 30 % lower risk of PD (RR = 0.70, 95 % CI:0.56–0.87). This effect was more pronounced in studies including younger subjects and those with shorter T2D duration at baseline.</div></div><div><h3>Conclusions</h3><div>The current findings suggest a negative relationship between IBT and risk of PD among patients with T2D, particularly in younger age group with short duration of the disease.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108171"},"PeriodicalIF":3.4,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145864380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-22DOI: 10.1016/j.parkreldis.2025.108170
Mu-Hui Fu , Ryota Satoh , Farwa Ali , Heather M. Clark , Julie Stierwalt , Yehkyoung C. Stephens , Hossam Youssef , Jerusha G. Bhaskaran , Dennis W. Dickson , Keith A. Josephs , Jennifer L. Whitwell
Background
Progressive supranuclear palsy (PSP) syndromes and corticobasal syndrome (CBS) are atypical parkinsonian disorders resulting from 4-repeat (4R) tauopathies. They target a common network of brain regions, although relative involvement of cortical and subcortical regions differs. White matter hyperintensities (WMHs) are explicit in neurodegenerative disorders, however, little is known about their distribution in 4R-tauopathies.
Objectives
To evaluate the distribution of WMHs in the cortical and subcortical predominant 4R-tauopathies using venous territory-based and the derivative layer designed atlases.
Methods
Ninety-five participants with clinical variants of PSP or CBS were recruited by the Neurodegenerative Research Group, Mayo Clinic, and were classified as cortical (n = 64) or subcortical (n = 31) predominant. WMH volume was calculated for superficial, deep cerebral venous territory, and the periventricular (PV) region. Additionally, a layered atlas was created to assess WMH volume from the lateral ventricles (LV) to the brain surface. WMH volumes, clinical tests, and vascular-relevant histories were compared across groups and to 50 age-matched controls.
Results
Compared to the cortical group, the subcortical group had greater WMHs in the deep venous territory (p = 0.04). The major WMHs in the subcortical group distributed in layers 5–10 (12–30 mm from the LV) (p ≤ 0.01). The subcortical group had more histories of old strokes, chronic kidney disease, and headache.
Conclusions
The distribution of WMHs in the deep cerebral venous territory and the presumed watershed zone suggests that dysfunction of the venous system may play a role in the pathomechanism of 4R-tauopathies, particularly subcortical variants.
{"title":"White matter hyperintensities in the deep cerebral venous territory differ between subcortical and cortical 4-repeat tauopathies","authors":"Mu-Hui Fu , Ryota Satoh , Farwa Ali , Heather M. Clark , Julie Stierwalt , Yehkyoung C. Stephens , Hossam Youssef , Jerusha G. Bhaskaran , Dennis W. Dickson , Keith A. Josephs , Jennifer L. Whitwell","doi":"10.1016/j.parkreldis.2025.108170","DOIUrl":"10.1016/j.parkreldis.2025.108170","url":null,"abstract":"<div><h3>Background</h3><div>Progressive supranuclear palsy (PSP) syndromes and corticobasal syndrome (CBS) are atypical parkinsonian disorders resulting from 4-repeat (4R) tauopathies. They target a common network of brain regions, although relative involvement of cortical and subcortical regions differs. White matter hyperintensities (WMHs) are explicit in neurodegenerative disorders, however, little is known about their distribution in 4R-tauopathies.</div></div><div><h3>Objectives</h3><div>To evaluate the distribution of WMHs in the cortical and subcortical predominant 4R-tauopathies using venous territory-based and the derivative layer designed atlases.</div></div><div><h3>Methods</h3><div>Ninety-five participants with clinical variants of PSP or CBS were recruited by the Neurodegenerative Research Group, Mayo Clinic, and were classified as cortical (n = 64) or subcortical (n = 31) predominant. WMH volume was calculated for superficial, deep cerebral venous territory, and the periventricular (PV) region. Additionally, a layered atlas was created to assess WMH volume from the lateral ventricles (LV) to the brain surface. WMH volumes, clinical tests, and vascular-relevant histories were compared across groups and to 50 age-matched controls.</div></div><div><h3>Results</h3><div>Compared to the cortical group, the subcortical group had greater WMHs in the deep venous territory (p = 0.04). The major WMHs in the subcortical group distributed in layers 5–10 (12–30 mm from the LV) (p ≤ 0.01). The subcortical group had more histories of old strokes, chronic kidney disease, and headache.</div></div><div><h3>Conclusions</h3><div>The distribution of WMHs in the deep cerebral venous territory and the presumed watershed zone suggests that dysfunction of the venous system may play a role in the pathomechanism of 4R-tauopathies, particularly subcortical variants.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108170"},"PeriodicalIF":3.4,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-19DOI: 10.1016/j.parkreldis.2025.108169
Marta Skowrońska , Agnieszka Cudna , Zbigniew Grad , Iwona Kurkowska-Jastrzębska
Introduction
Analysis of cerebrospinal fluid examination can provide valuable information about the ongoing pathological processes in the central nervous system. To demonstrate chronic inflammation, oligoclonal bands (OCB) are detected and are typical of chronic demyelinating disease—multiple sclerosis (MS). This study aimed to detect OCB and white matter hyperintensities in patients with C19orf12 mutations.
Methods
Thirteen patients with C19orf12 mutations causing mitochondrial membrane protein-associated neurodegeneration (MPAN) were examined.
Results
Eight patients exhibited oligoclonal bands, with 6 having type 3 and 2 having type 2. All patients with OCB and 3 without OCB showed myelin loss.
Conclusions
Our findings, which reveal chronic inflammation in NBIA-MPAN alongside myelin loss, provide new insights into disease pathology and promote discussion of anti-inflammatory treatments in C19orf12 carriers.
{"title":"Inflammation and oligoclonal bands in cerebrospinal fluid in neurodegeneration associated with C19orf12 mutations","authors":"Marta Skowrońska , Agnieszka Cudna , Zbigniew Grad , Iwona Kurkowska-Jastrzębska","doi":"10.1016/j.parkreldis.2025.108169","DOIUrl":"10.1016/j.parkreldis.2025.108169","url":null,"abstract":"<div><h3>Introduction</h3><div>Analysis of cerebrospinal fluid examination can provide valuable information about the ongoing pathological processes in the central nervous system. To demonstrate chronic inflammation, oligoclonal bands (OCB) are detected and are typical of chronic demyelinating disease—multiple sclerosis (MS). This study aimed to detect OCB and white matter hyperintensities in patients with <em>C19orf12</em> mutations.</div></div><div><h3>Methods</h3><div>Thirteen patients with <em>C19orf12</em> mutations causing mitochondrial membrane protein-associated neurodegeneration (MPAN) were examined.</div></div><div><h3>Results</h3><div>Eight patients exhibited oligoclonal bands, with 6 having type 3 and 2 having type 2. All patients with OCB and 3 without OCB showed myelin loss.</div></div><div><h3>Conclusions</h3><div>Our findings, which reveal chronic inflammation in NBIA-MPAN alongside myelin loss, provide new insights into disease pathology and promote discussion of anti-inflammatory treatments in <em>C19orf12</em> carriers.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108169"},"PeriodicalIF":3.4,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-18DOI: 10.1016/j.parkreldis.2025.108162
Peyman Petramfar , Joseph Jankovic
Yawning-related tremor (YRT), tremor triggered by or exacerbated during yawning, has been described anecdotally in Parkinson's disease (PD), but never systematically studied. We aimed to determine the prevalence and clinical associations of YRT in PD. In this cross-sectional study, 119 PD patients and 74 controls completed a structured questionnaire. YRT was significantly more common in PD patients (18.5 %) than in controls (2.7 %) (p = 0.001). YRT prevalence was especially high in PD patients with co-existent essential tremor (41.2 %) and in those with probable REM sleep behavior disorder (68.2 %). In 31.8 % of cases, YRT preceded the onset of motor symptoms by an average of 21 months, suggesting a possible prodromal feature. Upper limbs were most frequently affected. These findings support the concept that YRT may reflect shared brainstem pathophysiology with RBD and essential tremor, and could serve as a clinical marker of early neurodegeneration in PD.
{"title":"Yawning-related tremor in patients with Parkinson's disease","authors":"Peyman Petramfar , Joseph Jankovic","doi":"10.1016/j.parkreldis.2025.108162","DOIUrl":"10.1016/j.parkreldis.2025.108162","url":null,"abstract":"<div><div>Yawning-related tremor (YRT), tremor triggered by or exacerbated during yawning, has been described anecdotally in Parkinson's disease (PD), but never systematically studied. We aimed to determine the prevalence and clinical associations of YRT in PD. In this cross-sectional study, 119 PD patients and 74 controls completed a structured questionnaire. YRT was significantly more common in PD patients (18.5 %) than in controls (2.7 %) (p = 0.001). YRT prevalence was especially high in PD patients with co-existent essential tremor (41.2 %) and in those with probable REM sleep behavior disorder (68.2 %). In 31.8 % of cases, YRT preceded the onset of motor symptoms by an average of 21 months, suggesting a possible prodromal feature. Upper limbs were most frequently affected. These findings support the concept that YRT may reflect shared brainstem pathophysiology with RBD and essential tremor, and could serve as a clinical marker of early neurodegeneration in PD.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108162"},"PeriodicalIF":3.4,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145828191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-17DOI: 10.1016/j.parkreldis.2025.108142
Antoniangela Cocco , Roberta Zangaglia , Giorgio Belluscio , Micol Avenali , Francesca Valentino , Rosaria Calabrese , Tiziana De Santis , Paola Polverino , Alberto Albanese
Background
Subcutaneous foslevodopa (fLD) infusions are a new therapeutic option for treating complicated Parkinson's disease (PD).
Objectives
To assess the initial period of fLD infusion as replacement of oral medications in PD.
Methods
PD patients started infusion treatment according to recommended practice. Efficacy was assessed using the MDS-UPDRS motor examination and motor complications scores in the ON condition at baseline and after 20 weeks. Safety and fLD doses were assessed on a weekly basis. The 20-week observation period was compared to baseline.
Results
On week 20 the MDS-UPDRS motor examination score was unchanged, whereas the motor complications score was improved, indicating increased ON time without troublesome dyskinesias and reduced OFF time. The initial fLD dosage was gradually increased in all patients, by 37 % on week 20. Treatment optimization was achieved at a median of 12 weeks; patients with higher body mass index required a longer titration period. The levodopa equivalent daily dose of fLD on week 20 was 0.57mg. Adverse events occurred in 87 % of patients, primarily consisting of skin reactions at the infusion sites that occasionally required treatment.
Discussion
fLD infusion reduced motor fluctuations while maintaining stable ON motor performance. The infusion dose was progressively increased in the initial treatment period. The time needed for treatment stabilization was longer than previously reported and delayed in patients with higher body mass index. The treatment was generally well tolerated, neuropsychiatric effects were more common than previously reported.
{"title":"Initiating foslevodopa infusion in Parkinson disease: a pragmatic study","authors":"Antoniangela Cocco , Roberta Zangaglia , Giorgio Belluscio , Micol Avenali , Francesca Valentino , Rosaria Calabrese , Tiziana De Santis , Paola Polverino , Alberto Albanese","doi":"10.1016/j.parkreldis.2025.108142","DOIUrl":"10.1016/j.parkreldis.2025.108142","url":null,"abstract":"<div><h3>Background</h3><div>Subcutaneous foslevodopa (fLD) infusions are a new therapeutic option for treating complicated Parkinson's disease (PD).</div></div><div><h3>Objectives</h3><div>To assess the initial period of fLD infusion as replacement of oral medications in PD.</div></div><div><h3>Methods</h3><div>PD patients started infusion treatment according to recommended practice. Efficacy was assessed using the MDS-UPDRS motor examination and motor complications scores in the ON condition at baseline and after 20 weeks. Safety and fLD doses were assessed on a weekly basis. The 20-week observation period was compared to baseline.</div></div><div><h3>Results</h3><div>On week 20 the MDS-UPDRS motor examination score was unchanged, whereas the motor complications score was improved, indicating increased ON time without troublesome dyskinesias and reduced OFF time. The initial fLD dosage was gradually increased in all patients, by 37 % on week 20. Treatment optimization was achieved at a median of 12 weeks; patients with higher body mass index required a longer titration period. The levodopa equivalent daily dose of fLD on week 20 was 0.57mg. Adverse events occurred in 87 % of patients, primarily consisting of skin reactions at the infusion sites that occasionally required treatment.</div></div><div><h3>Discussion</h3><div>fLD infusion reduced motor fluctuations while maintaining stable ON motor performance. The infusion dose was progressively increased in the initial treatment period. The time needed for treatment stabilization was longer than previously reported and delayed in patients with higher body mass index. The treatment was generally well tolerated, neuropsychiatric effects were more common than previously reported.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108142"},"PeriodicalIF":3.4,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145828227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-17DOI: 10.1016/j.parkreldis.2025.108165
Philip Pavlovsky , Anna Golik , Anna Gamaleya , Alexey Tomskiy , Marina Shulskaya , Alexey Sedov , Petr Slominsky , Elena Belova
Introduction
Electrophysiological features of monogenic early onset Parkinson's disease (EOPD) are poorly studied. This lack of knowledge hinders the development of personalized therapy for patients suffering from these PD forms. In this work, we aimed to investigate the differences in STN activity in patients with PRKN mutation and idiopathic EOPD (iEOPD).
Methods
All the patients underwent clinical evaluation assessing their disease phenotype. We utilized MLPA to test for the mutations in target genes and selected six patients with homozygous ex.8 deletion in PRKN gene. Seven patients without mutations were recruited to a control group. We recorded subthalamic activity intraoperatively, and analyzed single cell patterning and oscillations as well as LFPs.
Results
PRKN patients without off-dystonia demonstrated less prominent alpha and low beta oscillations but had more pause-burst cells compared to iEOPD. Pause-burst neurons were predominant in patients with dystonia regardless of the mutation, while the proportion of alpha-oscillating cells in PRKN patients with dystonia was drastically increased. STN activity in PRKN-PD and iEOPD did not differ significantly when compared without accounting for dystonia.
Conclusions
PRKN mutation alters subthalamic activity both in single cell patterns and oscillations. Future research may benefit from accounting for dystonia when studying EOPD.
{"title":"Altered subthalamic alpha-beta oscillations in PRKN-associated early onset Parkinson's disease in relation to off-dystonia","authors":"Philip Pavlovsky , Anna Golik , Anna Gamaleya , Alexey Tomskiy , Marina Shulskaya , Alexey Sedov , Petr Slominsky , Elena Belova","doi":"10.1016/j.parkreldis.2025.108165","DOIUrl":"10.1016/j.parkreldis.2025.108165","url":null,"abstract":"<div><h3>Introduction</h3><div>Electrophysiological features of monogenic early onset Parkinson's disease (EOPD) are poorly studied. This lack of knowledge hinders the development of personalized therapy for patients suffering from these PD forms. In this work, we aimed to investigate the differences in STN activity in patients with <em>PRKN</em> mutation and idiopathic EOPD (iEOPD).</div></div><div><h3>Methods</h3><div>All the patients underwent clinical evaluation assessing their disease phenotype. We utilized MLPA to test for the mutations in target genes and selected six patients with homozygous ex.8 deletion in <em>PRKN</em> gene. Seven patients without mutations were recruited to a control group. We recorded subthalamic activity intraoperatively, and analyzed single cell patterning and oscillations as well as LFPs.</div></div><div><h3>Results</h3><div><em>PRKN</em> patients without off-dystonia demonstrated less prominent alpha and low beta oscillations but had more pause-burst cells compared to iEOPD. Pause-burst neurons were predominant in patients with dystonia regardless of the mutation, while the proportion of alpha-oscillating cells in <em>PRKN</em> patients with dystonia was drastically increased. STN activity in <em>PRKN-</em>PD and iEOPD did not differ significantly when compared without accounting for dystonia.</div></div><div><h3>Conclusions</h3><div><em>PRKN</em> mutation alters subthalamic activity both in single cell patterns and oscillations. Future research may benefit from accounting for dystonia when studying EOPD.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108165"},"PeriodicalIF":3.4,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-16DOI: 10.1016/j.parkreldis.2025.108164
Zhenxiang Gao , Austin A. Kennemer , David C. Kaelber , Rong Xu
Background
Traumatic Brain Injury (TBI) is a major risk factor for Parkinson's Disease (PD), and while neurorehabilitation is essential in TBI care, the effect of its timing on PD risk is unclear.
Objective
This study aimed to evaluate whether early versus delayed initiation of neurorehabilitation following moderate to severe TBI is associated with a differential risk of developing PD.
Methods
This retrospective cohort study analyzed U.S. electronic health records from the TriNetX platform to compare the risk of PD among patients with documented moderate or severe TBI who received immediate treatment versus delayed treatment. The primary outcome was PD incidence, and PD-related medication prescriptions served as a secondary outcome. Cox proportional hazards models were used to estimate hazard ratios (HRs) for PD risk.
Results
The propensity score-matched cohorts demonstrated that patients who received immediate neurorehabilitation (within 1 week following TBI) compared with those received delayed neurorehabilitation (8 days–6 months following TBI) had significantly lower risk of developing PD at 3 years (HR: 0.66 (95 % CI: 0.48–0.91) and 5 years (HR: 0.69 (95 % CI: 0.52–0.91). Similar reductions were also observed for PD-related medication prescriptions. Sensitivity analyses using alternative time windows to define early versus delayed treatment, as well as analyses excluding patients with severe conditions or those who underwent craniotomy or craniectomy, yielded consistent findings.
Conclusions
Our findings suggest that early neurorehabilitation following moderate to severe TBI was associated with reduced long-term risk of PD. Future research is warranted to elucidate the underlying biological mechanisms, evaluate the optimal timing and intensity of rehabilitation.
{"title":"Association of neurorehabilitation timing with Parkinson's disease development following moderate to severe traumatic brain injury: A retrospective cohort study","authors":"Zhenxiang Gao , Austin A. Kennemer , David C. Kaelber , Rong Xu","doi":"10.1016/j.parkreldis.2025.108164","DOIUrl":"10.1016/j.parkreldis.2025.108164","url":null,"abstract":"<div><h3>Background</h3><div>Traumatic Brain Injury (TBI) is a major risk factor for Parkinson's Disease (PD), and while neurorehabilitation is essential in TBI care, the effect of its timing on PD risk is unclear.</div></div><div><h3>Objective</h3><div>This study aimed to evaluate whether early versus delayed initiation of neurorehabilitation following moderate to severe TBI is associated with a differential risk of developing PD.</div></div><div><h3>Methods</h3><div>This retrospective cohort study analyzed U.S. electronic health records from the TriNetX platform to compare the risk of PD among patients with documented moderate or severe TBI who received immediate treatment versus delayed treatment. The primary outcome was PD incidence, and PD-related medication prescriptions served as a secondary outcome. Cox proportional hazards models were used to estimate hazard ratios (HRs) for PD risk.</div></div><div><h3>Results</h3><div>The propensity score-matched cohorts demonstrated that patients who received immediate neurorehabilitation (within 1 week following TBI) compared with those received delayed neurorehabilitation (8 days–6 months following TBI) had significantly lower risk of developing PD at 3 years (HR: 0.66 (95 % CI: 0.48–0.91) and 5 years (HR: 0.69 (95 % CI: 0.52–0.91). Similar reductions were also observed for PD-related medication prescriptions. Sensitivity analyses using alternative time windows to define early versus delayed treatment, as well as analyses excluding patients with severe conditions or those who underwent craniotomy or craniectomy, yielded consistent findings.</div></div><div><h3>Conclusions</h3><div>Our findings suggest that early neurorehabilitation following moderate to severe TBI was associated with reduced long-term risk of PD. Future research is warranted to elucidate the underlying biological mechanisms, evaluate the optimal timing and intensity of rehabilitation.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108164"},"PeriodicalIF":3.4,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145820055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-16DOI: 10.1016/j.parkreldis.2025.108166
Bart R. Maas , Gert-Jan de Vries , Giulio Valenti , Andreas Ejupi , Bastiaan R. Bloem , Sirwan K.L. Darweesh , Nienke M. de Vries
Background
The association between physical activity and falls among people with Parkinson's disease (PD) is unclear. Their interrelationship is likely complex: falling is typically most prominent among active people (i.e. those with less disease severity), but falling also worsens as balance becomes compromised (i.e. among more severely affected persons). Physical activity could therefore be related to both more and fewer falls in an inverted-U relationship.
Objective
To examine physical activity and falls among people with PD with a fall history, to study whether (change in) physical activity is different for fallers and non-fallers, and to determine whether physical activity levels are related to the number of falls.
Methods
Physical activity and falls were prospectively measured continuously over a 1-year period using a smartwatch and diaries in people with PD with a fall history.
Results
We analyzed data of 167 participants (mean age 69 years, 37 % females). The average daily step count was 4891 (SD = 2912) and median fall rate was 3 falls/person-year (Q1-Q3, 0–8.5), both stable during follow-up. Step count was similar for fallers (4866) and non-fallers (4960) (t(76) = 0.18, p = 0.86). Step count was not related to the number of falls in a linear relationship (Beta = −0.36, p = 0.97) nor in an inverted-U relationship (Beta = 0.14, p = 0.21).
Conclusion
We found no evidence that physical activity levels were different for fallers and non-fallers, or were related to the number of falls. This population with a fall history was quite sedentary and fell frequently, and these patterns were consistent during the relatively brief observation period of 1 year.
背景:体育活动与帕金森病(PD)患者跌倒之间的关系尚不清楚。它们之间的相互关系可能是复杂的:跌倒通常在活跃的人(即疾病严重程度较低的人)中最为突出,但随着平衡受到损害(即受影响较严重的人),跌倒也会恶化。因此,体育活动可能与跌倒的次数和次数都呈倒u型关系。目的:调查有跌倒史的PD患者的身体活动和跌倒情况,研究跌倒者和非跌倒者的身体活动(变化)是否不同,确定身体活动水平是否与跌倒次数有关。方法:在有跌倒史的PD患者中,使用智能手表和日记前瞻性地连续测量了1年的身体活动和跌倒情况。结果:我们分析了167名参与者的资料(平均年龄69岁,37%为女性)。平均每日步数为4891 (SD = 2912),中位跌倒率为3次/人年(Q1-Q3, 0-8.5),随访期间均稳定。跌倒者(4866)和非跌倒者(4960)的步数相似(t(76) = 0.18, p = 0.86)。步数与跌倒次数之间不存在线性关系(Beta = -0.36, p = 0.97),也不存在倒u关系(Beta = 0.14, p = 0.21)。结论:我们没有发现证据表明跌倒者和非跌倒者的身体活动水平有差异,或与跌倒次数有关。有跌倒史的人群久坐不动,经常跌倒,这些模式在相对较短的1年观察期内是一致的。
{"title":"Relationship between falls and physical activity in daily life of people with Parkinson's disease","authors":"Bart R. Maas , Gert-Jan de Vries , Giulio Valenti , Andreas Ejupi , Bastiaan R. Bloem , Sirwan K.L. Darweesh , Nienke M. de Vries","doi":"10.1016/j.parkreldis.2025.108166","DOIUrl":"10.1016/j.parkreldis.2025.108166","url":null,"abstract":"<div><h3>Background</h3><div>The association between physical activity and falls among people with Parkinson's disease (PD) is unclear. Their interrelationship is likely complex: falling is typically most prominent among active people (i.e. those with less disease severity), but falling also worsens as balance becomes compromised (i.e. among more severely affected persons). Physical activity could therefore be related to both more and fewer falls in an inverted-U relationship.</div></div><div><h3>Objective</h3><div>To examine physical activity and falls among people with PD with a fall history, to study whether (change in) physical activity is different for fallers and non-fallers, and to determine whether physical activity levels are related to the number of falls.</div></div><div><h3>Methods</h3><div>Physical activity and falls were prospectively measured continuously over a 1-year period using a smartwatch and diaries in people with PD with a fall history.</div></div><div><h3>Results</h3><div>We analyzed data of 167 participants (mean age 69 years, 37 % females). The average daily step count was 4891 (SD = 2912) and median fall rate was 3 falls/person-year (Q1-Q3, 0–8.5), both stable during follow-up. Step count was similar for fallers (4866) and non-fallers (4960) (t(76) = 0.18, p = 0.86). Step count was not related to the number of falls in a linear relationship (Beta = −0.36, p = 0.97) nor in an inverted-U relationship (Beta = 0.14, p = 0.21).</div></div><div><h3>Conclusion</h3><div>We found no evidence that physical activity levels were different for fallers and non-fallers, or were related to the number of falls. This population with a fall history was quite sedentary and fell frequently, and these patterns were consistent during the relatively brief observation period of 1 year.</div></div>","PeriodicalId":19970,"journal":{"name":"Parkinsonism & related disorders","volume":"143 ","pages":"Article 108166"},"PeriodicalIF":3.4,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145820106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}