scholarly journals Changes of Peripheral Nerve Function and Vitamin B12 Level in People With Parkinson's Disease

2020 ◽  
Vol 11 ◽  
Author(s):  
Feng Qiu ◽  
Yue Wu ◽  
Hui Cao ◽  
Ben Liu ◽  
Mingyang Du ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Peripheral Nerve ◽  
Vitamin B12 ◽  
Nerve Function ◽  
Peripheral Nerve Function

scholarly journals Relationship Between Vitamin B12 and Sensory and Motor Peripheral Nerve Function in Older Adults

2012 ◽  
Vol 60 (6) ◽  
pp. 1057-1063 ◽  
Author(s):  
Kira Leishear ◽  
Robert M. Boudreau ◽  
Stephanie A. Studenski ◽  
Luigi Ferrucci ◽  
Caterina Rosano ◽  
...  
Keyword(s):  
Older Adults ◽  
Peripheral Nerve ◽  
Vitamin B12 ◽  
Nerve Function ◽  
Peripheral Nerve Function

scholarly journals Vitamin B12 and Homocysteine Levels and 6-Year Change in Peripheral Nerve Function and Neurological Signs

2011 ◽  
Vol 67A (5) ◽  
pp. 537-543 ◽  
Author(s):  
K. Leishear ◽  
L. Ferrucci ◽  
F. Lauretani ◽  
R. M. Boudreau ◽  
S. A. Studenski ◽  
...  
Keyword(s):  
Peripheral Nerve ◽  
Vitamin B12 ◽  
Nerve Function ◽  
Neurological Signs ◽  
Peripheral Nerve Function

scholarly journals Gait and Balance Changes with Investigational Peripheral Nerve Cell Therapy during Deep Brain Stimulation in People with Parkinson’s Disease

2021 ◽  
Vol 11 (4) ◽  
pp. 500
Author(s):  
Geetanjali Gera ◽  
Zain Guduru ◽  
Tritia Yamasaki ◽  
Julie A. Gurwell ◽  
Monica J. Chau ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Deep Brain Stimulation ◽  
Peripheral Nerve ◽  
Brain Stimulation ◽  
Step Length ◽  
Gait Velocity ◽  
Balance Performance ◽  
Improved Performance ◽  
Deep Brain

Background: The efficacy of deep brain stimulation (DBS) and dopaminergic therapy is known to decrease over time. Hence, a new investigational approach combines implanting autologous injury-activated peripheral nerve grafts (APNG) at the time of bilateral DBS surgery to the globus pallidus interna. Objectives: In a study where APNG was unilaterally implanted into the substantia nigra, we explored the effects on clinical gait and balance assessments over two years in 14 individuals with Parkinson’s disease. Methods: Computerized gait and balance evaluations were performed without medication, and stimulation was in the off state for at least 12 h to best assess the role of APNG implantation alone. We hypothesized that APNG might improve gait and balance deficits associated with PD. Results: While people with a degenerative movement disorder typically worsen with time, none of the gait parameters significantly changed across visits in this 24 month study. The postural stability item in the UPDRS did not worsen from baseline to the 24-month follow-up. However, we measured gait and balance improvements in the two most affected individuals, who had moderate PD. In these two individuals, we observed an increase in gait velocity and step length that persisted over 6 and 24 months. Conclusions: Participants did not show worsening of gait and balance performance in the off therapy state two years after surgery, while the two most severely affected participants showed improved performance. Further studies may better address the long-term maintanenace of these results.

scholarly journals Chemotherapy-induced peripheral neuropathy: longitudinal analysis of predictors for postural control

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jana Müller ◽  
Charlotte Kreutz ◽  
Steffen Ringhof ◽  
Maximilian Koeppel ◽  
Nikolaus Kleindienst ◽  
...  
Keyword(s):  
Peripheral Neuropathy ◽  
Peripheral Nerve ◽  
Postural Control ◽  
Action Potentials ◽  
Exercise Intervention ◽  
Cross Sectional Study ◽  
Nerve Function ◽  
Cross Sectional ◽  
Peripheral Nerve Function

AbstractImpaired postural control is often observed in response to neurotoxic chemotherapy. However, potential explanatory factors other than chemotherapy-induced peripheral neuropathy (CIPN) have not been adequately considered to date due to primarily cross-sectional study designs. Our objective was to comprehensively analyze postural control during and after neurotoxic chemotherapy, and to identify potential CIPN-independent predictors for its impairment. Postural control and CIPN symptoms (EORTC QLQ-CIPN20) were longitudinally assessed before, during and three weeks after neurotoxic chemotherapy, and in three and six months follow-up examinations (N = 54). The influence of peripheral nerve function as determined by nerve conduction studies (NCS: compound motor action potentials (CMAP) and sensory action potentials (SNAP)), physical activity, and muscle strength on the change in postural control during and after chemotherapy was analyzed by multiple linear regression adjusted for age and body mass index. Postural control, CIPN signs/symptoms, and CMAP/SNAP amplitudes significantly deteriorated during chemotherapy (p < .01). During follow-up, patients recovered from postural instabilities (p < .01), whereas CIPN signs/symptoms and pathologic NCS findings persisted compared to baseline (p < .001). The regression model showed that low CMAP and high SNAP amplitudes at baseline predicted impairment of postural control during but not after chemotherapy. Hence, pre-therapeutically disturbed somatosensory inputs may induce adaptive processes that have compensatory effects and allow recovery of postural control while CIPN signs/symptoms and pathologic peripheral nerve function persist. Baseline NCS findings in cancer patients who receive neurotoxic chemotherapy thus might assist in delineating individual CIPN risk profiles more precisely to which specific exercise intervention programs could be tailor-made.

scholarly journals Vitamin B12 modulates Parkinson’s disease LRRK2 kinase activity through allosteric regulation and confers neuroprotection

Cell Research ◽  
2019 ◽  
Vol 29 (4) ◽  
pp. 313-329 ◽  
Author(s):  
Adam Schaffner ◽  
Xianting Li ◽  
Yacob Gomez-Llorente ◽  
Emmanouela Leandrou ◽  
Anna Memou ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Vitamin B12 ◽  
Kinase Activity ◽  
Allosteric Regulation ◽  
Lrrk2 Kinase ◽  
Lrrk2 Kinase Activity
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