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Published in: BMC Infectious Diseases 1/2006

Open Access 01-12-2006 | Research article

Outcome of urogenital infection with Chlamydia muridarum in CD-14 gene knockout mice

Authors: Muhammad T Imtiaz, Justin H Schripsema, Ira M Sigar, Kyle H Ramsey

Published in: BMC Infectious Diseases | Issue 1/2006

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Abstract

Background

CD14 has been postulated to play a role in chlamydial immunity and immunopathology. There is evidence to support this role in human infections but its function in a mouse model has not been investigated.

Methods

Female CD14 gene knockout and C57BL/6J wild type mice were infected intravaginally with Chlamydia muridarum. The infection course was monitored by detection of viable chlamydiae from serially collected cervical-vaginal swabs. The sequela of tubal factor infertility was assessed using hydrosalpinx formation as a surrogate marker.

Results

A significantly abbreviated infection course was observed in the CD14 gene knockout mice but hydrosalpinx formation occurred at similar rates between the two groups.

Conclusion

Involvement of CD14 during chlamydial infection impedes infection resolution but this does not affect the sequela of infertility as assessed by hydrosalpinx formation.
Appendix
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Literature
1.
go back to reference Barron AL, White HJ, Rank RG, Soloff BL, Moses EB: A new animal model for the study of Chlamydia trachomatis genital infections: Infection of mice with the agent of mouse pneumonitis. J Infect Dis. 1981, 143(1): 63-66.CrossRef Barron AL, White HJ, Rank RG, Soloff BL, Moses EB: A new animal model for the study of Chlamydia trachomatis genital infections: Infection of mice with the agent of mouse pneumonitis. J Infect Dis. 1981, 143(1): 63-66.CrossRef
2.
go back to reference Rank RG: Models of Immunity. Chlamydia: Intracellular Biology, Pathogenesis, and Immunity. Edited by: Stephens RS. 1999, Washington, D.C., American Society for Microbiology, 239-295.CrossRef Rank RG: Models of Immunity. Chlamydia: Intracellular Biology, Pathogenesis, and Immunity. Edited by: Stephens RS. 1999, Washington, D.C., American Society for Microbiology, 239-295.CrossRef
3.
go back to reference Darville T, Andrews CW, Laffoon KK, Shymasani W, Kishen LR, Rank RG: Mouse strain-dependent variation in the course and outcome of chlamydial genital tract infection is associated with differences in host response. Infect Immun. 1997, 65(8): 3065-3073.PubMedCentral Darville T, Andrews CW, Laffoon KK, Shymasani W, Kishen LR, Rank RG: Mouse strain-dependent variation in the course and outcome of chlamydial genital tract infection is associated with differences in host response. Infect Immun. 1997, 65(8): 3065-3073.PubMedCentral
4.
go back to reference Darville T, O'Neill JM, Andrews CWJ, Nagarajan UM, Stahl L, Ojcius DM: Toll-like receptor-2, but not Toll-like receptor-4, is essential for development of oviduct pathology in chlamydial genital tract infection. J Immunol. 2003, 171: 6187-6197.CrossRefPubMed Darville T, O'Neill JM, Andrews CWJ, Nagarajan UM, Stahl L, Ojcius DM: Toll-like receptor-2, but not Toll-like receptor-4, is essential for development of oviduct pathology in chlamydial genital tract infection. J Immunol. 2003, 171: 6187-6197.CrossRefPubMed
5.
go back to reference Perfettini JL, Darville T, Dautry-Varsat A, Rank RG, Ojcius DM: Inhibition of Apoptosis by Gamma Interferon in Cells and Mice Infected with Chlamydia muridarum (the Mouse Pneumonitis Strain of Chlamydia trachomatis). Infect Immun. 2002, 70: 2559-2565. 10.1128/IAI.70.5.2559-2565.2002.CrossRefPubMedPubMedCentral Perfettini JL, Darville T, Dautry-Varsat A, Rank RG, Ojcius DM: Inhibition of Apoptosis by Gamma Interferon in Cells and Mice Infected with Chlamydia muridarum (the Mouse Pneumonitis Strain of Chlamydia trachomatis). Infect Immun. 2002, 70: 2559-2565. 10.1128/IAI.70.5.2559-2565.2002.CrossRefPubMedPubMedCentral
6.
go back to reference Ramsey KH, Miranpuri GS, Sigar IM, Ouellette S, Byrne GI: Chlamydia trachomatis persistence in the female mouse genital tract: inducible nitric oxide synthase and infection outcome. Infect Immun. 2001, 69: 5131-5137. 10.1128/IAI.69.8.5131-5137.2001.CrossRefPubMedPubMedCentral Ramsey KH, Miranpuri GS, Sigar IM, Ouellette S, Byrne GI: Chlamydia trachomatis persistence in the female mouse genital tract: inducible nitric oxide synthase and infection outcome. Infect Immun. 2001, 69: 5131-5137. 10.1128/IAI.69.8.5131-5137.2001.CrossRefPubMedPubMedCentral
7.
go back to reference Shah AA, Schripsema JH, Imtiaz MT, Sigar IM, Kasimos J, Matos PG, Inouye S, Ramsey KH: Histopathologic changes related to fibrotic oviduct occlusion after genital tract infection of mice with Chlamydia muridarum. Sex Transm Dis. 2005, 32: 49-56. 10.1097/01.olq.0000148299.14513.11.CrossRefPubMed Shah AA, Schripsema JH, Imtiaz MT, Sigar IM, Kasimos J, Matos PG, Inouye S, Ramsey KH: Histopathologic changes related to fibrotic oviduct occlusion after genital tract infection of mice with Chlamydia muridarum. Sex Transm Dis. 2005, 32: 49-56. 10.1097/01.olq.0000148299.14513.11.CrossRefPubMed
8.
go back to reference De La Maza LM, Pal S, Khamesipour A, Peterson EM: Intravaginal inoculation of mice with the Chlamydia trachomatis mouse pneumonitis biovar results in infertility. Infect Immun. 1994, 62(5): 2094-2097.PubMedCentral De La Maza LM, Pal S, Khamesipour A, Peterson EM: Intravaginal inoculation of mice with the Chlamydia trachomatis mouse pneumonitis biovar results in infertility. Infect Immun. 1994, 62(5): 2094-2097.PubMedCentral
9.
go back to reference Darville T, Andrews CWJ, Sikes JD, Fraley PL, Braswell L, Rank RG: Mouse strain-dependent chemokine regulation of the genital tract T helper cell type 1 immune response. Infect Immun. 2001, 69: 7419-7424. 10.1128/IAI.69.12.7419-7424.2001.CrossRefPubMedPubMedCentral Darville T, Andrews CWJ, Sikes JD, Fraley PL, Braswell L, Rank RG: Mouse strain-dependent chemokine regulation of the genital tract T helper cell type 1 immune response. Infect Immun. 2001, 69: 7419-7424. 10.1128/IAI.69.12.7419-7424.2001.CrossRefPubMedPubMedCentral
10.
go back to reference Brightbill HD, Libraty DH, Krutzik SR, Yang RB, Belisle JT, Bleharski JR, Maitland M, Norgard MV, Plevy SE, Smale ST, Brennan PJ, Bloom BR, Modlin RL: Host defense mechanisms triggered by microbial lipoproteins through toll-like receptors. Science. 1999, 285: 732-736. 10.1126/science.285.5428.732.CrossRefPubMed Brightbill HD, Libraty DH, Krutzik SR, Yang RB, Belisle JT, Bleharski JR, Maitland M, Norgard MV, Plevy SE, Smale ST, Brennan PJ, Bloom BR, Modlin RL: Host defense mechanisms triggered by microbial lipoproteins through toll-like receptors. Science. 1999, 285: 732-736. 10.1126/science.285.5428.732.CrossRefPubMed
11.
go back to reference Vasselon T, Detmers PA: Toll receptors: a central element in innate immune responses. Infect Immun. 2002, 70: 1033-1041. 10.1128/IAI.70.3.1033-1041.2002.CrossRefPubMedPubMedCentral Vasselon T, Detmers PA: Toll receptors: a central element in innate immune responses. Infect Immun. 2002, 70: 1033-1041. 10.1128/IAI.70.3.1033-1041.2002.CrossRefPubMedPubMedCentral
12.
go back to reference Triantafilou M, Triantafilou K: Lipopolysaccharide recognition: CD14, TLRs and the LPS-activation cluster. Trends Immunol. 2002, 23: 301-304. 10.1016/S1471-4906(02)02233-0.CrossRefPubMed Triantafilou M, Triantafilou K: Lipopolysaccharide recognition: CD14, TLRs and the LPS-activation cluster. Trends Immunol. 2002, 23: 301-304. 10.1016/S1471-4906(02)02233-0.CrossRefPubMed
13.
go back to reference Ingalls RR, Rice PA, Qureshi N, Takayama K, Lin JS, Golenbock DT: The inflammatory cytokine response to Chlamydia trachomatis infection is endotoxin mediated. Infect Immun. 1995, 63(8): 3125-3130. Ingalls RR, Rice PA, Qureshi N, Takayama K, Lin JS, Golenbock DT: The inflammatory cytokine response to Chlamydia trachomatis infection is endotoxin mediated. Infect Immun. 1995, 63(8): 3125-3130.
14.
go back to reference Kol A, Lichtman AH, Finberg RW, Libby P, Kurt-Jones EA: Cutting edge: heat shock protein (HSP) 60 activates the innate immune response: CD14 is an essential receptor for HSP60 activation of mononuclear cells. J Immunol. 2000, 164: 13-17.CrossRefPubMed Kol A, Lichtman AH, Finberg RW, Libby P, Kurt-Jones EA: Cutting edge: heat shock protein (HSP) 60 activates the innate immune response: CD14 is an essential receptor for HSP60 activation of mononuclear cells. J Immunol. 2000, 164: 13-17.CrossRefPubMed
15.
go back to reference Perfettini JL, Ojcius DM, Andrews CWJ, Korsmeyer SJ, Rank RG, Darville T: Role of proapoptotic BAX in propagation of Chlamydia muridarum (the mouse pneumonitis strain of Chlamydia trachomatis) and the host inflammatory response. J Biol Chem. 2003, 278: 9496-9502. 10.1074/jbc.M211275200.CrossRefPubMed Perfettini JL, Ojcius DM, Andrews CWJ, Korsmeyer SJ, Rank RG, Darville T: Role of proapoptotic BAX in propagation of Chlamydia muridarum (the mouse pneumonitis strain of Chlamydia trachomatis) and the host inflammatory response. J Biol Chem. 2003, 278: 9496-9502. 10.1074/jbc.M211275200.CrossRefPubMed
16.
go back to reference Devitt A, Moffatt OD, Raykundalia C, Capra JD, Simmons DL, Gregory CD: Human CD14 mediates recognition and phagocytosis of apoptotic cells. Nature. 1998, 392: 505-509. 10.1038/33169.CrossRefPubMed Devitt A, Moffatt OD, Raykundalia C, Capra JD, Simmons DL, Gregory CD: Human CD14 mediates recognition and phagocytosis of apoptotic cells. Nature. 1998, 392: 505-509. 10.1038/33169.CrossRefPubMed
17.
go back to reference Gregory CD: CD14-dependent clearance of apoptotic cells: relevance to the immune system. Curr Opin Immunol. 2000, 12: 27-34. 10.1016/S0952-7915(99)00047-3.CrossRefPubMed Gregory CD: CD14-dependent clearance of apoptotic cells: relevance to the immune system. Curr Opin Immunol. 2000, 12: 27-34. 10.1016/S0952-7915(99)00047-3.CrossRefPubMed
18.
go back to reference Ouburg S, Spaargaren J, den Hartog JE, Land JA, Fennema JS, Pleijster J, Pena AS, Morre SA: The CD14 functional gene polymorphism -260 C>T is not involved in either the susceptibility to Chlamydia trachomatis infection or the development of tubal pathology. BMC Infect Dis. 2005, 5: 114-10.1186/1471-2334-5-114.CrossRefPubMedPubMedCentral Ouburg S, Spaargaren J, den Hartog JE, Land JA, Fennema JS, Pleijster J, Pena AS, Morre SA: The CD14 functional gene polymorphism -260 C>T is not involved in either the susceptibility to Chlamydia trachomatis infection or the development of tubal pathology. BMC Infect Dis. 2005, 5: 114-10.1186/1471-2334-5-114.CrossRefPubMedPubMedCentral
19.
go back to reference Eng HL, Chen CH, Kuo CC, Wu JS, Wang CH, Lin TM: Association of CD14 promoter gene polymorphism and Chlamydia pneumoniae infection. J Infect Dis. 2003, 188: 90-97. 10.1086/375744.CrossRefPubMed Eng HL, Chen CH, Kuo CC, Wu JS, Wang CH, Lin TM: Association of CD14 promoter gene polymorphism and Chlamydia pneumoniae infection. J Infect Dis. 2003, 188: 90-97. 10.1086/375744.CrossRefPubMed
20.
go back to reference Netea MG, Kullberg BJ, Galama JM, Stalenhoef AF, Dinarello CA, van der Meer JW: Non-LPS components of Chlamydia pneumoniae stimulate cytokine production through Toll-like receptor 2-dependent pathways. Eur J Immunol. 2002, 32: 1188-1195. 10.1002/1521-4141(200204)32:4<1188::AID-IMMU1188>3.0.CO;2-A.CrossRefPubMed Netea MG, Kullberg BJ, Galama JM, Stalenhoef AF, Dinarello CA, van der Meer JW: Non-LPS components of Chlamydia pneumoniae stimulate cytokine production through Toll-like receptor 2-dependent pathways. Eur J Immunol. 2002, 32: 1188-1195. 10.1002/1521-4141(200204)32:4<1188::AID-IMMU1188>3.0.CO;2-A.CrossRefPubMed
21.
go back to reference Hung J, McQuillan BM, Chapman CM, Thompson PL, Beilby JP: Promoter polymorphism of the gene for CD14 receptor is not associated with sub-clinical carotid atherosclerosis in a community population. Eur J Cardiovasc Prev Rehabil. 2004, 11: 344-349. 10.1097/01.hjr.0000129741.07723.6c.CrossRefPubMed Hung J, McQuillan BM, Chapman CM, Thompson PL, Beilby JP: Promoter polymorphism of the gene for CD14 receptor is not associated with sub-clinical carotid atherosclerosis in a community population. Eur J Cardiovasc Prev Rehabil. 2004, 11: 344-349. 10.1097/01.hjr.0000129741.07723.6c.CrossRefPubMed
22.
go back to reference Koenig W, Khuseyinova N, Hoffmann MM, Marz W, Frohlich M, Hoffmeister A, Brenner H, Rothenbacher D: CD14 C(-260)-->T polymorphism, plasma levels of the soluble endotoxin receptor CD14, their association with chronic infections and risk of stable coronary artery disease. J Am Coll Cardiol. 2002, 40: 34-42. 10.1016/S0735-1097(02)01937-X.CrossRefPubMed Koenig W, Khuseyinova N, Hoffmann MM, Marz W, Frohlich M, Hoffmeister A, Brenner H, Rothenbacher D: CD14 C(-260)-->T polymorphism, plasma levels of the soluble endotoxin receptor CD14, their association with chronic infections and risk of stable coronary artery disease. J Am Coll Cardiol. 2002, 40: 34-42. 10.1016/S0735-1097(02)01937-X.CrossRefPubMed
23.
go back to reference Cotter TW, Ramsey KH, Miranpuri GS, Poulsen CE, Byrne GI: Dissemination of Chlamydia trachomatis chronic genital tract infection in gamma interferon gene knockout mice. Infect Immun. 1997, 65(6): 2145-2152. Cotter TW, Ramsey KH, Miranpuri GS, Poulsen CE, Byrne GI: Dissemination of Chlamydia trachomatis chronic genital tract infection in gamma interferon gene knockout mice. Infect Immun. 1997, 65(6): 2145-2152.
24.
go back to reference Haziot A, Ferrero E, Kontgen F, Hijiya N, Yamamoto S, Silver J, Stewart CL, Goyert SM: Resistance to endotoxin shock and reduced dissemination of gram-negative bacteria in CD14-deficient mice. Immunity. 1996, 4: 407-414. 10.1016/S1074-7613(00)80254-X.CrossRefPubMed Haziot A, Ferrero E, Kontgen F, Hijiya N, Yamamoto S, Silver J, Stewart CL, Goyert SM: Resistance to endotoxin shock and reduced dissemination of gram-negative bacteria in CD14-deficient mice. Immunity. 1996, 4: 407-414. 10.1016/S1074-7613(00)80254-X.CrossRefPubMed
25.
go back to reference Cotter TW, Meng Q, Shen Z, Zhang Y, Su H, Caldwell HD: Protective efficacy of major outer membrane protein specific immunoglobulin A (IgA) and IgG monoclonal antibodies in a murine model of Chlamydia trachomatis genital tract infection. Infect Immun. 1996, 63(12): 4704-4714. Cotter TW, Meng Q, Shen Z, Zhang Y, Su H, Caldwell HD: Protective efficacy of major outer membrane protein specific immunoglobulin A (IgA) and IgG monoclonal antibodies in a murine model of Chlamydia trachomatis genital tract infection. Infect Immun. 1996, 63(12): 4704-4714.
26.
go back to reference Cotter TW, Miranpuri GS, Ramsey KH, Poulsen CE, Byrne GI: Reactivation of chlamydial genital tract infection in mice. Infect Immun. 1997, 65(6): 2067-2073. Cotter TW, Miranpuri GS, Ramsey KH, Poulsen CE, Byrne GI: Reactivation of chlamydial genital tract infection in mice. Infect Immun. 1997, 65(6): 2067-2073.
27.
go back to reference Morrison RP, Belland RJ, Lyng K, Caldwell HD: Chlamydial disease pathogenesis: The 57 kD chlamydial hypersensitivity antigen is a stress response protein. J Exp Med. 1989, 170: 1271-1283. 10.1084/jem.170.4.1271.CrossRefPubMed Morrison RP, Belland RJ, Lyng K, Caldwell HD: Chlamydial disease pathogenesis: The 57 kD chlamydial hypersensitivity antigen is a stress response protein. J Exp Med. 1989, 170: 1271-1283. 10.1084/jem.170.4.1271.CrossRefPubMed
28.
go back to reference Bulut Y, Faure E, Thomas L, Karahashi H, Michelsen KS, Equils O, Morrison SG, Morrison RP, Arditi M: Chlamydial heat shock protein 60 activates macrophages and endothelial cells through Toll-like receptor 4 and MD2 in a MyD88-dependent pathway. J Immunol. 2002, 168: 1435-1440.CrossRefPubMed Bulut Y, Faure E, Thomas L, Karahashi H, Michelsen KS, Equils O, Morrison SG, Morrison RP, Arditi M: Chlamydial heat shock protein 60 activates macrophages and endothelial cells through Toll-like receptor 4 and MD2 in a MyD88-dependent pathway. J Immunol. 2002, 168: 1435-1440.CrossRefPubMed
29.
go back to reference Knapp S, Wieland CW, Florquin S, Pantophlet R, Dijkshoorn L, Tshimbalanga N, Akira S, van der PT: Differential roles of CD14 and toll-like receptors 4 and 2 in murine Acinetobacter pneumonia. Am J Respir Crit Care Med. 2006, 173: 122-129. 10.1164/rccm.200505-730OC.CrossRefPubMed Knapp S, Wieland CW, Florquin S, Pantophlet R, Dijkshoorn L, Tshimbalanga N, Akira S, van der PT: Differential roles of CD14 and toll-like receptors 4 and 2 in murine Acinetobacter pneumonia. Am J Respir Crit Care Med. 2006, 173: 122-129. 10.1164/rccm.200505-730OC.CrossRefPubMed
30.
go back to reference Braedel-Ruoff S, Faigle M, Hilf N, Neumeister B, Schild H: Legionella pneumophila mediated activation of dendritic cells involves CD14 and TLR2. J Endotoxin Res. 2005, 11: 89-96. 10.1179/096805105X35189.CrossRefPubMed Braedel-Ruoff S, Faigle M, Hilf N, Neumeister B, Schild H: Legionella pneumophila mediated activation of dendritic cells involves CD14 and TLR2. J Endotoxin Res. 2005, 11: 89-96. 10.1179/096805105X35189.CrossRefPubMed
31.
go back to reference Benhnia MR, Wroblewski D, Akhtar MN, Patel RA, Lavezzi W, Gangloff SC, Goyert SM, Caimano MJ, Radolf JD, Sellati TJ: Signaling through CD14 attenuates the inflammatory response to Borrelia burgdorferi, the agent of Lyme disease. J Immunol. 2005, 174: 1539-1548.CrossRefPubMed Benhnia MR, Wroblewski D, Akhtar MN, Patel RA, Lavezzi W, Gangloff SC, Goyert SM, Caimano MJ, Radolf JD, Sellati TJ: Signaling through CD14 attenuates the inflammatory response to Borrelia burgdorferi, the agent of Lyme disease. J Immunol. 2005, 174: 1539-1548.CrossRefPubMed
32.
go back to reference Bernheiden M, Heinrich JM, Minigo G, Schutt C, Stelter F, Freeman M, Golenbock D, Jack RS: LBP, CD14, TLR4 and the murine innate immune response to a peritoneal Salmonella infection. J Endotoxin Res. 2001, 7: 447-450. 10.1179/096805101101533061.CrossRefPubMed Bernheiden M, Heinrich JM, Minigo G, Schutt C, Stelter F, Freeman M, Golenbock D, Jack RS: LBP, CD14, TLR4 and the murine innate immune response to a peritoneal Salmonella infection. J Endotoxin Res. 2001, 7: 447-450. 10.1179/096805101101533061.CrossRefPubMed
33.
go back to reference Prebeck S, Kirschning C, Durr S, da Costa C, Donath B, Brand K, Redecke V, Wagner H, Miethke T: Predominant role of toll-like receptor 2 versus 4 in Chlamydia pneumoniae-induced activation of dendritic cells. J Immunol. 2001, 167: 3316-3323.CrossRefPubMed Prebeck S, Kirschning C, Durr S, da Costa C, Donath B, Brand K, Redecke V, Wagner H, Miethke T: Predominant role of toll-like receptor 2 versus 4 in Chlamydia pneumoniae-induced activation of dendritic cells. J Immunol. 2001, 167: 3316-3323.CrossRefPubMed
34.
go back to reference Underhill DM, Ozinsky A, Hajjar AM, Stevens A, Wilson CB, Bassetti M, Aderem A: The Toll-like receptor 2 is recruited to macrophage phagosomes and discriminates between pathogens [see comments]. Nature. 1999, 401: 811-815. 10.1038/44605.CrossRefPubMed Underhill DM, Ozinsky A, Hajjar AM, Stevens A, Wilson CB, Bassetti M, Aderem A: The Toll-like receptor 2 is recruited to macrophage phagosomes and discriminates between pathogens [see comments]. Nature. 1999, 401: 811-815. 10.1038/44605.CrossRefPubMed
35.
go back to reference Kincy-Cain T, Rank RG: Local TH1-like responses are induced by intravaginal infection of mice with the mouse pneumonitis biovar of Chlamydia trachomatis. Infect Immun. 1995, 63(5): 1784-1789. Kincy-Cain T, Rank RG: Local TH1-like responses are induced by intravaginal infection of mice with the mouse pneumonitis biovar of Chlamydia trachomatis. Infect Immun. 1995, 63(5): 1784-1789.
36.
go back to reference Welter-Stahl L, Ojcius DM, Viala J, Girardin S, Liu W, Delarbre C, Philpott D, Kelly KA, Darville T: Stimulation of the cytosolic receptor for peptidoglycan, Nod1, by infection with Chlamydia trachomatis or Chlamydia muridarum. Cell Microbiol. 2006, 8: 1047-1057. 10.1111/j.1462-5822.2006.00686.x.CrossRefPubMed Welter-Stahl L, Ojcius DM, Viala J, Girardin S, Liu W, Delarbre C, Philpott D, Kelly KA, Darville T: Stimulation of the cytosolic receptor for peptidoglycan, Nod1, by infection with Chlamydia trachomatis or Chlamydia muridarum. Cell Microbiol. 2006, 8: 1047-1057. 10.1111/j.1462-5822.2006.00686.x.CrossRefPubMed
Metadata
Title
Outcome of urogenital infection with Chlamydia muridarum in CD-14 gene knockout mice
Authors
Muhammad T Imtiaz
Justin H Schripsema
Ira M Sigar
Kyle H Ramsey
Publication date
01-12-2006
Publisher
BioMed Central
Published in
BMC Infectious Diseases / Issue 1/2006
Electronic ISSN: 1471-2334
DOI
https://doi.org/10.1186/1471-2334-6-144

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