Cerebral infarction as the first symptom in acute promyelocytic leukemia: A case report and literature review / 中南大学学报(医学版)

In the clinical settings, disseminated intravascular coagulation (DIC) and complications such as hemorrhage are commonly seen in acute promyelocytic leukemia patients, whereas thrombosis is rarely reported. We reported a case here that the patient presented with cerebral infarction as the first manifestation. During the admission, the patient encountered differentiation syndrome, pulmonary embolism, pulmonary hemorrhage, and myocardial ischemia, as well as bleeding and thrombosis complications. Hence the patient was diagnosed as DIC. After the treatment of blood transfusion instead of anticoagulation, his condition was stable and the remission was completely achieved. The treatment experience provides guides for other patients with similar complications of simultaneous bleeding and thrombosis.

Protective effects and mechanisms of Xingnaojing Injection on early global brain ischemic-induced deep coma in rats / 中南大学学报(医学版)

To study the protective effect of Xingnaojing Injection on early global brain ischemia-induced deep coma in rats.
 Methods: The deep coma model was induced by global brain ischemia by using four-vessel occlusion method in male SD rats. According to the body weight, the rats were randomly divided into 8 groups: a model control group, three different dose of Xingnaojing Injection (1.8, 3.6 and 5.4 mL.kg-1) groups, a Xingnaojing Injection (3.6 mL.kg-1) plus PI3K inhibitor group, a naloxone injection (0.04 mL.kg-1) group and a naloxone injection (0.04 mL.kg-1) plus Xingnaojing Injection (3.6 mL.kg-1) group (n=8 per group). In addition, eight animals served as the sham group were performed same operation with the model group excepting no blockage of the blood vessels. After the operation, three different doses of Xingnaojing Injection and/or naloxone injection were given intravenously once a day for three days. Ten μL PI3K inhibitor (LY294002, 10 mmol/L) was injected via anterior cerebral ventricle at once after global brain ischemia. The awakening time after the first drug treatment, the grasping power and the autonomous activity within 10 min after the last drug treatment were recorded. The levels of both dopamine (DA) and glutamate (Glu) in cerebrospinal fluid were detected by ELISA. The pathological changes were observed in brain tissue slices with HE staining and the protein levels of Akt/p-Akt and cAMP-response element binding protein (CREB)/p-CREB in hippocampus were detected by Western blotting.
 Results: Comparing with the model group, single administration of Xingnaojing Injection could significantly shorten the waking time (P<0.05) and continuous administration of Xingnaojing Injection for 3 d could increase grasping power, distance, frequency and duration of autonomous activities (P<0.05 or P<0.01) in the deep coma rat. Also, Xingnaojing Injection could inhibit these increases in neurotransmitters DA and Glu contents (P<0.05 or P<0.01), and improve pathological changes of hippocampal tissue. Xingnaojing Injection significantly induced protein phosphorylation of both Akt and CREB (P<0.05 or P<0.01); this effect was inhibited by PI3K inhibitor (P<0.05 or P<0.01). Moreover, the protective effects of naloxone on awakening time, grasping power, the autonomous activity and hippocampus damage in global brain ischemia-induced deep coma could be enhanced by joint use of Xingnaojing Injection (P<0.05 or P<0.01).
 Conclusion: Xingnaojing Injection could significantly improve deep coma induced by global brain ischemia in rat, which is related to inducing PI3K/Akt-dependent protein phosphorylation of CREB, and reducing hippocampal damage. The protective effect of Xingnaojing Injection is synergistically enhanced by naloxone.

Establishment and evaluation of a mouse model of circulating hepatoma cells / 中国实验动物学报

Objective To establish a mouse model of circulating tumor cells (CTCs) by applying mouse hepatoma Hapa 1-6 cells.Methods 108 healthy male C57BL/6 mice were randomly divided into 3 groups according to their body weights.Hepa 1-6 cell suspension was intravenously injected to each mouse in the three groups at a concentration of 1×106,5×106 and 1×107/mL,0.2 mL per mouse,respectively.Blood samples were collected from the mice on the 1st,5th,9th,13th,17th and 21st days after tumor cell injection.The number,ratio and relative inhibition rate of CTCs were calculated in 20,000 nucleated cells.The mortality of mice was recorded.②80 male C57BL/6 mice were averaged into 2 groups according to their body weight: control and sorafenib tosylate groups.0.2 mL of Hepa 1-6 single cell suspension was injected to each mouse through the caudal vein at a concentration of 5×106/mL.The mice were gavaged with sorafenib tosylate (50 mg/kg) for 21 days and blood samples were collected at the 3rd,8th,15th,and 21st days for CTC assessment.Results For the 1×106/mL group,the CTC inhibition rate was 25.1%,18.1%,8.9%,4.4%,2.9% and 0.3% on the 1st,5th,9th,13th,17th and 21st days,respectively,and all the mice were alive.For the 5×106/mL group,the CTC inhibition rate was 40.4%,35.4%,15.4%,9.0%,6.6% and 4.1% on the 1st,5th,9th,13th,17th and 21st days,respectively,and all the mice were alive.For the 1×107/mL group,the CTC inhibition rate was 39.1% and 33.5% on the 1st and 5th days,respectively.Some mice died immediately after intravenous injection and all mice died within 7 days.②The relative clearance of CTCs was-7.5%,4.6%,55.3% and-94.5% on the 3rd,8th,15th and 21st days of sorafenib tosylate administration.Compared with the control group,there were significant differences among the three groups (P<0.05 or P<0.01).Conclusions A mouse model of circulating hepatoma cells has been established by intravenous injection of 0.2 mL of 5×106/mL mouse Hepa 1-6 cell suspension.This mouse model can be used for screening and evaluation of drugs for circulating tumor cell inhibition.