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1.
Heart Vessels ; 39(6): 486-495, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38393377

RESUMEN

This study examined the effects of pemafibrate, a selective peroxisome proliferator-activated receptor α agonist, on the serum biochemical parameters of male patients with coronary artery disease and metabolic syndrome (MetS). This was a post hoc analysis of a randomized, crossover study that treated hypertriglyceridemia with pemafibrate or bezafibrate for 24 weeks, followed by a crossover of another 24 weeks. Of the 60 patients enrolled in the study, 55 were male. Forty-one of 55 male patients were found to have MetS. In this sub-analysis, male patients with MetS (MetS group, n = 41) and those without MetS (non-MetS group, n = 14) were compared. The primary endpoint was a change in fasting serum triglyceride (TG) levels during pemafibrate therapy, and the secondary endpoints were changes in insulin resistance-related markers and liver function parameters. Serum TG levels significantly decreased (MetS group, from 266.6 to 148.0 mg/dL, p < 0.001; non-MetS group, from 203.9 to 97.6 mg/dL, p < 0.001); however, a percent change (%Change) was not significantly different between the groups (- 44.1% vs. - 51.6%, p = 0.084). Serum insulin levels and homeostasis model assessment of insulin resistance significantly decreased in the MetS group but not in the non-MetS group. %Change in liver enzyme levels was markedly decreased in the MetS group compared with that in the non-MetS group (alanine aminotransferase, - 25.1% vs. - 11.3%, p = 0.027; gamma-glutamyl transferase, - 45.8% vs. - 36.2%, p = 0.020). In conclusion, pemafibrate can effectively decrease TG levels in patients with MetS, and it may be a more efficient drug for improving insulin resistance and liver function in such patients.


Asunto(s)
Benzoxazoles , Butiratos , Enfermedad de la Arteria Coronaria , Estudios Cruzados , Hipertrigliceridemia , Resistencia a la Insulina , Síndrome Metabólico , Humanos , Masculino , Síndrome Metabólico/sangre , Síndrome Metabólico/tratamiento farmacológico , Síndrome Metabólico/complicaciones , Síndrome Metabólico/diagnóstico , Hipertrigliceridemia/sangre , Hipertrigliceridemia/tratamiento farmacológico , Hipertrigliceridemia/complicaciones , Hipertrigliceridemia/diagnóstico , Persona de Mediana Edad , Enfermedad de la Arteria Coronaria/sangre , Enfermedad de la Arteria Coronaria/tratamiento farmacológico , Benzoxazoles/uso terapéutico , Benzoxazoles/farmacología , Butiratos/uso terapéutico , Butiratos/farmacología , Resultado del Tratamiento , Anciano , Triglicéridos/sangre , Hipolipemiantes/uso terapéutico , Hipolipemiantes/farmacología , Biomarcadores/sangre , PPAR alfa/agonistas , Bezafibrato/uso terapéutico , Bezafibrato/farmacología
2.
Sci Rep ; 14(1): 2240, 2024 01 26.
Artículo en Inglés | MEDLINE | ID: mdl-38279013

RESUMEN

Muscle atrophy due to fragility fractures or frailty worsens not only activity of daily living and healthy life expectancy, but decreases life expectancy. Although several therapeutic agents for muscle atrophy have been investigated, none is yet in clinical use. Here we report that bezafibrate, a drug used to treat hyperlipidemia, can reduce immobilization-induced muscle atrophy in mice. Specifically, we used a drug repositioning approach to screen 144 drugs already utilized clinically for their ability to inhibit serum starvation-induced elevation of Atrogin-1, a factor related to muscle atrophy, in myotubes in vitro. Two candidates were selected, and here we demonstrate that one of them, bezafibrate, significantly reduced muscle atrophy in an in vivo model of muscle atrophy induced by leg immobilization. In gastrocnemius muscle, immobilization reduced muscle weight by an average of ~ 17.2%, and bezafibrate treatment prevented ~ 40.5% of that atrophy. In vitro, bezafibrate significantly inhibited expression of the inflammatory cytokine Tnfa in lipopolysaccharide-stimulated RAW264.7 cells, a murine macrophage line. Finally, we show that expression of Tnfa and IL-1b is induced in gastrocnemius muscle in the leg immobilization model, an activity significantly antagonized by bezafibrate administration in vivo. We conclude that bezafibrate could serve as a therapeutic agent for immobilization-induced muscle atrophy.


Asunto(s)
Bezafibrato , Atrofia Muscular , Ratones , Animales , Bezafibrato/farmacología , Atrofia Muscular/tratamiento farmacológico , Atrofia Muscular/etiología , Atrofia Muscular/metabolismo , Músculo Esquelético/metabolismo , Fibras Musculares Esqueléticas/metabolismo
3.
Huan Jing Ke Xue ; 44(11): 6149-6158, 2023 Nov 08.
Artículo en Chino | MEDLINE | ID: mdl-37973098

RESUMEN

Pharmaceutically active compounds(PhACs) have become a class of new pollutants in the environment after extensive production and use of PhACs in China. To investigate the pollution characteristics of PhACs in Guangdong Province, raw sewage was collected from 186 sewage treatment plants in 21 cities, including 178 townships and administrative districts in Guangdong Province. The pollution levels of ten typical PhACs in influent water of sewage treatment plants were analyzed using automatic solid phase extraction and high performance liquid chromatography-triple quadrupole mass spectrometry. The spatial distribution characteristics of PhACs in Guangdong Province were fully revealed, and the potential ecological risks of PhACs were evaluated. The results showed that PhACs were detected in all wastewater plants, and the mass concentration of PhACs ranged from 21.00 to 9558.25 ng·L-1. Metoprolo, acetaminophen, bezafibrate, and caffeine were the main pollutants. In terms of spatial distribution, the average mass concentration of ΣPhACs in various regions of Guangdong Province was in the following order:Pearl River Delta>North Guangdong>East Guangdong≈West Guangdong. When the mass concentration of ΣPhACs was over 2500 ng·L-1 in the influent water of sewage treatment plants, the concentration of PhACs in effluent was estimated according to the sewage disposal technology. The ecological risk of PhACs was carried out based on the effluent. The results revealed that the ecological risk of PhACs was low in Guangdong Province, and the risk of bezafibrate was moderate in the cities of Shaoguan, Jiangmen, and Shenzhen. The highest ecological risk of ΣPhACs was located in Shaoguan.


Asunto(s)
Aguas del Alcantarillado , Contaminantes Químicos del Agua , Aguas del Alcantarillado/química , Contaminantes Químicos del Agua/análisis , Bezafibrato/análisis , Monitoreo del Ambiente/métodos , Agua/análisis , Medición de Riesgo , China , Preparaciones Farmacéuticas
4.
Int Immunopharmacol ; 123: 110751, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-37567013

RESUMEN

Acute lung injury (ALI) serves as a common life-threatening clinical syndrome with high mortality rates, which is characterized by disturbed mitochondrial dynamics in pulmonary epithelial barrier. Peroxisome proliferator-activated receptor-γ (PPAR-γ) is one of the critical nuclear receptors, exerting important roles in preserving mitochondrial dynamics equilibrium. Previous studies have suggested that bezafibrate (BEZ), a PPAR-γ agonist, could improve obesity and insulin resistance. In the present study, we explored whether bezafibrate could attenuate lipopolysaccharide (LPS)-induced ALI in vivo and in vitro. Using C57BL/6 mice exposed to LPS, we observed that BEZ pretreatment (100 mg/kg) for 7 days decreased lung pathologic injury, reduced oxidative stress, suppressed inflammation and apoptosis, accompanied by shifting the dynamic course of mitochondria from fission into fusion. Meanwhile, we observed that BEZ could reverse the inhibition of PPAR-γ in lung tissues from LPS-treated mice. In vitro experiments also disclosed that BEZ could improve cell viability in primary pulmonary epithelial cells in a concentration-dependent manner. And BEZ (80 µM) treatment could not only inhibit oxidative stress but also preserve mitochondrial dynamics equilibrium in primary pulmonary epithelial cells. However, PPAR-γ knockdown partially abolished BEZ-mediated antioxidation and completely offset its regulatory effects on mitochondrial dynamics in primary pulmonary epithelial cells. In PPAR-γ-deficient mice, BEZ lost its pulmonary protection including anti-inflammatory and antioxidative effects in mice with ALI. Taken together, BEZ could attenuate ALI by preserving mitochondrial dynamics equilibrium in pulmonary epithelial cells in a PPAR-γ-dependent manner.


Asunto(s)
Lesión Pulmonar Aguda , Bezafibrato , Ratones , Animales , Bezafibrato/farmacología , Bezafibrato/uso terapéutico , Lipopolisacáridos/efectos adversos , Dinámicas Mitocondriales , Ratones Endogámicos C57BL , Pulmón , Lesión Pulmonar Aguda/inducido químicamente , PPAR gamma , Células Epiteliales , Antioxidantes
5.
Int J Clin Pharmacol Ther ; 61(10): 437-444, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-37548458

RESUMEN

OBJECTIVE: Among fibrates as triglyceride-lowering agents, bezafibrate and fenofibrate are predominantly renally excreted, while pemafibrate is mainly hepatically metabolized and biliary excreted. To elucidate possible different properties among fibrates, this retrospective observational study examined the changes in clinical laboratory parameters, including indices of renal function and glucose metabolism, in cases of switching from bezafibrate to pemafibrate. MATERIALS AND METHODS: In 93 patients with hypertriglyceridemia, the average values of laboratory parameters including serum creatinine, estimated glomerular filtration rate (eGFR), plasma glucose, and hemoglobin A1c on respective two occasions before and after switching from bezafibrate to pemafibrate were evaluated. RESULTS: Triglycerides, low-density and high-density lipoprotein cholesterol, creatine kinase, and uric acid did not change before and after switching from bezafibrate to pemafibrate. Serum creatinine significantly decreased and eGFR significantly increased after switching from bezafibrate to pemafibrate (p < 0.001, respectively). Plasma glucose tended to increase (p = 0.070) and hemoglobin A1c significantly increased (p < 0.001) after switching to pemafibrate. The degrees of changes in creatinine, eGFR, glucose, and hemoglobin A1c before and after drug switching were not affected by the presence or absence of coexisting disease, and with or without drug treatment including statin and renin-angiotensin system inhibitor. CONCLUSION: Our findings indicate that switching from bezafibrate to pemafibrate produces a significant decrease in serum creatinine and increases in eGFR and hemoglobin A1c in patients with hypertriglyceridemia, suggesting that the effects on renal function and glucose metabolism differ among fibrates.


Asunto(s)
Bezafibrato , Hipertrigliceridemia , Humanos , Bezafibrato/efectos adversos , Glucemia , Hemoglobina Glucada , Creatinina , Hipertrigliceridemia/diagnóstico , Hipertrigliceridemia/tratamiento farmacológico , Hipertrigliceridemia/metabolismo , Triglicéridos/metabolismo , Triglicéridos/uso terapéutico , Ácidos Fíbricos/uso terapéutico , Glucosa/uso terapéutico , Riñón/fisiología
6.
Biochim Biophys Acta Mol Basis Dis ; 1869(8): 166841, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-37558011

RESUMEN

Mitochondrial dysfunction plays an important role in the pathogenesis of Alzheimer's disease (AD), the most common neurodegenerative disease. Prior studies suggested impaired mitochondrial biogenesis likely contributes to mitochondrial dysfunction in AD. Bezafibrate, a peroxisome proliferator-activated receptor (PPAR) pan-agonist, has been shown to enhance mitochondrial biogenesis and increase oxidative phosphorylation capacity. In the present study, we investigated whether bezafibrate could rescue mitochondrial dysfunction and other AD-related deficits in 5xFAD mice. Bezafibrate was well tolerated by 5xFAD mice. Indeed, it rescued the expression of key mitochondrial proteins as well as mitochondrial dynamics and function in the brain of 5xFAD mice. Importantly, bezafibrate treatment led to significant improvement of cognitive/memory function in 5xFAD mice accompanied by alleviation of amyloid pathology and neuronal loss as well as reduced oxidative stress and neuroinflammation. Overall, this study suggests that bezafibrate improves mitochondrial function, mitigates neuroinflammation and improves cognitive functions in 5xFAD mice, thus supporting the notion that enhancing mitochondrial biogenesis/function is a promising therapeutic strategy for AD.


Asunto(s)
Enfermedad de Alzheimer , Enfermedades Neurodegenerativas , Ratones , Animales , Enfermedad de Alzheimer/tratamiento farmacológico , Enfermedad de Alzheimer/genética , Enfermedad de Alzheimer/metabolismo , Bezafibrato/farmacología , Bezafibrato/uso terapéutico , Neuroprotección , Enfermedades Neuroinflamatorias
7.
Cells ; 12(12)2023 06 06.
Artículo en Inglés | MEDLINE | ID: mdl-37371027

RESUMEN

Sulfite predominantly accumulates in the brain of patients with isolated sulfite oxidase (ISOD) and molybdenum cofactor (MoCD) deficiencies. Patients present with severe neurological symptoms and basal ganglia alterations, the pathophysiology of which is not fully established. Therapies are ineffective. To elucidate the pathomechanisms of ISOD and MoCD, we investigated the effects of intrastriatal administration of sulfite on myelin structure, neuroinflammation, and oxidative stress in rat striatum. Sulfite administration decreased FluoromyelinTM and myelin basic protein staining, suggesting myelin abnormalities. Sulfite also increased the staining of NG2, a protein marker of oligodendrocyte progenitor cells. In line with this, sulfite also reduced the viability of MO3.13 cells, which express oligodendroglial markers. Furthermore, sulfite altered the expression of interleukin-1ß (IL-1ß), interleukin-6 (IL-6), interleukin-10 (IL-10), cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS) and heme oxygenase-1 (HO-1), indicating neuroinflammation and redox homeostasis disturbances. Iba1 staining, another marker of neuroinflammation, was also increased by sulfite. These data suggest that myelin changes and neuroinflammation induced by sulfite contribute to the pathophysiology of ISOD and MoCD. Notably, post-treatment with bezafibrate (BEZ), a pan-PPAR agonist, mitigated alterations in myelin markers and Iba1 staining, and IL-1ß, IL-6, iNOS and HO-1 expression in the striatum. MO3.13 cell viability decrease was further prevented. Moreover, pre-treatment with BEZ also attenuated some effects. These findings show the modulation of PPAR as a potential opportunity for therapeutic intervention in these disorders.


Asunto(s)
Bezafibrato , Receptores Activados del Proliferador del Peroxisoma , Ratas , Animales , Bezafibrato/farmacología , Receptores Activados del Proliferador del Peroxisoma/farmacología , Vaina de Mielina , Enfermedades Neuroinflamatorias , Interleucina-6/farmacología , Estrés Oxidativo , Sulfitos/farmacología
8.
J Hazard Mater ; 458: 131904, 2023 09 15.
Artículo en Inglés | MEDLINE | ID: mdl-37356174

RESUMEN

Pharmaceuticals and microplastics constitute potential hazards in aquatic systems, but their combined effects and underlying toxicity mechanisms remain largely unknown. In this study, a simultaneous characterization of bioaccumulation, associated metabolomic alterations and potential recovery mechanisms was performed. Specifically, a bioassay on Mediterranean mussels (Mytilus galloprovincialis) was carried out with polyethylene microplastics (PE-MPLs, 1 mg/L) and citalopram or bezafibrate (500 ng/L). Single and co-exposure scenarios lasted 21 days, followed by a 7-day depuration period to assess their potential recovery. PE-MPLs delayed the bioaccumulation of citalopram (lower mean at 10 d: 447 compared to 770 ng/g dw under single exposure), although reaching similar tissue concentrations after 21 d. A more limited accumulation of bezafibrate was observed overall, regardless of PE-MPLs co-exposure (

Asunto(s)
Mytilus , Contaminantes Químicos del Agua , Animales , Microplásticos/metabolismo , Polietileno/metabolismo , Bezafibrato/metabolismo , Bezafibrato/farmacología , Plásticos/metabolismo , Citalopram/metabolismo , Citalopram/farmacología , Bioacumulación , Preparaciones Farmacéuticas/metabolismo , Contaminantes Químicos del Agua/análisis
9.
Naunyn Schmiedebergs Arch Pharmacol ; 396(12): 3857-3866, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-37358795

RESUMEN

In pulmonary fibrosis, the proliferation of fibroblasts and their differentiation into myofibroblasts is often caused by tissue damage, such as oxidative damage caused by reactive oxygen species, which leads to progressive rupture and thus destruction of the alveolar architecture, resulting in cell proliferation and tissue remodeling. Bezafibrate (BZF) is an important member of the peroxisome proliferator-activated receptor (PPARs) family agonists, used in clinical practice as antihyperlipidemic. However, the antifibrotic effects of BZF are still poorly studied. The objective of this study was to evaluate the effects of BZF on pulmonary oxidative damage in lung fibroblast cells. MRC-5 cells were treated with hydrogen peroxide (H2O2) to induce oxidative stress activation and BZF treatment was administered at the same moment as H2O2 induction. The outcomes evaluated were cell proliferation and cell viability; oxidative stress markers such as reactive oxygen species (ROS), catalase (CAT) levels and thiobarbituric acid reactive substances (TBARS); col-1 and α-SMA mRNA expression and cellular elasticity through Young's modulus analysis evaluated by atomic force microscopy (AFM). The H2O2-induced oxidative damage decreased the cell viability and increased ROS levels and decreased CAT activity in MRC-5 cells. The expression of α-SMA and the cell stiffness increased in response to H2O2 treatment. Treatment with BZF decreased the MRC-5 cell proliferation, ROS levels, reestablished CAT levels, decreased the mRNA expression of type I collagen protein (col-1) and α-smooth muscle actin (α-SMA), and cellular elasticity even with H2O2 induction. Our results suggest that BZF has a potential protective effect on H2O2-induced oxidative stress. These results are based on an in vitro experiment, derived from a fetal lung cell line and may emerge as a possible new therapy for the treatment of pulmonary fibrosis.


Asunto(s)
Peróxido de Hidrógeno , Fibrosis Pulmonar , Humanos , Peróxido de Hidrógeno/toxicidad , Peróxido de Hidrógeno/metabolismo , Especies Reactivas de Oxígeno/metabolismo , Bezafibrato/farmacología , Bezafibrato/metabolismo , Fibrosis Pulmonar/patología , Pulmón/metabolismo , Estrés Oxidativo , Fibroblastos , ARN Mensajero/metabolismo
10.
Appl Biochem Biotechnol ; 195(12): 7520-7552, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37010741

RESUMEN

The unexpected rise in cancer and diabetes statistics has been a significant global threat, inciting ongoing research into various biomarkers that can act as innovative therapeutic targets for their management. The recent discovery of how EZH2-PPARs' regulatory function affects the metabolic and signalling pathways contributing to this disease has posed a significant breakthrough, with the synergistic combination of inhibitors like GSK-126 and bezafibrate for treating these diseases. Nonetheless, no findings on other protein biomarkers involved in the associated side effects have been reported. As a result of this virtual study, we identified the gene-disease association, protein interaction networks between EZH2-PPARs and other protein biomarkers regulating pancreatic cancer and diabetes pathology, ADME/Toxicity profiling, docking simulation and density functional theory of some natural products. The results indicated a correlation between obesity and hypertensive disease for the investigated biomarkers. At the same time, the predicted protein network validates the link to cancer and diabetes, and nine natural products were screened to have versatile binding capacity against the targets. Among all natural products, phytocassane A outperforms the standard drugs' (GSK-126 and bezafibrate) in silico validation for drug-likeness profiles. Hence, these natural products were conclusively proposed for additional experimental screening to complement the results on their utility in drug development for diabetes and cancer therapy against the EZH2-PPARs' new target.


Asunto(s)
Productos Biológicos , Diabetes Mellitus , Neoplasias , Humanos , Insulina , Receptores Activados del Proliferador del Peroxisoma , Bezafibrato , Estudios Prospectivos , Neoplasias/tratamiento farmacológico , Neoplasias/genética , Diabetes Mellitus/tratamiento farmacológico , Diabetes Mellitus/genética , Productos Biológicos/farmacología , Biomarcadores , Simulación del Acoplamiento Molecular , Proteína Potenciadora del Homólogo Zeste 2/genética
11.
Toxicol Lett ; 381: 48-59, 2023 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-37116597

RESUMEN

Redox homeostasis, mitochondrial functions, and mitochondria-endoplasmic reticulum (ER) communication were evaluated in the striatum of rats after 3-nitropropionic acid (3-NP) administration, a recognized chemical model of Huntington's disease (HD). 3-NP impaired redox homeostasis by increasing malondialdehyde levels at 28 days, decreasing glutathione (GSH) concentrations at 21 and 28 days, and the activities of glutathione peroxidase (GPx), superoxide dismutase (SOD) and glutathione S-transferase at 7, 21, and 28 days, catalase at 21 days, and glutathione reductase at 21 and 28 days. Impairment of mitochondrial respiration at 7 and 28 days after 3-NP administration was also observed, as well as reduced activities of succinate dehydrogenase (SDH) and respiratory chain complexes. 3-NP also impaired mitochondrial dynamics and the interactions between ER and mitochondria and induced ER-stress by increasing the levels of mitofusin-1, and of DRP1, VDAC1, Grp75 and Grp78. Synaptophysin levels were augmented at 7 days but reduced at 28 days after 3-NP injection. Finally, bezafibrate prevented 3-NP-induced alterations of the activities of SOD, GPx, SDH and respiratory chain complexes, DCFH oxidation and on the levels of GSH, VDAC1 and synaptophysin. Mitochondrial dysfunction and synaptic disruption may contribute to the pathophysiology of HD and bezafibrate may be considered as an adjuvant therapy for this disorder.


Asunto(s)
Enfermedad de Huntington , Ratas , Animales , Enfermedad de Huntington/inducido químicamente , Enfermedad de Huntington/tratamiento farmacológico , Enfermedad de Huntington/metabolismo , Ratas Wistar , Bezafibrato/efectos adversos , Bezafibrato/metabolismo , Sinaptofisina/metabolismo , Modelos Químicos , Estrés Oxidativo , Glutatión/metabolismo , Superóxido Dismutasa/metabolismo , Mitocondrias/metabolismo , Propionatos/toxicidad , Nitrocompuestos/toxicidad , Nitrocompuestos/metabolismo
13.
Cell Metab ; 35(5): 855-874.e5, 2023 05 02.
Artículo en Inglés | MEDLINE | ID: mdl-37084732

RESUMEN

VLCFAs (very-long-chain fatty acids) are the most abundant fatty acids in myelin. Hence, during demyelination or aging, glia are exposed to higher levels of VLCFA than normal. We report that glia convert these VLCFA into sphingosine-1-phosphate (S1P) via a glial-specific S1P pathway. Excess S1P causes neuroinflammation, NF-κB activation, and macrophage infiltration into the CNS. Suppressing the function of S1P in fly glia or neurons, or administration of Fingolimod, an S1P receptor antagonist, strongly attenuates the phenotypes caused by excess VLCFAs. In contrast, elevating the VLCFA levels in glia and immune cells exacerbates these phenotypes. Elevated VLCFA and S1P are also toxic in vertebrates based on a mouse model of multiple sclerosis (MS), experimental autoimmune encephalomyelitis (EAE). Indeed, reducing VLCFA with bezafibrate ameliorates the phenotypes. Moreover, simultaneous use of bezafibrate and fingolimod synergizes to improve EAE, suggesting that lowering VLCFA and S1P is a treatment avenue for MS.


Asunto(s)
Encefalomielitis Autoinmune Experimental , Esclerosis Múltiple , Ratones , Animales , Clorhidrato de Fingolimod/farmacología , Clorhidrato de Fingolimod/uso terapéutico , Inmunosupresores/farmacología , Enfermedades Neuroinflamatorias , Bezafibrato , Glicoles de Propileno/farmacología , Encefalomielitis Autoinmune Experimental/tratamiento farmacológico , Encefalomielitis Autoinmune Experimental/metabolismo , Neuroglía/metabolismo , Ácidos Grasos
14.
Water Res ; 233: 119809, 2023 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-36878179

RESUMEN

Chlorite (ClO2-) is an undesirable toxic byproduct commonly produced in the chlorine dioxide and ultraviolet/chlorine dioxide oxidation processes. Various methods have been developed to remove ClO2- but require additional chemicals or energy input. In this study, an overlooked mitigation pathway of ClO2- by solar light photolysis with a bonus for simultaneous removal of micropollutant co-present was reported. ClO2- could be efficiently decomposed to chloride (Cl-) and chlorate by simulated solar light (SSL) at water-relevant pHs with Cl- yield up to 65% at neutral pH. Multiple reactive species including hydroxyl radical (•OH), ozone (O3), chloride radical (Cl•), and chlorine oxide radical (ClO•) were generated in the SSL/ClO2- system with the steady-state concentrations following the order of O3 (≈ 0.8 µΜ) > ClO• (≈ 4.4 × 10-6 µΜ)> •OH (≈ 1.1 × 10-7 µΜ)> Cl• (≈ 6.8 × 10-8 µΜ) at neutral pH under investigated condition. Bezafibrate (BZF) as well as the selected six other micropollutants was efficiently degraded by the SSL/ClO2- system with pseudofirst-order rate constants ranging from 0.057 to 0.21 min-1 at pH 7.0, while most of them were negligibly degraded by SSL or ClO2- treatment alone. Kinetic modeling of BZF degradation by SSL/ClO2- at pHs 6.0 - 8.0 suggested that •OH contributed the most, followed by Cl•, O3, and ClO•. The presence of water background components (i.e., humic acid, bicarbonate, and chloride) exhibited negative effects on BZF degradation by the SSL/ClO2- system, mainly due to their competitive scavenging of reactive species therein. The mitigation of ClO2- and BZF under photolysis by natural solar light or in realistic waters was also confirmed. This study discovered an overlooked natural mitigation pathway for ClO2- and micropollutants, which has significant implications for understanding their fate in natural environments.


Asunto(s)
Compuestos de Cloro , Contaminantes Químicos del Agua , Purificación del Agua , Cloruros , Fotólisis , Óxidos , Oxidación-Reducción , Bezafibrato , Agua , Cloro , Purificación del Agua/métodos , Contaminantes Químicos del Agua/análisis
15.
Medicine (Baltimore) ; 102(7): e32818, 2023 Feb 17.
Artículo en Inglés | MEDLINE | ID: mdl-36800602

RESUMEN

Hypertriglyceridemia and chronic kidney disease (CKD) are known risk factors for cardiovascular disease. However, treatment with statins, which control low-density lipoprotein cholesterol levels, increases the risk of estimated glomerular filtration rate (eGFR) reduction. Although conventional fibrates, such as bezafibrate (Beza-F) and fenofibrate (Feno-F), are the mainstay for hypertriglyceridemia treatment, they may be associated with a risk of increased serum creatinine level and renal dysfunction. Pemafibrate (Pema) is pharmacologically defined as a selective peroxisomal proliferator-activated receptor α modulator which is excreted in bile and not likely to cause renal dysfunction. We evaluated the efficacy and safety of switching from Beza-F or Feno-F to Pema in CKD patients with hypertriglyceridemia. We recruited 47 CKD patients with hypertriglyceridemia who were receiving Beza-F, Feno-F, or eicosapentaenoic acid (EPA) but were switched to Pema from 2018 to 2021. A retrospective analysis of renal function and lipid profiles was performed before and 24 weeks after switching. CKD patients switching from EPA to Pema were used as study control. The effect of Pema on hypertriglyceridemia was equivalent to that of Beza-F or Feno-F. However, after switching to Pema, eGFR showed a marked average improvement of 10.2 mL/min/1.73 m2 (P < .001). Improvement in eGFR and levels of n-acetyl-ß-d-glucosaminidase and ß-2-microglobulin was observed only in cases of switching from Beza-F or Feno-F but not from EPA. Although Beza-F and Feno-F are useful medications for the treatment of hypertriglyceridemia, these are associated with a high risk of renal dysfunction. We also found that the deterioration in eGFR due to Beza-F or Feno-F is reversible with drug withdrawal and may not increase the risk for long-term renal dysfunction. We suggest that Pema may be an effective and safe treatment for hypertriglyceridemia in CKD patients.


Asunto(s)
Hipertrigliceridemia , Insuficiencia Renal Crónica , Insuficiencia Renal , Humanos , Fenofibrato , Hipertrigliceridemia/complicaciones , Insuficiencia Renal/complicaciones , Insuficiencia Renal Crónica/complicaciones , Insuficiencia Renal Crónica/tratamiento farmacológico , Insuficiencia Renal Crónica/inducido químicamente , Estudios Retrospectivos , Sustitución de Medicamentos , Bezafibrato
16.
Artículo en Inglés | MEDLINE | ID: mdl-36747332

RESUMEN

Dual-wavelength ultraviolet (DWUV) irradiation can lead to a synergistic effect in terms of accelerated degradation of emerging organic contaminants in aqueous media. This study compared the kinetics of single-wavelength and DWUV degradation of bisphenol A (BPA) and bezafibrate (BZF) in model aqueous solution using KrCl (222 nm), XeBr (282 nm) excilamps and LED (365 nm). Three novel dual combinations (222 + 282, 222 + 365 and 282 + 365 nm) were examined toward the potential synergy in direct photolysis and advanced oxidation processes (AOPs) using potassium persulfate and hydrogen peroxide. Kinetic comparison showed that the time- and fluence-based synergy did not occur in the dual combinations selected. Meanwhile, the single-wavelength UV treatment using KrCl excilamp was found to be highly efficient for degradation of target contaminants. At a given dosage of oxidants, the UV/S2O82- process exhibited higher performance than the UV/H2O2 one, attaining higher degradation rates and requiring lower UV fluences for 90% removal. This study demonstrates that the catalyst-free UV/S2O82- process using KrCl excilamp has a high potential for efficient removal of such organic contaminants from real waters with low turbidity.


Asunto(s)
Contaminantes Químicos del Agua , Purificación del Agua , Peróxido de Hidrógeno , Bezafibrato , Fenoles/efectos de la radiación , Oxidantes , Agua , Oxidación-Reducción , Contaminantes Químicos del Agua/análisis , Rayos Ultravioleta
17.
Artículo en Inglés | MEDLINE | ID: mdl-36833845

RESUMEN

Women of childbearing age have variations in substrate oxidation rates that can lead to overweight, type II diabetes, and other conditions that may be associated with metabolic inflexibility and the variations in estrogen concentrations observed during the monthly ovarian cycle. PURPOSE: This study aimed to verify and compare the influence of eight treadmill high-intensity interval training (HIT) sessions on carbohydrate and lipid oxidation rates (CHOox and LIPox, respectively) and intensities of ventilatory anaerobic thresholds (VATs) of women in different phases of the monthly ovarian cycle. METHODS: Eleven irregularly active women performed incremental treadmill exercise testing followed by submaximal work-rate running for 45 min to determine VATs, VO2peak, peak velocity (Vpeak), and substrate oxidation rates, before and after a training period, in different phases of their monthly ovarian cycle (follicular phase group, FL, n = 6; luteal phase group, LT, n = 5). The training period consisted of eight HIT sessions, composed each one of eight sets of 60 s running at 100%Vpeak interspersed by 75 s recovery every 48 h. RESULTS: Our results showed no significant differences in VATs intensities between groups. The comparison between groups showed significant differences in relative energy derived from CHO pre- and post-training of -61.42% and -59.26%, respectively, and LIP pre- and post-training of 27.46% and 34.41%, respectively. The relative energy derived from CHO after the training period was 18.89% and 25.50% higher for FL and LT, respectively; consequently, the relative energy derived from LIPox after the training period was 8,45% and 3.46% lower for FL and LT, respectively. Over the training period, Vpeak was ~13.5 km/h, which produced the relative intensities of ~89%VO2peak e ~93%HRpeak for both groups. CONCLUSION: The monthly ovarian cycle phases promote significant changes in substrate oxidation rates leading to a decrease in CHOox. High-intensity interval training can minimize the differences observed and constitute an alternative intervention.


Asunto(s)
Diabetes Mellitus Tipo 2 , Entrenamiento de Intervalos de Alta Intensidad , Femenino , Humanos , Bezafibrato , Metabolismo Energético , Ciclo Menstrual , Consumo de Oxígeno , Proyectos Piloto
18.
J Clin Gastroenterol ; 57(2): 143-152, 2023 02 01.
Artículo en Inglés | MEDLINE | ID: mdl-36598806

RESUMEN

GOALS: We aim to summarize the current management of pruritus in primary biliary cholangitis (PBC) by evaluating the efficacy and safety of pharmacological therapies. BACKGROUND: Pruritus is a common symptom of PBC, and evidence regarding the most effective antipruritic agents available is lacking. New pharmacotherapy for PBC has shown promising antipruritic effects. STUDY: We performed a systematic literature review and meta-analysis including all available double-blind, randomized, placebo-controlled clinical trials that evaluated the efficacy of pharmacotherapy for the symptomatic management of pruritus in PBC. Pruritus was assessed as either a change from baseline or a postintervention score. RESULTS: We included 33 studies and 20 medications. Using the visual analog scale, cholestyramine did not significantly improve pruritus compared with placebo [standardized mean differences (SMD): -0.94, 95% CI: -2.05 to 0.17], whereas rifampin and nalfurafine hydrochloride both significantly improved pruritus (SMD: -3.29, 95% CI: -5.78 to -0.80; n=23 and SMD: -0.58, 95% CI: -1.04 to -0.12). In addition, Bezafibrate and linerixibat significantly improved pruritus (SMD: -1.05, 95% CI: -1.41 to -0.68; n=110 and SMD: -0.31, 95% CI: -0.62 to -0.04, respectively). This effect was also present within the subgroup analysis by pruritus scale, where both bezafibrate and linerixibat significantly improved pruritus compared with placebo (SMD: -1.09, 95% CI: -1.54 to -0.65; P <0.001; visual analog scale; as postintervention score and SMD: -0.31, 95% CI: -0.62 to -0.01; P =0.04; numeric rating scale; as a change from baseline score, respectively). CONCLUSIONS: Bezafibrate and Linerixibat are potential second-line antipruritic medications for PBC, particularly those with moderate to severe pruritus.


Asunto(s)
Cirrosis Hepática Biliar , Humanos , Cirrosis Hepática Biliar/complicaciones , Cirrosis Hepática Biliar/tratamiento farmacológico , Antipruriginosos/uso terapéutico , Resultado del Tratamiento , Bezafibrato/uso terapéutico , Ensayos Clínicos Controlados Aleatorios como Asunto , Prurito/tratamiento farmacológico , Prurito/etiología
19.
Anal Chem ; 95(2): 889-897, 2023 01 17.
Artículo en Inglés | MEDLINE | ID: mdl-36537841

RESUMEN

The time since deposition (TSD) of latent fingermarks (LFMs) serves as "witnesses" for crime scene reconstructions. Nevertheless, existing TSD prediction approaches focused on either physical or chemical aging parameters leading to inaccurate estimation. A novel label-free protocol has been developed, where both physical ridge patterns and lipid oxide (LipOx) degradation kinetics are realized using optical microscopy and scanning electrochemical microscopy (SECM) and combined for TSD prediction. Specifically, the surface interrogation (SI)-SECM titration was utilized to monitor the LipOx degradation in LFM arrays aligned by hole array masks, through which we derived the LipOx degradation function. After establishing the relationship between several titration parameters and titrated area by experimental and numerical simulation methods, the titrated area could be reasonably estimated and subsequently used to calculate the surface coverage of LipOx. Results demonstrated that the tip transient revealed the LipOx coverage of deposited LFMs. Notably, LipOx coverage was found to increase during the first day and then decrease over time, whose degradation rate was susceptible to light. Thus, TSD candidates of an LFM could be limited to two values through the established function. Due to the nonmonotonic trend of LipOx aging, a physical parameter "the gray value ratio (GVR) of furrows to ridges" was proposed to exclude irrelevant TSD through support vector machine (SVM) classification. Ultimately, we predicted TSDs of seven LFMs with estimation errors of 2.2-26.8%. Overall, our strategy, with the outperformed capability of gleaning physical and electrochemical information on LFMs, can provide a truly label-free way of studying LFMs and hold great promise for multidimensional fingerprint information analysis.


Asunto(s)
Bezafibrato , Microscopía
20.
J Atheroscler Thromb ; 30(5): 443-454, 2023 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-35768226

RESUMEN

AIM: Pemafibrate is a highly selective agonist for peroxisome proliferator-activated receptor (PPAR)-α, a key regulator of lipid and glucose metabolism. We compared the efficacy and safety of pemafibrate with those of bezafibrate, a nonselective PPAR-α agonist. METHODS: In this randomized crossover study, 60 patients with hypertriglyceridemia (fasting triglyceride [TG] ≥ 150 mg/dL) were treated with pemafibrate of 0.2 mg/day or bezafibrate of 400 mg/day for 24 weeks. The primary endpoint was percent change (%Change) from baseline in TG levels, while the secondary endpoints were %Change in high-density lipoprotein cholesterol (HDL-C) and apolipoprotein A-I (Apo A-I) levels. RESULTS: The %Change in TG and Apo A-I levels was significantly greater with pemafibrate than with bezafibrate (-46.1% vs. -34.7%, p<0.001; 9.2% vs. 5.7%, p =0.018, respectively). %Change in HDL-C levels was not significantly different between the two treatments. %Change in liver enzyme levels was markedly decreased with pemafibrate than with bezafibrate. Creatinine levels significantly increased in both treatments; however, its %Change was significantly lower with pemafibrate than with bezafibrate (5.72% vs. 15.5%, p<0.001). The incidence of adverse events (AEs) or serious AEs did not differ between the two treatments; however, the number of patients with elevated creatinine levels (≥ 0.5 mg/dL and/or 25% from baseline) was significantly higher in the bezafibrate group than in the pemafibrate group (14/60 vs. 3/60, p =0.004) [corrected]. CONCLUSION: Compared with bezafibrate, pemafibrate is more effective in decreasing TG levels and increasing Apo A-I levels and is safer regarding liver and renal function.


Asunto(s)
Apolipoproteína A-I , Bezafibrato , HDL-Colesterol , Hipertrigliceridemia , Humanos , Hipertrigliceridemia/tratamiento farmacológico , Bezafibrato/uso terapéutico , Butiratos/uso terapéutico , Benzoxazoles/uso terapéutico , Estudios Cruzados , Apolipoproteína A-I/sangre , Apolipoproteína A-I/efectos de los fármacos , HDL-Colesterol/sangre , HDL-Colesterol/efectos de los fármacos , Resultado del Tratamiento , Receptores Activados del Proliferador del Peroxisoma/metabolismo , Triglicéridos/metabolismo , Masculino , Femenino , Adulto , Persona de Mediana Edad , Anciano
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