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Colorectal cancer is one of the most common malignant tumors,early diagnosis and treatment are the important factors affecting colorectal cancer's prognosis.It has been proved that colorectal cancer's diagnosis combined with biomolecular markers is non-invasive,economical and specific at the same time,biomarkers are valuable in predicting and monitoring the chemoresistance of colorectal cancer.This article mainly reviews the prediction of liver metastasis of colorectal cancer,drug resistance of postoperative chemotherapy in colorectal cancer and the monitoring of drug resistance in the course of chemotherapy by CD44v6.
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Objective:To observe the effect of “Warming Yang and Nourishing Qi” Acupuncture on the acetylcholine receptor (AchR)mRNA expression in neuromuscular junction (NMJ)of the rats with experimental autoimmune myasthenis gravis (EAMG), and to analyze the mechanism of acupuncture treatment for EAMG. Methods:AchRα1 129-145 peptide fragments were used to immune the 60 female Lewis rats to establish the EAMG rat models. 30 EAMG rats were selected randomly and divided into model control group,acupuncture treatment group and drug control group (n = 10).Another 10 SPF- “grade three”female Lewis rats,which were raised together with EAMG rats,were used as blank control group. The rats in model control group and blank control group had no treatment.The rats in acupuncture treatment group were treated with “Warming Yang and Nourishing Qi”Acupuncture.The rats in drug control group were treated with pyridostigmine bromide by gavage. The tissue samples in NMJ of gastrocnemius of the rats were collected,and the expression levels of AChR mRNA were detected with Real-time PCR method; the differences among various groups were analyzed quantitatively. Results:Compared with blank control group,the expression levels ofγ-AChR mRNA andε-AChR mRNA in NMJ of the rats in acupuncture treatment group drug control group and model control group were significantly increased (P <0.01).Compared with model control group,theγ-AChR mRNA andε-AChR mRNA in NMJ of the rats in drug acupuncture treatment group and control group were significantly increased (P < 0.01 ). Conclusion:“Warming Yang and Nourishing Qi”Acupuncture can effectively improve the expression level of AchR mRNA and it is an effective treatment method for myasthenia gravis.
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Objective:To study the influence of “Warming Yang and Nourishing Qi”Acupuncture in the expression levels of acetylcholine receptor protein (AchR)in gastrocnemius neuromuscular junction (NMJ)of the rats with experimental autoimmune myasthenia gravis (EAMG),and to clarify the mechanism of “Warming Yang and Nourishing Qi”Acupucture in the treatment myasthenia gravis (MG).Methods:The female Lewis rats were used to establish the EAMG rat models immuned with AchRα1 129-145 polypeptide fragments.30 EAMG rats were selected randomly and divided into model control group, drug control group, and acupuncture treatment group (n=10),and another 10 rats purchased at the same period were used as blank control group.The rats in drug control group were treated with 1 8.5 mg · kg-1 · d-1 pyridostigmine by gavage. And the rats in acupuncture treatment group were treated with irritating by“Warming Yang and Nourishing Qi”Acupuncture.The rats in blank control group and model control group were not treated .The Lennon symptom scores of the rats in various groups were recorded.After treatment,the tissues of gastrocnemius NMJ of the rats were taken,and the AchR protein expression levels in NMJ of the rats in various groups were detected by Western blotting method. Results:Compared with blank control group,after successfully modelling,the Lennon symptom scores of the rats in model control group, drug control group and acupuncture treatment group before treatment were significantly increased (P<0.01).Compared with model control group,the Lennon symptom scores of the rats in drug control group and acupuncture treatment group after two treatment course were significantly increased (P<0.01 ). Compared with blank control group, the AchR protein expression level in gastronemus NMJ of the rats in model control group was significantly decreased (P<0.01). Compared with model control group, the AchR protein expression levels in gastronemus NMJ of the rats in acupuncture treatment group and drug control group after treatment were significantly increased (P<0.01).Conclusion:“Warming Yang and Nourishing Qi”Acupuncture has good therapeutic effect on the EAMG through increasing the NMJ AchR protein expression level of the EAMG rats.
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We constructed transgenic chicken bioreactor vector, driven by chicken ovalbumin promoter, lentiviral vector and cytomegalovirus (CMV) promoter control vector encoding green fluorescent protein (GFP) and luciferase (Luc) as reporter genes. The three vectors were used to transfect or infect chicken primary oviduct epithelial cells, embryo fibroblasts cells, mouse 3T3-L1 preadipocytes cells and bovine mammary epithelial cells. High efficient and specific expression vector for transgenic chicken bioreactor was determined by detecting fluorescence and luciferase activity. Reporter gene analysis showed that chicken ovalbumin promoter expression vector was not cell type-specific in these four different cells. Additionally, luciferase reporter analysis illustrated that the chicken ovalbumin promoter activity was over 100 times lower than that of the CMV promoter in four different cells. Both of these two reporter genes were expressed in those four different cells infected by lentiviral expression vectors. Similarly, the GFP reached the similar expression level in cells infected by lentivirus and cells transfected with CMV promoter plasmid vectors when the multiplicity of infection was 20. In conclusion, the transgenic chicken bioreactor vector under the control of chicken ovalbumin promoter was not highly efficient and cell type-specific. However, the efficient expression and extensiveness oflentiviral vector could be used for studying chicken oviduct bioreactor.