Title:Decreased Plasma Level of Lipoprotein Lipase Predicted Verbal Disfluency in Chinese Type 2 Diabetes Mellitus Patients with Early Cognitive Deficits
Volume: 18
Issue: 8
Author(s): Ke An , Peng Guo, Haoqiang Zhang, Wenwen Zhu , Wuyou Cao, Jijing Shi and Shaohua Wang*
Affiliation:
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, No. 87 Ding Jia Qiao Road, Nanjing, 210009,China
Keywords:
Lipoprotein lipase, mild cognitive impairment, executive function, memory function, type 2 diabetes mellitus,
rs328.
Abstract:
Background: Lipoprotein Lipase (LPL) is the rate-limiting enzyme catalyzing the hydrolysis
of triglycerides and contributes to the amyloid-β formation, which shows promise as a
pathological factor of cognitive decline in Type 2 Diabetes Mellitus (T2DM). This study aimed to
investigate the pathogenetic roles of LPL and rs328 polymorphism in Mild Cognitive Impairment
(MCI) in patients with T2DM.
Methods: Chinese patients with T2DM were recruited and divided into two groups based on the
Montreal Cognitive Assessment score. Demographic data were collected, LPL was measured and
neuropsychological test results were examined.
Results: Seventy-nine patients with diabetes and MCI had significantly decreased plasma LPL levels
(p = 0.007) when compared with health-cognition controls (n = 91). Correlation analysis revealed
that LPL was positively correlated with clock drawing test (r = 0.158, p = 0.043) and logical
memory test (r = 0.162, p = 0.037), while lipoprotein a (r = -0.214, p = 0.006) was inversely associated
with LPL. Logistic regression analysis further demonstrated that LPL concentration was an independent
factor for diabetic MCI (p = 0.036). No significant differences were observed in the distributions
of rs328 variants between patients with MCI and the controls. Moreover, no remarkable
association was found among plasma LPL levels, cognitive performances, and lipid levels between
the genotypic subgroups. The trail making test A was increased in the GC group when compared
with the CC genotype in the control group.
Conclusion: Decreased plasma level of LPL could probably predict early cognitive deficits, especially
verbal disfluency.