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Ribeiro MC, Silva AD, Giordani MA, Lira C, Luvizotto RDAM, Nascimento AF, Queiroz DD, Dekker RFH, Barbosa‐Dekker AM, de Queiroz EAI. Extended treatment with (1→3)(1→6)‐β‐
d
‐glucan (Botryosphaeran) reduces obesity and its comorbidities in high‐fat/high‐sugar diet‐fed rats. Cell Biochem Funct 2022; 40:773-783. [DOI: 10.1002/cbf.3743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 07/13/2022] [Accepted: 08/29/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Mariana Costa Ribeiro
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop Universidade Federal de Mato Grosso Sinop Mato Grosso Brazil
| | - Amadeu Zattoni da Silva
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop Universidade Federal de Mato Grosso Sinop Mato Grosso Brazil
| | - Morenna Alana Giordani
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop Universidade Federal de Mato Grosso Sinop Mato Grosso Brazil
| | - Cleberson Lira
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop Universidade Federal de Mato Grosso Sinop Mato Grosso Brazil
| | - Renata de A. M. Luvizotto
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop Universidade Federal de Mato Grosso Sinop Mato Grosso Brazil
| | - André F. Nascimento
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop Universidade Federal de Mato Grosso Sinop Mato Grosso Brazil
| | - Diogo Albino de Queiroz
- Gerência de Administração e Planejamento, Câmpus Universitário de Sinop Universidade Federal de Mato Grosso Sinop Mato Grosso Brazil
- Escola Técnica Estadual de Educação Profissional e Tecnológica Unidade de Sinop Sinop Mato Grosso Brazil
| | - Robert F. H. Dekker
- Beta‐Glucan Produtos Farmoquímicos EIRELI, Lote 24A, Bloco Zircônia, Universidade Tecnológica Federal do Paraná Câmpus Londrina Londrina Paraná Brazil
| | - Aneli M. Barbosa‐Dekker
- Beta‐Glucan Produtos Farmoquímicos EIRELI, Lote 24A, Bloco Zircônia, Universidade Tecnológica Federal do Paraná Câmpus Londrina Londrina Paraná Brazil
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Silva NA, Pereira BG, Santos JA, Guarnier FA, Barbosa-Dekker AM, Dekker RFH, Kassuya CAL, Bernardes SS. Oral administration of botryosphaeran [(1 → 3)(1 → 6)-β-d-glucan] reduces inflammation through modulation of leukocytes and has limited effect on inflammatory nociception. Cell Biochem Funct 2022; 40:578-588. [PMID: 35788958 DOI: 10.1002/cbf.3727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 06/13/2022] [Indexed: 11/11/2022]
Abstract
Several biological activities of the fungal exopolysaccharide (1 → 3)(1 → 6)-β-d-glucan (botryosphaeran) have been described in the literature, but its effects on inflammation have not been evaluated. This study aimed to investigate the action of botryosphaeran on experimental mice models of carrageenan-induced acute pleurisy and acute paw edema, and complete Freund's adjuvant-induced persistent paw edema. All botryosphaeran doses tested (1.0, 2.5, 5.0, and 10.0 mg/kg birth weight [b.w.], orally administered) reduced leukocyte recruitment, nitric oxide (NO) levels, and protein extravasation in the pleural cavity. Botryosphaeran (5 mg/kg b.w.) did not diminish edema and mechanical hyperalgesia in the paw within 4 h; however, cold allodynia was alleviated within the first 2 h. In the persistent paw inflammation model, the effects of daily oral administration of botryosphaeran (5 mg/kg b.w.) were evaluated over 3 and 7 days. The fungal β-glucan significantly reduced the levels of the cytokines, tumor necrosis factor(TNF)-α, interleukin (IL)-6), and IL-10, in the paw homogenates in both protocols, while paw edema and the levels of advanced oxidation protein products (AOPP) only diminished on Day 7. No effect in mechanical hyperalgesia was observed. Oral treatment for 3 or 7 days also decreased the plasma levels of NO, AOPP, TNF-α, and IL-10. On Day 7, the number of leukocytes in the blood was also reduced by this treatment. Importantly, botryosphaeran did not induce inflammation in mice when administered alone over 7 days. This study demonstrated the anti-inflammatory and antinociceptive potential of botryosphaeran in these experimental models, making this fungal β-glucan a new possibility for complementary treating acute and chronic inflammation.
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Affiliation(s)
- Nubia A Silva
- Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados, Dourados, Mato Grosso do Sul, Brazil
| | - Bianca G Pereira
- Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados, Dourados, Mato Grosso do Sul, Brazil
| | - Joyce A Santos
- Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados, Dourados, Mato Grosso do Sul, Brazil
| | - Flávia A Guarnier
- Departamento de Patologia Geral, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Aneli M Barbosa-Dekker
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.,Beta-Glucan Produtos Farmoquímicos EIRELI, Lote 24A, Bloco Zircônia, Universidade Tecnológica Federal do Paraná, Londrina, Paraná, Brazil
| | - Robert F H Dekker
- Beta-Glucan Produtos Farmoquímicos EIRELI, Lote 24A, Bloco Zircônia, Universidade Tecnológica Federal do Paraná, Londrina, Paraná, Brazil
| | - Cândida A L Kassuya
- Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados, Dourados, Mato Grosso do Sul, Brazil
| | - Sara S Bernardes
- Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados, Dourados, Mato Grosso do Sul, Brazil
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Hegde M, Daimary UD, Girisa S, Kumar A, Kunnumakkara AB. Tumor cell anabolism and host tissue catabolism-energetic inefficiency during cancer cachexia. Exp Biol Med (Maywood) 2022; 247:713-733. [PMID: 35521962 DOI: 10.1177/15353702221087962] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Cancer-associated cachexia (CC) is a pathological condition characterized by sarcopenia, adipose tissue depletion, and progressive weight loss. CC is driven by multiple factors such as anorexia, excessive catabolism, elevated energy expenditure by growing tumor mass, and inflammatory mediators released by cancer cells and surrounding tissues. In addition, endocrine system, systemic metabolism, and central nervous system (CNS) perturbations in combination with cachexia mediators elicit exponential elevation in catabolism and reduced anabolism in skeletal muscle, adipose tissue, and cardiac muscle. At the molecular level, mechanisms of CC include inflammation, reduced protein synthesis, and lipogenesis, elevated proteolysis and lipolysis along with aggravated toxicity and complications of chemotherapy. Furthermore, CC is remarkably associated with intolerance to anti-neoplastic therapy, poor prognosis, and increased mortality with no established standard therapy. In this context, we discuss the spatio-temporal changes occurring in the various stages of CC and highlight the imbalance of host metabolism. We provide how multiple factors such as proteasomal pathways, inflammatory mediators, lipid and protein catabolism, glucocorticoids, and in-depth mechanisms of interplay between inflammatory molecules and CNS can trigger and amplify the cachectic processes. Finally, we highlight current diagnostic approaches and promising therapeutic interventions for CC.
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Affiliation(s)
- Mangala Hegde
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India.,DBT-AIST International Center for Translational and Environmental Research, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India
| | - Uzini Devi Daimary
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India.,DBT-AIST International Center for Translational and Environmental Research, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India
| | - Sosmitha Girisa
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India.,DBT-AIST International Center for Translational and Environmental Research, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India
| | - Aviral Kumar
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India.,DBT-AIST International Center for Translational and Environmental Research, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India
| | - Ajaikumar B Kunnumakkara
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India.,DBT-AIST International Center for Translational and Environmental Research, Indian Institute of Technology-Guwahati, Guwahati 781039, Assam, India
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4
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da Silva TP, Geraldelli D, Martins KO, Braga AJL, Rosa AP, Ferneda JMDA, Bomfim GF, Barbosa-Dekker ADM, Dekker RFH, Dias MC, Paim NP, Sinhorin VDG, de Queiroz EAIF. Antioxidant, anti-inflammatory and beneficial metabolic effects of botryosphaeran [(1→3)(1→6)-β-d-glucan] are responsible for its anti-tumour activity in experimental non-obese and obese rats bearing Walker-256 tumours. Cell Biochem Funct 2022; 40:213-227. [PMID: 35229356 DOI: 10.1002/cbf.3690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/20/2022] [Accepted: 01/26/2022] [Indexed: 12/11/2022]
Abstract
Botryosphaeran, a (1→3)(1→6)-β-d-glucan, presents several beneficial activities, such as antiproliferative, hypoglycemic and antitumoural activities. This study evaluated the effects of botryosphaeran on oxidative stress, inflammation and metabolic activities in Walker-256 tumour-bearing non-obese and obese rats. Wistars rats were divided into four groups: control tumour (CT); control tumour + botryosphaeran (CTB); obese tumour (OT), and obese tumour + botryosphaeran (OTB). In ninth week, obese and non-obese rats were inoculated with 1 × 107 Walker-256 tumour cells and treated with botryosphaeran (30 mg/kg/d for 15 days). In 11th week, the following parameters were evaluated glycogen, glucose and lactate levels, pro-oxidant (TBARS) and antioxidant markers (superoxide dismutase [SOD]; catalase [CAT]; glutathione-S-transferase [GST]; reduced glutathione [GSH]; vitamin C) and cytokines. Obesity presented oxidative stress and inflammation, as demonstrated by high levels of TBARS, SOD and TNF-α, and lower levels of CAT, GSH and interleukin-10 (IL-10). Botryosphaeran significantly decreased TBARS and TNF-α and increased GST, GSH, vitamin C and IL-10 in the liver; increased SOD and vitamin C in tumour tissue; decreased TBARS in adipose tissue, and notably decreased the levels of glycogen and lactate in the tumour of CTB rats. Botryosphaeran promoted significant antioxidant, anti-inflammatory, and beneficial metabolic effects in Walker-256 tumour-bearing non-obese and obese rats, which contributed to its antitumour activity.
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Affiliation(s)
- Thais Pereira da Silva
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Programa de Pós-Graduação Ciências em Saúde, Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | - Danielli Geraldelli
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Programa de Pós-Graduação Ciências em Saúde, Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | - Kamila Ortega Martins
- Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | - Ana Júlia Lopes Braga
- Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | - Andrielli Pompermayer Rosa
- Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | | | - Gisele Facholi Bomfim
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Programa de Pós-Graduação Ciências em Saúde, Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | - Aneli de Melo Barbosa-Dekker
- Beta-Glucan Produtos Farmoquímicos EIRELI, Lote 24A, Bloco Zircônia, Universidade Tecnológica Federal do Paraná, Câmpus Londrina, Londrina, Brazil
| | - Robert F H Dekker
- Beta-Glucan Produtos Farmoquímicos EIRELI, Lote 24A, Bloco Zircônia, Universidade Tecnológica Federal do Paraná, Câmpus Londrina, Londrina, Brazil
| | - Marcos Correa Dias
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Programa de Pós-Graduação Ciências em Saúde, Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | - Neiva Pereira Paim
- Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | - Valéria Dornelles Gindri Sinhorin
- Programa de Pós-Graduação em Ciências Ambientais, Instituto de Ciências Naturais, Humanas e Sociais, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
| | - Eveline Aparecida Isquierdo Fonseca de Queiroz
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Programa de Pós-Graduação Ciências em Saúde, Instituto de Ciências da Saúde, Universidade Federal de Mato Grosso, Câmpus Universitário de Sinop, Sinop, Brazil
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5
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Wouk J, Dekker RFH, Queiroz EAIF, Barbosa-Dekker AM. β-Glucans as a panacea for a healthy heart? Their roles in preventing and treating cardiovascular diseases. Int J Biol Macromol 2021; 177:176-203. [PMID: 33609583 DOI: 10.1016/j.ijbiomac.2021.02.087] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 02/04/2021] [Accepted: 02/12/2021] [Indexed: 02/07/2023]
Abstract
Cardiovascular diseases (CVDs) are the leading cause of death worldwide. Factors increasing the risks for CVD development are related to obesity, diabetes, high blood cholesterol, high blood pressure and lifestyle. CVD risk factors may be treated with appropriate drugs, but prolonged can use cause undesirable side-effects. Among the natural products used in complementary and alternative medicines, are the β-ᴅ-glucans; biopolymers found in foods (cereals, mushrooms), and can easily be produced by microbial fermentation. Independent of source, β-glucans of the mixed-linked types [(1 → 3)(1 → 6)-β-ᴅ-glucans - fungal, and (1 → 3)(1 → 4)-β-ᴅ-glucans - cereal] have widely been studied because of their biological activities, and have demonstrated cardiovascular protective effects. In this review, we discuss the roles of β-ᴅ-glucans in various pathophysiological conditions that lead to CVDs including obesity, dyslipidemia, hyperglycemia, oxidative stress, hypertension, atherosclerosis and stroke. The β-glucans from all of the sources cited demonstrated potential hypoglycemic, hypocholesterolemic and anti-obesogenicity activities, reduced hypertension and ameliorated the atherosclerosis condition. More recently, β-glucans are recognized as possessing prebiotic properties that modulate the gut microbiome and impact on the health benefits including cardiovascular. Overall, all the studies investigated unequivocally demonstrated the dietary benefits of consuming β-glucans regardless of source, thus constituting a promising panaceutical approach to reduce CVD risk factors.
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Affiliation(s)
- Jéssica Wouk
- Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Estadual do Centro-Oeste, Campus CEDETEG, CEP: 85040-167, Guarapuava, Paraná, Brazil
| | - Robert F H Dekker
- Universidade Tecnológica Federal do Paraná, Programa de Pós-Graduação em Engenharia Ambiental, Câmpus Londrina, CEP: 86036-370 Londrina, Paraná, Brazil; Beta-Glucan Produtos Farmoquímicos - EIRELI, Avenida João Miguel Caram 731, Lote 24(A), Bloco Zircônia, Universidade Tecnológica Federal do Paraná, CEP: 86036-700 Londrina, Paraná, Brazil.
| | - Eveline A I F Queiroz
- Núcleo de Pesquisa e Apoio Didático em Saúde, Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78.557-267 Sinop, Mato Grosso, Brazil
| | - Aneli M Barbosa-Dekker
- Beta-Glucan Produtos Farmoquímicos - EIRELI, Avenida João Miguel Caram 731, Lote 24(A), Bloco Zircônia, Universidade Tecnológica Federal do Paraná, CEP: 86036-700 Londrina, Paraná, Brazil
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6
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Geraldelli D, Ribeiro MC, Medeiros TC, Comiran PK, Martins KO, Oliveira MF, Oliveira GA, Dekker RFH, Barbosa-Dekker AM, Alegranci P, Queiroz EAIF. Botryosphaeran, a (1 → 3)(1 → 6)-β-D-glucan, reduces tumor development and cachexia syndrome in obese male rats by increasing insulin sensitivity and FOXO3a activity. Int J Biol Macromol 2020; 165:985-994. [PMID: 32991890 DOI: 10.1016/j.ijbiomac.2020.09.168] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/02/2020] [Accepted: 09/20/2020] [Indexed: 12/28/2022]
Abstract
Obesity is an important risk factor in tumor development. Botryosphaeran, a (1 → 3)(1 → 6)-β-D-glucan, produced by the fungus Botryosphaeria rhodina (MAMB-05), is a high molecular mass, water-soluble exopolysaccharide. It consists of a main chain of (1 → 3)-linked β-d-glucose units, with a degree of branching of ~22% at carbon-6 with glucose and gentiobiose residues linked through β-(1 → 6)-bonds, and presents a triple helix conformation. Botryosphaeran presents anticlastogenic, antiproliferative, pro-apoptotic and anti-obesogenic activities. This study evaluated the effects of botryosphaeran on tumor development in obesity and analyzed its mechanism of action. Obesity was induced in male Wistar rats by a high-fat/high-sugar diet. After 9 weeks, rats were divided into two groups: Obese Tumor (OT) and Obese Tumor Botryosphaeran (OTB), and inoculated with 1 × 107 Walker-256 tumor cells, and treatment with botryosphaeran (30 mg/kg b.w./day via gavage for 15 days) commenced. On the 11th week, biological parameters, tumor development, metabolic profile, erythrogram and protein expression were evaluated. Botryosphaeran significantly reduced tumor growth, body-weight loss and cachexia. Furthermore, botryosphaeran decreased mesenteric fat and insulin resistance, corrected macrocytic anemia, and increased Forkhead transcription factor-3a (FOXO3a) activity. Our study demonstrated the potential role of botryosphaeran in the management of cancer in tumor-bearing obese rats by increasing insulin sensitivity and FOXO3a activity.
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Affiliation(s)
- Danielli Geraldelli
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil
| | - Mariana C Ribeiro
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil
| | - Túlio C Medeiros
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil
| | - Patrícia K Comiran
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil
| | - Kamila O Martins
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil
| | - Matheus F Oliveira
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil
| | - Gabriela A Oliveira
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil
| | - Robert F H Dekker
- Universidade Tecnológica Federal do Paraná, Programa de Pós-Graduação em Engenharia Ambiental, Câmpus Londrina, CEP: 86036-370 Londrina, PR, Brazil
| | - Aneli M Barbosa-Dekker
- Departamento de Química - CCE, Universidade Estadual de Londrina, CEP: 85503-390 Londrina, PR, Brazil
| | - Pâmela Alegranci
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil
| | - Eveline A I F Queiroz
- Núcleo de Pesquisa e Apoio Didático em Saúde (NUPADS), Instituto de Ciências da Saúde, Câmpus Universitário de Sinop, Universidade Federal de Mato Grosso, CEP: 78550-728 Sinop, MT, Brazil.
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