Objective To investigate the levels and the abnormal incidences of apolipoprotein and other related indicators in health people in Hunan province,and to provide data for establishment of reference intervals in Hunan province.Methods The people with physical examination (n =341) were chosen from the Second Xiangya Hospital of Central South University during August 2014 ～ October 2014 (male,n =239;female,n =102) with age from 22 to 77 years old.All people were divided into 4 groups according to their age:group A aged from 22 to 42 (35.56 ± 5.39),group B aged from 43 to 48 (45.59 ± 1.59),group C aged from 49 to 55 (51.19 ± 1.81),and group D aged from 56 to 77 (63.08 ±5.84).The levels of apoAI,apoB,Lp (a),hypersensitive C-reactive protein (hs-CRP),and homocysteine (HCY) were detected with automatic biochemical analyzer,and were compared among different age groups and between male and female in each age group.Results Compared to male,the average levels of apoAI,and Lp (a) were significantly increased (P ＜0.05),and apoB,hs-CRP,and Hcy were significantly decreased (P ＜ 0.05) in the female.The levels of apoB,and hs-CRP were significantly different among 4 age groups (P ＜ 0.05).The abnormal rate in each index among 4 age groups was not significantly different (P ＞ 0.05).For groups A,B and D,the abnormal rate of Hcy was significant higher in male relative to female (P ＜ 0.05).Conclusions All the indices have significant difference between male and female (P ＜0.05).The levels of apoAI,Lp (a),hs-CRP,and Hcy do not change with the changed age.However,apoB has a certain relationship with age.The level and abnormal rate of Hcy are significantly higher in male relative to female.

Background: Ferroptosis, which is caused by an iron-dependent accumulation of lipid hydroperoxides, is a type of cell death linked to diabetic kidney disease (DKD). Previous research has shown that fatty acid binding protein 4 (FABP4) is involved in the regulation of ferroptosis in diabetic retinopathy. The present study was constructed to explore the role of FABP4 in the regulation of ferroptosis in DKD. Methods: We first detected the expression of FABP4 and proteins related to ferroptosis in renal biopsies of patients with DKD. Then, we used a FABP4 inhibitor and small interfering RNA to investigate the role of FABP4 in ferroptosis induced by high glucose in human renal proximal tubular epithelial (HG-HK2) cells. Results: In kidney biopsies of DKD patients, the expression of FABP4 was elevated, whereas carnitine palmitoyltransferase-1A (CP-T1A), glutathione peroxidase 4, ferritin heavy chain, and ferritin light chain showed reduced expression. In HG-HK2 cells, the induction of ferroptosis was accompanied by an increase in FABP4. Inhibition of FABP4 in HG-HK2 cells changed the redox state, sup-pressing the production of reactive oxygen species, ferrous iron (Fe2+), and malondialdehyde, increasing superoxide dismutase, and reversing ferroptosis-associated mitochondrial damage. The inhibition of FABP4 also increased the expression of CPT1A, reversed lipid deposition, and restored impaired fatty acid β-oxidation. In addition, the inhibition of CPT1A could induce ferroptosis in HK2 cells. Conclusion Our results suggest that FABP4 mediates ferroptosis in HG-HK2 cells by inhibiting fatty acid β-oxidation.