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Hernandez-Caballero I, Hellgren O, Garcia-Longoria Batanete L. Genomic advances in the study of the mosquito vector during avian malaria infection. Parasitology 2023; 150:1330-1339. [PMID: 37614176 PMCID: PMC10941221 DOI: 10.1017/s0031182023000756] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 08/25/2023]
Abstract
Invertebrate host–parasite associations are one of the keystones in order to understand vector-borne diseases. The study of these specific interactions provides information not only about how the vector is affected by the parasite at the gene-expression level, but might also reveal mosquito strategies for blocking the transmission of the parasites. A very well-known vector for human malaria is Anopheles gambiae. This mosquito species has been the main focus for genomics studies determining essential key genes and pathways over the course of a malaria infection. However, to-date there is an important knowledge gap concerning other non-mammophilic mosquito species, for example some species from the Culex genera which may transmit avian malaria but also zoonotic pathogens such as West Nile virus. From an evolutionary perspective, these 2 mosquito genera diverged 170 million years ago, hence allowing studies in both species determining evolutionary conserved genes essential during malaria infections, which in turn might help to find key genes for blocking malaria cycle inside the mosquito. Here, we extensively review the current knowledge on key genes and pathways expressed in Anopheles over the course of malaria infections and highlight the importance of conducting genomic investigations for detecting pathways in Culex mosquitoes linked to infection of avian malaria. By pooling this information, we underline the need to increase genomic studies in mosquito–parasite associations, such as the one in Culex–Plasmodium, that can provide a better understanding of the infection dynamics in wildlife and reduce the negative impact on ecosystems.
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Affiliation(s)
- Irene Hernandez-Caballero
- Department of Anatomy, Cellular Biology and Zoology, University of Extremadura, E-06071 Badajoz, Spain
| | - Olof Hellgren
- Molecular Ecology and Evolution Lab, Department of Biology, Lund University, Sölvegatan 37, SE-22362, Sweden
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Xu XX, Zhang YQ, Freed S, Yu J, Gao YF, Wang S, Ouyang LN, Ju WY, Jin FL. An anionic defensin from Plutella xylostella with potential activity against Bacillus thuringiensis. BULLETIN OF ENTOMOLOGICAL RESEARCH 2016; 106:790-800. [PMID: 27443911 DOI: 10.1017/s0007485316000596] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Insect defensins, are cationic peptides that play an important role in immunity against microbial infection. In the present study, an anionic defensin from Plutella xylostella, (designated as PxDef) was first cloned and characterized. Amino acid sequence analysis showed that the mature peptide owned characteristic six-cysteine motifs with predicted isoelectric point of 5.57, indicating an anionic defensin. Quantitative real-time polymerase chain reaction analysis showed that PxDef was significantly induced in epidermis, fat body, midgut and hemocytes after injection of heat-inactivated Bacillus thuringiensis, while such an induction was delayed by the injection of live B. thuringiensis in the 4th instar larvae of P. xylostella. Knocking down the expression of nuclear transcription factor Dorsal in P. xylostella by RNA interference significantly decreased the mRNA level of PxDef, and increased the sensitivity of P. xylostella larvae to the infection by live B. thuringiensis. The purified recombinant mature peptide (PxDef) showed higher activity against Gram-positive bacteria, with the minimum inhibition concentrations of 1.6 and 2.6 µM against B. thuringiensis and Bacillus subtilis, respectively. To our knowledge, this is the first report about an anionic PxDef, which may play an important role in the immune system of P. xylostella against B. thuringiensis.
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Affiliation(s)
- X-X Xu
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province,College of Agriculture, South China Agricultural University,Guangzhou 510642,P. R. China
| | - Y-Q Zhang
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province,College of Agriculture, South China Agricultural University,Guangzhou 510642,P. R. China
| | - S Freed
- Department of Entomology,Faculty of Agricultural Sciences and Technology,Bahauddin Zakariya University,Multan 60800,Pakistan
| | - J Yu
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province,College of Agriculture, South China Agricultural University,Guangzhou 510642,P. R. China
| | - Y-F Gao
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province,College of Agriculture, South China Agricultural University,Guangzhou 510642,P. R. China
| | - S Wang
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province,College of Agriculture, South China Agricultural University,Guangzhou 510642,P. R. China
| | - L-N Ouyang
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province,College of Agriculture, South China Agricultural University,Guangzhou 510642,P. R. China
| | - W-Y Ju
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province,College of Agriculture, South China Agricultural University,Guangzhou 510642,P. R. China
| | - F-L Jin
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province,College of Agriculture, South China Agricultural University,Guangzhou 510642,P. R. China
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Souza ALA, Faria RX, Calabrese KS, Hardoim DJ, Taniwaki N, Alves LA, De Simone SG. Temporizin and Temporizin-1 Peptides as Novel Candidates for Eliminating Trypanosoma cruzi. PLoS One 2016; 11:e0157673. [PMID: 27384541 PMCID: PMC4934777 DOI: 10.1371/journal.pone.0157673] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 06/02/2016] [Indexed: 12/21/2022] Open
Abstract
Tropical diseases caused by parasitic infections continue to cause socioeconomic distress worldwide. Among these, Chagas disease has become a great concern because of globalization. Caused by Trypanosoma cruzi, there is an increasing need to discover new, more effective methods to manage infections that minimize disease onset. Antimicrobial peptides represent a possible solution to this challenge. As effector molecules of the innate immune response against pathogens, they are the first line of defense found in all multi-cellular organisms. In amphibians, temporins are a large family of antimicrobial peptides found in skin secretions. Their functional roles and modes of action present unique properties that indicate possible candidates for therapeutic applications. Here, we investigated the trypanocide activity of temporizin and temporizin-1. Temporizin is an artificial, hybrid peptide containing the N-terminal region of temporin A, the pore-forming region of gramicidin and a C-terminus consisting of alternating leucine and lysine. Temporizin-1 is a modification of temporizin with a reduction in the region responsible for insertion into membranes. Their activities were evaluated in a cell permeabilization assay by flow cytometry, an LDH release assay, electron microscopy, an MTT assay and patch clamp experiments. Both temporizin and temporizin-1 demonstrated toxicity against T. cruzi with temporizin displaying slightly more potency. At concentrations up to 100 μg/ ml, both peptides exhibited low toxicity in J774 cells, a macrophage lineage cell line, and no toxicity was observed in mouse primary peritoneal macrophages. In contrast, the peptides showed some toxicity in rat adenoma GH3 cells and Jurkat human lymphoma cells with temporizin-1 displaying lower toxicity. In summary, a shortened form of the hybrid temporizin peptide, temporizin-1, was efficient at killing T. cruzi and it has low toxicity in wild-type mammalian cells. These data suggest that temporizin-1 might be a candidate for Chagas disease therapy.
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Affiliation(s)
- André L. A. Souza
- FIOCRUZ, Center for Technological Development in Health (CDTS)/National Institute of Science and Technology for Innovation on Neglected Diseases (INCT-IDN), Rio de Janeiro, RJ, Brazil
- FIOCRUZ, Oswaldo Cruz Institute, Laboratory of Experimental and Computational Biochemistry of Pharmaceuticals, Rio de Janeiro, RJ, Brazil
| | - Robson X. Faria
- FIOCRUZ, Oswaldo Cruz Institute, Laboratory of Toxoplasmosis and other Protozoosis, Rio de Janeiro, RJ, Brazil
| | - Kátia S. Calabrese
- FIOCRUZ, Oswaldo Cruz Institute, Laboratory of Imunomodulation and Protozoology, Rio de Janeiro, RJ, Brazil
| | - Daiane J. Hardoim
- FIOCRUZ, Oswaldo Cruz Institute, Laboratory of Imunomodulation and Protozoology, Rio de Janeiro, RJ, Brazil
| | - Noemi Taniwaki
- FIOCRUZ, Adolfo Lutz Institute, Electronic Microscopy section, Araçatuba, São Paulo, SP, Brazil
| | - Luiz A. Alves
- FIOCRUZ, Oswaldo Cruz Institute, Laboratory of Cellular Communication, Rio de Janeiro, RJ, Brazil
| | - Salvatore G. De Simone
- FIOCRUZ, Center for Technological Development in Health (CDTS)/National Institute of Science and Technology for Innovation on Neglected Diseases (INCT-IDN), Rio de Janeiro, RJ, Brazil
- Federal Fluminense University, Biology Institute, Department of Cellular and Molecular Biology, Niterói, RJ, Brazil
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Sharma P, Sharma S, Mishra AK, Thomas T, Das De T, Rohilla SL, Singh N, Pandey KC, Valecha N, Dixit R. Unraveling dual feeding associated molecular complexity of salivary glands in the mosquito Anopheles culicifacies. Biol Open 2015; 4:1002-15. [PMID: 26163527 PMCID: PMC4542284 DOI: 10.1242/bio.012294] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Mosquito salivary glands are well known to facilitate meal acquisition, however the fundamental question on how adult female salivary gland manages molecular responses during sugar versus blood meal uptake remains unanswered. To investigate these responses, we analyzed a total of 58.5 million raw reads generated from two independent RNAseq libraries of the salivary glands collected from 3–4 day-old sugar and blood fed Anopheles culicifacies mosquitoes. Comprehensive functional annotation analysis of 10,931 contigs unraveled that salivary glands may encode diverse nature of proteins in response to distinct physiological feeding status. Digital gene expression analysis and PCR validation indicated that first blood meal significantly alters the molecular architecture of the salivary glands. Comparative microscopic analysis also revealed that first blood meal uptake not only causes an alteration of at least 12–22% of morphological features of the salivary glands but also results in cellular changes e.g. apoptosis, confirming together that adult female salivary glands are specialized organs to manage meal specific responses. Unraveling the underlying mechanism of mosquito salivary gene expression, controlling dual feeding associated responses may provide a new opportunity to control vector borne diseases.
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Affiliation(s)
- Punita Sharma
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, Sector-8, Dwarka, Delhi 110077, India Nano and Biotechnology Department, Guru Jambheshwar University, Hisar, Haryana 125001, India
| | - Swati Sharma
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, Sector-8, Dwarka, Delhi 110077, India
| | | | - Tina Thomas
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, Sector-8, Dwarka, Delhi 110077, India
| | - Tanwee Das De
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, Sector-8, Dwarka, Delhi 110077, India
| | - Suman Lata Rohilla
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, Sector-8, Dwarka, Delhi 110077, India
| | - Namita Singh
- Nano and Biotechnology Department, Guru Jambheshwar University, Hisar, Haryana 125001, India
| | - Kailash C Pandey
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, Sector-8, Dwarka, Delhi 110077, India
| | - Neena Valecha
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, Sector-8, Dwarka, Delhi 110077, India
| | - Rajnikant Dixit
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, Sector-8, Dwarka, Delhi 110077, India
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Gokhale K, Patil DP, Dhotre DP, Dixit R, Mendki MJ, Patole MS, Shouche YS. Transcriptome analysis of Anopheles stephensi embryo using expressed sequence tags. J Biosci 2013; 38:301-9. [PMID: 23660664 DOI: 10.1007/s12038-013-9320-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Germ band retraction (GBR) stage is one of the important stages during insect development. It is associated with an extensive epithelial morphogenesis and may also be pivotal in generation of morphological diversity in insects. Despite its importance, only a handful of studies report the transcriptome repertoire of this stage in insects. Here, we report generation, annotation and analysis of ESTs from the embryonic stage (16-22 h post fertilization) of laboratoryreared Anopheles stephensi mosquitoes. A total of 1002 contigs were obtained upon clustering of 1140 high-quality ESTs, which demonstrates an astonishingly low transcript redundancy (12.1 percent). Putative functions were assigned only to 213 contigs (21 percent), comprising mainly of transcripts encoding protein synthesis machinery. Approximately 78 percent of the transcripts remain uncharacterized, illustrating a lack of sequence information about the genes expressed in the embryonic stages of mosquitoes. This study highlights several novel transcripts, which apart from insect development, may significantly contribute to the essential biological complexity underlying insect viability in adverse environments. Nonetheless, the generated sequence information from this work provides a comprehensive resource for genome annotation, microarray development, phylogenetic analysis and other molecular biology applications in entomology.
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Affiliation(s)
- Kaustubh Gokhale
- National Centre for Cell Science, Ganeshkhind, Pune 411 007, India
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Geiser DL, Zhou G, Mayo JJ, Winzerling JJ. The effect of bacterial challenge on ferritin regulation in the yellow fever mosquito, Aedes aegypti. INSECT SCIENCE 2013; 20:601-19. [PMID: 23956079 PMCID: PMC4554699 DOI: 10.1111/j.1744-7917.2012.01581.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/03/2012] [Indexed: 05/02/2023]
Abstract
Secreted ferritin is the major iron storage and transport protein in insects. Here, we characterize the message and protein expression profiles of yellow fever mosquito (Aedes aegypti) ferritin heavy chain homologue (HCH) and light chain homologue (LCH) subunits in response to iron and bacterial challenge. In vivo experiments demonstrated tissue-specific regulation of HCH and LCH expression over time post-blood meal (PBM). Transcriptional regulation of HCH and LCH was treatment specific, with differences in regulation for naïve versus mosquitoes challenged with heat-killed bacteria (HKB). Translational regulation by iron regulatory protein (IRP) binding activity for the iron-responsive element (IRE) was tissue-specific and time-dependent PBM. However, mosquitoes challenged with HKB showed little change in IRP/IRE binding activity compared to naïve animals. The changes in ferritin regulation and expression in vivo were confirmed with in vitro studies. We challenged mosquitoes with HKB followed by a blood meal to determine the effects on ferritin expression, and demonstrate a synergistic, time-dependent regulation of expression for HCH and LCH.
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Affiliation(s)
- Dawn L Geiser
- Department of Nutritional Sciences, College of Agriculture and Life Sciences, the University of Arizona, Tucson, Arizona, 85721, USA
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Vijay S, Rawat M, Adak T, Dixit R, Nanda N, Srivastava H, Sharma JK, Prasad GBKS, Sharma A. Parasite killing in malaria non-vector mosquito Anopheles culicifacies species B: implication of nitric oxide synthase upregulation. PLoS One 2011; 6:e18400. [PMID: 21483693 PMCID: PMC3070730 DOI: 10.1371/journal.pone.0018400] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Accepted: 03/07/2011] [Indexed: 02/05/2023] Open
Abstract
Background Anopheles culicifacies, the main vector of human malaria in
rural India, is a complex of five sibling species. Despite being
phylogenetically related, a naturally selected subgroup species B of this
sibling species complex is found to be a poor vector of malaria. We have
attempted to understand the differences between vector and non-vector
Anopheles culicifacies mosquitoes in terms of
transcriptionally activated nitric oxide synthase (AcNOS)
physiologies to elucidate the mechanism of refractoriness. Identification of
the differences between genes and gene products that may impart refractory
phenotype can facilitate development of novel malaria transmission blocking
strategies. Methodology/Principal Findings We conducted a study on phylogenetically related susceptible (species A) and
refractory (species B) sibling species of An. culicifacies
mosquitoes to characterize biochemical and molecular differences in
AcNOS gene and gene elements and their ability to
inhibit oocyst growth. We demonstrate that in species B, AcNOS specific
activity and nitrite/nitrates in mid-guts and haemolymph were higher as
compared to species A after invasion of the mid-gut by P.
vivax at the beginning and during the course of blood feeding.
Semiquantitative RT-PCR and real time PCR data of AcNOS
concluded that this gene is more abundantly expressed in midgut of species B
than in species A and is transcriptionally upregulated post blood meals.
Dietary feeding of L-NAME along with blood meals significantly inhibited
midgut AcNOS activity leading to an increase in oocyst production in
An. culicifacies species B. Conclusions/Significance We hypothesize that upregulation of mosquito innate cytotoxicity due to NOS
in refractory strain to Plasmodium vivax infection may
contribute to natural refractoriness in An. culicifacies
mosquito population. This innate capacity of refractory mosquitoes could
represent the ancestral function of the mosquito immune system against the
parasite and could be utilized to understand the molecular basis of
refractoriness in planning effective vector control strategies.
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Affiliation(s)
- Sonam Vijay
- Protein Biochemistry and Structural Biology
Laboratory, National Institute of Malaria Research (ICMR), Dwarka, New Delhi,
India
| | - Manmeet Rawat
- Protein Biochemistry and Structural Biology
Laboratory, National Institute of Malaria Research (ICMR), Dwarka, New Delhi,
India
| | - Tridibes Adak
- Vector Biology Laboratory, National Institute
of Malaria Research (ICMR), Dwarka, New Delhi, India
| | - Rajnikant Dixit
- Host Parasite Interaction Group, National
Institute of Malaria Research (ICMR), Dwarka, New Delhi, India
| | - Nutan Nanda
- Molecular Entomology Laboratory, National
Institute of Malaria Research (ICMR), Dwarka, New Delhi, India
| | - Harish Srivastava
- Entomology Laboratory, National Institute of
Malaria Research (ICMR) Field Unit, Civil Hospital, Nadiad, Gujarat,
India
| | - Joginder K. Sharma
- Molecular Diagnostics Laboratory, Institute of
Cytology and Preventive Oncology (ICMR), Noida, India
| | | | - Arun Sharma
- Protein Biochemistry and Structural Biology
Laboratory, National Institute of Malaria Research (ICMR), Dwarka, New Delhi,
India
- * E-mail:
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Waniek PJ, Castro HC, Sathler PC, Miceli L, Jansen AM, Araújo CAC. Two novel defensin-encoding genes of the Chagas disease vector Triatoma brasiliensis (Reduviidae, Triatominae): gene expression and peptide-structure modeling. JOURNAL OF INSECT PHYSIOLOGY 2009; 55:840-8. [PMID: 19505471 DOI: 10.1016/j.jinsphys.2009.05.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 05/25/2009] [Accepted: 05/26/2009] [Indexed: 05/24/2023]
Abstract
Defensins are cysteine-rich peptides involved in the innate immunity of insects and many other organisms. In the present study, two novel defensin-encoding cDNAs and the respective genomic DNAs (def3 and def4) of Triatoma brasiliensis were identified and their tissue-specific and temporal expression was characterized. Both of the deduced mature peptides consisted of 43 amino acid residues and were highly similar to previously identified triatomine defensins (81.4-100%). Semi-quantitative RT-PCR data showed that def3 was constitutively expressed in the fat body and was induced in salivary glands and the small intestine at 5 and 3 days after feeding (daf), respectively. The def4 mRNA level was highly up-regulated in the stomach and fat-body tissues at 5 and 3 daf, respectively. The three-dimensional structures of these defensins were predicted using a homology modeling approach with Def-AAA, the defensin from Anopheles gambiae, as template (62-74% identity). A map of the electrostatic potential of these models revealed that, despite their similar folding patterns, mature Def2 and Def4 have a more cationic structure than is the case for Def1 and Def3. Such differences may orient the antimicrobial profile of these defensins against distinct targets in different organs of the insect.
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Affiliation(s)
- Peter J Waniek
- Laboratório de Biologia de Tripanosomatídeos, Instituto Oswaldo Cruz-IOC/FIOCRUZ, Av. Brasil 4365, Zip Code: 21045-900, Rio de Janeiro, Brazil.
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Dixit R, Sharma A, Mourya DT, Kamaraju R, Patole MS, Shouche YS. Salivary gland transcriptome analysis during Plasmodium infection in malaria vector Anopheles stephensi. Int J Infect Dis 2009; 13:636-46. [PMID: 19128996 DOI: 10.1016/j.ijid.2008.07.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2008] [Revised: 06/19/2008] [Accepted: 07/12/2008] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Understanding the tissue-specific molecular cross-talk mechanism during the mosquito-parasite interaction is of prime importance in the design of new strategies for malaria control. Because mosquito salivary glands are the final destination for the parasite maturation and transmission of vector-borne diseases, identification and characterization of salivary genes and their products are equally important in order to access their effect on the infectivity of the parasite. During the last five years there have been several studies on the sialomes of Anopheles mosquitoes, however very limited information is available on the changes in the salivary gland transcriptome in the presence of Plasmodium, and this information is limited to the mosquito Anopheles gambiae. METHODS In this study we aimed to explore and identify parasite-induced transcripts from the salivary glands of Anopheles stephensi, using a subtractive hybridization protocol. RESULTS Ninety-four percent of expressed sequence tags (ESTs) showed close homology to previously known families of mosquito salivary gland secretary proteins, representing the induced expression of alternative splicing and/or additional new members of the protein family. The remaining 6% of ESTs did not yield significant homology to any known proteins in the non-redundant database and thus may represent a class of unknown/novel salivary proteins. Primary analysis of the ESTs also revealed identification of several novel immune-related transcripts, including defensin and cecropins, probably involved in counter-activation of the antagonistic defense system. A comprehensive description of each family of proteins has been discussed in relation to the tissue-specific mosquito-parasite interaction. CONCLUSION This is the first report on the identification of new putative salivary genes, presumably activated during parasite infection.
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Affiliation(s)
- Rajnikant Dixit
- Molecular Biology Unit, National Center for Cell Science, Ganeshkhind, Pune, India.
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Molecular and phylogenetic analysis of a novel family of fibrinogen-related proteins from mosquito Aedes albopictus cell line. Comput Biol Chem 2008; 32:382-6. [PMID: 18706867 DOI: 10.1016/j.compbiolchem.2008.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2008] [Accepted: 07/01/2008] [Indexed: 02/08/2023]
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