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Nugraha RYB, Jeelani G, Nozaki T. Physiological roles and metabolism of γ-aminobutyric acid (GABA) in parasitic protozoa. Trends Parasitol 2022; 38:462-477. [DOI: 10.1016/j.pt.2022.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 01/20/2022] [Accepted: 02/04/2022] [Indexed: 11/16/2022]
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Adebiyi OE, Omobowale TO, Abatan MO. Neurocognitive domains and neuropathological changes in experimental infection with Trypanosoma brucei brucei in Wistar rats. Heliyon 2021; 7:e08260. [PMID: 34765779 PMCID: PMC8571699 DOI: 10.1016/j.heliyon.2021.e08260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/29/2021] [Accepted: 10/22/2021] [Indexed: 01/05/2023] Open
Abstract
Trypanosoma brucei brucei causes animal trypanosomiasis in several vertebrates and human African trypanosomiasis. Previous studies have only explored the incidence, clinical symptoms, haematology and biochemical changes associated with the disease. The behavioral manipulation hypothesis posits that parasites alter the behavior of host to increase the reproductive abilities of such parasites. Hence, the present study was carried out to investigate changes in behavior and cognition following experimental infection of T. brucei brucei in rat model. This study involved two groups of animals (uninfected control and T. brucei infected) with 8 rats per group. After confirmation of parasitaemia in the infected rats both groups were assessed to investigate if infection led to behavioral alterations and neuropathological changes using the open field, social interaction and forelimb suspension tests. Immunohistochemistry was performed on brain tissues using glial fibrillary acidic protein and anticalbindin-D28k, antibodies. We demonstrated that T. brucei infection triggered a significant decrease in exploratory activity, anxiety-like behavior, altered recognition of social novelty and reduced hanging latency in the hanging wire test. Immunohistochemistry revealed significant astrocytosis, loss of dendritic spines and reduction of Purkinje cell layer of the cerebellum. These results demonstrate that T. brucei infection induce signs of anxiety, impaired motor co-ordination with degeneration and loss of Purkinje cells.
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Affiliation(s)
| | | | - Mathew Oluwole Abatan
- Department of Veterinary Pharmacology and Toxicology, University of Ibadan, Ibadan, Nigeria
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Singh SK, Singh VK, Kumari P, Nakade UP, Garg SK. Trypanosoma evansi induces detrimental immuno-catabolic alterations and condition like type-2 diabetes in buffaloes. Parasitol Int 2017; 67:140-143. [PMID: 29100925 DOI: 10.1016/j.parint.2017.10.015] [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: 03/24/2017] [Revised: 10/31/2017] [Accepted: 10/31/2017] [Indexed: 10/18/2022]
Abstract
The present study aimed to investigate the perturbations in immuno-metabolic and redox status of buffaloes with trypanosomosis. Thirteen buffaloes suffering from clinical trypanosomosis and eight apparently healthy buffaloes were included in the present study. Buffaloes with trypanosomosis found to have markedly elevated levels of interleukin-10 (IL-10), nonesterified fatty acids (NEFA) and beta-hydroxybutyrate (BHBA) in comparison with healthy controls. Whereas, total antioxidant capacity (TAC) and haemoglobin levels of buffaloes with trypanosomosis were significantly lower than the healthy controls. Remarkable elevation in malondialdehyde (MDA) and protein carbonyls (PC) levels were also observed in the diseased buffaloes. Moreover, buffaloes with trypanosomosis were found to have markedly elevated levels of serum glucose, total proteins, globulins, urea and aspartate aminotransferase (AST) and markedly lowered levels of serum calcium, total cholesterol levels and albumin/globulin (A/G) ratio as compared to the controls. Findings of our study evidently suggest that Trypanosoma evansi induces remarkable immunosuppressive and pro-oxidative status with an increased catabolic activity and hyperglycemic condition like type-2 diabetes in naturally infected buffaloes. Therefore, immuno-metabolic and pro-oxidative predicaments should be addressed by the veterinary clinician while managing the clinical cases of trypanosomosis in buffaloes.
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Affiliation(s)
- Shanker K Singh
- Department of Veterinary Medicine, College of Veterinary Science and Animal Husbandry, DUVASU, Mathura, Uttar Pradesh 281 001, India.
| | - Vivek K Singh
- Department of Veterinary Medicine, College of Veterinary Science and Animal Husbandry, DUVASU, Mathura, Uttar Pradesh 281 001, India
| | - Priyambada Kumari
- College of Biotechnology, DUVASU, Mathura, Uttar Pradesh 281 001, India
| | - Udayraj P Nakade
- Department of Pharmacology and Toxicology, College of Veterinary Science and Animal Husbandry, DUVASU, Mathura, Uttar Pradesh 281 001, India
| | - Satish K Garg
- Department of Pharmacology and Toxicology, College of Veterinary Science and Animal Husbandry, DUVASU, Mathura, Uttar Pradesh 281 001, India
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Baldissera MD, Souza CF, Carmo GM, Monteiro SG, Mendes RE, Stefani LM, da Silva AS. Relation between acetylcholinesterase and Na +, K +-ATPase activities with impaired memory of mice experimentally infected by Trypanosoma cruzi. Microb Pathog 2017; 111:75-80. [PMID: 28823791 DOI: 10.1016/j.micpath.2017.08.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Revised: 08/09/2017] [Accepted: 08/16/2017] [Indexed: 12/29/2022]
Abstract
Chagas disease is caused by the protozoan parasite Trypanosoma cruzi and causes severe cardiac and brain damage, leading to behavioral alterations in humans and animals. However, the mechanisms involved in memory impairment during T. cruzi infection remain unknown. It has long been recognized that the enzymatic activities of acetylcholinesterase (AChE) and Na+, K+-ATPase are linked with memory dysfunction during other trypanosomiasis. Thus, the aim of this study was to evaluate the involvement of cerebral AChE and Na+, K+-ATPase activities in the memory impairment during T. cruzi (Colombian strain) infection. A significant decrease on latency time during the inhibitory avoidance task was observed in animals infected by T. cruzi compared to uninfected animals, findings compatible to memory dysfunction. Moreover, the cerebral AChE activity increased, while the Na+, K+-ATPase decreased in T. cruzi infected compared to uninfected animals. Histopathology revealed mild to moderate multifocal gliosis in the cerebral cortex and light focal meningeal lymphoplasmacytic infiltrate, which may have contributed to memory loss. Based on these evidences, we can conclude that T. cruzi (Colombian strain) causes memory impairment in mice experimentally infected. Moreover, the changes in AChE and Na+, K+-ATPase activities may be considered a mechanism involved in disease pathogenesis.
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Affiliation(s)
- Matheus D Baldissera
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Carine F Souza
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Guilherme M Carmo
- Graduate Program in Toxicological Biochemistry (UFSM), Santa Maria, RS, Brazil
| | - Silvia G Monteiro
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Ricardo E Mendes
- Laboratory of Pathology, Instituto Federal Catarinense (IFC), Concórdia, SC, Brazil
| | - Lenita M Stefani
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, SC, Brazil
| | - Aleksandro S da Silva
- Graduate Program in Toxicological Biochemistry (UFSM), Santa Maria, RS, Brazil; Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, SC, Brazil.
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Demodex canis regulates cholinergic system mediated immunosuppressive pathways in canine demodicosis. Parasitology 2017; 144:1412-1416. [PMID: 28583218 DOI: 10.1017/s0031182017000774] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Demodex canis infestation in dogs remains one of the main challenges in veterinary dermatology. The exact pathogenesis of canine demodicosis is unknown but an aberration in immune status is considered very significant. No studies have underpinned the nexus between induction of demodicosis and neural immunosuppressive pathways so far. We have evaluated the involvement of cholinergic pathways in association with cytokines regulation as an insight into the immuno-pathogenesis of canine demodicosis in the present study. Remarkable elevations in circulatory immunosuppressive cytokine interleukin-10 and cholinesterase activity were observed in dogs with demodicosis. Simultaneously, remarkable reduction in circulatory pro-inflammatory cytokine tumour necrosis factor-alpha level was observed in dogs with demodicosis. Findings of the present study evidently suggest that Demodex mites might be affecting the cholinergic pathways to induce immunosuppression in their host and then proliferate incessantly in skin microenvironment to cause demodicosis.
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Nerolidol-loaded nanospheres prevent behavioral impairment via ameliorating Na +, K +-ATPase and AChE activities as well as reducing oxidative stress in the brain of Trypanosoma evansi-infected mice. Naunyn Schmiedebergs Arch Pharmacol 2016; 390:139-148. [PMID: 27807596 DOI: 10.1007/s00210-016-1313-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 10/19/2016] [Indexed: 01/24/2023]
Abstract
The aim of this study was to investigate the effect of nerolidol-loaded nanospheres (N-NS) on the treatment of memory impairment caused by Trypanosoma evansi in mice, as well as oxidative stress, and Na+, K+-ATPase and acetylcholinesterase (AChE) activities in brain tissue. Animals were submitted to behavioral tasks (inhibitory avoidance task and open-field test) 4 days postinfection (PI). Reactive oxygen species (ROS) and thiobarbituric acid-reactive substance (TBARS) levels and catalase (CAT), superoxide dismutase (SOD), Na+, K+-ATPase and AChE activities were measured on the fifth-day PI. T. evansi-infected mice showed memory deficit, increased ROS and TBARS levels and SOD and AChE activities, and decreased CAT and Na+, K+-ATPase activities compared to uninfected mice. N-NS prevented memory impairment and oxidative stress parameters (except SOD activity), while free nerolidol (N-F) restored only CAT activity. Also, N-NS treatment was able to prevent alterations in Na+, K+-ATPase and AChE activities caused by T. evansi infection. A significantly negative correlation was observed between memory and ROS production (p < 0.001; r = -0.941), as well as between memory and AChE activity (p < 0.05; r = -0.774). On the contrary, a significantly positive correlation between memory and Na+, K+-ATPase activity was observed (p < 0.01; r = 0.844). In conclusion, N-NS was able to reverse memory impairment and to prevent increased ROS and TBARS levels due to amelioration of Na+, K+-ATPase and AChE activities and to activation of the antioxidant enzymes, respectively. These results suggest that N-NS treatment may be a useful strategy to treat memory dysfunction and oxidative stress caused by T. evansi infection.
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Baldissera MD, Sagrillo MR, de Sá MF, Peroza LR, Posser CP, de Brum GF, Peres DS, De Mello ALB, Ferrão M, Souza CF, da Silva AS, Monteiro SG. Increased in cyclooxygenase—2 immunoreactivity and DNA damage in hippocampus of rats infected by Trypanosoma evansi. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s00580-016-2235-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Baldissera MD, Vaucher RA, Oliveira CB, Rech VC, Sagrillo MR, Stainki DR, França RT, Machado G, Lopes STA, Monteiro SG, Stefani LM, Da Silva AS. Blood gas analyses and other components involved in the acid-base metabolism of rats infected by Trypanosoma evansi. J Adv Res 2015; 6:1079-82. [PMID: 26644945 PMCID: PMC4642149 DOI: 10.1016/j.jare.2014.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 12/02/2014] [Accepted: 12/03/2014] [Indexed: 10/26/2022] Open
Abstract
The aim of this study was to investigate the effects of Trypanosoma evansi infections on arterial blood gases of experimentally infected rats. Two groups with eight animals each were used; group A (uninfected) and group B (infected). Infected animals were daily monitored through blood smears that showed high parasitemia with 30 trypanosomes per field (1000×) on average, 5 days post-infection (PI). Arterial blood was collected at 5 days PI for blood gas analysis using an automated method based on dry-chemistry. Hydrogen potential (pH), partial oxygen pressure (pO2), oxygen saturation (sO2), sodium (Na), ionic calcium (Ca ionic), chlorides (Cl), partial dioxide carbon pressure (pCO2), base excess (BE), base excess in the extracellular fluid (BEecf), bicarbonate (cHCO3), potassium (K), lactate, and blood total dioxide the carbon (tCO2) were evaluated. The levels of pH, pCO2, BE, BEecf, cHCO3, and tCO2 were significantly decreased (P < 0.05) in group B compared to group A. Additionally, the same group showed increases in Cl and lactate levels when compared to uninfected group. Therefore, it is possible to state that the infection caused by T. evansi led to alterations in the acid-base status, findings that are correlated to metabolic acidosis.
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Affiliation(s)
- Matheus D Baldissera
- Centro Universitário Franciscano, Santa Maria, RS, Brazil ; Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | | | - Camila B Oliveira
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Virginia C Rech
- Laboratory of Nanotechnology, Centro Universitário Franciscano, Santa Maria, RS, Brazil
| | | | - Daniel R Stainki
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Raqueli T França
- Department of Small Animals, Universidade Federal de Santa Maria, Brazil
| | - Gustavo Machado
- Laboratory of Veterinary Epidemiology, Faculty of Veterinary, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Sonia T A Lopes
- Department of Small Animals, Universidade Federal de Santa Maria, Brazil
| | - Silvia G Monteiro
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Lenita M Stefani
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, SC, Brazil
| | - Aleksandro S Da Silva
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, SC, Brazil
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Baldissera MD, Rech VC, Da Silva AS, Nishihira VS, Ianiski FR, Gressler LT, Grando TH, Vaucher RA, Schwertz CI, Mendes RE, Monteiro SG. Relationship between behavioral alterations and activities of adenylate kinase and creatine kinase in brain of rats infected by Trypanosoma evansi. Exp Parasitol 2015; 151-152:96-102. [DOI: 10.1016/j.exppara.2015.01.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/23/2015] [Accepted: 01/27/2015] [Indexed: 12/22/2022]
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