Objective To observe the curative effect of erythrocyte separation in the treatment of patients with polycythemia vera (PV). Methods Sixty- five patients with P- were selected, and the patients were divided into control group (20 cases) and observation group (45 cases) according to the treatment method. All patients of 2 groups were treated with oral hydroxyurea and intramuscular interferon, but the patients of observation group combined with erythrocyte separation. The hemoglobin and hematocrit (HCT) before and after treatment and untoward reaction were compared between 2 groups. Results There were no statistical differences in hemoglobin and HCT before treatment between 2 groups:(196 ± 17) g/L vs. (182 ± 23) g/L and 0.606 ± 0.049 vs. 0.578 ± 0.066, P>0.05. The hemoglobin and HCT levels after treatment in observation group were significantly lower than those in control group:(153 ± 27) g/L vs. (168 ± 14) g/L and 0.490 ± 0.050 vs. 0.539 ± 0.054, and there were statistical differences (P<0.05). There was no obvious untoward reaction in 2 groups. Conclusions Erythrocyte separation is one of first choices for PV. It is safe and effective, and has less obvious untoward reaction.

Objective To explore a new approach to isolate the umbilical cord-mesenchymal stem cells (UC-MSCs) from a whole umbilical cord. Methods Single enzyme was used to digest the whole umbilical cord,and passaged and cultured,draw the growth curve,cell cycle and cell wall antigen on the surface by flow cytometry. In particular inducing system, the adherent cells were induced into adipocytes and osteoblast. Results The mesenchymal stem cells (MSCs) were derived from the whole umbilical cord. The growth curve showed that the cell doubling time was (24.15 ± 0.49) h and the percentage of G1phase cells was 82.66%.The adherent cells expressed the CD93,CD105,CD44,CD29and CD73, and did not express the CD34, CD45, CD31and human leukocyte antigen DR (HLA-DR). UC-MSCs could differentiate into adipocytes and osteoblast. Conclusions Single enzyme approach is a good method to obtain UC-MSCs from whole human umbilical cord,and it provides a theoretical basis for the establishment of MSCs bank and clinical application.

Thyroid B-ultrasound and urinary iodine content were examined in 4390 male workers aged 18-62 years-old,who participated annual physical checkups in 2009 and 2010.The results suggest that there is no obvious relationship between the urinary iodine which represents the iodine intake within 24 hours and prevalence of thyroidnodale.However,the prevalence of thyroid nodules shows an upward trend with the advance of age.

Objective: To prepare the monoclonal antibody against ankyrin repeat domain 22（ANKRD22）and to investigate its expression in colorectal cancer tissues. Methods : The recombinant human ANKRD22 was expressed through E. coli and pET-42a and then used to immunize Balb/c mice after purification. Anti-human ANKRD22 specific monoclonal antibodies were selected by Western blotting with 293T cell lysate highly expressing ANKRD22 as antigen. The expression of ANKRD22 in the tissue microarrays of 112 patients with colorectal cancer was detected by immunohistochemical staining. Results : Four specific monoclonal antibodies against human ANKRD22 were screened out of 93 hybridoma cells,which reacted well with natural human ANKRD22. ANKRD22 was mainly distributed in the cytoplasm of colorectal cancer cells. In 112 cases of colorectal cancer,94 cases were detected positive for ANKRD22 expression,with the positive rate of 83.93%. The expression of ANKRD22 was statistically correlated with the expression of p53 and β-catenin（P<0.05）,but not with age,sex,location of tumors,AJCC stage,Dukes stage,degree of differentiation,lymph node metastasis and mismatch repair gene expression（P>0.05）. Conclusion The expression level of ANKRD22 was high in colorectal cancer. ANKRD22 might be involved in the carcinogenesis of colorectal epithelium and be a potential diagnostic marker.

Through the literature collection on Chinese marine materia medica,this study analyzed medication rules of Chinese marine materia medica prescription,understood general conditions of Chinese marine materia medica prescription,in order to conduct data mining on medication rules of Chinese marine materia medica prescription.The name of Chinese marine materia medica was used as the search term.Chinese marine materia medica prescriptions were searched in related literatures of Chinese Medicine Code,Chinese Marine Materia Medica,Chinese Materia Medica,Chinese Pharmacopoeia and Great Dictionary of Chinese Medicine.The information was extracted and standardized to construct database for the initial data mining of related information and medication rules of Chinese marine materia medica prescriptions.The results showed that 16715 Chinese marine materia medica prescriptions were screened,which contained 144014 items of data,involving 218 kinds of Chinese marine materia medica.Decoction was the most common dosage form.The amount of Chinese marine materia medica prescription in the Ming and Qing dynasties was the largest.The highest frequency of Chinese marine materia medica in one prescription was 1 to 3 types.The prescription composed all by Chinese marine materia medica occupied 8.065％.Other prescriptions contained the compatibility of Chinese terrestrial materia medica.The prescription containing materia medica half from the sea and half from the land,occupied 7.754％.The Chinese marine materia medica used with the highest frequency in all prescriptions was oyster.The frequently used Chinese terrestrial materia medica was licorice and angelica in Chinese marine materia medica prescriptions.It was concluded that the number of Chinese marine materia medica prescription was large.Its compatibility and clinical application had a certain characteristic,which provided data foundation for the further research and development of Chinese marine materia medica.

Objective: To understand the current situation of the lack of knowledge about sexual and reproductive health among female college students, and to provide a reference for conducting feasible and effective interventions to improve their reproductive health. Methods: Female college students from a higher vocational college in Yantai were randomly sampled and questionnaires were conducted before and after the sexual and reproductive health education, 2 153 baseline questionnaires were obtained before intervention. After intervention for half a year, 2 110 valid questionnaires were obtained. Results: After the intervention, female college students’ awareness of normal menstrual cycle, menstrual days, menstrual health knowledge, female ovulation time, ovulation and menstruation significantly improved(P<0.01). The proportion of female college students taking an open attitudes of towards to premarital sex increased, and the number of contraceptives was significantly increased during premarital sex, and the rate reported with the intention of unwanted pregnancies to help parents, friends, and teachers was increased significantly, and the rate of choosing abortion in the illegal clinic decreased significantly (P<0.05). After intervention, students were concerned about contraceptive knowledge, STD prevention, and human flow harm. The cognition was significantly improved(P<0.01). Conclusion Reproductive health education for female college students can have a good effect and significantly increase the awareness rate of related knowledge.

Objective:To investigate the efficacy and safety of ixazomib-based therapy for multiple myeloma.Methods:The data of 32 patients with multiple myeloma treated with isazomib-based regimen in the Affiliated Hospital of Jining Medical University from December 2020 to December 2021 were retrospectively analyzed. Among 32 patients, 17 cases were relapsed/refractory, and the remaining 15 cases had initial treatment. The treatment regimens included ID (isazomib + dexamethasone), IRD (isazomib + lenalidomide + dexamethasone) and ICD (isazomib + cyclophosphamide + dexamethasone). The short-term curative effect and adverse reactions of relapsed/refractory patients and patients at initial onset were analyzed.Results:The overall response rate (ORR) of relapsed/refractory patients was 52.9% (9/17), of which 6 cases achieved complete remission (CR), 2 cases achieved very good partial remission (VGPR) and 1 case achieved partial remission (PR). The ORR of refractory patients receiving bortezomib therapy was 40.0% (4/10). The ORR of patients at initial onset who could be evaluated the curative effect was 100.0% (14/14), including 9 cases of CR, 2 cases of VGPR and 3 cases of PR. After treatment, 2 patients (6.2%) had grade Ⅲ-Ⅳ adverse events (1 case of herpes zoster and 1 case of thrombocytopenia), and none of the patients had grade Ⅲ-Ⅳ peripheral neuropathy.Conclusion:Isazomib is effective and safe in the treatment of initially treated and relapsed/refractory multiple myeloma.

Objective: To investigate the comorbidity of myopia and scoliosis among primary and secondary school students in Tianjin, and to analyze the school environment risk factors contributing to these health issues, so as to provide a scientific basis for development effective prevention measures. Methods: A total of 41 654 primary and secondary school students from 16 districts of Tianjin were selected by stratified random cluster sampling from September to October 2023 to screen for myopia and scoliosis. Univariate analysis was performed to examine the data, followed by a bivariate multivariate Logistic regression model and cumulative effect analysis to explore the influencing factors of their comorbidity. Results: In 2023, the prevalence of comorbidity of screening positive myopia and scoliosis among primary and secondary school students in Tianjin was 2.65%. The prevalence was higher in suburban areas (3.26%) compared to urban areas (2.02%), higher among females (3.81%) compared to males (1.59%), and highest in high school students (6.17%) compared to middle school (4.19%) and primary school students (0.44%) (χ2=62.23, 198.69, 953.19, P<0.01). Logistic regression analysis showed that the number of physical education classes ≥3 per week, the number of eye health exercises at school ≥2 per day, outdoor activities between classes, teachers reminding to pay attention to reading and writing posture and strict eye standing posture were negatively correlated with the comorbidity of screening positive myopia and scoliosis (OR=0.66, 0.77, 0.71, 0.78, 0.74, P<0.05). Reading or electronic screen while lying or lying on the stomach was positively associated with the comorbidity of screening positive myopia and scoliosis (OR=1.77, P<0.05). Cumulative effect analysis showed that the cumulative score (4-7, 7-9, ≥10) was negatively correlated with the comorbidity of screening positive of myopia and scoliosis (OR=0.65, 0.55, 0.52, P<0.05). Conclusions The school environment support and students personal behavior habits in school are related to the comorbidity of comorbidity of screening positive myopia and scoliosis. Prevention and control of myopia and scoliosis should improve the environmental factors related to students health in school.

Microsurgery techniques have allowed the development of many new therapeutic methods in plastic surgery, but are difficult to master without hard training. It is very important to set up a standardized microsurgery curriculum and training system for broadening surgical skills training and investigating the plastic surgery specialist training strategy. In our experiences, a series of training models are needed, like non-animal models, non- living animal models, live animal models and so on. This paper shows the training strategy for the primary stage of microsurgery training, non-animal model and non-living animal model training.

Microsurgery techniques have allowed the development of many new therapeutic methods in plastic surgery, but are difficult to master without hard training. It is very important to set up a standardized microsurgery curriculum and training system for broadening surgical skills training and investigating the plastic surgery specialist training strategy. In our experiences, a series of training models are needed, like non-animal models, non- living animal models, live animal models and so on. This paper shows the training strategy for the primary stage of microsurgery training, non-animal model and non-living animal model training.