In this paper,the teaching in medical microbiology experiment to the first group of foreign students in our college is analyzed and summarized,which will give us many experiences for later teachering.

As a representative of controlled release preparations, osmotic pump has become a hot spot in the new preparation researches of Chinese materia medica (CMM). This paper reviewed CMM osmotic pump preparation from the following aspects: structure type of osmotic pump preparation, adjuncts of osmotic pump preparation of CMM, in vivo evaluation, and problems existing currently, which aimed to provide ideas and methods for the development of CMM osmotic pump preparation.

Hearing Loss ; genetics ; Humans ; Mitochondria ; genetics ; Mutation

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?DJ-1 has been reported to act as aredox-activated chaperone and sensor of oxidative stress participated in a variety of activities in cellular, playing an important role in resisting oxidative stress, regulating signaling pathways and gene transcription, and maintaining mitochondria dynamic balance. DJ -1 is closely related to the occurrence and development of various diseases. Recently, the effect of DJ-1 in eye diseases has drawn more attention, and researchers have found its significant role of resistance to oxidative stress in the pathogenesis of Fuchs endothelial corneal dystrophy ( FECD) and age-related macular degeneration ( AMD ) .This review will state the mechanism of DJ-1 against oxidative stress and its role in the development of eye diseases.

Respiratory dysfunction is the primary cause of death early after cervical spinal cord injury, and it can be restored by electrical stimulation, magnetic stimulation, nerve transfer surgery, and cell transplantation. This paper reviewed the anatomy, clinical manifestations,and associated restoration techniques of respiratory muscle dysfunction after cervical spinal cord injury.

Eosinophilic gastroenteritis (EGE) is a rare chronic disease of digestive system, characterized by the eosinophil infiltration of the gastrointestinal tract and the thickening of the gastrointestinal wall. At present, the etiology and pathogenesis of EGE are still unclear. Accompanied with eosinophilia and elevation of serum immunoglobulin E, the clinical manifestations of EGE are dependent on the location of lesions and the extent or depth of eosinophil infiltration in the gastrointestinal tract. The thickening or edema of the gastrointestinal wall, nodular-like changes, intestinal stenosis and ascites can be regarded as common radiological findings of EGE, while erythema, hyperemia or edema, erosion and ulcer of mucosal are the endoscopic features of EGE. Tissue biopsy is helpful for the diagnosis of EGE. However, with unspecific clinical manifestations, laboratory tests, radiological and endoscopic findings and unidentified cut-off count of pathological diagnostic criteria, EGE is very difficult to be diagnosed. Therefore, this paper mainly reviews the research progress in the diagnosis and treatment of EGE, attempting to improve the clinicians' understanding of EGE.

Objective To construct miRNA-29b1 gene knockout mice based on CRISPR/Cas9 technology. Methods To design and synthesize sgRNA according to the miRNA-29b1 sequence in Genbank .sgRNA and Cas9 were transcribed to RNA in vitro, these RNA were then microinjected into zygotes of C 57BL/6 mice.After mouse birth, the genome DNA was extracted and sequenced to identify its genotype; meanwhile , real-time PCR was used to assay the expression of miRNA-29b1 in the heart, liver, spleen, lung and kidney of mutated mice .Result A 20 bp sgRNA targeted on miRNA-29b1 was synthesized and transcribed to RNA with Cas 9.After microinjection, miRNA-29b1 gene-mutated mice were obtained.The sequencing results showed that there were two types of genotype for the mutated mice , one was 10 bp deletion, and another was 23 bp deletion accompanied with a 3 bp insertion.Compared with the wild-type mice, the expression of miRNA-29b1 in the heart, liver, spleen, lung and kidney was reduced significantly .Conclusions miRNA-29b1 gene knockout mice are constructed successfully by using CRISPR /Cas9 technology.

Objective To knockout Rag2 and IL2rg genes and construct severe combined immunodeficiency mice based on CRISPR/Cas9 technology. Method Design and synthesis of 25 bp sgRNA were made according to the Rag2 and IL2rg sequences in Genbank. After annealing, sgRNA was cloned into pX330 vector. Recombination plasmid Rag2?sgRNA, IL2rg?sgRN and Cas9 were then transcribed into RNA, these RNA were microinjected into zygotes and the zygotes were transplanted into recipient ICR mice. F0 founders were born and mutated F0 founders mated with wild type mice to obtain F1 generation heterozygous mice. Mutated F1 mice were crossed and got F2 generation homozygous mice. Genotype and phenotype of the knockout mice were identified by sequencing, flow cytometry and xenograft model. Results Rag2?sgRNA and IL2rg?sgRNA recombination plasmids were constructed and transcribed into RNA. After microinjection and mat? ing, F0 founders were born and F2 homozygous mice were obtained. The results of sequencing showed that there were two types of genotype in IL2rg gene, 10 bp or 11 bp deletion;however, there was only one genotype in Rag2 gene, which was 8 bp deletion. Compared with wild?type BALB/c mice, the number of CD3 +, B220 + and NKp46 + cells in peripheral blood of the knockout mice was reduced significantly. After inoculation of human breast cancer cell line SKBR?2HL cells, tumor size in the xenograft mouse model was increased gradually along with time extension. Conclusion CRISPR/Cas9 is an efficient way to mutate Rag2 and IL2rg gene in mice in vivo, leading to aberrant T cells, B cells and NK cells.

Folic Acid ; administration & dosage ; therapeutic use ; Humans ; Neural Tube Defects ; prevention & control