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Matos AP, Castro IV, Castro PT, Ribeiro G, Augusto A, Fazecas T, Nogueira R, Lopes J, Arcoverde V, de Melo JVC, Werner H. Abstracts of the 34th World Congress on Ultrasound in Obstetrics and Gynecology, 15-18 September 2024, Budapest, Hungary. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2024; 64 Suppl 1:121. [PMID: 39249789 DOI: 10.1002/uog.28063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/10/2024]
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Matos AP, Castro IV, Castro PT, Ribeiro G, Augusto A, Junior EA, Fazecas T, Lopes J, Arcoverde V, de Melo JVC, Werner H. Abstracts of the 34th World Congress on Ultrasound in Obstetrics and Gynecology, 15-18 September 2024, Budapest, Hungary. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2024; 64 Suppl 1:121. [PMID: 39249727 DOI: 10.1002/uog.28062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/10/2024]
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Kanagasabai U, Thorsen V, Zhu L, Annor FB, Chiang L, McOwen J, Augusto A, Manuel P, Kambona C, Coomer R, Kamagate F, Ramphalla P, Denhard L, Cain M, Hegle J, de Barros RB, Saenz S, Kamami M, Patel P. Adverse childhood experiences, HIV and sexual risk behaviors - Five sub-Saharan countries, 2018-2020. CHILD ABUSE & NEGLECT 2024; 150:106541. [PMID: 38114359 DOI: 10.1016/j.chiabu.2023.106541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/31/2023] [Accepted: 11/07/2023] [Indexed: 12/21/2023]
Abstract
BACKGROUND Adverse childhood experiences (ACEs) have been shown to have negative, lasting effects on health including increasing the likelihood of engaging in sexual risk behaviors. OBJECTIVE This study aimed to identify associations between exposures to ACEs and sexual risk behaviors and HIV service utilization among young people. PARTICIPANTS AND SETTING A sample of 8023 sexually active young people (19-24 year olds) from five sub-Saharan African countries participated Violence Against Children and Youth Surveys (VACS). METHODS Descriptive analysis of demographic variables, individual ACEs, cumulative ACEs, sexual risk behaviors, HIV testing, antiretroviral treatment (ART) and Antenatal Care (ANC) attendance were completed. Bivariate and multivariable logistic regression analyses were conducted to assess the associations between both individual and cumulative ACEs, sexual HIV risk behaviors, and service utilization while controlling for important covariates such as demographic, having ever been pregnant, had an STI, and used contraception. RESULTS Exposure to three or more ACEs was higher among males (26.1 %) compared to females (21.3 %); p = 0.003. The most prominent sexual risk behavior for females was having sexual partners who were at least 5 years older (45.7 % compared to males 3.7 %; p < 0.0001) whereas in males it was no or infrequent condom use (45.3 % compared to females 30.1 %; p < 0.0001). Males and females exposed to childhood sexual violence had seven and four times the odds of engaging in transactional sex (aOR = 7.34, 95 % CI: [3.5-15.0]) and (aOR =3.75, 95 % CI: [2.3-6.2], respectively. Females exposed to three or more ACEs were four times more likely to engage in transactional sex (aOR = 4.85, 95 %, CI: [1.6-14.4]) compared to those who did not experience any ACEs. Males exposed to three or more ACEs were two times more likely to engage in early sexual debut (aOR = 2.2, 95 % CI: [1.3-3.4]),]) compared to those who did not experience any ACEs. Females who had witnessed IPV or violence in the community had significantly higher odds of getting tested for HIV (aOR = 2.16, 95 % CI: [1.63-2.87]) and (aOR = 1.36, 95 % CI: [1.03-1.81]), respectively. CONCLUSIONS This study demonstrated that experiencing ACEs during childhood is associated with higher HIV risk behaviors in sub-Saharan Africa (SSA) with unique differences between males and females.
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Denhard L, Brown C, Kanagasabai U, Thorsen V, Kambona C, Kamagate F, Ramphalla P, Benevides R, Kamami M, McOwen J, Augusto A, Manuel P, Coomer R, Matthews S, Patel P, Annor FB. Service-seeking behaviors among male victims of violence in five African countries: The effects of positive and adverse childhood experiences. CHILD ABUSE & NEGLECT 2024; 150:106452. [PMID: 37704546 PMCID: PMC11244758 DOI: 10.1016/j.chiabu.2023.106452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/28/2023] [Accepted: 09/05/2023] [Indexed: 09/15/2023]
Abstract
BACKGROUND Violence against boys and men is widely under-reported. Boys and men face unique and gendered barriers to accessing services following experiences of violence. PARTICIPANTS AND SETTING The study is a secondary data analysis of five nationally representative population-based Violence Against Children and Youth Surveys (VACS) conducted in Kenya (2019), Côte d'Ivoire (2018), Lesotho (2018), Mozambique (2019), and Namibia (2019). Analysis was limited to males between 18 and 24 years who experienced lifetime physical or sexual violence. OBJECTIVE AND METHODS We analyzed the association between positive and adverse childhood experiences (PCEs and ACEs), and seeking post-violence services among males using bivariate chi-squared tests and multivariable logistic regression. RESULTS 8.02 % (5.55-10.50 %) of male victims between the ages of 18 and 24 sought services for any lifetime physical or sexual violence. Witnessing interparental violence and experiencing death of one or both parents were each associated with increased odds of having sought post-violence services (aOR 2.43; 95 % CI: 1.25-4.79; aOR 2.27; 95 % CI: 1.14-4.50), controlling for education, violence frequency, and violence type. High parental monitoring was associated with increased odds of service seeking (aOR 1.79; 95 % CI: 1.02-3.16), while strong father-child relationship was associated with lower odds (aOR 0.45; 95 % CI: 0.23-0.89). CONCLUSION These findings contribute to limited research on service-seeking behaviors among men and boys. While some parent-youth relationship factors were associated with higher odds of service-seeking, the outcome remained rare. Age and gender-related barriers should be addressed where post-violence care services are offered.
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Miedema SS, Stamatakis C, Tracy A, Hegle J, Kamagate MF, McOwen J, Augusto A, Manuel P, Coomer R, Kambona C, Ramphalla P, Niolon P, Patel P, Annor FB. Patterns of adverse childhood experiences and their associations with mental distress, substance use and sexual risk behaviors in Sub-Saharan Africa. CHILD ABUSE & NEGLECT 2024; 150:106494. [PMID: 37806930 PMCID: PMC11264303 DOI: 10.1016/j.chiabu.2023.106494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 08/02/2023] [Accepted: 09/29/2023] [Indexed: 10/10/2023]
Abstract
BACKGROUND Multiple adverse childhood experiences (ACEs) are associated with poor sexual and mental health outcomes in low- and middle-income countries (LMICs). Less well understood is how discrete and gendered clustering of ACEs may influence health. OBJECTIVE To assess how multiple ACEs co-occur and how dominant patterns of co-occurrence are associated with mental distress, substance use, and sexual risk behaviors among young women and men in Sub-Saharan Africa. PARTICIPANTS AND SETTING We used pooled data of young men and women aged 19-24 from comparable, nationally representative Violence Against Children and Youth Surveys (VACS) conducted in Cote d'Ivoire, Kenya, Lesotho, Mozambique, and Namibia (nf = 7183; nm = 2207). METHODS We estimated sex-disaggregated latent classes of six ACEs among young women and men. We ran Bolck-Croon-Hagenaars (BCH) distal outcome analysis to test the sex-stratified relationships between ACEs latent classes and health outcomes. RESULTS A six class solution best fit the female data. Classes included witnessing violence and experiencing physical violence (PV); experiencing PV; high ACEs; witnessing community violence; orphanhood; and low ACEs exposure. Among males, the best-fitting three-class solution included experiencing PV and witnessing community violence; high ACEs; and low ACEs exposure. Membership in the high ACEs class was associated with mental distress among females and males, and substance use among males. No differences in sexual risk behavior were identified by class membership among either females or males. CONCLUSIONS Discrete clusters of co-occurring ACEs are associated with elevated odds of mental distress among females, and mental distress and substance use among males. Preventing ACEs may improve mental health among young women and men in LMICs in Sub-Saharan Africa.
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Amene EW, Annor FB, Gilbert LK, McOwen J, Augusto A, Manuel P, N'gouanma Nobah MTV, Massetti GM. Prevalence of Adverse Childhood Experiences in sub-Saharan Africa: A multicountry analysis of the Violence Against Children and Youth Surveys (VACS). CHILD ABUSE & NEGLECT 2024; 150:106353. [PMID: 37482505 PMCID: PMC11330677 DOI: 10.1016/j.chiabu.2023.106353] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/30/2023] [Accepted: 07/10/2023] [Indexed: 07/25/2023]
Abstract
BACKGROUND Adverse Childhood Experiences are traumatic events early in life and have been associated with significant negative health outcomes. OBJECTIVE To estimate the prevalence of ACEs in five low- and middle-income sub-Saharan African countries. PARTICIPANTS AND SETTING Nationally representative data from the Cote d'Ivoire (2018), Kenya (2019), Lesotho (2018), Mozambique (2019), and Namibia (2019) Violence Against Children and Youth Surveys (VACS) were used. Analyses were restricted to youth ages 18-24 years (n = 8766 females and 2732 males). METHODS VACS data were analyzed to generate sex-stratified weighted prevalence of individual ACEs (including sexual, physical, and emotional violence; witnessing interparental violence and violence in the community; and orphanhood) and aggregate ACEs (total ACEs; 0, 1-2, and 3 or more), for each country and combined. RESULTS The most common type of ACEs among both females and males was witnessing physical violence (males: 55.0 % [95 % CI: 51.1-58.8] and females: 37.2 % [95 % CI = 34.3-40.1]) followed by experiencing physical violence (males: 49.7 % [95 % CI = 45.5-53.9] and in females: 36.5 % [95 % CI = 33.8-39.2]). Prevalence of sexual violence was significantly higher in females than in males (16.0 % [95 % CI = 13.9-18.2] vs 8.3 % [95 % CI = 7.0-9.8]; p < 0.001). About 72 % of females and 82 % of males have experienced at least one form of ACE with 20 % of females and 24.2 % of males experiencing 3 or more ACEs. CONCLUSION This study demonstrated that majority of the children in countries in sub-Saharan Africa have experienced multiple ACEs in their lifetime. Understanding the extent of the problem will help design early interventions to reduce childhood exposure to ACEs or mitigate against the harmful impact of ACEs.
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Seya MKS, Matthews S, Zhu L, Brown C, Lefevre A, Agathis N, Chiang LF, Annor FB, McOwen J, Augusto A, Manuel P, Kamagate MF, Nobah MT, Coomer R, Kambona C, Low A. Parenting-related positive childhood experiences, adverse childhood experiences, and mental health-Four sub-Saharan African countries. CHILD ABUSE & NEGLECT 2024; 150:106493. [PMID: 37839988 PMCID: PMC11264190 DOI: 10.1016/j.chiabu.2023.106493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 09/21/2023] [Accepted: 09/29/2023] [Indexed: 10/17/2023]
Abstract
BACKGROUND Adverse Childhood Experiences (ACEs) are associated with poor mental health outcomes and risk-taking behaviors. Positive childhood experiences (PCEs) may mitigate these negative impacts. OBJECTIVE This study 1) assessed the associations between ACEs and negative health outcomes and risk-taking behaviors among young adults, and 2) evaluated whether - and which - PCEs moderate the association between ACEs and these outcomes in sub-Saharan Africa. METHODS This multi-country analysis combined cross-sectional representative survey data from young adults, ages 18-24 years, from the 2019 Kenya, 2018 Lesotho, 2019 Mozambique, and 2019 Namibia Violence Against Children and Youth Surveys. The association between experiencing any ACEs and each health outcome was assessed using Wald's chi-square tests. Multivariable logistic regression analyses assessed the association between each PCE and each outcome of interest. RESULTS Females who experienced any ACEs had higher odds of experiencing moderate to severe mental distress (aOR = 2.7, 95%CI: 1.9, 3.9). Males who experienced any ACEs had higher odds of experiencing suicidal/self-harm behaviors (aOR = 6.7, 95%CI: 2.8, 16.0) and substance use (aOR = 2.5, 95%CI: 1.4, 4.2). In females, strong mother-child relationship was protective against moderate to severe mental distress (aOR = 0.7, 95%CI: 0.6, 0.9), suicidal/self-harm behaviors (aOR = 0.6, 95%CI: 0.4, 0.9), and substance use (aOR = 0.6, 95%CI: 0.4, 0.9). For males, a strong mother-child relationship was protective against suicidal/self-harm behaviors (aOR = 0.5, 95%CI: 0.2, 0.9), and a strong father-child relationship was protective against suicidal/self-harm behaviors (aOR = 0.4, 95%CI: 0.2, 0.7) and substance use (aOR = 0.6, 95%CI: 0.4, 0.8). CONCLUSIONS Strong parenting programs may likely play an important role in improving the psychosocial health of young adults.
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Augusto A, Augusto O, Taquibo A, Nhachigule C, Siyawadya N, Gudo ES. High frequency of HBV in HIV-infected prisoners in Mozambique. Int J Prison Health 2019; 15:58-65. [PMID: 30827158 DOI: 10.1108/ijph-11-2017-0056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PURPOSE The purpose of this paper is to determine the prevalence of hepatitis B virus (HBV) among 448 HIV-infected prisoners from 32 prisons in Mozambique. DESIGN/METHODOLOGY/APPROACH All HIV seropositive prisoners were screened for HBV. FINDINGS Of the 448 HIV seropositive prisoners, 51 (11.4 percent, 95%CI: 9.3-13.9 percent) were HBsAg-positive and was significantly higher in prisoners aged<25 years. ORIGINALITY/VALUE Data from this study show for the first time that the frequency of HBV among HIV-infected prisoners is high, suggesting that immediate interventions are needed during incarceration.
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Caldeira D, Barra M, Ferreira A, Rocha A, Augusto A, Pinto FJ, Costa J, Ferreira JJ. Systematic review with meta-analysis: the risk of major gastrointestinal bleeding with non-vitamin K antagonist oral anticoagulants. Aliment Pharmacol Ther 2015; 42:1239-49. [PMID: 26434935 DOI: 10.1111/apt.13412] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2015] [Revised: 07/31/2015] [Accepted: 09/02/2015] [Indexed: 12/30/2022]
Abstract
BACKGROUND Gastrointestinal (GI) bleeding is a common complication among anticoagulated patients. Non-vitamin K antagonist oral anticoagulants (NOACs) are associated with increased risk of GI (major and clinically relevant non-major) bleeding. However, more information is needed regarding severe events. AIM To evaluate the risk of NOACs major GI bleeding. METHODS We searched for phase III randomised clinical trials (RCT) evaluating NOACs (apixaban, dabigatran, edoxaban and rivaroxaban) and reporting major GI bleeding events, in MEDLINE, Cochrane Library, SciELO collection and Web of Science databases (July 2015). Meta-analysis was performed to estimate risk ratio (RR) and 95% confidence intervals (95% CIs). Heterogeneity was assessed with the I(2) test. RESULTS A total of 23 studies were included. Among patients with atrial fibrillation, the risk of major GI bleeding was not different between NOACs and vitamin K antagonists (VKA) (RR 1.08, 95% CI 0.85-1.36, I(2) = 78%; 5 RCTs) or acetylsalicylic acid (RR 0.78, 95% CI 0.36-1.72; 1 RCT). Similar results were found for patients undergoing orthopaedic surgery and those with venous thromboembolism. NOACs were not found to increase the risk compared to low-molecular-weight heparin (LWMH) alone (RR 1.42, 95% CI 0.55-3.71, I(2) = 7%; 8 RCTs), the sequential treatment with LMWH-VKA (RR 0.77, 95% CI 0.49-1.21, I(2) = 43%; 7 RCTs) or placebo (RR 1.48, 95% CI 0.15-14.84, I(2) = 21%; 2 RCTs). CONCLUSION Despite previous evidence supporting the association of non-vitamin K antagonist oral anticoagulants and overall GI bleeding, non-vitamin K antagonist oral anticoagulants are not associated with increased risk of major GI bleeding compared to other anticoagulant drugs (with known increased risk of these events).
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Mazzarelli CCM, Santos MR, Amorim RV, Augusto A. Effect of salinity on the metabolism and osmoregulation of selected ontogenetic stages of an amazon population of Macrobrachium amazonicum shrimp (Decapoda, Palaemonidae). BRAZ J BIOL 2015; 75:372-9. [DOI: 10.1590/1519-6984.14413] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 10/22/2013] [Indexed: 11/21/2022] Open
Abstract
Probably as a function of their wide geographical distribution, the different population of Macrobrachium amazonicum shrimp may present distinct physiological, biochemical, reproductive, behavioral, and ecological patterns. These differences are so accentuated that the existence of allopatric speciation has been suggested, although initial studies indicate that the genetic variability of populations happen at an intraspecific level. Among the biological responses described for M. amazonicum populations, those regarding osmoregulation and metabolism play a key role for being related to the occupation of diverse habitats. To this effect, we investigated osmoregulation through the role of free amino acids in cell volume control and metabolism, through oxygen consumption in larvae (zoeae I, II, V and IX) and/or post-larvae of a M. amazonicum population from Amazon, kept in aquaculture fish hatcheries in the state of São Paulo. The results add information regarding the existence of distinct physiological responses among M. amazonicum populations and suggest that possible adjustments to metabolism and to the use of free amino acids as osmolytes of the regulation of the larvae and post-larvae cell volume depend on the appearance of structures responsible for hemolymph osmoregulation like, for example, the gills. In this respect, we verified that zoeae I do not alter their metabolism due to the exposition to fresh or brackish water, but they reduce intracellular concentration of free amino acids when exposed to fresh water, what may suggest the inexistence or inefficient performance of the structures responsible for volume regulation and hemolymph composition. On the other hand, in zoeae II and V exposed to fresh and brackish water, metabolism alterations were not followed by changes in free amino acids concentration. Thus it is possible, as the structures responsible for osmoregulation and ionic regulation become functional, that the role of free amino acids gets diminished and oxygen consumption elevated, probably due to greater energy expenditure with the active transportation of salts through epithelial membranes. Osmotic challenges also seem to alter throughout development, given that in zoeae II oxygen consumption is elevated on brackish water of 18, but in zoeae V it happens in fresh water. After M. amazonicum metamorphosis, free amino acids begin to play an important role as intracellular osmolytes, because we verified an increase of up to 40% in post-larvae exposed to brackish water of 18. The main free amino acids involved in cell volume regulation of ontogenetic stages evaluated were the non essential ones: glutamic acid, glycine, alanine, arginine, and proline. Interestingly, larvae from estuarine population studied here survived until the zoeae V stage in fresh water, but in some populations far from the sea, zoeae die right after eclosion in fresh water or they do not reach zoeae III stage. In addition, given that in favorable conditions caridean shrimp larvae shorten their development, we may infer that the cultivation environment, in which larvae developed in the present work, was appropriate, because almost all zoeae VIII kept on brackish water underwent metamorphosis directly to post-larvae and did not go through zoeae IX stage.
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Bila DCA, Young P, Merks H, Vubil AS, Mahomed M, Augusto A, Abreu CM, Mabunda NJ, Brooks JI, Tanuri A, Jani IV. Evolution of primary HIV drug resistance in a subtype C dominated epidemic in Mozambique. PLoS One 2013; 8:e68213. [PMID: 23935858 PMCID: PMC3728366 DOI: 10.1371/journal.pone.0068213] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 05/28/2013] [Indexed: 11/18/2022] Open
Abstract
Objective In Mozambique, highly active antiretroviral treatment (HAART) was introduced in 2004 followed by decentralization and expansion, resulting in a more than 20-fold increase in coverage by 2009. Implementation of HIV drug resistance threshold surveys (HIVDR-TS) is crucial in order to monitor the emergence of transmitted viral resistance, and to produce evidence-based recommendations to support antiretroviral (ARV) policy in Mozambique. Methods World Health Organization (WHO) methodology was used to evaluate transmitted drug resistance (TDR) in newly diagnosed HIV-1 infected pregnant women attending ante-natal clinics in Maputo and Beira to non-nucleoside reverse transcriptase inhibitors (NNRTI), nucleoside reverse transcriptase inhibitors (NRTI) and protease inhibitors (PI). Subtypes were assigned using REGA HIV-1 subtyping tool and phylogenetic trees constructed using MEGA version 5. Results Although mutations associated with resistance to all three drug were detected in these surveys, transmitted resistance was analyzed and classified as <5% in Maputo in both surveys for all three drug classes. Transmitted resistance to NNRTI in Beira in 2009 was classified between 5–15%, an increase from 2007 when no NNRTI mutations were found. All sequences clustered with subtype C. Conclusions Our results show that the epidemic is dominated by subtype C, where the first-line option based on two NRTI and one NNRTI is still effective for treatment of HIV infection, but intermediate levels of TDR found in Beira reinforce the need for constant evaluation with continuing treatment expansion in Mozambique.
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Melis MS, Rocha ST, Augusto A. Steviol effect, a glycoside of Stevia rebaudiana, on glucose clearances in rats. BRAZ J BIOL 2009; 69:371-4. [DOI: 10.1590/s1519-69842009000200019] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2007] [Accepted: 12/29/2007] [Indexed: 11/22/2022] Open
Abstract
Stevia rebaudiana, a South American plant normally used as a natural herbal sweetener, has been suggested as exerting beneficial effects on human health, including as an antihypertensive and antihyperglycemic. The present experiment was undertaken to evaluate the renal excretion of steviol, the aglycone of several natural products extracted from the leaves of S. rebaudiana, and to clarify the actual participation of this compound on the renal excretion of glucose in rats, which has been previously suggested as the preferential action of steviol on the Na+-glucose renal tubular transport system. Steviol was obtained by enzymatic hydrolysis of stevioside with pectinase. Thirty normal male Wistar rats weighing 345 g were used. After a control period, steviol was infused iv at three doses (0.5, 1.0 and 3.0 mg.kg-1/h), according to classical clearance techniques. During all the experiments no significant changes in inulin clearance (Cin) and p-aminohipuric acid clearance (C PAH) were observed. Administration of steviol resulted in a statistically significant increase in the fractional sodium excretion (FeNa+), fractional potassium excretion (FeK+), urinary flow as percent of glomerular filtration rate (V/GFR) and glucose clearance (C G) when compared to controls, but these effects were absent with the dose of 0.5 mg.kg-1/h. The steviol clearance (C S) was higher than the Cin and lower than the C PAH at all the doses employed in this study. The data suggest that steviol is secreted by renal tubular epithelium, causing diuresis, natriuresis, kaliuresis and a fall in renal tubular reabsorption of glucose.
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Santos LCF, Belli NM, Augusto A, Masui DC, Leone FA, McNamara JC, Furriel RPM. Gill (Na+,K+)-ATPase in diadromous, freshwater palaemonid shrimps: Species-specific kinetic characteristics and α-subunit expression. Comp Biochem Physiol A Mol Integr Physiol 2007; 148:178-88. [PMID: 17521934 DOI: 10.1016/j.cbpa.2007.04.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 04/02/2007] [Accepted: 04/03/2007] [Indexed: 10/23/2022]
Abstract
To better comprehend physiological adaptation to dilute media and the molecular mechanisms underlying ammonia excretion in palaemonid shrimps, we characterized the (Na+,K+)-ATPase from Macrobrachium amazonicum gills, disclosing high- (K(0.5) = 4.2+/-0.2 micromol L(-1); V = 33.9+/-1.9 U mg(-1)) and low-affinity (K(0.5) = 0.144+/-0.010 mmol L(-1); V = 232.9+/-15.3 U mg(-1)) ATP hydrolyzing sites. Stimulation by Na+ (K(0.5) = 5.5+/-0.3 mmol L(-1); V = 275.1+/-15.1 U mg(-1)), Mg2+ (K(0.5) = 0.79+/-0.06 mmol L(-1); V = 261.9+/-18.3 U mg(-1)), K+ (K(M) = 0.88+/-0.04 mmol L(-1); V = 271.8+/-10.9 U mg(-1)) and NH4(+) (K(M) = 5.0+/-0.2 mmol L(-1); V = 385.9+/-15.8 U mg(-1)) obeys single saturation curves, activity being stimulated synergistically by NH4(+) and K+. There is a single K+ binding site, NH4(+) binding to a second, exclusive site, stimulating activity by 33%, modulating K+ affinity. (Na+,K+)-ATPase activity constitutes approximately 80% of total ATPase activity (K(Iouabain) = 147.5+/-8.9 micromol L(-1)); Na+-, K+-, Ca2+-, V- and F(o)F(1)-ATPases are also present. M. amazonicum microsomal fractions possess approximately 2-fold less (Na+,K+)-ATPase alpha-subunit than M. olfersi, consistent with a 2.6-fold lower specific activity. These differences in (Na+, K+)-ATPase stimulation by ATP and ions, and specific activities of other ATPases, suggest the presence of distinct biochemical adaptations to life in fresh water in these related species.
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Ferrigno CR, Ribeiro AA, Rahal SC, Orsi AM, Fioreto ET, Castro MF, Mchado MR, Singaretti F, Ricardo C, Augusto A, Canavese S, Marcos A, Ticona E, Fernandes M, Rita M, Singareti F. Double aortic arch in a dog (Canis familiaris): a case report. Anat Histol Embryol 2001; 30:379-81. [PMID: 11820409 DOI: 10.1046/j.1439-0264.2001.00344.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We herein report a case of a double aortic arch in a 10-week-old male dog of no defined race, which presented episodes of regurgitation at the time of weaning. This vascular malformation was characterized by the persistence of two aortic arches, right and left, of varying dimensions. The right aortic arch was observed to be larger. During post mortem examination the vessels of the animal were injected with coloured latex bi-centrifuged CIS 1-4 polisopreno which revealed the patency of the two aortic arches. Concomitantly, dilation of the cranial oesophagus causing constriction was observed, indicating megaesophagus. Apart from the constriction, the oesophagus presented normal morphometric parameters in relation to its dimensions.
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Augusto A, Kumar R, Calheiros JM, Matos E, Figueiredo E. Post-natal depression in an urban area of Portugal: comparison of childbearing women and matched controls. Psychol Med 1996; 26:135-141. [PMID: 8643752 DOI: 10.1017/s0033291700033778] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The point prevalence of depression measured on one occasion between 2 and 5 months after childbirth was estimated to be 13.1% in 352 mothers living in urban Portugal; the criterion was a score of 13 or more on a translated version of the Edinburgh Post-natal Depression Scale (EPDS). More detailed comparisons were made between a subgroup of 118 mothers and 118 matched controls who had not borne a child in the previous 2 years. Post-natal women were twice as likely as non-childbearing controls to meet the EPDS criterion for depression In comparison with controls, they were also more severely depressed as judged by their total scores on another questionnaire, the Zung Scale. Comparisons of individual symptom scores (Zung Scale) showed that childbearing women, as a whole, reported more somatic symptoms than controls, but when only those women judged to be depressed or dysphoric by the EPDS were compared, this difference disappeared. Stepwise logistic analyses of symptoms contributing to the categorization of a 'case' of post-natal versus non-post- natal depression did not reveal any very clear divergences in self-reported psychopathology. In childbearing women, two factors were found significantly to contribute to higher depression scores; women with more children and those from lower socio-economic groups were most at risk.
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Rocha V, Lebre R, Ferreira P, Cardoso A, Augusto A. [Superior mesenteric artery syndrome. Report of 2 clinical cases]. ACTA MEDICA PORT 1993; 6:47-50. [PMID: 8475788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The authors describe two cases of the superior mesenteric artery syndrome. The diagnosis was made by radiology and both were treated surgically. They emphasize the most relevant symptoms (epigastric pain and vomiting) and the characteristic radiological signs which permit the diagnosis (marked to-and-fro peristalsis in the duodenum with extrinsic compression of the third part and proximal dilatation ending abruptly). Although the conservative measures are sufficient in most cases, those presented in this paper, both needed surgery.
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