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Günbatar N, Bulduk B, Bezgin S, Oto G, Bayıroğlu F, Bulduk M. The Effect of Moderate-Intensity Physical Exercise on Some Serum Inflammation Markers and the Immune System in Rats Fed Intermittent Fasting with a High-Fat Diet. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1687. [PMID: 37763806 PMCID: PMC10537032 DOI: 10.3390/medicina59091687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/15/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023]
Abstract
Background and Objectives: This study aimed to investigate the impact of moderate-intensity physical exercise on serum inflammation markers and the immune system in rats that were fed a high-fat diet (HFD) with intermittent fasting. Materials and Methods: A total of 48 Wistar albino male rats were included in the study and divided into eight groups, each consisting of six rats. Group 1 served as the control group (CG), receiving a standard diet. Group 2 followed the standard nutrition program with intermittent fasting (CG + IF). Group 3 underwent exercise with a standard diet (CG + E). Group 4 underwent both a standard diet with intermittent fasting and exercise (CG + IF + E). Group 5 was fed a high-fat diet (HFD). Group 6 received a high-fat diet with intermittent fasting (HFD + IF). Group 7 followed a high-fat diet with exercise (HFD + E). Group 8 underwent both a high-fat diet with intermittent fasting and exercise (HFD + IF + E). The study lasted for 8 weeks. Results: The results of the analysis show that lymphocyte cell levels in groups HFD + IF, HFD + IF, and HFD + IF + E were higher compared to groups CG-HFD (p < 0.05). Additionally, B lymphocyte and monocyte cell levels were higher in group HFD + IF + E compared to groups CG, CG + IF, and CG + IF + E, as well as CG, CG + IF, and CG + E, respectively. TNF-α levels were significantly higher in group HFD compared to the other groups. Furthermore, IL 10 levels were higher in group HFD + IF + E compared to the other groups. Conclusions: These findings indicate that moderate exercise and intermittent fasting, particularly in groups fed a high-fat diet, increased anti-inflammatory cytokine levels, and certain immune system cell counts, while decreasing pro-inflammatory cytokine levels.
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Affiliation(s)
- Nizamettin Günbatar
- Van School of Health, Van YuzuncuYıl University, 65090 Van, Turkey; (B.B.); (S.B.); (M.B.)
| | - Bahattin Bulduk
- Van School of Health, Van YuzuncuYıl University, 65090 Van, Turkey; (B.B.); (S.B.); (M.B.)
| | - Selver Bezgin
- Van School of Health, Van YuzuncuYıl University, 65090 Van, Turkey; (B.B.); (S.B.); (M.B.)
| | - Gökhan Oto
- Department of Pharmacology, Van YuzuncuYıl University, 65090 Van, Turkey;
| | - Fahri Bayıroğlu
- Faculty of Medicine, Department of Physiology, Yıldırım Beyazıt University, 06200 Ankara, Turkey;
| | - Mehmet Bulduk
- Van School of Health, Van YuzuncuYıl University, 65090 Van, Turkey; (B.B.); (S.B.); (M.B.)
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Lin R, Hu X, Chen S, Huang J. Sports Participation and Anti-Epidemic: Empirical Evidence on the Influence of Regular Physical Activity on the COVID-19 Pandemic in Mainland China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:10689. [PMID: 36078405 PMCID: PMC9517875 DOI: 10.3390/ijerph191710689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/18/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
This study aims to investigate the effects and influencing mechanisms of regular physical activity (RPA) on the COVID-19 pandemic. Daily data from 279 prefecture-level cities in mainland China were collected from 1 January to 17 March 2020. A two-way fixed-effects model was used to identify the causal relationship between physical activity and COVID-19, while also considering factors such as patterns of human behavior and socioeconomic conditions. The instrumental variable (IV) approach was applied to address potential endogeneity issues for a more accurate causal identification, and the mediating effect model was applied to examine the mechanisms of the influence of physical activity on the epidemic. We found that regular physical activity significantly improves individual immunity, which, in turn, leads to a reduction in the probability of being infected with COVID-19. Furthermore, we investigated the heterogeneity of the influence, finding that the negative impact of physical activity on the pandemic is more pronounced in the absence of adequate medical resources, strong awareness of prevention among residents, and fully implemented public health measures. Our results provide empirical evidence for the mechanisms of influence of physical activity on the pandemic. We would suggest that not only should physical activity be actively practiced during the pandemic, but also long-term regular exercise habits should be consciously cultivated to improve the ability of the individual immune system to better cope with sudden outbreaks of emerging infectious diseases.
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Affiliation(s)
- Ruofei Lin
- School of Economics and Management, Tongji University, Shanghai 200092, China
| | - Xiaoli Hu
- International College of Football, Tongji University, Shanghai 200092, China
| | - Shijun Chen
- School of Economics and Management, Tongji University, Shanghai 200092, China
| | - Junpei Huang
- School of Economics and Management, Tongji University, Shanghai 200092, China
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Li H, Cheong JPG. The Impact of the COVID-19 Pandemic on the Physical Fitness of Primary School Students in China Based on the Bronfenbrenner Ecological Theory. Front Psychol 2022; 13:896046. [PMID: 35846611 PMCID: PMC9278268 DOI: 10.3389/fpsyg.2022.896046] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 05/09/2022] [Indexed: 11/26/2022] Open
Abstract
After the outbreak of the COVID-19 pandemic, nation lockdown became an effective way to isolate the spread of the virus. Schools were postponed, students had to stay at home and opportunities for physical activity amongst school children were severely affected. This research sought to determine the impact of the pandemic on the physical fitness of primary school students. In total, 1,235 students from grades one to five in a primary school in Beijing took part in this research. Using the Chinese National Student Physical Fitness Standard as a guide, the students were subjected to BMI, vital capacity, 50 m sprint, sit and reach, timed rope-skipping, timed sit-ups, and 50m × 8 shuttle run measurements. These tests were administered once before and once after the lockdown period. The results showed that the overall physical fitness of the participants was better after the lockdown [p = 0.000, r = -0.14, 95% CI (-0.219, -0.061)]. Specifically, vital capacity, sit and reach, timed rope-skipping and timed sit-ups had improved after the lockdown. Meanwhile, 50m × 8 shuttle run dropped slightly but not significantly whereas 50 m sprint dropped sharply after the lockdown. The proportion of overweight and obese students increased, but the difference before and after the lockdown was small. It appeared that during the pandemic, through the intervention of many comprehensive factors, home-based fitness was normalized and promoted the healthy development of students.
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Affiliation(s)
- Hailing Li
- Centre for Sport and Exercise Sciences, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Jadeera Phaik Geok Cheong
- Centre for Sport and Exercise Sciences, Universiti Malaya, Kuala Lumpur, Malaysia
- UM STEM Centre, Universiti Malaya, Kuala Lumpur, Malaysia
- Pusat Kajian Kecemerlangan Melayu, Universiti Malaya, Kuala Lumpur, Malaysia
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Are Sports Champions Also Anti-Epidemic Heroes? Quantitative Research on the Influence of Sports Champions' Demonstration Effect on the COVID-19 Epidemic in China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19042438. [PMID: 35206626 PMCID: PMC8872107 DOI: 10.3390/ijerph19042438] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/13/2022] [Accepted: 02/17/2022] [Indexed: 02/06/2023]
Abstract
What kind of role do sports champions play in the COVID-19 epidemic? Do they contribute to the mitigation of the epidemic by some pathway? In this paper, we empirically explore the influence and mechanism of the demonstration effect of sports champions upon the COVID-19 epidemic using COVID-19-related dataset of prefecture-level cities in China from 1 January 2020 to 17 March 2020. The two-way fixed effect model of econometrics is applied to estimate the result, the instrumental variable approach is adopted to address potential endogeneity issues, and socio-economic factors including public health measures, residents’ self-protection awareness, effective distance from Wuhan are also taken into consideration. The results show that the demonstration effect of champions in major sporting events increases the participation in physical exercise, which in turn reduces the possibility of being infected with the epidemic. An increase of one gold medal results in a 0.93% increase in the sports population, then leads to a 3.58% decrease in the cumulative case growth rate (p < 0.01). Further, we find that the effect is greater in regions with developed economies and abundant sports resources. Interestingly, it is greater in regions with less attention to sports, which again confirms the role of the demonstration effect.
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Tarnowski M, Kopytko P, Piotrowska K. Epigenetic Regulation of Inflammatory Responses in the Context of Physical Activity. Genes (Basel) 2021; 12:1313. [PMID: 34573295 PMCID: PMC8465911 DOI: 10.3390/genes12091313] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/19/2021] [Accepted: 08/24/2021] [Indexed: 12/11/2022] Open
Abstract
Epigenetic modifications occur in response to environmental changes and play a fundamental role in the regulation of gene expression. PA is found to elicit an inflammatory response, both from the innate and adaptive divisions of the immunological system. The inflammatory reaction is considered a vital trigger of epigenetic changes that in turn modulate inflammatory actions. The tissue responses to PA involve local and general changes. The epigenetic mechanisms involved include: DNA methylation, histone proteins modification and microRNA. All of them affect genetic expression in an inflammatory milieu in physical exercise depending on the magnitude of physiological stress experienced by the exerciser. PA may evoke acute or chronic biochemical and physiological responses and have a positive or negative immunomodulatory effect.
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Affiliation(s)
- Maciej Tarnowski
- Department of Physiology, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (P.K.); (K.P.)
- Institute of Physical Culture Sciences, University of Szczecin, 70-453 Szczecin, Poland
| | - Patrycja Kopytko
- Department of Physiology, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (P.K.); (K.P.)
| | - Katarzyna Piotrowska
- Department of Physiology, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (P.K.); (K.P.)
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da Silveira MP, da Silva Fagundes KK, Bizuti MR, Starck É, Rossi RC, de Resende E Silva DT. Physical exercise as a tool to help the immune system against COVID-19: an integrative review of the current literature. Clin Exp Med 2021. [PMID: 32728975 DOI: 10.1007/s10238-020-00650-3/figures/4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Acute viral respiratory infections are the main infectious disease in the world. In 2020, a new disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), coronavirus disease 2019 (COVID-19), became a global pandemic. The immune response to the virus depends on factors such as genetics, age and physical state, and its main input receptor is the angiotensin-converting enzyme 2. The practice of physical exercises acts as a modulator of the immune system. During and after physical exercise, pro- and anti-inflammatory cytokines are released, lymphocyte circulation increases, as well as cell recruitment. Such practice has an effect on the lower incidence, intensity of symptoms and mortality in viral infections observed in people who practice physical activity regularly, and its correct execution must be considered to avoid damage. The initial response is given mainly by type I interferons (IFN-I), which drive the action macrophages and lymphocytes, followed by lymphocyte action. A suppression of the IFN-I response has been noted in COVID-19. Severe conditions have been associated with storms of pro-inflammatory cytokines and lymphopenia, as well as circulatory changes and virus dispersion to other organs. The practice of physical activities strengthens the immune system, suggesting a benefit in the response to viral communicable diseases. Thus, regular practice of adequate intensity is suggested as an auxiliary tool in strengthening and preparing the immune system for COVID-19. Further studies are needed to associate physical exercise with SARS-CoV-2 infection.
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Affiliation(s)
| | | | - Matheus Ribeiro Bizuti
- Federal University of Fronteira Sul, Campus Chapecó, SC 484 - KM 02, 89802-000, Chapecó, SC, Brazil
| | - Édina Starck
- Federal University of Fronteira Sul, Campus Chapecó, SC 484 - KM 02, 89802-000, Chapecó, SC, Brazil
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Islam MS, Chaudhuri I, Mobin MA, Islam M, Mahmud MS, KutubUddin M, Kabir KMA, Kamrujjaman M. The Perspective of Acquired Immunity to Combat against Infectious Diseases: An Overview. Health (London) 2021. [DOI: 10.4236/health.2021.139077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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8
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da Silveira MP, da Silva Fagundes KK, Bizuti MR, Starck É, Rossi RC, de Resende E Silva DT. Physical exercise as a tool to help the immune system against COVID-19: an integrative review of the current literature. Clin Exp Med 2020; 21:15-28. [PMID: 32728975 PMCID: PMC7387807 DOI: 10.1007/s10238-020-00650-3] [Citation(s) in RCA: 180] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/24/2020] [Indexed: 12/11/2022]
Abstract
Acute viral respiratory infections are the main infectious disease in the world. In 2020, a new disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), coronavirus disease 2019 (COVID-19), became a global pandemic. The immune response to the virus depends on factors such as genetics, age and physical state, and its main input receptor is the angiotensin-converting enzyme 2. The practice of physical exercises acts as a modulator of the immune system. During and after physical exercise, pro- and anti-inflammatory cytokines are released, lymphocyte circulation increases, as well as cell recruitment. Such practice has an effect on the lower incidence, intensity of symptoms and mortality in viral infections observed in people who practice physical activity regularly, and its correct execution must be considered to avoid damage. The initial response is given mainly by type I interferons (IFN-I), which drive the action macrophages and lymphocytes, followed by lymphocyte action. A suppression of the IFN-I response has been noted in COVID-19. Severe conditions have been associated with storms of pro-inflammatory cytokines and lymphopenia, as well as circulatory changes and virus dispersion to other organs. The practice of physical activities strengthens the immune system, suggesting a benefit in the response to viral communicable diseases. Thus, regular practice of adequate intensity is suggested as an auxiliary tool in strengthening and preparing the immune system for COVID-19. Further studies are needed to associate physical exercise with SARS-CoV-2 infection.
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Affiliation(s)
| | | | - Matheus Ribeiro Bizuti
- Federal University of Fronteira Sul, Campus Chapecó, SC 484 - KM 02, 89802-000, Chapecó, SC, Brazil
| | - Édina Starck
- Federal University of Fronteira Sul, Campus Chapecó, SC 484 - KM 02, 89802-000, Chapecó, SC, Brazil
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9
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Souza TSPD, Pfeiffer PADS, Pereira JDN, Pereira Neto EA, Dutra TS, Mendonça MGLD, Cirilo-Sousa MS. Immune System Modulation in Response to Strength Training With Blood Flow Restriction. J Strength Cond Res 2019; 36:2156-2161. [PMID: 31714452 DOI: 10.1519/jsc.0000000000003323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Souza, TSP, Pfeiffer, PAS, Pereira, JN, Pereira Neto, EA, Dutra, TS, Mendonça, MGL, and Cirilo-Sousa, MS. Immune system modulation in response to strength training with blood flow restriction. J Strength Cond Res XX(X): 000-000, 2019-This study aimed to compare the strength training with blood flow restriction (ST-BFR) to the multiple-set training at different intensities (30% of 1RM and 75% of 1RM) as for their effect on immunoinflammatory responses (total leukocytes, segmented neutrophils, lymphocytes, monocytes, and lymphocyte subpopulations). It is a randomized experimental study with a repeated measures design with inter and intragroup effects of a strength training session. Eighteen physically active adults aged 20-31 years (26.17 ± 3.7 years), apparently healthy, performed a strength training session with 2 exercises. Six milliliters of blood were collected before the training, immediately after the training, and at 30 minutes and 24 hours after the session to carry out the analyses. The results showed that the strength training could promote modulation (time effect) in the leukocyte count (F = 25.86, p < 0.01, η = 0.74), regardless of the method used. Neutrophils (F = 22.71, p < 0.01, η = 0.60), specifically the TCD4+ lymphocytes (F = 6.33, p < 0.05, η = 0, 3), were the main factors responsible for this variation. Despite the similarity, there were differences between the methods in the modulations of total leukocytes (F = 4.16, p < 0.05, η = 0.36) and neutrophils (F = 4.80, p < 0.05, η = 0.39). In conclusion, compared to the multiple-set training, ST-BFR produces immunoinflammatory responses similar to the low-intensity training and different from the high-intensity training. However, the demargination process of some cells was different depending on the method and intensity used. Nevertheless, these variations are compatible with an appropriate recovery process, because the amplitude and length of the modulation curves of leukocytes, and lymphocyte subpopulations were not compatible with immunosuppression.
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Affiliation(s)
- Thiago S P de Souza
- Physical Education Postgraduate Associate Program, Kinanthropometry and Human Performance Research Group, Federal University of Paraíba, João Pessoa, Brazil
| | - Patrick A de S Pfeiffer
- Physical Education Postgraduate Associate Program, Kinanthropometry and Human Performance Research Group, Federal University of Paraíba, João Pessoa, Brazil
| | - Jordan do N Pereira
- Kinanthropometry and Human Performance Research Group, Federal University of Paraíba, João Pessoa, Brazil
| | - Elisio A Pereira Neto
- Kinanthropometry and Human Performance Research Group, Federal University of Paraíba, João Pessoa, Brazil
| | - Thaysa S Dutra
- Kinanthropometry and Human Performance Research Group, Federal University of Paraíba, João Pessoa, Brazil
| | - Mayara G L de Mendonça
- Kinanthropometry and Human Performance Research Group, Federal University of Paraíba, João Pessoa, Brazil
| | - Maria S Cirilo-Sousa
- Physical Education Postgraduate Associate Program, Kinanthropometry and Human Performance Research Group, Federal University of Paraíba, João Pessoa, Brazil
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Melo BP, Pedro RE, Guariglia DA, Peres SB, Moraes SMFD. RESPOSTAS AGUDAS DO EXERCÍCIO FÍSICO EM PESSOAS INFECTADAS PELO HIV: UMA REVISÃO SISTEMÁTICA. REV BRAS MED ESPORTE 2017. [DOI: 10.1590/1517-869220172302158763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO O treinamento físico é uma estratégia importante para a saúde de pessoas que vivem com HIV/AIDS; contudo, suas respostas a curto prazo ainda não foram amplamente estudadas, o que limita o entendimento dos efeitos e da segurança da prescrição do treinamento para essa população. Portanto, objetivou-se revisar sistematicamente as respostas agudas decorrentes do exercício físico em pessoas com HIV sobre variáveis fisiológicas e imunológicas. Para isso, foi realizada uma revisão sistemática a partir de trabalhos indexados nas seguintes bases de dados: Medline, Lilacs, Scielo, Web of Science e Science Direct. Os descritores utilizados foram: acquired immunodeficiency syndrome, HIV, AIDS, seropositive, acute session, short, physical activity, exercise, training. As buscas foram realizadas em fevereiro de 2015 e atualizadas em dezembro de 2015 e foram conduzidas sem restrição de datas de publicação ou idioma específico. Foram incluídos para esta revisão artigos que avaliaram as respostas agudas decorrentes de algum modelo de prescrição de treinamento físico envolvendo exercícios aeróbicos, com pesos ou combinados (exercícios aeróbicos e com pesos) relacionados com variáveis fisiológicas e imunológicas em pessoas infectadas pelo HIV. Foram encontrados 2.422 títulos, dos quais, após exclusão das duplicatas e a aplicação dos critérios de elegibilidade, foram selecionados sete artigos para síntese qualitativa. De acordo com os resultados reportados pelos estudos há evidências de que, imediatamente após a realização do exercício físico, ocorre um aumento do número de células circulantes, incluindo leucócitos totais, neutrófilos, monócitos e linfócitos T CD8+ em pessoas infectadas pelo HIV. Além disso, também se observaram alterações significantes nas concentrações de lactato, triglicerídeos, epinefrina e norepinefrina imediatamente após a realização do treinamento aeróbico, independentemente do uso de TARV e/ou de hiperlactatemia. No entanto, não há evidências suficientes para afirmar que o treinamento físico seja totalmente seguro e eficaz para esta população.
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Delmondes GMB, Oliveira DCD, Santos PCPD, Viana MT, Santos MDSB, Castro CMMBD, Andrade MA. Efeito do treinamento físico moderado e intenso sobre os mecanismos de defesa de ratos adultos. MOTRIZ: REVISTA DE EDUCACAO FISICA 2012. [DOI: 10.1590/s1980-65742012000400008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJETIVO: Analisou-se o impacto do treinamento físico moderado (TFM) e intenso (TFI) sobre o perfil leucocitário e a atividade microbicida de macrófagos alveolares, em 29 ratos machos Wistar. MÉTODOS: Foram formados três grupos: controle-sedentário (CS), treino-moderado (TM) e treino-intenso (TI). Os TFM e TFI foram efetuados através da natação, com aumento progressivo de carga conforme o peso corporal, até um máximo de 3% para o TFM, e 5% para o TFI. As coletas de sangue para contagem total e diferencial dos leucócitos foram automatizadas através do analisador hematológico Sysmex XT- 1800i (Roche®) antes e após o treino. E ao final realizou-se o lavado broncoalveolar para determinar a taxa de fagocitose e a produção de óxido nítrico (ON) de macrófagos. RESULTADOS: O grupo TM apresentou valores maiores para o número de leucócitos (12,77±2,0 x 17,25±2,4 10³/mm³), linfócitos (8,87±1,0 x 12,5±2,1 10³/mm³) e neutrófilos (0,99±0,5 x 3,18±1,0 10³/mm³), p<0,05. Apresentou também uma maior produção de ON (15,77±4,9µmols/mL) e da taxa de fagocitose (38,6%±8,65) em relação ao CS (6,58±1,9µmols/mL e 24,4%±7,40, respectivamente). Enquanto que, o grupo TI apresentou menor taxa de fagocitose (13,1%±1,52 x 24,4%±7,40), maior produção de ON (38,40± 2,1x 6,58±1,9 µmols/mL) e aumento apenas, no valor dos neutrófilos (2,6±1,4x 0,99±0,5 10³/mm³) quando comparado ao CS, p<0,001. CONCLUSÕES: O TFM proporcionou melhora nos mecanismos de defesa dos animais adultos. Enquanto que o TFI reduziu a taxa de fagocitose o que poderá implicar em prejuízo da atividade microbicida dos animais.
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Affiliation(s)
| | | | | | - Marcelo Tavares Viana
- Universidade Federal de Pernambuco, Brasil; Universidade Federal de Pernambuco, Brasil
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12
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Terra R, Silva SAGD, Pinto VS, Dutra PML. Efeito do exercício no sistema imune: resposta, adaptação e sinalização celular. REV BRAS MED ESPORTE 2012. [DOI: 10.1590/s1517-86922012000300015] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
INTRODUÇÃO: Durante o último século, o homem tornou-se menos ativo fisicamente, adotando hábitos cada vez mais sedentários. Isto promoveu aumento na incidência de doenças crônicas tais como doenças cardiovasculares, diabetes do tipo 2 e síndrome metabólica. A prática de atividade física pode influenciar o estado de higidez alterando estados metabólicos e também o sistema imunológico. OBJETIVO: Revisar na literatura estudos que abordem os efeitos promovidos pelo exercício físico no desenvolvimento da resposta imunológica e suas possíveis vias de transdução de sinais. MÉTODOS: Foram consultadas as bases de dados SciELO e PubMed. RESULTADOS: A literatura disponível mostra que durante a prática de exercício, várias subpopulações de leucócitos são alteradas de acordo com a intensidade e duração da atividade desempenhada. Exercícios de intensidade moderada estimulam uma resposta pró-inflamatória, enquanto aqueles de alta intensidade tendem a promover respostas anti-inflamatórias visando diminuir os danos na musculatura esquelética. Tais alterações são vistas em células apresentadoras de antígeno (como macrófagos e células dendríticas), neutrófilos, células natural killers (NK) e em moléculas de superfície como os receptores do tipo Toll (TLR) e do complexo principal de histocompatibilidade de classe II (MHC II), além das modificações promovidas em todo o repertório de citocinas. CONCLUSÃO: O estado atual do conhecimento permite considerar que as alterações no sistema imune são dependentes dos parâmetros inerentes ao exercício e que para que todas estas alterações ocorram, algumas cascatas de sinalização celular são acionadas, dando origem a um complexo processo de fosforilação/desfosforilação que culmina em ativação de fatores de transcrição, tradução de RNAm, síntese proteica e proliferação celular.
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Nery CDS, Pinheiro IL, Muniz GDS, Vasconcelos DAAD, França SPD, Nascimento ED. Medidas murinométricas e eficiência alimentar em ratos provenientes de ninhadas reduzidas na lactação e submetidos ou não ao exercício de natação. REV BRAS MED ESPORTE 2011. [DOI: 10.1590/s1517-86922011000100010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
INTRODUÇÃO: Excesso de alimentação no início da vida pode modificar persistentemente consumo e peso corporal. Adoção de exercício físico é uma estratégia útil para evitar excessivo ganho de peso. OBJETIVO: Avaliar o crescimento corporal e a eficiência alimentar em ratos provenientes de ninhada reduzida no aleitamento. MÉTODOS: Ao terceiro dia de vida, ninhadas foram formadas com quatro (GN4) ou 10 animais (GN10), (n = 25). Ao desmame, ratos machos Wistar permaneceram em gaiolas individuais, e, aos 60 (± 2) dias foram subdivididos em sedentários (SED) e exercitados (NAT), formando quatro grupos: GN4SED, GN10SED, GN4-NAT e GN10NAT. Avaliou-se o peso, ganho de peso e taxa específica de ganho de peso, gordura epididimal, índices de massa corporal e Lee, consumo e eficiência alimentar, glicemia e lactemia. RESULTADOS: Aos 21 dias, o GN4 apresentava peso corporal 52% acima do GN10 (P = 0,001). Contudo, aos 30 e 60 dias os pesos não diferiram. Ao final do período, GN10NAT demonstrou menor peso (356,82 ± 23,04) que GN10SED (409,28 ± 17,30). Mas GN4NAT possuía maior peso (417,85 ± 37,91) que GN4SED (413,69 ± 57,45) e GN10NAT. O GN4 exibiu elevada taxa de ganho de peso na lactação, mas, redução da mesma pós-desmame. Independente do tamanho da ninhada, a taxa de ganho de peso reduz com o aumento da idade. Ao final do período, glicemia, gordura epididimal total e relativa, e os índices de Lee e IMC não diferiram entre os grupos. Os valores de lactato antes e após o exercício condizem com esforço de intensidade moderada. Na periadolescência, GN4 apresentou menor ingestão de alimentos, mas sem diferenças na vida adulta. CONCLUSÃO: A redução da ninhada no aleitamento não alterou o peso corporal ou ingestão alimentar persistentemente. Entretanto, o protocolo de natação foi eficaz em reduzir o ganho de peso em animais controles, mas não naqueles de ninhada reduzida.
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Silva RPD, Natali AJ, Paula SOD, Locatelli J, Marins JCB. Imunoglobulina A salivar (IgA-s) e exercício: relevância do controle em atletas e implicações metodológicas. REV BRAS MED ESPORTE 2009. [DOI: 10.1590/s1517-86922009000700012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
O objetivo do presente estudo é realizar uma análise e discussão dos principais achados envolvendo o comportamento da imunoglobulina A salivar (IgA-s) em relação ao estímulo do exercício e evidenciar a importância de seu controle em atletas. O exercício físico é um importante modulador das características do sistema imune, sobretudo do comportamento da IgA-s, componente fundamental na proteção de infecções do trato respiratório superior (ITRS). No entanto, a relação direta entre baixas concentrações de IgA-s e ITRS precisa de mais evidências para ser confirmada. As concentrações de IgA-s durante e logo após um exercício intenso diminuem, deixando o indivíduo mais suscetível à infecção, porém, atletas envolvidos em atividades extenuantes não são clinicamente imunodeficientes, comparados com indivíduos sedentários. Essas modificações são transitórias, com retorno aos valores normais após aproximadamente 48 horas de repouso. A razão dessas alterações não é clara, mas se apresenta multifatorial: elevação de hormônios estressores; fatores nutricionais; ação de espécies reativas de oxigênio; e estresse psicológico. Apesar do efeito transitório das alterações provocadas nos elementos do sistema imune frente ao exercício, observa-se diferença na variabilidade da IgA-s em populações com diferentes níveis de condicionamento. Diferenças metodológicas - como o protocolo de exercício, o método de coleta, armazenamento e manipulação da saliva, a forma de expressão da IgA-s, o nível de hidratação, o controle da dieta, a sazonalidade do período de competição, a aclimatação entre outros fatores - devem ser levadas em consideração para comparação entre os estudos. Além disso, ajudam a explicar, em parte, os resultados adversos envolvendo exercício moderado e os intermitentes, em que se encontram aumento, redução e até ausência de alteração nos níveis de IgA-s. Investigações de elementos inovadores, como os toll-like receptors, e o avanço tecnológico podem colaborar para aumentar as evidências sobre o tema.
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Leandro CG, Amorim MF, Hirabara SM, Curi R, Castro RMD. Pode a atividade física materna modular a programação fetal induzida pela nutrição? REV NUTR 2009. [DOI: 10.1590/s1415-52732009000400011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Existe considerável evidência para a indução de diferentes fenótipos em reposta às variações no ambiente fetal e neonatal. O aporte inadequado de nutrientes no período crítico do desenvolvimento está associado ao risco alto de doenças metabólicas na vida adulta, este fenômeno biológico é chamado de programação. A atividade física durante a gestação resulta em adaptações fisiológicas da mãe e no aumento da disponibilidade de nutrientes e oxigênio no espaço feto-placentário. Este trabalho tem como objetivo discutir os mecanismos da indução de programação fetal pela nutrição e o provável efeito modulador da atividade física durante a gestação. Foram utilizadas as bases de dados do Medline Pubmed, Lilacs e Bireme, com publicações entre 1990 até 2008. Os termos de indexação utilizados foram: nutrition, fetal programming, gestation, physical activity, physical exercise, metabolism. Em conclusão, o aporte inadequado de nutrientes programa o aparecimento de doenças metabólicas na vida adulta, enquanto que a atividade física durante a gestação aumenta a disponibilidade de nutrientes e oxigênio, repercutindo positivamente no crescimento fetal e no peso ao nascer.
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Affiliation(s)
| | | | | | - Rui Curi
- Universidade de São Paulo, Brasil
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