scholarly journals High-Density Lipoprotein Binds toMycobacterium aviumand Affects the Infection of THP-1 Macrophages

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Naoya Ichimura ◽  
Megumi Sato ◽  
Akira Yoshimoto ◽  
Kouji Yano ◽  
Ryunosuke Ohkawa ◽  
...  
Keyword(s):  
Innate Immunity ◽  
High Density Lipoprotein ◽  
Physiological Activity ◽  
Density Lipoprotein ◽  
High Density ◽  
Host Cells ◽  
Bacterial Killing ◽  
Main Protein ◽  
The Relationship ◽  
Specific Lipid

High-density lipoprotein (HDL) is involved in innate immunity toward various infectious diseases. Concerning bacteria, HDL is known to bind to lipopolysaccharide (LPS) and to neutralize its physiological activity. On the other hand, cholesterol is known to play an important role in mycobacterial entry into host cells and in survival in the intracellular environment. However, the pathogenicity ofMycobacterium avium(M. avium) infection, which tends to increase worldwide, remains poorly studied. Here we report that HDL indicated a stronger interaction withM. aviumthan that with other Gram-negative bacteria containing abundant LPS. A binding of apolipoprotein (apo) A-I, the main protein component of HDL, with a specific lipid ofM. aviummight participate in this interaction. HDL did not have a direct bactericidal activity towardM. aviumbut attenuated the engulfment ofM. aviumby THP-1 macrophages. HDL also did not affect bacterial killing after ingestion of liveM. aviumby THP-1 macrophage. Furthermore, HDL strongly promoted the formation of lipid droplets inM. avium-infected THP-1 macrophages. These observations provide new insights into the relationship betweenM. aviuminfection and host lipoproteins, especially HDL. Thus, HDL may helpM. aviumto escape from host innate immunity.

scholarly journals High serum non-high-density lipoprotein and the risk of ischemic stroke: A systematic review

2021 ◽  
Vol 20 (1) ◽  
pp. 15-20
Author(s):  
Nyoman Tyas Apsari ◽  
◽  
Kumara Tini ◽  
I Putu Eka Widyadharma ◽  
◽  
...  
Keyword(s):  
Systematic Review ◽  
Ischemic Stroke ◽  
High Density Lipoprotein ◽  
Large Population ◽  
Density Lipoprotein ◽  
High Serum ◽  
High Density ◽  
Inclusion Criteria ◽  
Increased Risk ◽  
The Relationship

Objectives. High levels of non high density lipoprotein cholesterol (non-HDL-C) are known to contribute to an increased risk of ischemic stroke. This systematic review was conducted to identify the relationship between high non-HDL-C levels and the risk of ischemic stroke. Material and methods. This systematic review using PRISMA (preferred reporting items for systematic reviews and meta-analyses) statement guideline, with a pre-determined search strategy. The search was conducted in Pubmed Central (PMC) and Pubmed from 2009 until 2020 with inclusion criteria, patients with a diagnosis of ischemic stroke, age >18 years, with non-HDL-C levels. The title and abstract of these articles were reviewed for relevance, based on inclusion criteria. This systematic review using STROBE to evaluate the quality in individual study which consists of 22 domains. Results. In the final stage, this systematic review identifies six cohort study consisting 166.720 participants. Overall, the quality in individual studies based on STROBE is good. We reported that there are two studies report that high non-HDL-C levels can significantly increase the risk of ischemic stroke. Meanwhile, there are four studies that report there was no significant relationship between high non-HDL-C levels and the risk of ischemic stroke. Conclusions. Overall, this systematic review provides the result about relationship between high levels of nonHDL-C and the risk of ischemic stroke, there are two studies with a larger population support that high levels of non-HDL-C can increase the risk of ischemic stroke. However, further studies is needed with a large population that specifically identify the relationship between non-HDL-C levels and risk of ischemic stroke and makes a better adjustments for confounding variables.

THE RELATIONSHIP BETWEEN INFLAMMATION MARKERS AND MAGNESIUM/PHOSPHATE RATIO WITH ENDOTEL FUNCTION IN PERIPHERAL ARTERY DISEASE

2021 ◽  
Vol 6 (15) ◽  
pp. 80-86
Author(s):  
Serhat Çalışkan ◽  
Mehmet ATAY ◽  
Ferit BÖYÜK
Keyword(s):  
High Density Lipoprotein ◽  
Peripheral Artery Disease ◽  
Density Lipoprotein ◽  
High Density ◽  
Magnesium Phosphate ◽  
Peripheral Artery ◽  
The Mean ◽  
Endothelial Functions ◽  
Artery Disease ◽  
The Relationship

Objective: In our study, it was aimed to evaluate the relationship between neutrophil/lymphocyte, monocyte/high-density lipoprotein and magnesium/phosphate ratios with endothelial functions in patients with peripheral artery disease. Methods: Sixty patients followed up with peripheral arterial disease were included in this study. Endothelial functions of the patients were evaluated by flow-mediated vasodilation test. Pearson correlation analysis was used to evaluate the relationship between magnesium/phosphate, neutrophil/lymphocyte, monocyte/high-density lipoprotein ratios with percent change in flow-mediated vasodilation. Results: 48.3% of the participants are male and 51.7% are female. The mean age of the patients were 66.85±11.08 years. The mean radial artery basal diameter was 0.24±0.02 cm in the flow-mediated vasodilatation test and after the test the mean radial artery diameter was 0.27±0.02 cm(p<0.001). In the flow-mediated dilatation test predicting endothelial functions, the percentage change in arterial diameter was positively correlated with the Magnesium/phosphate ratio (r=-0.326, p=0.011), and negatively correlated with the Neutrophil/lymphocyte ratio and monocyte/high-density lipoprotein ratio (respectively r= -0.411, p=0.001; r=-0.530, p=0.001). Conclusion: Magnesium/phosphate ratio, neutrophil/lymphocyte ratio and monocyte/high-density lipoprotein ratio can be used to predict endothelial dysfunction in patients with peripheral artery disease.

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