Abnormal rheological properties of red blood cells as a potential marker of Gulf War Illness: A preliminary study, 2018, Condon et al

Andy

Retired committee member
Abstract: BACKGROUND:Veterans with Gulf War Illness (GWI) experience chronic symptoms that include fatigue, pain, and cognitive impairment. This symptom cluster may be the consequence of impaired tissue oxygen delivery due to red blood cell (RBC) dysfunction.

OBJECTIVE:The purpose of this preliminary study was to determine whether the microrheological behavior of RBCs is altered in GWI.

METHODS:We recruited 17 cases of GWI (GWI+) and 10 age matched controls (GWI–), and examined RBC deformability and aggregation via ektacytometry along with measurement of complete blood counts.

RESULTS:RBCs were more deformable in GWI+, as indicated by higher elongation indices particularly at higher shear stress values (5.33, 9.49, and 16.89) when compared to GWI–. Aggregation formation, stability and kinetics were similar between GWI+and GWI–. Complete blood counts were also similar, with the exception of mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), and RBC distribution width (RDW) which was elevated in GWI+.

CONCLUSIONS:In this preliminary study, we observed increased deformability along with increased MCH, MCHC and RDW in veterans with GWI+, which may contribute to the symptomatology of GWI. Further research is required to confirm our findings and the role of RBC microrheology in GWI.
Paywalled at https://content.iospress.com/articles/clinical-hemorheology-and-microcirculation/ch170262
 
Ron Davis and co seem to be finding the opposite with ME, reduced deformability:

OMF-funded research: red blood cell deformability in ME/CFS
March 21, 2018

https://www.omf.ngo/2018/03/21/omf-funded-research-red-blood-cell-deformability-in-me-cfs/

On this #OMFScienceWednesday, we present a new project that we are funding that will evaluate the ‘deformability’ of red blood cells as a potential biomarker for ME/CFS. Red blood cells (RBCs) are the most common cells in the blood. Their main role is to transport oxygen and carbon dioxide in the blood, and this role depends in part on their ‘deformability’ / elasticity as they flow through small blood vessels. Alterations in RBC deformability have been associated with inflammation and diseases like sepsis, and some studies suggest that RBC damage occurs in ME/CFS. These observations along with new technology available for measuring RBC deformability prompted Dr. Ron Davis’ team at Stanford and their collaborators at San Jose State University to examine RBC deformability in ME/CFS.

In some very early data generated by this team, there are indications that RBC deformability is reduced in some ME/CFS patients. The ME/CFS RBCs tested so far seem to move more slowly and elongate less than healthy controls, according to tests with this new technology. We are funding a project to confirm these findings in additional patients, and to study RBCs using additional methods, including various types of advanced microscopy, to better understand why these differences exist. If these experiments are successful, they may establish a new biomarker for ME/CFS that could assist in diagnosis and possibly finding new treatments! Stay tuned for more.

Learn more about RBCs in this Khan Academy video:




 
Les Simpson found altered blood shapes in ME too. This may, if true, distinguish the two illnesses (although obviously a history of service in the Gulf War is a big giveaway in most cases), but it's such a tiny sample size I'm not sure it's accurate. I'm inclined to think RBCs should be similar in both illnesses.
 
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