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Woo JA, Zhao X, Khan H, Penn C, Wang X, Joly-Amado A, Weeber E, Morgan D, Kang DE. Correction to: Slingshot-Cofilin activation mediates mitochondrial and synaptic dysfunction via A β ligation to β1-integrin conformers. Cell Death Differ 2022; 29:2562. [DOI: 10.1038/s41418-022-01055-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Arrigo R, Aureau D, Bhatt P, Buckingham MA, Counter JJC, D'Acunto G, Davies PR, Evans DA, Flavell WR, Gibson JS, Guan S, Held G, Isaacs M, Kahk JM, Kastorp CFP, Kersell H, Krizan A, Large AI, Lindsay R, Lischner J, Lömker P, Morgan D, Nemšák S, Nilsson A, Payne D, Reed BP, Renault O, Rupprechter G, Shard AG, Shozi M, Silly MG, Skinner WSJ, Solal F, Stoerzinger KA, Suzer S, Velasco Vélez JJ, Walker M, Weatherup RS. In situ methods: discoveries and challenges: general discussion. Faraday Discuss 2022; 236:219-266. [PMID: 35968885 DOI: 10.1039/d2fd90025d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Aureau D, Bartels-Rausch T, Buckingham MA, Conard T, Dell'Angela M, Flavell W, Gibson JS, Held G, Isaacs M, Kastorp CFP, Krizan A, Lindsay R, Lömker P, Morgan D, Osundare A, Palgrave R, Pei Y, Renault O, Roberts A, Rupprechter G, Shard A, Solal F, Spencer B, Weatherup R. Buried interfaces: general discussion. Faraday Discuss 2022; 236:338-351. [PMID: 35920282 DOI: 10.1039/d2fd90026b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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McMullan JC, Sweeney S, Hoey M, Meenagh G, Patterson B, Morgan D. Postpartum piriformis pyomyositis following vaginal delivery. J OBSTET GYNAECOL 2022; 42:2511-2512. [PMID: 35653771 DOI: 10.1080/01443615.2022.2069000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Huey S, Krisher JT, Morgan D, Mkambula P, Srinivasan B, Gannon BM, Mbuya MNN, Mehta S. Portable Devices for Measurement of Vitamin A Concentrations in Edible Oil: Field Readiness of Available Options. ACS OMEGA 2022; 7:17502-17518. [PMID: 35664625 PMCID: PMC9161250 DOI: 10.1021/acsomega.1c07181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 04/28/2022] [Indexed: 06/15/2023]
Abstract
Vitamin A (VA) deficiency continues to be a major global health issue, despite measures to increase VA intake via consumption of staple foods such as edible oil. Portable quantitative and semiquantitative devices or test kits for internal quality control have the potential to overcome some of the limitations of traditional methods of testing, such as centralized laboratory, expensive equipment, and specially trained staff. This landscape analysis and comprehensive systematic mini-review catalogs and summarizes evidence on the analytical performance of portable quantitative and semiquantitative devices and test kits for the analysis of VA in edible oil. Studies or reports detailing the usability and validation of portable devices and/or test kits, as well as studies comparing device/test kit performance to a reference standard such as high-performance liquid chromatography (HPLC), were included. Identified devices and test kits were compared for performance versus the reference standard, usability, availability, and other characteristics. We identified four portable methods: two devices, the iCheck CHROMA and iCheck Chroma 3 from BioAnalyt; and two test kits, the QuickView from Bagco Enterprises and the Strategic Alliance for the Fortification of Vegetable Oils (SAFO) Test Kit by Badische Anilin and Soda Fabrik (BASF). Included studies reported the following: an internal validation of the portable method, a comparison of the portable method against a reference standard, a comparison of the portable method against another portable method, and several videos and company websites, which detailed device characteristics. iCheck CHROMA and QuickView quantified VA concentrations with high accuracy and precision compared to the reference standard for field-based quantification, were user-friendly, and provided results within 5 min. iCheck Chroma 3 requires more robust validation against a reference standard. We did not find data on internal validation or comparison against a reference standard for the current version of the SAFO test. Compared to QuickView and SAFO, the iCheck devices can transfer results to a hard drive or the Web, have an online order form for purchase, and meet a minimal set of criteria for point-of-need devices. iCheck, QuickView, and SAFO can quantify VA concentrations in the edible oils tested and determine whether a fortified oil meets country standards. Additional research is needed to validate these devices and test kits across additional oil types and document the ability to meet the minimal criteria for point-of-need devices suggested in this mini-review. Validation against a reference standard is required for SAFO. The limited number of portable methods available may be due to market saturation. Future market and use case analyses to inform the market size and utility of the different tests with publicly available data will allow new manufacturers, particularly those in lower-to-middle-income countries, to enter the market.
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Cho JM, Park S, Kwon OS, La Salle DT, Cerbie J, Fermoyle CC, Morgan D, Nelson A, Bledsoe A, Bharath LP, Tandar M, Kunapuli SP, Richardson RS, Babu PVA, Mookherjee S, Kishore BK, Wang F, Yang T, Boudina S, Trinity JD, Symons JD. Activating P2Y
1
receptors improves function in arteries with repressed autophagy. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r4362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Morgan D, Xiang F. Tendances récentes des dépenses de santé dans les pays de l’OCDE, et réactions aux chocs économiques et épidémiques. MÉDECINE DES MALADIES MÉTABOLIQUES 2022. [PMCID: PMC8922284 DOI: 10.1016/j.mmm.2022.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
L’analyse de l’évolution récente des dépenses de santé met en évidence les deux chocs : la crise économique de 2008, et l’impact récent de la maladie à coronavirus 2019 (COVID-19) en 2020. Alors que les économies des pays de l’Organisation de coopération et de développement économiques (OCDE) se sont contractées fortement en 2008 et 2009, la part des dépenses de santé est restée relativement stable. En 2020, avec les fermetures généralisées et autres mesures de santé publique limitant drastiquement l’activité économique, de nombreuses économies de l’OCDE ont connu un déclin en chute libre. La nécessité d’accroître les dépenses de santé, notamment de la part des gouvernements, face à la pandémie, a engendré une croissance des dépenses de santé la plus rapide jamais enregistrée au sein de la zone OCDE au cours des 15 dernières années.
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Gordon MN, Heneka MT, Le Page LM, Limberger C, Morgan D, Tenner AJ, Terrando N, Willette AA, Willette SA. Impact of COVID-19 on the Onset and Progression of Alzheimer's Disease and Related Dementias: A Roadmap for Future Research. Alzheimers Dement 2022; 18:1038-1046. [PMID: 34874605 PMCID: PMC9011667 DOI: 10.1002/alz.12488] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 07/29/2021] [Indexed: 12/12/2022]
Abstract
COVID-19 causes lasting neurological symptoms in some survivors. Like other infections, COVID-19 may increase risk of cognitive impairment. This perspective highlights four knowledge gaps about COVID-19 that need to be filled to avoid this possible health issue. The first is the need to identify the COVID-19 symptoms, genetic polymorphisms and treatment decisions associated with risk of cognitive impairment. The second is the absence of model systems in which to test hypotheses relating infection to cognition. The third is the need for consortia for studying both existing and new longitudinal cohorts in which to monitor long term consequences of COVID-19 infection. A final knowledge gap discussed is the impact of the isolation and lack of social services brought about by quarantine/lockdowns on people living with dementia and their caregivers. Research into these areas may lead to interventions that reduce the overall risk of cognitive decline for COVID-19 survivors.
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Hanson K, Brikci N, Erlangga D, Alebachew A, De Allegri M, Balabanova D, Blecher M, Cashin C, Esperato A, Hipgrave D, Kalisa I, Kurowski C, Meng Q, Morgan D, Mtei G, Nolte E, Onoka C, Powell-Jackson T, Roland M, Sadanandan R, Stenberg K, Vega Morales J, Wang H, Wurie H. The Lancet Global Health Commission on financing primary health care: putting people at the centre. Lancet Glob Health 2022; 10:e715-e772. [PMID: 35390342 PMCID: PMC9005653 DOI: 10.1016/s2214-109x(22)00005-5] [Citation(s) in RCA: 109] [Impact Index Per Article: 54.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 12/16/2021] [Accepted: 12/17/2021] [Indexed: 01/18/2023]
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Hoppe RT, Advani RH, Ai WZ, Ambinder RF, Armand P, Bello CM, Benitez CM, Chen W, Dabaja B, Daly ME, Gordon LI, Hansen N, Herrera AF, Hochberg EP, Johnston PB, Kaminski MS, Kelsey CR, Kenkre VP, Khan N, Lynch RC, Maddocks K, McConathy J, Metzger M, Morgan D, Mulroney C, Pullarkat ST, Rabinovitch R, Rosenspire KC, Seropian S, Tao R, Torka P, Winter JN, Yahalom J, Yang JC, Burns JL, Campbell M, Sundar H. NCCN Guidelines® Insights: Hodgkin Lymphoma, Version 2.2022. J Natl Compr Canc Netw 2022; 20:322-334. [PMID: 35390768 DOI: 10.6004/jnccn.2022.0021] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Hodgkin lymphoma (HL) is an uncommon malignancy of B-cell origin. Classical HL (cHL) and nodular lymphocyte-predominant HL are the 2 main types of HL. The cure rates for HL have increased so markedly with the advent of modern treatment options that overriding treatment considerations often relate to long-term toxicity. These NCCN Guidelines Insights discuss the recent updates to the NCCN Guidelines for HL focusing on (1) radiation therapy dose constraints in the management of patients with HL, and (2) the management of advanced-stage and relapsed or refractory cHL.
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Blake W, Morgan D. Impact of elective surgery restrictions on training, service to the community and public. AUSTRALASIAN JOURNAL OF PLASTIC SURGERY 2022. [DOI: 10.34239/ajops.v5n1.382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Whitmore TJ, Cheng V, Rawlins MD, Morgan D, Chang T, O'Halloran S, Dyer JR, Boan P, Roberts JA. Pharmacokinetics of valganciclovir and voriconazole during prolonged intermittent renal replacement therapy in a lung transplant recipient. Transpl Infect Dis 2022; 24:e13818. [PMID: 35238448 DOI: 10.1111/tid.13818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/04/2022] [Accepted: 02/13/2022] [Indexed: 11/28/2022]
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Hong C, Kamdar N, Morgan D. Prediction models for same-day discharge following benign minimally invasive hysterectomy. Am J Obstet Gynecol 2022. [DOI: 10.1016/j.ajog.2021.12.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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DeBlanc J, Brummett C, Gunaseelan V, As-Sanie S, Morgan D. Patient recovery and opioid use after hysterectomy. Am J Obstet Gynecol 2022. [DOI: 10.1016/j.ajog.2021.12.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Singhal S, Veeratterapillay J, Locks S, Morgan D, Patil R. Magnetic Resonance Imaging-Guided Adaptive Brachytherapy for the Treatment of Cervical Cancer and its Impact on Clinical Outcome. Clin Oncol (R Coll Radiol) 2022; 34:442-451. [DOI: 10.1016/j.clon.2022.01.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/22/2021] [Accepted: 01/19/2022] [Indexed: 12/24/2022]
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Waterman JL, Jayaraju U, Nadimi JK, Morgan D. Impact of COVID-19 on Key Performance Indicators of the National Hip Fracture Database and the Management of Hip Fracture Patients. Cureus 2021; 13:e20575. [PMID: 35103154 PMCID: PMC8776320 DOI: 10.7759/cureus.20575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/20/2021] [Indexed: 11/20/2022] Open
Abstract
Background: A hospital's performance regarding the management of hip fractures is based on six key performance indicators (KPIs) which are recorded onto the National Hip Fracture Database (NHFD). The aim of this study was to assess the overall impact of coronavirus disease 2019 (COVID-19) on the management and outcomes of hip fracture patients against a similar period in 2019 by utilizing the KPIs. Method: Retrospective data collection of hip fracture patients during a six-week (pre-COVID) period in 2019 and a six-week (COVID-19) period in a single orthopedic unit. The following parameters were compared; patient age, time to theater, surgeon operating time, total time in the operating room, time from ward to recovery, time from hospital presentation to theater, and total time from presentation to hospital discharge. Results: Some 38 patients in the pre-COVID-19 period vs. 27 patients with hip fractures in the COVID-19 period were included in the study. Time from diagnosis to theater and surgeon operating time were similar in both groups. The mean length of stay was 9.3 days vs. a mean of 31.34 days (p = 0.0004) in the COVID-19 and pre-COVID-19 groups respectively. A 30-day mortality was 22.2% (n = 6) in the COVID-19 group vs. 5.3% (n = 2) in the pre-COVID-19 group. Conclusion: Our study demonstrates that the combination of surgical stress and COVID-19 leads to higher mortality rates. Our hospital’s structural reorganization during the pandemic has shown progress in achieving important KPIs and improved short-term outcomes for hip fracture and trauma patients.
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Abstract
PURPOSE OF REVIEW The current understanding of the relationship of the microbiota to clinical manifestation in patients with primary immunodeficiency, specifically the inflammatory processes caused by or that result in microbial dysbiosis, and their potential therapeutic options in primary immunodeficiency diseases (PID), is the basis of this review. RECENT FINDINGS PIDs are heterogeneous diseases with variable presentations, genetic backgrounds, complications, and severity. The immune-mediators may be extrinsic, such as therapeutic regimens that patients are on, including immunoglobin, biologics, antibiotics and diet, or intrinsic, like cytokines, microRNA and microbiome. The microbiome in PID, in particular, appears to play a crucial role in helping the host's immune system maintain hemostatic control in the intestine. Many of the clinical manifestations and complications of PID may be attributed to inflammatory and immune dysregulatory processes connected to the imbalances of the diet-microbiota-host-immunity axis, as shown by data pointing to the loss of microbial diversity, dysbiosis, in PID. SUMMARY The gut microbiome is a promising area of study in PID. Although the connection of the microbiome to humoral immunodeficiency is evident, the possibility of utilizing the association of humoral and cellular immunodeficiency and the microbiome for therapeutic benefit is still under investigation.
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Go RS, Jacobsen E, Baiocchi R, Buhtoiarov I, Butler EB, Campbell PK, Coulter DW, Diamond E, Flagg A, Goodman AM, Goyal G, Gratzinger D, Hendrie PC, Higman M, Hogarty MD, Janku F, Karmali R, Morgan D, Raldow AC, Stefanovic A, Tantravahi SK, Walkovich K, Zhang L, Bergman MA, Darlow SD. Histiocytic Neoplasms, Version 2.2021, NCCN Clinical Practice Guidelines in Oncology. J Natl Compr Canc Netw 2021; 19:1277-1303. [PMID: 34781268 DOI: 10.6004/jnccn.2021.0053] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Histiocytic neoplasms are rare hematologic disorders accounting for less than 1% of cancers of the soft tissue and lymph nodes. Clinical presentation and prognosis of these disorders can be highly variable, leading to challenges for diagnosis and optimal management of these patients. Treatment often consists of systemic therapy, and recent studies support use of targeted therapies for patients with these disorders. Observation ("watch and wait") may be sufficient for select patients with mild disease. These NCCN Guidelines for Histiocytic Neoplasms include recommendations for diagnosis and treatment of adults with the most common histiocytic disorders: Langerhans cell histiocytosis, Erdheim-Chester disease, and Rosai-Dorfman disease.
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Moeini B, Linford MR, Fairley N, Barlow A, Cumpson P, Morgan D, Fernandez V, Baltrusaitis J. Definition of a new (Doniach‐Sunjic‐Shirley) peak shape for fitting asymmetric signals applied to reduced graphene oxide/graphene oxide XPS spectra. SURF INTERFACE ANAL 2021. [DOI: 10.1002/sia.7021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Desai MA, Sethi TK, Yenamandra AK, Morgan D, Thompson MA, Reddy NM, Kovach AE. Primary sinonasal large B cell lymphoma is as histopathologically heterogeneous as systemic large B cell lymphoma but may show subtype-specific tropism for specific sinonasal anatomic sites. J Hematop 2021. [DOI: 10.1007/s12308-021-00473-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Waterman J, Jayaraju U, Nadimi J, Morgan D. 940 Neck of Femur Fracture Management and Outcomes during COVID-19: Overview of the Results from a District General Hospital in Wales. Br J Surg 2021. [PMCID: PMC8524569 DOI: 10.1093/bjs/znab259.1015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Introduction The COVID-19 pandemic has delivered significant challenges to the Orthopaedic community. Our study aims to assess the impact of COVID-19 on the management and outcomes of patient’s presenting with Hip Fractures to our DGH. Method Retrospective data analysis was performed on a cohort of hip fracture patients who presented to our DGH before the COVID-19 pandemic (23/03/2019 to 05/05/2019) and were compared to those who presented during the COVID-19 pandemic (23/03/2020 to 05/05/2020). Minimum follow up was 30 days postoperatively. Results 38 patients with hip fractures presented to our unit in the pre-COVID-19 period compared to 27 patients in the COVID-19 period. Total time from presentation to discharge, during COVID-19, demonstrated a 70.23% decrease when compared to the pre-COVID cohort. 30-day Mortality rates were higher in the COVID-19 cohort. Conclusions During the COVID-19 pandemic our time to theatre and discharge of hip fractures has seen an improvement, with time to discharge decreasing by 70.23%. Comparison of our mortality rates has seen a fourfold increase likely influenced by the detrimental effects of COVID-19. Further work and larger numbers are required to see the true impact of COVID-19 on the management and outcomes of hip fractures in our DGH.
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Rimkus GG, Schubert M, Morgan D, Jungjohann S. Rapid direct analysis of retinyl palmitate (vitamin A) in fortified vegetable oils by HPLC-FLD. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 39:24-34. [PMID: 34587464 DOI: 10.1080/19440049.2021.1977854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Large-scale food fortification of vegetable oils with vitamin A has been implemented successfully for decades in numerous African and Asian countries, contributing demonstrably to reductions in vitamin A deficiency. For these programmes, reliable and validated analytical data are essential to demonstrate compliance with legal standards and fortification levels. Commonly, many analytical laboratories use a saponification method for the quantitative analysis of retinyl palmitate (the mostly used form of vitamin A for fortification) in fortified oils, which implies a multiple-step procedure with long analysis times and the potential risk of analyte loss. The aim of the present study was to develop and validate a direct High-performance Liquid Chromatography (HPLC) method that reduces these sample preparation steps, leading to the cost- and time-efficient quantification of retinyl palmitate in fortified oils. Oil samples are dissolved into the HPLC solvents, then injected directly into a common C18 column, and subsequently detected by a fluorescence detector. The limit of quantification (1.0 mg retinyl palmitate kg-1) and the working range of 1.0-100 mg retinyl palmitate kg-1 with a linearity of R2 = 0.9989 are appropriate to analyse fortified oil samples. The method also showed adequate precision (RSD between 1.1% and 3.1%) and recoveries (86-103%) at two different concentration levels. The accuracy of the direct HPLC method was additionally proven by the comparison of spiked samples with two external laboratories that used the saponification method. The robustness of the method was confirmed by the analysis of various spiked edible oils. The HPLC column is not deteriorated by the lipid matrix and shows excellent stability and long lifetime. Also, 9-cis-retinyl palmitate formed mainly by light exposure could be detected by this method. The direct HPLC method is a well-suited alternative to the saponification method for the rapid and reliable routine analysis of fortified oil samples.
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Song G, Yang H, Shen N, Pham P, Brown B, Lin X, Hong Y, Sinu P, Cai J, Li X, Leon M, Gordon MN, Morgan D, Zhang S, Cao C. An Immunomodulatory Therapeutic Vaccine Targeting Oligomeric Amyloid-β. J Alzheimers Dis 2021; 77:1639-1653. [PMID: 32925044 DOI: 10.3233/jad-200413] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Aging is considered the most important risk factor for Alzheimer's disease (AD). Recent research supports the theory that immunotherapy targeting the "oligomeric" forms of amyloid-β (Aβ) may halt the progression of AD. However, previous clinical trial of the vaccine against Aβ, called AN1792, was suspended due to cases of meningoencephalitis in patients. OBJECTIVE To develop a peptide sensitized dendritic cells (DCs) vaccine that would target oligomer Aβ and prevent an autoimmune response. METHODS Double transgenic APPswe/PS1ΔE9 (Tg) and C57BL/6J control mice were used in this study. Cytokine expression profile detection, characterization of antisera, brain GSK-3β, LC3 expression, and spatial working memory testing before and post-vaccination were obtained. RESULTS Epitope prediction indicated that E22W42 could generate 13 new T cell epitopes which can strengthen immunity in aged subjects and silence several T cell epitopes of the wild type Aβ. The silenced T cell epitope could help avoid the autoimmune response that was seen in some patients of the AN-1792 vaccine. The E22W42 not only helped sensitize bone marrow-derived DCs for the development of an oligomeric Aβ-specific antibody, but also delayed memory impairment in the APP/PS1 mouse model. Most importantly, this E22W42 peptide will not alter the DC's natural immunomodulatory properties. CONCLUSION The E22W42 vaccine is possibly safer for patients with impaired immune systems. Since there is increasing evidence that oligomeric form of Aβ are the toxic species to neurons, the E22W42 antibody's specificity for these "oligomeric" Aβ species could provide the opportunity to produce some clinical benefits in AD subjects.
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Cho J, Park SK, Kwon OS, La Salle DT, Cerbie J, Fermoyle CC, Morgan D, Nelson A, Bledsoe A, P Bharath L, Tandar M, Kunapuli SP, Richardson R, Anandh Babu PV, Mookherjee S, Kishore BK, Wang F, Yang T, Boudina S, Trinity JD, Symons JDD. Abstract MP26: Activating P2Y
1
Receptors Improves Function In Arteries With Repressed Autophagy. Arterioscler Thromb Vasc Biol 2021. [DOI: 10.1161/atvb.41.suppl_1.mp26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective:
The importance of endothelial cell (EC) autophagy to vascular homeostasis is evolving. Earlier we reported that purinergic 2Y
1
receptor (P2Y
1
-R) activation rejuvenates shear-stress induced nitric oxide (NO) generation in bovine aortic endothelial cells that is otherwise compromised after pharmacological and genetic autophagy repression. Here we determined the translational and functional relevance of these findings.
Approach and Results:
First we assessed translational relevance using older humans and mice that exhibit blunted EC autophagy at rest together with impaired arterial function vs. appropriate controls. Rhythmic handgrip exercise elevated radial artery shear rate similarly in adult and older males for 60-min. Compared to baseline, autophagy initiation, p-eNOS
S1177
activation, and NO generation, occurred in radial artery ECs from adult but not older subjects.Regarding mice, indexes of autophagy and p-eNOS
S1177
activation were robust in ECs from adult but not older mice in response to 60-min treadmill-running. Next we questioned whether an inability to initiate EC autophagy precipitates arterial dysfunction. Age-associated reductions in intraluminal flow-mediated vasodilation observed in older vs. adult mice were recapitulated in arteries from adult mice by : (i) NO synthase inhibition; (ii) autophagy impairment using 3-methyladenine (3-MA); (iii) EC Atg3 depletion (iecAtg3KO mice); (iv) P2Y
1
-R blockade; and (v) germline depletion of P2Y
1
-Rs. Importantly, P2Y
1
-R activation using 2-methylthio-ADP (2-Me-ADP) improved vasodilatory capacity in arteries from : (i) adult mice treated with 3-MA; (ii) adult iecAtg3KO mice; and (iii) older animals with repressed EC autophagy.
Conclusions:
Arterial dysfunction concurrent with pharmacological, genetic, and age-associated EC autophagy compromise is improved by activating P2Y
1
-Rs.
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Finneran DJ, Njoku IP, Flores-Pazarin D, Ranabothu MR, Nash KR, Morgan D, Gordon MN. Toward Development of Neuron Specific Transduction After Systemic Delivery of Viral Vectors. Front Neurol 2021; 12:685802. [PMID: 34512509 PMCID: PMC8426581 DOI: 10.3389/fneur.2021.685802] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/15/2021] [Indexed: 11/13/2022] Open
Abstract
Widespread transduction of the CNS with a single, non-invasive systemic injection of adeno-associated virus is now possible due to the creation of blood-brain barrier-permeable capsids. However, as these capsids are mutants of AAV9, they do not have specific neuronal tropism. Therefore, it is necessary to use genetic tools to restrict expression of the transgene to neuronal tissues. Here we compare the strength and specificity of two neuron-specific promoters, human synapsin 1 and mouse calmodulin/calcium dependent kinase II, to the ubiquitous CAG promoter. Administration of a high titer of virus is necessary for widespread CNS transduction. We observed the neuron-specific promoters drive comparable overall expression in the brain to the CAG promoter. Furthermore, the neuron-specific promoters confer significantly less transgene expression in peripheral tissues compared with the CAG promoter. Future experiments will utilize these delivery platforms to over-express the Alzheimer-associated pathological proteins amyloid-beta and tau to create mouse models without transgenesis.
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