1
|
Cardoso de Souza Z, Humberto Xavier Júnior F, Oliveira Pinheiro I, de Souza Rebouças J, Oliveira de Abreu B, Roberto Ribeiro Mesquita P, de Medeiros Rodrigues F, Costa Quadros H, Manuel Fernandes Mendes T, Nguewa P, Marques Alegretti S, Paiva Farias L, Rocha Formiga F. Ameliorating the antiparasitic activity of the multifaceted drug ivermectin through a polymer nanocapsule formulation. Int J Pharm 2023; 639:122965. [PMID: 37084836 DOI: 10.1016/j.ijpharm.2023.122965] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 03/30/2023] [Accepted: 04/13/2023] [Indexed: 04/23/2023]
Abstract
Ivermectin (IVM) is a potent antiparasitic widely used in human and veterinary medicine. However, the low oral bioavailability of IVM restricts its therapeutic potential in many parasitic infections, highlighting the need for novel formulation approaches. In this study, poly(ε-caprolactone) (PCL) nanocapsules containing IVM were successfully developed using the nanoprecipitation method. Pumpkin seed oil (PSO) was used as an oily core in the developed nanocapsules. Previously, PSO was chemically analyzed by headspace solid-phase microextraction coupled to gas chromatography/mass spectrometry (HS-SPME/GC-MS). The solubility of IVM in PSO was found to be 4,266.5 ± 38.6 μg/mL. In addition, the partition coefficient of IVM in PSO/water presented a logP of 2.44. A number of nanocapsule batches were produced by factorial design resulting in an optimized formulation. Negatively charged nanocapsules measuring around 400 nm demonstrated unimodal size distribution, and presented regular spherical morphology under transmission electron microscopy. High encapsulation efficiency (98-100%) was determined by HPLC. IVM-loaded capsules were found to be stable in nanosuspensions at 4°C and 25°C, with no significant variations in particle size observed over a period of 150 days. Nanoencapsulated IVM (0.3 mM) presented reduced toxicity to J774 macrophages and L929 fibroblasts compared to free IVM. Moreover, IVM-loaded nanocapsules also demonstrated enhanced in vitro anthelmintic activity against Strongyloides venezuelensis in comparison to free IVM. Collectively, the present findings demonstrate the promising potential of PCL-PSO nanocapsules to improve the antiparasitic effects exerted by IVM.
Collapse
Affiliation(s)
- Zilyane Cardoso de Souza
- Graduate Program in Applied Cellular and Molecular Biology, University of Pernambuco (UPE), 50100-130, Recife, PE, Brazil
| | | | - Irapuan Oliveira Pinheiro
- Graduate Program in Applied Cellular and Molecular Biology, University of Pernambuco (UPE), 50100-130, Recife, PE, Brazil
| | | | - Brenda Oliveira de Abreu
- Graduate Program in Health Sciences, University of Pernambuco (UPE), 50100-130 Recife, PE, Brazil
| | | | | | - Helenita Costa Quadros
- Gonçalo Moniz Institute (IGM), Oswaldo Cruz Foundation (FIOCRUZ), 40296-710 Salvador, BA, Brazil
| | | | - Paul Nguewa
- University of Navarra, ISTUN Institute of Tropical Health, Department of Microbiology and Parasitology, IdiSNA (Navarra Institute for Health Research), 31009, Pamplona, Spain
| | - Silmara Marques Alegretti
- Departament of Animal Biology, State University of Campinas (UNICAMP), 13083-862, Campinas, SP, Brazil
| | - Leonardo Paiva Farias
- Gonçalo Moniz Institute (IGM), Oswaldo Cruz Foundation (FIOCRUZ), 40296-710 Salvador, BA, Brazil
| | - Fabio Rocha Formiga
- Graduate Program in Applied Cellular and Molecular Biology, University of Pernambuco (UPE), 50100-130, Recife, PE, Brazil; Aggeu Magalhães Institute (IAM), Oswaldo Cruz Foundation (FIOCRUZ), 50670-420 Recife, PE, Brazil.
| |
Collapse
|
2
|
Maeda Y, Palomares-Rius JE, Hino A, Afrin T, Mondal SI, Nakatake A, Maruyama H, Kikuchi T. Secretome analysis of Strongyloides venezuelensis parasitic stages reveals that soluble and insoluble proteins are involved in its parasitism. Parasit Vectors 2019; 12:21. [PMID: 30626426 PMCID: PMC6327390 DOI: 10.1186/s13071-018-3266-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/12/2018] [Indexed: 11/22/2022] Open
Abstract
Background Parasites excrete and secrete a wide range of molecules that act as the primary interface with their hosts and play critical roles in establishing parasitism during different stages of infection. Strongyloides venezuelensis is a gastrointestinal parasite of rats that is widely used as a laboratory model and is known to produce both soluble and insoluble (adhesive) secretions during its parasitic stages. However, little is known about the constituents of these secretions. Results Using mass spectrometry, we identified 436 proteins from the infective third-stage larvae (iL3s) and 196 proteins from the parasitic females of S. venezuelensis. The proteins that were secreted by the iL3s were enriched with peptidase activity, embryo development and the oxidation-reduction process, while those of the parasitic females were associated with glycolysis, DNA binding (histones) and other unknown functions. Trypsin inhibitor-like domain-containing proteins were identified as the main component of the adhesive secretion from parasitic females. An absence of secretion signals in many of the proteins indicated that they are secreted via non-classical secretion pathways. Conclusions We found that S. venezuelensis secretes a wide range of proteins to establish parasitism. This includes proteins that have previously been identified as being involved in parasitism in other helminths as well as proteins that are unique to this species. These findings provide insights into the molecular mechanisms underlying Strongyloides parasitism. Electronic supplementary material The online version of this article (10.1186/s13071-018-3266-x) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Yasunobu Maeda
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan
| | - Juan Emilio Palomares-Rius
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan.,Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Científicas (CSIC), Avda. Menéndez Pidal s/n, 14004, Córdoba, Spain
| | - Akina Hino
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan.,Department of Environmental Parasitology, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Tanzila Afrin
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan
| | - Shakhinur Islam Mondal
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan
| | - Ayako Nakatake
- HTLV-1/ATL Research Facility, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan
| | - Haruhiko Maruyama
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan
| | - Taisei Kikuchi
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan.
| |
Collapse
|
3
|
Gonzaga HT, Nunes DDS, Ribeiro VDS, Feliciano ND, Cunha-Junior JPD, Costa-Cruz JM. Metaperiodate deglycosylation of Strongyloides venezuelensis larvae: Immunochemical characterization and antigen production for human strongyloidiasis diagnosis. Acta Trop 2018; 182:27-33. [PMID: 29454735 DOI: 10.1016/j.actatropica.2018.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 01/24/2018] [Accepted: 02/10/2018] [Indexed: 10/18/2022]
Abstract
Strongyloidiasis is an important helminthiasis affecting million people worldwide. The aim of this study was to use sodium metaperiodate (MP) treatment to immunochemically characterize Strongyloides venezuelensis filariform larvae and use MP-treated heterologous antigen to detect IgG and subclasses in serum. Samples from individuals with definitive diagnosis of strongyloidiasis (n = 50), other parasitic diseases (n = 60) and negative endemic (n = 50) were tested. TG-ROC and two-way ANOVA were applied. MP-treatment resulted on differential localization of carbohydrates at larval structure and no carbohydrate content in saline extract (SE). Electrophoretic profiles were similar before and after treatment. ELISA sensitivity and specificity were: 90%; 88.2% for SE and 92.0%; 94.6% for MP, respectively. When using MP treated antigen we observed reduction in IgG1 and IgG3 detection in strongyloidiasis group and decrease of cross reactions in control groups. Our data demonstrate the role of carbohydrate residues in cross reactions and on the recognition of anti-Strongyloides IgG and its subclasses.
Collapse
|
4
|
Abstract
Strongyloides spp. are common parasites of vertebrates and two species, S. ratti and S. venezuelensis, parasitize rats; there are no known species that naturally infect mice. Strongyloides ratti and S. venezuelensis overlap in their geographical range and in these regions co-infections appear to be common. These species have been widely used as tractable laboratory systems in rats as well as mice. The core biology of these two species is similar, but there are clear differences in aspects of their within-host biology as well as in their free-living generation. Phylogenetic evidence suggests that S. ratti and S. venezuelensis are the result of two independent evolutionary transitions to parasitism of rats, which therefore presents an ideal opportunity to begin to investigate the basis of host specificity in Strongyloides spp.
Collapse
|
5
|
Hunt VL, Tsai IJ, Coghlan A, Reid AJ, Holroyd N, Foth BJ, Tracey A, Cotton JA, Stanley EJ, Beasley H, Bennett HM, Brooks K, Harsha B, Kajitani R, Kulkarni A, Harbecke D, Nagayasu E, Nichol S, Ogura Y, Quail MA, Randle N, Xia D, Brattig NW, Soblik H, Ribeiro DM, Sanchez-Flores A, Hayashi T, Itoh T, Denver DR, Grant W, Stoltzfus JD, Lok JB, Murayama H, Wastling J, Streit A, Kikuchi T, Viney M, Berriman M. The genomic basis of parasitism in the Strongyloides clade of nematodes. Nat Genet 2016; 48:299-307. [PMID: 26829753 PMCID: PMC4948059 DOI: 10.1038/ng.3495] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 12/23/2015] [Indexed: 12/19/2022]
Abstract
Soil-transmitted nematodes, including the Strongyloides genus, cause one of the most prevalent neglected tropical diseases. Here we compare the genomes of four Strongyloides species, including the human pathogen Strongyloides stercoralis, and their close relatives that are facultatively parasitic (Parastrongyloides trichosuri) and free-living (Rhabditophanes sp. KR3021). A significant paralogous expansion of key gene families--families encoding astacin-like and SCP/TAPS proteins--is associated with the evolution of parasitism in this clade. Exploiting the unique Strongyloides life cycle, we compare the transcriptomes of the parasitic and free-living stages and find that these same gene families are upregulated in the parasitic stages, underscoring their role in nematode parasitism.
Collapse
Affiliation(s)
- Vicky L. Hunt
- School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK
| | - Isheng J. Tsai
- Biodiversity Research Center, Academia Sinica, Taipei 11529, Taiwan
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Avril Coghlan
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Adam J. Reid
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Nancy Holroyd
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Bernardo J. Foth
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Alan Tracey
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - James A. Cotton
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Eleanor J. Stanley
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Helen Beasley
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Hayley M. Bennett
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Karen Brooks
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Bhavana Harsha
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Rei Kajitani
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan
| | - Arpita Kulkarni
- Max Planck Institute for Developmental Biology, Tübingen, Germany
| | | | - Eiji Nagayasu
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Sarah Nichol
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Yoshitoshi Ogura
- Department of Bacteriology, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Michael A. Quail
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Nadine Randle
- Department of Infection Biology, Institute of Infection and Global Health and School of Veterinary Science, University of Liverpool, Liverpool, UK
| | - Dong Xia
- Department of Infection Biology, Institute of Infection and Global Health and School of Veterinary Science, University of Liverpool, Liverpool, UK
| | - Norbert W. Brattig
- Department of Molecular Medicine, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Hanns Soblik
- Department of Molecular Medicine, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Diogo M. Ribeiro
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| | - Alejandro Sanchez-Flores
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
- Unidad de Secuenciación Masiva y Bioinformática, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México, 62210
| | - Tetsuya Hayashi
- Department of Bacteriology, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takehiko Itoh
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan
| | - Dee R. Denver
- Department of Intergrative Biology, Oregon State University, Corvallis, Oregon, USA
| | - Warwick Grant
- Department of Animal, Plant and Soil Sciences, La Trobe University, Melbourne, Victoria, Australia
| | - Jonathan D. Stoltzfus
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, 3800 Spruce Street, Philadelphia 19104, PA, USA
| | - James B. Lok
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, 3800 Spruce Street, Philadelphia 19104, PA, USA
| | - Haruhiko Murayama
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Jonathan Wastling
- Department of Infection Biology, Institute of Infection and Global Health and School of Veterinary Science, University of Liverpool, Liverpool, UK
- Faculty of Natural Sciences, University of Keele, Keele, Staffordshire, ST5 5BG, UK
| | - Adrian Streit
- Max Planck Institute for Developmental Biology, Tübingen, Germany
| | - Taisei Kikuchi
- Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Mark Viney
- School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK
| | - Matthew Berriman
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, CB10 1SA, UK
| |
Collapse
|
6
|
Nagayasu E, Ishikawa SA, Taketani S, Chakraborty G, Yoshida A, Inagaki Y, Maruyama H. Identification of a bacteria-like ferrochelatase in Strongyloides venezuelensis, an animal parasitic nematode. PLoS One 2013; 8:e58458. [PMID: 23516484 PMCID: PMC3596385 DOI: 10.1371/journal.pone.0058458] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 02/05/2013] [Indexed: 11/18/2022] Open
Abstract
Heme is an essential molecule for vast majority of organisms serving as a prosthetic group for various hemoproteins. Although most organisms synthesize heme from 5-aminolevulinic acid through a conserved heme biosynthetic pathway composed of seven consecutive enzymatic reactions, nematodes are known to be natural heme auxotrophs. The completely sequenced Caenorhabditis elegans genome, for example, lacks all seven genes for heme biosynthesis. However, genome/transcriptome sequencing of Strongyloides venezuelensis, an important model nematode species for studying human strongyloidiasis, indicated the presence of a gene for ferrochelatase (FeCH), which catalyzes the terminal step of heme biosynthesis, whereas the other six heme biosynthesis genes are apparently missing. Phylogenetic analyses indicated that nematode FeCH genes, including that of S. venezuelensis (SvFeCH) have a fundamentally different evolutionally origin from the FeCH genes of non-nematode metazoa. Although all non-nematode metazoan FeCH genes appear to be inherited vertically from an ancestral opisthokont, nematode FeCH may have been acquired from an alpha-proteobacterium, horizontally. The identified SvFeCH sequence was found to function as FeCH as expected based on both in vitro chelatase assays using recombinant SvFeCH and in vivo complementation experiments using an FeCH-deficient strain of Escherichia coli. Messenger RNA expression levels during the S. venezuelensis lifecycle were examined by real-time RT-PCR. SvFeCH mRNA was expressed at all the stages examined with a marked reduction at the infective third-stage larvae. Our study demonstrates the presence of a bacteria-like FeCH gene in the S. venezuelensis genome. It appeared that S. venezuelensis and some other animal parasitic nematodes reacquired the once-lost FeCH gene. Although the underlying evolutionary pressures that necessitated this reacquisition remain to be investigated, it is interesting that the presence of FeCH genes in the absence of other heme biosynthesis genes has been reported only for animal pathogens, and this finding may be related to nutritional availability in animal hosts.
Collapse
Affiliation(s)
- Eiji Nagayasu
- Department of Infectious Diseases, Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Sohta A. Ishikawa
- Graduate School for Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Shigeru Taketani
- Department of Biotechnology, Kyoto Institute of Technology, Kyoto, Japan
| | - Gunimala Chakraborty
- Department of Infectious Diseases, Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Ayako Yoshida
- Department of Infectious Diseases, Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Yuji Inagaki
- Graduate School for Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Haruhiko Maruyama
- Department of Infectious Diseases, Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
- * E-mail:
| |
Collapse
|
7
|
Nagayasu E, Ogura Y, Itoh T, Yoshida A, Chakraborty G, Hayashi T, Maruyama H. Transcriptomic analysis of four developmental stages of Strongyloides venezuelensis. Parasitol Int 2012; 62:57-65. [PMID: 23022620 DOI: 10.1016/j.parint.2012.09.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 09/02/2012] [Accepted: 09/20/2012] [Indexed: 11/25/2022]
Abstract
Strongyloides venezuelensis is one of some 50 species of genus Strongyloides, obligate gastrointestinal parasites of vertebrates, responsible for strongyloidiasis in humans and other domestic/companion animals. Although S. venezuelensis has been widely used as a model species for studying human/animal strongyloidiasis, the sequence information for this species has been quite limited. To create a more comprehensive catalogue of expressed genes for identification of genes potentially involved in animal parasitism, we conducted a de novo sequencing analysis of the transcriptomes from four developmental stages of S. venezuelensis, using a Roche 454 GS FLX Titanium pyrosequencing platform. A total of 14,573 contigs were produced after de novo assemblies of over 2 million sequencing reads and formed a dataset "Vene454". BLAST homology search of Vene454 against proteome and transcriptome data from other animal-parasitic and non-animal-parasitic nematode species revealed several interesting genes, which may be potentially related to animal parasitism, including nicotinamide phosphoribosyltransferase and ferrochelatase. The Vene454 dataset analysis also enabled us to identify transcripts that are specifically enriched in each developmental stage. This work represents the first large-scale transcriptome analysis of S. venezuelensis and the first study to examine the transcriptome of the lung L3 developmental stage of any Strongyloides species. The results not only will serve as valuable resources for future functional genomics analyses to understand the molecular aspects of animal parasitism, but also will provide essential information for ongoing whole genome sequencing efforts in this species.
Collapse
Affiliation(s)
- Eiji Nagayasu
- Department of Infectious Diseases, Division of Parasitology, University of Miyazaki, 5200 Kihara Kiyotake, Miyazaki 889-1692, Japan
| | | | | | | | | | | | | |
Collapse
|
8
|
Younis AE, Geisinger F, Ajonina-Ekoti I, Soblik H, Steen H, Mitreva M, Erttmann KD, Perbandt M, Liebau E, Brattig NW. Stage-specific excretory-secretory small heat shock proteins from the parasitic nematode Strongyloides ratti--putative links to host's intestinal mucosal defense system. FEBS J 2011; 278:3319-36. [PMID: 21762402 DOI: 10.1111/j.1742-4658.2011.08248.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
In a search for molecules involved in the interaction between intestinal nematodes and mammalian mucosal host cells, we performed MS to identify excretory-secretory proteins from Strongyloides ratti. In the excretory-secretory proteins of the parasitic female stage, we detected, in addition to other peptides, peptides homologous with the Caenorhabditis elegans heat shock protein (HSP)-17, named Sra-HSP-17.1 (∼ 19 kDa) and Sra-HSP-17.2 (∼ 18 kDa), with 49% amino acid identity. The full-length cDNAs (483 bp and 474 bp, respectively) were identified, and the genomic organization was analyzed. To allow further characterization, the proteins were recombinantly expressed and purified. Profiling of transcription by quantitative real-time-PCR and of protein by ELISA in various developmental stages revealed parasitic female-specific expression. Sequence analyses of both the DNA and amino acid sequences showed that the two proteins share a conserved α-crystallin domain and variable N-terminals. The Sra-HSP-17s showed the highest homology with the deduced small HSP sequence of the human pathogen Strongyloides stercoralis. We observed strong immunogenicity of both proteins, leading to strong IgG responses following infection of rats. Flow cytometric analysis indicated the binding of Sra-HSP-17s to the monocyte-macrophage lineage but not to peripheral lymphocytes or neutrophils. A rat intestinal epithelial cell line showed dose-dependent binding to Sra-HSP-17.1, but not to Sra-HSP-17.2. Exposed monocytes released interleukin-10 but not tumor necrosis factor-α in response to Sra-HSP-17s, suggesting the possible involvement of secreted female proteins in host immune responses.
Collapse
|
9
|
Molecular and functional characterisation of the heat shock protein 10 of Strongyloides ratti. Mol Biochem Parasitol 2009; 168:149-57. [DOI: 10.1016/j.molbiopara.2009.07.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 07/14/2009] [Accepted: 07/14/2009] [Indexed: 11/20/2022]
|
10
|
Surrun SK. Of Worms and Men. ANNALS OF THE ACADEMY OF MEDICINE, SINGAPORE 2007. [DOI: 10.47102/annals-acadmedsg.v36n8p708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
|
11
|
Maruyama H, Nishimaki A, Takuma Y, Kurimoto M, Suzuki T, Sakatoku Y, Ishikawa M, Ohta N. Successive changes in tissue migration capacity of developing larvae of an intestinal nematode, Strongyloides venezuelensis. Parasitology 2005; 132:411-8. [PMID: 16280094 DOI: 10.1017/s0031182005009042] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Revised: 09/06/2005] [Accepted: 09/06/2005] [Indexed: 11/05/2022]
Abstract
Infective larvae of an intestinal nematode, Strongyloides venezuelensis, enter rodent hosts percutaneously, and migrate through connective tissues and lungs. Then they arrive at the small intestine, where they reach maturity. It is not known how S. venezuelensis larvae develop during tissue migration. Here we demonstrate that tissue invasion ability of S. venezuelensis larvae changes drastically during tissue migration, and that the changes are associated with stage-specific protein expression. Infective larvae, connective tissue larvae, lung larvae, and mucosal larvae were used to infect mice by various infection methods, including percutaneous, subcutaneous, oral, and intraduodenal inoculation. Among different migration stages, only infective larvae penetrated mouse skin. Larvae, once inside the host, quickly lost skin penetration ability, which was associated with the disappearance of an infective larva-specific metalloprotease. Migrating larvae had connective tissue migration ability until in the lungs, where larvae became able to settle down in the intestinal mucosa. Lung larvae and mucosal larvae were capable of producing and secreting adhesion molecules.
Collapse
Affiliation(s)
- H Maruyama
- Department of Molecular Parasitology, Nagoya City University Graduate School of Medical Sciences, Kawasumi, Mizuho-cho, Mizuho, Nagoya 467-8601, Japan.
| | | | | | | | | | | | | | | |
Collapse
|