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1.
J Oncol Pharm Pract ; 30(1): 4-8, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36946143

RESUMO

INTRODUCTION: Peripherally acting µ-opioid receptor antagonists (PAMORAs) are used in the treatment of opioid induced constipation without impacting the actions of opioid analgesics. Subcutaneous methylnaltrexone was one of the first PAMORAs approved in April 2008 for the treatment of opioid induced constipation in adult patients. The safety and effectiveness of methylnaltrexone has not been established in pediatric patients. In this study, the use of subcutaneous methylnaltrexone in pediatric patients is analyzed and reviewed. The primary outcome is occurrence of a bowel movement within 24 h after methylnaltrexone (MNTX) administration and the number of bowel movements following treatment with methylnaltrexone. Secondary outcomes include safety in this patient cohort. METHODS: This is a retrospective study of 79 pediatric patients with opioid induced constipation. Patients were administered methylnaltrexone during their inpatient stay. Data on bowel activity after methylnaltrexone was obtained from the hospital information system. RESULTS: Out of the 79 patients who received methylnaltrexone, there were seven patients from whom data could not be analyzed. Of the 72 patients whose data was available, 38% (N = 27) were documented as having a bowel movement, 62% (N = 45) did not have a bowel movement. Reported adverse events were minimal with nausea (N = 3), vomiting (N = 1), and flatulence (N = 6). CONCLUSION: Methylnaltrexone appears safe in the pediatric population and produces bowel movements in more than a third of pediatric patients. It is a feasible and safe option for opioid induced constipation in pediatric patients.


Assuntos
Naltrexona/análogos & derivados , Neoplasias , Constipação Induzida por Opioides , Adulto , Humanos , Criança , Analgésicos Opioides/efeitos adversos , Constipação Induzida por Opioides/tratamento farmacológico , Estudos Retrospectivos , Constipação Intestinal/induzido quimicamente , Constipação Intestinal/tratamento farmacológico , Antagonistas de Entorpecentes/efeitos adversos , Neoplasias/tratamento farmacológico , Compostos de Amônio Quaternário
2.
J Neurosci ; 44(5)2024 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-38050105

RESUMO

Alzheimer's disease patients and mouse models exhibit aberrant neuronal activity and altered excitatory-to-inhibitory synaptic ratio. Using multicolor two-photon microscopy, we test how amyloid pathology alters the structural dynamics of excitatory and inhibitory synapses and their adaptation to altered visual experience in vivo in the visual cortex. We show that the baseline dynamics of mature excitatory synapses and their adaptation to visual deprivation are not altered in amyloidosis. Likewise, the baseline dynamics of inhibitory synapses are not affected. In contrast, visual deprivation fails to induce inhibitory synapse loss in amyloidosis, a phenomenon observed in nonpathological conditions. Intriguingly, inhibitory synapse loss associated with visual deprivation in nonpathological mice is accompanied by subtle broadening of spontaneous but not visually evoked calcium transients. However, such broadening does not manifest in the context of amyloidosis. We also show that excitatory and inhibitory synapse loss is locally clustered under the nonpathological state. In contrast, a fraction of synapse loss is not locally clustered in amyloidosis, indicating an impairment in inhibitory synapse adaptation to changes in excitatory synaptic activity.


Assuntos
Doença de Alzheimer , Amiloidose , Camundongos , Humanos , Animais , Neurônios/fisiologia , Sinapses/fisiologia , Plasticidade Neuronal/fisiologia
3.
Brain ; 147(5): 1710-1725, 2024 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-38146639

RESUMO

Mitochondrial dysfunction is an early pathological feature of Alzheimer disease and plays a crucial role in the development and progression of Alzheimer's disease. Strategies to rescue mitochondrial function and cognition remain to be explored. Cyclophilin D (CypD), the peptidylprolyl isomerase F (PPIase), is a key component in opening the mitochondrial membrane permeability transition pore, leading to mitochondrial dysfunction and cell death. Blocking membrane permeability transition pore opening by inhibiting CypD activity is a promising therapeutic approach for Alzheimer's disease. However, there is currently no effective CypD inhibitor for Alzheimer's disease, with previous candidates demonstrating high toxicity, poor ability to cross the blood-brain barrier, compromised biocompatibility and low selectivity. Here, we report a new class of non-toxic and biocompatible CypD inhibitor, ebselen, using a conventional PPIase assay to screen a library of ∼2000 FDA-approved drugs with crystallographic analysis of the CypD-ebselen crystal structure (PDB code: 8EJX). More importantly, we assessed the effects of genetic and pharmacological blockade of CypD on Alzheimer's disease mitochondrial and glycolytic bioenergetics in Alzheimer's disease-derived mitochondrial cybrid cells, an ex vivo human sporadic Alzheimer's disease mitochondrial model, and on synaptic function, inflammatory response and learning and memory in Alzheimer's disease mouse models. Inhibition of CypD by ebselen protects against sporadic Alzheimer's disease- and amyloid-ß-induced mitochondrial and glycolytic perturbation, synaptic and cognitive dysfunction, together with suppressing neuroinflammation in the brain of Alzheimer's disease mouse models, which is linked to CypD-related membrane permeability transition pore formation. Thus, CypD inhibitors have the potential to slow the progression of neurodegenerative diseases, including Alzheimer's disease, by boosting mitochondrial bioenergetics and improving synaptic and cognitive function.


Assuntos
Doença de Alzheimer , Isoindóis , Mitocôndrias , Compostos Organosselênicos , Peptidil-Prolil Isomerase F , Doença de Alzheimer/tratamento farmacológico , Doença de Alzheimer/metabolismo , Peptidil-Prolil Isomerase F/metabolismo , Animais , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Camundongos , Humanos , Cognição/efeitos dos fármacos , Azóis/farmacologia , Azóis/uso terapêutico , Ciclofilinas/metabolismo , Ciclofilinas/antagonistas & inibidores , Camundongos Transgênicos , Camundongos Endogâmicos C57BL , Masculino , Modelos Animais de Doenças , Inibidores Enzimáticos/farmacologia , Inibidores Enzimáticos/uso terapêutico
4.
PLOS Glob Public Health ; 3(5): e0001240, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37228043

RESUMO

Despite the global decline, neonatal mortality rates (NMR) remain high in India. Family members are often responsible for the postpartum care of neonates and mothers. Yet, low health literacy and varied beliefs can lead to poor health outcomes. Postpartum education for family caregivers, may improve the adoption of evidence-based neonatal care and health outcomes. The Care Companion Program (CCP) is a hospital-based, pre-discharge health training session where nurses teach key healthy behaviors to mothers and family members, including skills and an opportunity to practice them in the hospital. We conducted a quasi-experimental study to assess the effect of the CCP sessions on mortality outcomes among families seeking care in 28 public tertiary facilities across 4 Indian states. Neonatal mortality outcomes were reported post-discharge, collected via phone surveys at four weeks postpartum, between October 2018 to February 2020. Risk ratios (RR), adjusting for hospital-level clustering, were calculated by comparing mortality rates before and after CCP implementation. A total of 46,428 families participated in the pre-intervention group and 87,305 in the post-intervention group; 76% of families completed the phone survey. Among the 33,599 newborns born before the CCP implementation, there were 1386 deaths (NMR: 41.3 deaths per 1000 live births). After the intervention began, there were 2021 deaths out of 60,078 newborns born (crude NMR: 33.6 deaths per 1000 live births, RR = 0.82, 95% CI: 0.76, 0.87; cluster-adjusted RR = 0.82, 95% CI: 0.71, 0.94). There may be a substantial benefit to family-centered education in the early postnatal period to reduce neonatal mortality.

5.
bioRxiv ; 2023 Sep 30.
Artigo em Inglês | MEDLINE | ID: mdl-37205469

RESUMO

Alzheimer's disease patients and mouse models exhibit aberrant neuronal activity and altered excitatory-to-inhibitory synaptic ratio. Using multicolor two-photon microscopy, we test how amyloid pathology alters the structural dynamics of excitatory and inhibitory synapses and their adaptation to altered visual experience in vivo in the visual cortex. We show that the baseline dynamics of mature excitatory synapses and their adaptation to visual deprivation are not altered in amyloidosis. Likewise, the baseline dynamics of inhibitory synapses are not affected. In contrast, visual deprivation fails to induce inhibitory synapse loss in amyloidosis, a phenomenon observed in nonpathological conditions. Intriguingly, inhibitory synapse loss associated with visual deprivation in nonpathological mice is accompanied by the broadening of spontaneous but not visually evoked calcium transients. However, such broadening does not manifest in the context of amyloidosis. We also show that excitatory and inhibitory synapse loss is locally clustered under the nonpathological state. In contrast, a fraction of synapse loss is not locally clustered in amyloidosis, indicating an impairment in inhibitory synapse adaptation to changes in excitatory synaptic activity.

6.
PLOS Glob Public Health ; 3(2): e0000524, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36962764

RESUMO

Globally 2.5 million newborns die every year before they reach the age of one month; the majority of these deaths occur in low- and middle-income countries. Among other factors, inadequate knowledge and skills to take care of newborns contribute to these deaths. To fill this gap, training patients and family members on the behaviors needed to improve essential newborn care practices at home is a promising opportunity. One program that aims to do this is the Care Companion Program (CCP) which provides in-hospital, skills-based training on care of mothers and newborns to families. This study uses semi-structured interviews to understand how and why knowledge and behaviors of maternal and newborn care behaviors change (or don't change) as a result of CCP sessions and participants' perception of the impact of CCP on change. Interviews focused on knowledge and behaviors around key neonatal and newborn topics and health seeking behaviors for health complications. Forty-two in-depth interviews were conducted among families with recently-delivered babies at their homes from four districts in Karnataka, India. Respondents have a positive perception about CCP, found training useful and appreciated other family members presence during the training. CCP increased knowledge and awareness and provided critical details to key behaviors like breastfeeding. Respondents were more likely to be receptive toward details on already known topics, like hand washing before touching the baby. Awareness increased on newly learned behaviors, like skin-to-skin care, which don't conflict with cultural norms. The CCP did not influence nonrestrictive maternal diet as much, which cultural norms heavily influence. In-hospital family caregiver education programs, like CCP, can positively influence key neonatal behaviors by imparting knowledge and key skills. However, the effect is not universal across health behaviors.

7.
Clin Epidemiol Glob Health ; 20: 101236, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36743949

RESUMO

Background: Phone-supported recovery of COVID-19 patients in home isolation could be an effective way of addressing COVID-19 in contexts with limited resources. The COVID-19 Care Companion Program (CCP) is one such intervention, designed to support patients and their caregivers in remote, evidence-based management of COVID-19 symptoms. Objective: To estimate the effect of providing phone-based training to COVID-19 patients and their caregivers on the likelihood of hospitalizations and mortality. Methods: A pragmatic randomized trial was conducted to assess the effect of a novel phone-based training program on COVID-19 home-isolated patient outcomes. The analysis compared the outcomes of death and hospitalizations in the teletraining intervention group (CCP) to those receiving standard of care (SoC). Results: Logistic regression models adjusted for age, gender, education, occupation, and poverty, as measured by family possession of Below Poverty Line (BPL) card, were used to look at the effect of intervention on hospitalization and mortality. While the CCP intervention had no effect on 21-day mortality (OR 0.64; 95% CI, 0.19 to 2.12), it was associated with a 48% reduction in 21-day hospitalization (OR 0.52; 95% CI, 0.31 to 0.90). Conclusion: COVID-19 CCP teletraining intervention reduced the rate of hospitalization, potentially reducing the burden on hospitals.

8.
J Clin Invest ; 133(2)2023 01 17.
Artigo em Inglês | MEDLINE | ID: mdl-36647832

RESUMO

Tyrosine kinase inhibitors (TKIs) targeting epidermal growth factor receptor (EGFR) are effective for many patients with lung cancer with EGFR mutations. However, not all patients are responsive to EGFR TKIs, including even those harboring EGFR-sensitizing mutations. In this study, we quantified the cells and cellular interaction features of the tumor microenvironment (TME) using routine H&E-stained biopsy sections. These TME features were used to develop a prediction model for survival benefit from EGFR TKI therapy in patients with lung adenocarcinoma and EGFR-sensitizing mutations in the Lung Cancer Mutation Consortium 1 (LCMC1) and validated in an independent LCMC2 cohort. In the validation data set, EGFR TKI treatment prolonged survival in the predicted-to-benefit group but not in the predicted-not-to-benefit group. Among patients treated with EGFR TKIs, the predicted-to-benefit group had prolonged survival outcomes compared with the predicted not-to-benefit group. The EGFR TKI survival benefit positively correlated with tumor-tumor interaction image features and negatively correlated with tumor-stroma interaction. Moreover, the tumor-stroma interaction was associated with higher activation of the hepatocyte growth factor/MET-mediated PI3K/AKT signaling pathway and epithelial-mesenchymal transition process, supporting the hypothesis of fibroblast-involved resistance to EGFR TKI treatment.


Assuntos
Neoplasias Pulmonares , Fosfatidilinositol 3-Quinases , Humanos , Fosfatidilinositol 3-Quinases/genética , Microambiente Tumoral/genética , Inibidores de Proteínas Quinases/farmacologia , Inibidores de Proteínas Quinases/uso terapêutico , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/metabolismo , Receptores ErbB/metabolismo , Resistencia a Medicamentos Antineoplásicos/genética , Mutação
9.
Vaccines (Basel) ; 10(4)2022 Mar 25.
Artigo em Inglês | MEDLINE | ID: mdl-35455256

RESUMO

COVID-19 has impacted children's immunization rates, putting the lives of children at risk. The present study assesses the impact of phone-call counseling, on immunization uptake during the pandemic. Families of babies discharged from the SNCUs in six government centers in three South Indian states were recruited. Calls were made 10 days after the immunization due date. Missed vaccinees were counseled and followed up on 7 and 15 days. Of 2313 contacted, 2097 completed the survey. Respondents were mostly mothers (88.2%), poor (67.5%), and had secondary level education (37.4%). Vaccinations were missed due to the baby's poor health (64.1%), COVID-19 related concerns (32.6%), and lack of awareness (16.8%). At the end of the intervention, the immunization uptake increased from 65.2% to 88.2%. Phone-call intervention can safely support immunization and lower the burden on health workers.

10.
Hum Mol Genet ; 31(15): 2498-2507, 2022 08 17.
Artigo em Inglês | MEDLINE | ID: mdl-35165721

RESUMO

Tau oligomers (oTau) are thought to precede neurofibrillary tangle formation and likely represent one of the toxic species in disease. This study addresses whether mitochondrial reactive oxygen species (ROS) contribute to tau oligomer accumulation. First, we determined whether elevated oxidative stress correlates with aggregation of tau oligomers in the brain and platelets of human Alzheimer's disease (AD) patient, tauopathy mice, primary cortical neurons from tau mice and human trans-mitochondrial 'cybrid' (cytoplasmic hybrid) neuronal cells, whose mitochondria are derived from platelets of patients with sporadic AD- or mild cognitive impairment (MCI)-derived mitochondria. Increased formation of tau oligomers correlates with elevated ROS levels in the hippocampi of AD patients and tauopathy mice, AD- and MCI-derived mitochondria and AD and MCI cybrid cells. Furthermore, scavenging ROS by application of mito-TEMPO/2-(2,2,6,6-Tetramethylpiperidin-1-oxyl-4-ylamino)-2-oxoethyl)triphenylphosphonium chloride, a mitochondria-targeted antioxidant, not only inhibits the generation of mitochondrial ROS and rescues mitochondrial respiratory function but also robustly suppresses tau oligomer accumulation in MCI and AD cybrids as well as cortical neurons from tau mice. These studies provide substantial evidence that mitochondria-mediated oxidative stress contributes to tau oligomer formation and accumulation.


Assuntos
Doença de Alzheimer , Tauopatias , Doença de Alzheimer/patologia , Animais , Humanos , Camundongos , Mitocôndrias/metabolismo , Estresse Oxidativo/fisiologia , Espécies Reativas de Oxigênio/metabolismo , Tauopatias/metabolismo , Proteínas tau/genética , Proteínas tau/metabolismo
11.
Health Promot Pract ; 23(6): 1039-1049, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-34636268

RESUMO

India experiences a substantial burden of cervical cancer and accounts for nearly one third of cervical cancer deaths worldwide. While human papillomavirus (HPV) vaccines have been introduced subnationally in some states, HPV has not yet been rolled out nationally. Given the target age group, schools are the most common delivery channel for HPV vaccines, but this fails to account for local girls who never attended or no longer attend school. We conducted a qualitative, design-informed, community-based study conducted in Uttar Pradesh, India. We assessed facilitators and barriers among out-of-school girls and proposed program characteristics to inform the design of pro-equity HPV vaccine delivery programs for out-of-school girls. Programs should improve parental knowledge of the risk of cervical cancer, engage vaccinated girls as vaccine champions, utilize varied media options for low-literacy populations, and ensure that HPV vaccine services are accessible and flexible to accommodate out-of-school girls. In areas with poor or irregular school attendance among adolescent girls, HPV vaccine coverage will remain suboptimal until programs can effectively address their needs and reach this priority population. Our findings present a meaningful opportunity for program planners to purposefully design HPV vaccination programs according to these parameters, rather than modifying existing programs to include HPV vaccine. Adolescent girls, their parents, and other community members should be involved in program design to ensure that the program can effectively meet the needs of adolescent girls who are not in school.


Assuntos
Infecções por Papillomavirus , Vacinas contra Papillomavirus , Neoplasias do Colo do Útero , Adolescente , Feminino , Humanos , Infecções por Papillomavirus/prevenção & controle , Neoplasias do Colo do Útero/prevenção & controle , Aceitação pelo Paciente de Cuidados de Saúde , Conhecimentos, Atitudes e Prática em Saúde , Vacinação
12.
BMC Public Health ; 21(1): 2287, 2021 12 15.
Artigo em Inglês | MEDLINE | ID: mdl-34911505

RESUMO

BACKGROUND: Malaria is a persistent public health challenge among miners and other hard-to-reach populations in Guyana's hinterland, specifically in Regions 1, 7, 8, and 9. Despite an overall decrease in malaria prevalence throughout Guyana, it remains common among mining populations whose work conditions both contribute toward malaria transmission and make it difficult to seek timely, Ministry of Health (MoH) approved malaria testing and treatment services. In an effort to develop innovative approaches to address this public health challenge, an interdisciplinary team of public health professionals, designers, and mining organizations collaborated using a human-centered design (HCD) process facilitated by the USAID-funded Breakthrough ACTION Guyana project in partnership with the MoH. METHODS: This paper describes two phases: [1] Define and [2] Design & Test. In the Define phase, following a literature review, we conducted 108 qualitative interviews with miners, camp managers, trained malaria testers, health workers, and other key stakeholders to understand experiences and challenges when seeking malaria testing and treatment services. These interviews were synthesized into 11 insights on issues such as risk perception, malaria knowledge, preventive behaviors, traditional and self-treatment, adherence to the correct treatment, testing, and coordination and communication gaps. From these insights, during the Design & Test phase, we developed 33 "How might we…?" questions which led to 792 ideas, of which eight emergent concepts were prototyped and refined in the field with 145 miners, camp managers, and stakeholders. RESULTS: The five final prototypes included: "Little Mosquito, Big Problem" social behavior change campaign; rapid counseling cards; branded malaria testing and treatment services; innovations in treatment adherence; and a participants, content, and logistics approach. CONCLUSION: When applying HCD to public health issues, there are both opportunities and challenges to reconcile gaps that may exist between the two disciplines. However, HCD provides additional tools and mindsets to generatively work with migrant and mobile mining communities to encourage malaria testing and treatment services.


Assuntos
Malária , Mineradores , Migrantes , Guiana , Humanos , Malária/diagnóstico , Malária/prevenção & controle , Mineradores/psicologia , Aceitação pelo Paciente de Cuidados de Saúde/psicologia
13.
J Am Soc Cytopathol ; 10(6): 577-584, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34238730

RESUMO

INTRODUCTION: The deployment of telecytology (TC) requires a substantial investment of financial and human resources. To offset the high demand for rapid on-site evaluation, we performed a limited deployment of dynamic TC and have detailed the workflow processes and the role of trainees. MATERIALS AND METHODS: TC systems were installed in radiology suites with a high volume of cases. Validation was performed using retrospective and prospective cases. Cytotechnologists and cytopathology fellows were the operators of the instrument. TC malignant and benign diagnoses were correlated with the final sign-out diagnoses. RESULTS: Of the 120 cases, 50 (41.6%) were fine needle aspirations and 70 (58.3%) were touch imprint smears of core biopsy specimens. The cytotechnologists were the operators for 34 cases (28.3%) and cytology fellows for 86 cases (71.6%). Adequacy concordance with the final diagnosis was 100% and 98.5% in the retrospective and prospective cases, respectively. In the prospective cases, concordance of TC with the final diagnosis of malignancy was 42 of 45 (93.3%), with 2 of 45 (4.4%) discordant and a downgrade rate of 2.7%. For the benign diagnoses, the concordance was 90%. For the malignant diagnoses, the sensitivity of TC was 97.67% (95% confidence interval [CI], 87.71 to 99.94%; specificity, 81.82%; 95% CI, 48.22% to 97.72%). The positive predictive value was 95.45% (95% CI, 85.69% to 98.66%), the negative predictive value was 90.00% (95% CI, 55.98% to 98.45%), and the accuracy was 94.44% (95% CI, 84.61% to 98.84%). CONCLUSIONS: TC can be deployed in a limited fashion as an option for cytopathologists to offset the high demand for rapid on-site evaluations. Trainee participation in TC service is important for building confidence and honing their cytology skills.


Assuntos
Neoplasias/diagnóstico , Avaliação Rápida no Local , Telepatologia , Biópsia por Agulha Fina , Técnicas Citológicas , Humanos , Neoplasias/patologia , Estudos Retrospectivos , Sensibilidade e Especificidade , Fluxo de Trabalho
14.
J Alzheimers Dis ; 81(4): 1749-1761, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33998543

RESUMO

BACKGROUND: Mitochondrial dysfunction, bioenergetic deficit, and extensive oxidative stress underlie neuronal perturbation during the early stage of Alzheimer's disease (AD). Previously, we demonstrated that decreased PTEN-induced putative kinase 1 (PINK1) expression is associated with AD pathology in AD-affected human brains and AD mice. OBJECTIVE: In the present study, we highlight the essential role of PINK1 in AD-relevant mitochondrial perturbation and neuronal malfunction. METHODS: Using trans-mitochondrial "cybrid" (cytoplasmic hybrid) neuronal cells, whose mitochondria are transferred from platelets of patients with sporadic AD, we observed the effect of PINK1 in neuronal-like differentiation and synaptogenesis and mitochondrial functions. RESULTS: In AD cybrid cells, the downregulation of PINK1 is correlated to the alterations in mitochondrial morphology and function and deficit in neuronal-like differentiation. Restoring/increasing PINK1 by lentivirus transduction of PINK1 robustly attenuates mitochondrial defects and rescues neurite-like outgrowth. Importantly, defective PINK1 kinase activity fails to reverse these detrimental effects. Mechanistically, AD cybrid cells reveal a significant decrease in PINK1-dependent phosphorylated mitofusin (Mfn) 2, a key mitochondrial membrane protein that participates in mitochondrial fusion, and an insufficient autophagic activity for the clearance of dysfunctional mitochondria. Overexpression of PINK1, but not mutant PINK1 elevates phosphorylation of Mfn2 and autophagy signaling LC3-II. Accordingly, PINK1-overexpressed AD cybrids exhibit increases in mitochondrial length and density and suppressed reactive oxygen species. These results imply that activation of PINK1 protects against AD-affected mitochondrial dysfunction and impairment in neuronal maturation and differentiation. CONCLUSION: PINK1-mediated mitophagy is important for maintaining mitochondrial health by clearance of dysfunctional mitochondria and therefore, improves energy homeostasis in AD.


Assuntos
Doença de Alzheimer/metabolismo , Diferenciação Celular/fisiologia , Mitocôndrias/metabolismo , Neurônios/metabolismo , Proteínas Quinases/metabolismo , Sinapses/metabolismo , Autofagia/fisiologia , Humanos , Mitofagia/fisiologia , Fosforilação
15.
Aging Cell ; 20(5): e13368, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-33951271

RESUMO

Mitochondrial dysfunction is one of the early pathological features of Alzheimer's disease (AD). Accumulation of cerebral and mitochondrial Aß links to mitochondrial and synaptic toxicity. We have previously demonstrated the mechanism by which presequence peptidase (PITRM1)-mediated clearance of mitochondrial Aß contributes to mitochondrial and cerebral amyloid pathology and mitochondrial and synaptic stress in adult transgenic AD mice overexpressing Aß up to 12 months old. Here, we investigate the effect of PITRM1 in an advanced age AD mouse model (up to 19-24 months) to address the fundamental unexplored question of whether restoration/gain of PITRM1 function protects against mitochondrial and synaptic dysfunction associated with Aß accumulation and whether this protection is maintained even at later ages featuring profound amyloid pathology and synaptic failure. Using newly developed aged PITRM1/Aß-producing AD mice, we first uncovered reduction in PITRM1 expression in AD-affected cortex of AD mice at 19-24 months of age. Increasing neuronal PITRM1 activity/expression re-established mitochondrial respiration, suppressed reactive oxygen species, improved synaptic function, and reduced loss of synapses even at advanced ages (up to 19-24 months). Notably, loss of PITRM1 proteolytic activity resulted in Aß accumulation and failure to rescue mitochondrial and synaptic function, suggesting that PITRM1 activity is required for the degradation and clearance of mitochondrial Aß and Aß deposition. These data indicate that augmenting PITRM1 function results in persistent life-long protection against Aß toxicity in an AD mouse model. Therefore, augmenting PITRM1 function may enhance Aß clearance in mitochondria, thereby maintaining mitochondrial integrity and ultimately slowing the progression of AD.


Assuntos
Doença de Alzheimer/enzimologia , Metaloendopeptidases/metabolismo , Mitocôndrias/enzimologia , Neurônios/enzimologia , Sinapses/metabolismo , Envelhecimento , Doença de Alzheimer/metabolismo , Peptídeos beta-Amiloides/metabolismo , Precursor de Proteína beta-Amiloide/genética , Animais , Encéfalo/metabolismo , Cognição , Modelos Animais de Doenças , Feminino , Inflamação , Masculino , Metaloendopeptidases/genética , Camundongos Transgênicos , Mitocôndrias/metabolismo , Neurônios/metabolismo , Sinapses/fisiologia
16.
Diagn Cytopathol ; 49(7): 876-884, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-33900686

RESUMO

BACKGROUND: Lipid-laden macrophages detected by Oil-Red-O (ORO) stain in fresh bronchoalveolar lavage (BAL) specimens have been proposed as a potential diagnostic marker for E-cigarettes or vaping product use-associated lung injury (EVALI). However, studies are few, and the sensitivity and specificity of the test have not been thoroughly investigated. METHODS: We performed ORO stain on fresh BAL specimens from six confirmed EVALI and 36 non-EVALI patients. After semi-quantitative analysis, the sensitivity and specificity of ORO-positive macrophages (OPM) for detection of EVALI were calculated. RESULTS: No significant difference in cytomorphology or raw macrophage count was observed between EVALI and non-EVALI groups (49% vs 55% of all nucleated cells). However, with ORO stain, all EVALI specimens (6/6) showed a high percentage (≥50% of all macrophages) of OPM (mean 87%), and large (≥25% of host macrophage nuclear size) lipid droplets (mean 42%), while the majority of non-EVALI specimens showed a low percentage of OPM (32/36, mean 10%), and small lipid droplets (34/36, mean 6%). The differences between the two groups in both high OPM and large lipid droplet rates are statistically significant (P < .0001 for both comparisons). The combined sensitivity and specificity of high OPM and large lipid droplets for diagnosing EVALI were 100% and 94%, respectively. CONCLUSION: In BAL specimens obtained from patients with clinically suspected EVALI, a high percentage of OPM with large lipid droplets showed high sensitivity and specificity for the diagnosis of EVALI and may serve as a potentially useful tool in the evaluation of vaping-related lung injury, improving diagnostic accuracy.


Assuntos
Compostos Azo , Lesão Pulmonar/diagnóstico , Lesão Pulmonar/etiologia , Macrófagos/metabolismo , Vaping/efeitos adversos , Adolescente , Adulto , Líquido da Lavagem Broncoalveolar/citologia , Corantes , Vapor do Cigarro Eletrônico/efeitos adversos , Sistemas Eletrônicos de Liberação de Nicotina , Feminino , Humanos , Masculino , Sensibilidade e Especificidade , Coloração e Rotulagem/métodos , Adulto Jovem
17.
J Oncol Pharm Pract ; 27(2): 389-394, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33459159

RESUMO

PURPOSE: With the rapid spread of COVID-19 in New York City since early March 2020, innovative measures were needed for clinical pharmacy specialists to provide direct clinical care safely to cancer patients. Allocating the workforce was necessary to meet the surging needs of the inpatient services due to the COVID-19 outbreak, which had the potential to compromise outpatient services. We present here our approach of restructuring clinical pharmacy services and providing direct patient care in outpatient clinics during the pandemic. DATA SOURCES: We conducted a retrospective review of electronic clinical documentation involving clinical pharmacy specialist patient encounters in 9 outpatient clinics from March 1, 2020 to May 31, 2020. The analysis of the clinical pharmacy specialist interventions and the impact of the interventions was descriptive. DATA SUMMARY: As hospital services were modified to handle the surge due to COVID-19, select clinical pharmacy specialists were redeployed from the outpatient clinics or research blocks to COVID-19 inpatient teams. During these 3 months, clinical pharmacy specialists were involved in 2535 patient visits from 9 outpatient clinics and contributed a total of 4022 interventions, the majority of which utilized telemedicine. The interventions provided critical clinical pharmacy care during the pandemic and omitted 199 in-person visits for medical care. CONCLUSION: The swift transition to telemedicine allowed the provision of direct clinical pharmacy services to patients with cancer during the COVID-19 pandemic.


Assuntos
Instituições de Assistência Ambulatorial/organização & administração , COVID-19 , Institutos de Câncer/organização & administração , Neoplasias/terapia , Pandemias , Serviço de Farmácia Hospitalar/organização & administração , COVID-19/terapia , Humanos , Cidade de Nova Iorque , Assistência ao Paciente , Farmacêuticos , Papel Profissional , Estudos Retrospectivos , Telemedicina
18.
Free Radic Biol Med ; 164: 429-438, 2021 02 20.
Artigo em Inglês | MEDLINE | ID: mdl-33359687

RESUMO

Aging is a strong risk factor for brain dementia and cognitive decline. Age-related accumulation of metabolites such as advanced glycation end products (AGEs) could serve as danger signals to initiate and accelerate disease process and neurodegeneration. The underlying causes and consequences of cerebral AGEs accumulation remain largely unknown. Here, we comprehensively investigate age-related accumulation of AGEs and dicarbonyls, including methylglyoxal (MG), glyoxal (GO), and 3-deoxyglucosone (3-DG), and the effects of mitochondrial reactive oxygen species (ROS) on cerebral AGEs accumulation, mitochondrial function, and oxidative stress in the aging human and mouse brain. We demonstrate that AGEs, including arginine and lysine derived N(6)-carboxymethyl lysine (CML), Nε-(1-Carboxyethyl)-l-lysine (CEL), and methylglyoxal-derived hydroimidazolone-1 (MG-H1), were significantly elevated in the cerebral cortex and hippocampus with advanced age in mice. Accordingly, aging mouse and human brains revealed decrease in activities of mitochondrial respiratory chain complexes I & IV and ATP levels, and increased ROS. Notably, administration of mitoTEMPO (2-(2,2,6,6-Tetramethylpiperidin-1-oxyl-4-ylamino)-2-oxoethyl)triphenylphosphonium chloride (mTEMPO), a scavenger of mitochondrial ROS, not only suppressed ROS production but also reduced aged-induced accumulation of AGEs and dicarbonyls. mTEMPO treatment improved mitochondrial respiratory function and restored ATP levels. Our findings provide evidence linking age-related accumulation of toxic metabolites (AGEs) to mitochondrial oxidative stress. This highlights a novel mechanism by which AGEs-dependent signaling promotes carbonyl stress and sustained mitochondrial dysfunction. Eliminating formation and accumulation of AGEs may represent a new therapeutic avenue for combating cognitive decline and mitochondrial degeneration relevant to aging and neurodegenerative diseases including Alzheimer's disease.


Assuntos
Produtos Finais de Glicação Avançada , Mitocôndrias , Animais , Arginina , Camundongos , Aldeído Pirúvico , Espécies Reativas de Oxigênio
19.
BMJ Glob Health ; 5(7)2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-32727842

RESUMO

Worldwide, many newborns die in the first month of life, with most deaths happening in low/middle-income countries (LMICs). Families' use of evidence-based newborn care practices in the home and timely care-seeking for illness can save newborn lives. Postnatal education is an important investment to improve families' use of evidence-based newborn care practices, yet there are gaps in the literature on postnatal education programees that have been evaluated to date. Recent findings from a 13 000+ person survey in 3 states in India show opportunities for improvement in postnatal education for mothers and families and their use of newborn care practices in the home. Our survey data and the literature suggest the need to incorporate the following strategies into future postnatal education programming: implement structured predischarge education with postdischarge reinforcement, using a multipronged teaching approach to reach whole families with education on multiple newborn care practices. Researchers need to conduct robust evaluation on postnatal education models incorporating these programee elements in the LMIC context, as well as explore whether this type of education model can work for other health areas that are critical for families to survive and thrive.


Assuntos
Assistência ao Convalescente , Cesárea , Educação de Pacientes como Assunto , Países em Desenvolvimento , Feminino , Humanos , Índia , Lactente , Recém-Nascido , Mães , Alta do Paciente , Gravidez
20.
Malar J ; 19(1): 235, 2020 Jul 06.
Artigo em Inglês | MEDLINE | ID: mdl-32631345

RESUMO

BACKGROUND: Although Guyana has made significant progress toward malaria control, limited access to malaria testing and treatment services threatens those gains. Mining activities create breeding environments for mosquitoes, and the migrant and mobile mining populations are hard to reach with information and services. The Ministry of Public Health (MoPH) has trained volunteers to test and treat malaria cases in remote regions. However, it remains unclear how miners perceive these testers, the services they provide, or what their malaria care-seeking behaviour is in general. To better address these challenges, Breakthrough ACTION Guyana and MoPH conducted qualitative research from October to November 2018 in Regions 7 and 8 in Guyana. METHODS: A total of 109 individuals, 70 miners, 17 other mining camp staff, and 22 other key stakeholders (e.g. community health workers, pharmacists, and regional leadership), participated in semi-structured interviews and focus group discussions. Results were derived using a framework analysis, with an adjusted doer and non-doer analysis, and organized using the integrated behaviour framework. RESULTS: Miners sought MoPH-approved services because of close geographic proximity to testing services, a preference for public service treatment, and a desire to correctly diagnose and cure malaria rather than just treat its symptoms. Those who chose to initiate self-treatment-using unregulated medications from the private and informal sector-did so out of convenience and the belief that self-treatment had worked before. Miners who completed the full MoPH-approved treatment understood the need to complete the treatment, while those who prematurely stopped treatment did so because of medication side effects and a desire to feel better as soon as possible. CONCLUSION: Reasons why miners do and do not pursue malaria testing and treatment services are diverse. These results can inform better MoPH programming and new solutions to improve malaria outcomes in Guyana.


Assuntos
Malária , Mineradores/psicologia , Motivação , Aceitação pelo Paciente de Cuidados de Saúde/psicologia , Ouro , Guiana , Humanos , Malária/diagnóstico , Malária/terapia , Masculino , Mineradores/estatística & dados numéricos , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos
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