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2016 ; 93
(ä): 224.e1-6
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Monocyte Mitochondrial Function in Calcium Oxalate Stone Formers
#MMPMID26972146
Williams J
; Holmes RP
; Assimos DG
; Mitchell T
Urology
2016[Jul]; 93
(ä): 224.e1-6
PMID26972146
show ga
OBJECTIVE: To investigate whether mitochondrial function is altered in
circulating immune cells from calcium oxalate (CaOx) stone formers compared to
healthy subjects. MATERIALS AND METHODS: Adult healthy subjects (n?=?18) and CaOx
stone formers (n?=?12) were included in a pilot study. Data collection included
demographic and clinical values from electronic medical records. Bioenergetic
function was assessed in monocytes, lymphocytes, and platelets isolated from
blood samples using the Seahorse XF96 Analyzer. Plasma interleukin-6 (IL-6) was
measured using enzyme-linked immunosorbent assay. RESULTS: All participants were
age matched (44.5?±?3.0 years for healthy subjects vs 42.3?±?4.8 years for CaOx
stone formers, P?=?.6905). CaOx stone formers did not have urinary tract
infection, ureteral stones, or obstructing renal stones. Monocyte mitochondrial
function was decreased in CaOx stone formers compared to healthy subjects.
Specifically, mitochondrial maximal respiration (P?=?.0011) and reserve capacity
(P?.0001) were significantly lower. In contrast, lymphocyte and platelet
mitochondrial function was similar between the 2 groups. The bioenergetic health
index, an integrated value of mitochondrial function, was significantly lower in
monocytes from CaOx stone formers compared to healthy subjects (P?=?.0041).
Lastly, plasma IL-6 levels were significantly increased (P?=?.0324). CONCLUSION:
The present pilot study shows that CaOx stone formers have decreased monocyte
mitochondrial function. Plasma IL-6 was also increased in this cohort. These data
suggest that impaired monocyte mitochondrial function and inflammation may be
linked to CaOx kidney stone formation. Further studies are needed to confirm
these findings in a larger cohort of patients.