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The present study was designed to investigate the myocardial expression of liver X receptor alpha (LXRα) in a streptozotocin (STZ)-induced diabetic rat model. Immunohistochemical staining, quantitative real-time RT-PCR, and Western blot analysis were used to determine the expression of LXRα in the myocardium of STZ-induced diabetic rats. The myocardial expression of LXRα target genes, long-chain acyl-CoA synthetase 3 (ACSL3), fatty acid transporter protein (FAT/CD36), ATP-binding cassette transporter A1 (ABCA1), and ABCG1 were also detected. Bisulfite sequencing analysis was employed to examine the methylation status of the CpG island at the LXRα promoter region in the myocardium of STZ-induced diabetic rats. We found that LXRα mRNA and protein expression in the left ventricles, right ventricles, and atria of diabetic rats were gradually increased during the progression of diabetic cardiomyopathy (DCM). The mRNA expression levels of ACSL3 and FAT/CD36 and the protein expression levels of ABCA1 and ABCG1 were also markedly increased in different heart chambers of diabetic rats. Moreover, there was a significant difference in the methylation status of LXRα gene between the ventricles of control and diabetic rats (P < 0.05). Our findings suggest that elevated expression of LXRα may be involved in the progression of DCM, and demethylation of LXRα is likely to be responsible for its increased expression in myocardial tissues.

Even with a favorable prognosis, the health-related quality of life (HRQoL) of papillary thyroid carcinoma (PTC) patients remains unclear and conflicting. Thus, in the present study, we compared the HRQoL of PTC patients with that of the general population (GP).The study was performed in our thyroid and parathyroid surgery department, and 186 PTC patients who had undergone thyroidectomy were included. The exclusion criteria were an age < 18 years, no follow-up, and the presence of other malignant neoplasms. The control group included 186 volunteers who were matched by age, gender, and socioeconomic status. The survivor and control groups were asked to complete the Chinese version of the SF-36 questionnaire.The 186 volunteers from the GP were well matched to PTC patients with respect to the baseline demographic characteristics. PTC patients showed significantly lower scores than those of the control group in 7 domains of the HRQoL: role-physical (RP), bodily pain (BP), general health (GH), vitality (VT), social functioning (SF), role-emotional (RE), and mental health (MH). PTC was a risk factor for a low Physical Component Summary (PCS) score and a low Mental Component Summary (MCS) score (all P values were less than .05). Significant reductions in the scores of all 8 domains were observed at 1 month after the operation, and obvious recovery was noted at 6 months according to the PCS and MCS scores (all P values were less than .05). However, even 2 years after surgery, few domain scores had recovered to levels found in the GP, including the PCS and MCS scores (all P values were less than .05).Due to the decreased preoperative and postoperative HRQoL scores, much attention should be given to and more long-term observation should be performed for PTC patients, even those who have undergone surgery.

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