Otolaryngological Presentations of Klippel-Feil Syndrome: A Systematic Review.

Klippel-Feil syndrome (KFS) is a rare congenital condition characterized by the fusion of cervical vertebrae. It classically presents with a triad of symptoms: limited cervical range of motion, a low posterior hairline, and a short neck. Common otolaryngological manifestations include hearing loss, dysphagia, cleft palate, jaw disorders, thyroid abnormalities, and ear malformations, highlighting the importance of KFS awareness in the field of otolaryngology.

CD28 Shapes T Cell Receptor Signaling by Regulating ZAP70 Activation and Lck Dynamics.

T cell activation requires T cell receptor (TCR) engagement, which initiates a series of proximal events including tyrosine phosphorylation of the CD3 and TCRζ chains, recruitment, and activation of the protein tyrosine kinases Lck and ZAP70, followed by recruitment of adapter and signaling proteins. CD28 co-stimulation is also required to generate a functional immune response. Currently we lack a full understanding of the molecular mechanism of CD28 activation.

Microsporidian coinfection reduces fitness of a fungal pathogen due to rapid host mortality.

Infection outcomes can be strongly context dependent, shifting a host-symbiont relationship along a parasitism-mutualism continuum. Numerous studies show that under stressful conditions, symbionts that are typically mutualistic can become parasitic. The reverse possibility, a parasite becoming mutualistic, has received much less study.

Influenza vaccination stimulates maturation of the human T follicular helper cell response.

The differentiation and specificity of human CD4 T follicular helper cells (T cells) after influenza vaccination have been poorly defined. Here we profiled blood and draining lymph node (LN) samples from human volunteers for over 2 years after two influenza vaccines were administered 1 year apart to define the evolution of the CD4 T cell response. The first vaccination induced an increase in the frequency of circulating T (cT) and LN T cells at week 1 postvaccination.