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Background: Studies showed that thyroid function plays an important role in the pathology of Alzheimer’s disease (AD). However, changes in brain thyroid hormone and related receptors in the early stage of AD were rarely reported. The aim of this study was to explore the relationship between the early stage of AD and local thyroid hormone and its receptors in the brain. Methods: The animal model was established by stereotactic injection of okadaic acid (OA) into hippocampal region for the experiment, and 0.9% NS for the control. Blood sample from each mouse was collected and then the mice were sacrificed and the brain tissue was collected for detecting free triiodothyronine (FT3), free thyroid hormone (FT4), and thyroid-stimulating hormone (TSH), thyrotropin-releasing hormone (TRH) and phosphorylated tau, amyloid-β (Aβ) and thyroid hormone receptors (THRs) in the hippocampus of the mice were detected as well. Results: Enzyme-linked immunosorbent assay showed that compared with the control, FT3, FT4, TSH and TRH in brain were significantly increased in the experimental group; in the serum, FT4, TSH and TRH were increased, while FT3 had no change; western blot analysis indicated that the expression of THR α and β in the hippocampus of the experimental group was significantly higher than that of the control. Conclusion: Based on the results of this study, a mouse AD model can be established successfully by injecting a small dose of OA into the hippocampus. We speculate that early AD brain and circulating thyroid dysfunction may be an early local and systemic stress repair response.

Objective: The objective is to study the effect of continuous nursing on the vomiting of patients with expectant vomiting of lung cancer, and to establish a three-dimensional segmentation model of PET-CT image, so as to provide an effective nursing intervention for patients with expectant vomiting of lung cancer. Methods: In this study, the sampling method is adopted. We collected 68 patients (over 18 years old) diagnosed with lung cancer from May 2016 to June 2018 as the study subjects. Patients are divided into experimental group and control group. Before discharge, the patients in the control group are given general discharge guidance and health knowledge guidance. The patients in the experimental group are treated with continuous nursing until the next admission, except for general discharge guidance and health knowledge guidance. The cycle is a period of intermittent chemotherapy. According to the general data questionnaire designed by the researchers themselves, the criteria of acute and subacute toxicity of anticancer drugs developed by the World Health Organization (WHO), and the simple coping style questionnaire, the data are collected. SPSS 22.0 is used for analysis. The rank sum test is used in the grading of expected nausea and vomiting. The score of self coping ability is compared within the group by paired sample t-test, and P < 0.05 is statistically significant. Results: First, before continuous nursing, there is no significant difference in the expected nausea and vomiting between the two groups (P = 0.299). After continuous nursing, in the experimental group, nausea and vomiting is significantly improved (P < 0.001). Second, the positive and negative coping scores of the two groups are 15.98±1.11 and 16.99±1.23, respectively. There is no significant difference between the two groups (P > 0.05). After continuous nursing, the experimental group is compared with the control group. There is a significant difference between positive coping score (19.21±2.12) and negative coping score (16.27±1.53) (P < 0.01). Thirdly, the pixels with the standard uptake value (SUV) > 1/4 of the maximum standard uptake value (SUVmax) are selected as the basic tumor range, which can accurately predict the tumor size and range. Conclusion: PET-CT image analysis and continuous nursing can reduce the degree of nausea and vomiting in patients with lung cancer expectant vomiting, predict the size of lung cancer tumor, improve the patients’ self-response ability and the cure rate of tumor, which is worth promoting in patients with lung cancer expectant vomiting.