scholarly journals O11‐1: Siglec‐1‐negative alveolar macrophages are associated with COPD exacerbation and may represent pro‐inflammatory phenotypes

Respirology ◽  
2021 ◽  
Vol 26 (S3) ◽  
pp. 30-30
Author(s):  
V. V. Damiano ◽  
R. P. Daniele ◽  
H. T. Tucker ◽  
J. H. Dauber

An important example of intracellular particles is encountered in silicosis where alveolar macrophages ingest inspired silica particles. The quantitation of the silica uptake by these cells may be a potentially useful method for monitoring silica exposure. Accurate quantitative analysis of ingested silica by phagocytic cells is difficult because the particles are frequently small, irregularly shaped and cannot be visualized within the cells. Semiquantitative methods which make use of particles of known size, shape and composition as calibration standards may be the most direct and simplest approach to undertake. The present paper describes an empirical method in which glass microspheres were used as a model to show how the ratio of the silicon Kα peak X-ray intensity from the microspheres to that of a bulk sample of the same composition correlated to the mass of the microsphere contained within the cell. Irregular shaped silica particles were also analyzed and a calibration curve was generated from these data.


Pneumologie ◽  
2010 ◽  
Vol 64 (S 03) ◽  
Author(s):  
S Stenger ◽  
D Nickel ◽  
M Wagner ◽  
JH Ficker ◽  
C Schumann

Pneumologie ◽  
2011 ◽  
Vol 65 (12) ◽  
Author(s):  
NC Habel ◽  
S Hirn ◽  
F Tian ◽  
O Eickelberg ◽  
T Stoeger

2020 ◽  
Author(s):  
D Weidinger ◽  
D Alisch ◽  
K Jamal Jameel ◽  
M Ruhe ◽  
F Yusuf ◽  
...  

JMS SKIMS ◽  
2010 ◽  
Vol 13 (1) ◽  
pp. 15-19
Author(s):  
Bashir Ahmed Shah ◽  
Muzafar Ahmed Naik ◽  
Sajjad Rajab ◽  
Syed Muddasar ◽  
Ghulam Nabi Dhobi ◽  
...  

Objective: To study the significance of serum magnesium levels during COPD exacerbation and stability.Materials & Methods: The patient population consisted of all patients of COPD admitted as acute exacerbation as defined by the Anthonisens criteria, from June 2006 to may 2008. Same patients one month post discharge presenting to the OPD for routine check up as stable COPD served as controls. Results: A total number of 77 patients of COPD presenting as acute exacerbation were included in the study. The incidence of Hypomagnesaemia was 33.8% at admission; 5% at discharge and 4% at one month of post discharge in COPD patients. The mean serum magnesium levels were significantly lower in cases than controls (1.88±0.67mg/ dl V/S 2.3±0.36mg/dl; p<0.0001). Also, hypomagnesemia was present in higher number of cases (22/77, 33.8%) compared to controls, 3/75, 4.0%; (p<0.0001). Patients of COPD with acute exacerbation and hypomagnesemia, had longer duration of symptoms and had advanced stage III of COPD (p<0.001); and had raised mean corpuscle volume (p<0.045) and longer hospital stay (p<0.008).  Conclusion: We conclude COPD exacerbation is associated with hypomagnesemia. The duration of symptoms of more than 8 days, advanced stage of COPD (stage III) and raised MCV were associated with hypomagnesemia. We recommend to monitor serum magnesium levels in COPD patients with acute exacerbation at the time of admission and during their stay in the hospital.J Med Sci.2010;13(1);15-19


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