OBJECTIVES: To assess the regulatory effect of cannabidiol (CBD) on circadian rhythm sleep disorders following general anesthesia and explore its potential mechanism in a rat model of propofol-induced rhythm sleep disorder. METHODS: An electrode was embedded in the skull for cortical EEG recording in 24 male SD rats, which were randomized into control, propofol, CBD treatment, and diazepam treatment groups (n=6). Eight days later, a single dose of propofol (10 mg/kg) was injected via the tail vein with anesthesia maintenance for 3 h in the latter 3 groups, and daily treatment with saline, CBD or diazepam was administered via gavage; the control rats received only saline injection. A wireless system was used for collecting EEG, EMG, and body temperature data within 72 h after propofol injection. After data collection, blood samples and hypothalamic tissue samples were collected for determining serum levels of oxidative stress markers and hypothalamic expressions of the key clock proteins. RESULTS: Compared with the control rats, the rats with CBD treatment showed significantly increased sleep time at night (20:00-6:00), especially during the time period of 4:00-6:00 am. Compared with the rats in propofol group, which had prolonged SWS time and increased sleep episodes during 18:00-24:00 and sleep-wake transitions, the CBD-treated rats exhibited a significant reduction of SWS time and fewer SWS-to-active-awake transitions with increased SWS aspects and sleep-wake transitions at night (24:00-08:00). Diazepam treatment produced similar effect to CBD but with a weaker effect on sleep-wake transitions. Propofol caused significant changes in protein expressions and redox state, which were effectively reversed by CBD treatment. CONCLUSIONS CBD can improve sleep structure and circadian rhythm in rats with propofol-induced sleep disorder possibly by regulating hypothalamic expressions of the key circadian clock proteins, suggesting a new treatment option for perioperative sleep disorders.
Animals ; Rats, Sprague-Dawley ; Male ; Cannabidiol/therapeutic use* ; Rats ; Circadian Rhythm/drug effects* ; Propofol/adverse effects* ; Anesthesia, General/adverse effects* ; Sleep Wake Disorders/chemically induced* ; Hypothalamus/metabolism* ; Electroencephalography

Objective To investigate the expression of Scinderin(SCIN myoprotein) in breast cancer tissues and adjacent tissues,and to explore the relationship between the expression of Scinderin and different molecular subtypes of breast cancer as well as the clinical factors.Methods Immunohistochemical staining method was used to detect the expression of SCIN in 120 cases of breast carcinoma and 30 adjacent tissues.The relation between SCIN expression in breast cancer tissue and molecular subtypes,pathologic stage,age,tumor size,lymph node metastasis was analyzed.Results SCIN expression level in breast cancer tissue was lower than in the tissues adjacent to carcinoma (6.06±3.32 vs 7.77±3.32,P＜0.05).SCIN expression was associated with breast cancer molecular subtypes (P＜0.05),and it was irrelevant with age,tumor size,histological grade,lymph node metastasis,or clinical stage (P＞0.05).Conclusions The expression of SCIN in breast cancer tissues was lower than in the adjacent tissues.It is associated with breast cancer molecular subtypes.SCIN could become the protein markers of breast cancer molecular targeted therapy.

Objective To explore the influence between perioperative nutritional support and outcome of refractory constipation patients complicated with megacolon.Methods Seventy-three patients with refractory constipation complicated with megacolon receiving surgical interventions were enrolled,both by gastrointestinal decompression and total parenteral nutrition support treatment.Thirty-seven cases who could not recover intestinal tract unobstructed,did not receive enteral nutrition support treatment and surgery as control group; 36 cases of patients with intestinal recovery unobstructed,after 2 weeks of total enteral nutrition support undergoing elective surgery as observation group.The nutrition indicators,surgery and postoperative complications between two groups were compared.Results The operation time and intraoperative blood loss compared between two groups had no significant difference (P ＞0.05).The operation method between two groups was statistically significants (P ＜ 0.05).The incidence of anastomotic bleeding,anastomotic fistula and pneumonia in observation group were lower than those in control group [2.8％ (1/36) vs.21.6％ (8/37),0 vs.13.5％ (5/37) and 0 vs.13.5％ (5/37)],there were significant differences (P ＜ 0.05).The hospitalization time,incidence of incision infection,urinary retention,intestinal obstruction between two groups had no significant difference (P ＞ 0.05).The postoperative hospital stay in observation group was shorter than that in control group [(12 ± 3) d vs.(25 ± 6) d],there was significant difference (P ＜ 0.05).The index comparison on admission similar between two groups had no statistical significance (P ＞0.05).The preoperative fat weight,fat mass and serum albumin,transferrin and prealbumin in observation group were higher than those in control group [(41.9 ± 7.6) kg vs.(38.7 ± 3.0) kg,(13.2 ± 4.0) kg vs.(7.8 ± 2.7) kg,(37.9 ± 2.6) g/L vs.(31.3 ± 2.5) g/L,(2.9 ± 0.6) μ g/L vs.(2.0 ± 0.6) μ g/L,(243.7 ± 25.2) mg/L vs.(141.2 ± 11.9) mg/L],there were significant differences (P ＜ 0.05).After 1 month,the weight,fat weight,protein quality,fluid in cells and extracellular fluid,body mass index,albumin,transferrin in observation group were better than those in control group [(55.1 ± 6.4) kg vs.(50.9±4.7) kg,(42.9 ± 3.2) kgvs.(39.1 ± 1.3) kg,(12.2 ± 1.4) kg vs.(9.7 ± 3.2) kg,(23.7 ± 5.0) Lvs.(18.8 ± 5.5) L,(10.9 ± 4.5) L vs.(7.7 ± 0.8) L,(22.3 ± 1.9) kg/m2 vs.(17.5 ± 3.6) kg/m2,(41.9 ± 4.7) g/L vs.(33.1 ± 2.9) g/L and (3.5 ± 0.7) μg/L vs.(2.7 ± 0.5) μg/L],there were significant differences (P ＜0.05).Conclusion Refractory constipation complicated with megacolon requires surgical intervention,should as far as possible to restore the intestinal function preoperatively,enteral nutrition support treatment,can significantly reduce the incidence of perioperative complications.

Objective To explore the effect of infrasound on the expression of glial fibrillary acidic protein (GFAP) after cerebral ischemia/reperfusion in rats. Methods The model of cerebral ischemia/reperfusion in rats was induced with intraluminal middle cerebral artery occlusion (MCAO) with nylon monofilament suture. 36 male adult Sprague-Dawley rats were randomly divided into sham group (n=12),model group (n=12) and infrasound group (n=12), then each group was randomly divided into 3 d and 7 d subgroups, with 6 rats in each subgroup.The infrasound group was treated with infrasound for 2 h every day 12 h after operation, the model group was treated in the same way turning off the power, the sham group received no treatment. They were evaluated with the modified Neurological Severity Score (mNSS) 3 and 7 d after treatment (before being executed), and brain tissue slices were immunohistochemically stained to observe the expression of GFAP around the ischemic sites. Results Compared to the model group, the mNSS score in 7 d infrasound group decreased significantly (P<0.05), the integral optical density (IOD) of GFAP around the focus was significantly higher in the infrasound group than in the model group (P<0.001). Conclusion Infrasound can increase the expression of GFAP after cerebral ischemia/reperfusion in rats.