A Novel Sialic Acid Binding Site on Factor H Mediates Serum Resistance of Sialylated Neisseria gonorrhoeae
S Ram, AK Sharma, SD Simpson, S Gulati… - The Journal of …, 1998 - rupress.org
Factor H (fH), a key alternative complement pathway regulator, is a cofactor for factor I–mediated
cleavage of C3b. fH consists of 20 short consensus repeat (SCR) domains. Sialic acid …
cleavage of C3b. fH consists of 20 short consensus repeat (SCR) domains. Sialic acid …
The meningococcal vaccine candidate GNA1870 binds the complement regulatory protein factor H and enhances serum resistance
…, U Vogel, DM Granoff, S Ram - The Journal of …, 2006 - journals.aai.org
Neisseria meningitidis binds factor H (fH), a key regulator of the alternative complement
pathway. A∼ 29 kD fH-binding protein expressed in the meningococcal outer membrane was …
pathway. A∼ 29 kD fH-binding protein expressed in the meningococcal outer membrane was …
Meningococcal disease and the complement system
LA Lewis, S Ram - Virulence, 2014 - Taylor & Francis
Despite considerable advances in the understanding of the pathogenesis of meningococcal
disease, this infection remains a major cause of morbidity and mortality globally. The role of …
disease, this infection remains a major cause of morbidity and mortality globally. The role of …
Infections of people with complement deficiencies and patients who have undergone splenectomy
S Ram, LA Lewis, PA Rice - Clinical microbiology reviews, 2010 - Am Soc Microbiol
The complement system comprises several fluid-phase and membrane-associated proteins.
Under physiological conditions, activation of the fluid-phase components of complement is …
Under physiological conditions, activation of the fluid-phase components of complement is …
The new multicomponent vaccine against meningococcal serogroup B, 4CMenB: immunological, functional and structural characterization of the antigens
D Serruto, MJ Bottomley, S Ram, MM Giuliani… - Vaccine, 2012 - Elsevier
Neisseria meningitidis is a major cause of endemic cases and epidemics of meningitis and
devastating septicemia. Although effective vaccines exist for several serogroups of …
devastating septicemia. Although effective vaccines exist for several serogroups of …
The modern epidemic of syphilis
KG Ghanem, S Ram, PA Rice - New England Journal of Medicine, 2020 - Mass Medical Soc
Syphilis Over the past two decades, the incidence of syphilis has increased sharply. The
courses of both untreated and treated disease can be unpredictable. This review presents …
courses of both untreated and treated disease can be unpredictable. This review presents …
Binding of Complement Factor H to Loop 5 of Porin Protein 1A: A Molecular Mechanism of Serum Resistance of Nonsialylated Neisseria gonorrhoeae
S Ram, DP McQuillen, S Gulati, C Elkins… - The Journal of …, 1998 - rupress.org
Neisseria gonorrhoeae isolated from patients with disseminated infection are often of the
porin (Por1A) serotype and resist killing by nonimmune normal human serum. The molecular …
porin (Por1A) serotype and resist killing by nonimmune normal human serum. The molecular …
Binding of C4b-Binding Protein to Porin: A Molecular Mechanism of Serum Resistance of Neisseria gonorrhoeae
S Ram, M Cullinane, AM Blom, S Gulati… - The Journal of …, 2001 - rupress.org
We screened 29 strains of Neisseria gonorrhoeae and found 16/21 strains that resisted
killing by normal human serum and 0/8 serum sensitive strains that bound the complement …
killing by normal human serum and 0/8 serum sensitive strains that bound the complement …
Neisseria meningitidis GNA2132, a heparin-binding protein that induces protective immunity in humans
…, L Ciucchi, LA Lewis, S Ram… - Proceedings of the …, 2010 - National Acad Sciences
GNA2132 is a Neisseria meningitidis antigen of unknown function, discovered by reverse
vaccinology, which has been shown to induce bactericidal antibodies in animal models. Here …
vaccinology, which has been shown to induce bactericidal antibodies in animal models. Here …
The role of porins in neisserial pathogenesis and immunity
P Massari, S Ram, H Macleod, LM Wetzler - Trends in microbiology, 2003 - cell.com
Neisseria meningitidis and Neisseria gonorrhoeae are Gram-negative pathogenic bacteria
responsible for bacterial meningitis and septicemia, and the sexually transmitted disease …
responsible for bacterial meningitis and septicemia, and the sexually transmitted disease …