Annals of Thoracic Medicine
ORIGINAL ARTICLE
Year
: 2015  |  Volume : 10  |  Issue : 4  |  Page : 279--283

Rapid detection of circulating fibrocytes by flowcytometry in idiopathic pulmonary fibrosis


Esam H Alhamad1, Zahid Shakoor2, Feisal A Al-Kassimi1, Adel Almogren2, Mohamed O Gad ElRab2, Shyam Maharaj3, Martin Kolb3 
1 Department of Medicine, King Khalid University Hospital, College of Medicine, King Saud University, Riyadh, Canada
2 Department of Pathology, King Khalid University Hospital, College of Medicine, King Saud University, Riyadh, Canada
3 Firestone Institute for Respiratory Health, Department of Medicine, McMaster University, Hamilton, Ontario, Canada

Correspondence Address:
Esam H Alhamad
Pulmonary Division, Department of Medicine (38), College of Medicine, King Saud University, P. O. Box-2925, Riyadh-11461
Canada

Background: Current protocols for detection of circulating fibrocytes (CFs) in peripheral blood described in various pulmonary and nonpulmonary disorders involve complex and time consuming, non standardized techniques. Objective: Testing a method to rapidly detect and quantify CFs using whole blood lysis flow cytometry-based assay in patients with idiopathic pulmonary fibrosis (IPF) and healthy controls. Methods: One milliliter of venous blood sample in ethylenediaminetetraacetic acid (EDTA) from 33 IPF patients and 35 healthy control subjects was collected. Using whole blood lysis method peripheral blood leukocytes were labeled with monoclonal antibodies for cell surface (CD34 and CD45) and intracellular markers (collagen-1) for flow cytometric analysis. CFs were defined as CD45 + cells coexpressing collagen-I and CD34 molecules. Results: In 29 (87.8%) IPF patients and 10 (28.5%) control subjects, a well-defined highly granular CD45 + cell population was detected in dot plots generated by side scatter properties of CD45 + cells. These CD45 + cells were identified as CFs on the basis of coexpression of collagen-I and CD34; none of the other cell types in the peripheral blood were labeled with these monoclonal antibodies. In IPF patients the percentage of CFs was significantly higher compared to healthy controls (median (range): 1.37% (0.52-5.65) and 1.04% (0.1-1.84), respectively; P = 0.03). Conclusions: Whole blood lysis method combined with fluorescence-activated cell sorting (FACS) allows detecting a well-defined homogeneous population of CFs. This method is simple, reproducible, and provides an accurate and rapid estimation of CFs.


How to cite this article:
Alhamad EH, Shakoor Z, Al-Kassimi FA, Almogren A, Gad ElRab MO, Maharaj S, Kolb M. Rapid detection of circulating fibrocytes by flowcytometry in idiopathic pulmonary fibrosis.Ann Thorac Med 2015;10:279-283


How to cite this URL:
Alhamad EH, Shakoor Z, Al-Kassimi FA, Almogren A, Gad ElRab MO, Maharaj S, Kolb M. Rapid detection of circulating fibrocytes by flowcytometry in idiopathic pulmonary fibrosis. Ann Thorac Med [serial online] 2015 [cited 2020 Nov 26 ];10:279-283
Available from: https://www.thoracicmedicine.org/article.asp?issn=1817-1737;year=2015;volume=10;issue=4;spage=279;epage=283;aulast=Alhamad;type=0