Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 65
Filtrar
Mais filtros

País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Neurol Sci ; 45(2): 585-590, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37668828

RESUMO

BACKGROUND: The etiology of Parkinson's disease (PD) is not well known and there is increasing evidence that oxidative stress also plays an important role in its pathogenesis. Salusins alpha (salusin-α) and beta (salusin-ß) affect the central nervous system, vasculature, and kidneys to increase the inflammatory response in endothelial cells, stimulate oxidative stress, and increase monocyte-endothelial adhesion. Neuroinflammation and oxidative stress play roles in the etiopathogenesis of PD. PURPOSE: To investigate whether salusin-α and -ß are related to PD and whether they are correlated with the development of atherosclerosis, body mass index, disease duration, and the Parkinson's Hoehn and Yahr stage. RESULTS: The low-density lipoprotein cholesterol (LDL-C), total cholesterol, and salusin-ß levels were significantly lower and age was significantly higher in Parkinson patients compared to healthy controls (ρ < 0.005). We found a negative linear correlation between salusin-ß and the Hoehn and Yahr stage (ρ < 0.001, r = -0.515) in the patients. CONCLUSIONS: There was a relationship between salusin-ß and PD and a correlation between the salusin-ß levels and Parkinson's stage. A possible underlying disease mechanism is an increase in oxidative stress and decrease in neuroprotective effects due to low salusin-ß levels. Therefore, the effects of salusin-ß in treating Parkinson disease should be evaluated. Further studies are needed to understand the effects of salusin-ß treatment on preventing or slowing the course of PD.


Assuntos
Aterosclerose , Doença de Parkinson , Humanos , Doença de Parkinson/complicações , Células Endoteliais/patologia , Monócitos/patologia , Colesterol
2.
Sleep Breath ; 28(1): 459-465, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37550557

RESUMO

OBJECTIVE: Sexual dysfunction and sleep problems are common in women. Nevertheless, the relationship between sleep problems and sexual dysfunction during pregnancy has yet to be fully clarified. The aim of this study was to evaluate the relationship between sleep problems and sexual dysfunction in pregnant women. METHODS: The study had a cross-sectional design and the sample was determined by employing the G*Power program on the basis of the findings of a related study. Taking the correlation value between the Female Sexual Function Index (FSFI) and the Insomnia Severity Index (ISI) into account, it was found that the minimum sample size was 219 pregnant women. Healthy pregnant women who were literate, did not have a diagnosed psychiatric disease, did not have a mental disability or communication problems, were in the gestation period, were not restricted by their doctors in terms of engaging in sexual activity, and who were willing to participate were included. The study included those pregnant women who consecutively attended the NST polyclinic in a maternity hospital in a province in the Black Sea region of Turkey between January 2022 and August 2022. The Sociodemographic Information Form, the Pittsburgh Sleep Quality Index (PSQI), the ISI, and the FSFI were used to collect data. RESULTS: A total of 220 pregnant women took part. The women had a mean age of 27.4 ± 6.3. Of the pregnant women, all had poor sleep quality: 61% had insomnia problems; 30% had sexual dysfunction. When the relationships between the PSQI, ISI and FSFI were examined, there was a statistically significant positive correlation between the mean PSQI and ISI scores (p = 0.000). A statistically significant negative correlation was determined between the mean ISI and FSFI scores (p = 0.044). According to the multiple regression analysis, age did not significantly predict sexual function (ß = -0.112; t = -1.639; p = 0.103); insomnia severity predicted sexual function negatively (ß = -0.146; t = -2.136; p = 0.034). The explained variance was 2.6%. CONCLUSION: The findings suggest that sleep quality as measured by the PSQI does not correlate with female sexual dysfunction in pregnant women. However, severity of insomnia does correlate with sexual dysfunction.


Assuntos
Disfunções Sexuais Fisiológicas , Distúrbios do Início e da Manutenção do Sono , Feminino , Humanos , Gravidez , Adulto Jovem , Adulto , Gestantes , Distúrbios do Início e da Manutenção do Sono/diagnóstico , Distúrbios do Início e da Manutenção do Sono/epidemiologia , Turquia/epidemiologia , Estudos Transversais , Disfunções Sexuais Fisiológicas/epidemiologia
3.
Health Care Women Int ; 45(5): 562-578, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37010820

RESUMO

To compare the effects of nulliparous pregnant women listening to lullabies and self-selected music on reducing the anxiety and antenatal stress. This was a randomized controlled study. Lullaby group (LG) (n = 40) listened to the lullaby chosen by the researcher, mixed music group (MG) (n = 40) listened to self-selected music and control group (CG) (n = 40) received general care. Post-test anxiety and stress levels was lower in two intervention groups versus CG (p < 0.01). Post-test anxiety was lower in the MG versus LG (p < 0.01), however post-test stress levels were similar. Pregnant women listening to self-selected music at home is more effective in reducing anxiety.


Assuntos
Musicoterapia , Música , Feminino , Gravidez , Humanos , Gestantes , Ansiedade , Paridade
4.
Nurs Health Sci ; 26(3): e13136, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38960587

RESUMO

Postpartum depression is one of the most common mental health disorders in women after giving birth. This study was conducted to examine the effect of telecounseling support on depression in primiparous mothers. This study was conducted as a randomized controlled trial with a parallel group pretest-posttest design. The study comprised 50 participants each in the intervention and control groups. Face-to-face interviews were conducted with all participants, and the Maternal Information Form and the Edinburgh Postpartum Depression Scale (EPDS) were administered. The intervention group received telecounseling for 6 weeks, while the control group received routine postnatal care. After the 6-week period, EPDS was re-administered to both groups. In the intervention group, the EPDS mean score decreased from 7.12 ± 3.96 to 6.34 ± 3.73 after telecounseling (p < 0.001). Conversely, in the control group, the EPDS mean score increased from 6.62 ± 3.55 to 7.90 ± 4.65 without any intervention (p = 0.002). The results indicate that telecounseling is an effective method for reducing the risk of depression among mothers during the postpartum period. It is recommended that healthcare professionals extend their support by providing telecounseling for mothers.


Assuntos
Depressão Pós-Parto , Mães , Humanos , Feminino , Adulto , Depressão Pós-Parto/psicologia , Depressão Pós-Parto/prevenção & controle , Mães/psicologia , Mães/estatística & dados numéricos , Gravidez , Período Pós-Parto/psicologia , Paridade , Inquéritos e Questionários
5.
Altern Ther Health Med ; 29(7): 46-51, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36399083

RESUMO

Context: Pregnant women may experience distress as a result of physical and psychosocial changes, and this distress affects the development of maternal attachment negatively. During pregnancy care and follow-up, reducing women's pregnancy-related distress and improving maternal attachment are important. Objective: To compare the effects of listening to lullabies and self-selected music in reducing distress and increasing maternal attachment in pregnant women. Design: This study is a randomized controlled trial. It was conducted using power analysis for a type-I error rate of α = 0.05, type-II error rate of ß = 0.20, representative power of 0.64, and effect size of 0.81. Setting: The study took place at a secondary care hospital in a provincial center in Turkey. Participants: The participants were 120 pregnant women who came to the outpatient clinic for pregnancy follow-ups between June 2021 and October 2021. Intervention: The participants were allocated to one of three groups, with 40 women in each. For 30 minutes every day, for two weeks, the lullaby group (LG) only listened to lullaby records at home, and the multi-music group (MG) listened to self-selected music from different records; the control group (CG) did not listen to any music. Outcome Measures: The Prenatal Distress Questionnaire and the Maternal Antenatal Attachment Scale were used to collect data. Results: Prenatal distress levels were lower in the intervention groups than in the CG (P < .01), and they were lower in the MG than in the LG (P < .05). Antenatal attachment levels were higher in the intervention groups than in the CG (P < .01), and they were higher in the LG than in the MG (P < .05). Conclusions: For pregnant women, listening to self-selected music was more effective in reducing distress, whereas listening to lullabies selected by the researcher was more effective in increasing attachment. ClinicalTrials.gov ID number: NCT05228392.


Assuntos
Musicoterapia , Música , Feminino , Gravidez , Humanos , Gestantes/psicologia , Música/psicologia , Cuidado Pré-Natal , Inquéritos e Questionários
6.
Neurol Sci ; 43(4): 2263-2269, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35061136

RESUMO

BACKGROUND: The coronavirus outbreak, which emerged in Wuhan, China, in late 2019 and spread to the world, has changed each of our lives. OBJECTIVE: To investigate the effects of quarantine on depression, anxiety, sleep quality, fatigue, and SF-36 of multiple sclerosis (MS) patients during the COVID-19 outbreak and differences between healthy controls (HC). METHODS: Eighty-six MS patients and 65 HC patients were included in the study. Participants filled out the various scales through face-to-face interviews for mental health assessment from January 15 to February 15, 2021. RESULTS: When both groups were compared in terms of BECK-D inventory (p < 0.001), BECK-A inventory (p = 0.010), and FS (p < 0.001), the patient group had significantly higher results. Physical functioning (p < 0.001), physical role limitation (p = 0.001), energy vitality rates (p = 0.010), and general health perception (p < 0.001) were higher in the HC group. When MS patients were divided according to EDSS scores, BECK-A (p < 0.001), BECK-D (p = 0.001), and PSQI (p = 0.006) scores of the patients with EDSS > 3 were higher, while emotional role restriction rates (p = 0.006), energy and vitality (p = 0.018), and pain (p = 0.005) were significantly lower than those with EDSS ≤ 3. When MS patients were divided into two groups as who had COVID-19 and who did not and compared SF-36 subscale scores, pain, (p = 0.049) and mental status (p = 0.030) were obtained significant differences in the two groups. CONCLUSIONS: Our study revealed that MS patients, who are more susceptible to the new 'normal' that emerged during the pandemic period, are among the priority groups that should be supported in terms of mental health as well as physical health.


Assuntos
COVID-19 , Esclerose Múltipla , Depressão/epidemiologia , Depressão/psicologia , Humanos , Saúde Mental , Esclerose Múltipla/epidemiologia , Esclerose Múltipla/psicologia , Pandemias , Qualidade de Vida/psicologia , Quarentena/psicologia , SARS-CoV-2
7.
Int J Neurosci ; : 1-4, 2022 Jul 13.
Artigo em Inglês | MEDLINE | ID: mdl-35791090

RESUMO

INTRODUCTION: There is limited data about the neurological effects of Covid-19 in infected patients. In this report, we present 2 LETM cases that are possibly associated with Covid-19 infection. METHODS: Here, we present 2 cases that subsequently developed LETM following Covid-19 infection. The first case presented a finding of tetraparesis prominent in the lower extremities that started ten days after the Covid-19 infection. The second patient was admitted with paraparesis and urinary-stool retention on the 12th day from the onset of symptoms of Covid-19 infection. RESULTS: In these 2 cases, LETM developing following Covid'19 infection was associated with Covid-19 infection. Although Covid-19 PCR was negative in the CSF of both patients, the Covid-19 PCR test was positive in the samples taken from the oropharynx. CONCLUSION: The mechanism of LETM caused by Covid-19 infection is not clearly known. However, both direct infection of the spinal cord and excessive inflammatory response to primary Covid-19 infection may cause spinal cord damage. Therefore, possible Covid-19-associated myelitis should be kept in mind in cases of long segment transverse myelitis grouped under the title of NMOSD and without any etiological factor.

8.
J Biol Chem ; 294(16): 6621-6634, 2019 04 19.
Artigo em Inglês | MEDLINE | ID: mdl-30792308

RESUMO

Nuclear localization of androgen receptor (AR) directs transcriptional regulation of a host of genes, referred to as genomic signaling. Additionally, nonnuclear or nongenomic activities of the AR have long been described, but understanding of these activities remains elusive. Here, we report that AR is imported into and localizes to mitochondria and has a novel role in regulating multiple mitochondrial processes. Employing complementary experimental approaches of AR knockdown in AR-expressing cells and ectopic AR expression in AR-deficient cells, we demonstrate an inverse relationship between AR expression and mitochondrial DNA (mtDNA) content and transcription factor A, mitochondrial (TFAM), a regulator of mtDNA content. We show that AR localizes to mitochondria in prostate tissues and cell lines and is imported into mitochondria in vitro We also found that AR contains a 36-amino-acid-long mitochondrial localization sequence (MLS) capable of targeting a passenger protein (GFP) to the mitochondria and that deletion of the MLS abolishes the import of AR into the mitochondria. Ectopic AR expression reduced the expression of oxidative phosphorylation (OXPHOS) subunits. Interestingly, AR also controlled translation of mtDNA-encoded genes by regulating expression of multiple nuclear DNA-encoded mitochondrial ribosomal proteins. Consistent with these observations, OXPHOS supercomplexes were destabilized, and OXPHOS enzymatic activities were reduced in AR-expressing cells and restored upon AR knockdown. Moreover, mitochondrial impairment induced AR expression and increased its translocation into mitochondria. We conclude that AR localizes to mitochondria, where it controls multiple mitochondrial functions and mitonuclear communication. Our studies also suggest that mitochondria are novel players in nongenomic activities of AR.


Assuntos
Mitocôndrias/metabolismo , Fosforilação Oxidativa , Sinais Direcionadores de Proteínas , Receptores Androgênicos/metabolismo , Proteínas de Ligação a DNA/genética , Proteínas de Ligação a DNA/metabolismo , Técnicas de Silenciamento de Genes , Humanos , Mitocôndrias/genética , Proteínas Mitocondriais/genética , Proteínas Mitocondriais/metabolismo , Células PC-3 , Transporte Proteico/genética , Receptores Androgênicos/genética , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo
9.
J Musculoskelet Neuronal Interact ; 19(4): 412-421, 2019 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-31789292

RESUMO

OBJECTIVES: Eccentric contraction occurs when the muscle lengthens under tension. Damage-induced responses seen in the muscle after eccentric exercise usually experienced by sedentary individuals. This study aims to investigate muscle damage on different slopes. METHODS: 32 male Wistar albino rats randomly divided into four groups: sedentary, horizontal running, and eccentric exercise (-8°, -16°) groups. Animals ran for 90 min with the speed of 25 m/s for five days. After 48h from the last exercise, rats were sacrificed, and plasma creatine kinase (CK), heat shock protein 70 (HSP70) levels were examined. Plasma and soleus total oxidant/antioxidant status (TOS-TAS) and histological changes of soleus muscle assessed. RESULTS: CK and HSP70 significantly increased in 16° EE group. TOS increased at 16° EE and 8° EE, but oxidative stress index (OSI) was only high at 8° EE group. Mononuclear cell infiltration and the angiogenesis increased in soleus after eccentric exercise, and there was a correlation with slope. Sarcomere breaks were detected in 16° EE group also in a correlation with slope. CONCLUSIONS: Consequently, sedentary individuals are vulnerable to injuries induced by eccentric contraction. Therefore, our study provides information for reconsidering rehabilitation and training programs.


Assuntos
Músculo Esquelético/fisiologia , Condicionamento Físico Animal/fisiologia , Corrida/fisiologia , Animais , Creatina Quinase/sangue , Proteínas de Choque Térmico HSP72/sangue , Masculino , Contração Muscular , Oxirredução , Ratos , Ratos Wistar
10.
J Fluoresc ; 28(6): 1393-1404, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30343360

RESUMO

The evaluation of cell wellness is an important task for molecular biology research. This mainly comprises the assessment for morphology and viability of culturing cells. Annexin V-Propidium iodide counterstaining has been currently one of the common and easy methods to discriminate apoptotic and necrotic cell profiles. The method is operated by fluorescence-based detection of counterstain via laser beam-employed instruments including flow cytometer, fluorescence microscope and automated cell counter. The detection is primarily conducted based on the same principle; however the efficiency of instruments may vary. Here we evaluated the efficiency of those instruments for the clear-cut detection of cell death through various mammalian and microalgae cell lines. To the best of our knowledge, this is the first study revealing comparative analyses of apoptotic and necrotic cells in mammalian and microalgae cells using Annexin V-PI counterstain detected by flow cytometer, fluorescence microscope and automated cell counter. Fluorescence microscope and cell counter instruments were also tested and compared for the traditional trypan blue-based cell viability detection performance. For these, cell death was induced by UV-irradiation and/or bee venom for mammalian (pancreatic cancer, metastatic breast cancer and mouse fibroblasts) and microalgae cells (Chlorella vulgaris), respectfully. Findings postulated that automated cell counter and fluorescence microscopy revealed similar patterns for the detection by both counterstain and trypan blue in mammalian cells. Interestingly, flow cytometry did provide an accurate and significant detection for only one mammalian cell line when UV-treatment was followed by routine Annexin V-Propidium iodide counterstaining. Unlike, only flow cytometry revealed a significant change in the detection of death of microalgae cells by Annexin V-Propidium iodide method, but both Annexin and conventional trypan blue methods were not applicable for the automated cell counter and microscopic detections for microalgae cells. The related outputs propose that the obtaining reliable quantitation strongly depends on cell type and instruments used. These suggest the necessity of optimization and validation endeavors before any cell death detection initiative. The analytical outcomes present insights into detailed assessment of cell death detection of eukaryotic cells and provide a direction to researchers to consider.


Assuntos
Anexina A5/metabolismo , Contagem de Células/métodos , Morte Celular , Citometria de Fluxo , Microalgas/citologia , Microscopia de Fluorescência , Propídio/metabolismo , Linhagem Celular Tumoral , Humanos
11.
Biochim Biophys Acta Gen Subj ; 1861(3): 533-540, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27940153

RESUMO

BACKGROUND: Mitochondrial translation machinery solely exists for the synthesis of 13 mitochondrially-encoded subunits of the oxidative phosphorylation (OXPHOS) complexes in mammals. Therefore, it plays a critical role in mitochondrial energy production. However, regulation of the mitochondrial translation machinery is still poorly understood. In comprehensive proteomics studies with normal and diseased tissues and cell lines, we and others have found the majority of mitochondrial ribosomal proteins (MRPs) to be phosphorylated. Neither the kinases for these phosphorylation events nor their specific roles in mitochondrial translation are known. METHODS: Mitochondrial kinases are responsible for phosphorylation of MRPs enriched from bovine mitoplasts by strong cation-exchange chromatography and identified by mass spectrometry-based proteomics analyses of kinase rich fractions. Phosphorylation of recombinant MRPs and 55S ribosomes was assessed by in vitro phosphorylation assays using the kinase-rich fractions. The effect of identified kinase on OXPHOS and mitochondrial translation was assessed by various cell biological and immunoblotting approaches. RESULTS: Here, we provide the first evidence for the association of Fyn kinase, a Src family kinase, with mitochondrial translation components and its involvement in phosphorylation of 55S ribosomal proteins in vitro. Modulation of Fyn expression in human cell lines has provided a link between mitochondrial translation and energy metabolism, which was evident by the changes in 13 mitochondrially encoded subunits of OXPHOS complexes. CONCLUSIONS AND GENERAL SIGNIFICANCE: Our findings suggest that Fyn kinase is part of a complex mechanism that regulates protein synthesis and OXPHOS possibly by tyrosine phosphorylation of translation components in mammalian mitochondria.


Assuntos
Mamíferos/metabolismo , Mamíferos/fisiologia , Mitocôndrias/metabolismo , Mitocôndrias/fisiologia , Proteínas Mitocondriais/metabolismo , Biossíntese de Proteínas/fisiologia , Proteínas Proto-Oncogênicas c-fyn/metabolismo , Animais , Bovinos , Linhagem Celular , Linhagem Celular Tumoral , Células HEK293 , Células Hep G2 , Humanos , Immunoblotting/métodos , Ribossomos Mitocondriais/metabolismo , Ribossomos Mitocondriais/fisiologia , Fosforilação Oxidativa , Fosforilação/fisiologia , Proteômica/métodos , Proteínas Ribossômicas/metabolismo
12.
Ann Plast Surg ; 74(6): 684-92, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24317243

RESUMO

BACKGROUND: Propolis and curcumin have antioxidant, anti-inflammatory, immunomodulatory, and neuroprotective features. The goal of this study was to determine the effects of propolis and curcumin on nerve healing in rat sciatic nerve crush injuries and to compare these effects with results obtained using steroid treatment. METHODS: In the sham group, the right sciatic nerves of rats were dissected and exposed, and the skin was closed without any additional manipulation. In the control group (group C), after the right sciatic nerves of rats were exposed, crush damage was inflicted using a surgical clamp. In the control-methylprednisolone group, crush injuries were inflicted on sciatic nerves as in group C. After injury, 1-mg/kg methylprednisolone was administered daily for 6 days and was then tapered for 4 days. In the curcumin group, crush injuries were inflicted on sciatic nerves as in group C. Then, 100-mg/kg curcumin was given every day. In the propolis group, crush injuries were inflicted on sciatic nerves as in group C. Then, 200-mg/kg propolis was given every day. Rats were evaluated after 28 days using functional (walking track analysis and electrophysiological measurements), histomorphometric, electron microscopic, and muscle weight measurements. RESULTS: Compared to the control groups, the curcumin and propolis groups had better functional (walking track analysis and electrophysiological) results after experimental peripheral nerve crush injury. CONCLUSIONS: Curcumin and propolis, 2 traditional drugs, had a positive effect on nerve crush injuries. We are convinced that they can be used to support routine treatment in such nerve injuries.


Assuntos
Anti-Inflamatórios/uso terapêutico , Curcumina/uso terapêutico , Metilprednisolona/uso terapêutico , Traumatismos dos Nervos Periféricos/tratamento farmacológico , Própole/uso terapêutico , Nervo Isquiático/lesões , Animais , Anti-Inflamatórios/farmacologia , Curcumina/farmacologia , Esquema de Medicação , Feminino , Metilprednisolona/farmacologia , Própole/farmacologia , Distribuição Aleatória , Ratos , Ratos Wistar , Recuperação de Função Fisiológica/efeitos dos fármacos , Nervo Isquiático/efeitos dos fármacos , Cicatrização/efeitos dos fármacos
13.
J Stroke Cerebrovasc Dis ; 24(1): 83-90, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25440351

RESUMO

OBJECTIVES: The aim of this study is to investigate the potential effects of borax on ischemia/reperfusion injury of the rat spinal cord. METHODS: Twenty-one Wistar albino rats were divided into 3 groups: sham (no ischemia/reperfusion), ischemia/reperfusion, and borax (ischemia/reperfusion + borax); each group was consist of 7 animals. Infrarenal aortic cross clamp was applied for 30 minutes to generate spinal cord ischemia. Animals were evaluated functionally with the Basso, Beattie, and Bresnahan scoring system and inclined-plane test. The spinal cord tissue samples were harvested to analyze tissue concentrations of nitric oxide, nitric oxide synthase activity, xanthine oxidase activity, total antioxidant capacity, and total oxidant status and to perform histopathological examination. RESULTS: At the 72nd hour after ischemia, the borax group had significantly higher Basso, Beattie, and Bresnahan and inclined-plane scores than those of ischemia/reperfusion group. Histopathological examination of spinal cord tissues in borax group showed that treatment with borax significantly reduced the degree of spinal cord edema, inflammation, and tissue injury disclosed by light microscopy. Xanthine oxidase activity and total oxidant status levels of the ischemia/reperfusion group were significantly higher than those of the sham and borax groups (P < .05), and total antioxidant capacity levels of borax group were significantly higher than those of the ischemia/reperfusion group (P < .05). There was not a significantly difference between the sham and borax groups in terms of total antioxidant capacity levels (P > .05). The nitric oxide levels and nitric oxide synthase activity of all groups were similar (P > .05). CONCLUSIONS: Borax treatment seems to protect the spinal cord against injury in a rat ischemia/reperfusion model and improve neurological outcome.


Assuntos
Boratos/uso terapêutico , Doenças do Sistema Nervoso/etiologia , Doenças do Sistema Nervoso/prevenção & controle , Fármacos Neuroprotetores/uso terapêutico , Estresse Oxidativo/efeitos dos fármacos , Traumatismo por Reperfusão/complicações , Isquemia do Cordão Espinal/etiologia , Isquemia do Cordão Espinal/prevenção & controle , Animais , Antioxidantes/metabolismo , Locomoção/efeitos dos fármacos , Masculino , Doenças do Sistema Nervoso/patologia , Óxido Nítrico/metabolismo , Ratos , Ratos Sprague-Dawley , Traumatismo por Reperfusão/patologia , Isquemia do Cordão Espinal/patologia , Xantina Oxidase/metabolismo
14.
Noise Health ; 17(74): 11-6, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25599753

RESUMO

Noise, one of the main components of modern society, has become an important environmental problem. Noise is not only an irritating sound, but also a stress factor leading to serious health problems. In this study, we have investigated possible effects of rosuvastatin, a 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitor, thought to have an antioxidant effect, on noise-induced oxidative stress in the serum of rat models. Thirty-two male Wistar albino rats were used. In order to ease their adaptation, 2 weeks before the experiment, the rats were divided into four groups (with eight rats per each group): Noise exposure plus rosuvastatin usage, only noise exposure, only rosuvastatin usage and control. After the data had been collected, oxidant (Malondialdehyde, nitric oxide [NO], protein carbonyl [PC]) and antioxidant (superoxide dismutase [SOD], glutathione peroxidase [GSH-PX], catalase [CAT]) parameters were analyzed in the serum. Results indicated that SOD values were found to be significantly lower, while PC values in serum were remarkably higher in the group that was exposed to only noise. GSH-Px values in serum dramatically increased in the group on which only rosuvastatin was used. During noise exposure, the use of rosuvastatin caused significantly increased CAT values, whereas it resulted in reduced PC and NO values in serum. In conclusion, our data show that noise exposure leads to oxidative stress in rat serum; however, rosuvastatin therapy decreases the oxidative stress caused by noise exposure.


Assuntos
Antioxidantes/farmacologia , Fluorbenzenos/farmacologia , Inibidores de Hidroximetilglutaril-CoA Redutases/farmacologia , Ruído/efeitos adversos , Oxidantes/sangue , Estresse Oxidativo/efeitos dos fármacos , Pirimidinas/farmacologia , Sulfonamidas/farmacologia , Animais , Antioxidantes/análise , Masculino , Estresse Oxidativo/fisiologia , Distribuição Aleatória , Ratos , Ratos Wistar , Rosuvastatina Cálcica
15.
Biochem Biophys Res Commun ; 450(1): 802-7, 2014 Jul 18.
Artigo em Inglês | MEDLINE | ID: mdl-24952159

RESUMO

Post-translational modifications (PTMs) of histones such as phosphorylation, acetylation, and ubiquitination, collectively referred to as the "histone-code", have been known to regulate gene expression and chromatin condensation for over a decade. They are also implicated in processes such as DNA repair and apoptosis. However, the study of the phosphorylation of histones has been mainly focused on chromosome condensation and mitosis. Therefore, the phosphorylation of histones in apoptosis is not fully understood. It was recently demonstrated by Tang et al. that histones are released from nucleosome during apoptosis, an observation that is in agreement with our findings. In addition to the release of histones, the dephosphorylation of histone H3 at Thr-3 and Ser-10 was observed during apoptosis in some cancer cells. Our data suggest that the modification and release of histones could serve markers of apoptosis in human cancer cells. We also suggest that the released histones, especially H3, could be translocated to mitochondria during apoptosis.


Assuntos
Apoptose/fisiologia , Histonas/metabolismo , Mitocôndrias/metabolismo , Processamento de Proteína Pós-Traducional/fisiologia , Estaurosporina/farmacologia , Apoptose/efeitos dos fármacos , Inibidores Enzimáticos/farmacologia , Humanos , Células Jurkat , Mitocôndrias/efeitos dos fármacos , Processamento de Proteína Pós-Traducional/efeitos dos fármacos
16.
Neurol Sci ; 35(11): 1807-12, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24906297

RESUMO

Varenicline is a new drug for smoking cessation, and its effect on epilepsy is not clear. The aim of this study was to investigate whether different doses of varenicline cause epileptic activity. Forty rats were randomly assigned to the following eight groups: control, saline, and 0.025, 0.04, 0.1, 0.5, 1, and 2 mg kg(-1) varenicline (single dose, i.p.). EEGs were recorded before the varenicline injection and during the following 240 min. While epileptic discharges were observed on the EEGs of the rats in all of the varenicline-treated groups, motor findings of epileptic seizure were not observed in some rats in these groups except the 1 and 2 mg kg(-1) groups. These findings indicate that different single doses of varenicline cause epileptic activity in rats.


Assuntos
Benzazepinas/toxicidade , Encéfalo/efeitos dos fármacos , Epilepsia/induzido quimicamente , Agonistas Nicotínicos/toxicidade , Quinoxalinas/toxicidade , Convulsões/induzido quimicamente , Animais , Benzazepinas/administração & dosagem , Relação Dose-Resposta a Droga , Eletroencefalografia , Masculino , Agonistas Nicotínicos/administração & dosagem , Quinoxalinas/administração & dosagem , Ratos , Ratos Wistar , Vareniclina
17.
Proc Natl Acad Sci U S A ; 108(44): 17921-6, 2011 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-22003127

RESUMO

Basal transcription of human mitochondrial DNA (mtDNA) in vitro requires the single-subunit, bacteriophage-related RNA polymerase, POLRMT, and transcription factor h-mtTFB2. This two-component system is activated differentially at mtDNA promoters by human mitochondrial transcription factor A (h-mtTFA). Mitochondrial ribosomal protein L7/L12 (MRPL12) binds directly to POLRMT, but whether it does so in the context of the ribosome or as a "free" protein in the matrix is unknown. Furthermore, existing evidence that MRPL12 activates mitochondrial transcription derives from overexpression studies in cultured cells and transcription experiments using crude mitochondrial lysates, precluding direct effects of MRPL12 on transcription to be assigned. Here, we report that depletion of MRPL12 from HeLa cells by shRNA results in decreased steady-state levels of mitochondrial transcripts, which are not accounted for by changes in RNA stability. We also show that a significant "free" pool of MRPL12 exists in human mitochondria not associated with ribosomes. "Free" MRPL12 binds selectively to POLRMT in vivo in a complex distinct from those containing h-mtTFB2. Finally, using a fully recombinant mitochondrial transcription system, we demonstrate that MRPL12 stimulates promoter-dependent and promoter-independent transcription directly in vitro. Based on these results, we propose that, when not associated with ribosomes, MRPL12 has a second function in transcription, perhaps acting to facilitate the transition from initiation to elongation. We speculate that this is one mechanism to coordinate mitochondrial ribosome biogenesis and transcription in human mitochondria, where transcription of rRNAs from the mtDNA presumably needs to be adjusted in accordance with the rate of import and assembly of the nucleus-encoded MRPs into ribosomes.


Assuntos
RNA Polimerases Dirigidas por DNA/metabolismo , Mitocôndrias/enzimologia , Proteínas Ribossômicas/metabolismo , Transcrição Gênica , Células HeLa , Humanos , Reação em Cadeia da Polimerase em Tempo Real
18.
Noise Health ; 16(68): 18-25, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24583676

RESUMO

The problem of noise has recently gained more attention as it has become an integral part of our daily lives. However, its influence has yet to be fully elucidated. Other than being an unpleasant stimulus, noise may cause health disorders through annoyance and stress, including oxidative stress. Rosuvastatin, a 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor, may possess antioxidant properties. Based on rat models, our project investigates the effect of rosuvastatin on noise-induced oxidative stress in the brain tissue. Thirty-two male Wistar albino rats were used. The rats were divided into four groups: Noise exposure plus rosuvastatin usage, only noise exposure, only rosuvastatin usage, and control. After the data had been collected, oxidant and antioxidant parameters were analyzed in the cerebral cortex, brain stem, and cerebellum. Results indicated that superoxide dismutase values were significantly decreased in the cerebral cortex, while malondialdehyde values in the brainstem and cerebellum were significantly increased in the group with only noise exposure. Superoxide dismutase values in the brainstem were significantly increased, but nitric oxide values in the cerebellum and brainstem and malondialdehyde values in the cerebellum and cerebral cortex were significantly decreased in the group where only rosuvastatin was used. During noise exposure, the use of rosuvastatin caused significantly increased superoxide dismutase values in the cerebral cortex and brainstem, but significantly reduced malondialdehyde values in the brain stem. Consequently, our data show that brain tissue was affected by oxidative stress due to continued exposure to noise. This noise-induced stress decreases with rosuvastatin therapy.


Assuntos
Antioxidantes/farmacologia , Encéfalo/efeitos dos fármacos , Encéfalo/efeitos da radiação , Fluorbenzenos/farmacologia , Ruído/efeitos adversos , Estresse Oxidativo/efeitos dos fármacos , Estresse Oxidativo/efeitos da radiação , Pirimidinas/farmacologia , Sulfonamidas/farmacologia , Análise de Variância , Animais , Encéfalo/metabolismo , Masculino , Especificidade de Órgãos , Estresse Oxidativo/fisiologia , Distribuição Aleatória , Ratos , Ratos Wistar , Rosuvastatina Cálcica
19.
Heliyon ; 10(5): e26900, 2024 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-38444472

RESUMO

Background: Alemtuzumab (ATZ) is an anti-CD52 humanized monoclonal antibody indicated for treating highly active relapsing-remitting MS (RRMS). It alters the regulation of the immune system by depleting circulating lymphocytes. Changes in blood cell count, infusion-related reactions, and changes in vital parameters can be seen in the early period with ATZ. Aim: Changes in blood tests, serum tests, vital parameters, and characteristics of infusion-associated reactions (IARs) observed during the first course of ATZ treatment and thereafter were evaluated. Materials and methods: The systolic blood pressure (SBP), diastolic blood pressure (DBP), fever, heart rate (HR), changes in blood and serum tests, and IARs developed after the first course of 23 patients with RRMS who received ATZ treatment were evaluated by comparing the results of 26 patients with RRMS who received only intravenous methylprednisolone. Results: Mean age was 36.60 ± 8.98, 73.9% female (n = 17), diagnosis time was 8.52 ± 3.64 years, pre-EDSS: 3.93 ± 1.80. No significant difference was found in vital parameters except for sub-febrile fever that developed on the first day. The number of white blood cells increased significantly after the first day. The hemoglobin level did not change. Lymphocyte (very high) and platelet (mild) counts decreased starting from the first days, and eosinophil (very high) and monocyte (moderate) counts decreased from the third day. There were no significant changes in liver enzymes, thyroid function tests, serum urea, creatinine, and lipid profile during 1-year follow-up. The IAR rate was 95.6% and occurred most frequently on the second and third days. The most common are dermatological findings (52%), headache (20%), pain (10%) and fatigue (8%). Conclusion: Alemtuzumab has no appreciable effect on vital parameters during infusion. However, these changes are not clinically correlated, even if there is. Headache in the first days, dermatological (most common) findings, pain, and fatigue are seen in the following days. Most IARs can be resolved with symptomatic treatment and close follow-up. Lymphocytes, eosinophils, and monocytes are significantly reduced and return to baseline levels towards the end of the first year. The first year does not cause significant pathologies in other serum parameters. However, after the first year, watch out for associated autoimmune pathologies, especially thyroid involvement.

20.
Neurologist ; 29(3): 152-157, 2024 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-38251750

RESUMO

OBJECTIVES: Cerebral venous sinus thrombosis (CVST) is a cerebrovascular disease characterized by thrombosis of the cerebral venous or dural sinuses. Autoimmune diseases (AD) are important causes of CVST. This study aims to reveal the differences between CVST associated with autoimmune diseases compared with other causes (OCs) and Behcet's syndrome (BS) compared with other ADs. METHODS: This is a single-center retrospective study in which the medical records of 187 patients we followed with a diagnosis of CVST between 2008 and 2023 were collected retrospectively. Four neurologists collected data on initial symptoms, neurological examinations, and laboratory findings. Findings on magnetic resonance imaging and magnetic resonance venography performed on all patients (thrombosis localizations, hemorrhagic or ischemic complications, and collateralization) were re-evaluated by 2 radiologists. The results were compared with AD, other ADs, and OCs groups. RESULTS: There were 28 cases of CVST associated with AD. Of these, 18 were BS, and 10 were other AD. Subacute-chronic onset, headache, and transverse sinus involvement were more common in AD-related patients than in OCs. However, collateralization, venous infarction, hemorrhagic transformation, and bleeding were less common. BS-related patients had earlier age, more frequent transverse sinus, less frequent cortical vein thrombosis, and better collateralization than other ADs. CONCLUSION: CVST is one of the rare complications in autoimmune diseases. It has a more subacute-chronic onset. Since headaches are more common, it is essential to make a differential diagnosis of CVST in autoimmune diseases with chronic headaches. Transverse sinus thrombosis is more common. Collateralization, venous infarction, and hemorrhagic transformation are less.


Assuntos
Doenças Autoimunes , Trombose dos Seios Intracranianos , Humanos , Trombose dos Seios Intracranianos/diagnóstico por imagem , Trombose dos Seios Intracranianos/complicações , Masculino , Feminino , Estudos Retrospectivos , Adulto , Doenças Autoimunes/complicações , Pessoa de Meia-Idade , Adulto Jovem , Síndrome de Behçet/complicações , Síndrome de Behçet/diagnóstico por imagem , Adolescente , Imageamento por Ressonância Magnética , Idoso , Angiografia por Ressonância Magnética
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA