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Ross AG, Harn DA, Chy D, Inobaya M, Guevarra JR, Shollenberger L, Li Y, McManus DP, Gray DJ, Williams GM. First bovine vaccine to prevent human schistosomiasis - a cluster randomised Phase 3 clinical trial. Int J Infect Dis 2023; 129:110-117. [PMID: 36736992 DOI: 10.1016/j.ijid.2023.01.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 01/13/2023] [Accepted: 01/25/2023] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE Schistosomiasis is a neglected tropical parasitic disease caused by blood flukes of the genus Schistosoma. Schistosoma japonicum is zoonotic in China, the Philippines, and Indonesia, with bovines acting as major reservoirs of human infection. The primary objective of the trial was to examine the impact of a combination of human mass chemotherapy, snail control through mollusciciding, and SjCTPI bovine vaccination on the rate of human infection. METHODS A 5-year phase IIIa cluster randomized control trial was conducted among 18 schistosomiasis-endemic villages comprising 18,221 residents in Northern Samar, The Philippines. RESULTS Overall, bovine vaccination resulted in a statistically significant decrease in human infection (relative risk [RR] = 0.75; 95% confidence interval [CI] = 0.69 to 0.82) across all trial follow-ups. The best outcome of the trial was when bovine vaccination was combined with snail mollusciciding. This combination resulted in a 31% reduction (RR = 0.69; 95% CI = 0.61 to 0.78) in human infection. CONCLUSION This is the first trial to demonstrate the effectiveness of a bovine vaccine for schistosomiasis in reducing human schistosome infection. The trial is registered with Australian New Zealand Clinical Trials Registry (ACTRN12619001048178).
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Affiliation(s)
- Allen G Ross
- Rural Health Research Institute, Charles Sturt University, Orange, NSW, Australia.
| | - Donald A Harn
- Department of Infectious Diseases, College of Veterinary Medicine and Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, USA
| | - Delia Chy
- Municipal Officer of Health, Palapag, Northern Samar, The Philippines
| | | | | | - Lisa Shollenberger
- Department of Biological Sciences, Old Dominion University, Norfolk, Virginia, USA
| | - Yuesheng Li
- Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Donald P McManus
- Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Darren J Gray
- Research School of Population Health, Australian National University, Canberra, Australia
| | - Gail M Williams
- School of Public Health, University of Queensland, Brisbane, Australia
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Carpenter JM, Brown KA, Veltmaat L, Ludwig HD, Clay KB, Norberg T, Harn DA, Wagner JJ, Filipov NM. Evaluation of delayed LNFPIII treatment initiation protocol on improving long-term behavioral and neuroinflammatory pathology in a mouse model of Gulf War Illness. Brain Behav Immun Health 2022; 26:100553. [DOI: 10.1016/j.bbih.2022.100553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 10/29/2022] [Accepted: 11/06/2022] [Indexed: 11/09/2022] Open
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Pathak AK, Shiau JC, Franke-Fayard B, Shollenberger LM, Harn DA, Kyle DE, Murdock CC. Streamlining sporozoite isolation from mosquitoes by leveraging the dynamics of migration to the salivary glands. Malar J 2022; 21:264. [PMID: 36100902 PMCID: PMC9472382 DOI: 10.1186/s12936-022-04270-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 08/12/2022] [Indexed: 12/05/2022] Open
Abstract
Background Sporozoites isolated from the salivary glands of Plasmodium-infected mosquitoes are a prerequisite for several basic and pre-clinical applications. Although salivary glands are pooled to maximize sporozoite recovery, insufficient yields pose logistical and analytical hurdles; thus, predicting yields prior to isolation would be valuable. Preceding oocyst densities in the midgut is an obvious candidate. However, it is unclear whether current understanding of its relationship with sporozoite densities can be used to maximize yields, or whether it can capture the potential density-dependence in rates of sporozoite invasion of the salivary glands. Methods This study presents a retrospective analysis of Anopheles stephensi mosquitoes infected with two strains of the rodent-specific Plasmodium berghei. Mean oocyst densities were estimated in the midguts earlier in the infection (11–15 days post-blood meal), with sporozoites pooled from the salivary glands later in the infection (17–29 days). Generalized linear mixed effects models were used to determine if (1) mean oocyst densities can predict sporozoite yields from pooled salivary glands, (2) whether these densities can capture differences in rates of sporozoite invasion of salivary glands, and (3), if the interaction between oocyst densities and time could be leveraged to boost overall yields. Results The non-linear effect of mean oocyst densities confirmed the role of density-dependent constraints in limiting yields beyond certain oocyst densities. Irrespective of oocyst densities however, the continued invasion of salivary glands by the sporozoites boosted recoveries over time (17–29 days post-blood meal) for either parasite strain. Conclusions Sporozoite invasion of the salivary glands over time can be leveraged to maximize yields for P. berghei. In general, however, invasion of the salivary glands over time is a critical fitness determinant for all Plasmodium species (extrinsic incubation period, EIP). Thus, delaying sporozoite collection could, in principle, substantially reduce dissection effort for any parasite within the genus, with the results also alluding to the potential for changes in sporozoites densities over time to modify infectivity for the next host. Supplementary Information The online version contains supplementary material available at 10.1186/s12936-022-04270-y.
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Carpenter JM, Brown KA, Diaz AN, Dockman RL, Benbow RA, Harn DA, Norberg T, Wagner JJ, Filipov NM. Delayed treatment with the immunotherapeutic LNFPIII ameliorates multiple neurological deficits in a pesticide-nerve agent prophylactic mouse model of Gulf War Illness. Neurotoxicol Teratol 2021; 87:107012. [PMID: 34256162 DOI: 10.1016/j.ntt.2021.107012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 07/03/2021] [Accepted: 07/05/2021] [Indexed: 12/20/2022]
Abstract
Residual effects of the 1990-1991 Gulf War (GW) still plague veterans 30 years later as Gulf War Illness (GWI). Thought to stem mostly from deployment-related chemical overexposures, GWI is a disease with multiple neurological symptoms with likely immunological underpinnings. Currently, GWI remains untreatable, and the long-term neurological disease manifestation is not characterized fully. The present study sought to expand and evaluate the long-term implications of prior GW chemicals exposure on neurological function 6-8 months post GWI-like symptomatology induction. Additionally, the beneficial effects of delayed treatment with the glycan immunotherapeutic lacto-N-fucopentaose III (LNFPIII) were evaluated. Male C57BL/6J mice underwent a 10-day combinational exposure (i.p.) to GW chemicals, the nerve agent prophylactic pyridostigmine bromide (PB) and the insecticide permethrin (PM; 0.7 and 200 mg/kg, respectively). Beginning 4 months after PB/PM exposure, a subset of the mice were treated twice a week until study completion with LNFPIII. Evaluation of cognition/memory, motor function, and mood was performed beginning 1 month after LNFPIII treatment initiation. Prior exposure to PB/PM produced multiple locomotor, neuromuscular, and sensorimotor deficits across several motor tests. Subtle anxiety-like behavior was also present in PB/PM mice in mood tests. Further, PB/PM-exposed mice learned at a slower rate, mostly during early phases of the learning and memory tests employed. LNFPIII treatment restored or improved many of these behaviors, particularly in motor and cognition/memory domains. Electrophysiology data collected from hippocampal slices 8 months post PB/PM exposure revealed modest aberrations in basal synaptic transmission and long-term potentiation in the dorsal or ventral hippocampus that were improved by LNFPIII treatment. Immunohistochemical analysis of tyrosine hydroxylase (TH), a dopaminergic marker, did not detect major PB/PM effects along the nigrostriatal pathway, but LNFPIII increased striatal TH. Additionally, neuroinflammatory cells were increased in PB/PM mice, an effect reduced by LNFPIII. Collectively, long-term neurobehavioral and neurobiological dysfunction associated with prior PB/PM exposure was characterized; delayed LNFPIII treatment provided multiple behavioral and biological beneficial effects in the context of GWI, highlighting its potential as a GWI therapeutic.
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Affiliation(s)
- Jessica M Carpenter
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Neuroscience Program, University of Georgia, Athens, GA, United States
| | - Kyle A Brown
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA, United States
| | - Alexa N Diaz
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States
| | - Rachel L Dockman
- Department of Microbiology, University of Georgia, Athens, GA, United States
| | - Robert A Benbow
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States
| | - Donald A Harn
- Department of Infectious Diseases, University of Georgia, Athens, GA, United States; Center for Tropical and Emerging Infectious Diseases, University of Georgia, Athens, GA, United States
| | - Thomas Norberg
- Department of Chemistry, University of Uppsala, Uppsala, Sweden
| | - John J Wagner
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Neuroscience Program, University of Georgia, Athens, GA, United States; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA, United States.
| | - Nikolay M Filipov
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Neuroscience Program, University of Georgia, Athens, GA, United States; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA, United States.
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Brown KA, Carpenter JM, Preston CJ, Ludwig HD, Clay KB, Harn DA, Norberg T, Wagner JJ, Filipov NM. Lacto-N-fucopentaose-III ameliorates acute and persisting hippocampal synaptic plasticity and transmission deficits in a Gulf War Illness mouse model. Life Sci 2021; 279:119707. [PMID: 34102195 DOI: 10.1016/j.lfs.2021.119707] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 05/19/2021] [Accepted: 06/01/2021] [Indexed: 12/12/2022]
Abstract
AIMS The present study investigated if treatment with the immunotherapeutic, lacto-N-fucopentaose-III (LNFPIII), resulted in amelioration of acute and persisting deficits in synaptic plasticity and transmission as well as trophic factor expression along the hippocampal dorsoventral axis in a mouse model of Gulf War Illness (GWI). MAIN METHODS Mice received either coadministered or delayed LNFPIII treatment throughout or following, respectively, exposure to a 15-day GWI induction paradigm. Subsets of animals were subsequently sacrificed 48 h, seven months, or 11 months post GWI-related (GWIR) exposure for hippocampal qPCR or in vitro electrophysiology experiments. KEY FINDINGS Progressively worsened impairments in hippocampal synaptic plasticity, as well as a biphasic effect on hippocampal synaptic transmission, were detected in GWIR-exposed animals. Dorsoventral-specific impairments in hippocampal synaptic responses became more pronounced over time, particularly in the dorsal hippocampus. Notably, delayed LNFPIII treatment ameliorated GWI-related aberrations in hippocampal synaptic plasticity and transmission seven and 11 months post-exposure, an effect that was consistent with enhanced hippocampal trophic factor expression and absence of increased interleukin 6 (IL-6) in animals treated with LNFPIII. SIGNIFICANCE Approximately a third of Gulf War Veterans have GWI; however, GWI therapeutics are presently limited to targeted and symptomatic treatments. As increasing evidence underscores the substantial role of persisting neuroimmune dysfunction in GWI, efficacious neuroactive immunotherapeutics hold substantial promise in yielding GWI remission. The findings in the present report indicate that LNFPIII may be an efficacious candidate for ameliorating persisting neurological abnormalities presented in GWI.
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Affiliation(s)
- Kyle A Brown
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA, United States
| | - Jessica M Carpenter
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Neuroscience Program, University of Georgia, Athens, GA, United States
| | - Collin J Preston
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA, United States
| | - Helaina D Ludwig
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA, United States
| | - Kendall B Clay
- Neuroscience Program, University of Georgia, Athens, GA, United States
| | - Donald A Harn
- Department of Infectious Diseases, University of Georgia, Athens, GA, United States; Center for Tropical and Emerging Diseases, University of Georgia, Athens, GA, United States
| | - Thomas Norberg
- Department of Chemistry, University of Uppsala, Uppsala, Sweden
| | - John J Wagner
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA, United States; Neuroscience Program, University of Georgia, Athens, GA, United States.
| | - Nikolay M Filipov
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, United States; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA, United States; Neuroscience Program, University of Georgia, Athens, GA, United States.
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Carpenter JM, Gordon HE, Ludwig HD, Wagner JJ, Harn DA, Norberg T, Filipov NM. Neurochemical and neuroinflammatory perturbations in two Gulf War Illness models: Modulation by the immunotherapeutic LNFPIII. Neurotoxicology 2019; 77:40-50. [PMID: 31866310 DOI: 10.1016/j.neuro.2019.12.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 12/12/2019] [Accepted: 12/19/2019] [Indexed: 01/06/2023]
Abstract
Gulf War Illness (GWI) manifests a multitude of symptoms, including neurological and immunological, and approximately a third of the 1990-1991 Gulf War (GW) veterans suffer from it. This study sought to characterize the acute neurochemical (monoamine) and neuroinflammatory profiles of two established GWI animal models and examine the potential modulatory effects of the novel immunotherapeutic Lacto-N-fucopentaose III (LNFPIII). In Model 1, male C57BL/6 J mice were treated for 10 days with pyridostigmine bromide (PB) and permethrin (PM). In Model 2, a separate cohort of mice were treated for 14 days with PB and N,N-Diethyl-methylbenzamide (DEET), plus corticosterone (CORT) via drinking water on days 8-14 and diisopropylfluorophosphate (DFP) on day 15. LNFPIII was administered concurrently with GWI chemicals treatments. Brain and spleen monoamines and hippocampal inflammatory marker expression were examined by, respectively, HPLC-ECD and qPCR, 6 h post treatment cessation. Serotonergic (5-HT) and dopaminergic (DA) dyshomeostasis caused by GWI chemicals was apparent in multiple brain regions, primarily in the nucleus accumbens (5-HT) and hippocampus (5-HT, DA) for both models. Splenic levels of 5-HT (both models) and norepinephrine (Model 2) were also disrupted by GWI chemicals. LNFPIII treatment prevented many of the GWI chemicals induced monoamine alterations. Hippocampal inflammatory cytokines were increased in both models, but the magnitude and spread of inflammation was greater in Model 2; LNFPIII was anti-inflammatory, more so in the apparently milder Model 1. Overall, in both models, GWI chemicals led to monoamine disbalance and neuroinflammation. LNFPIII co-treatment prevented many of these disruptions in both models, which is indicative of its promise as a potential GWI therapeutic.
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Affiliation(s)
- J M Carpenter
- Department of Physiology and Pharmacology, Athens, GA, United States
| | - H E Gordon
- Department of Physiology and Pharmacology, Athens, GA, United States
| | - H D Ludwig
- Department of Physiology and Pharmacology, Athens, GA, United States
| | - J J Wagner
- Department of Physiology and Pharmacology, Athens, GA, United States
| | - D A Harn
- Department of Infectious Diseases, Athens, GA, United States; Center for Tropical and Emerging Infectious Diseases, University of Georgia, Athens, GA, United States
| | - T Norberg
- Department of Chemistry, University of Uppsala, Uppsala, Sweden
| | - N M Filipov
- Department of Physiology and Pharmacology, Athens, GA, United States.
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Williams GM, Li YS, Gray DJ, Zhao ZY, Harn DA, Shollenberger LM, Li SM, Yu X, Feng Z, Guo JG, Zhou J, Dong YL, Li Y, Guo B, Driguez P, Harvie M, You H, Ross AG, McManus DP. Field Testing Integrated Interventions for Schistosomiasis Elimination in the People's Republic of China: Outcomes of a Multifactorial Cluster-Randomized Controlled Trial. Front Immunol 2019; 10:645. [PMID: 31001264 PMCID: PMC6456715 DOI: 10.3389/fimmu.2019.00645] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 03/11/2019] [Indexed: 11/13/2022] Open
Abstract
Despite significant progress, China faces the challenge of re-emerging schistosomiasis transmission in currently controlled areas due, in part, to the presence of a range of animal reservoirs, notably water buffalo and cattle, which can harbor Schistosoma japonicum infections. Environmental, ecological and social-demographic changes in China, shown to affect the distribution of oncomelanid snails, can also impact future schistosomiasis transmission. In light of their importance in the S. japonicum, lifecycle, vaccination has been proposed as a means to reduce the excretion of egg from cattle and buffalo, thereby interrupting transmission from these reservoir hosts to snails. A DNA-based vaccine (SjCTPI) our team developed showed encouraging efficacy against S. japonicum in Chinese water buffaloes. Here we report the results of a double-blind cluster randomized trial aimed at determining the impact of a combination of the SjCTPI bovine vaccine (given as a prime-boost regimen), human mass chemotherapy and snail control on the transmission of S. japonicum in 12 selected administrative villages around the Dongting Lake in Hunan province. The trial confirmed human praziquantel treatment is an effective intervention at the population level. Further, mollusciciding had an indirect ~50% efficacy in reducing human infection rates. Serology showed that the SjCTPI vaccine produced an effective antibody response in vaccinated bovines, resulting in a negative correlation with bovine egg counts observed at all post-vaccination time points. Despite these encouraging outcomes, the effect of the vaccine in preventing human infection was inconclusive. This was likely due to activities undertaken by the China National Schistosomiasis Control Program, notably the treatment, sacrifice or removal of bovines from trial villages, over which we had no control; as a result, the trial design was compromised, reducing power and contaminating outcome measures. This highlights the difficulties in undertaking field trials of this nature and magnitude, particularly over a long period, and emphasizes the importance of mathematical modeling in predicting the potential impact of control intervention measures. A transmission blocking vaccine targeting bovines for the prevention of S. japonicum with the required protective efficacy would be invaluable in tandem with other preventive intervention measures if the goal of eliminating schistosomiasis from China is to become a reality.
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Affiliation(s)
- Gail M Williams
- School of Public Health, University of Queensland, Brisbane, QLD, Australia
| | - Yue-Sheng Li
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia.,World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Hunan Institute of Parasitic Diseases, Yueyang, China
| | - Darren J Gray
- School of Public Health, University of Queensland, Brisbane, QLD, Australia.,Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia.,Research School of Population Health, Australian National University, Canberra, ACT, Australia
| | - Zheng-Yuan Zhao
- World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Hunan Institute of Parasitic Diseases, Yueyang, China
| | - Donald A Harn
- Department of Infectious Diseases, College of Veterinary Medicine and Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, GA, United States
| | - Lisa M Shollenberger
- Department of Biological Sciences, Old Dominion University, Norfolk, VA, United States
| | - Sheng-Ming Li
- World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Hunan Institute of Parasitic Diseases, Yueyang, China
| | - Xinglin Yu
- World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Hunan Institute of Parasitic Diseases, Yueyang, China
| | - Zeng Feng
- Chinese Centre for Disease Control and Prevention, National Institute of Parasitic Diseases, Shanghai, China
| | - Jia-Gang Guo
- World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Hunan Institute of Parasitic Diseases, Yueyang, China
| | - Jie Zhou
- World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Hunan Institute of Parasitic Diseases, Yueyang, China
| | - Yu-Lan Dong
- World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Hunan Institute of Parasitic Diseases, Yueyang, China
| | - Yuan Li
- Centre of Cell and Molecular Biology Experiment, Xiangya School of Medicine, Central South University, Changsha, China
| | - Biao Guo
- School of Public Health, University of Queensland, Brisbane, QLD, Australia
| | - Patrick Driguez
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Marina Harvie
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Hong You
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Allen G Ross
- Menzies Health Institute, Griffith University, Gold Coast, QLD, Australia.,International Centre for Diarrhoeal Disease Research (ICDDR), Dhaka, Bangladesh
| | - Donald P McManus
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
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Silva-Moraes V, Shollenberger LM, Siqueira LMV, Castro-Borges W, Harn DA, Grenfell RFQE, Rabello ALT, Coelho PMZ. Diagnosis of Schistosoma mansoni infections: what are the choices in Brazilian low-endemic areas? Mem Inst Oswaldo Cruz 2019; 114:e180478. [PMID: 30942278 PMCID: PMC6440364 DOI: 10.1590/0074-02760180478] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 02/21/2019] [Indexed: 12/25/2022] Open
Abstract
The population of Brazil is currently characterised by many individuals harbouring low-intensity Schistosoma mansoni infections. The Kato-Katz technique is the diagnostic method recommended by the World Health Organization (WHO) to assess these infections, but this method is not sensitive enough in the context of low egg excretion. In this regard, potential alternatives are being employed to overcome the limits of the Kato-Katz technique. In the present review, we evaluated the performance of parasitological and immunological approaches adopted in Brazilian areas. Currently, the diagnostic choices involve a combination of strategies, including the utilisation of antibody methods to screen individuals and then subsequent confirmation of positive cases by intensive parasitological investigations.
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Affiliation(s)
- Vanessa Silva-Moraes
- Fundação Oswaldo Cruz-Fiocruz, Instituto René Rachou, Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Belo Horizonte, MG, Brasil.,University of Georgia, College of Veterinary Medicine, Department of Infectious Diseases, Athens, GA, United States of America
| | - Lisa M Shollenberger
- Fundação Oswaldo Cruz-Fiocruz, Instituto René Rachou, Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Belo Horizonte, MG, Brasil.,Old Dominion University, Department of Biological Sciences, Norfolk, VA, United States of America
| | - Liliane Maria Vidal Siqueira
- Fundação Oswaldo Cruz-Fiocruz, Instituto René Rachou, Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Belo Horizonte, MG, Brasil
| | - William Castro-Borges
- Universidade Federal de Ouro Preto, Laboratório de Enzimologia e Proteômica, Ouro Preto, MG, Brasil
| | - Donald A Harn
- University of Georgia, College of Veterinary Medicine, Department of Infectious Diseases, Athens, GA, United States of America
| | - Rafaella Fortini Queiroz E Grenfell
- Fundação Oswaldo Cruz-Fiocruz, Instituto René Rachou, Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Belo Horizonte, MG, Brasil.,University of Georgia, College of Veterinary Medicine, Department of Infectious Diseases, Athens, GA, United States of America
| | - Ana Lucia Teles Rabello
- Fundação Oswaldo Cruz-Fiocruz, Instituto René Rachou, Grupo de Pesquisas Clínicas e Políticas Públicas em Doenças Infecciosas e Parasitárias, Belo Horizonte, MG, Brasil
| | - Paulo Marcos Zech Coelho
- Fundação Oswaldo Cruz-Fiocruz, Instituto René Rachou, Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Belo Horizonte, MG, Brasil
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Silva-Moraes V, Shollenberger LM, Castro-Borges W, Rabello ALT, Harn DA, Medeiros LCS, Jeremias WDJ, Siqueira LMV, Pereira CSS, Pedrosa MLC, Almeida NBF, Almeida A, Lambertucci JR, Carneiro NFDF, Coelho PMZ, Grenfell RFQ. Serological proteomic screening and evaluation of a recombinant egg antigen for the diagnosis of low-intensity Schistosoma mansoni infections in endemic area in Brazil. PLoS Negl Trop Dis 2019; 13:e0006974. [PMID: 30870412 PMCID: PMC6472831 DOI: 10.1371/journal.pntd.0006974] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 04/18/2019] [Accepted: 02/13/2019] [Indexed: 11/22/2022] Open
Abstract
Background Despite decades of use of control programs, schistosomiasis remains a global public health problem. To further reduce prevalence and intensity of infection, or to achieve the goal of elimination in low-endemic areas, there needs to be better diagnostic tools to detect low-intensity infections in low-endemic areas in Brazil. The rationale for development of new diagnostic tools is that the current standard test Kato-Katz (KK) is not sensitive enough to detect low-intensity infections in low-endemic areas. In order to develop new diagnostic tools, we employed a proteomics approach to identify biomarkers associated with schistosome-specific immune responses in hopes of developing sensitive and specific new methods for immunodiagnosis. Methods and findings Immunoproteomic analyses were performed on egg extracts of Schistosoma mansoni using pooled sera from infected or non-infected individuals from a low-endemic area of Brazil. Cross reactivity with other soil-transmitted helminths (STH) was determined using pooled sera from individuals uniquely infected with different helminths. Using this approach, we identified 23 targets recognized by schistosome acute and chronic sera samples. To identify immunoreactive targets that were likely glycan epitopes, we compared these targets to the immunoreactivity of spots treated with sodium metaperiodate oxidation of egg extract. This treatment yielded 12/23 spots maintaining immunoreactivity, suggesting that they were protein epitopes. From these 12 spots, 11 spots cross-reacted with sera from individuals infected with other STH and 10 spots cross-reacted with the negative control group. Spot number 5 was exclusively immunoreactive with sera from S. mansoni-infected groups in native and deglycosylated conditions and corresponds to Major Egg Antigen (MEA). We expressed MEA as a recombinant protein and showed a similar recognition pattern to that of the native protein via western blot. IgG-ELISA gave a sensitivity of 87.10% and specificity of 89.09% represented by area under the ROC curve of 0.95. IgG-ELISA performed better than the conventional KK (2 slides), identifying 56/64 cases harboring 1–10 eggs per gram of feces that were undiagnosed by KK parasitological technique. Conclusions The serological proteome approach was able to identify a new diagnostic candidate. The recombinant egg antigen provided good performance in IgG-ELISA to detect individuals with extreme low-intensity infections (1 egg per gram of feces). Therefore, the IgG-ELISA using this newly identified recombinant MEA can be a useful tool combined with other techniques in low-endemic areas to determine the true prevalence of schistosome infection that is underestimated by the KK method. Further, to overcome the complexity of ELISA in the field, a second generation of antibody-based rapid diagnostic tests (RDT) can be developed. Schistosomiasis remains a serious global public health problem. Detecting parasite eggs in patient stool samples using the KK method is the standard diagnostic recommended by the World Health Organization (WHO) for infection by S. mansoni. As a result of intensive control strategies, many previously high-endemic areas are now considered low-endemic areas and the KK method does not function well in low-endemic areas and therefore cannot be considered the gold standard. Thus, a new emphasis on strategies to accurately diagnose low-intensity infections was outlined in a plan from the WHO focusing on elimination of disease as a public health problem. Successful diagnoses and treatment of infected individuals may result in eradication of low-burden transmitters and consequently contribute to interruption of disease transmission. In this regard, immunological techniques have proven to be more sensitive and promising for identifying low-intensity infections where KK may be negative. The identification of antigens is the initial step for developing new immunodiagnostic assays. In this study, we used sets of pooled human sera samples from controls with acute and chronic infections to identify new target antigens via proteomic screening. Using these approaches, we initially identified 12 different egg proteins in S. mansoni-infected individuals (acute and chronic phase). A single antigen, identified as MEA, was shown to be highly specific as this antigen was not recognized by sera from negative patients or patients infected with other STH. The recombinant MEA protein functioned in an ELISA as a highly sensitive and specific antigen to detect patient IgG-antibodies. Recombinant MEA performed significantly better to detect low-intensity infections (1 egg per gram of feces) than the KK method using 2 slides. Therefore, we were able to use a proteomic screening approach to identify a potential new candidate antigen for development of far more sensitive diagnostic assays. Further diagnostic assays employing the MEA could be useful tools on their own or in combination with other methods for diagnosis of schistosome infection in populations living in extreme low-intensity endemic areas of Brazil.
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Affiliation(s)
- Vanessa Silva-Moraes
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
| | - Lisa Marie Shollenberger
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - William Castro-Borges
- Laboratório de Enzimologia e Proteomica, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Ana Lucia Teles Rabello
- Grupo de Pesquisas Clínicas e Políticas Públicas em Doenças Infecciosas e Parasitárias, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Donald A. Harn
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | | | - Wander de Jesus Jeremias
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Liliane Maria Vidal Siqueira
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Caroline Stephane Salviano Pereira
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Maria Luysa Camargos Pedrosa
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Nathalie Bonatti Franco Almeida
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Aureo Almeida
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Paulo Marcos Zech Coelho
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Rafaella Fortini Queiroz Grenfell
- Biologia do Schistosoma mansoni e sua interação com o hospedeiro, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
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10
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Da'Dara AA, Li C, Yu X, Zheng M, Zhou J, Shollenberger LM, Li YS, Harn DA. Prime-Boost Vaccine Regimen for SjTPI and SjC23 Schistosome Vaccines, Increases Efficacy in Water Buffalo in a Field Trial in China. Front Immunol 2019; 10:284. [PMID: 30842779 PMCID: PMC6391362 DOI: 10.3389/fimmu.2019.00284] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 02/04/2019] [Indexed: 01/14/2023] Open
Abstract
Schistosomiasis remains a serious zoonotic disease in China and the Philippines. Water buffalo and cattle account for the majority of transmission. Vaccination of water buffalo is considered a key strategy to reduce disease prevalence. Previously, we showed that vaccination of water buffalo with SjC23 or SjCTPI plasmid DNA vaccines, induced 50% efficacy to challenge infection. Here, we evaluated several parameters to determine if we can develop a two dose vaccine that maintains the efficacy of the three dose vaccine. We performed four trials evaluating: (1) lab produced vs. GLP grade vaccines, (2) varying the time between prime and boost, (3) the influence of an IL-12 adjuvant, and (4) a two dose heterologous (DNA-protein) prime-boost. We found the source of the DNA vaccines did not matter, nor did increasing the interval between prime and boost. Elimination of the IL-12 plasmid lowered homologous DNA-DNA vaccine efficacy. A major finding was that the heterologous prime boost improved vaccine efficacy, with the prime-boost regimen incorporating both antigens providing a 55% reduction in adult worms and 53% reduction in liver eggs. Vaccinated buffalo produced vaccine-specific antibody responses. These trials suggest that highly effective vaccination against schistosomes can be achieved using a two dose regimen. No adjuvants were used with the protein boost, and the potential that addition of adjuvant to the protein boost to further increase efficacy should be evaluated. These results suggest that use of these two schistosome vaccines can be part of an integrated control strategy to reduce transmission of schistosomiasis in Asia.
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Affiliation(s)
- Akram A. Da'Dara
- Department of Infectious Diseases and Global Health, Tufts Cummings School of Veterinary Medicine, Tufts University, Grafton, MA, United States
| | - Changlin Li
- Department of Infectious Diseases and Center for Tropical and Emerging Global Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Xinling Yu
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, China
| | - Mao Zheng
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, China
| | - Jie Zhou
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, China
| | - Lisa M. Shollenberger
- Department of Biological Sciences, Old Dominion University, Norfolk, VA, United States
| | - Yue-sheng Li
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, China
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Donald A. Harn
- Department of Infectious Diseases and Center for Tropical and Emerging Global Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
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11
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Pati S, Krishna S, Lee JH, Ross MK, de La Serre CB, Harn DA, Wagner JJ, Filipov NM, Cummings BS. Effects of high-fat diet and age on the blood lipidome and circulating endocannabinoids of female C57BL/6 mice. Biochim Biophys Acta Mol Cell Biol Lipids 2017; 1863:26-39. [PMID: 28986283 DOI: 10.1016/j.bbalip.2017.09.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 08/17/2017] [Accepted: 09/24/2017] [Indexed: 01/06/2023]
Abstract
Alterations in lipid metabolism play a significant role in the pathogenesis of obesity-associated disorders, and dysregulation of the lipidome across multiple diseases has prompted research to identify novel lipids indicative of disease progression. To address the significant gap in knowledge regarding the effect of age and diet on the blood lipidome, we used shotgun lipidomics with electrospray ionization-mass spectrometry (ESI-MS). We analyzed blood lipid profiles of female C57BL/6 mice following high-fat diet (HFD) and low-fat diet (LFD) consumption for short (6weeks), long (22weeks), and prolonged (36weeks) periods. We examined endocannabinoid levels, plasma esterase activity, liver homeostasis, and indices of glucose tolerance and insulin sensitivity to compare lipid alterations with metabolic dysregulation. Multivariate analysis indicated differences in dietary blood lipid profiles with the most notable differences after 6weeks along with robust alterations due to age. HFD altered phospholipids, fatty acyls, and glycerolipids. Endocannabinoid levels were affected in an age-dependent manner, while HFD increased plasma esterase activity at all time points, with the most pronounced effect at 6weeks. HFD-consumption also altered liver mRNA levels of PPARα, PPARγ, and CD36. These findings indicate an interaction between dietary fat consumption and aging with widespread effects on the lipidome, which may provide a basis for identification of female-specific obesity- and age-related lipid biomarkers.
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Affiliation(s)
- Sumitra Pati
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, United States
| | - Saritha Krishna
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, United States
| | - Jung Hwa Lee
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Starkville, MS 39759, United States
| | - Matthew K Ross
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Starkville, MS 39759, United States
| | - Claire B de La Serre
- Department of Foods and Nutrition, College of Family and Consumer Sciences, University of Georgia, Athens, GA 30602, United States
| | - Donald A Harn
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, United States
| | - John J Wagner
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, United States; Interdisciplinary Toxicology Program, University of, Georgia, Athens, GA 30602, United States
| | - Nikolay M Filipov
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, United States; Interdisciplinary Toxicology Program, University of, Georgia, Athens, GA 30602, United States.
| | - Brian S Cummings
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, United States; Interdisciplinary Toxicology Program, University of, Georgia, Athens, GA 30602, United States.
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12
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Shollenberger LM, Harn DA. Vaccine self-assembling immune matrix is a non-viral delivery platform that improves overall vaccine performance while maintaining safety and stability. The Journal of Immunology 2017. [DOI: 10.4049/jimmunol.198.supp.147.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Vaccination remains the most effective public health tool to prevent infectious disease. Many vaccines are marginally effective, and are less so when administered to immune-compromised populations. To enhance vaccine immunogenicity, we exploited the biphasic property of the (RADA)4 synthetic oligopeptide to create a new vaccine delivery method, VacSIM® (vaccine self-assembling immune matrix). Vaccine components are mixed with the VacSIM® solution for injection, after which the (RADA)4 peptides self-assemble into hydrated nanofiber gel-matrices, forming a vaccine depot with the vaccine antigens in the aqueous phase, allowing for slow-release of vaccine components over time. Thus, we have a non-viral, inert, biodegradable delivery system, not requiring formulation that can deliver various types of vaccines. We hypothesize that slow-release of vaccine components provides antigen persistence, driving enhanced vaccine-specific responses that are improved in both quantity and quality. We have tested VacSIM® with live bacterial vectors, inactivated virus and multiple recombinant protein vaccines. VacSIM® delivery of different protein immunogens, including Hepatitis B and HIV Envelope, is superior to delivery in licensed and unlicensed adjuvants and requires only a single injection. VacSIM® improves existing vaccines by reducing the number of injections needed, improving vaccine performance, especially in difficult-to-protect populations like the elderly and immune compromised, and reducing unwelcome side effects. VacSIM® can be stockpiled and stored without a cold chain, which is especially beneficial in resource-limited settings where vaccine access and compliance are issues.
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13
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Olveda DU, Inobaya MT, McManus DP, Olveda RM, Vinluan ML, Ng SK, Harn DA, Li Y, Guevarra JR, Lam AK, Ross AG. Biennial versus annual treatment for schistosomiasis and its impact on liver morbidity. Int J Infect Dis 2017; 54:145-149. [DOI: 10.1016/j.ijid.2016.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 09/22/2016] [Accepted: 10/03/2016] [Indexed: 12/30/2022] Open
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14
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Yu W, Ross AG, Olveda RM, Harn DA, Li Y, Chy D, Williams GM. Risk of human helminthiases: geospatial distribution and targeted control. Int J Infect Dis 2016; 55:131-138. [PMID: 27988408 DOI: 10.1016/j.ijid.2016.12.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 12/07/2016] [Accepted: 12/07/2016] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES We conducted a cross-sectional survey in 2012 among 22 rural barangays in Northern Samar, the Philippines in order to determine the prevalence of single and multiple species helminth infections, their geospatial distribution and underlying risk factors. METHODS A total of 10,434 individuals who had completed both a medical questionnaire and a stool examination were included in the analysis. Barangay specific prevalence rates were displayed in ArcMap. RESULTS The prevalence of Trichuris trichiura infection was found to be the highest at 62.4%, followed by Ascaris lumbricoides, hookworm and S. japonicum with the prevalence rates of 40.2%, 31.32%, and 27.1%, respectively. 52.7% of people were infected with at least two parasites and 4.8% with all four parasites. Males aged 10-19 years were the most vulnerable to coinfection infection. Students, fishermen, farmers and housewives were the most vulnerable occupations for co-infection of A. lumbricoides and T. trichiura. Considerable heterogeneity in the spatial distribution was observed for the different parasite species. There was a considerably higher risk of A. lumbricoides and T. trichiura co-infection in villages with no schistosomiasis infection (P<0.0001) regardless of MDA treatment. CONCLUSIONS A better understanding of the geospatial distribution of multi-parasitism will guide future integrated strategies leading to elimination.
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Affiliation(s)
- Weiwei Yu
- School of Public Health, University of Queensland, Brisbane, Australia
| | - Allen G Ross
- Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia.
| | - Remigio M Olveda
- Research Institute for Tropical Medicine, Department of Health, the Philippines
| | - Donald A Harn
- Centre for Tropical and Emerging Global Health Diseases, University of Georgia, USA
| | - Yuesheng Li
- QIMR Berghofer Medical Research Institute, Australia
| | - Delia Chy
- Municipal Medical Officer of Health, Palapag, Northern Samar
| | - Gail M Williams
- School of Public Health, University of Queensland, Brisbane, Australia
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15
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Ross AGP, Chau TN, Inobaya MT, Olveda RM, Li Y, Harn DA. A new global strategy for the elimination of schistosomiasis. Int J Infect Dis 2016; 54:130-137. [PMID: 27939558 DOI: 10.1016/j.ijid.2016.09.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 09/18/2016] [Indexed: 01/17/2023] Open
Abstract
Mass drug administration utilising a single oral dose of 40mg/kg of praziquantel (PZQ) has been endorsed and advocated by the World Health Organisation (WHO) for the global control and elimination of schistosomiasis. However, this strategy is failing primarily because the drugs are not getting to the people who need them the most. The current global coverage is 20%, the drug compliance rate is less than 50%, and the drug efficacy is approximately 50%. Thus in reality, only about 5% of the reservoir human population is actually receiving intermittent chemotherapy. Despite claims that more of the drug will soon be made available the current strategy is inherently flawed and will not lead to disease elimination. We discuss the many practical issues related to this global strategy, and advocate for an integrated control strategy targeting the life cycle and the most at-risk. Moreover, we discuss how an integrated control package for schistosomiasis should fit within a larger integrated health package for rural and remote villages in the developing world. A holistic health system approach is required to achieve sustainable control and ultimately disease elimination.
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Affiliation(s)
- Allen G P Ross
- Menzies Health Institute Queensland, Griffith University, Australia.
| | - Thao N Chau
- Discipline of Public Health, Flinders University, Australia
| | | | - Remigio M Olveda
- Research Institute for Tropical Medicine, Department of Health, the Philippines
| | - Yuesheng Li
- QIMR Berghofer Medical Research Institute, Australia; Hunan Institute of Parasitic Diseases, Peoples Republic of China
| | - Donald A Harn
- Centre for Tropical and Emerging Global Health Diseases, University of Georgia, USA
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16
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Ross AGP, Olveda RM, McManus DP, Harn DA, Chy D, Li Y, Tallo V, Ng SK. Risk factors for human helminthiases in rural Philippines. Int J Infect Dis 2016; 54:150-155. [PMID: 27717859 DOI: 10.1016/j.ijid.2016.09.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 09/27/2016] [Accepted: 09/28/2016] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND A cross-sectional survey was performed in 2012 among 18 rural barangays in Northern Samar, the Philippines in order to determine the prevalence of single and multiple species helminth infections and the underlying risk factors of acquiring one or more parasites. METHODS A total of 6976 participants who completed a medical questionnaire and provided a stool sample for examination were included in the final analysis. RESULTS The overall prevalence rates of Schistosoma japonicum, Ascaris lumbricoides, Trichuris trichiura, and hookworm were found to be moderate to high at 28.9%, 36.5%, 61.8%, and 28.4%, respectively. However, the prevalence of harbouring any of the helminths was found to be higher at 75.6%. Significant variation was evident among the predicted barangay-specific random effects for infection with S. japonicum (barangay variance of 0.66, 95% confidence interval 0.31-1.40) and for any helminth infection (barangay variance of 0.63, 95% confidence interval 0.30-1.29). The predictive models showed, with greater than 80% sensitivity and specificity, that low socio-economic status, low levels of education, poor sanitation, proximity to water sources, occupation (i.e., farming and fishing), and male sex were all reliable indicators of infection status. CONCLUSIONS This study will aid in the targeting of limited resources for national treatment and WASH (water, sanitation, and hygiene) efforts in low- and middle-income countries.
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Affiliation(s)
- Allen G P Ross
- Menzies Health Institute Queensland, Griffith University, Southport, Queensland, Australia.
| | - Remigio M Olveda
- Research Institute for Tropical Medicine, Department of Health, Muntinlupa, Philippines
| | - Donald P McManus
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Donald A Harn
- The Center for Tropical and Emerging Global Health Diseases, University of Georgia, Athens, Georgia, USA
| | - Delia Chy
- Municipal Medical Officer of Health, Palapag, Northern Samar, Philippines
| | - Yuesheng Li
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Veronica Tallo
- Research Institute for Tropical Medicine, Department of Health, Muntinlupa, Philippines
| | - Shu-Kay Ng
- Menzies Health Institute Queensland, Griffith University, Southport, Queensland, Australia
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17
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Marrache S, Tundup S, Harn DA, Dhar S. Ex vivo generation of functional immune cells by mitochondria-targeted photosensitization of cancer cells. Methods Mol Biol 2015; 1265:113-22. [PMID: 25634271 DOI: 10.1007/978-1-4939-2288-8_9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Stimulating the immune system for potent immune therapy against cancer is potentially a revolutionary method to eradicate cancer. Tumors stimulated with photosensitizers (PSs) not only kill cancer cells but also help to boost the immune system. We recently reported that tumor-associated antigens (TAAs) generated by delivery of a mitochondria-acting PS zinc phthalocyanine (ZnPc) to MCF-7 breast cancer cells followed by laser irradiation can lead to ex vivo stimulation of mouse bone marrow-derived dendritic cells (BMDCs). The antigens generated from the breast cancer cells were also found to cause significant DC maturation and the activated DCs were able to stimulate T cells to cytotoxic CD8(+) T cells. In this protocol, we describe methods to engineer a mitochondria-targeted biodegradable nanoparticle (NP) formulation, T-ZnPc-NPs for delivery of ZnPc to the mitochondria of MCF-7 cells, subsequent photodynamic therapy (PDT) using a long wavelength laser irradiation to produce TAAs, DC stimulation by the TAAs to secrete interferon-gamma (IFN-γ), and matured DC-driven T-cell activation.
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Affiliation(s)
- Sean Marrache
- NanoTherapeutics Research Laboratory, Department of Chemistry, University of Georgia, Athens, GA, 30602, USA
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18
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Krishna S, Keralapurath MM, Lin Z, Wagner JJ, de La Serre CB, Harn DA, Filipov NM. Neurochemical and electrophysiological deficits in the ventral hippocampus and selective behavioral alterations caused by high-fat diet in female C57BL/6 mice. Neuroscience 2015; 297:170-81. [PMID: 25849614 DOI: 10.1016/j.neuroscience.2015.03.068] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 03/28/2015] [Accepted: 03/31/2015] [Indexed: 01/08/2023]
Abstract
Mounting experimental evidence, predominantly from male rodents, demonstrates that high-fat diet (HFD) consumption and ensuing obesity are detrimental to the brain. To shed additional light on the neurological consequences of HFD consumption in female rodents and to determine the relatively early impact of HFD in the likely continuum of neurological dysfunction in the context of chronic HFD intake, this study investigated effects of HFD feeding for up to 12weeks on selected behavioral, neurochemical, and electrophysiological parameters in adult female C57BL/6 mice; particular focus was placed on the ventral hippocampus (vHIP). Selected locomotor, emotional and cognitive functions were evaluated using behavioral tests after 5weeks on HFD or control (low-fat diet) diets. One week later, mice were sacrificed and brain regional neurochemical (monoamine) analysis was performed. Behaviorally naïve mice were maintained on their respective diets for an additional 5-6weeks at which time synaptic plasticity was determined in ex vivo slices from the vHIP. HFD-fed female mice exhibited increased: (i) locomotor activity in the open field testing, (ii) mean turn time on the pole test, (iii) swimming time in the forced swim test, and (iv) number of marbles buried in the marble burying test. In contrast, the novel object recognition memory was unaffected. Mice on HFD also had decreased norepinephrine and dopamine turnover, respectively, in the prefrontal cortex and the vHIP. HFD consumption for a total of 11-12weeks altered vHIP synaptic plasticity, evidenced by significant reductions in the paired-pulse ratio and long-term potentiation (LTP) magnitude. In summary, in female mice, HFD intake for several weeks induced multiple behavioral alterations of mainly anxiety-like nature and impaired monoamine pathways in a brain region-specific manner, suggesting that in the female, certain behavioral domains (anxiety) and associated brain regions, i.e., the vHIP, are preferentially targeted by HFD.
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Affiliation(s)
- S Krishna
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - M M Keralapurath
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - Z Lin
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - J J Wagner
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - C B de La Serre
- Department of Foods and Nutrition, College of Family and Consumer Sciences, University of Georgia, Athens, GA 30602, USA
| | - D A Harn
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - N M Filipov
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.
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19
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Inobaya MT, Olveda RM, Tallo V, McManus DP, Williams GM, Harn DA, Li Y, Chau TNP, Olveda DU, Ross AG. Schistosomiasis mass drug administration in the Philippines: lessons learnt and the global implications. Microbes Infect 2014; 17:6-15. [PMID: 25448635 DOI: 10.1016/j.micinf.2014.10.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 10/16/2014] [Accepted: 10/17/2014] [Indexed: 10/24/2022]
Abstract
Schistosomiasis was first reported in the Philippines in 1906. A variety of treatments have been deployed to cure infection and to control the disease in the long-term. We discuss the journey to combat the disease in the Philippines and the lessons learnt which have implications for schistosomiasis control globally.
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Affiliation(s)
- Marianette T Inobaya
- Griffith Health Institute, Griffith University, Gold Coast Campus, Australia; Research Institute for Tropical Medicine, Department of Health, The Philippines
| | - Remigio M Olveda
- Research Institute for Tropical Medicine, Department of Health, The Philippines
| | - Veronica Tallo
- Research Institute for Tropical Medicine, Department of Health, The Philippines
| | | | - Gail M Williams
- School of Population Health, University of Queensland, Australia
| | - Donald A Harn
- Department of Infectious Diseases, College of Veterinary Medicine and Center for Tropical and Emerging Global Diseases, University of Georgia, USA
| | - Yuesheng Li
- QIMR Berghofer Medical Research Institute, Australia
| | - Thao N P Chau
- Discipline of Public Health, Flinders University, Australia
| | - David U Olveda
- Griffith Health Institute, Griffith University, Gold Coast Campus, Australia
| | - Allen G Ross
- Griffith Health Institute, Griffith University, Gold Coast Campus, Australia.
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Olveda DU, Olveda RM, McManus DP, Cai P, Chau TNP, Lam AK, Li Y, Harn DA, Vinluan ML, Ross AGP. The chronic enteropathogenic disease schistosomiasis. Int J Infect Dis 2014; 28:193-203. [PMID: 25250908 DOI: 10.1016/j.ijid.2014.07.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 06/26/2014] [Accepted: 07/16/2014] [Indexed: 02/08/2023] Open
Abstract
Schistosomiasis is a chronic enteropathogenic disease caused by blood flukes of the genus Schistosoma. The disease afflicts approximately 240 million individuals globally, causing approximately 70 million disability-adjusted life years lost. Chronic infections with morbidity and mortality occur as a result of granuloma formation in the intestine, liver, or in the case of Schistosoma haematobium, the bladder. Various methods are utilized to diagnose and evaluate liver fibrosis due to schistosomiasis. Liver biopsy is still considered the gold standard, but it is invasive. Diagnostic imaging has proven to be an invaluable method in assessing hepatic morbidity in the hospital setting, but has practical limitations in the field. The potential of non-invasive biological markers, serum antibodies, cytokines, and circulating host microRNAs to diagnose hepatic fibrosis is presently undergoing evaluation. This review provides an update on the recent advances made with respect to gastrointestinal disease associated with chronic schistosomiasis.
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Affiliation(s)
- David U Olveda
- Department of Medical Sciences, Griffith Health Institute, Gold Coast, Australia
| | - Remigio M Olveda
- Department of Health, Research Institute for Tropical Medicine, Manila, The Philippines
| | - Donald P McManus
- Department of Molecular Parasitology, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Pengfei Cai
- Department of Molecular Parasitology, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Thao N P Chau
- Department of Public Health, Flinders University, Adelaide, Australia
| | - Alfred K Lam
- Department of Medical Sciences, Griffith Health Institute, Gold Coast, Australia
| | - Yuesheng Li
- Department of Molecular Parasitology, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Donald A Harn
- Department of Infectious Diseases, University of Georgia, Georgia, USA
| | - Marilyn L Vinluan
- Department of Health, Research Institute for Tropical Medicine, Manila, The Philippines
| | - Allen G P Ross
- Department of Medical Sciences, Griffith Health Institute, Gold Coast, Australia.
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Ross AGP, Olveda RM, Chy D, Olveda DU, Li Y, Harn DA, Gray DJ, McManus DP, Tallo V, Chau TNP, Williams GM. Can mass drug administration lead to the sustainable control of schistosomiasis? J Infect Dis 2014; 211:283-9. [PMID: 25070942 DOI: 10.1093/infdis/jiu416] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND In the Philippines, the current national control strategy for schistosomiasis is annual mass drug administration (MDA) with 40 mg/kg of praziquantel in all schistosomiasis-endemic villages with a prevalence ≥10%. METHODS A cross-sectional survey of schistosomiasis was conducted in 2012 on 18 221 individuals residing in 22 schistosomiasis-endemic villages in the province of Northern Samar. The prevalence of schistosomiasis, intensity of Schistosoma infection, and morbidity of disease were assessed. RESULTS Despite an active schistosomiasis-control program in Northern Samar for >30 years, which included a MDA campaign in the last 5 years, the mean prevalence of schistosomiasis among 10 435 evaluated subjects was 27.1% (95% confidence interval [CI], 26.3%-28.0%), and the geometric mean intensity of infection among 2832 evaluated subjects was 17.2 eggs per gram of feces (95% CI, 16.4-18.1). Ultrasonography revealed high levels of schistosomiasis-induced morbidity in the schistosomiasis-endemic communities. Left lobe liver enlargement (≥70 mm) was evident in 89.3% of subjects. Twenty-five percent of the study population had grade II/III liver parenchyma fibrosis, and 13.3% had splenomegaly (≥100 mm). CONCLUSIONS MDA on its own was insufficient to control the prevalence of schistosomiasis, intensity of Schistosoma infection, or morbidity of the disease. Alternative control measures will be needed to complement the existing national MDA program.
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Affiliation(s)
- Allen G P Ross
- Griffith Health Institute, Griffith University, Gold Coast Campus, Queensland, Australia
| | - Remigio M Olveda
- Department of Health, Research Institute for Tropical Medicine, Manila
| | - Delia Chy
- Municipal Medical Officer of Health, Palapag, The Philippines
| | - David U Olveda
- Griffith Health Institute, Griffith University, Gold Coast Campus, Queensland, Australia
| | - Yuesheng Li
- QIMR Berghofer Medical Research Institute, Brisbane, Australia Hunan Institute of Parasitic Diseases, WHO Collaborating Center for Research and Control of Schistosomiasis in the Lake Region, Yueyang, China
| | - Donald A Harn
- Department of Infectious Diseases, College of Veterinary Medicine and Center for Tropical and Emerging Global Diseases, University of Georgia
| | - Darren J Gray
- School of Population Health, University of Queensland, Brisbane
| | | | - Veronica Tallo
- Department of Health, Research Institute for Tropical Medicine, Manila
| | - Thao N P Chau
- Discipline of Public Health, Flinders University, Adelaide, Australia
| | - Gail M Williams
- School of Population Health, University of Queensland, Brisbane
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22
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Gray DJ, Li YS, Williams GM, Zhao ZY, Harn DA, Li SM, Ren MY, Feng Z, Guo FY, Guo JG, Zhou J, Dong YL, Li Y, Ross AG, McManus DP. A multi-component integrated approach for the elimination of schistosomiasis in the People's Republic of China: design and baseline results of a 4-year cluster-randomised intervention trial. Int J Parasitol 2014; 44:659-68. [PMID: 24929133 DOI: 10.1016/j.ijpara.2014.05.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 05/16/2014] [Accepted: 05/19/2014] [Indexed: 11/16/2022]
Abstract
Despite major successes in its control over the past 50years, schistosomiasis japonica continues to be a public health problem in the People's Republic of China (P.R. China). Historically, the major endemic foci occur in the lakes and marshlands along the Yangtze River, areas where transmission interruption has proven difficult. The current endemic situation may alter due to the closure of the Three Gorges Dam. Considerable environmental and ecological changes are anticipated that may result in new habitats for the oncomelanid intermediate snail host of Schistosoma japonicum (Sj), thereby increasing the risk of transmission. The current national control program for P.R. China involves a multi-component integrated strategy but, despite targeting multiple transmission pathways, certain challenges remain. As the Chinese government pushes towards elimination, there is a requirement for additional tools, such as vaccination, for long-term prevention. Whereas the zoonotic nature of schistosomiasis japonica adds to the complexity of control, it provides a unique opportunity to develop a transmission blocking vaccine targeting bovines to assist in the prevention of human infection and disease. Mathematical modelling has shown that control options targeting the various transmission pathways of schistosomiasis japonica and incorporating bovine vaccination, mass human chemotherapy and mollusciciding could lead to its elimination from P.R. China. Here we present the study design and baseline results of a four-year cluster randomised intervention trial we are undertaking around the schistosomiasis-endemic Dongting Lake in Hunan Province aimed at determining the impact on schistosome transmission of the multi-component integrated control strategy, including bovine vaccination using a heterologous "prime-boost" delivery platform based on the previously tested SjCTPI vaccine.
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Affiliation(s)
- Darren J Gray
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, Australia; School of Population Health, University of Queensland, Brisbane, Australia; Research School of Population Health, Australian National University, Canberra, Australia
| | - Yue-Sheng Li
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, Australia; Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China
| | - Gail M Williams
- School of Population Health, University of Queensland, Brisbane, Australia
| | - Zheng-Yuan Zhao
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China
| | - Donald A Harn
- Department of Infectious Diseases, College of Veterinary Medicine and Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, USA
| | - Sheng-Ming Li
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China
| | - Mao-Yuan Ren
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China
| | - Zeng Feng
- National Institute of Parasitic Diseases, Chinese Centre for Disease Control and Prevention, Shanghai, People's Republic of China
| | - Feng-Ying Guo
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China
| | - Jia-Gang Guo
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China
| | - Jie Zhou
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China
| | - Yu-Lan Dong
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China
| | - Yuan Li
- Central South University, Changsha, People's Republic of China
| | - Allen G Ross
- Griffith Health Institute, Griffith University, Gold Coast, Australia
| | - Donald P McManus
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, Australia.
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Pathak RK, Marrache S, Harn DA, Dhar S. Mito-DCA: a mitochondria targeted molecular scaffold for efficacious delivery of metabolic modulator dichloroacetate. ACS Chem Biol 2014; 9:1178-87. [PMID: 24617941 PMCID: PMC4033660 DOI: 10.1021/cb400944y] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
![]()
Tumor
growth is fueled by the use of glycolysis, which normal cells
use only in the scarcity of oxygen. Glycolysis makes tumor cells resistant
to normal death processes. Targeting this unique tumor metabolism
can provide an alternative strategy to selectively destroy the tumor,
leaving normal tissue unharmed. The orphan drug dichloroacetate (DCA)
is a mitochondrial kinase inhibitor that has the ability to show such
characteristics. However, its molecular form shows poor uptake and
bioavailability and limited ability to reach its target mitochondria.
Here, we describe a targeted molecular scaffold for construction of
a multiple DCA loaded compound, Mito-DCA, with three orders of magnitude
enhanced potency and cancer cell specificity compared to DCA. Incorporation
of a lipophilic triphenylphosphonium cation through a biodegradable
linker in Mito-DCA allowed for mitochondria targeting. Mito-DCA did
not show any significant metabolic effects toward normal cells but
tumor cells with dysfunctional mitochondria were affected by Mito-DCA,
which caused a switch from glycolysis to glucose oxidation and subsequent
cell death via apoptosis. Effective delivery of DCA
to the mitochondria resulted in significant reduction in lactate levels
and played important roles in modulating dendritic cell (DC) phenotype
evidenced by secretion of interleukin-12 from DCs upon activation
with tumor antigens from Mito-DCA treated cancer cells. Targeting
mitochondrial metabolic inhibitors to the mitochondria could lead
to induction of an efficient antitumor immune response, thus introducing
the concept of combining glycolysis inhibition with immune system
to destroy tumor.
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Affiliation(s)
- Rakesh K. Pathak
- NanoTherapeutics Research Laboratory, Department of Chemistry and ‡Department of Infectious
Diseases, University of Georgia, Athens, Georgia 30602, United States
| | - Sean Marrache
- NanoTherapeutics Research Laboratory, Department of Chemistry and ‡Department of Infectious
Diseases, University of Georgia, Athens, Georgia 30602, United States
| | - Donald A. Harn
- NanoTherapeutics Research Laboratory, Department of Chemistry and ‡Department of Infectious
Diseases, University of Georgia, Athens, Georgia 30602, United States
| | - Shanta Dhar
- NanoTherapeutics Research Laboratory, Department of Chemistry and ‡Department of Infectious
Diseases, University of Georgia, Athens, Georgia 30602, United States
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Grenfell RFQ, Coelho PMZ, Taboada D, de Mattos ACA, Davis R, Harn DA. Newly established monoclonal antibody diagnostic assays for Schistosoma mansoni direct detection in areas of low endemicity. PLoS One 2014; 9:e87777. [PMID: 24498191 PMCID: PMC3909226 DOI: 10.1371/journal.pone.0087777] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 01/02/2014] [Indexed: 01/07/2023] Open
Abstract
Background Current available methods for diagnosis of schistosomiasis mansoni lack sufficient sensitivity, which results in underreporting of infectious in areas of low endemicity. Methodology/Principal Findings We developed three novel diagnostic methodologies for the direct detection of schistosome infection in serum samples. These three new methods were evaluated with positive patients from a low endemicity area in southeast Brazil. The basis of the assay was the production of monoclonal antibodies against the protein backbone of heavily glycosylated Circulating Cathodic Antigen (CCA). The antibodies were also selected for having no specificity to repeating poly-Lewis x units. Assays based on the detection CCA-protein should not encounter a limitation in sensitivity due to a biological background of this particular epitope. Three diagnostic methodologies were developed and validated, (i) Immunomagnetic Separation based on improved incubation steps of non-diluted serum, (ii) Direct Enzyme-linked Immunosorbent Assay and (iii) Fluorescent Microscopy Analysis as a qualitative assay. The two quantitative assays presented high sensitivity (94% and 92%, respectively) and specificity (100%), equivalent to the analysis of 3 stool samples and 16 slides by Kato-Katz, showing promising results on the determination of cure. Conclusions/Significance The Immunomagnetic Separation technique showed excellent correlation with parasite burden by Cohen coefficient. The qualitative method detected 47 positive individuals out of 50 with the analysis of 3 slides. This easy-to-do method was capable of discriminating positive from negative cases, even for patients with low parasite burden.
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Affiliation(s)
- Rafaella Fortini Queiroz Grenfell
- Schistosomiasis Laboratory, Rene Rachou Research Center, Oswaldo Cruz Foundation (Fiocruz), Belo Horizonte, Minas Gerais, Brazil
- Department of Infectious Diseases, College of Veterinary Medicine, and Center for Tropical and Emerging Global Diseases, University of Georgia (UGA), Athens, Georgia, United States of America
| | - Paulo Marcos Zech Coelho
- Schistosomiasis Laboratory, Rene Rachou Research Center, Oswaldo Cruz Foundation (Fiocruz), Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
| | - Diana Taboada
- Schistosomiasis Laboratory, Rene Rachou Research Center, Oswaldo Cruz Foundation (Fiocruz), Belo Horizonte, Minas Gerais, Brazil
| | - Ana Carolina Alves de Mattos
- Schistosomiasis Laboratory, Rene Rachou Research Center, Oswaldo Cruz Foundation (Fiocruz), Belo Horizonte, Minas Gerais, Brazil
| | - Ruth Davis
- Monoclonal Antibody Facility, College of Veterinary Medicine, University of Georgia (UGA), Athens, Georgia, United States of America
| | - Donald A. Harn
- Department of Infectious Diseases, College of Veterinary Medicine, and Center for Tropical and Emerging Global Diseases, University of Georgia (UGA), Athens, Georgia, United States of America
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25
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Li YS, McManus DP, Lin DD, Williams GM, Harn DA, Ross AG, Feng Z, Gray DJ. The Schistosoma japonicum self-cure phenomenon in water buffaloes: potential impact on the control and elimination of schistosomiasis in China. Int J Parasitol 2014; 44:167-71. [PMID: 24440417 DOI: 10.1016/j.ijpara.2013.10.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 10/18/2013] [Accepted: 10/21/2013] [Indexed: 11/29/2022]
Abstract
Schistosomiasis japonica, caused by Schistosoma japonicum, is an important zoonotic disease in China, the Philippines and small pockets of Indonesia. In addition to infecting people, S. japonicum can infect over 40 species of wild and domestic animals which have varying impacts on human infection. It is now generally accepted that bovines, particularly water buffaloes, are the major reservoir for human infection in China as they are naturally infected with schistosomes and deposit more eggs into the environment than humans or any other animal host. This complicates control efforts and the economic burden associated with schistosomiasis morbidity and mortality has taken its toll on both human and livestock populations. Over the last 50years, the schistosomiasis control program in China has made great strides in reducing prevalence and morbidity, and the Chinese authorities now aim to eliminate the disease nationwide in the next decade. Current Chinese control strategies place particular importance on interventions targeting bovines including: praziquantel treatment, barrier farming to prevent grazing in transmission areas, their replacement with mechanized tractors and possible bovine vaccination. A number of studies have shown that in the period following S. japonicum infection, the worm burden drops sharply in water buffaloes and some other animal hosts such as pigs. This is due to a self-cure phenomenon whereby there is parasite clearance by both immune and non-immune factors. Here we review studies investigating the self-cure effect, paying particular attention to S. japonicum infection in water buffaloes, and discuss its potential impact on the future schistosomiasis control and elimination efforts in China. Further understanding of the mechanism of self-cure in water buffaloes could be important for future schistosome vaccine design and delivery.
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Affiliation(s)
- Yue-Sheng Li
- Hunan Institute of Parasitic Diseases, World Health Organisation Collaborating Centre for Research and Control of Schistosomiasis in Lake Region, Yueyang, Hunan Province, People's Republic of China; Molecular Parasitology Laboratory, Infectious Diseases Division, Queensland Institute of Medical Research, Brisbane, Australia; School of Population Health, University of Queensland, Brisbane, Australia
| | - Donald P McManus
- Molecular Parasitology Laboratory, Infectious Diseases Division, Queensland Institute of Medical Research, Brisbane, Australia; School of Population Health, University of Queensland, Brisbane, Australia
| | - Dan-Dan Lin
- Jiangxi Institute of Parasitic Diseases, Nanchang, Jiangxi, People's Republic of China
| | - Gail M Williams
- School of Population Health, University of Queensland, Brisbane, Australia
| | - Donald A Harn
- College of Veterinary Medicine, University of Georgia, Athens, USA
| | - Allen G Ross
- Griffith Health Institute, Griffith University, Gold Coast, Australia
| | - Zheng Feng
- National Institute of Parasitic Diseases, Chinese Centre for Disease Control and Prevention, Shanghai, People's Republic of China
| | - Darren J Gray
- Molecular Parasitology Laboratory, Infectious Diseases Division, Queensland Institute of Medical Research, Brisbane, Australia; School of Population Health, University of Queensland, Brisbane, Australia.
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Abstract
Parasitic diseases caused by protozoan and helminth parasites are among the leading causes of morbidity and mortality in tropical and subtropical regions of the world. Unfortunately, at present, there is no vaccine against any human parasitic disease. Conventional vaccine methods have largely failed against parasitic infections. This is due, in part, to the complexity of the parasite life cycle, the ability of the parasite to evade the immune system, and difficulties in identifying and eliciting the desired protective immune responses. The discovery of DNA vaccines has renewed hope for vaccine development against parasites. In the last decade, DNA vaccines were successful in inducing at least partial protection against several parasitic diseases. This review discusses the latest developments in DNA vaccines against tropical parasitic diseases.
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Affiliation(s)
- Akram A Da'dara
- Department of Immunology and Infectious Disease, Harvard School of Public Health, 665 Huntington Ave, Boston, MA 02115, USA.
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27
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Olveda DU, Li Y, Olveda RM, Lam AK, McManus DP, Chau TN, Harn DA, Williams GM, Gray DJ, Ross AG. Bilharzia in the Philippines: past, present, and future. Int J Infect Dis 2014; 18:52-6. [DOI: 10.1016/j.ijid.2013.09.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 09/10/2013] [Accepted: 09/11/2013] [Indexed: 10/26/2022] Open
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Shollenberger LM, Bui CT, Paterson Y, Nyhoff L, Harn DA. HIV-1 vaccine-specific responses induced by Listeria vector vaccines are maintained in mice subsequently infected with a model helminth parasite, Schistosoma mansoni. Vaccine 2013; 31:5651-8. [PMID: 24120546 DOI: 10.1016/j.vaccine.2013.09.067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 08/30/2013] [Accepted: 09/27/2013] [Indexed: 01/07/2023]
Abstract
In areas co-endemic for helminth parasites and HIV/AIDS, infants are often administered vaccines prior to infection with immune modulatory helminth parasites. Systemic Th2 biasing and immune suppression caused by helminth infection reduces cell-mediated responses to vaccines such as tetanus toxoid and BCG. Therefore, we asked if infection with helminthes post-vaccination, alters already established vaccine induced immune responses. In our model, mice are vaccinated against HIV-1 Gag using a Listeria vaccine vector (Lm-Gag) in a prime-boost manner, then infected with the human helminth parasite Schistosoma mansoni. This allows us to determine if established vaccine responses are maintained or altered after helminth infection. Our second objective asked if helminth infection post-vaccination alters the recipient's ability to respond to a second boost. Here we compared responses between uninfected mice, schistosome infected mice, and infected mice that were given an anthelminthic, which occurred coincident with the boost or four weeks prior, as well as comparing to un-boosted mice. We report that HIV-1 vaccine-specific responses generated by Listeria vector HIV-1 vaccines are maintained following subsequent chronic schistosome infection, providing further evidence that Listeria vector vaccines induce potent vaccine-specific responses that can withstand helminth infection. We also were able to demonstrate that administration of a second Listeria boost, which markedly enhanced the immune response, was minimally impacted by schistosome infection, or anthelminthic therapy. Surprisingly, we also observed enhanced antibody responses to HIV Gag in vaccinated mice subsequently infected with schistosomes.
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Affiliation(s)
- Lisa M Shollenberger
- Department of Infectious Diseases, College of Veterinary Medicine and the Center for Tropical and Emerging Global Diseases, University of Georgia, 501 DW Brooks Drive, Athens, GA 30602-7387, USA.
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29
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Marrache S, Tundup S, Harn DA, Dhar S. Ex vivo programming of dendritic cells by mitochondria-targeted nanoparticles to produce interferon-gamma for cancer immunotherapy. ACS Nano 2013; 7:7392-7402. [PMID: 23899410 DOI: 10.1021/nn403158n] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
One of the limitations for clinical applications of dendritic cell (DC)-based cancer immunotherapy is the low potency in generating tumor antigen specific T cell responses. We examined the immunotherapeutic potential of a mitochondria-targeted nanoparticle (NP) based on a biodegradable polymer and zinc phthalocyanine (ZnPc) photosensitizer (T-ZnPc-NPs). Here, we report that tumor antigens generated from treatment of breast cancer cells with T-ZnPc-NPs upon light stimulation activate DCs to produce high levels of interferon-gamma, an important cytokine considered as a product of T and natural killer cells. The remarkable ex vivo DC stimulation ability of this tumor cell supernatant is a result of an interleukin (IL)-12/IL-18 autocrine effect. These findings contribute to the understanding of how in situ light activation amplifies the host immune responses when NPs deliver the photosensitizer to the mitochondria and open up the possibility of using mitochondria-targeted-NP-treated, light-activated cancer cell supernatants as possible vaccines.
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Affiliation(s)
- Sean Marrache
- NanoTherapeutics Research Laboratory, Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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30
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Marrache S, Choi JH, Tundup S, Zaver D, Harn DA, Dhar S. Immune stimulating photoactive hybrid nanoparticles for metastatic breast cancer. Integr Biol (Camb) 2013; 5:215-23. [PMID: 22832596 DOI: 10.1039/c2ib20125a] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A therapeutic technology that combines the phototoxic and immune-stimulating ability of photodynamic therapy (PDT) with the widespread effectiveness of the immune system can be very promising to treat metastatic breast cancer. We speculated that the knowledge of molecular mechanisms of existing multi-component therapies could provide clues to aid the discovery of new combinations of an immunostimulant with a photosensitizer (PS) using a nanoparticle (NP) delivery platform. Therapeutic challenges when administering therapeutic combinations include the choice of dosages to reduce side effects, the definitive delivery of the correct drug ratio, and exposure to the targets of interest. These factors are very difficult to achieve when drugs are individually administered. By combining controlled release polymer-based NP drug delivery approaches, we were able to differentially deliver zinc phthalocyanine (ZnPc) based PS to metastatic breast cancer cells along with CpG-ODN, a single-stranded DNA that is a known immunostimulant to manage the distant tumors in a temporally regulated manner. We encapsulated ZnPc which is a long-wavelength absorbing PS within a polymeric NP core made up of poly(d,l-lactic-co-glycolic acid)-b-poly(ethylene glycol) (PLGA-b-PEG). After coating the outside of the polymeric core with gold NPs (AuNPs), we further modified the AuNP surface with CpG-ODN. In vitro cytotoxicity using 4T1 metastatic mouse breast carcinoma cells shows significant photocytotoxicity of the hybrid NPs containing both ZnPc and CpG-ODN after irradiation with a 660 nm LASER light and this activity was remarkably better than either treatment alone. Treatment of mouse bone marrow derived dendritic cells with the PDT-killed 4T1 cell lysate shows that the combination of PDT with a synergistic immunostimulant in a single NP system results in significant immune response, which can be used for the treatment of metastatic cancer.
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Affiliation(s)
- Sean Marrache
- Nano Therapeutics Research Lab, Department of Chemistry, University of Georgia, Athens, GA 30602, USA
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31
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Grenfell R, Harn DA, Tundup S, Da'dara A, Siqueira L, Coelho PMZ. New approaches with different types of circulating cathodic antigen for the diagnosis of patients with low Schistosoma mansoni load. PLoS Negl Trop Dis 2013; 7:e2054. [PMID: 23469295 PMCID: PMC3585039 DOI: 10.1371/journal.pntd.0002054] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 12/26/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Schistosomiasis mansoni is a debilitating and sometimes fatal disease. Accurate diagnosis plays a key role in patient management and infection control. However, currently available parasitological methods are laborious and lack sensitivity. The selection of target antigen candidates has turned out to be a promising tool for the development of more sensitive diagnostic methods. In our previous investigations, the use of crude antigens led to false-positive results. Recently, focus has been given to highly purified Schistosoma mansoni antigens, especially to circulating antigens. METHOD Thus, our main goal was to test different types of circulating cathodic antigen glycoprotein (CCA), as "crude antigen," the protein chain of recombinant CCA and two individual peptides. These schistosome proteins/peptides were tested in a new diagnostic method employing immunomagnetic separation based on the improvement of antigen-antibody binding. PRINCIPAL FINDINGS Use of recombinant CCA as a diagnostic antigen allowed us to develop a diagnostic assay with high sensitivity and specificity with no false-negative results. Interestingly, the "crude antigen" worked as a good marker for control of cure after praziquantel treatment. CONCLUSIONS/SIGNIFICANCE Our new diagnostic method was superior to enzyme-linked immunosorbent assay in diagnosing low endemicity patients.
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Affiliation(s)
- Rafaella Grenfell
- Schistosomiasis Laboratory, Rene Rachou Research Center, Oswaldo Cruz Foundation (Fiocruz), Belo Horizonte, Minas Gerais, Brazil
- Department of Infectious Diseases, College of Veterinary Medicine and the Center for Tropical and Emerging Diseases, University of Georgia, Athens, Georgia, United States of America
| | - Donald A. Harn
- Department of Infectious Diseases, College of Veterinary Medicine and the Center for Tropical and Emerging Diseases, University of Georgia, Athens, Georgia, United States of America
| | - Smanla Tundup
- Department of Infectious Diseases, College of Veterinary Medicine and the Center for Tropical and Emerging Diseases, University of Georgia, Athens, Georgia, United States of America
| | - Akram Da'dara
- Tufts University, Grafton, Massachusetts, United States of America
| | - Liliane Siqueira
- Schistosomiasis Laboratory, Rene Rachou Research Center, Oswaldo Cruz Foundation (Fiocruz), Belo Horizonte, Minas Gerais, Brazil
| | - Paulo Marcos Zech Coelho
- Schistosomiasis Laboratory, Rene Rachou Research Center, Oswaldo Cruz Foundation (Fiocruz), Belo Horizonte, Minas Gerais, Brazil
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Olveda DU, Li Y, Olveda RM, Lam AK, Chau TNP, Harn DA, Williams GM, Gray DJ, Ross AGP. Bilharzia: Pathology, Diagnosis, Management and Control. ACTA ACUST UNITED AC 2013; 1. [PMID: 25346933 DOI: 10.4172/2329-9088.1000135] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
More than one billion people travel internationally each year and approximately 100 million to the tropics. Schistosomiasis is a neglected tropical disease caused by trematode blood flukes of the genus Schistosoma. It currently infects over 250 million people worldwide and results in approximately 25 million disability adjusted life years lost. Clinical manifestations depend on the affected organ. Subtle morbidities have also been documented including: growth retardation, anaemia and poor cognitive function in children. While schistosomiasis has been eradicated from Japan and significantly reduced in parts of China and Egypt, transmission in many other regions remains ongoing due to the wide-spread distribution of the intermediate snail host, poor sanitation, lack of health education and decreasing compliance to mass drug administration. Integrated control has significantly reduced the burden of disease in China but considerable financial capital is needed if similar results are to be duplicated elsewhere. Human vaccination is in various stages of development, and once found, will become an integral part of future control. This comprehensive review examines the epidemiology, pathology, diagnosis, clinical management, prevention and control of the disease.
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Affiliation(s)
- David U Olveda
- Griffith Health Institute, Griffith University, Gold Coast Campus, Australia
| | - Yuesheng Li
- Hunan Institute of Parasitic Diseases, WHO Collaborating Centre for Research and Control of Schistosomiasis on Lake Region, China and Queensland Institute of Medical Research, Australia
| | - Remigio M Olveda
- Research Institute for Tropical Medicine, Department of Health, Philippines
| | - Alfred K Lam
- Griffith Health Institute, Griffith University, Gold Coast Campus, Australia
| | - Thao N P Chau
- Flinders University, Discipline of Public Health, Australia
| | - Donald A Harn
- College of Veterinary Medicine, University of Georgia, USA
| | - Gail M Williams
- School of Population Health, University of Queensland, Brisbane, Australia
| | - Darren J Gray
- School of Population Health, University of Queensland, Brisbane, Australia
| | - Allen G P Ross
- Griffith Health Institute, Griffith University, Gold Coast Campus, Australia
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Bhargava P, Li C, Stanya KJ, Jacobi D, Dai L, Liu S, Gangl MR, Harn DA, Lee CH. Immunomodulatory glycan LNFPIII alleviates hepatosteatosis and insulin resistance through direct and indirect control of metabolic pathways. Nat Med 2012; 18:1665-72. [PMID: 23104131 PMCID: PMC3493877 DOI: 10.1038/nm.2962] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 08/30/2012] [Indexed: 02/06/2023]
Abstract
Parasitic worms express host-like glycans to attenuate the immune response of human hosts. The therapeutic potential of this immunomodulatory mechanism in controlling metabolic dysfunction associated with chronic inflammation remains unexplored. We demonstrate here that administration of Lacto-N-fucopentaose III (LNFPIII), a LewisX containing immunomodulatory glycan found in human milk and on parasitic helminths, improves glucose tolerance and insulin sensitivity in diet-induced obese mice. This effect is mediated partly through increased Il-10 production by LNFPIII activated macrophages and dendritic cells, which reduces white adipose tissue inflammation and sensitizes the insulin response of adipocytes. Concurrently, LNFPIII treatment up-regulates nuclear receptor Fxr-α (or Nr1h4) to suppress lipogenesis in the liver, conferring protection against hepatosteatosis. At the signaling level, the extracellular signal-regulated kinase (Erk)-Ap1 pathway appears to mediate the effects of LNFPIII on both inflammatory and metabolic pathways. Our results suggest that LNFPIII may provide novel therapeutic approaches to treat metabolic diseases.
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Affiliation(s)
- Prerna Bhargava
- Department of Genetics and Complex Diseases, Division of Biological Sciences, Harvard School of Public Health, Boston, MA, USA
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Dutta P, Hullett DA, Roenneburg DA, Torrealba JR, Sollinger HW, Harn DA, Burlingham WJ. Lacto-N-fucopentaose III, a pentasaccharide, prolongs heart transplant survival. Transplantation 2011; 90:1071-8. [PMID: 20885339 DOI: 10.1097/tp.0b013e3181f8f296] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Lacto-N-fucopentaose III (LNFPIII) is a pentasaccharide containing the Lewis(x) trisaccharide that is found on schistosome eggs and in breast milk. LNFPIII conjugates suppress host immune responses and have therapeutic efficacy in mouse models of psoriasis and type 1 diabetes. METHODS We used nonvascularized neonatal ear-heart transplantation and heterotopic vascularized heart transplantation models to evaluate immunosuppressive effects of LNFPIII and subsequently analyzed the mechanism. RESULTS We found that administration of LNFPIII conjugates prolonged median graft survival by 80% when 1-day-old DBA/2 hearts were transplanted into ears of B6 mice. A similar graft prolongation was observed in a fully vascularized heterotopic heart transplantation model (DBA/2 into B6), No prolongation was observed with carrier protein (human serum albumin [HSA] or dextran) alone. We found increased programmed death ligand 1 (PD-L1) expression on F4/80 macrophages, CD4+ T cells, and CD11b+ CD11c+ (myeloid) dendritic cells, and increased arginase1 and Ym1 expression, typical of alternatively activated macrophages, in the draining (cervical) lymph node cells. We found accumulation of Foxp3+ regulatory T cells (Tregs) in the lymph nodes draining donor hearts, suggesting a possible role of Treg induction in graft prolongation. Anti-PD-L1 antibody treatment abrogated LNFPIII-mediated the graft survival benefit and Treg accumulation. LNFPIII-treated macrophages had increased PD-L1 expression and significantly prolonged DBA/2 allograft survival when injected intraperitoneally into B6 recipient mice. CONCLUSIONS LNFPIII prolongs fully allogeneic graft survival in both vascularized and nonvascularized allograft transplantation models. The mechanism of graft prolongation seems to involve both alternatively activated PDL-1 macrophages and recruitment of Foxp3+ Treg cells.
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Affiliation(s)
- Partha Dutta
- Department of Surgery, School of Medicine and Public Health, University of Wisconsin, Madison, WI, USA
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Wang Y, Da'Dara AA, Thomas PG, Harn DA. Dendritic cells activated by an anti-inflammatory agent induce CD4(+) T helper type 2 responses without impairing CD8(+) memory and effector cytotoxic T-lymphocyte responses. Immunology 2009; 129:406-17. [PMID: 19922421 DOI: 10.1111/j.1365-2567.2009.03193.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Prevalence of pro-inflammatory diseases is rising in developed country populations. The increase in these diseases has fuelled the search for new, immune suppressive, anti-inflammatory therapies, which do not impact, or minimally impact, CD4(+) and/or CD8(+) T-cell-mediated immunity. The goal of this study was to determine if antigen-presenting cells (APCs) activated by the anti-inflammatory oligosaccharide, lacto-N-fucopentaose III (LNFPIII), would have an impaired ability to drive CD4(+) T helper (Th) or CD8(+) memory and effector T-cell responses. To investigate this we activated splenic dendritic cells (SDCs) with LNFPIII and examined their ability to drive antigen-specific CD4(+) Th, and CD8(+) memory and cytotoxic T-cell (CTL) responses compared with lipopolysaccharide (LPS) -stimulated SDCs. The LNFPIII-activated SDCs had altered co-stimulatory molecule expression compared with LPS-stimulated SDCs, while the levels of SDC chemokines following activation by either compound were similar. LNFPIII-activated SDCs produced significantly lower levels of interleukin-12 but surprisingly higher levels of interleukin-6 than LPS-activated SDCs. Similar to previous studies using bone-marrow-derived DCs, LNFPIII-activated SDCs induced strong Th2 responses in vivo and ex vivo. LNFPIII activation of APCs was independent of the Toll-interleukin-1 receptor adaptor myeloid differentiating factor 88. Importantly, LNFPIII-matured DCs induced CD8(+) memory and effector CTL responses similar to those driven by LPS-matured DCs, including the frequency of interferon-gamma-producing CD8(+) T cells and induction of CTL effectors. Treatment of APCs by the anti-inflammatory glycan LNFPIII did not impair their ability to drive CD8(+) effector and memory cell-mediated immunity.
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Affiliation(s)
- Yang Wang
- School of Biochemistry & Molecular Biology, Australian National University, Linnaeus Way, Canberra, Australia
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Da'dara AA, Li YS, Xiong T, Zhou J, Williams GM, McManus DP, Feng Z, Yu XL, Gray DJ, Harn DA. DNA-based vaccines protect against zoonotic schistosomiasis in water buffalo. Vaccine 2008. [PMID: 18524429 DOI: 10.1016/j.vaccine.2008.04.08] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Schistosomiasis japonica is an endemic, zoonotic disease of major public health importance in China where water buffaloes account for approximately 75% of disease transmission. Interventions that reduce schistosome infection in water buffaloes will enhance their health simultaneously reducing disease transmission to humans. While chemotherapy has proved successful, it requires continued time consuming and expensive mass treatments. A more sustainable option would be development of vaccines that reduce transmission of S. japonicum from bovines to replace bovine chemotherapy. We performed two randomized double blind trials in water buffaloes to determine if DNA vaccines encoding triose-phosphate isomerase (SjCTPI), or the tetraspanin 23 kDa integral membrane protein (SjC23), alone or fused to bovine heat shock protein 70 (Hsp70) could induce a level of immunity conducive to long-term sustainable control. Groups of water buffaloes (15/group) received three intramuscular injections, 4 weeks apart. Booster immunizations were co-administered with a plasmid DNA encoding IL-12. Four weeks after the last injection, water buffaloes were challenged with 1000 cercariae, and vaccine efficacy analyzed 8 weeks later. Water buffaloes vaccinated with SjCTPI-Hsp70 or SjCTPI plasmids had worm burdens reduced by 51.2% and 41.5%, respectively. Importantly, fecal miracidial hatching was reduced by 52.1% and 33.2% respectively compared to control vaccinated water buffaloes. Vaccination with SjC23-Hsp70 and SjC23 plasmids reduced worm burdens by 50.9% and 45.5%, respectively, and fecal miracidial hatching by 52.0% and 47.4%. A mathematical model of schistosome transmission predicts that schistosome vaccines capable of reducing water buffaloes' fecal egg output by 45%, alone or in conjunction with praziquantel treatment, will lead to a significant reduction in transmission of schistosomiasis. Both DNA vaccines tested here exceed this hypothetical level. Indeed, mathematical modeling of SjCTPI-Hsp70 and SjC23-Hsp70 alone and in conjunction with human chemotherapy showed a significant reduction in transmission almost to the point of elimination.
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Affiliation(s)
- Akram A Da'dara
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115, USA
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Reis EAG, Mauadi Carmo TA, Athanazio R, Reis MG, Harn DA. Schistosoma mansoni triose phosphate isomerase peptide MAP4 is able to trigger naïve donor immune response towards a type-1 cytokine profile. Scand J Immunol 2008; 68:169-76. [PMID: 18565118 DOI: 10.1111/j.1365-3083.2008.02131.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We evaluated the ability of naïve monocyte-derived dendritic cells (DC) to sensitize autologous peripheral blood mononuclear cells (PBMC) to the schistosome vaccine candidate MAP4 using a priming in vitro (PIV) assay. MAP4 is a multiple antigen peptide containing B- and T-cell epitopes derived from the glycolytic enzyme triose phosphate isomerase. PBMC primed and restimulated with MAP4 first and secondary recalls (MAP4 PIV cells) were examined for cell phenotype and cytokine production. We found that after the first recall stimulation with MAP4, the major cell population was predominantly CD4(+) T-cell subsets (68.5%), CD8(+high) (16%) and CD19(+) (10%). Additionally, MAP4 PIV cells significantly expressed CD4(+)-HLA-DR(+), -CD54(+), -CD45RO(+) (P < 0.0001) and -CD25(+) (P < 0.0004) together with significant expression of CD80(+) on CD19(+) B cells (P < 0.007). Cytokine production from activated MAP4 PIV cells was predominantly Th1-like, consisting mainly of IFN-gamma. Interestingly, IFN-gamma production was suppressed when Schistosoma mansoni-soluble egg antigen (SEA) was added to a MAP4 PIV cell culture. Furthermore, addition of MAP4 to a SEA PIV cell culture significantly reduced secretion of IL-10. The present findings add to the knowledge gained from studies in the mouse model, and our results show that naïve donor DC, sensitized with MAP4, were able to prime and clonally expand MAP4-specific T cells towards a Th1-type response.
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Affiliation(s)
- E A G Reis
- Oswaldo Cruz Foundation (FIOCRUZ), Salvador, Bahia, Brazil.
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Da'dara AA, Li YS, Xiong T, Zhou J, Williams GM, McManus DP, Feng Z, Yu XL, Gray DJ, Harn DA. DNA-based vaccines protect against zoonotic schistosomiasis in water buffalo. Vaccine 2008; 26:3617-25. [PMID: 18524429 PMCID: PMC2567122 DOI: 10.1016/j.vaccine.2008.04.080] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2008] [Revised: 04/22/2008] [Accepted: 04/29/2008] [Indexed: 01/23/2023]
Abstract
Schistosomiasis japonica is an endemic, zoonotic disease of major public health importance in China where water buffaloes account for approximately 75% of disease transmission. Interventions that reduce schistosome infection in water buffaloes will enhance their health simultaneously reducing disease transmission to humans. While chemotherapy has proved successful, it requires continued time consuming and expensive mass treatments. A more sustainable option would be development of vaccines that reduce transmission of S. japonicum from bovines to replace bovine chemotherapy. We performed two randomized double blind trials in water buffaloes to determine if DNA vaccines encoding triose-phosphate isomerase (SjCTPI), or the tetraspanin 23 kDa integral membrane protein (SjC23), alone or fused to bovine heat shock protein 70 (Hsp70) could induce a level of immunity conducive to long-term sustainable control. Groups of water buffaloes (15/group) received three intramuscular injections, 4 weeks apart. Booster immunizations were co-administered with a plasmid DNA encoding IL-12. Four weeks after the last injection, water buffaloes were challenged with 1000 cercariae, and vaccine efficacy analyzed 8 weeks later. Water buffaloes vaccinated with SjCTPI-Hsp70 or SjCTPI plasmids had worm burdens reduced by 51.2% and 41.5%, respectively. Importantly, fecal miracidial hatching was reduced by 52.1% and 33.2% respectively compared to control vaccinated water buffaloes. Vaccination with SjC23-Hsp70 and SjC23 plasmids reduced worm burdens by 50.9% and 45.5%, respectively, and fecal miracidial hatching by 52.0% and 47.4%. A mathematical model of schistosome transmission predicts that schistosome vaccines capable of reducing water buffaloes' fecal egg output by 45%, alone or in conjunction with praziquantel treatment, will lead to a significant reduction in transmission of schistosomiasis. Both DNA vaccines tested here exceed this hypothetical level. Indeed, mathematical modeling of SjCTPI-Hsp70 and SjC23-Hsp70 alone and in conjunction with human chemotherapy showed a significant reduction in transmission almost to the point of elimination.
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Affiliation(s)
- Akram A Da'dara
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115, USA
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Atochina O, Da'dara AA, Walker M, Harn DA. The immunomodulatory glycan LNFPIII initiates alternative activation of murine macrophages in vivo. Immunology 2008; 125:111-21. [PMID: 18373667 DOI: 10.1111/j.1365-2567.2008.02826.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The early pathogen-macrophage interactions that help drive macrophage maturation towards classically or alternatively activated are largely unknown. To examine this question we utilized the immunomodulatory glycan Lacto-N-fucopentaose III (LNFPIII), which contains the Lewis X (LeX) trisaccharide, to activate murine peritoneal macrophages in vivo. Because LNFPIII is known to induce anti-inflammatory responses, we asked if LNFPIII stimulation of macrophages in vivo initiates alternative activation events such as upregulation of Arginase 1, Ym1, FIZZ-1, MGL-1 or macrophage mannose receptor (MMR). Examination of peritoneal exudate cells from mice 20 hr post-LNFPIII injection demonstrated increased Arginase 1 activity, at the mRNA and protein levels, coincident with undetectable inducible nitric oxide synthase expression or nitric oxide production. In addition to Arginase 1, Ym1 expression was also significantly upregulated at 20 and 48 hr after LNFPIII exposure in vivo. However, the expression of FIZZ-1, MGL-1, and MMR was not changed in these macrophages. In an attempt to determine activation requirements for functional activity, we adoptively transferred antigen-pulsed, in vivo LNFPIII activated macrophages into naïve recipients and found that they were capable of triggering recipient T cells to secrete elevated levels of interleukin (IL)-10 and IL-13 compared to mice receiving control macrophages. Together, these data demonstrate that upregulation of expression of Arginase 1 and Ym1 occur very early in activation of macrophages, and can be independent of other alternatively activated (AA) macrophage markers. Importantly, these early events appear to be IL-4/IL-13-independent in our model. In the future we hope to determine if upregulation of these initial AA maturational events is sufficient for these macrophages to exert immunoregulatory activity in vivo.
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Affiliation(s)
- Olga Atochina
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA.
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Yu XL, He YK, Xiong T, Zhao YQ, Shi MZ, Zhou J, Liu ZC, Luo XS, Fu X, He HB, Harn DA, Li YS. [Protective effects of co-immunization with SjCTPI-Hsp70 and interleukin-12 DNA vaccines against Schistosoma japonicum challenge infection in water buffalo]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2006; 24:433-6. [PMID: 17366973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
OBJECTIVE To induce protective effect of co-immunization with S. japonicum triose-phosphate isomerase fused to heat shock protein 70 (SjCTPI-Hsp70) plasmid and interleukin-12 (IL-12) DNA vaccines against Schistosoma japonicum (Chinese strain) infection in water buffalo. METHODS Forty-five 8-10 months-old water buffalo from a nonendemic area were divided into three treatment groups each with fifteen buffalo: experimental group A (SjCTPI-Hsp70+IL-12, 300 microg), experimental group B (SjCTPI+IL-12, 300 microg), and control group C (pVAX+IL-12, 300 microg). All buffalo were immunized with a series of 3 intramuscular injections administered once every four weeks. Twenty-eight days postvaccination, water buffalo were percutaneously challenged with 1000 S. japonicum cercariae. Fecal examinations were conducted two days prior, one day prior, and on perfusion day, and the number of hatching miracidia and eggs per gram feces were recorded. Fifty-six days post-infection, the buffalo were sacrificed and perfused via the descending aorta. The recovered adult worms and eggs in liver tissue were counted. RESULTS Groups A and B showed a worm reduction rate of 51.2% and 41.5% (chi2=1.89, P>0.05)), female worm reduction of 48.9% and 44.7% (chi2=0.35,P>0.05), fecal egg reduction of 52.1% and 38.3% (chi2=3.84,P<0.05), a reduction of miracidia-hatching rate by 52.1% and 33.2% (chi2=7.30, P<0.01), and liver egg reduction of 61.5% and 42.0% (chi2=7.61 , P<0.01), respectively. CONCLUSION Co-immunization with SjCTPI-Hsp70 and IL-12 DNA vaccines induces protective immunity against S. japonicum in water buffalo.
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Affiliation(s)
- Xin-Ling Yu
- Hunan Institute of Parasitic Disease, Yueyang 414000, China
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Zhu Y, Si J, Harn DA, Xu M, Ren J, Yu C, Liang Y, Yin X, He W, Cao G. Schistosoma japonicum triose-phosphate isomerase plasmid DNA vaccine protects pigs against challenge infection. Parasitology 2006; 132:67-71. [PMID: 16393355 DOI: 10.1017/s0031182005008644] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2005] [Revised: 06/22/2005] [Accepted: 06/22/2005] [Indexed: 11/06/2022]
Abstract
The protective efficacy of a Schistosoma japonicum, Chinese strain, triose-phosphate isomerase (TPI) plasmid DNA vaccine was examined in naïve pigs. Pigs were vaccinated with the TPI DNA-plasmid alone, or in conjunction with IL-12 as pcDNA3.1-P35, pcDNA3.1-P40 plasmids via intramuscular injection. Control pigs were immunized with equivalent amounts of pcDNA3.1. Pigs were immunized 3 times at 21-day intervals and challenged 30 days after the final boost. Forty-five days post-challenge, pigs were sacrificed and perfused to compare adult worm burdens, female worm burdens, liver egg burdens and granuloma size. We found that pigs vaccinated with SjCTPI DNA alone had adult worm burdens reduced by 48.3% and that a further decrease in adult worm burdens was not seen in the group vaccinated with SjCTPI DNA in conjunction with IL-12 (46.2% reduction). The SjCTPI DNA vaccines had a more pronounced effect on reducing female worm burdens i.e. 53.6% SjCTPI alone and 59.6% for SjCTPI+IL-12. Vaccination with SjCTPI-DNA reduced liver eggs by 49.4% and this response was significantly enhanced by the addition of IL-12 (65.8% reduction in liver eggs). In addition to the dramatic protective effects seen in vaccinated pigs, we also noted that granuloma size was reduced by 42% in both groups. Thus, vaccination of pigs and other large animals in China with SjCTPI DNA vaccine will likely reduce transmission by reducing adult worm burdens and worm egg output and simultaneously reduce hepatic egg-associated pathology.
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Affiliation(s)
- Y Zhu
- Jiangsu Institute of Parasitic Diseases, Wuxi, Jiangsu 214064, PR China.
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Da'Dara AA, Lautsch N, Dudek T, Novitsky V, Lee TH, Essex M, Harn DA. Helminth infection suppresses T-cell immune response to HIV-DNA-based vaccine in mice. Vaccine 2006; 24:5211-9. [PMID: 16675073 DOI: 10.1016/j.vaccine.2006.03.078] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2006] [Revised: 03/21/2006] [Accepted: 03/24/2006] [Indexed: 10/24/2022]
Abstract
A number of HIV-1 vaccines are in various phases of clinical trials and many more are in the developmental pipeline. Vaccines are especially needed for developing countries where morbidity and mortality due to HIV/AIDS is most severe, the prevalence of HIV infection is highest, and its incidence is often still rising dramatically. Individuals living in these regions are often infected with one or more helminth parasites which systemically bias the immune system towards Th2-type as well as drive immune anergy. The goal of this study was to develop a multi-T-cell epitope DNA-based vaccine for HIV-1 subtype C and to determine the impact of helminth infection on the immune response to this vaccine. We found that vaccination of naïve mice with the multi-epitope vaccine, designated TD158, induced a strong HIV-1C-specific T-cell immune response, and that the addition of the Igkappa leader sequence to the TD158 vaccine construct significantly increased the frequencies of IFN-gamma secreting CD8+ T cells. However, the TD158 vaccine specific response of mice infected with the human helminth Schistosoma mansoni was significantly suppressed. The impact of schistosome infection on suppressing the virus-specific immune response was the same whether mice were vaccinated with the TD158 vaccine or with the Igkappa enhanced TD158. The results of this study suggest that helminth infection may pose a serious problem for vaccination with the DNA-based HIV-1 vaccine in developing country populations, and that the prevalence of helminth infections in the vaccine cohorts should be taken into account for HIV-1 vaccine trial design.
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Affiliation(s)
- Akram A Da'Dara
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115, USA.
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Ganley-Leal LM, Guarner J, Todd CW, Da'Dara AA, Freeman GL, Boyer AE, Harn DA, Secor WE. Comparison of Schistosoma mansoni irradiated cercariae and Sm23 DNA vaccines. Parasite Immunol 2005; 27:341-9. [PMID: 16149992 DOI: 10.1111/j.1365-3024.2005.00785.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Immunization with defined antigens is generally less effective at inducing host protection against experimental infection with Schistosoma mansoni than vaccination with attenuated infective cercariae. We predicted that quantitative and/or qualitative differences existed between the immune responses generated to attenuated cercariae and those induced by defined antigens. Thus, we compared immune responses typically associated with protection in the murine model between animals vaccinated with attenuated cercariae and mice immunized with DNA encoding Sm23, a schistosome integral membrane protein that has previously been shown to confer protection. Mice vaccinated three times with attenuated cercariae demonstrated higher levels of protection than Sm23-vaccinated animals but spleen cells from Sm23 DNA vaccinated mice produced significantly higher levels of schistosome antigen-specific IFN-gamma. Both vaccines induced similar levels of Sm23-specific antibody and post-challenge dermal inflammation. However, the pulmonary inflammatory responses following challenge were much less pronounced in DNA immunized animals compared to those receiving irradiated cercariae. Thus, although Sm23 DNA vaccination effectively induced parasite-specific IFN-gamma and antibody responses, it failed to evoke other critical responses needed for optimal vaccine efficacy.
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Affiliation(s)
- L M Ganley-Leal
- Division of Parasitic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
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Thomas PG, Carter MR, Da'dara AA, DeSimone TM, Harn DA. A helminth glycan induces APC maturation via alternative NF-kappa B activation independent of I kappa B alpha degradation. J Immunol 2005; 175:2082-90. [PMID: 16081774 DOI: 10.4049/jimmunol.175.4.2082] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Activation of APCs via TLRs leads to activation of NF-kappaB, a key transcription factor in cells of the immune system most often associated with induction of Th1-type and proinflammatory responses. The neoglycoconjugate lacto-N-fucopentaose III (12-25 molecules)-dextran (LNFPIII-Dex) activates dendritic cells (DCs) via TLR4, as does LPS. However, unlike LPS, LNFPIII-Dex-activated cells induce Th2-type CD4+ T cell responses. This observation led us to ask whether LNFPIII-activated APCs were differentially activating NF-kappaB, and if so, could this partly account for how DCs mature in response to these two different pathogen-associated molecular patterns (PAMPs). In this study, we show that LNFPIII-Dex stimulation of APCs induces rapid, but transient NF-kappaB translocation and activity in the nucleus, in comparison with the persistent activation induced by LPS. We then demonstrate that transient vs persistent NF-kappaB activation has important implications in the development of the APC phenotype, showing that the second wave of NF-kappaB translocation in response to LPS is required for production of the proinflammatory mediator NO. In contrast to LPS, LNFPIII-stimulated APCs that only transiently activate NF-kappaB do not induce degradation of the known IkappaB family members or production of NO. However, cells stimulated with LNFPIII rapidly accumulate p50, suggesting that an alternative p105 degradation-dependent mechanism is primarily responsible for NF-kappaB activation downstream of LNFPIII. Finally, we show that while NF-kappaB translocation in LNFPIII-stimulated APCs is transient, it is required for the development of the DC 2 phenotype, confirming a crucial and multifaceted role for NF-kappaB in innate immune responses.
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Affiliation(s)
- Paul G Thomas
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA
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Abstract
Schistosomes infect between 200 and 300 million people at any one time. A major strategy to reduce the impact of schistosomiasis on human health is the development of a defined antigen vaccine. Protective immunity induced in mice by irradiated cercariae may serve as a model for the development of a vaccine. In such vaccinated mice, worm burdens resulting from challenge infection can be reduced by more than 90% compared to non-vaccinated mice. During the past three decades, the irradiated-carcariae vaccine model has been dissected in the detail in order to determine factors that may be relevant to vaccination, such as the participating immune compartments, the site and kinetics of the immune response, and the antigens recognized. In this review, Dania Richter, Donald A. Harn and Franz-Rainer Matuschka highlight the research on the vaccine model, focusing on the murine model using gamma-irradiated cercariae of Schistosoma mansoni.
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Affiliation(s)
- D Richter
- Department of Tropical Public Health, Harvard School of Public Health, Boston, MA 02115, USA.
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Zhao S, Zhu YC, Harn DA, Si J, Ren JG, Yin XR, He W, Liang YS, Xu M, Xu YL. [Enhancement of the protective effect of SjC23 DNA vaccine against Schistosoma japonicum infection by immunostimulatory sequence]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2005; 23:1-5. [PMID: 16042196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
OBJECTIVE To investigate the effect of immunostimulatory sequence on SjC23 DNA vaccine against Schistosoma japonicum infection. METHODS SjC23 gene fragment was inserted into pcDNA3. 1-CpG to construct pcDNA3.1-SjC23/CpG. BALB/c mice in 4 groups were immunized intramuscularly 3 times at 2 week intervals, with 100 microg plasmid DNA per injection. Four weeks after the 3rd immunization, all mice were challenged with 45 +/- 1 cercariae of S. japonicum by abdominal skin penetration. After 45 days post-challenge, mice were perfused and the number of recovered worms and of eggs in liver was counted. Blood samples were collected from the tail vein of all mice 2 days before the 1st immunization and before challenge respectively. IgG, IgG1 and IgG2a in sera were detected. Three weeks after the 3rd inoculation, the spleen cells of 2 mice from each group were cultured and stimulated with ConA and recombinant peptide. The supernatant was collected to detect IL-2, IL-4 and IFN-gamma. Simultaneously, the cytotoxic activity was detected with 51Cr release assay in vitro. RESULTS The worm reduction rate in SjC23 group and SjC23/CpG group was 28.1% and 35.1%, the hepatic egg reduction rate was 21.6% and 26.5%, respectively, compared with the control group. The level of protection in SjC23/CpG group was higher than that in SjC23 group (P<0.05). ELISA results indicated that mice immunized with pcDNA3.1-SjC23 and SjC23/CpG produced specific IgG to rSjC23, while mice immunized with pcDNA3.1 and pcDNA3.1-CpG did not. Mice in SjC23 group and SjC23/CpG group also produced IgG1 and IgG2a antibody isotypes, with the ratio of IgG2a/IgG1 10.1 and 12.2, respectively. In comparison with the control, the level of IL-2 and IFN-gamma in mice immunized with pcDNA3.1-SjC23 and pcDNA3.1-SjC23/CpG was augmented. The cytotoxic activity of spleen cells from mice in SjC23/CpG group was augmented from 9.7% to 40.0% compared with that in SjC23 group. CONCLUSION The study indicates that immunostimulatory sequence appears to increase the level of protection induced by immunization with pcDNA3.1-SjC23 vaccine.
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Affiliation(s)
- Song Zhao
- Jiangsu Institute of Parasitic Diseases, Wuxi 214064, China
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Zhu Y, Si J, Harn DA, Yu C, Liang Y, Ren J, Yin X, He W, Hua W. The protective immunity of a DNA vaccine encoding Schistosoma japonicum Chinese strain triose-phosphate isomerase in infected BALB/C mice. Southeast Asian J Trop Med Public Health 2004; 35:518-22. [PMID: 15689059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
The development of a DNA vaccine for schistosomiasis japonica and testing the protective efficacy after challenge in BALB/c mice were performed. Thirty-nine female BALB/c mice were divided into three groups. Each mouse of the control group was injected intramuscularly with 100 microg of pcDNA3.1 DNA. In the TPI group, each mouse was injected with 100 microg of pcDNA3.1-SjCTPI DNA. The TPI+IL-12 group was injected with 100 microg of pcDNA3.1-SjCTPI DNA and 100 microg of the mixture of pcDNA3.1-P35 and pcDNA3.1-P40 DNA. Each mouse was immunized three times at two-week intervals and challenged with 45 cercariae of Schistosoma japonicum Chinese strain four weeks post-immunization. Then the mice were sacrificed and perfused at 45 days after challenge; the recovered worms and hepatic eggs were counted. Cytotoxic T lymphocyte (CTL) activity mediated by SjCTPI was detected with the 51Cr release assay. ELISA was performed for the detection of anti-rTPI antibodies. Anti-rTPI antibody detection with ELISA after immunization showed ten serum samples from the control group were negative, five of ten serum samples from the TPI group were weakly positive, six of ten from the TPI+IL-12 group were also weakly positive. The CTL activity of the control group was 9.1%, while CTL activities of the TPI group and the TPI+IL-12 group were 27.6% and 54.4%, respectively. The worm and egg reduction rates of TPI group and the TPI+IL-12 group were 30.2%, 52.9%, 32.7%, and 47.0%, respectively in comparison with the control group. This study further proved the possibility of the SjCTPI DNA vaccine as a potential DNA vaccine for schistosomiasis.
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Affiliation(s)
- Yinchang Zhu
- Jiangsu Institute of Parasitic Diseases, Jiangsu Provincial Key Laboratory on Molecular Biology of Parasites, Wuxi, PR China.
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Abstract
The ability of helminth parasites to drive polarized Th2 responses has been known for some time. Interestingly, many recent studies have shown that helminth-expressed glycan activation of host immune cells accounts for much of the anti-inflammatory and Th2-biasing observed. This microreview attempts to cover the biology of expression of immunomodulatory glycans in various helminth parasites, the immune cells they interact with including the production of cytokines, chemokines and antibodies. We also discuss the potential cell surface receptors which are capable of binding certain glycans and the known mech-anisms which ultimately lead to production of anti-inflammatory mediators as well as polarizing CD4+ T-cell responses to Th2-type in the host. Lastly, we discuss a novel mechanism for activation of antigen-presenting cells by a specific helminth glycan that leads to maturation of Type 2 dendritic cells.
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Affiliation(s)
- Paul G Thomas
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA
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Thomas PG, Carter MR, Atochina O, Da'Dara AA, Piskorska D, McGuire E, Harn DA. Maturation of dendritic cell 2 phenotype by a helminth glycan uses a Toll-like receptor 4-dependent mechanism. J Immunol 2004; 171:5837-41. [PMID: 14634093 DOI: 10.4049/jimmunol.171.11.5837] [Citation(s) in RCA: 235] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The biology of pathogen-associated molecular patterns (PAMPs) stimulating APCs to differentiate into a Th1-promoting phenotype has been well characterized. Conversely, not a single pathogen product that promotes a Th2 phenotype has been rigorously identified. Strong Th2 responses and dendritic cell 2 maturation are driven by helminth extracts, and carbohydrates have been shown to be responsible for much of this activity. In this study, we show that a helminth carbohydrate, lacto-N-fucopentaose III (LNFPIII) functions as an innate Th2 promoter via its action on murine dendritic cells, with the alpha1-3-linked fucose required for this activity. In contrast to Th1-type PAMPs, which activate extracellular signal-regulated kinase, c-Jun N-terminal kinase, and p38 mitogen-activated protein kinases, the Th2 PAMP LNFPIII preferentially activates extracellular signal-regulated kinase. Furthermore, the ability of LNFPIII to drive DC2 maturation is dependent on signaling via Toll-like receptor 4. These data support a new understanding of how APCs integrate signaling pathways to produce a Th1- or Th2-promoting phenotype.
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Affiliation(s)
- Paul G Thomas
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA
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