Mycobacterial infection influences bone biomarker levels in patients with Crohn's disease.

Abstract:

:Patients with Crohn's disease (CD) have higher risk for osteoporosis following decreased level of osteocalcin. We hypothesize that active inflammation following Mycobacterium avium subsp. paratuberculosis (MAP) infection results in elevation of undercarboxylated osteocalcin (ucOC) and downregulation of active osteocalcin in CD patients and cow-disease model (Johne's disease). In this study, we measured ucOC, active osteocalcin, and calcium levels in sera from 42 cattle (21 infected with MAP and 21 healthy cattle), 18 CD patients, and 20 controls. The level of ucOC in MAP+ bovine samples was higher than that in MAP- controls (318 ± 57.2 nmol/mL vs. 289 ± 95.8 nmol/mL, P > 0.05). Consequently, mean calcium level in bovine MAP+ was significantly higher than that in bovine-MAP- samples (9.98 ± 0.998 mg/dL vs. 7.65 ± 2.12 mg/dL, P < 0.05). Also, the level of ucOC was higher in CD-MAP+ than in CD-MAP- (561 ± 23.7 nmol/mL vs. 285 ± 19.6 nmol/mL, P < 0.05). Interestingly, the mean osteocalcin level in MAP+ bovine was lower than that in MAP- bovine (797 ± 162 pg/mL vs. 1190 ± 43 pg/mL) and it was lower in CD-MAP+ than in CD-MAP- infection (1.89 ± 0.184 ng/mL vs. 2.19 ± 0.763 ng/mL) (P < 0.05). The correlation between MAP infection and elevation of sera ucOC, reduction of active osteocalcin and increased calcium supports MAP infection role in CD and complications with osteoporosis.

authors

Naser A,Qasem A,Naser SA

doi

10.1139/cjpp-2017-0700

subject

Has Abstract

pub_date

2018-07-01 00:00:00

pages

662-667

issue

7

eissn

0008-4212

issn

1205-7541

journal_volume

96

pub_type

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