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1.
Eur J Neurol ; : e16504, 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39367633

RESUMEN

BACKGROUND AND PURPOSE: We aimed to report the characteristics of cerebral venous thrombosis (CVT) in elderly people (aged ≥65 years). METHODS: This multicenter retrospective cohort included elderly patients hospitalized for a first CVT in nine Paris-Ile-de-France hospitals between 2011 and 2021. The estimated incidence was compared to CVT recorded by the French health insurance data system. Lariboisière Hospital's CVT registry allowed comparisons of our elderly cohort with individuals younger than 65 years. RESULTS: One hundred fourteen patients were included in this study (mean age = 74.2 years, range = 65-93, 61% female). The CVT annual incidence in Ile-de-France was 5.9-7.1 per million elderly individuals versus 8.5 per million nationwide. Headaches and focal deficits were the most common initial clinical features (50% and 51%, respectively), followed by seizures and confusion (40% and 27%). Treatment included anticoagulation (93%) and, rarely, endovascular procedure (2%) or craniectomy (1%). Compared with adult patients aged <65 years (younger adults), elderly patients presented fewer headaches (50% vs. 96%, p < 0.01) and intracranial hypertension (7% vs. 22%, p < 0.01) but more seizures and focal deficits (40% vs. 27% and 51% vs. 38%, respectively, p < 0.01). Underlying cancer, hemopathy, and locoregional infections were more frequent in elderly patients than among younger adults (p < 0.01). The prognosis of patients from our elderly cohort was poorer than that of younger adults; 8% died in the acute phase, and 73% had a favorable outcome at 1 year (vs. 1.7% and 87%, respectively, p < 0.01). CONCLUSIONS: CVT in elderly patients has a specific clinical presentation, epidemiology, and risk factors such as cancer or hemopathy, justifying specialized management.

2.
Nutrients ; 16(17)2024 Sep 02.
Artículo en Inglés | MEDLINE | ID: mdl-39275246

RESUMEN

BACKGROUND: Current treatment for chronic kidney disease (CKD) focuses on improving manifestations and delaying progression. Nutritional approaches play a crucial role in CKD management, and various supplements have become available. Ketoanalogues of amino acids (KAs), calcium citrate, and inulin have been proposed as suitable supplements, yet their widespread use has been limited due to insufficient evidence. This study aimed to generate general guidance statements on the appropriateness of these supplements through a RAND/UCLA consensus process. METHODS: A RAND/UCLA consensus panel was convened to evaluate the appropriateness of these supplements in different clinical scenarios. In this study, we present a subgroup analysis focusing on a panel of eleven clinical nephrologists from among the experts. RESULTS: Supplementation of low-protein diets (LPDs) and very low-protein diets (VLPDs) with KA was considered appropriate to reduce manifestations and delay CKD outcomes, supplementation with calcium citrate is considered appropriate to reduce CKD manifestations, and supplementation with inulin is considered appropriate to delay CKD outcomes and manage comorbidities. CONCLUSIONS: Based on a combination of clinical experience and scientific evidence, the panel reached a consensus that KA supplementation of LPD and VLPD, calcium citrate, and inulin are appropriate in patients with CKD across various scenarios.


Asunto(s)
Aminoácidos , Citrato de Calcio , Consenso , Dieta con Restricción de Proteínas , Suplementos Dietéticos , Inulina , Insuficiencia Renal Crónica , Insuficiencia Renal Crónica/dietoterapia , Humanos , Inulina/administración & dosificación , Aminoácidos/administración & dosificación , Dieta con Restricción de Proteínas/métodos , Citrato de Calcio/administración & dosificación , Citrato de Calcio/uso terapéutico
3.
Sci Rep ; 14(1): 21626, 2024 09 16.
Artículo en Inglés | MEDLINE | ID: mdl-39285254

RESUMEN

This study investigated the influence of social media on patients regarding aesthetic dental treatments according to sex, type of treatment, and time since their last treatment. A cross-sectional study was conducted using a web-based survey. Participants were students over 18 years of age who were social media users and had undergone aesthetic dental treatment. 504 responses were included. Data evaluation was made using Pearson chi-square test. The level of significance was set at p < .05. 29.37% of the respondents indicated that social media influenced their decision to have their aesthetic treatment. Regarding the influence of social media, no differences were observed between males and females, nor by type of aesthetic treatment. Participants who had undergone an aesthetic dental treatment within the last year were more influenced by social media than those who had undergone it more than two years ago. Posts from dental clinics or dentists were the type of content that most influenced participants. Social media can influence some patients' decision to undergo aesthetic dental treatment, thus dental practices and dentists should consider the increasing importance of social media in their daily practice.


Asunto(s)
Toma de Decisiones , Estética Dental , Medios de Comunicación Sociales , Humanos , Femenino , Masculino , Estudios Transversales , Encuestas y Cuestionarios , Adulto , Adulto Joven , Adolescente , Estudiantes de Odontología/psicología
4.
J Am Heart Assoc ; 13(19): e035174, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39291493

RESUMEN

BACKGROUND: G6PD (glucose-6-phosphate-dehydrogenase) is a key enzyme in the glycolytic pathway and has been implicated in the pathogenesis of cancer and pulmonary hypertension-associated vascular remodeling. Here, we investigated the role of an X-linked G6pd mutation (N126D polymorphism), which is known to increase the risk of cardiovascular disease in individuals from sub-Saharan Africa and many others with African ancestry, in the pathogenesis of pulmonary hypertension induced by a vascular endothelial cell growth factor receptor blocker used for treating cancer. METHODS AND RESULTS: CRISPR-Cas9 genome editing was used to generate the G6pd variant (N126D; G6pdN126D) in rats. A single dose of the vascular endothelial cell growth factor receptor blocker sugen-5416 (SU; 20 mg/kg in DMSO), which is currently in a Phase 2/3 clinical trial for cancer treatment, was subcutaneously injected into G6pdN126D rats and their wild-type littermates. After 8 weeks of normoxic conditions, right ventricular pressure and hypertrophy, pulmonary artery remodeling, the metabolic profile, and cytokine expression were assessed. Right ventricular pressure and pulmonary arterial wall thickness were increased in G6PDN126D+SU/normoxic rats. Simultaneously, levels of oxidized glutathione, inositol triphosphate, and intracellular Ca2+ were increased in the lungs of G6PDN126D+SU/normoxic rats, whereas nitric oxide was decreased. Also increased in G6PDN126D+SU/normoxic rats were pulmonary levels of plasminogen activator inhibitor-1, thrombin-antithrombin complex, and expression of proinflammatory cytokines CCL3 (chemokine [C-C motif] ligand), CCL5, and CCL7. CONCLUSIONS: Our results suggest G6PDN126D increases inositol triphosphate-Ca2+ signaling, inflammation, thrombosis, and hypertrophic pulmonary artery remodeling in SU-treated rats. This suggests an increased risk of vascular endothelial cell growth factor receptor blocker-induced pulmonary hypertension in those carrying this G6PD variant.


Asunto(s)
Glucosafosfato Deshidrogenasa , Receptores de Factores de Crecimiento Endotelial Vascular , Animales , Glucosafosfato Deshidrogenasa/genética , Glucosafosfato Deshidrogenasa/metabolismo , Receptores de Factores de Crecimiento Endotelial Vascular/genética , Ratas , Masculino , Arteria Pulmonar/efectos de los fármacos , Arteria Pulmonar/metabolismo , Arteria Pulmonar/patología , Arteria Pulmonar/fisiopatología , Hipertensión Pulmonar/inducido químicamente , Hipertensión Pulmonar/metabolismo , Hipertensión Pulmonar/genética , Hipertensión Pulmonar/fisiopatología , Modelos Animales de Enfermedad , Remodelación Vascular/efectos de los fármacos , Ratas Sprague-Dawley , Indoles/farmacología , Hipertrofia Ventricular Derecha/genética , Hipertrofia Ventricular Derecha/metabolismo , Hipertrofia Ventricular Derecha/fisiopatología , Pirroles
7.
Vaccines (Basel) ; 12(8)2024 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-39203987

RESUMEN

BACKGROUND: During the COVID-19 pandemic, identifying reliable biomarkers for predicting disease severity and patient outcomes in unvaccinated individuals is essential. This study evaluates the efficacy of key hematological markers, including leukocyte and neutrophil counts, Neutrophil-to-Lymphocyte Ratio (NLR), and cytokine profiles (IL-6, INF-γ, TNF-α, IL-17A, CCL2, and CXCL10) for predicting the necessity for mechanical ventilation and assessing survival probabilities. METHODS: We conducted an in-depth analysis on a cohort of COVID-19 patients, emphasizing the relationship between NLR, cytokine profiles, and clinical outcomes, utilizing routine leukocyte counting and cytokine quantification by flow cytometry. RESULTS: Elevated leukocyte and neutrophil counts, increased NLR, and significant cytokine elevations such as IL-6 and IL-10 were strongly associated with the need for mechanical ventilation, reflecting a pronounced systemic inflammatory response indicative of severe disease outcomes. CONCLUSION: Integrating hematological markers, particularly NLR and cytokine profiles, is crucial in predicting mechanical ventilation needs and survival in non-vaccinated COVID-19 patients. Our findings provide critical insights into the pathophysiology of COVID-19, supporting the development of more targeted clinical interventions and potentially informing future strategies for managing infectious disease outbreaks.

8.
Bioengineering (Basel) ; 11(8)2024 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-39199736

RESUMEN

Artificial intelligence (AI) is revolutionizing dentistry, offering new opportunities to improve the precision and efficiency of implantology. This literature review aims to evaluate the current evidence on the use of AI in implant planning assessment. The analysis was conducted through PubMed and Scopus search engines, using a combination of relevant keywords, including "artificial intelligence implantology", "AI implant planning", "AI dental implant", and "implantology artificial intelligence". Selected articles were carefully reviewed to identify studies reporting data on the effectiveness of AI in implant planning. The results of the literature review indicate a growing interest in the application of AI in implant planning, with evidence suggesting an improvement in precision and predictability compared to traditional methods. The summary of the obtained findings by the included studies represents the latest AI developments in implant planning, demonstrating its application for the automated detection of bones, the maxillary sinus, neuronal structure, and teeth. However, some disadvantages were also identified, including the need for high-quality training data and the lack of standardization in protocols. In conclusion, the use of AI in implant planning presents promising prospects for improving clinical outcomes and optimizing patient management. However, further research is needed to fully understand its potential and address the challenges associated with its implementation in clinical practice.

9.
Cancer Imaging ; 24(1): 111, 2024 Aug 20.
Artículo en Inglés | MEDLINE | ID: mdl-39164779

RESUMEN

BACKGROUND: Stereotactic radiotherapy is the preferred treatment for managing patients with fewer than five brain metastases (BMs). However, some lesions recur after irradiation. The purpose of this study was to identify patients who are at a higher risk of failure, which can help in adjusting treatments and preventing recurrence. METHODS: In this retrospective multicenter study, we analyzed the predictive significance of a set of interpretable morphological features derived from contrast-enhanced (CE) T1-weighted MR images as imaging biomarkers using Kaplan-Meier analysis. The feature sets studied included the total and necrotic volumes, the surface regularity and the CE rim width. Additionally, we evaluated other nonmorphological variables and performed multivariate Cox analysis. RESULTS: A total of 183 lesions in 128 patients were included (median age 61 [31-95], 64 men and 64 women) treated with stereotactic radiotherapy (57% single fraction, 43% fractionated radiotherapy). None of the studied variables measured at diagnosis were found to have prognostic value. However, the total and necrotic volumes and the CE rim width measured at the first follow-up after treatment and the change in volume due to irradiation can be used as imaging biomarkers for recurrence. The optimal classification was achieved by combining the changes in tumor volume before and after treatment with the presence or absence of necrosis (p < < 0.001). CONCLUSION: This study demonstrated the prognostic significance of interpretable morphological features extracted from routine clinical MR images following irradiation in brain metastases, offering valuable insights for personalized treatment strategies.


Asunto(s)
Neoplasias Encefálicas , Imagen por Resonancia Magnética , Humanos , Neoplasias Encefálicas/secundario , Neoplasias Encefálicas/diagnóstico por imagen , Neoplasias Encefálicas/radioterapia , Masculino , Femenino , Imagen por Resonancia Magnética/métodos , Persona de Mediana Edad , Anciano , Estudios Retrospectivos , Pronóstico , Adulto , Anciano de 80 o más Años , Radiocirugia/métodos , Recurrencia Local de Neoplasia/diagnóstico por imagen , Recurrencia Local de Neoplasia/patología , Medios de Contraste , Estimación de Kaplan-Meier
10.
Chaos ; 34(8)2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-39191245

RESUMEN

Chimeric antigen receptor T (CAR T) cell therapy has been proven to be successful against a variety of leukemias and lymphomas. This paper undertakes an analytical and numerical study of a mathematical model describing the competition of CAR T, leukemia, tumor, and B cells. Considering its significance in sustaining anti-CD19 CAR T-cell stimulation, a B-cell source term is integrated into the model. Through stability and bifurcation analyses, the potential for tumor eradication, contingent on the continuous influx of B cells, has been revealed, showing a transcritical bifurcation at a critical B-cell input. Additionally, an almost heteroclinic cycle between equilibrium points is identified, providing a theoretical basis for understanding disease relapse. Analyzing the oscillatory behavior of the system, the time-dependent dynamics of CAR T cells and leukemic cells can be approximated, shedding light on the impact of initial tumor burden on therapeutic outcomes. In conclusion, the study provides insights into CAR T-cell therapy dynamics for acute lymphoblastic leukemias, offering a theoretical foundation for clinical observations and suggesting avenues for future immunotherapy modeling research.


Asunto(s)
Linfocitos B , Inmunoterapia Adoptiva , Humanos , Linfocitos B/inmunología , Inmunoterapia Adoptiva/métodos , Leucemia/terapia , Leucemia/inmunología , Receptores Quiméricos de Antígenos/inmunología , Modelos Biológicos , Linfocitos T/inmunología
11.
Cancer Imaging ; 24(1): 113, 2024 Aug 26.
Artículo en Inglés | MEDLINE | ID: mdl-39187900

RESUMEN

BACKGROUND: Lung nodules observed in cancer screening are believed to grow exponentially, and their associated volume doubling time (VDT) has been proposed for nodule classification. This retrospective study aimed to elucidate the growth dynamics of lung nodules and determine the best classification as either benign or malignant. METHODS: Data were analyzed from 180 participants (73.7% male) enrolled in the I-ELCAP screening program (140 primary lung cancer and 40 benign) with three or more annual CT examinations before resection. Attenuation, volume, mass and growth patterns (decelerated, linear, subexponential, exponential and accelerated) were assessed and compared as classification methods. RESULTS: Most lung cancers (83/140) and few benign nodules (11/40) exhibited an accelerated, faster than exponential, growth pattern. Half (50%) of the benign nodules versus 26.4% of the malignant ones displayed decelerated growth. Differences in growth patterns allowed nodule malignancy to be classified, the most effective individual variable being the increase in volume between two-year-interval scans (ROC-AUC = 0.871). The same metric on the first two follow-ups yielded an AUC value of 0.769. Further classification into solid, part-solid or non-solid, improved results (ROC-AUC of 0.813 in the first year and 0.897 in the second year). CONCLUSIONS: In our dataset, most lung cancers exhibited accelerated growth in contrast to their benign counterparts. A measure of volumetric growth allowed discrimination between benign and malignant nodules. Its classification power increased when adding information on nodule compactness. The combination of these two meaningful and easily obtained variables could be used to assess malignancy of lung cancer nodules.


Asunto(s)
Detección Precoz del Cáncer , Neoplasias Pulmonares , Nódulo Pulmonar Solitario , Tomografía Computarizada por Rayos X , Humanos , Neoplasias Pulmonares/diagnóstico por imagen , Neoplasias Pulmonares/patología , Neoplasias Pulmonares/clasificación , Masculino , Estudios Retrospectivos , Femenino , Detección Precoz del Cáncer/métodos , Persona de Mediana Edad , Tomografía Computarizada por Rayos X/métodos , Anciano , Nódulo Pulmonar Solitario/diagnóstico por imagen , Nódulo Pulmonar Solitario/patología , Nódulos Pulmonares Múltiples/diagnóstico por imagen , Nódulos Pulmonares Múltiples/patología
12.
BMC Vet Res ; 20(1): 314, 2024 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-39010064

RESUMEN

Eimeria spp. are the pathogen that causes coccidiosis, a significant disease that affects intensively reared livestock, especially poultry. Anticoccidial feed additives, chemicals, and ionophores have routinely been employed to reduce Eimeria infections in broiler production. Therefore, the shift to antibiotic-free and organic farming necessitates novel coccidiosis preventive strategies. The present study evaluated the effects of potential feed additives, liver free and chitosan, against Eimeria tenella infection in White Leghorn broiler female chickens. One hundred sixty-five 1-day-old White Leghorn broiler female chicks were divided into 11 groups (15 female chicks per group), including the positive control group (G1), the negative control group (G2), a chitosan-treated group (G3), a chitosan-treated-infected group (G4), the liver free-treated group (G5), the liver free-treated-infected group (G6), the liver free-and-chitosan-treated group (G7), the liver free-and-chitosan-infected group (G8), the therapeutic liver free-and-chitosan-treated-infected group (G9), the sulfaquinoxaline-treated group (G10), and the sulfaquinoxaline-treated-infected group (G11). Chitosan was fed to the chicks in G3 and G4 as a preventative measure at a dose of 250 mg/kg. The G5 and G6 groups received 1.5 mg/kg of Liverfree. The G7 and G8 groups received chitosan and Liverfree. The G10 and G11 groups were administered 2 g/L of sulfaquinoxaline. From the moment the chicks arrived at Foshan University (one-day-old chicks) until the completion of the experiment, all medications were given to them as a preventative measure. G8 did; however, receive chitosan and liver free as therapeutic supplements at 7 dpi. The current study showed that the combination of liver free and chitosan can achieve better prophylactic and therapeutic effects than either alone. In E. tenella challenged chickens, G8 and G9 chickens showed reduced oocyst shedding and lesion score, improved growth performance (body weight, body weight gain, feed intake, feed conversion ratio, and mortality rate), and cecal histology. The current study demonstrates that combining liver free and chitosan has superior preventive and therapeutic benefits than either alone, and they could also be used as alternative anticoccidial agents.


Asunto(s)
Alimentación Animal , Pollos , Quitosano , Coccidiosis , Coccidiostáticos , Eimeria tenella , Hígado , Enfermedades de las Aves de Corral , Animales , Quitosano/farmacología , Quitosano/uso terapéutico , Coccidiosis/veterinaria , Coccidiosis/tratamiento farmacológico , Coccidiosis/parasitología , Coccidiosis/prevención & control , Eimeria tenella/efectos de los fármacos , Enfermedades de las Aves de Corral/tratamiento farmacológico , Enfermedades de las Aves de Corral/parasitología , Enfermedades de las Aves de Corral/prevención & control , Femenino , Coccidiostáticos/uso terapéutico , Coccidiostáticos/farmacología , Hígado/efectos de los fármacos , Hígado/parasitología
13.
Bull Math Biol ; 86(9): 108, 2024 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-39007985

RESUMEN

Fibrous dysplasia (FD) is a mosaic non-inheritable genetic disorder of the skeleton in which normal bone is replaced by structurally unsound fibro-osseous tissue. There is no curative treatment for FD, partly because its pathophysiology is not yet fully known. We present a simple mathematical model of the disease incorporating its basic known biology, to gain insight on the dynamics of the involved bone-cell populations, and shed light on its pathophysiology. We develop an analytical study of the model and study its basic properties. The existence and stability of steady states are studied, an analysis of sensitivity on the model parameters is done, and different numerical simulations provide findings in agreement with the analytical results. We discuss the model dynamics match with known facts on the disease, and how some open questions could be addressed using the model.


Asunto(s)
Simulación por Computador , Displasia Fibrosa Ósea , Conceptos Matemáticos , Modelos Biológicos , Mutación , Humanos , Displasia Fibrosa Ósea/genética , Displasia Fibrosa Ósea/patología , Osteoblastos/patología
14.
Pediatr Radiol ; 54(9): 1462-1472, 2024 08.
Artículo en Inglés | MEDLINE | ID: mdl-38980355

RESUMEN

BACKGROUND: Pectus excavatum (PE) is a common congenital chest wall deformity with various associated health concerns, including psychosocial impacts, academic challenges, and potential cardiopulmonary effects. OBJECTIVE: This study aimed to investigate the cardiac consequences of right atrioventricular groove compression in PE using cardiac magnetic resonance imaging. MATERIALS AND METHODS: A retrospective analysis was conducted on 661 patients with PE referred for evaluation. Patients were categorized into three groups based on the degree of right atrioventricular groove compression (no compression (NC), partial compression (PC), and complete compression(CC)). Chest wall indices were measured: pectus index (PI), depression index (DI), correction index (CI), and sternal torsion. RESULTS: The study revealed significant differences in chest wall indices between the groups: PE, NC=4.15 ± 0.94, PC=4.93 ± 1.24, and CC=7.2 ± 4.01 (P<0.0001). Left ventricle ejection fraction (LVEF) showed no significant differences: LVEF, NC=58.72% ± 3.94, PC=58.49% ± 4.02, and CC=57.95% ± 3.92 (P=0.0984). Right ventricular ejection fraction (RVEF) demonstrated significant differences: RVEF, NC=55.2% ± 5.3, PC=53.8% ± 4.4, and CC=53.1% ± 4.8 (P≥0.0001). Notably, the tricuspid valve (TV) measurement on the four-chamber view decreased in patients with greater compression: NC=29.52 ± 4.6; PC=28.26 ± 4.8; and CC=24.74 ± 5.73 (P<0.0001). CONCLUSION: This study provides valuable insights into the cardiac consequences of right atrioventricular groove compression in PE and lends further evidence of mild cardiac changes due to PE.


Asunto(s)
Tórax en Embudo , Humanos , Tórax en Embudo/diagnóstico por imagen , Tórax en Embudo/complicaciones , Tórax en Embudo/fisiopatología , Masculino , Femenino , Estudios Retrospectivos , Adolescente , Niño , Imagen por Resonancia Magnética/métodos , Válvula Tricúspide/diagnóstico por imagen , Válvula Tricúspide/fisiopatología , Adulto , Adulto Joven
15.
J Biol Chem ; 300(7): 107460, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38876306

RESUMEN

Obesity is a major risk factor for liver and cardiovascular diseases. However, obesity-driven mechanisms that contribute to the pathogenesis of multiple organ diseases are still obscure and treatment is inadequate. We hypothesized that increased , glucose-6-phosphate dehydrogenase (G6PD), the key rate-limiting enzyme in the pentose shunt, is critical in evoking metabolic reprogramming in multiple organs and is a significant contributor to the pathogenesis of liver and cardiovascular diseases. G6PD is induced by a carbohydrate-rich diet and insulin. Long-term (8 months) high-fat diet (HFD) feeding increased body weight and elicited metabolic reprogramming in visceral fat, liver, and aorta, of the wild-type rats. In addition, HFD increased inflammatory chemokines in visceral fat. Interestingly, CRISPR-edited loss-of-function Mediterranean G6PD variant (G6PDS188F) rats, which mimic human polymorphism, moderated HFD-induced weight gain and metabolic reprogramming in visceral fat, liver, and aorta. The G6PDS188F variant prevented HFD-induced CCL7 and adipocyte hypertrophy. Furthermore, the G6PDS188F variant increased Magel2 - a gene encoding circadian clock-related protein that suppresses obesity associated with Prader-Willi syndrome - and reduced HFD-induced non-alcoholic fatty liver. Additionally, the G6PDS188F variant reduced aging-induced aortic stiffening. Our findings suggest G6PD is a regulator of HFD-induced obesity, adipocyte hypertrophy, and fatty liver.


Asunto(s)
Adipocitos , Dieta Alta en Grasa , Hígado Graso , Glucosafosfato Deshidrogenasa , Hipertrofia , Obesidad , Animales , Glucosafosfato Deshidrogenasa/metabolismo , Glucosafosfato Deshidrogenasa/genética , Masculino , Ratas , Obesidad/metabolismo , Obesidad/genética , Obesidad/patología , Obesidad/etiología , Dieta Alta en Grasa/efectos adversos , Adipocitos/metabolismo , Adipocitos/patología , Hígado Graso/metabolismo , Hígado Graso/genética , Hígado Graso/patología , Hígado/metabolismo , Hígado/patología , Ratas Sprague-Dawley , Grasa Intraabdominal/metabolismo , Grasa Intraabdominal/patología
16.
Brain Res ; 1842: 149104, 2024 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-38945469

RESUMEN

Prolactin has been recognized as neuroprotective hormone against various types of neuronal damage. This study was aimed to determine if prolactin protects against streptozotocin injury. A series of experiments were performed to determine neuronal survival by counting total neurons in medial hippocampus cortex and cerebellum. Astrogliosis was determined by immunofluorescence assays using GFAP, and behavioral improvement by prolactin after neuronal damage was determined by open-field and light-dark box tests. Results demonstrated that prolactin induced significant neuronal survival in both the hippocampus and cortex, but not in the cerebellum. No increase in astrogliosis was identified, but a significant reduction in anxiety levels was observed. Overall data indicate that prolactin may protect against a complex form of cell damage including oxidant stress and metabolic disruption by streptozotocin. Prolactin may be helpful strategy in the treatment of neuronal damage in neurological diseases.


Asunto(s)
Hipocampo , Neuronas , Fármacos Neuroprotectores , Prolactina , Estreptozocina , Animales , Prolactina/metabolismo , Masculino , Fármacos Neuroprotectores/farmacología , Hipocampo/metabolismo , Hipocampo/efectos de los fármacos , Neuronas/metabolismo , Neuronas/efectos de los fármacos , Ratas , Neuroprotección/fisiología , Neuroprotección/efectos de los fármacos , Ratas Sprague-Dawley , Gliosis/metabolismo , Cerebelo/metabolismo , Cerebelo/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Supervivencia Celular/fisiología , Encéfalo/metabolismo , Encéfalo/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Estrés Oxidativo/fisiología
17.
Prim Care Diabetes ; 18(4): 458-465, 2024 08.
Artículo en Inglés | MEDLINE | ID: mdl-38862312

RESUMEN

AIMS: To assess the association between sociodemographic and clinical factors with body mass index (BMI) in a population at risk of type 2 diabetes (T2D) in Bogotá and Barranquilla, Colombia. METHODS: This cross-sectional study used data from the PREDICOL Study. Participants with a FINDRISC ≥ 12 who underwent an Oral Glucose Tolerance Test (OGTT) were included in the study (n=1166). The final analytical sample size was 1101 participants. Those with missing data were excluded from the analysis (n=65). The main outcome was body mass index (BMI), which was categorized as normal, overweight, and obese. We utilized unadjusted and adjusted ordinal logistic regression analysis to calculate odds ratios (OR) and 95 % confidence intervals (CI). RESULTS: The prevalence of overweight and obesity was 41 % (n=449) and 47 % (n=517), respectively. Participants with a 2-hour glucose ≥139 mg/dl had 1.71 times higher odds of being overweight or obese (regarding normal weight) than participants with normal 2-hour glucose values. In addition, being a woman, waist circumference altered, and blood pressure >120/80 mmHg were statistically significantly associated with a higher BMI. CONCLUSION: Strategies to control glycemia, blood pressure, and central adiposity are needed in people at risk of T2D. Future studies should be considered with a territorial and gender focus, considering behavioral, and sociocultural patterns.


Asunto(s)
Biomarcadores , Glucemia , Índice de Masa Corporal , Diabetes Mellitus Tipo 2 , Obesidad , Humanos , Diabetes Mellitus Tipo 2/epidemiología , Diabetes Mellitus Tipo 2/diagnóstico , Diabetes Mellitus Tipo 2/sangre , Colombia/epidemiología , Estudios Transversales , Femenino , Masculino , Factores de Riesgo , Persona de Mediana Edad , Prevalencia , Glucemia/metabolismo , Obesidad/epidemiología , Obesidad/diagnóstico , Adulto , Biomarcadores/sangre , Salud Urbana , Medición de Riesgo , Prueba de Tolerancia a la Glucosa , Anciano , Oportunidad Relativa , Factores Sexuales , Presión Sanguínea , Factores Sociodemográficos , Modelos Logísticos , Circunferencia de la Cintura
18.
Micromachines (Basel) ; 15(6)2024 Jun 18.
Artículo en Inglés | MEDLINE | ID: mdl-38930770

RESUMEN

p-type Ag-N dual acceptor doped ZnO thin films with long electrical stability were deposited by DC magnetron reactive co-sputtering technique. After deposition, the films were annealed at 400 °C for one hour in a nitrogen-controlled atmosphere. The deposited films were amorphous. However, after annealing, they crystallize in the typical hexagonal wurtzite structure of ZnO. The Ag-N dual acceptors were incorporated substitutionally in the structure of zinc oxide, and achieving that; the three samples presented the p-type conductivity in the ZnO. Initial electrical properties showed a low resistivity of from 1 to 10-3 Ω·cm, Hall mobility of tens cm2/V·s, and a hole concentration from 1017 to 1019 cm-3. The electrical stability analysis reveals that the p-type conductivity of the ZnO:Ag,N films is very stable and does not revert to n-type, even after 36 months of aging. These results reveal the feasibility of using these films for applications in short-wavelength or transparent optoelectronic devices.

19.
Psychopharmacology (Berl) ; 241(10): 2133-2144, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-38822849

RESUMEN

RATIONALE: Muscarinic receptor activity in the basolateral amygdala (BLA) is known to be involved in plasticity mechanisms that underlie emotional learning. The BLA is involved in the Attenuation of Neophobia, an incidental taste learning task in which a novel taste becomes familiar and recognized as safe. OBJECTIVE: Here we assessed the role of muscarinic receptor activity in the BLA in incidental taste learning. METHODS: Young adult male Wistar rats were bilaterally implanted with cannulas aimed at BLA. After recovery, rats were randomly assigned to either vehicle or muscarinic antagonist group, for each experiment. We tested the effect of specific and non-specific muscarinic antagonists administered either 1) 20 min before novel taste presentation; 2) immediately after novel taste presentation; 3) immediately after retrieval (the second taste presentation on Day 5 -S2-) or immediately after the fifth taste presentation on Day 8 (S5). RESULTS: Non-specific muscarinic receptor antagonist scopolamine infused prior to novel taste, while not affecting novel taste preference, abolished AN, i.e., the increased preference observed in control animals on the second presentation. When administered after taste consumption, intra-BLA scopolamine not only prevented AN but caused a steep decrease in the taste preference on the second presentation. This scopolamine-induced taste avoidance was not dependent on taste novelty, nor did it generalize to another novel taste. Targeting putative postsynaptic muscarinic receptors with specific M1 or M3 antagonists appeared to produce a partial taste avoidance, while M2 antagonism had no effect. CONCLUSION: These data suggest that if a salient gustatory experience is followed by muscarinic receptors antagonism in the BLA, it will be strongly and persistently avoided in the future. The study also shows that scopolamine is not just an amnesic drug, and its cognitive effects may be highly dependent on the task and the structure involved.


Asunto(s)
Reacción de Prevención , Complejo Nuclear Basolateral , Antagonistas Muscarínicos , Ratas Wistar , Sacarina , Escopolamina , Gusto , Animales , Escopolamina/farmacología , Escopolamina/administración & dosificación , Masculino , Antagonistas Muscarínicos/farmacología , Antagonistas Muscarínicos/administración & dosificación , Complejo Nuclear Basolateral/efectos de los fármacos , Complejo Nuclear Basolateral/metabolismo , Reacción de Prevención/efectos de los fármacos , Ratas , Sacarina/administración & dosificación , Gusto/efectos de los fármacos , Receptores Muscarínicos/metabolismo
20.
PeerJ ; 12: e17403, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38827299

RESUMEN

Background: Effective rehabilitation of upper limb musculoskeletal disorders requires multimodal assessment to guide clinicians' decision-making. Furthermore, a comprehensive assessment must include reliable tests. Nevertheless, the interrelationship among various upper limb tests remains unclear. This study aimed to evaluate the reliability of easily applicable upper extremity assessments, including absolute values and asymmetries of muscle mechanical properties, pressure pain threshold, active range of motion, maximal isometric strength, and manual dexterity. A secondary aim was to explore correlations between different assessment procedures to determine their interrelationship. Methods: Thirty healthy subjects participated in two experimental sessions with 1 week between sessions. Measurements involved using a digital myotonometer, algometer, inclinometer, dynamometer, and the Nine-Hole Peg test. Intraclass correlation coefficients, standard error of the mean, and minimum detectable change were calculated as reliability indicators. Pearson's correlation was used to assess the interrelationship between tests. Results: For the absolute values of the dominant and nondominant sides, reliability was 'good' to 'excellent' for muscle mechanical properties, pressure pain thresholds, active range of motion, maximal isometric strength, and manual dexterity. Similarly, the reliability for asymmetries ranged from 'moderate' to 'excellent' across the same parameters. Faster performance in the second session was consistently found for the Nine-Hole Peg test. No systematic inter-session errors were identified for the values of the asymmetries. No significant correlations were found between tests, indicating test independence. Conclusion: These findings indicate that the sensorimotor battery of tests is reliable, while monitoring asymmetry changes may offer a more conservative approach to effectively tracking recovery of upper extremity injuries.


Asunto(s)
Antebrazo , Mano , Rango del Movimiento Articular , Humanos , Masculino , Femenino , Reproducibilidad de los Resultados , Adulto , Rango del Movimiento Articular/fisiología , Mano/fisiología , Antebrazo/fisiología , Adulto Joven , Voluntarios Sanos , Músculo Esquelético/fisiología , Umbral del Dolor/fisiología
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