The development of education in rehabilitation medicine in China were analyzed and some solutions were suggested: increasing the investment in rehabilitation education; strengthening the teaching staff to improve the quality of teaching; establishing a standardized vocational system; intensifying the rehabilitation education for medical students.

Objective To investigate the function and possible action mechanisms of microRNA hsa-mir-634 in Vero cells.Methods The binding sites for hsa-mir-634 in the 3' UTR of cyclin D1 (CCND1) were predicated by bioinformatics methods.Then,the 3'UTR sequence of CCND1 containing the binding sites for hsamir-634 was amplified by PCR.Site-directed mutagenesis was used to create mutations in the binding sites.The wild and mutant 3' UTR sequences of the CCND1 gene were ligated into the psi-CHECK2 vector separately to construct dual-luciferase reporter vectors,including CHECK2-CCND1 wild,CHECK2-CCND1 mut 1,CHECK2-CCND1 mut 2 and CHECK2-CCND1 mut 3.Then,293T cells were transfected with the four constructed plasmids,and luciferase activity was measured 48 hours after the transfection.Vero cells were transfected with hsa-mir-634 mimics and negative control separately,and harvested after additional culture for different durations; the Vero cells remaining untreated served as the blank control.Subsequently,fluorescence-based quantitative PCR and Western blot were performed to detect the mRNA and protein expressions of CCND1 respectively in,3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium,inner salt (MTS) assay to evaluate the proliferation of,and flow cytometry to detect the apoptosis in,Vero cells.Results The binding sites for hsa-mir-634 in the 3'UTR of CCND1 were successfully predicated.Sequencing results showed the successful construction of dual-luciferase reporter vectors.As the luciferase assay revealed,the overexpression of hsa-mir-634 could significantly inhibit the CCND1 3'UTR-mediated luciferase activity.Compared with the negative control,the hsamir-634 mimics markedly decreased the protein expression of CCND1,but had no obvious effect on the mRNA expression of CCND1 in Vero cells.The proliferation of Vero cells transfected with hsa-mir-634 mimics was significantly restrained compared with those transfected with the negative control,and the strongest restraining effect was observed on day 4 after the transfection.In addition,the overexpression of hsa-mir-634 also induced the apoptosis of Vero cells,with the apoptosis rate being 8.03％,7.96％ and 17.33％ in the blank control group,negative control group and mimics group respectively.Conclusion Hsa-mir-634 may regulate the proliferation and apoptosis of Vero cells via influencing the expression of CCND1.

Extranodal natural killer/T cell lymphoma (ENKTL) is an EBV-associated and highly aggressive subtype of non-Hodgkin lymphoma. Most patients are distributed in Asia and South America, and advanced-stage patients have poor prognosis. Reports on research progress of ENKTL in the 58th American Society of Hematology Annual Meeting covered multiple respects which range from basic research to clinical prognosis and treatment: further study on pathogenesis of ENKTL is developing based on high-throughput sequence, and new prognostic index system can help to stratify patients more exactly; what's more, novel regimens make more benefits to the clinical efficacy and safety of ENKTL patients.

Marginal zone lymphoma (MZL) accounts for approximately 10 % of non-Hodgkin lymphoma (NHL). It can be divided into three specific entities:extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma), nodal marginal zone lymphoma (NMZL) and splenic marginal zone lymphoma (SMZL). MALT lymphoma is the most frequent overall, representing 7.5 % of all NHLs. Reports on research progress of MZL in the 58th American Society of Hematology Annual Meeting covered multiple respects which ranged from basic research to clinical prognosis and treatment. Based on the technology such as flow cytometry, cytogenetics and FISH, further study on pathogenesis of MZL is developing, and new prognostic index system can help to stratify patients more exactly and give a guidance to treatment. What's more, the change of therapy and new drugs will benefit to the clinical efficacy and safety of MZL patients.

The herpes simplex virus(HSV) Us3 gene encodes a ser/thr protein kinase(PK).As an accessory gene,it plays an important role in the regulation of the apoptosis of infected cells and virus release.Us3-induced alterations in the host cytomorphology are associated with enhanced intercellular virus spread,suggestive of a previously undescribed aspect of alphaherpesvirus spread.

Peripheral T-cell lymphoma (PTCL) is a relatively common subtype of non-Hodgkin lymphoma in China. PTCL is clinically highly aggressive, and it progresses rapidly. The current treatment methods are ineffective and the overall prognosis is poor. The 62nd American Society of Hematology Annual Meeting reported on the progress of PTCL molecular targeted therapy and immunotherapy, including programmed death receptor 1/programmed death receptor ligand 1 antibodies, JAK inhibitors, brentuximab vedotin, etc. These novel drugs bring a better prospect for patients.

Chronic lymphocytic leukemia (CLL) is an oncologic disease with clonal proliferation of lymphocytes. In recent years, great advances have been made in the basic and clinical research of CLL. The 62nd American Society of Hematology Annual Meeting in 2020 presented a detailed report on the latest advance in basic research on these diseases, providing a deeper understanding of how CLL occurs and develops, and playing a guidance role in the clinical treatment.

Objective Up to now, there has been no sure cure for genital herpes (GH), and vaccine seems a most promis-ing approach to the prevention and treatment of herpes simplex virus Ⅱ(HSV-2) infection.In this study, we investigated the feasibili-ty of preparing a dendritic cell ( DC) vaccine modified by the adenovirus-mediated HSV-2 gD gene. Methods We subcloned the HSV-2 gD gene into the vector Shuttle-2 and constructed the recombinant adenovirus pAdeno-HSV-2 gD following identification by en-zyme digestion and DNA sequence analysis .We isolated DCs from the mouse bone marrow , analyzed their phenotypes by flow cytome-try after transfection with the recombinant adenovirus pAdeno-HSV-2 gD, and determined the expression of HSV-2 gD by immunohisto-chemistry, RT-PCR, SDS-PAGE, and Western blot. Results Based on HSV-2 DNA, the corresponding target fragments were am-plified with the gD gene primers.Agarose gel electrophoresis showed the correct size of the PCR product (1182 bp) as predicted.The recombinant adenovirus pAdeno-HSV-2 gD was obtained by transfecting the 293 cells with pAdeno-gD DNA, which had an activity of 4 ×1010 IU/mL.The contents of CD40, CD80, and CD86 were (74.2 ±3.9), (73.9 ±4.1), and (76.1 ±5.5) % in the mature DCs and (81.3 ±3.1), (80.4 ±2.9), and (83.7 ±3.9) % in the pAdeno-HSV-2 gD DCs, significantly increased as compared with those in the immature DCs ([9.7 ±0.5], [7.5 ±1.2], and [5.2 ±1.1] %) (P<0.01).No statistically significant differ-ences were found between the expression of the surface molecules in the pAdeno -HSV-2 gD DCs and that in the cytokine stimulation-in-duced mature DCs (P>0.05).RT-PCR and immunohistochemistry confirmed the expression of HSV-2 gD in DCs.SDS-PAGE and Western blot of the expressed protein showed a new band with an apparent molecular mass corresponding to the predicted size (43000). Conclusion The results of our study have paved the ground for the successful preparation and identification of a dendritic cell vaccine modified by the adenovirus-mediated HSV-2 gD gene.

Objective To probe into the gene therapy of psoriasis using antisense oligonucleotides to attenuate the expression of K14 gene and protein in keratinocytes and evaluate the inhibitory effects of liposome conjugated antisense oligonucleotides on the proliferation of keratinocytes. Methods The antisense, sense and mismatched oligonucleotides for K14 gene were synthesized and conjugated with lipofectin respectively. Finally they were subsequently transfected into cultured keratinocytes in vitro. The expression of K14 gene was tested by reverse transcription polymerase chain reaction (RT-PCR). The expression of K14 protein was measured by immunohistochemistry. The variation of cell growth cycle was detected by flow cytometry. Results The expression of K14 gene and protein was markedly decreased in keratinocytes treated with K14 antisense oligonucleotides. The cell growth cycle was inhibited effectively by antisense oligonucleotides with lipofection, but not by sense and mismatched oligonucleotides. Conclusions Antisense oligonucleotides conjugated with lipofectin might be a hopeful method to inhibit the proliferation of keratinocytes by inhibiting the expression of K14 mRNA and protein.

Objective To study the dynamic imaging changes of the uterine leiomyomas before and after uterine arterial embolization (UAE) treatment and to discuss its therapeutic mechanism. Methods Color Doppler senography and both plain and enhanced MR[scanning were performed in 45 patients with uterine leiomyomas before and after UAE. Plain CT scan was performed in all patients after UAE. All the patients were followed up for 3-16 months (average 10±3.5 months). Results In 41 of the total 45 cases, the color Doppler senography showed rich blood flow signals in leiomyomas and myometrium before UAE and no or less blood flow signals in both leiomyomas and myometrium on the first day after UAE. On the seventh day, the blood flow signal was still absent in leiomyomas while it was restored in myometrium, and the same phenomena remained in the first, the third and the twelfth month after UAE. In the other four eases, color Doppler sonography demonstrated blood flow signals inside leiomyomas on the seventh day after UAE and it remained till twelve months after embolization. The embolic agent (Lipiodol) was found in both leiomyomas and myometrium on CT scan for 45 cases on the first day of UAE. CT scan also showed the deposit of the Lipiodol in myometrium, but Lipiodol gradually vanished in leiomyomas at one, three and the twelve months after UAE. The enhancement was apparent in leiomyomas and myometrium on MRI scan in all 45 cases before UAE. The enhancement was found in the myometrium, but not in leiomyomas, on MRI scan in 39 cases 3 months after UAE. The other six cases demonstrated different degrees of enhancement in leinmyomas after embolization. In two cases the detachment of the leiomyomas were observed after embolization and the desquamating materials were pathologicallyproved to be necrotic tissue. The difference in the measuring data about leiomyoma volume between MPI and color Doppler sonography was of no statistical significance (P > 0.05). Conclusion The therapeutic mechanism of UAE for uterine leiomyomas is selectively embolizing the vascular bed of uterus, leading to subsequent necrosis of leiomyomas. The color Doppler sonography should be the fast choice for the dynamic imaging follow-up after UAE.