Bacterial capsules: Occurrence, mechanism, and function

S Gao, W Jin, Y Quan, Y Li, Y Shen, S Yuan… - npj Biofilms and …, 2024 - nature.com
In environments characterized by extended multi-stress conditions, pathogens develop a
variety of immune escape mechanisms to enhance their ability to infect the host. The …

Capsule type defines the capability of Klebsiella pneumoniae in evading Kupffer cell capture in the liver

X Huang, X Li, H An, J Wang, M Ding, L Wang… - PLoS …, 2022 - journals.plos.org
Polysaccharide capsule is the main virulence factor of K. pneumoniae, a major pathogen of
bloodstream infections in humans. While more than 80 capsular serotypes have been …

The oxidative stress response of Streptococcus pneumoniae: its contribution to both extracellular and intracellular survival

M Hernandez-Morfa, NB Olivero, VE Zappia… - Frontiers in …, 2023 - frontiersin.org
Streptococcus pneumoniae is a gram-positive, aerotolerant bacterium that naturally
colonizes the human nasopharynx, but also causes invasive infections and is a major cause …

Functional vulnerability of liver macrophages to capsules defines virulence of blood-borne bacteria

H An, C Qian, Y Huang, J Li, X Tian, J Feng… - Journal of Experimental …, 2022 - rupress.org
Many encapsulated bacteria use capsules to cause invasive diseases. However, it remains
largely unknown how the capsules enhance bacterial virulence under in vivo infection …

Targeting NAD+ regeneration enhances antibiotic susceptibility of Streptococcus pneumoniae during invasive disease

H Im, ML Pearson, E Martinez, KH Cichos, X Song… - Plos …, 2023 - journals.plos.org
Anaerobic bacteria are responsible for half of all pulmonary infections. One such pathogen
is Streptococcus pneumoniae (Spn), a leading cause of community-acquired pneumonia …

A link between STK signalling and capsular polysaccharide synthesis in Streptococcus suis

J Tang, M Guo, M Chen, B Xu, T Ran, W Wang… - Nature …, 2023 - nature.com
Synthesis of capsular polysaccharide (CPS), an important virulence factor of pathogenic
bacteria, is modulated by the CpsBCD phosphoregulatory system in Streptococcus …

Detoxification of reactive oxygen species by the hyaluronic acid capsule of group A Streptococcus

S Wilde, A Dash, A Johnson, K Mackey… - Infection and …, 2023 - Am Soc Microbiol
The pro-inflammatory cytokine IL-6 regulates antimicrobial responses that are broadly
crucial in the defense against infection. Our prior work shows that IL-6 promotes the killing of …

An opportunistic pathogen under stress: how Group B Streptococcus responds to cytotoxic reactive species and conditions of metal ion imbalance to survive

KGK Goh, D Desai, R Thapa, D Prince… - FEMS Microbiology …, 2024 - academic.oup.com
Abstract Group B Streptococcus (GBS; also known as Streptococcus agalactiae) is an
opportunistic bacterial pathogen that causes sepsis, meningitis, pneumonia, and skin and …

Impaired upper respiratory tract barrier function during postnatal development predisposes to invasive pneumococcal disease

KL Lokken-Toyli, SD Aggarwal, GCW Bee… - PLoS …, 2024 - journals.plos.org
Infants are highly susceptible to invasive respiratory and gastrointestinal infections. To
elucidate the age-dependent mechanism (s) that drive bacterial spread from the mucosa, we …

[HTML][HTML] Streptococcus pneumoniae meningitis and the CNS barriers

E Gil, E Wall, M Noursadeghi, JS Brown - Frontiers in Cellular and …, 2023 - frontiersin.org
Streptococcus pneumoniae (SPN) is a globally significant cause of meningitis, the
pathophysiology of which involves damage to the brain by both bacterial virulence factors …