21 results on '"Maranon, R"'
Search Results
2. Evaluación de la efectividad de acciones correctivas derivadas de la notificación de incidentes en urgencias pediátricas
- Author
-
Marañón, R., Solís-García, G., Ignacio Cerro, C., Díaz Redondo, A., Romero Martínez, A.I., and Mora Capín, A.
- Published
- 2019
- Full Text
- View/download PDF
3. Evaluación de la efectividad de un procedimiento de identificación de pacientes con alergia en urgencias pediátricas
- Author
-
Escobar Castellanos, M., Mora Capín, A.A., Merino Hernández, A., and Marañón, R.
- Published
- 2021
- Full Text
- View/download PDF
4. Research priorities for European paediatric emergency medicine
- Author
-
Bressan, S, Titomanlio, L, Gomez, B, Mintegi, S, Gervaix, A, Parri, N, Da Dalt, L, Moll, Henriette, Waisman, Y, Maconochie, IK, Oostenbrink, Rianne, Er, A, Anil, M, Bal, A, Manzano, S, Lacroix, L, Galetto, A, Beattie, T, Bidlingmaier, C, Lucas, N, Maranon, R, Pucuka, Z, Latvia, R, Loellgen, R, Keitel, K, Hoeffe, J, Geurts, Dorien, Dubos, F, Lyttle, M, Bognar, Z, Simon, G, Fodor, L, Romanengo, M, Gras-le-Guen, C, Greber-Platzer, S, Cubells, CL, Teksam, O, Turan, C, Van de Voorde, P, Basmaci, R, Frassanito, A, Saz, U, Irfanos, I, Sotoca, J, Berant, R, Farrugia, R, Velasco, R, Nijman, R, Macao, P, Ege Üniversitesi, and Pediatrics
- Subjects
medicine.medical_specialty ,Delphi Technique ,Priority list ,Psychological intervention ,Delphi method ,Pediatrics ,Pediatric Emergency Medicine/organization & administration ,Hospital/organization & administration ,Quality Improvement/organization & administration ,1117 Public Health and Health Services ,Europe/epidemiology ,03 medical and health sciences ,0302 clinical medicine ,Paediatric emergency medicine ,030225 pediatrics ,Epidemiology ,medicine ,Medicine and Health Sciences ,Humans ,UK ,Child ,Emergency Service ,Science & Technology ,ddc:618 ,business.industry ,Pediatric Emergency Medicine ,Health Priorities ,Health services research ,030208 emergency & critical care medicine ,1103 Clinical Sciences ,Emergency department ,Quality Improvement ,health services research ,REPEM ,Europe ,epidemiology ,Scale (social sciences) ,Family medicine ,Pediatrics, Perinatology and Child Health ,1114 Paediatrics and Reproductive Medicine ,Original Article ,Health Services Research ,business ,Emergency Service, Hospital ,Life Sciences & Biomedicine - Abstract
Mintegi, Santiago/0000-0002-2342-8881; Gomez, Borja/0000-0001-6542-4494; Nijman, Ruud Gerard/0000-0001-9671-8161; Parri, Niccolo/0000-0002-8098-2504; Maconochie, Ian/0000-0001-6319-8550, WOS: 000495095400013, PubMed: 31023707, Objective Research in European Paediatric Emergency Medicine (REPEM) network is a collaborative group of 69 paediatric emergency medicine (PEM) physicians from 20 countries in Europe, initiated in 2006. To further improve paediatric emergency care in Europe, the aim of this study was to define research priorities for PEM in Europe to guide the development of future research projects. Design and Setting We carried out an online survey in a modified three-stage Delphi study. Eligible participants were members of the REPEM network. in stage 1, the REPEM steering committee prepared a list of research topics. in stage 2, REPEM members rated on a 6-point scale research topics and they could add research topics and comment on the list for further refinement. Stage 3 included further prioritisation using the Hanlon Process of Prioritisation (HPP) to give more emphasis to the feasibility of a research topic. Results Based on 52 respondents (response rates per stage varying from 41% to 57%), we identified the conditions 'fever', 'sepsis' and 'respiratory infections', and the processes/interventions 'biomarkers', 'risk stratification' and 'practice variation' as common themes of research interest. the HPP identified highest priority for 4 of the 5 highest prioritised items by the Delphi process, incorporating prevalence and severity of each condition and feasibility of undertaking such research. Conclusions While the high diversity in emergency department (ED) populations, cultures, healthcare systems and healthcare delivery in European PEM prompts to focus on practice variation of ED conditions, our defined research priority list will help guide further collaborative research efforts within the REPEM network to improve PEM care in Europe.
- Published
- 2019
5. Research priorities for European paediatric emergency medicine
- Author
-
Bressan, S., Titomanlio, L., Gomez, B., Mintegi, S, Gervaix, A, Parri, N, Da Dalt, L, Moll, H.A. (Henriëtte), Waisman, Y, Maconochie, IK, Oostenbrink, R. (Rianne), Er, A., Anil, M., Bal, A., Manzano, S., Lacroix, L, Galetto, A., Beattie, T., Bidlingmaier, C., Lucas, N, Maranon, R., Pucuka, Z., Latvia, R., Loellgen, R., Keitel, K., Hoeffe, J., Geurts, D., Dubos, F., Lyttle, M., Bognar, Z., Simon, G., Fodor, L., Romanengo, M., Gras-le-Guen, C., Greber-Platzer, S., Cubells, C.L., Teksam, O., Turan, C., Voorde, P. (Patrick) van de, Basmaci, R., Frassanito, A., Saz, U., Irfanos, I., Sotoca, J., Berant, R., Farrugia, R., Velasco, R, Nijman, R.M. (Romana), Macao, P., Bressan, S., Titomanlio, L., Gomez, B., Mintegi, S, Gervaix, A, Parri, N, Da Dalt, L, Moll, H.A. (Henriëtte), Waisman, Y, Maconochie, IK, Oostenbrink, R. (Rianne), Er, A., Anil, M., Bal, A., Manzano, S., Lacroix, L, Galetto, A., Beattie, T., Bidlingmaier, C., Lucas, N, Maranon, R., Pucuka, Z., Latvia, R., Loellgen, R., Keitel, K., Hoeffe, J., Geurts, D., Dubos, F., Lyttle, M., Bognar, Z., Simon, G., Fodor, L., Romanengo, M., Gras-le-Guen, C., Greber-Platzer, S., Cubells, C.L., Teksam, O., Turan, C., Voorde, P. (Patrick) van de, Basmaci, R., Frassanito, A., Saz, U., Irfanos, I., Sotoca, J., Berant, R., Farrugia, R., Velasco, R, Nijman, R.M. (Romana), and Macao, P.
- Abstract
Objective Research in European Paediatric Emergency Medicine (REPEM) network is a collaborative group of 69 paediatric emergency medicine (PEM) physicians from 20 countries in Europe, initiated in 2006. To further improve paediatric emergency care in Europe, the aim of this study was to define research priorities for PEM in Europe to guide the development of future research projects. Design and Setting We carried out an online survey in a modified three-stage Delphi study. Eligible participants were members of the REPEM network. In stage 1, the REPEM steering committee prepared a list of research topics. In stage 2, REPEM members rated on a 6-point scale research topics and they could add research topics and comment on the list for further refinement. Stage 3 included further prioritisation using the Hanlon Process of Prioritisation (HPP) to give more emphasis to the feasibility of a research topic. Results Based on 52 respondents (response rates per stage varying from 41% to 57%), we identified the conditions ’fever’, ’sepsis’ and ’respiratory infections’, and the processes/interventions ’biomarkers’, ’risk stratification’ and ’practice variation’ as common themes of research interest. The HPP identified highest priority for 4 of the 5 highest prioritised items by the Delphi process, incorporating prevalence and severity of each condition and feasibility of undertaking such research. Conclusions While the high diversity in emergency department (ED) populations, cultures, healthcare systems and healthcare delivery in European PEM prompts to focus on practice variation of ED conditions, our defined research priority list will help guide further collaborative research efforts within the REPEM network to improve PEM care in Europe.
- Published
- 2019
- Full Text
- View/download PDF
6. Infección de orina como manifestación de un absceso pélvico
- Author
-
Fernández Lafever, S.N., López, R., and Marañón, R.
- Published
- 2011
- Full Text
- View/download PDF
7. Improving Latino disaster preparedness using social networks.
- Author
-
Eisenman DP, Glik D, Gonzalez L, Maranon R, Zhou Q, Tseng CH, and Asch SM
- Published
- 2009
- Full Text
- View/download PDF
8. The Effectiveness of Shared Decision-making for Diabetes Prevention: 24- and 36-Month Results From the Prediabetes Informed Decision and Education (PRIDE) Trial.
- Author
-
Duru OK, Mangione CM, Turk N, Chon J, Fu J, Cheng G, Cheng F, Moss A, Frosch D, Jeffers KS, Castellon-Lopez Y, Tseng CH, Maranon R, Norris KC, and Moin T
- Subjects
- Adult, Humans, Decision Making, Shared, Weight Loss, Life Style, Decision Making, Patient Participation, Prediabetic State drug therapy, Metformin therapeutic use
- Abstract
Objective: We conducted a cluster-randomized, shared decision-making (SDM) trial offering lifestyle change, metformin, or both options, to adults at risk for diabetes in a primary care network (n = 20 practices)., Research Design and Methods: We used propensity score matching to identify control patients and used electronic health record data to compare weight loss at 24 and 36 months of follow-up and diabetes incidence at 36 months of follow-up., Results: In adjusted post hoc analyses, SDM participants (n = 489) maintained modestly greater 24-month weight loss of -3.1 lb and 36-month weight loss of -2.7 lb versus controls (n = 1,430, both comparisons P < 0.001). SDM participants who chose both lifestyle change and metformin sustained weight loss at 36 months of -4.1 lb (P < 0.001 vs. controls). We found no differences in incident diabetes (15% of SDM participants, 14% of control participants; P = 0.64)., Conclusions: This is one of the first studies to demonstrate weight loss maintenance up to 36 months after diabetes prevention SDM., (© 2023 by the American Diabetes Association.)
- Published
- 2023
- Full Text
- View/download PDF
9. A randomized controlled trial of a shared decision making intervention for diabetes prevention for women with a history of gestational diabetes mellitus: The Gestational diabetes Risk Attenuation for New Diabetes (GRAND study).
- Author
-
Madievsky R, Vu A, Cheng F, Chon J, Turk N, Krueger A, Krong J, Maranon R, Liu S, Han CS, Norris KC, Mangione C, Page J, Thomas S, Duru OK, and Moin T
- Subjects
- Pregnancy, Female, Humans, Decision Making, Shared, Obesity complications, Diabetes, Gestational prevention & control, Diabetes Mellitus, Type 2 prevention & control, Diabetes Mellitus, Type 2 complications, Metformin therapeutic use
- Abstract
Background: Gestational diabetes mellitus (GDM) is a risk factor for the development of type 2 diabetes. Metformin and lifestyle change through a Diabetes Prevention Program (DPP) are equally effective in preventing diabetes in patients with a GDM history, so women can choose a strategy based on their preferences. This study aims to test whether shared decision making (SDM) can help women with a history of GDM increase adoption of evidence-based strategies and lose weight to lower their risk of incident diabetes in real-world settings., Methods: This pragmatic randomized controlled trial (RCT) will test the effectiveness of SDM for diabetes prevention among 310 overweight/obese women with a history of GDM and prediabetes from two large health care systems (n = 155 from UCLA Health and n = 155 from Intermountain Healthcare). The primary outcome is the proportion of participants who lose ≥5% body weight at 12 months. Secondary outcomes include uptake of DPP and/or metformin and other patient-reported outcomes such as patient activation and health-related quality of life. Rates of GDM in a subsequent pregnancy will be an exploratory outcome. A descriptive analysis of costs related to SDM implementation will also be conducted., Conclusion: This is the first RCT to examine the effectiveness of SDM on weight loss, lifestyle change and/or metformin use, and other patient-reported outcomes in participants with a GDM history at risk of developing diabetes., Trial Registration: ClinicalTrials.gov, NCT03766256. Registered on 6 December 2018., (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
10. Differences in Weight Loss by Race and Ethnicity in the PRIDE Trial: a Qualitative Analysis of Participant Perspectives.
- Author
-
Saju R, Castellon-Lopez Y, Turk N, Moin T, Mangione CM, Norris KC, Vu A, Maranon R, Fu J, Cheng F, and Duru OK
- Subjects
- Humans, Ethnicity, Weight Loss, Hispanic or Latino, Life Style, Prediabetic State diagnosis, Prediabetic State therapy
- Abstract
Background: Many Diabetes Prevention Program (DPP) translation efforts have been less effective for underresourced populations. In the cluster-randomized Prediabetes Informed Decision and Education (PRIDE) trial, which evaluated a shared decision-making (SDM) intervention for diabetes prevention, Hispanic and non-Hispanic Black participants lost less weight than non-Hispanic White participants at 12-month follow-up., Objective: To explore perspectives about weight loss from PRIDE participants of different racial and ethnic groups., Participants: Sample of participants with prediabetes who were randomized to the PRIDE intervention arm (n=24)., Approach: We conducted semi-structured interviews within three groups stratified by DPP participation and % weight loss at 12 months: (DPP+/WL+, enrolled in DPP and lost >5% weight; DPP+/WL-, enrolled in DPP and lost <3% weight; DPP-/WL-, did not enroll in DPP and lost <3% weight). Each group was further subdivided on race and ethnicity (non-Hispanic Black (NHB), non-Hispanic White (NHW), Hispanic). Interviews were conducted on Zoom and transcripts were coded and analyzed with Dedoose., Key Results: Compared to NHW participants, Hispanic and NHB participants more often endorsed weight loss barriers of limited time to make lifestyle changes due to long work and commute hours, inconvenient DPP class locations and offerings, and limited disposable income for extra weight loss activities. Conversely, facilitators of weight loss regardless of race and ethnicity included retirement or having flexible work schedules; being able to identify convenient DPP classes; having a strong, positive support system; and purchasing supplementary resources to support lifestyle change (e.g., gym memberships, one-on-one activity classes)., Conclusions: We found that NHB and Hispanic SDM participants report certain barriers to weight loss more commonly than NHW participants, particularly barriers related to limited disposable income and/or time constraints. Our findings suggest that increased lifestyle change support and flexible program delivery options may be needed to ensure equity in DPP reach, participant engagement, and outcomes., (© 2022. The Author(s).)
- Published
- 2022
- Full Text
- View/download PDF
11. Reducing Emergency Department Visits Among Patients With Diabetes by Embedding Clinical Pharmacists in the Primary Care Teams.
- Author
-
Moreno G, Fu JY, Chon JS, Bell DS, Grotts J, Tseng CH, Maranon R, Skootsky SS, and Mangione CM
- Subjects
- Aged, Aged, 80 and over, Blood Pressure, Cholesterol, LDL blood, Female, Health Services statistics & numerical data, Heart Disease Risk Factors, Hospitalization statistics & numerical data, Humans, Male, Medication Therapy Management organization & administration, Middle Aged, Motivational Interviewing, Patient Acceptance of Health Care statistics & numerical data, Polypharmacy, Diabetes Mellitus therapy, Emergency Service, Hospital statistics & numerical data, Patient Care Team organization & administration, Pharmacists organization & administration, Primary Health Care organization & administration
- Abstract
Background: Pharmacists are effective at improving control of cardiovascular risk factors, but it less clear whether these improvements translate into less emergency department (ED) use and fewer hospitalizations. The UCMyRx program embed pharmacists in primary care., Objective: The objective of this study was to examine if the integration of pharmacists into primary care was associated with lower ED and hospital use for patients with diabetes., Design: This was a quasi-experimental study with a comparator group., Subjects: The analytic sample included patients with diabetes with uncontrolled cardiovascular risk factors (A1C >9%, blood pressure >140/90 mm Hg, low-density lipoprotein-cholesterol >130 mg/dL) who had 1 or more visits in either a UCMyRx (648 patients, 14 practices) or usual care practice (1944 patients, 14 practices)., Measures: Our outcomes were ED and hospitalization rates as measured before and after the consultations between UCMyRx and usual care. Our predictor variable was the pharmacist consultation. Poisson generalized estimating equations model was used to estimate the adjusted predicted change in utilization before and after the pharmacist consultation. The Average Treatment Effect on the Treated was estimated., Results: In models adjusted, the adjusted mean predicted number of emergency department visits/month during the year before the consultation was 0.09 among UCMyRx patients. During the year after initiating the care with the pharmacists, this rate decreased to an adjusted mean monthly rate of 0.07, with an Average Treatment Effect on the Treated=0.021 (P=0.035), a predicted reduction of 21% in emergency department visits associated with the clinical pharmacist consults. There was a nonsignificant predicted 3.2% reduction in hospitalizations over time for patients in the UCMyRx program., Conclusion: Clinical pharmacists are an important addition to clinical care teams in primary care practices and significantly decreased utilization of the ED among patients with poorly controlled diabetes., Competing Interests: G.M. was supported by NIA Paul B. Beeson Career Development Award (K23 AG042961-01). C.M.M. received support from the University of California at Los Angeles (UCLA), Resource Centers for Minority Aging Research Center for Health Improvement of Minority Elderly under National Institutes of Health (NIH)/NIA under Grant P30AG021684, by the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) of the NIH under Grant R18DK105464, the Centers for Disease Control and Prevention (CDC) under Grant U18DP006140 and from NIH/National Center for Advancing Translational Sciences UCLA Clinical and Translational Science Institute under Grant UL1TR001881. She holds the Barbara A. Levey and Gerald S. Levey Endowed Chair in Medicine, which partially supported her work. C.M.M. is a member of the United States Preventive Services Task Force (USPSTF). This article does not necessarily represent the views and policies of the USPSTF. The remaining authors declare no conflict of interest., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
12. A Collaboration Among Primary Care-Based Clinical Pharmacists and Community-Based Health Coaches.
- Author
-
Sorensen A, Grotts JF, Tseng CH, Moreno G, Maranon R, Whitmire N, Viramontes O, Atkins S, Sefilyan E, Simmons JW, and Mangione CM
- Subjects
- Aged, 80 and over, Drug-Related Side Effects and Adverse Reactions prevention & control, Electronic Health Records statistics & numerical data, Female, Humans, Los Angeles, Male, Patient Readmission statistics & numerical data, Retrospective Studies, Cooperative Behavior, House Calls, Medication Reconciliation, Nurses, Community Health, Pharmacists, Primary Health Care
- Abstract
Background/objectives: Medication discrepancies and adverse drug events are common following hospital discharge. This study evaluates whether a collaboration between community-based health coaches and primary care-based pharmacists was associated with a reduction in inpatient utilization following hospitalization., Design: Retrospective cohort study using propensity score matching., Setting: Urban academic medical center and surrounding community., Participants: Intervention patients (n = 494) were adults aged 65 and older admitted to the University of California, Los Angeles (UCLA) Ronald Reagan Medical Center during the study period and who met study inclusion criteria. A matched-control group was composed of patients with similar demographic and clinical characteristics who were admitted to the study site during the study period but who received usual care (n = 2,470). A greedy algorithm approach was used to conduct the propensity score match., Intervention: Following acute hospitalization, a health coach conducted a home visit and transmitted all medication-related information to a pharmacist based in a primary care practice. The pharmacist compared this information with the patient's electronic medical record medication list and consulted with the patient's primary care provider to optimize medication management., Measurements: Thirty-day readmissions (primary outcome), 60- and 90-day readmissions, and 30-day emergency department (ED) visits (secondary outcomes) to UCLA Health., Results: Among 494 patients who received the intervention, 307 (62.1%) were female with a mean age of 83.0 years (interquartile range [IQR] = 76-90 years). Among 2,470 matched-control patients, 1,541 (62.4%) were female with a mean age of 82.7 years (IQR = 74.9-89.5 years). For the propensity score match, standardized mean differences were below .1 for 23 of 25 variables, indicating good balance. Patients who received this intervention had a significantly lower predicted probability of being readmitted within 30 days compared with matched-control patients (10.6%; 95% confidence interval [CI] = 7.9-13.2) vs 21.4%; 95% CI = 19.8-23.0; P value < .001)., Conclusion: A home visit conducted by a health coach combined with a medication review by a primary care-based pharmacist may prevent subsequent inpatient utilization., (© 2020 The American Geriatrics Society.)
- Published
- 2021
- Full Text
- View/download PDF
13. Primary care provider adherence to an alert for intensification of diabetes blood pressure medications before and after the addition of a "chart closure" hard stop.
- Author
-
Ramirez M, Maranon R, Fu J, Chon JS, Chen K, Mangione CM, Moreno G, and Bell DS
- Subjects
- Alert Fatigue, Health Personnel prevention & control, Blood Pressure, Electronic Health Records, Humans, Antihypertensive Agents therapeutic use, Decision Support Systems, Clinical, Diabetes Complications drug therapy, Guideline Adherence, Hypertension drug therapy, Medical Order Entry Systems, Physicians, Primary Care
- Abstract
Objective: To evaluate provider responses to a narrowly targeted "Best Practice Advisory" (BPA) alert for the intensification of blood pressure medications for persons with diabetes before and after implementation of a "chart closure" hard stop, which is non-interruptive but demands an action or dismissal before the chart can be closed., Materials and Methods: We designed a BPA that fired alerts within an electronic health record (EHR) system during outpatient encounters for patients with diabetes when they had elevated blood pressures and were not on angiotensin receptor blocking medications. The BPA alerts were implemented in eight primary care practices within UCLA Health. We compared data on provider responses to the alerts before and after implementing a "chart closure" hard stop, and we conducted chart reviews to adjudicate each alert's appropriateness., Results: Providers responded to alerts more often after the "chart closure" hard stop was implemented (P < .001). Among 284 alert firings over 16 months, we judged 107 (37.7%) to be clinically unnecessary or inappropriate based on chart review. Among the remainder, which represent clear opportunities for treatment, providers ordered the indicated medication more often (41% vs 75%) after the "chart closure" hard stop was implemented (P = .001)., Discussion: The BPA alerts for diabetes and blood pressure control achieved relatively high specificity. The "chart closure" hard stop improved provider attention to the alerts and was effective at getting patients treated when they needed it., Conclusion: Targeting specific omitted medication classes can produce relatively specific alerts that may reduce alert fatigue, and using a "chart closure" hard stop may prompt providers to take action without excessively disrupting their workflow.
- Published
- 2018
- Full Text
- View/download PDF
14. Physician experiences with clinical pharmacists in primary care teams.
- Author
-
Moreno G, Lonowski S, Fu J, Chon JS, Whitmire N, Vasquez C, Skootsky SA, Bell DS, Maranon R, and Mangione CM
- Subjects
- Clinical Competence, Cooperative Behavior, Cross-Sectional Studies, Drug Prescriptions, Female, Humans, Interdisciplinary Communication, Interviews as Topic, Los Angeles, Male, Qualitative Research, Specialization, Attitude of Health Personnel, Health Knowledge, Attitudes, Practice, Medication Therapy Management, Patient Care Team, Pharmacists psychology, Physicians psychology, Primary Health Care
- Abstract
Background: Improving medication management is an important component of comprehensive care coordination for health systems. The Managing Your Medication for Education and Daily Support (MyMeds) medication management program at the University of California Los Angeles addresses medication management issues by embedding trained clinical pharmacists in primary care practice teams., Objectives: The aim of this work was to examine and explore physician opinions about the clinical pharmacist program and identify common themes among physician experiences as well as barriers to integration of clinical pharmacists into primary care practice teams., Methods: We conducted a mixed quantitative-qualitative methods study consisting of a cross-sectional physician survey (n = 69) as well as semistructured one-on-one physician interviews (n = 13). Descriptive statistics were used to summarize survey responses, and standard qualitative content-analysis methods were used to identify major themes from the interviews., Results: The survey response rate was 61%; 13 interviews were conducted. Ninety percent of survey respondents agreed or strongly agreed that having the pharmacist in the office makes management of the patient's medication more efficient, 93% agreed or strongly agreed that pharmacist recommendations are clinically helpful, 71% agreed or strongly agreed that having access to a pharmacist has increased their knowledge about medications they prescribe, and 75% agreed or strongly agreed that having a pharmacist as part of the primary care team has made their job easier. Qualitative interviews corroborated survey findings, and physicians highlighted the value of the clinical pharmacist's communication, team care and expanded roles, and medication management., Conclusion: Primary care physicians valued the integrated pharmacy program highly, particularly its features of strong communication, expanded roles, and medication management. Pharmacists were viewed as integral members of the health care team., (Copyright © 2017 American Pharmacists Association®. Published by Elsevier Inc. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
15. Cardiometabolic Effects of Chronic Hyperandrogenemia in a New Model of Postmenopausal Polycystic Ovary Syndrome.
- Author
-
Dalmasso C, Maranon R, Patil C, Bui E, Moulana M, Zhang H, Smith A, Yanes Cardozo LL, and Reckelhoff JF
- Subjects
- Animals, Body Weight physiology, Cardiovascular Diseases metabolism, Disease Models, Animal, Female, Glucose Tolerance Test, Insulin Resistance physiology, Rats, Rats, Sprague-Dawley, Blood Glucose metabolism, Hyperandrogenism metabolism, Polycystic Ovary Syndrome metabolism, Postmenopause
- Abstract
Postmenopausal women who have had polycystic ovary syndrome (PCOS) and chronic hyperandrogenemia may be at a greater risk for cardiovascular disease than normoandrogenemic postmenopausal women. The cardiometabolic effect of chronic hyperandrogenemia in women with PCOS after menopause is unclear. The present study was performed to test the hypothesis that chronic hyperandrogenemia in aging female rats would have more deleterious effects on metabolic function, blood pressure, and renal function than in normoandrogenemic age-matched females. Female Sprague Dawley were implanted continuously, beginning at 4-5 weeks, with dihydrotestosterone (postmenopausal hyperandrogenemic female [PMHAF]) or placebo pellets (controls), and were studied at 13 months of age. Plasma DHT was 3-fold higher, and estradiol was 90% lower in PMHAF than controls. Body weights were higher; EchoMRI showed greater fat and lean mass; and computed tomography showed more sc and visceral adiposity in PMHAF, but with similar femur length compared with controls. Insulin resistance was present in PMHAF with higher plasma insulin, normal fasting blood glucose, abnormal oral glucose tolerance test, and higher nonfasting blood glucose. Blood pressure (radiotelemetry) was significantly higher and heart rate was lower, and renal function (glomerular filtration rate) was reduced by 40% in PMHAF. Thus the aging chronically hyperandrogenemic female rat is a new model of postmenopausal PCOS, which exhibits insulin resistance and visceral obesity, hypertension, and impairment in renal function. This new model provides a unique tool to study the deleterious effects of chronic androgen excess in postmenopausal females rats.
- Published
- 2016
- Full Text
- View/download PDF
16. 20-HETE and CYP4A2 ω-hydroxylase contribute to the elevated blood pressure in hyperandrogenemic female rats.
- Author
-
Dalmasso C, Maranon R, Patil C, Moulana M, Romero DG, and Reckelhoff JF
- Subjects
- Androgens toxicity, Animals, Body Weight genetics, Cytochrome P-450 Enzyme System genetics, Dihydrotestosterone toxicity, Female, Gene Deletion, Gene Knockout Techniques, Hydroxyeicosatetraenoic Acids genetics, Hyperandrogenism genetics, Hypertension genetics, Microcirculation genetics, Rats, Rats, Inbred Dahl, Renal Circulation genetics, Steroids blood, Cytochrome P-450 Enzyme System metabolism, Hydroxyeicosatetraenoic Acids metabolism, Hyperandrogenism metabolism, Hypertension metabolism
- Abstract
In male rats, androgen supplements increase 20-hydroxyeicosatetraenoic acid (20-HETE) via cytochrome P-450 (CYP)4A ω-hydroxylase and cause an increase in blood pressure (BP). In the present study, we determined the roles of 20-HETE and CYP4A2 on the elevated BP in hyperandrogenemic female rats. Chronic dihydrotestosterone (DHT) increased mean arterial pressure (MAP) in female Sprague-Dawley rats (96 ± 2 vs. 108 ± 2 mmHg, P < 0.05) and was associated with increased renal microvascular CYP4A2 mRNA expression (15-fold), endogenous renal 20-HETE (5-fold), and ω-hydroxylase activity (3-fold). Chronic DHT also increased MAP in low salt-fed Dahl salt-resistant female rats (81 ± 4 vs. 95 ± 1 mmHg, P < 0.05) but had no effect on MAP in Dahl salt-sensitive female rats (154 ± 3 vs. 153 ± 3 mmHg), which are known to be 20-HETE deficient. To test the role of CYP4A2, female CYP4A2(-/-) and SS.5(Bn) (wild type) rats were treated with DHT. DHT increased MAP in SS.5(Bn) female rats (104 ± 1 vs. 128 ± 1 mmHg, P < 0.05) but had no effect in CYP4A2(-/-) female rats (118 ± 1 vs. 120 ± 1 mmHg). Renal microvascular 20-HETE was reduced in control CYP4A2(-/-) female rats and was increased with DHT in SS.5(Bn) female rats (6-fold) but not CYP4A2(-/-) female rats. ω-Hydroxylase activity was 40% lower in control CYP4A2(-/-) female rats than in SS.5(Bn) female rats, and DHT decreased ω-hydroxylase activity in SS.5(Bn) female rats (by 50%) but significantly increased ω-hydroxylase activity in CYP4A2(-/-) female rats (3-fold). These data suggest that 20-HETE via CYP4A2 contributes to the elevation in BP in hyperandrogenemic female rats. The data also suggest that 20-HETE synthesis inhibition may be effective in treating the elevated BP in women with hyperandrogenemia, such as women with polycystic ovary syndrome., (Copyright © 2016 the American Physiological Society.)
- Published
- 2016
- Full Text
- View/download PDF
17. Roles for the sympathetic nervous system, renal nerves, and CNS melanocortin-4 receptor in the elevated blood pressure in hyperandrogenemic female rats.
- Author
-
Maranon R, Lima R, Spradley FT, do Carmo JM, Zhang H, Smith AD, Bui E, Thomas RL, Moulana M, Hall JE, Granger JP, and Reckelhoff JF
- Subjects
- Adrenergic Antagonists pharmacology, Animals, Dihydrotestosterone, Disease Models, Animal, Female, Hormone Antagonists, Hyperandrogenism chemically induced, Hyperandrogenism drug therapy, Hyperandrogenism metabolism, Hyperandrogenism physiopathology, Hypertension metabolism, Hypertension physiopathology, Hypertension prevention & control, Hypothalamus drug effects, Polycystic Ovary Syndrome chemically induced, Polycystic Ovary Syndrome drug therapy, Polycystic Ovary Syndrome metabolism, Polycystic Ovary Syndrome physiopathology, Rats, Sprague-Dawley, Receptor, Melanocortin, Type 4 antagonists & inhibitors, Signal Transduction, Sympathectomy, Sympathetic Nervous System drug effects, Sympathetic Nervous System surgery, Time Factors, Arterial Pressure drug effects, Hyperandrogenism complications, Hypertension etiology, Hypothalamus metabolism, Hypothalamus physiopathology, Kidney innervation, Polycystic Ovary Syndrome complications, Receptor, Melanocortin, Type 4 metabolism, Sympathetic Nervous System physiopathology
- Abstract
Women with polycystic ovary syndrome (PCOS) have hyperandrogenemia and increased prevalence of risk factors for cardiovascular disease, including elevated blood pressure. We recently characterized a hyperandrogenemic female rat (HAF) model of PCOS [chronic dihydrotestosterone (DHT) beginning at 4 wk of age] that exhibits similar characteristics as women with PCOS. In the present studies we tested the hypotheses that the elevated blood pressure in HAF rats is mediated in part by sympathetic activation, renal nerves, and melanocortin-4 receptor (MC4R) activation. Adrenergic blockade with terazosin and propranolol or renal denervation reduced mean arterial pressure (MAP by telemetry) in HAF rats but not controls. Hypothalamic MC4R expression was higher in HAF rats than controls, and central nervous system MC4R antagonism with SHU-9119 (1 nmol/h icv) reduced MAP in HAF rats. Taking a genetic approach, MC4R null and wild-type (WT) female rats were treated with DHT or placebo from 5 to 16 wk of age. MC4R null rats were obese and had higher MAP than WT control rats, and while DHT increased MAP in WT controls, DHT failed to further increase MAP in MC4R null rats. These data suggest that increases in MAP with chronic hyperandrogenemia in female rats are due, in part, to activation of the sympathetic nervous system, renal nerves, and MC4R and may provide novel insights into the mechanisms responsible for hypertension in women with hyperandrogenemia such as PCOS., (Copyright © 2015 the American Physiological Society.)
- Published
- 2015
- Full Text
- View/download PDF
18. Sex and gender differences in control of blood pressure.
- Author
-
Maranon R and Reckelhoff JF
- Subjects
- Androgens physiology, Estrogens physiology, Female, Gonadal Steroid Hormones physiology, Humans, Hypertension physiopathology, Male, Sex Chromosomes physiology, Blood Pressure physiology, Cardiovascular Diseases physiopathology, Sex Characteristics
- Abstract
In recent years, the interest in studying the impact of sex steroids and gender on the regulation of blood pressure and cardiovascular disease has been growing. Women are protected from most cardiovascular events compared with men until after menopause, and postmenopausal women are at increased risk of cardiovascular complications compared with premenopausal women. The pathophysiological mechanisms have not been elucidated, but are not likely to be as simple as the presence or absence of oestrogens, since hormone replacement therapy in elderly women in the Women's Health Initiative or HERS (Heart and Estrogen/progestin Replacement Study) did not provide primary or secondary prevention against cardiovascular events. Men are also thought to be at risk of cardiovascular disease at earlier ages than women, and these mechanisms too are not likely to be as simple as the presence of testosterone, since androgen levels fall in men with cardiovascular and other chronic diseases. In fact, many investigators now believe that it is the reduction in androgen levels that frequently accompanies chronic disease and may exacerbate cardiovascular disease in men. In the present review, the roles of sex steroids and gender in mediating or protecting against hypertension and cardiovascular disease will be discussed.
- Published
- 2013
- Full Text
- View/download PDF
19. Protective role of testosterone in ischemia-reperfusion-induced acute kidney injury.
- Author
-
Soljancic A, Ruiz AL, Chandrashekar K, Maranon R, Liu R, Reckelhoff JF, and Juncos LA
- Subjects
- Acute Kidney Injury physiopathology, Anastrozole, Animals, Aromatase Inhibitors pharmacology, Cell Adhesion Molecules urine, Creatinine blood, Male, Nitriles pharmacology, Orchiectomy, Proteinuria blood, Rats, Rats, Sprague-Dawley, Renal Circulation physiology, Reperfusion Injury physiopathology, Testosterone blood, Testosterone therapeutic use, Triazoles pharmacology, Tumor Necrosis Factor-alpha metabolism, Vascular Endothelial Growth Factor A metabolism, Acute Kidney Injury prevention & control, Reperfusion Injury prevention & control, Testosterone pharmacology
- Abstract
Men are at greater risk for renal injury and dysfunction after acute ischemia-reperfusion (I/R) than are women. Studies in animals suggest that the reason for the sex difference in renal injury and dysfunction after I/R is the protective effect of estrogens in females. However, a reduction in testosterone in men is thought to play an important role in mediating cardiovascular and renal disease, in general. In the present study, we tested the hypothesis that I/R of the kidney reduces serum testosterone, and that contributes to renal dysfunction and injury. Male rats that were subjected to renal ischemia of 40 min followed by reperfusion had a 90% reduction in serum testosterone by 3 h after reperfusion that remained at 24 h. Acute infusion of testosterone 3 h after reperfusion attenuated the increase in plasma creatinine and urinary kidney injury molecule-1 (KIM-1) at 24 h, prevented the reduction in outer medullary blood flow, and attenuated the increase in intrarenal TNF-α and the decrease in intrarenal VEGF at 48 h. Castration of males caused greater increases in plasma creatinine and KIM-1 at 24 h than in intact males with renal I/R, and treatment with anastrozole, an aromatase inhibitor, plus testosterone almost normalized plasma creatinine and KIM-1 in rats with renal I/R. These data show that renal I/R is associated with sustained reductions in testosterone, that testosterone repletion protects the kidney, whereas castration promotes renal dysfunction and injury, and that the testosterone-mediated protection is not conferred by conversion to estradiol.
- Published
- 2013
- Full Text
- View/download PDF
20. Gram stain as a predictor of urinary infections in children under 2 years.
- Author
-
Rodriguez MJ, Rodriguez A, and Maranon R
- Subjects
- Child, Preschool, Female, Humans, Infant, Male, Predictive Value of Tests, Retrospective Studies, Urinary Tract Infections microbiology, Gentian Violet, Phenazines, Staining and Labeling methods, Urinary Tract Infections diagnosis
- Published
- 2011
21. Developing a disaster preparedness campaign targeting low-income Latino immigrants: focus group results for project PREP.
- Author
-
Eisenman DP, Glik D, Maranon R, Gonzales L, and Asch S
- Subjects
- Adult, Female, Focus Groups, Humans, Male, Disaster Planning organization & administration, Emigrants and Immigrants, Hispanic or Latino, Poverty
- Abstract
Low-income immigrant Latinos are particularly vulnerable to disasters because they are both ill-prepared and disproportionately affected. Disaster preparedness programs that are culturally appropriate must be developed and tested. To develop such a program, we conducted 12 focus groups with low-income immigrant Latinos to understand their perceptions and understanding of disaster preparedness, and facilitators and obstacles to it. Participants were concerned about remaining calm during an earthquake. Obstacles to storage of disaster supplies in a kit and developing a family communication plan were mentioned frequently. Misunderstandings were voiced about the proper quantity of water to store and about communication plans. Several focus groups spontaneously suggested small group discussions (platicas) as a way to learn about disaster preparedness. They wanted specific help with building their family communication plans. They rated promotoras de salud highly as potential teachers. Results will guide the development of a disaster preparedness program tailored to the needs of low-income Latino immigrants.
- Published
- 2009
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.