Trans-spinal magnetic stimulation combined with kinesiotherapy as a new method for enhancing functional recovery in patients with spinal cord injury due to neuromyelitis optica: a case report.

BACKGROUND: Experimental studies have shown that repetitive trans-spinal magnetic stimulation (TsMS) decreases demyelination and enables recovery after spinal cord injury (SCI). However, the usefulness of TsMS in humans with SCI remains unclear. Therefore, the main objective of this study is to evaluate the effects of TsMS combined with kinesiotherapy on SCI symptoms. We describe a protocol treatment with TsMS and kinesiotherapy in a patient with SCI due to neuromyelitis optica (NMO)-associated transverse myelitis. CASE PRESENTATION: A 23-year-old white male with NMO spectrum disorders started symptoms in 2014 and included lumbar pain evolving into a mild loss of strength and sensitivity in both lower limbs. Five months later, the symptoms improved spontaneously, and there were no sensorimotor deficits. Two years later, in 2016, the symptoms recurred with a total loss of strength and sensitivity in both lower limbs. Initially, physiotherapy was provided in 15 sessions with goals of motor-sensory recovery and improving balance and functional mobility. Subsequently, TsMS (10 Hz, 600 pulses, 20-seconds inter-trains interval, at 90% of resting motor threshold of the paravertebral muscle) was applied at the 10th thoracic vertebral spinous process before physiotherapy in 12 sessions. Outcomes were assessed at three time points: prior to physiotherapy alone (T-1), before the first session of TsMS combined with kinesiotherapy (T0), and after 12 sessions of TsMS combined with kinesiotherapy (T1). The patient showed a 25% improvement in walking independence, a 125% improvement in balance, and an 18.8% improvement in functional mobility. The Patient Global Impression of Change Scale assessed the patient's global impression of change as 'much improved'. CONCLUSION: TsMS combined with kinesiotherapy may safely and effectively improve balance, walking independence, and functional mobility of patients with SCI due to NMO-associated transverse myelitis.

Trans-Spinal Theta Burst Magnetic Stimulation in Parkinson's Disease and Gait Disorders.

BACKGROUND: Gait disorders in patients with Parkinson's disease (PD) can become disabling with disease progression without effective treatment. OBJECTIVES: To investigate the efficacy of intermittent θ burst trans-spinal magnetic stimulation (TsMS) in PD patients with gait and balance disorders. METHODS: This was a randomized, parallel, double-blind, controlled trial. Active or sham TsMS was applied at third thoracic vertebra with 100% of the trans-spinal motor threshold, during 5 consecutive days. Participants were evaluated at baseline, immediately after last session, 1 and 4 weeks after last session. Primary outcome was Total Timed Up and Go (TUG) values comparing active versus sham phases 1 week after intervention. The secondary outcome measurements consisted of motor, gait and balance scales, and questionnaires for quality of life and cognition. RESULTS: Thirty-three patients were included, average age 68.5 (6.4) years in active group and 70.3 (6.3) years in sham group. In active group, Total TUG mean baseline was 107.18 (95% CI, 52.1-116.1), and 1 week after stimulation was 93.0 (95% CI, 50.7-135.3); sham group, Total TUG mean baseline was 101.2 (95% CI, 47.1-155.3) and 1 week after stimulation 75.2 (95% CI 34.0-116.4), P = 0.54. Similarly, intervention had no significant effects on secondary outcome measurements. During stimulation period, five patients presented with mild side effects (three in active group and two in sham group). DISCUSSION: TsMS did not significantly improve gait or balance analysis in patients with PD and gait disorders. The protocol was safe and well tolerated. © 2024 International Parkinson and Movement Disorder Society.

Intervención fisioterapéutica en fibromialgia / Physiotherapeutic intervention in fibromyalgia

Introducción: La fibromialgia afecta el movimiento corporal. Provoca dolor en puntos claves, causa molestias musculoesqueléticas y limita la actividad de las personas. Se ha descrito que la fisioterapia mejora de calidad de vida de estos pacientes. Objetivo: Identificar los test de evaluación y los procesos de intervención fisioterapéutica utilizados en la fibromialgia. Métodos: Se realizó una revisión de literatura en PubMed, ScientsDirect, SciELO y LILLACS, con la terminología MeSH y DeCS, entre 2017 y 2022. Resultados: La escala visual análoga y la algometría por presión son los test utilizados para el dolor. La hidroterapia, el cupping, la punción seca, el masaje sueco, los ejercicios respiratorios y los aeróbicos resultan los métodos de intervención con más uso. Conclusiones: Los procesos de intervención se deben plantear según las evaluaciones del dolor y la funcionalidad en la persona. El tratamiento fisioterapéutico de la fibromialgia debe tener un componente de ejercicio físico aérobico y fuerza para disminuir la fatiga; devolverle al músculo su funcionalidad y aumentar la capacidad aeróbica(AU)

Introduction: Fibromyalgia affects body movement. It causes pain in key points, it causes musculoskeletal discomfort and it limits the persons's activity. It has been described that physiotherapy improves the quality of life of these patients. Objective: To identify the evaluation tests and physiotherapy intervention processes used in fibromyalgia. Methods: A literature review was carried out in PubMed, ScientsDirect, Scielo and LILLACS, with the terminology MeSH and DeCS, from 2017 to 2022. Results: The visual analogue scale and pressure algometry are the tests used for pain. Hydrotherapy, cupping, dry needling, Swedish massage, breathing exercises and aerobics are the most commonly used intervention methods. Conclusions: Intervention processes should be planned according to the evaluations of pain and functionality in the person. The physiotherapy treatment of fibromyalgia must have a component of aerobic physical exercise and strength to reduce fatigue, to return the muscle to its functionality and increase aerobic capacity(AU)

Electromagnetic field for supramaximal muscle stimulation: A retrospective study of safety, efficacy, and patient satisfaction in Brazil.

BACKGROUND: Currently, even individuals who do physical activity regularly have some degree of dissatisfaction with their own bodies. The electromagnetic field for supramaximal muscle contraction has been the subject of research. High-intensity supramaximal muscle stimulation (HI-SMS) is a non-invasive technology used to strengthen, firm, and tone the abdominal muscles, arms, buttocks, and thighs and has been indicated for aesthetic purposes. AIMS: The present study aimed to examine the safety and efficacy of HI-SMS used in the abdominal muscles of patients through the analysis of clinical evaluation, biochemical serum profile, and patient satisfaction with the procedure. PATIENTS/METHODS: This is retrospective non-randomized and non-controlled study collected in a private clinic; all data from healthy participants (n = 25), aged between 18 and 55 years, were compiled and analyzed. All received eight 30 min sessions of electromagnetic field ONIX HI-SMS (intensity of the 90%-100%) located in abdominal, twice a week with intervals of 2-3 days. RESULTS: The results show that BMI, fat thickness, and waist circumference improved the body contour after the treatment. There was no statistical difference in the data referring to the values of AST, ALT, ALP, creatinine, cholesterol, LDL-C, VLDL-C, HDL-C, glycemia, LDH, CK, and IL-6. However, there was a reduction of "non-esterified" free fatty acids when compared to baseline. This treatment provided high levels of tolerance, comfort, and high level of satisfaction. CONCLUSIONS: Thus, it can be suggested that the treatment with HI-SMS in abdominal muscles proves to be a safe technology with potential for non-invasive therapy for aesthetic purposes.

Effects of central intermittent theta-burst stimulation combined with repetitive peripheral magnetic stimulation on upper limb function in stroke patients.

Background: Intermittent theta-burst stimulation and repetitive peripheral magnetic stimulation can improve motor function in poststroke patients, but the therapeutic effect of this combination remains unclear. Objective: To determine the effects of central intermittent theta-burst stimulation and repetitive peripheral magnetic stimulation on upper limb function. Methods: Fifty-six subacute stroke patients were randomly assigned to three groups: the CMS (n = 18), peripheral magnetic stimulation (PMS) (n = 19) and CPS (n = 19) groups. The CMS group received intermittent theta-burst stimulation and peripheral false stimulation, while the PMS group received repetitive peripheral magnetic stimulation and central false stimulation once a day for five days a week over four weeks. The CPS group received intermittent theta-burst stimulation and repetitive peripheral magnetic stimulation simultaneously once daily for four weeks. The Fugl-Meyer Assessment, Action Research Arm Test, Modified Barthel Index and Modified Ashworth Scale evaluated outcomes before and after four weeks of treatment. Results: The motor function scores of all groups were significantly increased after treatment compared with before treatment, while the Modified Ashworth Scale score showed no significant change. There was a significant difference in the motor function score of the CPS group compared with that of the CMS and PMS groups, but there was no significant improvement in the Modified Ashworth Scale score. Conclusion: Combining the two treatment methods can improve patients' motor function and daily living abilities but cannot improve muscle tone.

Antecedentes: La estimulación intermitente de theta-burst y la estimulación magnética periférica repetitiva pueden mejorar la función motora en pacientes postictus, pero el efecto terapéutico de esta combinación sigue sin estar claro. Objetivo: Determinar el efecto de la estimulacion central intermitente theta-burst y la estimulación magnética repetitiva periférica en la función del miembro superior. Métodos: Se asignaron aleatoriamente a tres grupos 56 pacientes con ictus subagudo: CMS (n = 18), estimulación magnética periferica (PMS) (n = 19) y CPS(Cm1) (n = 19). El grupo CMS recibió estimulación intermitente de theta-burst y falsa estimulación periférica, el grupo PMS recibió estimulación magnética periférica repetitiva y falsa estimulación central una vez al día durante cinco días a la semana a lo largo de cuatro semanas. El grupo SPC recibió estimulación intermitente theta-burst y estimulación magnética periférica repetitiva simultáneamente una vez al día durante cuatro semanas. Se utilizaron la Fugl-Meyer Assessment, Action Research Arm Test, Modified Barthel Index and Modified Ashworth Scale para evaluar losresultados antes y después de cuatro semanas de tratamiento. Resultados: Las puntuaciones de la función motora de todos los grupos aumentaron significativamente después del tratamiento en comparación con antes del tratamiento, mientras que la puntuación de la Escala de Ashworth Modificada no mostró cambios significativos. Hubo una diferencia significativa en la puntuación de la función motora del grupo CPS en comparación con la de los grupos CMS y PMS, pero no hubo una mejora significativa en la puntuación de la Escala de Ashworth Modificada. Conclusiones: La combinación de los dos métodos de tratamiento puede mejorar la función motora y las capacidades de la vida diaria de los pacientes, pero no puede mejorar el tono muscular.

New device for active gastric mechanical stimulation.

BACKGROUND: Gastroparesis is a chronic stomach disorder and effective treatment is the aim of different strategies. Alternative therapies consist of an electrical stimulation of the stomach to evoke a response in the gastric activity. We present the development and in vivo application of an electromagnet system to induce a mechanical stimulus in the stomach aiming for gastric contractile responses. METHODS: The electromagnet system consisted of an implantable magnet and an external drive coil. We implanted the magnet at the greater curvature of the gastric body in rats. We applied an alternating current to the drive coils, inducing mechanical stimulation of the gastric wall. We measured the gastric contraction activity and gastric electrical activity in response to the stimulus using AC biosusceptometry and electrogastrography. Moreover, we used the phenol red to evaluate the stimulus effects on gastrointestinal transit. KEY RESULTS: The stimulus increased the spectral intensity and signal-to-noise ratio significantly of gastric contraction activity and gastric electrical activity. Furthermore, we found a lower phenol red retention in the stomach in rats without stimulus. No significant differences were found in frequency and root mean square amplitude. CONCLUSIONS & INFERENCES: We developed a new simple electromagnet system that evoked a contraction and gastric electrical response using a mechanical stimulus and decreased gastric emptying time. The system is an accessible tool and may contribute to gastroparesis studies in animals.

Efectividad del tratamiento rehabilitador combinado de láser y magneto en pacientes con parálisis facial periférica / Effectiveness of combined laser and magneto rehabilitation treatment in patients with peripheral facial paralysis

La parálisis facial periférica es una afectación neurológica muy frecuente y en la mayor parte de los casos no se llega a establecer una etiología precisa, denominándolas idiopáticas o parálisis facial de Bell. Se realizó el estudio con el objetivo de evaluar la efectividad del tratamiento rehabilitador combinado de láser y magneto en pacientes con parálisis facial periférica. Se realizó un estudio cuasi-experimental modalidad antes y después sin grupo control, en 37 pacientes con parálisis facial periférica que acudieron a Consulta de Fisiatría del Policlínico “Máximo Gómez Báez” del municipio Río Cauto en el período de enero de 2017 a enero de 2019. Se estudió la comorbilidad de la parálisis facial periférica con otras enfermedades crónicas e infecciosas, resultando que el herpes simple y la otitis fueron las más significativas para un 40,54 y 24,32 por ciento respectivamente; no se tuvieron complicaciones durante la terapia combinada en el 83,78 por ciento; el nivel de severidad fue normal (83,78 por ciento), leve (13,51 por ciento) y moderado (2,70 por ciento); el tratamiento fue efectivo en el 83,78 por ciento de los pacientes. Se concluye que el tratamiento rehabilitador combinado de láser y magneto en pacientes con parálisis facial periférica es efectivo(AU)

Peripheral facial paralysis is a very frequent neurological affectation and in most cases it is not possible to establish an accurate etiology, calling them idiopathic or Bell's facial paralysis. The study was conducted with the objective of evaluating the effectiveness of combined laser and magneto rehabilitation treatment in patients with peripheral facial paralysis. We performed a quasi-experimental modality before and after without a control group in 37 patients with peripheral facial paralysis who attended the Physiatry Consultation of the "Máximo Gómez Báez" Polyclinic in the municipality of Río Cauto from January 2017 to January 2019 The comorbidity of peripheral facial paralysis with other chronic and infectious diseases was studied, resulting that herpes simplex and otitis were the most significant for 40,54 and 24,32 percent respectively; there were no complications during the combined therapy in 83,78 percent; the level of severity was normal (83,78 percent), mild (13,51 percent) and moderate (2,70 percent); the treatment was effective in 83,78 percent of the patients. It is concluded that the combined rehabilitation treatment of laser and magneto in patients with peripheral facial paralysis is effective(EU)

Transcutaneous magnetic spinal cord stimulation for freezing of gait in Parkinson's disease.

Dopaminergic drugs partially alleviate gait problems in Parkinson's disease, but the effects are not sustained in the long-term. Particularly, the freezing of gait directly impacts patients' quality of life. Experimental epidural spinal cord stimulation (SCS) studies have suggested positive effects on locomotion among PD patients, but the effects of non-invasive stimulation have never been explored. Here, we investigated in a prospective, open-label, pilot study the efficacy and safety of non-invasive magnetic stimulation of the spinal cord in five patients with PD who experienced gait problems, including freezing of gait. A trial of transcutaneous magnetic SCS was performed at the level of the fifth thoracic vertebra. The primary outcome was the change in freezing of gait 7 days after stimulation. Secondary outcome measures included changes in gait speed and UPDRS part III. After non-invasive spinal cord stimulation, patients experienced a 22% improvement in freezing of gait (p = 0.040) and 17.4% improvement in the UPDRS part III (p = 0.042). Timed up and go times improved by 48.2%, although this did not reach statistical significance (p = 0.06). Patients' global impression of change was 'much improved' for four patients. Improvement in gait after stimulation was reversible, since it returned to baseline scores 4 weeks after stimulation. No severe side effects were recorded. This pilot study suggests that transcutaneous magnetic spinal cord stimulation is feasible and can potentially improve gait problems in PD, without severe adverse effects. Large scale phase II trials are needed to test this hypothesis.

Utilidad de la radiación electromagnética en el síndrome doloroso subcalcáneo / Value of Electromagnetic Radiation in Subcalcaneal Pain Syndrome

RESUMEN Introducción: La causa común de dolor en la región subcalcánea es la fascitis plantar. Por su efecto analgésico y antiinflamatorio, el empleo de la radiación electromagnética en su tratamiento constituye una opción terapéutica. Objetivos: Evaluar la utilidad de la radiación electromagnética en pacientes que presentaban síndrome doloroso en la región subcalcánea y relacionar la mejoría clínica con los grupos de edades y sexos. Métodos: Se realizó un estudio descriptivo de corte transversal a dos grupos de pacientes con dolor en la región subcalcánea. Para el análisis estadístico, al final del tratamiento se utilizó la prueba de homogeneidad λ2 con un nivel de significación de ά 0,05. Resultados: A las 20 sesiones de tratamiento, el 93,33 por ciento de los pacientes tratados con la radiación electromagnética no presentaron dolor, el 94,44 por ciento de ellos pertenecían al grupo de edades de 25-59 años y el 90,90 por ciento eran del sexo femenino. Conclusiones: Se evalúa de positiva la utilidad de la radiación electromagnética en el tratamiento del dolor en la región subcalcánea, con una diferencia significativa en relación con el tratamiento médico convencional. El mayor número de pacientes correspondió al grupo de edades entre 25 y 59 años, con predominio del sexo femenino(AU)

ABSTRACT Introduction: The common cause of pain in the subcalcaneal region is plantar fasciitis. The electromagnetic radiation in its treatment constitutes a therapeutic option due to its analgesic and anti-inflammatory effect. Objectives: To assess the value electromagnetic radiation in patients who suffered pain syndrome in the subcalcaneal region and to relate the clinical improvement with age and gender groups. Methods: A descriptive cross-sectional study was conducted in two groups of patients with pain in the subcalcaneal region. For the statistical analysis, the λ2 homogeneity test was used at the end of the treatment with a significance level of ά 0.05. Results: After a treatment of 20 electromagnetic radiation sessions, 93.33 percent did not had pain, 94.44 percent were in the 25-to-59-year-olds group and 90.90 percent were women. Conclusions: The value of electromagnetic radiation in the treatment of pain in the subcalcaneal region is positively assessed, showing significant difference in relation to conventional medical treatment. The largest number of patients corresponded to the 25-to-59-year-olds group, with a predominance of women(AU)

Effects of photobiomodulation therapy combined to static magnetic field in strength training and detraining in humans: protocol for a randomised placebo-controlled trial.

INTRODUCTION: In recent years, it has been demonstrated that photobiomodulation therapy (PBMT) using low-level laser therapy and/or light-emitting diode therapy combined to static magnetic field (sMF) has ergogenic effects, improving muscular performance and accelerating postexercise recovery. However, many aspects related to these effects and its clinical applicability remain unknown. Therefore, the aim of this project is to evaluate the ergogenic effects of PBMT/sMF in detraining after a strength-training protocol. METHODS AND ANALYSIS: The study will be a randomised, triple-blind, placebo-controlled clinical trial. Healthy male volunteers will be randomly distributed into four experimental groups: PBMT/sMF before training sessions + PBMT/sMF during detraining, PBMT/sMF before training sessions + placebo during detraining, placebo before training sessions + PBMT/sMF during detraining and placebo before training sessions + placebo during detraining. Strength-training sessions will be carried out over 12 weeks, and the detraining period will occur during the 4 weeks after. The muscular strength and the structural properties of quadriceps will be analysed. ETHICS AND DISSEMINATION: This study was approved by the Research Ethics Committee of Nove de Julho University. The results from this study will be disseminated through scientific publications in international peer-reviewed journals and presented at national and international scientific meetings. TRIAL REGISTRATION NUMBER: NCT03858179.

Therapeutic evaluation of magnetic hyperthermia using Fe3O4-aminosilane-coated iron oxide nanoparticles in glioblastoma animal model.

OBJECTIVE: To evaluate the potential of magnetic hyperthermia using aminosilane-coated superparamagnetic iron oxide nanoparticles in glioblastoma tumor model. METHODS: The aminosilane-coated superparamagnetic iron oxide nanoparticles were analyzed as to their stability in aqueous medium and their heating potential through specific absorption rate, when submitted to magnetic hyperthermia with different frequencies and intensities of alternating magnetic field. In magnetic hyperthermia in vitro assays, the C6 cells cultured and transduced with luciferase were analyzed by bioluminescence in the absence/presence of alternating magnetic field, and also with and without aminosilane-coated superparamagnetic iron oxide nanoparticles. In the in vivo study, the measurement of bioluminescence was performed 21 days after glioblastoma induction with C6 cells in rats. After 24 hours, the aminosilane-coated superparamagnetic iron oxide nanoparticles were implanted in animals, and magnetic hyperthermia was performed for 40 minutes, using the best conditions of frequency and intensity of alternating magnetic field tested in the in vitro study (the highest specific absorption rate value) and verified the difference of bioluminescence before and after magnetic hyperthermia. RESULTS: The aminosilane-coated superparamagnetic iron oxide nanoparticles were stable, and their heating capacity increased along with higher frequency and intensity of alternating magnetic field. The magnetic hyperthermia application with 874kHz and 200 Gauss of alternating magnetic field determined the best value of specific absorption rate (194.917W/g). When these magnetic hyperthermia parameters were used in in vitro and in vivo analysis, resulted in cell death of 52.0% and 32.8%, respectively, detected by bioluminescence. CONCLUSION: The magnetic hyperthermia was promissing for the therapeutical process of glioblastoma tumors in animal model, using aminosilane-coated superparamagnetic iron oxide nanoparticles, which presented high specific absorption rate.

Clinical results of pulsed signal therapy on patellofemoral syndrome with patellar chondropathy.

This study was designed to evaluate the effect of pulsed signal therapy (PST) on patellofemoral pain syndrome associated with patellar chondropathy. A prospective randomized double-blind placebo controlled trial included 25 patients (41 knees) between 20 and 50 years with pain due to isolated patellofemoral syndrome with chondropathy. PST group received nine 60-min daily sessions of PST treatment. Control group received the same protocol of blinded placebo treatment. The main outcome was change from baseline Kujala score at 3 months. After 3 months, patients in the control group received effective treatment (placebo post-treatment). All patients were then followed, for up to 12 months. Seventeen knees (5 males and 12 females, mean age 36.7 ± 7.9) received placebo and 24 knees (8 males and 16 females, mean age 35.5 ± 8.9) received PST. By the third month, PST group exhibited a mean change from baseline of 9.63 ± 7.5 Kujala points, compared to 0.53 ± 1.8 in the placebo group (P < 0.001). A significant progressive improvement was seen in the PST group between the 3rd and 6th and between the 6th and 12th month (P < 0.016). Patients initially allocated in the control group also improved at 3 months (P < 0.001) and 6 months (P = 0.005) post-effective treatment. In conclusion, PST in patellofemoral pain syndrome with chondropathy was effective compared to placebo at 3 months, showing an important improvement of Kujala score. The improvement was progressive and maintained up to 12 months. PST is safe and should be considered as a non-invasive option for management of this condition. Bioelectromagnetics. 40:83-90, 2019. © 2019 Bioelectromagnetics Society.

Therapeutic evaluation of magnetic hyperthermia using Fe3O4-aminosilane-coated iron oxide nanoparticles in glioblastoma animal model / Avaliação terapêutica da técnica de magneto-hipertermia utilizando nanopartículas de Fe3O4 recobertas com aminosilana em modelo animal de glioblastoma

ABSTRACT Objective: To evaluate the potential of magnetic hyperthermia using aminosilane-coated superparamagnetic iron oxide nanoparticles in glioblastoma tumor model. Methods: The aminosilane-coated superparamagnetic iron oxide nanoparticles were analyzed as to their stability in aqueous medium and their heating potential through specific absorption rate, when submitted to magnetic hyperthermia with different frequencies and intensities of alternating magnetic field. In magnetic hyperthermia in vitro assays, the C6 cells cultured and transduced with luciferase were analyzed by bioluminescence in the absence/presence of alternating magnetic field, and also with and without aminosilane-coated superparamagnetic iron oxide nanoparticles. In the in vivo study, the measurement of bioluminescence was performed 21 days after glioblastoma induction with C6 cells in rats. After 24 hours, the aminosilane-coated superparamagnetic iron oxide nanoparticles were implanted in animals, and magnetic hyperthermia was performed for 40 minutes, using the best conditions of frequency and intensity of alternating magnetic field tested in the in vitro study (the highest specific absorption rate value) and verified the difference of bioluminescence before and after magnetic hyperthermia. Results: The aminosilane-coated superparamagnetic iron oxide nanoparticles were stable, and their heating capacity increased along with higher frequency and intensity of alternating magnetic field. The magnetic hyperthermia application with 874kHz and 200 Gauss of alternating magnetic field determined the best value of specific absorption rate (194.917W/g). When these magnetic hyperthermia parameters were used in in vitro and in vivo analysis, resulted in cell death of 52.0% and 32.8%, respectively, detected by bioluminescence. Conclusion: The magnetic hyperthermia was promissing for the therapeutical process of glioblastoma tumors in animal model, using aminosilane-coated superparamagnetic iron oxide nanoparticles, which presented high specific absorption rate.

RESUMO Objetivo: Avaliar o potencial da técnica de magneto-hipertermia utilizando nanopartículas superparamagnéticas de óxido de ferro recobertas com aminosilana em modelo de tumores de glioblastoma. Métodos: As nanopartículas superparamagnéticas de óxido de ferro recobertas com aminosilana foram avaliadas quanto à sua estabilidade em meio aquoso e a seu potencial de aquecimento pela taxa de absorção específica, quando submetidas à magneto-hipertermia, com diferentes frequências e intensidades de campo magnético alternado. Nos ensaios de magneto-hipertermia in vitro, as células C6 cultivadas e transduzidas com luciferase foram avaliadas por bioluminescência na presença/ausência do campo magnético alternado, como também com e sem nanopartículas superparamagnéticas de óxido de ferro recobertas com aminosilana. No estudo in vivo, a medida de bioluminescência foi adquirida no 21º dia após indução do glioblastoma com células C6 nos ratos. Após 24 horas, as nanopartículas superparamagnéticas de óxido de ferro recobertas com aminosilana foram implantadas no animal, tendo sido realizada a magneto-hipertermia por 40 minutos, nas melhores condições de frequência e intensidade de campo magnético alternado testado no estudo in vitro (maior valor da taxa de absorção específica); foi verificada a diferença do bioluminescência antes e após a magneto-hipertermia. Resultados: As nanopartículas superparamagnéticas de óxido de ferro recobertas com aminosilana se mostraram estáveis, e sua capacidade de aquecimento aumentou com o incremento da frequência e da intensidade de campo magnético alternado. A aplicação da magneto-hipertermia, com 874kHz e 200 Gauss do campo magnético alternado, determinou o melhor valor da taxa de absorção específica (194,917W/g). Quando utilizados, estes parâmetros de magneto-hipertermia in vitro resultaram em morte celular de 52,0% e in vivo de 32,8% por bioluminescência. Conclusão: A técnica de magneto-hipertermia foi promissora para o processo terapêutico de tumores de glioblastoma no modelo animal utilizando as nanopartículas superparamagnéticas de óxido de ferro recobertas com aminosilana recobertas com aminosilana, que apresentaram alta taxa de absorção específica.

Campo magnético de frecuencia extremadamente baja: Seguridad de su aplicación a nivel del sistema nervioso central / Magnetic field of extremely low frequency: Safety of its application at the level of the central nervous system

Introducción: La enfermedad cerebrovascular constituye un importante problema de salud a nivel mundial. En la actualidad se desarrollan investigaciones científicas dedicadas al estudio de los efectos del campo magnético de frecuencia extremadamente baja para su tratamiento. No es suficientemente clara la información acerca de su inocuidad en las dosis estudiadas. Objetivo: Estudiar la seguridad de la aplicación del campo magnético de frecuencia extremadamente baja a nivel del sistema nervioso central a través de un estudio toxicológico a dosis aguda, repetida y ensayo de micronúcleos en médula ósea. Métodos: Se conformaron tres grupos experimentales con ratas Sprague Dawley Cenp:SPRD jóvenes y sanas para los experimentos de toxicidad y ratones CENP: NMRI para la evaluación mutagénica. Se utilizaron controles negativos no tratados. En el ensayo de micronúcleos se incorporó un grupo control positivo al que se administró Ciclofosfamida por vía intraperitoneal. Se aplicó un campo magnético no homogéneo con niveles de inducción magnética de 6,5 y 15 mT, tomando como referencia el valor máximo sobre la superficie de la bobina. Para la aplicación del campo magnético la bobina estimuladora se colocó sobre la cabeza asegurando la exposición completa del encéfalo. Resultados: En ninguno de los ensayos se detectaron signos de toxicidad. Se comprobó así mismo que no se indujeron efectos genotóxicos ni citotóxicos sobre las células somáticas. Conclusiones: El tratamiento con campo magnético de frecuencia extremadamente baja a nivel del sistema nervioso central en las condiciones experimentales y dosis estudiadas es seguro(AU)

Introduction: Stroke is a major health problem all over the world. Nowadays are developed scientific researches devoted to the study of extremely low frequency magnetic field effects over this illness. The information about it safety is unclear yet. Objective: To study the safety of extremely low frequency magnetic field applied at central nervous system level wasby means ofa toxicological assay (Acute, repeated doses and micronucleus in bone marrow assay) Methods: Three experimental groups were made with Sprague Dawley Cenp: SPRD young and healthy rats for toxicity experiments and CENP: NMRI mice for mutagen evaluation. Untreated negative controls were used. In the micronucleus assay, an additional positive control group was included. This group received Cyclophosphamide by intraperitoneal administration. Was applied a non-homogenousmagnetic fieldof 6,5 and 15 mT, taken as reference the maximum value over the coil surface. The coil was positioned over the head, ensuring full exposure of brain to magnetic field. Results : In none of trials were detected any sign of toxicity. It was also found no genotoxic or cytotoxic effects induced on somatic cells. Conclusions : These results indicated the safety of treatmentwith extremely low frequency magnetic field at central nervous system level for experimental conditions and doses studied(AU)

Efectividad de la magnetoterapia en la terapéutica de las alveolitis / Effectiveness of magnet therapy in the treatment of alveolitis

Fundamento: la elevada incidencia de las alveolitis en los servicios estomatológicos precisa emplear técnicas de tratamiento eficaz e inofensivo que logren, en el menor tiempo posible, la curación del paciente. La magnetoterapia constituye una opción terapéutica.Objetivo: demostrar la efectividad de la magnetoterapia en la terapéutica de las alveolitis.Métodos: se realizó un estudio cuasi-experimental en la Clínica Estomatológica Ormani Arenado Llonch, de la provincia Pinar del Río, de septiembre de 2014 a agosto de 2015. El universo coincide con la muestra de estudio, que estuvo constituida por 100 pacientes con diagnóstico de alveolitis que cumplieron con los criterios de inclusión y exclusión. Se establecieron dos grupos de estudio comprendidos por 50 pacientes cada uno. En ellos se evaluaron las variables: grupo etario, sexo biológico, evolución y comparación del tratamiento en ambos grupos.Resultados: predominó el sexo femenino, entre 35 y 54 años de edad en ambos grupos. Prevaleció la variante de tratamiento curado en los grupos I y II con 80 por ciento y 42 por ciento. Se destacó la evolución satisfactoria con 96 por ciento de pacientes curados en el grupo I y 92 por ciento en el grupo II sin diferencias significativas.Conclusiones: se demostró la efectividad de la magnetoterapia en las alveolitis como alternativa de tratamiento seguro, técnico e inofensivo para los pacientes que acuden a consulta estomatológica(AU)

Background: the high impact of alveolitis in the dentistry service requires the use of effective and harmless treatment techniques that achieve in less possible time the recovery of the patient. Magnet therapy constitutes a therapeutic option.Objective: to demonstrate the effectiveness of magnet therapy in the treatment of alveolitis.Methods: a quasi-experimental study was carried out in Ormani Arenado Llonch clinic, Pinar del Río, from September 2014 to August 2015. The universe coincides with the sample of study. The latter was made up of 100 patients with diagnosis of alveolitis. They all met inclusion and exclusion criteria. Two groups of study composed of 50 patients were created. In them the following variables were assessed: age group, sex, evolution and comparison of the treatment followed by both groups.Results: female sex prevailed, between 35 and 54 years of age in both groups. Variant of cured treatment in groups I and II was predominant, with 80 percent and 42 percent. Satisfactory evolution with 96 percent of the cured patients in group I was highlighted as well as in group II, without significant differences.Conclusions: effectiveness of magnet therapy in alveolitis as a high save, technical and harmless alternative treatment for patients who attend the dentists(AU)

Effects of a buried magnetic field on cranial bone reconstruction in rats.

The understanding of bone repair phenomena is a fundamental part of dentistry and maxillofacial surgery. Objective The present study aimed to evaluate the influence of buried magnetic field stimulation on bone repair in rat calvaria after reconstruction with autogenous bone grafts, synthetic powdered hydroxyapatite, or allogeneic cartilage grafts, with or without exposure to magnetic stimulation. Material and Methods Ninety male Wistar rats were divided into 18 groups of five animals each. Critical bone defects were created in the rats' calvaria and immediately reconstructed with autogenous bone, powdered synthetic hydroxyapatite or allogeneic cartilage. Magnetic implants were also placed in half the animals. Rats were euthanized for analysis at 15, 30, and 60 postoperative days. Histomorphometric analyses of the quantity of bone repair were performed at all times. Results These analyses showed significant group by postoperative time interactions (p=0.008). Among the rats subjected to autogenous bone reconstruction, those exposed to magnetic stimulation had higher bone fill percentages than those without magnetic implants. Results also showed that the quality of bone repair remained higher in the former group as compared to the latter at 60 postoperative days. Conclusions After 60 postoperative days, bone repair was greater in the group treated with autogenous bone grafts and exposed to a magnetic field, and bone repair was most pronounced in animals treated with autogenous bone grafts, followed by those treated with powdered synthetic hydroxyapatite and allogeneic cartilage grafts.

Effects of a buried magnetic field on cranial bone reconstruction in rats

ABSTRACT The understanding of bone repair phenomena is a fundamental part of dentistry and maxillofacial surgery. Objective The present study aimed to evaluate the influence of buried magnetic field stimulation on bone repair in rat calvaria after reconstruction with autogenous bone grafts, synthetic powdered hydroxyapatite, or allogeneic cartilage grafts, with or without exposure to magnetic stimulation. Material and Methods Ninety male Wistar rats were divided into 18 groups of five animals each. Critical bone defects were created in the rats’ calvaria and immediately reconstructed with autogenous bone, powdered synthetic hydroxyapatite or allogeneic cartilage. Magnetic implants were also placed in half the animals. Rats were euthanized for analysis at 15, 30, and 60 postoperative days. Histomorphometric analyses of the quantity of bone repair were performed at all times. Results These analyses showed significant group by postoperative time interactions (p=0.008). Among the rats subjected to autogenous bone reconstruction, those exposed to magnetic stimulation had higher bone fill percentages than those without magnetic implants. Results also showed that the quality of bone repair remained higher in the former group as compared to the latter at 60 postoperative days. Conclusions After 60 postoperative days, bone repair was greater in the group treated with autogenous bone grafts and exposed to a magnetic field, and bone repair was most pronounced in animals treated with autogenous bone grafts, followed by those treated with powdered synthetic hydroxyapatite and allogeneic cartilage grafts.

Influence of the magnetic field on microorganisms in the oral cavity.

UNLABELLED: Since the beginning of their lives, all living organisms are exposed to the influence of geomagnetic fields. OBJECTIVES: With respect to the positive effects that magnetic fields have on human tissues, especially the bactericidal effect, this investigation aimed to assess their influence on the reduction of oral microorganisms. MATERIAL AND METHODS: In order to obtain adequate specimens of dental plaque deposit, microbes such as Streptococcus parasanguinis, Staphylococcus epidermidis, Rhodococcus equi and Candida albicans were isolated from the human mouth. To establish the intensity of microbial growth on the basis of the modified optical density (OD) of agar turbidimetry assay, microbial count and spectrophotometry were applied. The study was carried out with two microbial concentrations (1 and 10 CFU/ml) after periods of incubation of 24 and 48 h and using micromagnets. RESULTS: A positive effect of the magnetic field, resulting in the reduction of dental plaque microbes in vitro, was found. In the first 24 hours of exposure to the magnetic field, the number of all isolated microbes was significantly reduced. The most potent influence of magnets and the most intensified reduction after 24 hours were evident in Candida albicans colonies. The decrease in the influence of magnets on microbes in vitro was also detected. CONCLUSIONS: Magnets reduce the number of microbes and might be recommended as a supplement in therapy for reduced periodontal tissues. This is important because periodontal tissues that are in good conditions provide prolonged support to the oral tissues under partial and supradental denture.

Transcranial direct current stimulation in obsessive-compulsive disorder: emerging clinical evidence and considerations for optimal montage of electrodes.

BACKGROUND: Neuromodulation techniques for obsessive-compulsive disorder (OCD) treatment have expanded with greater understanding of the brain circuits involved. Transcranial direct current stimulation (tDCS) might be a potential new treatment for OCD, although the optimal montage is unclear. OBJECTIVE: To perform a systematic review on meta-analyses of repetitive transcranianal magnetic stimulation (rTMS) and deep brain stimulation (DBS) trials for OCD, aiming to identify brain stimulation targets for future tDCS trials and to support the empirical evidence with computer head modeling analysis. METHODS: Systematic reviews of rTMS and DBS trials on OCD in Pubmed/MEDLINE were searched. For the tDCS computational analysis, we employed head models with the goal of optimally targeting current delivery to structures of interest. RESULTS: Only three references matched our eligibility criteria. We simulated four different electrodes montages and analyzed current direction and intensity. CONCLUSION: Although DBS, rTMS and tDCS are not directly comparable and our theoretical model, based on DBS and rTMS targets, needs empirical validation, we found that the tDCS montage with the cathode over the pre-supplementary motor area and extra-cephalic anode seems to activate most of the areas related to OCD.

Therapeutic mechanism of treating SMMC-7721 liver cancer cells with magnetic fluid hyperthermia using Fe2O3 nanoparticles

This study aimed to investigate the therapeutic mechanism of treating SMMC-7721 liver cancer cells with magnetic fluid hyperthermia (MFH) using Fe2O3 nanoparticles. Hepatocarcinoma SMMC-7721 cells cultured in vitro were treated with ferrofluid containing Fe2O3 nanoparticles and irradiated with an alternating radio frequency magnetic field. The influence of the treatment on the cells was examined by inverted microscopy, MTT and flow cytometry. To study the therapeutic mechanism of the Fe2O3 MFH, Hsp70, Bax, Bcl-2 and p53 were detected by immunocytochemistry and reverse transcription polymerase chain reaction (RT-PCR). It was shown that Fe2O3 MFH could cause cellular necrosis, induce cellular apoptosis, and significantly inhibit cellular growth, all of which appeared to be dependent on the concentration of the Fe2O3 nanoparticles. Immunocytochemistry results showed that MFH could induce high expression of Hsp70 and Bax, decrease the expression of mutant p53, and had little effect on Bcl-2. RT-PCR indicated that Hsp70 expression was high in the early stage of MFH (<24 h) and became low or absent after 24 h of MFH treatment. It can be concluded that Fe2O3 MFH significantly inhibited the proliferation of in vitro cultured liver cancer cells (SMMC-7721), induced cell apoptosis and arrested the cell cycle at the G2/M phase. Fe2O3 MFH can induce high Hsp70 expression at an early stage, enhance the expression of Bax, and decrease the expression of mutant p53, which promotes the apoptosis of tumor cells.