AB0835 INFLUENCE OF SOCIODEMOGRAPHIC PARAMETERS ON ATHEROSCLEROSIS IN SPONDYLOARTHRITIS PATIENTS

Background

The increased risk of atherosclerosis is most likely multifactorial in patients with Spondyloarthritis (SpA). Ultrasound measurements of Intima Media Thickness and (IMT) Flow Mediated Dilation (FMD) can be used to investigate infra-clinical atherosclerosis [1].

Objectives

We aimed to investigate the relationship between socio-demographic parameters in SpA patients with the IMT and FMD.

Methods

It was a case control study conducted over a period of 12 months and including patients with SpA, aged less than 50 years old and without cardiovascular disease, and age and sex matched healthy controls. Sociodemographic and clinical features were recorded in our patients. All subjects had Doppler ultrasound with measurement of carotid IMT and FMD.

Results

There were 47 SpA patients and 47 controls. The median age was 36 years for patients group (18-50) and 32 years for controls (18-50). For the patients group: there were 14 female (28.8%) and 33 male (70.2%). The median duration of the disease was 11 years (1-32). For the marital status, 55.32% were single, 40.43% were married, and 4.26% were divorced. Thirty seven patients (79%) were living in an urban area. For the education level, 17% had a primary education, 64% a secondary education, and 19% were university graduates. Occupational status was recorded as follows: 17% unemployed, 11% students, and 72% employed.

The median IMT was 0.55 millimeters (mm)(0.32 -0.83). We found a higher mean, right and left IMT (p<0.0001) in SpA patients compared with controls. Carotid IMT was positively correlated with age (p<0.0001; r=0,578). The analysis by 10-year age group showed a statistically significant difference in the IMT between patients (p=0.004). Median IMT increased significantly with age (every 10 years). IMT was significantly associated with occupational status (p=0.036); unemployed patients had the higher IMT (0.58 mm).

The median FMD was 14.6% (2-32%). A significantly lower FMD (p=0.008) was noted in SpA patients compared with controls. FMD were negatively correlated with age (p=0.017; r=-0,347). FMD was also associated with sex (p=0.036), and with the marital status (p=0.013). The median FMD was significantly lower in male 13.8% (IQR;8-17.5) vs 22.5% (IQR; 10-25), and married patients (10%; 6-18). There was no significant difference with the other sociodemographic variables (living environment, educational level, occupation). In multiple regression analysis, age was an independent predictor of increased carotid IMT (B=0.004; T=3.146; p=0.003; CI 95% 0.001-0.006].

Conclusion

Our study showed that subclinical atherosclerosis in patients with SpA was strongly associated with age, although we included young patients with a limit age at 50 years.

References

[1]Yuan Y, Yang J, Zhang X, Han R, Chen M, Hu X, et al. Carotid Intima-Media Thickness in Patients with Ankylosing Spondylitis: A Systematic Review and Updated Meta-Analysis. J AtherosclerThromb. 2019;26(3):260-271.

Disclosure of Interests

None declared

AB0845 IMPORTANCE OF WEIGHT MANAGEMENT ON ENDOTHELIAL FUNCTION IN SPONDYLOARTHRITIS

Background

Subclinical atherosclerosis is not rare in spndyloarthritis (SpA) patients. Endothelial dysfunction is the first step of atherosclerosis process. Obesity is a major traditional cardiovascular risk factor.

Objectives

The purpose of our study was to determine the association of anthropometric measures with endothelial dysfunction in non-obese SpA patients.

Methods

This was a prospective study conducted over 12 months and including 47 SpA free cardiovascular disease patients and aged less than 50 years. The following anthropometric parameters were collected for each patient: weight, height, Body Mass Index (BMI), hip and waist circumferences. Endothelial dysfunction was assessed by the ultrasound evaluation of the Flow Mediated Dilatation (FMD).

Results

There were 14 female (28.8%) and 33 male (70.2%). The median age was 36 years (IQR; 18-50). The median disease duration was 11 years (IQR; 1-32). The median weight, height and BMI were 69 (IQR; 43-95), 170 cm (IQR; 144-193) and 24.5 kg/m2 (IQR; 16.33 - 29.41), respectively. Overweight (BMI: 25-29 kg/m2) was noted in 40% of patients. The median hip and waist circumferences were respectively 100 cm (IQR; 84-116) and 88 cm (IQR; 70-114). Median FMD was 18.18% (IQR; 12.8-23.1). We didn’t found correlation between anthropometric parameters and FMD: weight (p=0.225; r=-0.180); height (p=0.273; r=-0.163), BMI (p=0.437; r=-0.116); waist circumference (p=0.22; r=-0.182) and hip circumferences (p=0.142; r=-0.217).

Conclusion

Our study showed that anthropometric parameters do not influence endothelial function in non-obese and young SpA patients. This highlights the importance of weight management and maintaining a healthy weight in SpA patients.

Disclosure of Interests

None declared

Cloning and molecular modelling of turkey pancreatic lipase: structural explanation of the increased interaction power with lipidic interface

Starting from total pancreatic mRNAs, turkey pancreatic lipase (TPL) cDNA was synthesized by RT-PCR and cloned into the PGEM-T vector. Amino acid sequence of the TPL is compared to that of human pancreatic lipase (HPL). A 3-D structure model of TPL was built using the 3-D structure of HPL as template, given the high amino acid sequence homology between the two lipases. Based on this model, the enhanced interaction power of TPL, as compared to that of HPL, into a phosphatidylcholine monolayer film, could be explained. We concluded that an increase in the exposed hydrophobic residues on the surface of TPL would be responsible for an enhanced interaction with a lipidic interface.