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1.
Am J Transplant ; 18(3): 574-579, 2018 03.
Artículo en Inglés | MEDLINE | ID: mdl-28805300

RESUMEN

Kidney Allocation System (KAS) was enacted in 2014 to improve graft utility, while facilitating transplantation of highly-sensitized patients and preserving pediatric access to high-quality kidneys. Central to this system is the Kidney Donor Profile Index (KDPI), a metric intended to predict transplant outcomes based on donor characteristics but derived using only adult donors. We posited that KAS had inadvertently altered the profile and quantity of kidneys made available to pediatric recipients. This question arose from our observation that most pediatric donors carry a KDPI over 35 and have therefore been rendered relatively inaccessible to pediatric recipients under KAS. Here we explore early trends in pediatric transplantation following KAS, including: (i) use of pediatric donors, (ii) use of Public Health System (PHS) high infectious risk donors, (iii) wait time, and (iv) living donor transplantation. We note some concerning preliminary changes following KAS implementation, including the allocation of fewer deceased donor pediatric kidneys to children and stagnation in pediatric wait times. Moreover, the poor predictive power of the KDPI for adult donors appears to be even worse when applied to pediatric donors. These early trends warrant further observation and consideration of changes in pediatric kidney allocation if they persist.


Asunto(s)
Trasplante de Riñón , Asignación de Recursos/normas , Medición de Riesgo/normas , Donantes de Tejidos , Obtención de Tejidos y Órganos/métodos , Receptores de Trasplantes , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Preescolar , Femenino , Estudios de Seguimiento , Humanos , Lactante , Recién Nacido , Masculino , Persona de Mediana Edad , Pronóstico , Asignación de Recursos/estadística & datos numéricos , Medición de Riesgo/estadística & datos numéricos , Factores de Riesgo , Adulto Joven
2.
Mol Hum Reprod ; 24(4): 185-202, 2018 04 01.
Artículo en Inglés | MEDLINE | ID: mdl-29528451

RESUMEN

STUDY QUESTION: Is Raman micro-spectroscopy a valid approach to assess the biochemical hallmarks of sperm regions (head, midpiece and tail) in four different species? SUMMARY ANSWER: Non-invasive Raman micro-spectroscopy provides spectral patterns enabling the biochemical characterization of the three sperm regions in the four species, revealing however high similarities for each region among species. WHAT IS KNOWN ALREADY: Raman micro-spectroscopy has been described as an innovative method to assess sperm features having the potential to be used as a non-invasive selection tool. However, except for nuclear DNA, the identification and assignment of spectral bands in Raman-profiles to the different sperm regions is scarce and controversial. STUDY DESIGN SIZE, DURATION: Raman spectra from head, midpiece and tail of four different species were obtained. Sperm samples were collected and smeared on microscope slides. Air dried samples were subjected to Raman analysis using previously standardized procedures. PARTICIPANTS/MATERIALS, SETTING, METHODS: Sperm samples from (i) two donors attending the infertility clinic at the Centre of Reproductive Medicine and Andrology; (ii) two C57BL/6 -TgN (ACTbEGFP) 1Osb adult mice; (iii) two adult Cynomolgus monkeys (Macaca fascicularis) and (iv) two sea urchins (Arbacia punctulata) were used to characterize and compare their spectral profiles. Differences and similarities were confirmed by principal component analysis (PCA). MAIN RESULTS AND THE ROLE OF CHANCE: Several novel region-specific peaks were identified. The three regions could be differentiated by distinctive Raman patterns irrespective of the species. However, regardless of the specie, their main spectral pattern remains mostly unchanged. These results were corroborated by the PCA analysis and suggest that the basic constituents of spermatozoa are biochemically similar among species. LIMITATIONS REASONS FOR CAUTION: Further research should be performed in live sperm to validate the detected spectral bands and their use as markers of distinctive regions. WIDER IMPLICATIONS OF THE FINDINGS: Raman peaks that have never been described in the sperm cell were detected. Particularly important are those that are unique to the midpiece as they might be a reference to the identification of sperm mitochondria, whose function is highly correlated with that of sperm. In the future, Raman micro-spectroscopy has the potential to be applied in assessment of male fertility. LARGE SCALE DATA: N/A. STUDY FUNDING AND COMPETING INTEREST(S): This work was supported by BMBF project 'Sperm Ident' (FKZ:13N13024) and the DAAD-CRUP bilateral exchange program (AI A06/16-57213087). S.A. is a recipient of a fellowship from the Portuguese foundation for science and technology (FCT-SFRH/BPD/110160/2015) and R.DC. is a recipient of a DAAD PhD stipend (91590556). There is no competing interest.


Asunto(s)
Espectrometría Raman/métodos , Análisis Espectral/métodos , Animales , ADN/análisis , Masculino , Ratones , Ratones Endogámicos C57BL , Análisis de Componente Principal
3.
Reproduction ; 155(1): R13-R37, 2018 01.
Artículo en Inglés | MEDLINE | ID: mdl-28993453

RESUMEN

Diabetes mellitus has been increasing at alarming rates in recent years, thus jeopardizing human health worldwide. Several antidiabetic drugs have been introduced in the market to manage glycemic levels, and proven effective in avoiding, minimizing or preventing the appearance or development of diabetes mellitus-related complications. However, and despite the established association between such pathology and male reproductive dysfunction, the influence of these therapeutic interventions on such topics have been scarcely explored. Importantly, this pathology may contribute toward the global decline in male fertility, giving the increasing preponderance of diabetes mellitus in young men at their reproductive age. Therefore, it is mandatory that the reproductive health of diabetic individuals is maintained during the antidiabetic treatment. With this in mind, we have gathered the available information and made a critical analysis regarding the effects of several antidiabetic drugs on male reproductive function. Unlike insulin, which has a clear and fundamental role on male reproductive function, the other antidiabetic therapies' effects at this level seem incoherent. In fact, studies are highly controversial possibly due to the different experimental study approaches, which, in our opinion, suggests caution when it comes to prescribing such drugs to young diabetic patients. Overall, much is still to be determined and further studies are needed to clarify the safety of these antidiabetic strategies on male reproductive system. Aspects such as the effects of insulin levels variations, consequent of insulin therapy, as well as what will be the impact of the side effect hypoglycemia, common to several therapeutic strategies discussed, on the male reproductive system are still to be addressed.


Asunto(s)
Diabetes Mellitus/tratamiento farmacológico , Hipoglucemiantes/efectos adversos , Infertilidad Masculina/inducido químicamente , Infertilidad Masculina/epidemiología , Humanos , Masculino , Pronóstico
4.
Reproduction ; 150(1): 77-84, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-25926692

RESUMEN

Diabetes mellitus (DM) represents one of the greatest concerns to global health and it is associated with diverse clinical complications, including reproductive dysfunction. Given the multifactorial nature of DM, the mechanisms that underlie reproductive dysfunction remain unclear. Considering that hyperglycemia has been described as a major effector of the disease pathophysiology, we used an in vitro approach to address the isolated effect of high glucose conditions on human sperm function, thus avoiding other in vivo confounding players. We performed a complete and integrated analysis by measuring a variety of important indicators of spermatozoa functionality (such as motility, viability, capacitation status, acrosomal integrity, mitochondrial superoxide production and membrane potential) in human sperm samples after incubation with d- and l-glucose (5, 25, or 50 mM) for 24 and 48 h. No direct effects promoted by 25 or 50 mM d-glucose were found for any of the parameters assessed (P>0.05), except for the acrosome reaction, which was potentiated after 48 h of exposure to 50 mM d-glucose (P<0.05). Interestingly, non-metabolizable l-glucose drastically increased superoxide production (P<0.05) and suppressed sperm motility (P<0.05) and capacitation (P<0.05) after 24 h of treatment, whereas mitochondrial membrane potential (P<0.05), acrosomal integrity (P<0.01) and viability (P<0.05) were later decreased. The overall results suggest that high glucose levels per se do not influence human sperm function in vitro, which stresses the importance of other factors involved in DM pathology. Nevertheless, the absence of metabolizable glucose contributes to a severe impairment of sperm function and thus compromises male fertility.


Asunto(s)
Reacción Acrosómica/efectos de los fármacos , Glucosa/administración & dosificación , Capacitación Espermática/efectos de los fármacos , Motilidad Espermática/efectos de los fármacos , Espermatozoides/efectos de los fármacos , Acrosoma/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Humanos , Masculino , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Mitocondrias/efectos de los fármacos , Mitocondrias/metabolismo , Espermatozoides/metabolismo , Superóxidos/metabolismo
5.
Am J Transplant ; 14(1): 21-6, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24354869

RESUMEN

In the setting of organ scarcity, the ethics of multi-organ transplantation (MOT) deserve new examination. MOT offers substantial benefits to certain recipients, including avoiding serial surgeries. However, MOT candidates in the United States commonly receive priority for their nonprimary organ over many individuals who need that organ, which may undermine equity. The absence of standard criteria for MOT eligibility also enables large and unfair regional variation in MOT, such as simultaneous liver-kidney transplantation. Unfortunately, MOT may also undermine utility (optimal patient and graft survival) in circumstances where providing multiple organs to one person fails to achieve the greater collective benefit attained by providing transplants to multiple people. Policy reforms should include the adoption of minimal clinical criteria for MOT candidacy with the attendant goal of decreasing regional variation in MOT. In the future, these minimal criteria can be revised to accommodate new research about which patients derive the most benefit from MOT. Incentives to perform MOT should also be reduced, such as by including MOT outcomes in center-specific reports. These reforms run the risk that the transplant community could be perceived as abandoning MOT candidates, but offer an opportunity to align transplant practice and ethical principles.


Asunto(s)
Trasplante de Órganos/ética , Selección de Paciente , Asignación de Recursos , Obtención de Tejidos y Órganos/ética , Adulto , Niño , Trasplante de Corazón , Humanos , Trasplante de Riñón , Trasplante de Hígado , Trasplante de Páncreas , Selección de Paciente/ética , Calidad de Vida , Resultado del Tratamiento , Listas de Espera
6.
Horm Metab Res ; 46(7): 484-9, 2014 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-24710698

RESUMEN

This study investigated how proteins of the insulin signaling cascade could modulate insulin resistance after dexamethasone (Dexa) treatment and aerobic training. Rats were distributed into 4 groups: sedentary control (SC), sedentary+Dexa (SD), trained control (TC), and trained+Dexa (TD), and underwent aerobic training for 70 days or remained sedentary. Dexa was administered during the last 10 days (1 mg · kg(-1) per day i. p.). After 70 days, an intraperitoneal glucose tolerance test (ipGTT) was performed. Protein levels of IRS-1, AKT, and PKC-α in the tibialis anterior (TA) muscle were identified using Western blots. Dexa treatment increased blood glucose and the area under the curve (AUC) of ipGTT. Training attenuated the hyperglycemia and the AUC induced by Dexa. Dexa reduced IRS-1 (- 16%) and AKT (- 43%) protein level with no changes in PKC-α levels. Moreover, these effects on IRS-1 and AKT protein level were prevented in trained animals. These results show for the first time that aerobic exercise prevented reductions of IRS-1 and AKT level induced by Dexa in the TA muscle, suggesting that aerobic exercise is a good strategy to prevent Dexa-induced peripheral insulin resistance.


Asunto(s)
Dexametasona/farmacología , Resistencia a la Insulina , Condicionamiento Físico Animal , Animales , Glucemia/metabolismo , Western Blotting , Peso Corporal/efectos de los fármacos , Prueba de Tolerancia a la Glucosa , Proteínas Sustrato del Receptor de Insulina/metabolismo , Músculos/efectos de los fármacos , Músculos/metabolismo , Tamaño de los Órganos/efectos de los fármacos , Fosforilación/efectos de los fármacos , Ratas , Ratas Wistar
7.
Am J Transplant ; 13(7): 1769-81, 2013 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-23731389

RESUMEN

Preemptive kidney transplantation is the optimal treatment for pediatric end stage renal disease patients to avoid increased morbidity and mortality associated with dialysis. It is unknown how race/ethnicity and poverty influence preemptive transplant access in pediatric. We examined the incidence of living donor or deceased donor preemptive transplantation among all black, white, and Hispanic children (<18 years) in the United States Renal Data System from 2000 to 2009. Adjusted risk ratios for preemptive transplant were calculated using multivariable-adjusted models and examined across health insurance and neighborhood poverty levels. Among 8,053 patients, 1117 (13.9%) received a preemptive transplant (66.9% from LD, 33.1% from DD). In multivariable analyses, there were significant racial/ethnic disparities in access to LD preemptive transplant where blacks were 66% (RR = 0.34; 95% CI: 0.28-0.43) and Hispanics 52% (RR = 0.48; 95% CI: 0.35-0.67) less likely to receive a LD preemptive transplant versus whites. Blacks were 22% less likely to receive a DD preemptive transplant versus whites (RR = 0.78, 95% CI: 0.57-1.05), although results were not statistically significant. Future efforts to promote equity in preemptive transplant should address the critical issues of improving access to pre-ESRD nephrology care and overcoming barriers in living donation, including obstacles partially driven by poverty.


Asunto(s)
Etnicidad , Accesibilidad a los Servicios de Salud , Disparidades en Atención de Salud/etnología , Fallo Renal Crónico/etnología , Trasplante de Riñón/etnología , Grupos Raciales , Adolescente , Distribución por Edad , Niño , Preescolar , Femenino , Estudios de Seguimiento , Humanos , Incidencia , Lactante , Recién Nacido , Fallo Renal Crónico/cirugía , Donadores Vivos , Masculino , Estudios Retrospectivos , Factores de Riesgo , Distribución por Sexo , Factores Socioeconómicos , Estados Unidos/epidemiología , Listas de Espera
9.
Braz J Med Biol Res ; 56: e12338, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36946839

RESUMEN

Chronic nonspecific low back pain (CNLBP) is the most common musculoskeletal condition, which can be influenced by nociceptive, psychosocial, cognitive, and affective aspects, causing vulnerabilities and impairing the individual's ability to manage pain. The association of continuous shortwave diathermy (CSWD) with Pilates-based exercises may contribute to reduce pain, depression, and anxiety in patients with CNLBP. A single-blind randomized clinical trial was performed in which 36 patients with CNLBP were divided into a control group that received placebo CSWD and an intervention group that received active CSWD. Both groups received 12 sessions of Pilates-based exercises. Pain, depression, and anxiety variables were evaluated using the McGill questionnaire, the Beck Depression Inventory, and the Visual Analog Anxiety Scale. Assessments were performed at baseline, after three and six weeks of treatment, and at the three-month follow-up. The Shapiro-Wilk test, Student's t-test, Mann-Whitney U test, chi-squared test, and repeated measures ANOVA, with α=0.05, were used to compare the outcomes, and indicated that active CSWD did not present additional improvement in the assessed variables in CNLBP patients compared to the placebo group. Both groups improved pain and depression at follow-up and reduced anxiety only during Pilates-based exercises. Therefore, only Pilates-based exercises seemed sufficient to manage patients with CNLBP.


Asunto(s)
Dolor Crónico , Diatermia , Técnicas de Ejercicio con Movimientos , Dolor de la Región Lumbar , Humanos , Dolor de la Región Lumbar/terapia , Manejo del Dolor , Método Simple Ciego , Depresión/terapia , Dimensión del Dolor , Ansiedad/terapia , Dolor Crónico/terapia , Dolor Crónico/psicología , Resultado del Tratamiento , Terapia por Ejercicio
10.
Brain Res ; 1804: 148262, 2023 04 01.
Artículo en Inglés | MEDLINE | ID: mdl-36706858

RESUMEN

A vascularized composite tissue allotransplantation (VCA) was performed at the Children's Hospital of Philadelphia (CHOP), on an 8-year-old patient in 2015, six years after bilateral hand and foot amputation. Hand VCA resulted in reafferentation of the medial, ulnar, and radial nerves serving hand somatosensation and motor function. We used magnetoencephalography (MEG) to assess somatosensory cortical plasticity following the post-transplantation recovery of the peripheral sensory nerves of the hands. Our 2-year postoperative MEG showed that somatosensory lip representations, initially observed at "hand areas", reverted to canonical, orthotopic lip locations with recovery of post-transplant hand function. Here, we continue the assessment of motor and somatosensory responses up to 6-years post-transplant. Magnetoencephalographic somatosensory responses were recorded eight times over a six-year period following hand transplantation, using a 275-channel MEG system. Somatosensory tactile stimuli were presented to the right lower lip (all 8 visits) as well as right and left index fingers (visits 3-8) and fifth digits (visits 4-8). In addition, left and right-hand motor responses were also recorded for left index finger and right thumb (visit 8 only).During the acute recovery phase (visits 3 and 4), somatosensory responses of the digits were observed to be significantly larger and more phasic (i.e., smoother) than controls. Subsequent measures showed that digit responses maintain this atypical response profile (evoked-response magnitudes typically exceed 1 picoTesla). Orthotopic somatosensory localization of the lip, D2, and D5 was preserved. Motor beta-band desynchrony was age-typical in localization and response magnitude; however, the motor gamma-band response was significantly larger than that observed in a reference population.These novel findings show that the restoration of somatosensory input of the hands resulted in persistent and atypically large cortical responses to digit stimulation, which remain atypically large at 6 years post-transplant; there is no known perceptual correlate, and no reports of phantom pain. Normal somatosensory organization of the lip, D2, and D5 representation remain stable following post-recovery reorganization of the lip's somatosensory response.


Asunto(s)
Trasplante de Mano , Plasticidad Neuronal , Humanos , Niño , Plasticidad Neuronal/fisiología , Corteza Somatosensorial/fisiología , Mano/fisiología , Dedos/fisiología , Magnetoencefalografía , Mapeo Encefálico
11.
Am J Transplant ; 12(4): 1017-23, 2012 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-22226386

RESUMEN

Education services for Stage-IV chronic kidney disease patients were added in 2010 as a Part B covered benefit under the Medicare Improvements for Patients and Providers Act. Desired outcomes include early pursuit of kidney transplantation by more patients and reduction of racial disparities in access to transplantation. During 2005-2007, a United States Renal Data System (USRDS) special study surveyed 1123 patients in a national cohort who had recently started dialysis, identified themselves as black or white, and were reported by their physician as potentially eligible transplant candidates. Patients were asked if kidney transplantation had been discussed with them before they initiated renal replacement therapy, and survey responses were linked with subsequent wait listing and transplant events in USRDS registry files. Kaplan-Meier analyses showed a significant association between early transplant awareness and subsequent wait listing. Adjusted Cox models showed a significant race/early transplant awareness interaction, however, with the impact of early awareness on wait listing much stronger for whites. Ongoing support and education about kidney transplantation for patients after dialysis start could help to build on early education and foster greater quality improvement in patient outcomes.


Asunto(s)
Etnicidad , Conocimientos, Actitudes y Práctica en Salud , Accesibilidad a los Servicios de Salud , Fallo Renal Crónico/cirugía , Trasplante de Riñón , Educación del Paciente como Asunto , Adulto , Población Negra , Femenino , Humanos , Masculino , Persona de Mediana Edad , Sistema de Registros , Diálisis Renal , Terapia de Reemplazo Renal , Listas de Espera , Población Blanca
12.
Am J Transplant ; 12(2): 369-78, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22226039

RESUMEN

Racial disparities persist in access to renal transplantation in the United States, but the degree to which patient and neighborhood socioeconomic status (SES) impacts racial disparities in deceased donor renal transplantation access has not been examined in the pediatric and adolescent end-stage renal disease (ESRD) population. We examined the interplay of race and SES in a population-based cohort of all incident pediatric ESRD patients <21 years from the United States Renal Data System from 2000 to 2008, followed through September 2009. Of 8452 patients included, 30.8% were black, 27.6% white-Hispanic, 44.3% female and 28.0% lived in poor neighborhoods. A total of 63.4% of the study population was placed on the waiting list and 32.5% received a deceased donor transplant. Racial disparities persisted in transplant even after adjustment for SES, where minorities were less likely to receive a transplant compared to whites, and this disparity was more pronounced among patients 18-20 years. Disparities in access to the waiting list were mitigated in Hispanic patients with private health insurance. Our study suggests that racial disparities in transplant access worsen as pediatric patients transition into young adulthood, and that SES does not explain all of the racial differences in access to kidney transplantation.


Asunto(s)
Accesibilidad a los Servicios de Salud/estadística & datos numéricos , Disparidades en el Estado de Salud , Disparidades en Atención de Salud , Fallo Renal Crónico/cirugía , Trasplante de Riñón/etnología , Grupos Raciales , Clase Social , Adolescente , Niño , Preescolar , Femenino , Humanos , Lactante , Fallo Renal Crónico/etnología , Masculino , Estudios Retrospectivos , Factores Socioeconómicos , Estados Unidos/epidemiología , Listas de Espera , Adulto Joven
13.
Am J Transplant ; 12(2): 358-68, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22233181

RESUMEN

Racial disparities in access to renal transplantation exist, but the effects of race and socioeconomic status (SES) on early steps of renal transplantation have not been well explored. Adult patients referred for renal transplant evaluation at a single transplant center in the Southeastern United States from 2005 to 2007, followed through May 2010, were examined. Demographic and clinical data were obtained from patient's medical records and then linked with United States Renal Data System and American Community Survey Census data. Cox models examined the effect of race on referral, evaluation, waitlisting and organ receipt. Of 2291 patients, 64.9% were black, the mean age was 49.4 years and 33.6% lived in poor neighborhoods. Racial disparities were observed in access to referral, transplant evaluation, waitlisting and organ receipt. SES explained almost one-third of the lower rate of transplant among black versus white patients, but even after adjustment for demographic, clinical and SES factors, blacks had a 59% lower rate of transplant than whites (hazard ratio = 0.41; 95% confidence interval: 0.28-0.58). Results suggest that improving access to healthcare may reduce some, but not all, of the racial disparities in access to kidney transplantation.


Asunto(s)
Disparidades en el Estado de Salud , Disparidades en Atención de Salud/estadística & datos numéricos , Fallo Renal Crónico/cirugía , Trasplante de Riñón/etnología , Pobreza , Grupos Raciales , Listas de Espera , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Fallo Renal Crónico/etnología , Trasplante de Riñón/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores Socioeconómicos , Sudeste de Estados Unidos/epidemiología , Adulto Joven
14.
Genet Mol Res ; 11(3): 1861-80, 2012 Jul 19.
Artículo en Inglés | MEDLINE | ID: mdl-22869542

RESUMEN

We identified the commercial releases of genetically modified organisms (GMOs) in Brazil, their characteristics, the types of genetic transformation used, and the companies responsible for the development of these GMOs, classifying them into two categories: private companies, subdivided into multinational and national, and public institutions. The data came from the data bank of the national registration of cultivars and the service of national protection of cultivars of the Ministry of Agriculture, Fishing and Supply (MAPA). This survey was carried out from 1998 to February 12, 2011. Until this date, 27 GMOs had been approved, including five for soybean, 15 for maize and seven for cotton cultivars. These GMOs have been used for the development of 766 cultivars, of which, 305 are soybean, 445 are maize, and 13 are cotton cultivars. The Monsato Company controls 73.2% of the transgenic cultivars certified by the MAPA; a partnership between Dow AgroSciences and DuPont accounts for 21.4%, and Syngenta controls 4.96%. Seed supply by these companies is almost a monopoly supported by law, giving no choice for producers and leading to the fast replacement of conventional cultivars by transgenic cultivars, which are expensive and exclude small producers from the market, since seeds cannot be kept for later use. This situation concentrates production in the hands of a few large national agribusiness entrepreneurs.


Asunto(s)
Agricultura/economía , Agricultura/métodos , Comercio/economía , Plantas Modificadas Genéticamente/crecimiento & desarrollo , Semillas/crecimiento & desarrollo , Semillas/genética , Academias e Institutos/estadística & datos numéricos , Agricultura/legislación & jurisprudencia , Agricultura/estadística & datos numéricos , Brasil , Comercio/legislación & jurisprudencia , Comercio/estadística & datos numéricos , Seguridad de Productos para el Consumidor/legislación & jurisprudencia , Legislación como Asunto/estadística & datos numéricos , Transformación Genética
15.
Genet Mol Res ; 10(2): 792-809, 2011 May 03.
Artículo en Inglés | MEDLINE | ID: mdl-21563073

RESUMEN

During the last 20 years, the national production of grains has increased 156.1%; productivity increased 93.8% and there has been an increase of 29.1% in cultivated area. Currently, agribusiness is responsible for 40% of Brazilian exports. Nevertheless, there is little quantitative information on the main plant species of economic interest that have been registered and protected in the Agriculture, Fisheries and Food Supply Ministry (MAPA) by public and private companies, as well as by public-private partnerships. Consequently, we investigated the registry and protection of 27 species of economic interest, including the 15 that are the basis of the Brazilian diet, based on the information available on the site CultivarWeb, of MAPA, for the period from 1998 to August 30, 2010. We also examined the legislation that regulates registration and protection procedures and its implications for plant breeding and plant product development. It was found that the private sector controls 73.1% of the registrations and 53.56% of the protections, while 10.73% of the protections were of material developed overseas. Public-private partnerships contributed little to the development of new cultivars, with 0.5% of the registries and 3.61% of the protections. We conclude that plant protection directed private investment to development of wheat and rice varieties, with the greatest public investments directed to corn and sorghum. After the Cultivar Protection Law was implemented, there was restriction of access to germplasm banks, which could inhibit advances in Brazilian plant breeding programs, indicating a need for revision of this legal barrier.


Asunto(s)
Cruzamiento/economía , Cruzamiento/legislación & jurisprudencia , Productos Agrícolas/economía , Abastecimiento de Alimentos/economía , Abastecimiento de Alimentos/legislación & jurisprudencia , Agricultura , Brasil , Bases de Datos Factuales , Industrias/economía , Industrias/legislación & jurisprudencia , Oryza , Sector Privado , Asociación entre el Sector Público-Privado , Sorghum , Triticum , Zea mays
16.
Mater Sci Eng C Mater Biol Appl ; 131: 112453, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34857256

RESUMEN

In this work, ß-TCP (ß-tricalcium phosphate) bioresorbable scaffolds were prepared by the gel casting method. Then, they were impregnated with a 45S5 bioglass sol gel solution to improve biocompatibility and promote bioactivity and antimicrobial activity. The ß-TCP scaffolds had an apparent porosity of 72%, and after the incorporation of the bioglass, this porosity was maintained. The elements of the bioglass were incorporated into ß-TCP matrix and there was a partial transformation from the ß-TCP phase to the α-TCP (α-tricalcium phosphate) phase, besides the formation of bioactive calcium and sodium­calcium silicates. The scaffolds ß-TCP with 45S5 bioglass incorporated (ß-TCP/45S5) did not show a reduction in their values of mechanical strength and Weibull modulus, despite the partial transformation to the α-TCP phase. Bioactivity, cell viability, and antimicrobial activity improved significantly for the ß-TCP/45S5 scaffold comparing to the scaffold without the bioglass. The mineralization of carbonated hydroxyapatite was verified in Simulated Body Fluid (SBF). The cell viability, evaluated by the reduction of 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide - MTT in MG63 cells, increased by 178%, and ß-TCP/45S5 scaffold also enhanced cell activity and osteoblast differentiation observed by means of total protein contend and alkaline phosphatase activity, respectively. The formation of growth inhibition zones was also observed in the disk diffusion assay for three tested microorganisms: Staphylococcus aureus, Escherichia coli and Candida albicans. To conclude, the vacuum impregnation method in 45S5 bioglass sol gel solution was effective in penetrating all the interconnected macroporosity of the scaffolds and covering the surface of the struts, which improved their biological properties in vitro, bioactivity and antibacterial activity, without reducing mechanical strength and porosity values. Thus, the ß-TCP/45S5 scaffolds are shown as potential candidates for use in tissue engineering, mainly in bone tissue regeneration and recovery.


Asunto(s)
Antiinfecciosos , Andamios del Tejido , Antiinfecciosos/farmacología , Fosfatos de Calcio , Cerámica/farmacología , Vidrio , Porosidad , Ingeniería de Tejidos
17.
Int J Tuberc Lung Dis ; 23(11): 1191-1197, 2019 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-31718755

RESUMEN

SETTING: Seventeen health care facilities that report to the national tuberculosis (TB) programme in Timor-Leste. Participants were TB patients.OBJECTIVE: To determine the proportion of TB patients who experienced catastrophic costs due to their TB diagnosis and care, and the magnitude and composition of these costs.DESIGN: This was a cross-sectional health facility-based survey, conducted in 17 DOTS centres between October 2016 and March 2017. TB patients were interviewed by trained nurses using a standardised questionnaire.RESULTS: Among the 457 TB patients who participated (response rate 96.6%), the median age was 32 years; 39.2% were from the capital, Dili. The patient was the main income earner in 26.3% of households. Annual individual and household incomes before and after TB diagnosis decreased by respectively 30.4% and 31.1%. Using a cut-off of 20% of annual household income, 83.0% of patients experienced catastrophic costs related to their TB diagnosis and care. Income loss and nutritional supplementation accounted for respectively 40.7% and 37.9% of these costs.CONCLUSION: Four of five TB patients in Timor-Leste experienced catastrophic costs related to TB diagnosis and care. Financial and social protection to mitigate against these costs are urgently needed, in addition to universal health coverage.


Asunto(s)
Costo de Enfermedad , Costos de la Atención en Salud/estadística & datos numéricos , Tuberculosis Pulmonar/economía , Adolescente , Adulto , Estudios Transversales , Femenino , Humanos , Renta , Masculino , Persona de Mediana Edad , Apoyo Nutricional/economía , Timor Oriental , Adulto Joven
18.
Curr Med Chem ; 26(22): 4191-4222, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30381064

RESUMEN

The alarming increase in the number of diabetic patients worldwide raises concerns regarding the impact of the disease on global health, not to mention on social and economic aspects. Furthermore, the association of this complex metabolic disorder with male reproductive impairment is worrying, mainly due to the increasing chances that young individuals, at the apex of their reproductive window, could be affected by the disease, further contributing to the disturbing decline in male fertility worldwide. The cornerstone of diabetes management is glycemic control, proven to be effective in avoiding, minimizing or preventing the appearance or development of disease-related complications. Nonetheless, the possible impact of these therapeutic interventions on male reproductive function is essentially unexplored. To address this issue, we have made a critical assessment of the literature on the effects of several antidiabetic drugs on male reproductive function. While the crucial role of insulin is clear, as shown by the recovery of reproductive impairments in insulin-deficient individuals after treatment, the same clearly does not apply to other antidiabetic strategies. In fact, there is an abundance of controversial reports, possibly related to the various study designs, experimental models and compounds used, which include biguanides, sulfonylureas, meglitinides, thiazolidinediones/glitazones, bile acid sequestrants, amylin mimetics, as well as sodiumglucose co-transporter 2 (SGLT2) inhibitors, glucagon-like peptide 1 (GLP1), α-glucosidase inhibitors and dipeptidyl peptidase 4 (DPP4) inhibitors. These aspects constitute the focus of the current review.


Asunto(s)
Diabetes Mellitus Tipo 1/tratamiento farmacológico , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Genitales Masculinos/efectos de los fármacos , Hipoglucemiantes/farmacología , Diabetes Mellitus Tipo 1/metabolismo , Diabetes Mellitus Tipo 2/metabolismo , Genitales Masculinos/metabolismo , Humanos , Masculino
19.
Braz. j. med. biol. res ; 56: e12338, 2023. tab, graf
Artículo en Inglés | LILACS-Express | LILACS | ID: biblio-1420752

RESUMEN

Chronic nonspecific low back pain (CNLBP) is the most common musculoskeletal condition, which can be influenced by nociceptive, psychosocial, cognitive, and affective aspects, causing vulnerabilities and impairing the individual's ability to manage pain. The association of continuous shortwave diathermy (CSWD) with Pilates-based exercises may contribute to reduce pain, depression, and anxiety in patients with CNLBP. A single-blind randomized clinical trial was performed in which 36 patients with CNLBP were divided into a control group that received placebo CSWD and an intervention group that received active CSWD. Both groups received 12 sessions of Pilates-based exercises. Pain, depression, and anxiety variables were evaluated using the McGill questionnaire, the Beck Depression Inventory, and the Visual Analog Anxiety Scale. Assessments were performed at baseline, after three and six weeks of treatment, and at the three-month follow-up. The Shapiro-Wilk test, Student's t-test, Mann-Whitney U test, chi-squared test, and repeated measures ANOVA, with α=0.05, were used to compare the outcomes, and indicated that active CSWD did not present additional improvement in the assessed variables in CNLBP patients compared to the placebo group. Both groups improved pain and depression at follow-up and reduced anxiety only during Pilates-based exercises. Therefore, only Pilates-based exercises seemed sufficient to manage patients with CNLBP.

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