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Parkinson's disease (PD) is the second most common neurological disorder, associated with decreased dopamine levels in the brain. The goal of this study was to assess the potential of a regenerative medicine-based cell therapy approach to increase dopamine levels. In this study, we used rat adrenal pheochromocytoma (PC12) cells that can produce, store, and secrete dopamine. These cells were microencapsulated in the selectively permeable polymer membrane to protect them from immune responses. For fabrication of the microcapsules, we used a modified Buchi spray dryer B-190 that allows for fast manufacturing of microcapsules and is industrially scalable. Size optimization of the microcapsules was performed by systematically varying key parameters of the spraying device. The short- and long-term stabilities of the microcapsules were assessed. In the in vitro study, the cells were found viable for a period of 30 days. Selective permeability of the microcapsules was confirmed via dopamine release assay and micro BCA protein assay. We found that the microcapsules were permeable to the small molecules including dopamine and were impermeable to the large molecules like BSA. Thus, they can provide the protection to the encapsulated cells from the immune cells. Griess's assay confirmed the non-immunogenicity of the microcapsules. These results demonstrate the effective fabrication of microcapsules encapsulating cells using an industrially scalable device. The microcapsules were stable, and the cells were viable inside the microcapsules and were found to release dopamine. Thus, these microcapsules have the potential to serve as the alternative or complementary treatment approach for PD.
To identify staff and participants perspectives of best practices that facilitate achieving enrollment and retention targets in biomedical cohort studies in Caribbean populations.
Eight focus group discussions (FGDs) were held with research stakeholders including research (i) nurses/study supervisors, (ii) field staff/data collectors, and (iii) rural and urban participants of the Third Jamaica Health and Lifestyle Survey (a national NCD risk factor survey with biospecimen collection) to capture qualitative data on experiences with recruitment, training, retention challenges and potential solutions or strategies for strengthening future efforts.
Our findings indicate that trained, experienced study staff with good interpersonal communication skills enhanced the proficiency of field operations and attracted study participants. Targeted community and stakeholder engagement alongside strong support from the coordinating center increased the reach and efficiency of the data collectors. Timely participant feera including the US and Caribbean into biomedical studies including cancer research.
The aim of this review article was to summarize the cardiovascular and blood pressure profile regarding Parkinson disease patients and to provide an update on the recent advancements in the field of the diagnosis and management of blood pressure abnormalities in these patients. Our goal was to guide physicians to avoid pitfalls in current practice while treating patients with Parkinson disease and blood pressure abnormalities. For this purpose, we searched bibliographic databases (PubMed, Google Scholar) for all publications published on blood pressure effects in Parkinson disease until May 2020. Furthermore, we highlight some thoughts and potential perspectives for the next possible steps in the field.
Blood pressure dysregulation in patients with Parkinson's disease has several implications in clinical practice and presents an ongoing concern. Compared with chronic essential hypertension, the syndrome of combined neurogenic orthostatic hypotension and supine hypertension in Parkinson's disease has receiombined neurogenic orthostatic hypotension and supine hypertension in Parkinson's disease has received little attention. If left untreated, hypertension may lead to cardiovascular disease whereas hypotension may lead to fall-related complications, with tremendous impact on the quality of life of affected individuals. The effect of blood Epressure control and the risk of death from cardiovascular disease in Parkinson disease are largely unexplored. Blood pressure abnormalities in Parkinson disease present bidirectional relationship and the rationale for treating and controlling hypertension in persons with Parkinson disease and concurrent neurogenic orthostatic hypotension and/or supine hypertension is compelling. selleck compound Further research is warranted in order to clarify the mechanisms, clinical implications, and potential reversibility of compromised cardiovascular function, in persons with Parkinson disease.
Pectin methylesterase inhibitor gene family in the seven Rosaceae species (including three pear cultivars) is characterized and three pectin methylesterase inhibitor genes are identified to regulate pollen tube growth in pear. Pectin methylesterase inhibitor (PMEI) participates in a variety of biological processes in plants. However, the information and function of PMEI genes in Rosaceae are largely unknown. In this study, a total of 423 PMEI genes are identified in the genomes of seven Rosaceae species. The PMEI genes in pear are categorized into five subfamilies based on structural analysis and evolutionary analysis. WGD and TD are the main duplication events in the PMEI gene family of pear. Quantitative real-time PCR analysis indicates that PbrPMEI23, PbrPMEI39, and PbrPMEI41 are increasingly expressed during pear pollen tube growth. Under the treatment of recombinant proteins PbrPMEI23, PbrPMEI39 or PbrPMEI41, the content of methylesterified pectin at the region 5-20μm from the pollen tube tip significaing pear pollen tube growth. Under the treatment of recombinant proteins PbrPMEI23, PbrPMEI39 or PbrPMEI41, the content of methylesterified pectin at the region 5-20 μm from the pollen tube tip significantly increases, and the growth of pear pollen tubes is promoted. These results indicate that PMEI regulates the growth of pollen tubes by changing the distribution of methylesterified pectin in the apex.
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