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1.
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Lewis LA, Shafer WM, Dutta Ray T, Ram S, Rice PA. Phosphoethanolamine Residues on the Lipid A Moiety of Neisseria gonorrhoeae Lipooligosaccharide Modulate Binding of Complement Inhibitors and Resistance to Complement-Killing. Infect Immun. 2012 Oct 15.
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2.
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Huang H, Ostroff GR, Lee CK, Agarwal S, Ram S, Rice PA, Specht CA, Levitz SM. Relative Contributions of Dectin-1 and Complement to Immune Responses to Particulate ß-Glucans. J Immunol. 2012 May 30.
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3.
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Beernink PT, Shaughnessy J, Pajon R, Braga EM, Ram S, Granoff DM. The effect of human factor h on immunogenicity of meningococcal native outer membrane vesicle vaccines with over-expressed factor h binding protein. PLoS Pathog. 2012 May; 8(5):e1002688.
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4.
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Serruto D, Bottomley MJ, Ram S, Giuliani MM, Rappuoli R. The new multicomponent vaccine against meningococcal serogroup B, 4CMenB: Immunological, functional and structural characterization of the antigens. Vaccine. 2012 Apr 30; 30 Suppl 2:B87-97.
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5.
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Lewis LA, Carter M, Ram S. The relative roles of factor h binding protein, neisserial surface protein a, and lipooligosaccharide sialylation in regulation of the alternative pathway of complement on meningococci. J Immunol. 2012 May 15; 188(10):5063-72.
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6.
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Gulati S, Agarwal S, Vasudhev S, Rice PA, Ram S. Properdin Is Critical for Antibody-Dependent Bactericidal Activity against Neisseria gonorrhoeae That Recruit C4b-Binding Protein. J Immunol. 2012 Apr 1; 188(7):3416-3425.
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7.
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Vu DM, Shaughnessy J, Lewis LA, Ram S, Rice PA, Granoff DM. Enhanced Bacteremia in Human Factor H Transgenic Rats Infected by Neisseria meningitidis. Infect Immun. 2011 Nov 21.
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8.
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Agarwal S, Specht CA, Haibin H, Ostroff GR, Ram S, Rice PA, Levitz SM. Linkage specificity and role of properdin in activation of the alternative complement pathway by fungal glycans. MBio. 2011; 2(5).
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9.
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Shaughnessy J, Ram S, Bhattacharjee A, Pedrosa J, Tran C, Horvath G, Monks B, Visintin A, Jokiranta TS, Rice PA. Molecular Characterization of the Interaction between Sialylated Neisseria gonorrhoeae and Factor H. J Biol Chem. 2011 Jun 24; 286(25):22235-42.
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10.
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Dutta Ray T, Lewis LA, Gulati S, Rice PA, Ram S. Novel Blocking Human IgG Directed against the Pentapeptide Repeat Motifs of Neisseria meningitidis Lip/H.8 and Laz Lipoproteins. J Immunol. 2011 Apr 15; 186(8):4881-94.
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11.
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Wong SM, St Michael F, Cox A, Ram S, Akerley BJ. ArcA-Regulated Glycosyltransferase Lic2B Promotes Complement Evasion and Pathogenesis of Nontypeable Haemophilus influenzae. Infect Immun. 2011 May; 79(5):1971-83.
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12.
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Beernink PT, Shaughnessy J, Braga EM, Liu Q, Rice PA, Ram S, Granoff DM. A meningococcal factor h binding protein mutant that eliminates factor h binding enhances protective antibody responses to vaccination. J Immunol. 2011 Mar 15; 186(6):3606-14.
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13.
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Ram S, Lewis LA, Agarwal S. Meningococcal group w-135 and y capsular polysaccharides paradoxically enhance activation of the alternative pathway of complement. J Biol Chem. 2011 Mar 11; 286(10):8297-307.
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14.
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Ram S, Lewis LA, Rice PA. Infections of people with complement deficiencies and patients who have undergone splenectomy. Clin Microbiol Rev. 2010 Oct; 23(4):740-80.
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15.
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Agarwal S, Ram S, Ngampasutadol J, Gulati S, Zipfel PF, Rice PA. Factor H facilitates adherence of Neisseria gonorrhoeae to complement receptor 3 on eukaryotic cells. J Immunol. 2010 Oct 1; 185(7):4344-53.
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16.
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Lewis LA, Ngampasutadol J, Wallace R, Reid JE, Vogel U, Ram S. The meningococcal vaccine candidate neisserial surface protein A (NspA) binds to factor H and enhances meningococcal resistance to complement. PLoS Pathog. 2010; 6(7):e1001027.
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17.
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Agarwal S, Ferreira VP, Cortes C, Pangburn MK, Rice PA, Ram S. An evaluation of the role of properdin in alternative pathway activation on Neisseria meningitidis and Neisseria gonorrhoeae. J Immunol. 2010 Jul 1; 185(1):507-16.
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18.
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Beernink PT, Shaughnessy J, Ram S, Granoff DM. Impaired immunogenicity of a meningococcal factor H-binding protein vaccine engineered to eliminate factor h binding. Clin Vaccine Immunol. 2010 Jul; 17(7):1074-8.
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19.
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Serruto D, Spadafina T, Ciucchi L, Lewis LA, Ram S, Tontini M, Santini L, Biolchi A, Seib KL, Giuliani MM, Donnelly JJ, Berti F, Savino S, Scarselli M, Costantino P, Kroll JS, O'Dwyer C, Qiu J, Plaut AG, Moxon R, Rappuoli R, Pizza M, Aricò B. Neisseria meningitidis GNA2132, a heparin-binding protein that induces protective immunity in humans. Proc Natl Acad Sci U S A. 2010 Feb 23; 107(8):3770-5.
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20.
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Shaughnessy J, Lewis LA, Jarva H, Ram S. Functional comparison of the binding of factor H short consensus repeat 6 (SCR 6) to factor H binding protein from Neisseria meningitidis and the binding of factor H SCR 18 to 20 to Neisseria gonorrhoeae porin. Infect Immun. 2009 May; 77(5):2094-103.
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21.
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Sabharwal V, Ram S, Figueira M, Park IH, Pelton SI. Role of complement in host defense against pneumococcal otitis media. Infect Immun. 2009 Mar; 77(3):1121-7.
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22.
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Welsch JA, Ram S. Factor H and Neisserial pathogenesis. Vaccine. 2008 Dec 30; 26 Suppl 8:I40-5.
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23.
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Blom AM, Ram S. Contribution of interactions between complement inhibitor C4b-binding protein and pathogens to their ability to establish infection with particular emphasis on Neisseria gonorrhoeae. Vaccine. 2008 Dec 30; 26 Suppl 8:I49-55.
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24.
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Ngampasutadol J, Tran C, Gulati S, Blom AM, Jerse EA, Ram S, Rice PA. Species-specificity of Neisseria gonorrhoeae infection: do human complement regulators contribute? Vaccine. 2008 Dec 30; 26 Suppl 8:I62-6.
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25.
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Lewis LA, Choudhury B, Balthazar JT, Martin LE, Ram S, Rice PA, Stephens DS, Carlson R, Shafer WM. Phosphoethanolamine substitution of lipid A and resistance of Neisseria gonorrhoeae to cationic antimicrobial peptides and complement-mediated killing by normal human serum. Infect Immun. 2009 Mar; 77(3):1112-20.
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26.
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Granoff DM, Welsch JA, Ram S. Binding of complement factor H (fH) to Neisseria meningitidis is specific for human fH and inhibits complement activation by rat and rabbit sera. Infect Immun. 2009 Feb; 77(2):764-9.
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27.
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Garvin LE, Bash MC, Keys C, Warner DM, Ram S, Shafer WM, Jerse AE. Phenotypic and genotypic analyses of Neisseria gonorrhoeae isolates that express frequently recovered PorB PIA variable region types suggest that certain P1a porin sequences confer a selective advantage for urogenital tract infection. Infect Immun. 2008 Aug; 76(8):3700-9.
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28.
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Welsch JA, Ram S, Koeberling O, Granoff DM. Complement-dependent synergistic bactericidal activity of antibodies against factor H-binding protein, a sparsely distributed meningococcal vaccine antigen. J Infect Dis. 2008 Apr 1; 197(7):1053-61.
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29.
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Ngampasutadol J, Ram S, Gulati S, Agarwal S, Li C, Visintin A, Monks B, Madico G, Rice PA. Human factor H interacts selectively with Neisseria gonorrhoeae and results in species-specific complement evasion. J Immunol. 2008 Mar 1; 180(5):3426-35.
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30.
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Jain V, Halle A, Halmen KA, Lien E, Charrel-Dennis M, Ram S, Golenbock DT, Visintin A. Phagocytosis and intracellular killing of MD-2 opsonized gram-negative bacteria depend on TLR4 signaling. Blood. 2008 May 1; 111(9):4637-45.
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31.
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Lewis LA, Ram S, Prasad A, Gulati S, Getzlaff S, Blom AM, Vogel U, Rice PA. Defining targets for complement components C4b and C3b on the pathogenic neisseriae. Infect Immun. 2008 Jan; 76(1):339-50.
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32.
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Jarva H, Ngampasutadol J, Ram S, Rice PA, Villoutreix BO, Blom AM. Molecular characterization of the interaction between porins of Neisseria gonorrhoeae and C4b-binding protein. J Immunol. 2007 Jul 1; 179(1):540-7.
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33.
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Wong SM, Alugupalli KR, Ram S, Akerley BJ. The ArcA regulon and oxidative stress resistance in Haemophilus influenzae. Mol Microbiol. 2007 Jun; 64(5):1375-90.
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34.
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Ram S, Ngampasutadol J, Cox AD, Blom AM, Lewis LA, St Michael F, Stupak J, Gulati S, Rice PA. Heptose I glycan substitutions on Neisseria gonorrhoeae lipooligosaccharide influence C4b-binding protein binding and serum resistance. Infect Immun. 2007 Aug; 75(8):4071-81.
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35.
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Leroy M, Cabral H, Figueira M, Bouchet V, Huot H, Ram S, Pelton SI, Goldstein R. Multiple consecutive lavage samplings reveal greater burden of disease and provide direct access to the nontypeable Haemophilus influenzae biofilm in experimental otitis media. Infect Immun. 2007 Aug; 75(8):4158-72.
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36.
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Madico G, Ngampasutadol J, Gulati S, Vogel U, Rice PA, Ram S. Factor H binding and function in sialylated pathogenic neisseriae is influenced by gonococcal, but not meningococcal, porin. J Immunol. 2007 Apr 1; 178(7):4489-97.
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37.
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Schneider MC, Exley RM, Ram S, Sim RB, Tang CM. Interactions between Neisseria meningitidis and the complement system. Trends Microbiol. 2007 May; 15(5):233-40.
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38.
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Ho DK, Ram S, Nelson KL, Bonthuis PJ, Smith AL. lgtC expression modulates resistance to C4b deposition on an invasive nontypeable Haemophilus influenzae. J Immunol. 2007 Jan 15; 178(2):1002-12.
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39.
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Figueira MA, Ram S, Goldstein R, Hood DW, Moxon ER, Pelton SI. Role of complement in defense of the middle ear revealed by restoring the virulence of nontypeable Haemophilus influenzae siaB mutants. Infect Immun. 2007 Jan; 75(1):325-33.
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40.
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Madico G, Welsch JA, Lewis LA, McNaughton A, Perlman DH, Costello CE, Ngampasutadol J, Vogel U, Granoff DM, Ram S. The meningococcal vaccine candidate GNA1870 binds the complement regulatory protein factor H and enhances serum resistance. J Immunol. 2006 Jul 1; 177(1):501-10.
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41.
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Attia AS, Ram S, Rice PA, Hansen EJ. Binding of vitronectin by the Moraxella catarrhalis UspA2 protein interferes with late stages of the complement cascade. Infect Immun. 2006 Mar; 74(3):1597-611.
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42.
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Ngampasutadol J, Ram S, Blom AM, Jarva H, Jerse AE, Lien E, Goguen J, Gulati S, Rice PA. Human C4b-binding protein selectively interacts with Neisseria gonorrhoeae and results in species-specific infection. Proc Natl Acad Sci U S A. 2005 Nov 22; 102(47):17142-7.
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43.
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Gulati S, Cox A, Lewis LA, Michael FS, Li J, Boden R, Ram S, Rice PA. Enhanced factor H binding to sialylated Gonococci is restricted to the sialylated lacto-N-neotetraose lipooligosaccharide species: implications for serum resistance and evidence for a bifunctional lipooligosaccharide sialyltransferase in Gonococci. Infect Immun. 2005 Nov; 73(11):7390-7.
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44.
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Abdullah M, Nepluev I, Afonina G, Ram S, Rice P, Cade W, Elkins C. Killing of dsrA mutants of Haemophilus ducreyi by normal human serum occurs via the classical complement pathway and is initiated by immunoglobulin M binding. Infect Immun. 2005 Jun; 73(6):3431-9.
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45.
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Jarva H, Ram S, Vogel U, Blom AM, Meri S. Binding of the complement inhibitor C4bp to serogroup B Neisseria meningitidis. J Immunol. 2005 May 15; 174(10):6299-307.
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46.
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Ram S, Cox AD, Wright JC, Vogel U, Getzlaff S, Boden R, Li J, Plested JS, Meri S, Gulati S, Stein DC, Richards JC, Moxon ER, Rice PA. Neisserial lipooligosaccharide is a target for complement component C4b. Inner core phosphoethanolamine residues define C4b linkage specificity. J Biol Chem. 2003 Dec 19; 278(51):50853-62.
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47.
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Fisette PL, Ram S, Andersen JM, Guo W, Ingalls RR. The Lip lipoprotein from Neisseria gonorrhoeae stimulates cytokine release and NF-kappaB activation in epithelial cells in a Toll-like receptor 2-dependent manner. J Biol Chem. 2003 Nov 21; 278(47):46252-60.
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48.
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Massari P, Ram S, Macleod H, Wetzler LM. The role of porins in neisserial pathogenesis and immunity. Trends Microbiol. 2003 Feb; 11(2):87-93.
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49.
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Gulati S, Sastry K, Jensenius JC, Rice PA, Ram S. Regulation of the mannan-binding lectin pathway of complement on Neisseria gonorrhoeae by C1-inhibitor and alpha 2-macroglobulin. J Immunol. 2002 Apr 15; 168(8):4078-86.
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50.
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Teupe C, Takeuchi M, Ram SP, Pandian NG. Three-dimensional echocardiography: in-vitro validation of a new, voxel-based method for rapid quantification of ventricular volume in normal and aneurysmal left ventricles. Int J Cardiovasc Imaging. 2001 Apr; 17(2):99-105.
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