Research Square最新文献

筛选
英文 中文
Faster Club Hockey Athletes Have Reduced Upper Leg Muscular Co-contraction During Maximal-Speed Sprinting 速度更快的俱乐部曲棍球运动员在最大速度冲刺时上肢肌肉协同收缩减少
Research Square Pub Date : 2024-05-07 DOI: 10.21203/rs.3.rs-4283161/v1
Jason Williams, Joseph C. Watso
{"title":"Faster Club Hockey Athletes Have Reduced Upper Leg Muscular Co-contraction During Maximal-Speed Sprinting","authors":"Jason Williams, Joseph C. Watso","doi":"10.21203/rs.3.rs-4283161/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4283161/v1","url":null,"abstract":"Abstract Background Most electromyographic (EMG) data for muscular activation patterns during ambulation is limited to older adults with existing chronic disease(s) walking at slow velocities. However, we know much less about the lower extremity muscle co-contraction patterns during sprinting and its relation to running velocity (i.e., performance). Therefore, we compared lower extremity muscular activation patterns during sprinting between slower and faster collegiate club hockey athletes. We hypothesized that faster athletes would have lower EMG-assessed co-contraction index (CCI) values in the lower extremities during over-ground sprinting. Results Twenty-two males (age = 21[1] yrs (median[IQR]); body mass = 77.1 ± 8.6 kg (mean ± SD)) completed two 20-m over-ground sprints with concomitant EMG and asynchronous force plate testing. We split participants using median running velocity (FAST: 8.5 ± 0.3 vs. SLOW: 7.7 ± 0.3 Conclusions m/s, p  < 0.001). Faster athletes had lower CCI between the rectus femoris and biceps femoris (group: p  = 0.05), particularly during the late swing phase of the gait cycle (post hoc p  = 0.02). In agreement with our hypothesis, we found lower CCI values in the upper leg musculature during maximal-speed over-ground sprinting. These data from collegiate club hockey athletes corroborate other reports in clinical populations that the coordination between the rectus femoris and biceps femoris is associated with linear over-ground sprinting velocity.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141005349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fecal Carriage of Multidrug-Resistant Organisms Increases the Risk of Hepatic Encephalopathy in Cirrhotic Patients: Insights from Gut Microbiota and Metabolite Features 耐多药生物体的粪便携带会增加肝硬化患者发生肝性脑病的风险:从肠道微生物群和代谢物特征中窥见一斑
Research Square Pub Date : 2024-05-07 DOI: 10.21203/rs.3.rs-4328129/v1
Peishan Wu, Pei-Chang Lee, Tien-En Chang, Y. Hsieh, Jen-Jie Chiou, Chao-Hsiung Lin, Yi-Long Huang, Yi-Tsung Lin, Teh-Ia Huo, Bernd Schnabl, Kuei-Chuan Lee, Ming-Chih Hou
{"title":"Fecal Carriage of Multidrug-Resistant Organisms Increases the Risk of Hepatic Encephalopathy in Cirrhotic Patients: Insights from Gut Microbiota and Metabolite Features","authors":"Peishan Wu, Pei-Chang Lee, Tien-En Chang, Y. Hsieh, Jen-Jie Chiou, Chao-Hsiung Lin, Yi-Long Huang, Yi-Tsung Lin, Teh-Ia Huo, Bernd Schnabl, Kuei-Chuan Lee, Ming-Chih Hou","doi":"10.21203/rs.3.rs-4328129/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4328129/v1","url":null,"abstract":"Abstract Background Impact of fecal colonization by multidrug-resistant organisms (MDROs) on changes in gut microbiota and associated metabolites, as well as its role in cirrhosis-associated outcomes, has not been thoroughly investigated. Methods Eighty-eight cirrhotic patients and 22 healthy volunteers were prospectively enrolled with analysis conducted on plasma metabolites, fecal MDROs, and microbiota. Patients were followed for a minimum of one year. Predictive factors for cirrhosis-associated outcomes were identified using Cox proportional hazards regression models, and risk factors for fecal MDRO carriage were assessed using logistic regression model. Correlations between microbiota and metabolic profiles were evaluated through Spearman's rank test. Results Twenty-nine (33%) cirrhotic patients exhibited MDRO carriage, with a notably higher rate of hepatic encephalopathy (HE) in MDRO carriers (20.7% vs. 3.2%, p  = 0.008). Cox regression analysis identified higher serum lipopolysaccharide levels and fecal MDRO carriage as predictors for HE development. Logistic regression analysis showed that MDRO carriage is an independent risk factor for developing HE. Microbiota analysis showed a significant dissimilarity of fecal microbiota between cirrhotic patients with and without MDRO carriage ( p  = 0.033). Thirty-two metabolites exhibiting significantly different expression levels among healthy controls, cirrhotic patients with and without MDRO carriage were identified. Six of the metabolites showed correlation with specific bacterial taxa expression in MDRO carriers, with isoaustin showing significantly higher levels in MDRO carriers experiencing HE compared to those who did not. Conclusion Fecal MDRO carriage is associated with altered gut microbiota, metabolite modulation, and an elevated risk of HE occurrence within a year.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141002599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Personality and Self-efficacy for Illness Management in Cancer 癌症患者的个性和疾病管理自我效能感
Research Square Pub Date : 2024-05-07 DOI: 10.21203/rs.3.rs-4289523/v1
Tristen Peyser, Laura M. Perry, Brenna Mossman, Kenneth Xu, Seowoo Kim, James B. Moran, Michael Hoerger
{"title":"Personality and Self-efficacy for Illness Management in Cancer","authors":"Tristen Peyser, Laura M. Perry, Brenna Mossman, Kenneth Xu, Seowoo Kim, James B. Moran, Michael Hoerger","doi":"10.21203/rs.3.rs-4289523/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4289523/v1","url":null,"abstract":"Abstract Objectives Self-efficacy for illness management is increasingly recognized as important for outcomes in cancer. We examined whether The Big Five personality dimensions were associated with self-efficacy for illness management and hypothesized that patients who were less neurotic and more conscientious would have better self-efficacy. Methods Adults with cancer completed a cross-sectional survey that included the Mini-International Personality Item Pool (IPIP) and three subscales of the Patient-Reported Outcomes Measurement Information System (PROMIS) Self-Efficacy for Chronic Conditions: managing emotions, managing symptoms, and managing treatment and medication. Linear regressions were used to test the hypotheses, while controlling for covariates. Results The personality and PROMIS self-efficacy measures demonstrated good evidence of reliability (median Cronbach’s alpha = .78, range of .69-.92) and validity (intercorrelations). As hypothesized, patients who were less neurotic or more conscientious had higher levels of illness self-efficacy overall and on each of the three subscales (all p s < .001). Openness was associated with better self-management of symptoms ( p  = .013) and emotions ( p  = .040). Extraversion was associated with better self-management of emotions ( p  = .024). Conclusions Personality plays a vital role in illness self-efficacy for patients with cancer. Practice Implications: As a part of multidisciplinary care teams, psychosocial experts can use these findings to help patients better manage their illness.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141002206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deep brain stimulation of the subthalamic nucleus for Parkinson’s disease: A network imaging marker of the treatment response 眼下核深部脑刺激治疗帕金森病:治疗反应的网络成像标记
Research Square Pub Date : 2024-05-07 DOI: 10.21203/rs.3.rs-4178280/v1
Prashin Unadkat, An Vo, Yilong Ma, Shichun Peng, Nha Nguyen, M. Niethammer, Chris C. Tang, V. Dhawan, Ritesh Ramdhani, Albert Fenoy, S. Caminiti, Daniela Perani, D. Eidelberg
{"title":"Deep brain stimulation of the subthalamic nucleus for Parkinson’s disease: A network imaging marker of the treatment response","authors":"Prashin Unadkat, An Vo, Yilong Ma, Shichun Peng, Nha Nguyen, M. Niethammer, Chris C. Tang, V. Dhawan, Ritesh Ramdhani, Albert Fenoy, S. Caminiti, Daniela Perani, D. Eidelberg","doi":"10.21203/rs.3.rs-4178280/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4178280/v1","url":null,"abstract":"Abstract Subthalamic nucleus deep brain stimulation (STN-DBS) alleviates motor symptoms of Parkinson’s disease (PD), thereby improving quality of life. However, quantitative brain markers to evaluate DBS responses and select suitable patients for surgery are lacking. Here, we used metabolic brain imaging to identify a reproducible STN-DBS network for which individual expression levels increased with stimulation in proportion to motor benefit. Of note, measurements of network expression from metabolic and BOLD imaging obtained preoperatively predicted motor outcomes determined after DBS surgery. Based on these findings, we computed network expression in 175 PD patients, with time from diagnosis ranging from 0 to 21 years, and used the resulting data to predict the outcome of a potential STN-DBS procedure. While minimal benefit was predicted for patients with early disease, the proportion of potential responders increased after 4 years. Clinically meaningful improvement with stimulation was predicted in 18.9 – 27.3% of patients depending on disease duration.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141004369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Clinical Trauma Severity of Indoor and Outdoor Injurious Falls Requiring Emergency Medical Service Response 需要紧急医疗服务响应的室内和室外伤害性跌倒的临床创伤严重程度
Research Square Pub Date : 2024-05-07 DOI: 10.21203/rs.3.rs-4202941/v1
Kathryn G. Burford, Nicole G. Itzkowitz, R. Crowe, Henry E. Wang, Alexander X Lo, Andrew G. Rundle
{"title":"Clinical Trauma Severity of Indoor and Outdoor Injurious Falls Requiring Emergency Medical Service Response","authors":"Kathryn G. Burford, Nicole G. Itzkowitz, R. Crowe, Henry E. Wang, Alexander X Lo, Andrew G. Rundle","doi":"10.21203/rs.3.rs-4202941/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4202941/v1","url":null,"abstract":"Abstract Background : Injurious falls represent a significant public health burden. Research and polices have primarily focused on falls occurring indoors despite evidence that outdoor falls account for 47-58% of all falls requiring some medical attention. This study compared the clinical trauma severity of indoor versus outdoor injurious falls requiring Emergency Medical Services (EMS) response. Methods: Using the 2019 National Emergency Medical Services Information System (NEMSIS) dataset, we identified the location of patients injured from falls that required EMS response. We classified injury severity using 1) the Revised Trauma Score for Triage (T-RTS): ≤ 11 indicated the need for transport to a Trauma Center; 2) Glasgow Coma Scale (GCS): ≤8 and 9–12 indicated moderate and severe neurologic injury; and 3) patient clinical acuity by EMS: Dead, Critical, Emergent, Low. Results : Of 1,854,909 encounters for patients with injurious falls, the vast majority occurred indoors ( n =1,596,860) compared to outdoors ( n =152,994). The proportions of patients with moderate or severe GCS scores, were comparable between those with indoor falls (3.0%) and with outdoor falls on streets or sidewalks (3.8%), T-RTS scores indicating need for transport to a Trauma Center (5.2% vs 5.9%) and EMS acuity rated as Emergent or Critical (27.7% vs 27.1%).Injurious falls were more severe among male patients compared to females: and males injured by falling on streets or sidewalks had higher percentages for moderate or severe GCS scores (4.8% vs 3.6%) and T-RTS scores indicating the need for transport to a Trauma Center (7.3% vs 6.5%) compared to indoor falls. Young and middle-aged patients whose injurious falls occurred on streets or sidewalks were more likely to have a T-RTS score indicating the need for Trauma Center care compared to indoor falls among this subgroup. Yet older patients injured by falling indoors were more likely to have a T-RTS score indicating the need for Trauma Center than older patients who fell on streets or sidewalks. Conclusions : There was a similar proportion of patients with severe injurious falls that occurred indoors and on streets or sidewalks. These findings suggest the need to determine outdoor environmental risks for outdoor falls to support location-specific interventions.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141005393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gene Amplification of Mediator Subunit 30 Redirects the MYC Transcriptional Program and Oncogenesis 介质亚基 30 的基因扩增可重定向 MYC 转录程序和肿瘤发生
Research Square Pub Date : 2024-05-06 DOI: 10.21203/rs.3.rs-4326418/v1
Chunyu Jin, Linjie Zhao, Guofeng Zhao, Yujia Liu, Wubin Ma, Shenghong Ma, Likun Yao, Yuan Liu, Qiulian Wu, Huairui Yuan, Kailin Yang, K. Ohgi, Jeremy N. Rich, Michael G. Rosenfeld
{"title":"Gene Amplification of Mediator Subunit 30 Redirects the MYC Transcriptional Program and Oncogenesis","authors":"Chunyu Jin, Linjie Zhao, Guofeng Zhao, Yujia Liu, Wubin Ma, Shenghong Ma, Likun Yao, Yuan Liu, Qiulian Wu, Huairui Yuan, Kailin Yang, K. Ohgi, Jeremy N. Rich, Michael G. Rosenfeld","doi":"10.21203/rs.3.rs-4326418/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4326418/v1","url":null,"abstract":"Abstract Understanding the molecular mechanisms underlying tumorigenesis is crucial for developing effective cancer therapies. Here, we investigate the co-amplification of MED30 and MYC across diverse cancer types and its impact on oncogenic transcriptional programs. Transcriptional profiling of MYC and MED30 single or both overexpression/amplification revealed the over amount of MED30 lead MYC to a new transcriptional program that associate with poor prognosis. Mechanistically, MED30 overexpression/amplification recruits other Mediator components and binding of MYC to a small subset of novel genomic regulatory sites, changing the epigenetic marks and inducing the formation of new enhancers, which drive the expression of target genes crucial for cancer progression. In vivo studies in pancreatic ductal adenocarcinoma (PDAC) further validate the oncogenic potential of MED30, as its overexpression promotes tumor growth and can be attenuated by knockdown of MYC. Using another cancer type as an example, MED30 knockdown reduces tumor growth particularly in MYC high-expressed glioblastoma (GBM) cell lines. Overall, our study elucidates the critical role of MED30 overexpression in orchestrating oncogenic transcriptional programs and highlights its potential as a therapeutic target for MYC-amplified cancer.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141010381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oral 8-aminoguanine against age-related retinal degeneration 口服 8-氨基鸟嘌呤防治老年性视网膜变性
Research Square Pub Date : 2024-05-06 DOI: 10.21203/rs.3.rs-4022389/v1
Yuanyuan Chen, Abhishek Vats, Yibo Xi, Amanda Wolf-Johnston, Owen D. Clinger, Riley K. Arbuckle, Chase D. Dermond, Jonathan Li, Donna Stolze, J. Sahel, Edwin Jackson, Lori Birder
{"title":"Oral 8-aminoguanine against age-related retinal degeneration","authors":"Yuanyuan Chen, Abhishek Vats, Yibo Xi, Amanda Wolf-Johnston, Owen D. Clinger, Riley K. Arbuckle, Chase D. Dermond, Jonathan Li, Donna Stolze, J. Sahel, Edwin Jackson, Lori Birder","doi":"10.21203/rs.3.rs-4022389/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4022389/v1","url":null,"abstract":"Abstract Visual decline in the elderly is often attributed to retinal aging, which predisposes the tissue to pathologies such as age-related macular degeneration. Currently, effective oral pharmacological interventions for retinal degeneration are limited. We present a novel oral intervention, 8-aminoguanine (8-AG), targeting age-related retinal degeneration, utilizing the aged Fischer 344 rat model. A low-dose 8-AG regimen (5 mg/kg body weight) via drinking water, beginning at 22 months for 8 weeks, demonstrated significant retinal preservation. This was evidenced by increased retinal thickness, improved photoreceptor integrity, and enhanced electroretinogram responses. 8-AG effectively reduced apoptosis, oxidative damage, and microglial/macrophage activation associated with aging retinae. Age-induced alterations in the retinal purine metabolome, characterized by elevated levels of inosine, hypoxanthine, and xanthine, were partially mitigated by 8-AG. Transcriptomics highlighted 8-AG's anti-inflammatory effects on innate and adaptive immune responses. Extended treatment to 17 weeks further amplified the retinal protective effects. Moreover, 8-AG showed temporary protective effects in the Rho P23H/+ mouse model of retinitis pigmentosa, reducing active microglia/macrophages. Our study positions 8-AG as a promising oral agent against retinal aging. Coupled with previous findings in diverse disease models, 8-AG emerges as a promising anti-aging compound with the capability to reverse common aging hallmarks.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141007555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cystatin M/E ameliorates bone resorption through increasing osteoclastic cell estrogen influx 胱抑素 M/E 通过增加破骨细胞雌激素流入量改善骨吸收
Research Square Pub Date : 2024-05-06 DOI: 10.21203/rs.3.rs-4313179/v1
Jin-Ran Chen, Dongzheng Gai, Perry C Caviness, Oxana P. Lazarenko, Jennifer F. Chen, Christopher E Randolph, Zijun Zhang, Yan Cheng, Fumou Sun, Hongwei Xu, Michael Blackburn, Guido J Tricot, John D. Shaughnessy, Fenghuang Zhan
{"title":"Cystatin M/E ameliorates bone resorption through increasing osteoclastic cell estrogen influx","authors":"Jin-Ran Chen, Dongzheng Gai, Perry C Caviness, Oxana P. Lazarenko, Jennifer F. Chen, Christopher E Randolph, Zijun Zhang, Yan Cheng, Fumou Sun, Hongwei Xu, Michael Blackburn, Guido J Tricot, John D. Shaughnessy, Fenghuang Zhan","doi":"10.21203/rs.3.rs-4313179/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4313179/v1","url":null,"abstract":"Abstract In multiple myeloma (MM), increased osteoclast differentiation leads to the formation of osteolytic lesions in most MM patients. Bisphosphonates, such as zoledronic acid (ZA), are used to ameliorate bone resorption, but due to risk of serious side effects as well as the lack of repair of existing lesions, novel anti-bone resorption agents are required. Previously, the absence of osteolytic lesions in MM was strongly associated with elevated levels of cystatin M/E (CST6), a cysteine protease inhibitor, secreted by MM cells. In this study, both MM- and ovariectomy (OVX)-induced osteoporotic mouse models were used to compare the effects of recombinant mouse CST6 (rmCst6) and ZA on preventing bone loss. µCT showed that rmCst6 and ZA had similar effects on improving percent bone volume, and inhibited differentiation of non-adherent bone marrow cells into mature osteoclasts. Single-cell RNA sequencing showed that rmCst6 and not ZA treatment reduced bone marrow macrophage percentage in the MM mouse model compared to controls. Protein and mRNA arrays showed that both rmCst6 and ZA significantly inhibit OVX-induced expression of inflammatory cytokines. For OVX mice, ERα protein expression in bone was brought to sham surgery level by only rmCst6 treatments. rmCst6 significantly increased mRNA and protein levels of ERα and significantly increased total intracellular estrogen concentrations for ex vivo osteoclast precursor cell cultures. Based on these results, we conclude that CST6 improves MM or OVX bone loss models by increasing the expression of estrogen receptors as well as the intracellular estrogen concentration in osteoclast precursors, inhibiting their maturation.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141010910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Biopreservation and Reversal of Oxidative Injury During Blood Storage by a Novel Curcumin-based Gel Formulation 基于姜黄素的新型凝胶制剂在血液储存过程中的生物保存和氧化损伤逆转
Research Square Pub Date : 2024-05-06 DOI: 10.21203/rs.3.rs-4277591/v1
Wayne Hicks, S. Jana, Tigist Kassa, Richard Prince, Pedro Cabrales, Joel Friedman, A. Alayash
{"title":"Biopreservation and Reversal of Oxidative Injury During Blood Storage by a Novel Curcumin-based Gel Formulation","authors":"Wayne Hicks, S. Jana, Tigist Kassa, Richard Prince, Pedro Cabrales, Joel Friedman, A. Alayash","doi":"10.21203/rs.3.rs-4277591/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4277591/v1","url":null,"abstract":"Abstract Blood storage lesion induces cytosolic and membrane changes driven in part by hemoglobin (Hb) oxidation reactions within red blood cells (RBCs). A novel gel formulation containing the antioxidant curcuminoids in a biocompatible solvent system was used to deliver curcumin into RBCs. Incubation of peroxide treated RBCs stored in PBS with curcumin gel led to a reduction in prooxidant ferrylHb and recovery in ATP. Curcumin treatment prevented band 3 tyrosine (Y359 and Y21) phosphorylation. RBCs stored in AS-3 solutions for 28, 35, 42 and 49 days, following a single-dose of 100µM curcuminoids at each time points, caused reduction in protein carbonylation and considerable recovery in ATP levels. Proteomic analysis revealed minimal changes in the proteomic landscape in 35 days. However, a downregulation in fibrinogen was observed in the treated samples which may reduce RBC aggregation. Additionally, we used a guinea pig model where the circulation of infused aged RBCs can be extended (approximately 10%) when treated with curcumin gel at the start of storage. Our data therefore provide mechanistic insights and supportive animal data into benefits of treating stored RBCs with a novel curcuminoid formulation based on the biopreservation of RBC membrane integrity, redox balance, and increased longevity in circulation.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141008191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Renalase Levels are Decreased in Maternal Blood and Placental Tissues in Pregnancies Associated with Preterm Preeclampsia 先兆子痫孕妇血液和胎盘组织中的肾酶水平降低
Research Square Pub Date : 2024-05-06 DOI: 10.21203/rs.3.rs-4319658/v1
Youstina Soliman*, Chino Eke, Xiaojia Guo, Melinda Wang, Tatiana Silva, Gary V. Désir, Liza Konnikova
{"title":"Renalase Levels are Decreased in Maternal Blood and Placental Tissues in Pregnancies Associated with Preterm Preeclampsia","authors":"Youstina Soliman*, Chino Eke, Xiaojia Guo, Melinda Wang, Tatiana Silva, Gary V. Désir, Liza Konnikova","doi":"10.21203/rs.3.rs-4319658/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-4319658/v1","url":null,"abstract":"Abstract Preeclampsia (PEC) is a complication of pregnancy associated with hypertension and the risk of eclampsia. The pathophysiology of PEC is unknown and identifying factors associated with PEC during pregnancy is crucial for placental, fetal, and maternal health. Renalase (RNLS) is an anti-inflammatory secretory flavoprotein associated with hypertension. Recent data demonstrated a correlation between maternal serum RNLS and PEC, and work from our group identified RNLS expression in the placenta. However, it remains unknown whether RNLS levels in placenta are altered by preeclampsia. Additionally, it is unclear if there is a differential effect of preterm and term PEC on RNLS. We demonstrate that serum RNLS was reduced in preterm cases of PEC. Similarly, placental RNLS was diminished in the chorion of preterm cases of PEC. However, a reduction of RNLS in the decidua was observed with all cases of PEC, while the levels of RNLS within the placental villi were similar in all cases. Overall, we demonstrate that RNLS correlates with PEC both systemically in maternal serum and locally within the placenta, with variable effects on the different layers of the placenta and more pronounced in preterm cases.","PeriodicalId":21039,"journal":{"name":"Research Square","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141005922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信