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1.
Am J Phys Med Rehabil ; 100(12): 1184-1189, 2021 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-34793376

RESUMO

ABSTRACT: Every-other-day fasting is effective for a variety of major human diseases, but the safety of these interventions is uncertain for patients with spinal cord injury. A randomized controlled study was conducted to investigate the safety of every-other-day fasting in patients with spinal cord injury. Participants who met the diagnostic inclusion and exclusion criteria were randomly divided into the control and every-other-day fasting groups. In the every-other-day fasting group, fasting lasted from 09:00 p.m. on day 1 to 06:00 p.m. on the following day (day 2). Dinner on day 2 was restricted to approximately 30% of the average daily calorie intake. The changes in plasma glucose were recorded daily for 2 days and every other day from the third day after every-other-day fasting intervention. The changes in albumin, prealbumin, plasma potassium, serum sodium, blood calcium, body weight, and body mass index were monitored at the baseline and at the end of the every-other-day fasting intervention. The results showed that compared with the control group, the mean blood glucose levels were significantly decreased from the second week after every-other-day fasting intervention. The body weight of patients in the every-other-day fasting group was notably reduced compared with that at baseline, whereas in body mass index, no obvious differences were observed before and after treatment with every-other-day fasting. In general, every-other-day fasting could be considered as a safe approach for individuals with spinal cord injury.


Assuntos
Peso Corporal/fisiologia , Jejum/fisiologia , Traumatismos da Medula Espinal/dietoterapia , Adulto , Glicemia/metabolismo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Recuperação de Função Fisiológica , Adulto Jovem
2.
Aging (Albany NY) ; 13(9): 12973-12995, 2021 05 06.
Artigo em Inglês | MEDLINE | ID: mdl-33962394

RESUMO

The ketogenic diet has been widely used in the treatment of various nervous system and metabolic-related diseases. Our previous research found that a ketogenic diet exerts a protective effect and promotes functional recovery after spinal cord injury. However, the mechanism of action is still unclear. In this study, different dietary feeding methods were used, and myelin expression and gene level changes were detected among different groups. We established 15 RNA-seq cDNA libraries from among 4 different groups. First, KEGG pathway enrichment of upregulated differentially expressed genes and gene set enrichment analysis of the ketogenic diet and normal diet groups indicated that a ketogenic diet significantly improved the steroid anabolic pathway in rats with spinal cord injury. Through cluster analysis, protein-protein interaction analysis and visualization of iPath metabolic pathways, it was determined that Sqle, Sc5d, Cyp51, Dhcr24, Msmo1, Hsd17b7, and Fdft1 expression changed significantly. Second, through weighted gene co-expression network analysis showed that rats fed a ketogenic diet showed a significant reduction in the expression of genes involved in immune-related pathways, including those associated with immunity and infectious diseases. A ketogenic diet may improve the immune microenvironment and myelin growth in rats with spinal cord injury through reprogramming of steroid metabolism.


Assuntos
Dieta Cetogênica , Bainha de Mielina/metabolismo , Traumatismos da Medula Espinal/dietoterapia , Esteroides/metabolismo , Animais , Modelos Animais de Doenças , Redes Reguladoras de Genes , Humanos , Masculino , Redes e Vias Metabólicas/genética , Redes e Vias Metabólicas/imunologia , Bainha de Mielina/imunologia , Bainha de Mielina/patologia , Mapas de Interação de Proteínas , RNA-Seq , Ratos , Recuperação de Função Fisiológica , Traumatismos da Medula Espinal/imunologia , Traumatismos da Medula Espinal/metabolismo , Traumatismos da Medula Espinal/patologia
3.
Top Spinal Cord Inj Rehabil ; 27(1): 100-108, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33814888

RESUMO

Following spinal cord injury (SCI), individuals are at high risk for obesity and several chronic cardiometabolic disorders due to a deterioration in body composition, hypometabolic rate, and endometabolic dysregulation. Countermeasures to the consequences of an SCI include adopting a healthy diet that provides adequate nutrition to maintain good body habitus and cardiometabolic health. A proper diet for individuals with SCI should distribute carbohydrates, protein, and fat to optimize a lower energy intake requirement and should stress foods with low caloric yet high nutrient density. The purpose of this article is to present available evidence on how nutritional status after SCI should advance future research to further develop SCI-specific guidelines for total energy intake, as it relates to percent carbohydrates, protein, fat, and all vitamins and minerals, that take into consideration the adaptations after SCI.


Assuntos
Dietética/métodos , Ingestão de Energia , Estado Nutricional , Obesidade/complicações , Obesidade/dietoterapia , Traumatismos da Medula Espinal/complicações , Traumatismos da Medula Espinal/dietoterapia , Humanos
4.
J Neurotrauma ; 38(3): 373-384, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33076741

RESUMO

Spinal cord injury (SCI) is one of the leading causes of neurological disability and death. So far, there is no satisfactory treatment for SCI, because of its complex and ill-defined pathophysiology. Recently, autophagy has been implicated as protective in acute SCI rat models. Here, we investigated the therapeutic value of a dietary intervention, namely, intermittent fasting (IF), on neuronal survival after acute SCI in rats, and its underlying mechanism related to autophagy regulation. We found remarkable improvement in both behavioral performance and neuronal survival at the injured segment of the spinal cord of animals previously subjected to IF. Western blotting revealed a marked decrease in apoptosis-related markers such as cleaved caspase 3 levels and the bax/bcl-2 ratio in the IF group, which suggested an inhibition of the intrinsic apoptosis pathway. In addition, the expression of the autophagy markers LC3-II and beclin 1 was also increased in the IF group compared with ad libitum fed animals. In parallel, IF decreased the levels of the substrate protein of autophagy, p62, indicative of an upregulation of the autophagic processes. Treatment with 3-methyladenine (3-MA), a selective inhibitor of autophagy, reversed the downregulated apoptosis-related markers by IF. Finally, IF could activate the adenosine monophosphate (AMP)-activated protein kinase (AMPK)/mammalian target of rapamycin (mTOR) pathway and enhance lysosome function by upregulating transcription factor (TF)EB expression. Altogether, the present findings suggest that IF exerts a neuroprotective effect after acute SCI via the upregulation of autophagy, and further points to dietary interventions as a promising combinatorial treatment for SCI.


Assuntos
Autofagia/fisiologia , Jejum , Neurônios/patologia , Traumatismos da Medula Espinal/dietoterapia , Animais , Sobrevivência Celular , Modelos Animais de Doenças , Masculino , Atividade Motora , Ratos , Ratos Sprague-Dawley , Recuperação de Função Fisiológica , Traumatismos da Medula Espinal/patologia , Traumatismos da Medula Espinal/fisiopatologia
5.
Oxid Med Cell Longev ; 2020: 9869851, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33194008

RESUMO

BACKGROUND: Urinary tract infection (UTI) is common in individuals with spinal cord injury (SCI) and neurogenic lower urinary tract dysfunction (NLUTD) and in veterans with SCI who use antibiotics improperly for asymptomatic bacteriuria. Cranberry (CB) has been suggested for UTI prevention. METHODS: We performed a systematic search up to May 2020 in the following databases: AccessMedicine, BioMed Central, CINAHL, Cochrane Library, ProQuest, and PubMed. Quality assessment was performed using a specifically designed quality score. Risk ratio was calculated with both random effect model analysis (DerSimonian-Laird method) and quality effect model analysis (Doi Thalib method). RESULTS: Six studies on bacteriuria and SCI were reviewed. From the four studies available for meta-analysis, two of which with individuals taking both CB and control, 477 data from 415 participants were analysed (241 CB and 236 control). No significant differences were detected with meta-analysis. However, bias, limitations, and incompleteness were observed in the reviewed studies. CONCLUSION: Although further studies are needed, we suggest an accurate monitoring of diet and fluid intake, the evaluation of risk for potential food or nutraceutical interactions with drugs, and the inclusion of inflammatory markers among the outcomes in addition to UTI.


Assuntos
Bacteriúria/dietoterapia , Traumatismos da Medula Espinal/dietoterapia , Vaccinium macrocarpon , Humanos
6.
Top Spinal Cord Inj Rehabil ; 26(3): 197-202, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33192047

RESUMO

Physiological changes that occur after spinal cord injury (SCI) are profound and affect almost every organ system in the human body. Energy balance is significantly altered due to motor paralysis, spasticity or flaccidity, neurogenic sarcopenia, neurogenic osteopenia, sympathetic nervous system disruption, and blunted anabolism. Energy expenditure is markedly reduced, whereas hypothalamic control of appetite and satiety is diminished, resulting in discordant energy intake. Ultimately, neurogenic obesity ensues as the result of a positive energy balance. Even though nutritional guidelines for persons with SCI have been available since 2009, the necessity for body composition assessment and total daily energy expenditure was insufficiently addressed such that most individuals with SCI continued in positive energy balance despite "adherence" to the guidelines. Macronutrients must be carefully assessed to optimize caloric intake, while micronutrient consumption may need to be supplemented in order to meet recommended daily allowances. Such a diet would emphasize foods with low caloric yet high nutrient density. This article reviews current literature regarding nutritional requirements for SCI and provides a straightforward plan for implementing more rigorous dietary interventions meant to address the obesity crisis in this especially vulnerable population.


Assuntos
Metabolismo Energético , Necessidades Nutricionais , Atenção Primária à Saúde , Traumatismos da Medula Espinal/dietoterapia , Humanos
8.
Trials ; 21(1): 372, 2020 May 04.
Artigo em Inglês | MEDLINE | ID: mdl-32366293

RESUMO

BACKGROUND: Therapies that significantly improve the neurological and functional recovery of individuals with spinal cord injury (SCI) are still urgently needed. The ketogenic diet (KD) has been shown to improve forelimb motor function in an SCI rat model, likely by reducing inflammation and cell death in the spinal cord. Furthermore, our recent pilot study in patients with SCI showed that, compared with a standard hospital diet (SD), 5 weeks of KD started during acute care improved upper extremity motor function and reduced serum levels of a neuroinflammatory blood protein. The primary goals of the current study are to: 1) show the safety and feasibility of administering a KD during acute care for SCI; 2) determine if consuming 5 weeks of a KD significantly improves motor and sensory functions, functional independence and glycemic control; and 3) quantify serum biomarkers that are linked to improvements in neurological recovery and functional independence via targeted proteomics. METHODS/DESIGN: In a single-masked, longitudinal, randomized, parallel-controlled study, a total of 60 eligible, acutely traumatic spinal cord injured (cervical 5 to thoracic 12) participants ranging in age from 18 to 60 years with American Spinal Injury Association impairment scale (AIS) grades A-C (AIS-A, sensorimotor complete; AIS-B, sensory incomplete/motor complete; and AIS-C, nonfunctional motor incomplete) are being enrolled. Neurological and functional examinations, resting energy expenditure, blood, urine, and stool collections, and protein analyses related to neurological recovery will be performed within 72 h of injury (baseline measure) and repeated after 5 weeks of KD or SD (discharge measure). We anticipate a completion rate of 80% with a total of 48 participants. DISCUSSION: Intervention with a more neuroprotective diet during acute care of SCI can be implemented anywhere in the world at low cost and without major regulatory hurdles. Better functional recovery will lead to a better quality of life and long-term health outcomes in individuals with SCI. While this study targets SCI, if successful it has the potential to improve neurological outcomes for individuals with various traumatic injuries. TRIAL REGISTRATION: NCT03509571 Registered on April 28, 2018.


Assuntos
Dieta Cetogênica/métodos , Recuperação de Função Fisiológica , Sensação , Traumatismos da Medula Espinal/dietoterapia , Doença Aguda , Adolescente , Adulto , Vértebras Cervicais/lesões , Metabolismo Energético , Estudos de Avaliação como Assunto , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Método Simples-Cego , Vértebras Torácicas/lesões , Resultado do Tratamento , Adulto Jovem
9.
Trials ; 20(1): 466, 2019 Jul 30.
Artigo em Inglês | MEDLINE | ID: mdl-31362773

RESUMO

BACKGROUND: Metabolic disorders (e.g., impaired glucose tolerance, insulin resistance, and type 2 diabetes) are more prevalent in people with spinal cord injury (SCI) than able-bodied individuals. Dietary modification is a more cost-effective treatment option than pharmacological therapies for reducing the risk of metabolic dysfunction. Lowering carbohydrate, increasing protein, and maintaining a proper dietary fat intake are expected to induce favorable adaptations in glucose control, body fat distribution, and the composition of the gut microbiome. However, dietary modification has not been rigorously investigated in people with SCI. The purpose of this study is to determine if an 8-week low-carbohydrate/high-protein (LC/HP) dietary intervention will show improvements in clinically important metrics of metabolic function, body composition, the composition of gut bacteria, and quality of life. METHODS/DESIGN: We intend to recruit 100 participants with chronic traumatic SCI (3 years postinjury, C5-L2, American Spinal Injury Association impairment scale A-D, and aged 18-65 years) and insulin resistance, impaired glucose tolerance or untreated type 2 diabetes and randomly assign them to an 8-week LC/HP dietary intervention group or a control group. The daily LC/HP dietary intervention includes ~ 30% total energy as protein (1.6 g/kg per day) with a carbohydrate-to-protein ratio < 1.5 and fat intake set at ~ 30% of the total energy intake. The control group does not receive any dietary intervention and are continuing with their regular daily diets. Glucose tolerance, insulin sensitivity, ß-cell function, body composition, gut microbiome composition, and quality of life measures are assessed at week 1, before starting the LC/HP dietary intervention, and at week 8, after completion of the LC/HP dietary intervention. DISCUSSION: New information derived from this project will result in the development of a low-cost, simple, self-administered LC/HP dietary intervention for improving metabolic function in individuals with chronic SCI, improved understanding of the composition of gut bacteria in SCI, and how a LC/HP dietary intervention alters gut bacteria composition. In addition, this project will improve our understanding of the relationship between metabolic function and quality of life in individuals with long-standing SCI. TRIAL REGISTRATION: ClinicalTrials.gov, NCT03207841. Registered on 5 June 2017.


Assuntos
Dieta Rica em Proteínas e Pobre em Carboidratos , Ingestão de Energia , Metabolismo Energético , Doenças Metabólicas/dietoterapia , Valor Nutritivo , Traumatismos da Medula Espinal/dietoterapia , Adolescente , Adulto , Idoso , Alabama , Biomarcadores/sangue , Composição Corporal , Dieta Rica em Proteínas e Pobre em Carboidratos/efeitos adversos , Feminino , Microbioma Gastrointestinal , Nível de Saúde , Humanos , Masculino , Doenças Metabólicas/sangue , Doenças Metabólicas/microbiologia , Doenças Metabólicas/fisiopatologia , Pessoa de Meia-Idade , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Traumatismos da Medula Espinal/sangue , Traumatismos da Medula Espinal/microbiologia , Traumatismos da Medula Espinal/fisiopatologia , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
10.
Rehabil Nurs ; 44(1): 11-19, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30601797

RESUMO

PURPOSE: To explore if SCI-SCREEN was applicable as nutritional screening model in a neurorehabilitation unit, able to detect spinal cord injury (SCI) persons at nutritional risk. DESIGN AND METHODS: SCI-SCREEN underwent reliability test by 3 specialist nurses, using 10 consecutive SCI in-patients. Audit of 41 SCI-patients was conducted comparing SCI SCREEN with the Danish-Nutritional-Screening-Model-for-hospitalized-persons (DNSM). FINDINGS: Inter- and intra-tester reliability (Cohen's Kappa: 0.89-0.93) was high. SCI-SCREEN estimated average energy needs 23% lower (mean difference± SD: 2516.2±1349.1kJ) and protein needs 10% lower (9.5±19.7g/day). Risk assessment differed in 61% (CI95: 42.1; 73.7%) of cases and risk-agreement was obtained in 22% (CI95: 10.6; 37.6%). SCI-SCREEN detected 66% (CI95: 44.5; 75.8%) and DNSM 39% at risk of malnutrition. CONCLUSIONS: The SCI-SCREEN model estimates SCI-energy and protein needs more accurately than DNSM by adjusting to SCI-consequences. However, more studies are needed. CLINICAL RELEVANCE: SCI-SCREEN is a reasonable starting-point in the screening procedure and may be a valuable instrument to identify SCI-patients at risk of malnutrition.


Assuntos
Desnutrição/diagnóstico , Programas de Rastreamento/normas , Estado Nutricional , Traumatismos da Medula Espinal/complicações , Adulto , Idoso , Idoso de 80 Anos ou mais , Dinamarca , Feminino , Humanos , Masculino , Desnutrição/dietoterapia , Desnutrição/etiologia , Programas de Rastreamento/métodos , Programas de Rastreamento/estatística & dados numéricos , Pessoa de Meia-Idade , Avaliação Nutricional , Reprodutibilidade dos Testes , Medição de Risco/métodos , Medição de Risco/normas , Medição de Risco/estatística & dados numéricos , Traumatismos da Medula Espinal/dietoterapia
11.
Spinal Cord ; 57(1): 3-17, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30420688

RESUMO

STUDY DESIGN: Systematic review and meta-analysis. OBJECTIVES: The objective was to investigate nutritional status in chronic spinal cord injury (SCI), and compare macronutrient and micronutrient intake to the recommended values by the United States Department of Agriculture (USDA) 2015-2020 Dietary Guidelines for Americans. SETTING: United States of America. METHODS: A MEDLINE/PubMed, Google Scholar, Scopus, and Web of Science search was performed, identifying 268 papers. All papers included were English-language papers examining adults with chronic SCI. A meta-analysis was performed to produce weighted averages and 95% confidence intervals (CI) when summary statistics were provided. RESULTS: The systematic review included 15 articles, while the meta-analysis included 12. Resting metabolic rate (1492 kcal/day; CI: 1414-1569) fell below the able-bodied average, and total energy (1876 kcal/day; CI: 1694-2059) and fiber (17 g/day; CI: 14-20) intake were below USDA guidelines. Protein (319 kcal/day; CI: 294-345) and carbohydrate (969 kcal/day; CI: 851-1087) intake were above guidelines. Fat intake (663 kcal/day; CI: 590-736) was within USDA guidelines. Vitamins A, B5, B7, B9, D, E, potassium, and calcium were deficient, while vitamins B1, B2, B3, B12, C, K, sodium, phosphorus, copper, and zinc were in excess according to USDA guidelines. Vitamin B6, iron, and magnesium were within USDA guidelines. CONCLUSION: Findings indicate greater energy intake relative to energy needs in those with chronic SCI, and an imbalance in fiber intake and micronutrients compared to the USDA guidelines. Future research examining nutritional health status is needed in order to establish evidence-based, SCI-specific dietary guidelines.


Assuntos
Estado Nutricional , Traumatismos da Medula Espinal/metabolismo , Doença Crônica , Humanos , Traumatismos da Medula Espinal/dietoterapia
12.
Neurosci Lett ; 683: 13-18, 2018 09 14.
Artigo em Inglês | MEDLINE | ID: mdl-29894768

RESUMO

Oxidative stress and inflammation are two key secondary pathological mechanisms following spinal cord injury (SCI). Ketogenic diet (KD) and its metabolite ß-hydroxybutyrate have been found to exhibit anti-oxidative and anti-inflammatory properties both in rats with SCI and in healthy rats; however, the underlying mechanisms are not yet fully understood. We investigated the effects of KD on the suppression of oxidative stress and inflammation, activation of nuclear factor-E2 related factor 2 (Nrf2), and inhibition of the nuclear factor-κB (NF-κB) signaling pathway in rats with SCI. We assessed functional recovery and evaluated the status of oxidative stress and inflammation using tests of superoxide dismutase and myeloperoxidase activity. We further assessed the presence of the proinflammatory cytokines tumor necrosis factor α (TNF-α), interleukin 1ß (IL-1ß), and interferon γ (IFN-γ) by ELISA. Western blotting was used to detect Nrf2 and NF-κB pathway-associated proteins in spinal cord tissue. Finally, we measured the levels of the NF-κB downstream genes TNF-α, IL-1ß, and IFN-γ by western blotting and real-time quantitative PCR. Following SCI, KD improved functional recovery, attenuated oxidative stress and inflammation, and induced Nrf2 activation. In addition, KD suppressed the NF-κB pathway and the expression of TNF-α, IL-1ß, and IFN-γ. Together, these findings provide new insight into the underlying regulatory mechanisms of KD.


Assuntos
Dieta Cetogênica/métodos , Fator 2 Relacionado a NF-E2/metabolismo , NF-kappa B/metabolismo , Estresse Oxidativo/fisiologia , Traumatismos da Medula Espinal/dietoterapia , Traumatismos da Medula Espinal/metabolismo , Animais , Dieta Cetogênica/tendências , Inflamação/dietoterapia , Inflamação/metabolismo , Mediadores da Inflamação/antagonistas & inibidores , Mediadores da Inflamação/metabolismo , Masculino , NF-kappa B/antagonistas & inibidores , Distribuição Aleatória , Ratos , Ratos Sprague-Dawley , Transdução de Sinais/fisiologia
13.
Int J Behav Nutr Phys Act ; 14(1): 132, 2017 09 26.
Artigo em Inglês | MEDLINE | ID: mdl-28950900

RESUMO

BACKGROUND: Despite obesity being highly prevalent in persons with spinal cord injury (SCI), our current understanding of the interactions between energy balance components, which may contribute to this, is limited. The primary aim of this study is to identify the intra-individual variability of physical activity dimensions across days and suggest an appropriate monitoring time frame for these constructs in adults with SCI. The secondary aim is to examine these parameters with regard to energy intake and dietary macronutrient composition. METHODS: Participants [33 men and women with chronic (> 1 year post injury) paraplegia; age = 44 ± 9 years (mean ± S.D.] wore an Actiheart™ PA monitor and completed a weighed food diary for 7 consecutive days. Spearman-Brown Prophecy Formulae, based on Intraclass Correlations of .80 (acceptable reliability), were used to predict the number of days required to measure energy balance components. Linear mixed-effects analyses and magnitude-based inferences were performed for all energy intake, expenditure and physical activity dimensions. Adjustments were made for age, injury level, wear time, sex, day of the week and measurement order as fixed effects. RESULTS: To reliably measure energy expenditure components; 1 day [total energy expenditure (TEE)], 2 days [physical activity energy expenditure (PAEE), light-intensity activity, moderate-to-vigorous PA (MVPA)], 3 days [physical activity level (PAL)] and 4 days (sedentary behaviour) are necessary. Device wear time (P < 0.02), injury level (P < 0.04) and sex (P < 0.001) were covariates for energy expenditure components. Four and ≤24 days are required to reliably measure total energy intake (kcal) and diet macronutrient composition (%), respectively. Measurement order (from day 1-7) was a covariate for total energy intake (P = 0.01). CONCLUSIONS: This is the first study to demonstrate the variability of energy intake and expenditure components in free-living persons with chronic (> 1 year) paraplegia and propose suitable measurement durations to achieve acceptable reliability in outcome measures. Device wear time and measurement order play a role in the quality of energy expenditure and intake data, respectively, and should be considered when designing and analysing studies of energy balance components in persons with SCI. TRIAL REGISTRATION: N/A.


Assuntos
Ingestão de Energia , Metabolismo Energético , Exercício Físico , Paraplegia/metabolismo , Adulto , Antropometria , Composição Corporal , Estudos de Coortes , Dieta , Registros de Dieta , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Avaliação Nutricional , Paraplegia/fisiopatologia , Reprodutibilidade dos Testes , Traumatismos da Medula Espinal/dietoterapia , Traumatismos da Medula Espinal/fisiopatologia , Adulto Jovem
14.
Sci Rep ; 7(1): 1003, 2017 04 21.
Artigo em Inglês | MEDLINE | ID: mdl-28432362

RESUMO

Mitochondrial dysfunction, the inability to efficiently utilise metabolic fuels and oxygen, contributes to pathological changes following traumatic spinal cord or traumatic brain injury (TBI). In the present study, we tested the hypothesis that succinate supplementation can improve cellular energy state under metabolically stressed conditions in a robust, reductionist in vitro model of mitochondrial dysfunction in which primary mixed glial cultures (astrocytes, microglia and oligodendrocytes) were exposed to the mitochondrial complex I inhibitor rotenone. Cellular response was determined by measuring intracellular ATP, extracellular metabolites (glucose, lactate, pyruvate), and oxygen consumption rate (OCR). Rotenone produced no significant changes in glial ATP levels. However, it induced metabolic deficits as evidenced by lactate/pyruvate ratio (LPR) elevation (a clinically-established biomarker for poor outcome in TBI) and decrease in OCR. Succinate addition partially ameliorated these metabolic deficits. We conclude that succinate can improve glial oxidative metabolism, consistent our previous findings in TBI patients' brains. The mixed glial cellular model may be useful in developing therapeutic strategies for conditions involving mitochondrial dysfunction, such as TBI.


Assuntos
Metabolismo Energético/efeitos dos fármacos , Mitocôndrias/efeitos dos fármacos , Neuroglia/citologia , Rotenona/efeitos adversos , Ácido Succínico/farmacologia , Animais , Lesões Encefálicas Traumáticas/dietoterapia , Lesões Encefálicas Traumáticas/metabolismo , Lesões Encefálicas Traumáticas/fisiopatologia , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Células Cultivadas , Suplementos Nutricionais , Mitocôndrias/fisiologia , Modelos Biológicos , Neuroglia/efeitos dos fármacos , Neuroglia/metabolismo , Consumo de Oxigênio/efeitos dos fármacos , Ratos , Ratos Sprague-Dawley , Traumatismos da Medula Espinal/dietoterapia , Traumatismos da Medula Espinal/metabolismo , Traumatismos da Medula Espinal/fisiopatologia
15.
Spinal Cord ; 55(1): 26-32, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27324320

RESUMO

STUDY DESIGN: This study was a randomized, parallel-group, controlled clinical trial. OBJECTIVES: The purpose of this study was to examine the efficacy of targeting inflammation as a means of improving cognitive function in individuals with spinal cord injury. SETTING: Participants were recruited from the Niagara region of Ontario Canada and all testing occurred on-site at Brock University. METHODS: Indices of memory and verbal learning were assessed by means of the California Verbal Learning Test (CVLT). Inflammation and concentrations of neuroactive compounds related to the kynurenine pathway were assessed via a number of pro- and anti-inflammatory cytokines, as well as tryptophan, kynurenine and several large neutral amino acids. All assessments were performed at baseline as well as at 1 month and 3 months during a 3-month intervention by means of an anti-inflammatory diet. RESULTS: Despite a reduction in inflammation, all measures of the CVLT, including list A, trial 1 (P=0.48), learning slope (P=0.46), long delay free recall (P=0.83), intrusions (P=0.61) and repetitions (P=0.07), showed no significant group × time interaction. CONCLUSION: It may be possible that the reduction in inflammation achieved in the current study was insufficient to induce substantial changes in indices of verbal learning and memory. Alternatively, as these participants likely underwent years of previous chronic inflammation, the underlying hippocampal damage may have negated potential improvements induced by acute reductions in inflammation.


Assuntos
Cognição/fisiologia , Traumatismos da Medula Espinal/dietoterapia , Traumatismos da Medula Espinal/imunologia , Adulto , Idoso , Biomarcadores/sangue , Feminino , Humanos , Cinurenina/metabolismo , Aprendizagem/fisiologia , Masculino , Rememoração Mental/fisiologia , Pessoa de Meia-Idade , Neuroimunomodulação/fisiologia , Testes Neuropsicológicos , Traumatismos da Medula Espinal/psicologia , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
16.
Adv Neurobiol ; 12: 27-39, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27651246

RESUMO

Spinal cord injury (SCI) has become one of the most leading concerns in the past decade. Preclinical and research studies are now ongoing trying to understand the molecular mechanisms and develop treatment strategies for this neurodegenerative condition. In the last decade, researchers have deciphered few of the leading players that play a major role in worsening the condition. But till date none of these have been applied to the clinical treatment of patients with SCI. Here in this chapter I discuss about one of the dietary requirements that could ameliorate the condition of these patients.


Assuntos
Ácidos Docosa-Hexaenoicos/uso terapêutico , Traumatismos da Medula Espinal/dietoterapia , Ácidos Docosa-Hexaenoicos/farmacologia , Humanos , Medula Espinal/efeitos dos fármacos
17.
J Neuroinflammation ; 13(1): 152, 2016 06 17.
Artigo em Inglês | MEDLINE | ID: mdl-27316678

RESUMO

BACKGROUND: The purpose of the present study was to examine the effectiveness of an anti-inflammatory intervention as a treatment for neuropathic pain following spinal cord injury (SCI). METHODS: This randomized, parallel-group, controlled clinical trial (NCT02099890) examined 20 participants with varying levels and severities of SCI, randomized (3:2) to either a 12-week anti-inflammatory diet, or control group. Outcome measures consisted of self-determined indices of pain as assessed using the neuropathic pain questionnaire (NPQ) and markers of inflammation as assessed by various pro- and anti-inflammatory cytokines, as well as the eicosanoids PGE2 and LTB4. RESULTS: A significant group × time interaction was found for sensory pain scores (p < 0.01). A Mann-Whitney test revealed that the change scores (3-month baseline) were significantly different between groups for IFN-y (U = 13.0, p = 0.01), IL-1ß (U = 14.0, p = 0.01), and IL-2 (U = 12.0, p = 0.01). A Friedman test revealed the treatment group had a significant reduction in IFN-y (x (2) = 8.67, p = 0.01), IL-1ß (x (2) = 17.78, p < 0.01), IL-6 (x (2) = 6.17, p < 0.05), while the control group showed no significant change in any inflammatory mediator. A stepwise backward elimination multiple regression analysis showed that the change in sensory neuropathic pain was a function of the change in the proinflammatory cytokines IL-2 and IFN-y, as well as the eicosanoid PGE2 (R = 0.689, R (2) = 0.474). CONCLUSIONS: Overall, the results of the study demonstrate the efficacy of targeting inflammation as a means of treating neuropathic pain in SCI, with a potential mechanism relating to the reduction in proinflammatory cytokines and PGE2. TRIAL REGISTRATION: ClinicalTrials.gov, NCT02099890.


Assuntos
Antioxidantes/administração & dosagem , Mediadores da Inflamação/sangue , Neuralgia/sangue , Neuralgia/dietoterapia , Traumatismos da Medula Espinal/sangue , Traumatismos da Medula Espinal/dietoterapia , Adulto , Idoso , Dieta com Restrição de Carboidratos/métodos , Dieta com Restrição de Proteínas/métodos , Feminino , Humanos , Mediadores da Inflamação/antagonistas & inibidores , Masculino , Pessoa de Meia-Idade , Neuralgia/diagnóstico , Traumatismos da Medula Espinal/diagnóstico , Resultado do Tratamento
18.
Neurobiol Dis ; 82: 504-515, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26388399

RESUMO

Spinal cord injury leads to major neurological impairment for which there is currently no effective treatment. Recent clinical trials have demonstrated the efficacy of Fortasyn® Connect in Alzheimer's disease. Fortasyn® Connect is a specific multi-nutrient combination containing DHA, EPA, choline, uridine monophosphate, phospholipids, and various vitamins. We examined the effect of Fortasyn® Connect in a rat compression model of spinal cord injury. For 4 or 9 weeks following the injury, rats were fed either a control diet or a diet enriched with low, medium, or high doses of Fortasyn® Connect. The medium-dose Fortasyn® Connect-enriched diet showed significant efficacy in locomotor recovery after 9 weeks of supplementation, along with protection of spinal cord tissue (increased neuronal and oligodendrocyte survival, decreased microglial activation, and preserved axonal integrity). Rats fed the high-dose Fortasyn® Connect-enriched diet for 4 weeks showed a much greater enhancement of locomotor recovery, with a faster onset, than rats fed the medium dose. Bladder function recovered quicker in these rats than in rats fed the control diet. Their spinal cord tissues showed a smaller lesion, reduced neuronal and oligodendrocyte loss, decreased neuroinflammatory response, reduced astrocytosis and levels of inhibitory chondroitin sulphate proteoglycans, and better preservation of serotonergic axons than those of rats fed the control diet. These results suggest that this multi-nutrient preparation has a marked therapeutic potential in spinal cord injury, and raise the possibility that this original approach could be used to support spinal cord injured patients.


Assuntos
Suplementos Nutricionais , Ácidos Docosa-Hexaenoicos , Ácido Eicosapentaenoico , Fosfolipídeos , Traumatismos da Medula Espinal/dietoterapia , Animais , Astrócitos/imunologia , Astrócitos/patologia , Morte Celular , Sobrevivência Celular , Cicatriz/dietoterapia , Cicatriz/patologia , Cicatriz/fisiopatologia , Modelos Animais de Doenças , Feminino , Gliose/dietoterapia , Gliose/patologia , Gliose/fisiopatologia , Atividade Motora , Neurônios/imunologia , Neurônios/patologia , Oligodendroglia/imunologia , Oligodendroglia/patologia , Ratos Sprague-Dawley , Ratos Wistar , Recuperação de Função Fisiológica , Medula Espinal/imunologia , Medula Espinal/patologia , Traumatismos da Medula Espinal/patologia , Traumatismos da Medula Espinal/fisiopatologia , Vértebras Torácicas , Resultado do Tratamento , Bexiga Urinária/fisiopatologia
19.
Spinal Cord ; 53(12): 855-9, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25987004

RESUMO

OBJECTIVES: The present study was undertaken to review the service provision in spinal cord injury (SCI) centres (SCICs); to establish and compare how much time dietitians spend in direct and indirect contact with patients; and to document current nutritional screening practices. METHODS: All 12 SCICs in the United Kingdom and the Republic of Ireland were surveyed by a postal questionnaire in April 2014. Data collected included the number of whole-time-equivalent (WTE) staff available, whether a nutrition team was present and the use of nutrition screening tools. A work sampling tool was used to capture dietetic activity for a period of 1 week. RESULTS: Eight (66.7%) SCICs responded (390/531 of total SCI beds) and the average numbers of patients per WTE staff, including consultants, nurses, dietitians, physiotherapists, occupational therapists were recorded. Six out of eight SCICs used a validated nutritional screening tool. Thirty-two work sampling tools were analysed, revealing that spinal dietitians spend 39.1% of the working day in direct patient-related activities. Staffing levels varied and were below clinical recommendations in six out of eight SCICs. CONCLUSION: The resources allocated to nutritional care in SCICs appear to be varied and limited. This suggests malnutrition may continue to be under-recognised and under-treated. To address the complex nutritional needs of this special population group there is a clear need to establish staffing level for dietitians. Information collected from the present study could contribute to the supply analysis of a future workforce planning exercise in SCIC dietetic service.


Assuntos
Dietética/métodos , Estudos Multicêntricos como Assunto , Apoio Nutricional , Traumatismos da Medula Espinal/dietoterapia , Estudos Transversais , Dietética/normas , Feminino , Pessoal de Saúde , Humanos , Irlanda , Masculino , Estado Nutricional , Alocação de Recursos , Traumatismos da Medula Espinal/reabilitação , Inquéritos e Questionários , Reino Unido
20.
Spinal Cord ; 53(8): 621-4, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25753493

RESUMO

STUDY DESIGN: A randomized, double-blind, placebo-controlled clinical trial. OBJECTIVE: To assess the effect of alpha-lipoic acid (ALA) supplementation on IL-6, hs-CRP, FBS, anthropometric indices, food intake and blood pressure in male patients with chronic spinal cord injury (SCI). SETTING: Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran. METHODS: Fifty-eight men with chronic SCI participated in the study. Participants were divided in two groups: one group received 600 mg of supplemental ALA (n=28) and the other group received placebo (n=30) for 12 weeks. At the beginning and end of the study, biochemical parameters, anthropometric indices, blood pressure and dietary intakes were measured. Dietary intake was measured using N4 software, and statistical analyses were carried out using SPSS16. RESULTS: No significant reduction was found in IL-6 (P=0.97) and hs-CRP levels (P=0.23). There was significant reduction in fasting blood sugar (P=0.001), body weight (P=0.001), BMI (P=0.001), waist circumference (P=0.001) and blood pressure (P=0.001). Dietary intake was significantly reduced, including fat (P=0.001), carbohydrate (P=0.001), protein (P=0.002) and energy intakes (P=0.001). CONCLUSION: Lipoic acid supplementation had no significant effect on the measured inflammatory markers but it reduces fasting blood sugar, anthropometric parameters, food intake and blood pressure in men with chronic SCI.


Assuntos
Doenças Cardiovasculares/dietoterapia , Doenças Cardiovasculares/etiologia , Traumatismos da Medula Espinal/complicações , Traumatismos da Medula Espinal/dietoterapia , Ácido Tióctico/administração & dosagem , Complexo Vitamínico B/administração & dosagem , Adulto , Antropometria , Análise Química do Sangue , Glicemia , Pressão Sanguínea/fisiologia , Índice de Massa Corporal , Método Duplo-Cego , Ingestão de Alimentos/fisiologia , Jejum/sangue , Humanos , Irã (Geográfico) , Masculino , Fatores de Risco
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