Παρασκευή 10 Φεβρουαρίου 2023

Friends or foes: The mononuclear phagocyte system in ischemic stroke

alexandrossfakianakis shared this article with you from Inoreader
Friends or foes: The mononuclear phagocyte system in ischemic stroke

Pathophysiological effects of mononuclear phagocyte system MPS in ischemic stroke.


Abstract

Ischemic stroke (IS) is a major cause of disability and death in adults, and the immune response plays an indispensable role in its pathological process. After the onset of IS, an inflammatory storm, with the infiltration and mobilization of the mononuclear phagocyte system (MPS), is triggered in the brain. Microglia are rapidly activated in situ, followed by waves of circulating monocytes into the ischemic area. Activated microglia and monocytes/macrophages are mainly distributed in the peri-infarct area. These cells have similar morphology and functions, such as secreting cytokines and phagocytosis. Previously, the presence of the MPS was considered a marker of an exacerbated inflammatory response that contributes to brain damage. However, recent studies have suggested a rather complicated role of the MPS in IS. Here, we reviewed articles focusing on various functions of the MPS among different phases of IS, including recruitment, polarization, phagocytosis, angiogenesis, and in teraction with other types of cells. Moreover, due to the characteristics of the MPS, we also noted clinical research addressing alterations in the MPS as potential biomarkers for IS patients for the purposes of predicting prognosis and developing novel therapeutic strategies.

View on Web

The risk of acute myocardial infarction among patients with laboratory-confirmed invasive pneumococcal disease: a self-controlled case series study

alexandrossfakianakis shared this article with you from Inoreader

cid_ogimage.png

Abstract
Background
Major cardiovascular events, including acute myocardial infarction (AMI), have been reported among patients with certain viral and bacterial infections. Yet, whether invasive pneumococcal disease (IPD) increases the risk of AMI remains unclear. We examined whether laboratory-confirmed IPD was associated with the risk of AMI.
Methods
We conducted a self-controlled case series analysis among adult Tennessee residents with evidence of a first AM I hospitalization (2003-2019). Patient follow-up started 1 year prior to the earliest AMI and continued through the date of death, 1 year after AMI or end of study (12/2019). Periods for AMI assessment included the 7 to 1 days before IPD-specimen collection (pre IPD detection), day 0 through day 7 after IPD-specimen collection (current IPD), the 8 to 28 days after IPD-specimen collection (post IPD), and a control period (all other follow-up time). We used conditional Poisson regression to calculate incidence rate ratios and 95% confidence intervals (CI) for each risk period compared to control periods using within-person comparisons.
Results
We studied 324 patients hospitalized for AMI with a laboratory-confirmed IPD within 1 year before or after the AMI hospitalization. The incidence of AMI was significantly higher during the pre-IPD detection period (IRR:10.29; CI:6.33-16.73) and current IPD (IRR: 92.95; CI:72.17-119.71) periods, but non-significantly elevated in the post -IPD risk period (IRR: 1.83; CI:0.86-3.91) compared to control periods. An elevated AMI incidence was also observed in the post-IPD control period (29 to 364 days after IPD) [IRR: 2.95; CI:2.01-4.32].
Conclusions
Hospitalizations with AMI were strongly associated with laboratory-confirmed IPD.
View on Web

Prevalence of ocular candidiasis and Candida endophthalmitis in patients with candidemia: A systematic review and meta-analysis

alexandrossfakianakis shared this article with you from Inoreader

cid_ogimage.png

Abstract
Background
Infectious diseases and ophthalmology professional societies have disagreed regarding ocular screening in patients with candidemia. This study aimed to summarize the current evidence on the prevalence of ocular candidiasis (OC) and Candida endophthalmitis (CE) according to the standardized definitions.
Methods
A literature search was conducted from the 1990s through October 16th, 2022, using PubMed, Emb ase, and SCOPUS. Pooled prevalence of ocular complications was derived from generalized linear mixed models. (PROSPERO CRD42022326610)
Results
A total of 70 and 35 studies were included in the meta-analysis for OC and concordant CE (chorioretinitis with vitreous involvement), respectively. This study represented 8,599 patients with candidemia who underwent ophthalmologic examination. The pooled prevalence [95% confidence interval] of OC, overall CE, concordant CE, and discordant CE were 10.7% [8.4%-13.5%], 3.1% [2.1%-4.5%], 1.8% [1.3%-2.6%], and 7.4% [4.5%-12%] of patients screened, respectively. Studies from Asian countries had significantly higher concordant CE prevalence of patients screened [95% CI] of 3.6% [2.9% - 4.6%] compared to studies from European countries of 1.4% [0.4% - 5%] and American countries of 1.4% [0.9% - 2.2%], p-value <0.01. Presence of total parenteral nutrition and C. albicans were associated with CE with p ooled odds ratios [95% CI] of 6.92 [3.58–13.36] and 3.02 [1.67–5.46], respectively.
Conclusion
Prevalence of concordant CE overall and among Asian countries was two-times and four-times higher than the prevalence previously reported by American Academy of Ophthalmology of < 0.9%, respectively. There is an urgent need to study optimal screening protocols and to establish joint recommendations by the Infectious Diseases and Ophthalmology Societies.
View on Web

The Long Outer-Hair-Cell RC Time Constant: A Feature, Not a Bug, of the Mammalian Cochlea

alexandrossfakianakis shared this article with you from Inoreader
AbstractThe cochlea of the mammalian inner ear includes an active, hydromechanical amplifier thought to arise via the piezoelectric action of the outer hair cells (OHCs). A classic problem of cochlear biophysics is that theRC (resistance-capacitance) time constant of the hair-cell membrane appears inconveniently long, producing an effective cut-off frequency much lower than that of most audible sounds. The longRC time constant implies that the OHC receptor potential —and hence its electromotile response—decreases by roughly two orders of magnitude over the frequency range of mammalian hearing, casting doubt on the hypothesized role of cycle-by-cycle OHC-based amplification in mammalian hearing. Here, we review published data and basic physics to show that t he "RC problem " has bee...
View on Web

Therapeutic Cancer Vaccines for Recurrent and Metastatic Head and Neck Cancer

alexandrossfakianakis shared this article with you from Inoreader

orv220007t1_1675893392.86703.png?Expires

This review provides an overview of the clinical efficacy of various treatment modalities currently available for treatment of recurrent and metastatic head and neck squamous cell carcinoma.
View on Web

Decisional Conflict in Patients With Head and Neck Cancer

alexandrossfakianakis shared this article with you from Inoreader

ooi220089f1_1675893395.95067.png?Expires

This cohort study examines assess decisional conflict amo ng patients with head and neck squamous cell carcinoma, the association between decisional conflict and quality of life, and the degree of control patients experience in the decision-making process.
View on Web

Risk Factors for Hearing Loss at Birth in Newborns With Congenital Cytomegalovirus Infection

alexandrossfakianakis shared this article with you from Inoreader

ooi220084f1_1675893409.38135.png?Expires

This cross-sectional study assesses the risk factors for hearing loss at birth in newborns with congenital cytomegalovirus.
View on Web