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BACKGROUND:Knee osteoarthritis is a common clinical degenerative joint disease characterized by chronic inflammation and oxidative stress.Resveratrol has anti-inflammatory and anti-oxidative stress biological effects,and therefore it can be used symptomatically and expected to provide a new strategy for the treatment of knee osteoarthritis. OBJECTIVE:To investigate the therapeutic effect and mechanism of resveratrol on knee osteoarthritis in rats through the silence information regulator 1(SIRT1)/forkhead transcription factor O1(FOXO1)pathway. METHODS:Forty Sprague-Dawley rats were randomly divided into control group,model group,low-dose resveratrol group,and high-dose resveratrol group,with 10 rats in each group.Knee osteoarthritis models were established in the model group,low-dose resveratrol group,and high-dose resveratrol group.A mixture of 4%papain solution and 0.3 mol/L cysteine solution(1:1 for 0.5 hours;20 μL)was injected at 1,4,and 7 days after modeling.Rats in the low-dose and high-dose resveratrol groups were injected with 25 and 100 mg/kg resveratrol through the articular cavity at 1 day after successful modeling,while those in the control and model groups were injected with equivalent volume of physiological saline through the articular cavity.After 28 days of treatment,the maximum knee joint activity was measured;the levels of oxidative stress indicators and inflammatory factors in the synovial fluid of the knee joint were analyzed by radioimmunoassay and ELISA;the content of collagen fibers in the knee joint was analyzed by safranin O-fast green staining;the degree of arthritic lesions was analyzed using the Mankin histological score;and the levels of SIRT1 and FOXO1 in the knee joint were detected by western blot assay. RESULTS AND CONCLUSION:Compared with the model group,the maximum knee flexion and extension angles of rats significantly increased in the low-dose and high-dose resveratrol groups,and were significantly higher in the high-dose group than the low-dose group(P<0.05).Compared with the model group,the levels of superoxide dismutase and glutathione peroxidase in the knee joint fluid of rats significantly increased in the low-dose and high-dose resveratrol groups.The level of malondialdehyde significantly decreased in both resveratrol groups,and the level in the high-dose resveratrol group was significantly better than that in the low-dose resveratrol group(P<0.05).Compared with the model group,the low-dose and high-dose resveratrol groups showed a significant decrease in the levels of interleukin 1β,interleukin 6 and tumor necrosis factor α in the knee joint fluid of rats,and the levels of these inflammatory factors were significantly lower in the high-dose resveratrol group than the low-dose resveratrol group(P<0.05).Compared with the model group,the content of collagen fibers in the knee joint was significantly increased in both resveratrol groups,and the high-dose resveratrol group showed a higher content of collagen fibers than the low-dose resveratrol group(P<0.05).Compared with the model group,the expression level of SIRT1 in the knee joints of rats significantly increased in both resveratrol groups,while the level of acetylated FOXO1 significantly decreased(P<0.05).The magnitude of changes was significantly better in the high-dose group than the low-dose group.To conclude,resveratrol significantly improves the levels of oxidative stress and inflammatory factors in the joint fluid of rats with knee osteoarthritis and alleviates arthritic symptoms in a dose-dependent manner,possibly through the SIRT1/FOXO1 pathway.

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Objective:To study the effect of excessive torsion of the umbilical cord on fetal or neonatal outcomes.Methods:The observation group was selected from the puerperae who delivered in Beijing Obstetrics and Gynecology Hospital from July 2016 to June 2020 with excessive torsion of the umbilical cord. In the same period, the puerperae without excessive torsion of the umbilical cord were selected as the control group with a ratio of 1∶1. The general condition, mode of delivery, perinatal outcomes, and the effect of different umbilical coiling index (UCI) [twisted umbilical cord weeks/umbilical cord length (cm)] on fetal and neonatal outcomes were retrospectively analyzed between two groups.Results:Compared with the control group, the observation group (1 780 cases) had smaller neonatal gestational age [(37.9±3.2) weeks vs. (38.4±2.9) weeks], birth weight [(3 007±726) g vs. (3 354±616) g] and length [(48.5±4.3) cm vs. (49.6±4.1) cm], but higher incidence of fetal distress [34.9% (622/1 780) vs. 12.9% (230/1 780)], neonatal asphyxia [1.5% (26/1 780) vs. 0.7% (13/1 780)], and cord blood pH<7.20 [4.2% (75/1 780) vs. 2.8% (49/1 780)], the difference was statistically significant ( P<0.05). The UCI≥0.73 group had lower neonatal gestational age, birth weight and length, but higher incidence of cord blood pH<7.20 and neonatal asphyxia than the UCI<0.73 group, with statistically significant differences ( P<0.05). Conclusions:Excessive torsion of the umbilical cord increases the incidence of fetal hypoxia and neonatal asphyxia and has a significant effect on neonatal gestational age, birth weight and length. The higher the UCI, the greater the impact on fetus and neonate.

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INTRODUCTION@#Pregnant women are reported to be at increased risk of severe coronavirus disease 2019 (COVID-19) due to underlying immunosuppression during pregnancy. However, the clinical course of COVID-19 in pregnancy and risk of vertical and horizontal transmission remain relatively unknown. We aim to describe and evaluate outcomes in pregnant women with COVID-19 in Singapore.@*METHODS@#Prospective observational study of 16 pregnant patients admitted for COVID-19 to 4 tertiary hospitals in Singapore. Outcomes included severe disease, pregnancy loss, and vertical and horizontal transmission.@*RESULTS@#Of the 16 patients, 37.5%, 43.8% and 18.7% were infected in the first, second and third trimesters, respectively. Two gravidas aged ≥35 years (12.5%) developed severe pneumonia; one patient (body mass index 32.9kg/m2) required transfer to intensive care. The median duration of acute infection was 19 days; one patient remained reverse transcription polymerase chain reaction (RT-PCR) positive >11 weeks from diagnosis. There were no maternal mortalities. Five pregnancies produced term live-births while 2 spontaneous miscarriages occurred at 11 and 23 weeks. RT-PCR of breast milk and maternal and neonatal samples taken at birth were negative; placenta and cord histology showed non-specific inflammation; and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-specific immunoglobulins were elevated in paired maternal and umbilical cord blood (n=5).@*CONCLUSION@#The majority of COVID-19 infected pregnant women had mild disease and only 2 women with risk factors (obesity, older age) had severe infection; this represents a slightly higher incidence than observed in age-matched non-pregnant women. Among the women who delivered, there was no definitive evidence of mother-to-child transmission via breast milk or placenta.

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Adulto , Femenino , Humanos , Embarazo , Adulto Joven , Aborto Espontáneo/epidemiología , COVID-19/transmisión , Prueba de Ácido Nucleico para COVID-19 , Prueba Serológica para COVID-19 , Estudios de Cohortes , Transmisión de Enfermedad Infecciosa/estadística & datos numéricos , Sangre Fetal/inmunología , Transmisión Vertical de Enfermedad Infecciosa/estadística & datos numéricos , Nacimiento Vivo/epidemiología , Edad Materna , Leche Humana/virología , Obesidad Materna/epidemiología , Placenta/patología , Complicaciones Infecciosas del Embarazo/fisiopatología , Resultado del Embarazo/epidemiología , Primer Trimestre del Embarazo , Segundo Trimestre del Embarazo , Estudios Prospectivos , ARN Viral/análisis , Factores de Riesgo , SARS-CoV-2 , Índice de Severidad de la Enfermedad , Singapur/epidemiología , Cordón Umbilical/patología

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INTRODUCTION@#To describe the maternal and fetal outcomes in systemic lupus erythematosus (SLE) pregnancies followed-up in a single tertiary referral centre.@*METHODS@#We performed a retrospective cohort study of 75 SLE pregnancies who were followed up in Singapore General Hospital over a 16-year period from 2000 to 2016. Adverse fetal and maternal outcomes including preterm delivery, miscarriages, fetal growth restriction, congenital heart block, neonatal lupus, pre-eclampsia and SLE flares were obtained from the medical records.@*RESULTS@#The mean age at conception was 32 years old (SD 3.8). The mean SLE disease duration was 5.9 years (SD 5.2). The majority (88%) had quiescent SLE disease activity at baseline. Most pregnancies resulted in a live birth (74.7%). The mean gestational age at birth was 37.4 weeks (SD 3.4). Adverse fetal outcomes occurred in 53.3%. Preterm delivery (33.9%), miscarriages (20%) and fetal growth restriction (17.3%) were the most frequent adverse fetal outcomes. There was 1 neonatal death and SLE flares occurred in a third (33%). In the subgroup of SLE pregnancies with antiphospholipid syndrome, there were higher SLE flare rates (40%) and adverse fetal outcomes occurred in 8 pregnancies (80%). There were no predictive factors identified for all adverse fetal and maternal outcomes. In the subgroup analysis of preterm delivery, anti-Ro (SS-A) antibody positivity and hydroxychloroquine treatment were associated with a lower risk of preterm delivery.@*CONCLUSION@#Although the majority had quiescent SLE disease activity at baseline, SLE pregnancies were associated with high rates of adverse fetal and maternal outcomes.

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Myelocytomatosis (MYC) transcription factors (TFs) are key regulators of the jasmonic acid (JA) signaling pathway. In cell cultures, methyl jasmonate (MeJA) can improve the production of taxol, which is a complex terpenoid compound with an intense antitumor activity. However, the functions of MYC genes in Taxus sp. (yew trees) remain poorly known. Based on Taxus sp. transcriptome changes induced by MeJA, a TcMYC gene was isolated in a previous study. Here, we further characterized the TcMYC TF encoded by that gene and four other yew MYC TFs previously obtained. Three yew MYC TFs had the typical basic helix-loop-helix (bHLH)-MYC_N region, but the other two MYC did not, although all five presented the bHLH domain. TcMYC was localized to the nuclei, and phylogenetic analysis indicated that the yew MYC TFs were closely related to Arabidopsis thaliana MYC1/2 and maize R protein. The yeast one-hybrid assay showed that TcMYC binds the G-box of the promoter of taxane 5α-hydroxylase. Transcript levels of TcMYC revealed that TcMYC was highly expressed in xylem and leaves, and up-regulated by drought and high-salinity stresses. Coronatine (COR) has recently been used as a new elicitor to improve the production of taxol in cell cultures; TcMYC was strongly expressed at 2 and 4 h after COR treatment, but decreased at 12 and 24 h. Overall, the results obtained here provide new insights into the potential regulatory roles of MYC TFs on taxol biosynthesis in yew trees.

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Genes myc , Taxus/genética , Acetatos/farmacología , Clonación Molecular , Ciclopentanos/metabolismo , Ciclopentanos/farmacología , Regulación de la Expresión Génica de las Plantas/efectos de los fármacos , Genes de Plantas/efectos de los fármacos , Genes myc/genética , Redes y Vías Metabólicas/efectos de los fármacos , Redes y Vías Metabólicas/genética , Oxilipinas/metabolismo , Oxilipinas/farmacología , Filogenia , Factores de Transcripción/genética , Transcriptoma/efectos de los fármacos

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MicroRNAs (miRNAs) play vital roles in diverse biological processes, including in immune response. Blunt snout bream (Megalobrama amblycephala) is a prevalent and important commercial endemic freshwater fish species in China's intensive polyculture systems. To identify immune-related miRNAs of M. amblycephala, two small RNA (sRNA) libraries from immune tissues with or without lipopolysaccharide (LPS) stimulation were constructed and sequenced using the high-throughput sequencing technology. Totally, 16,425,543 and 15,076,813 raw reads, corresponding to 14,156,755 and 13,445,869 clean reads, were obtained in the normal and infected libraries, respectively. A total of 324 miRNAs, including 218 known miRNAs and 106 putative novel miRNAs were identified by bioinformatic analysis. We analyzed differentially expressed miRNAs between two libraries using pairwise comparison. 113 (34.88%) miRNAs were found to be significantly differentially expressed between two libraries, with 63 (55.75%) exhibiting elevated expression in LPS stimulation sample. Thereinto, a number of known miRNAs were identified immune-related. Real-time quantitative PCR (RT-qPCR) were implemented for 12 miRNAs of two samples, and agreement was confirmed between the sequencing and RT-qPCR data. Target genes likely regulated by these differentially expressed miRNAs were predicted using computational prediction. The functional annotation of target genes by Gene Ontology enrichment (GO) and Kyoto Encyclopedia of Genes and Genomes pathway analysis (KEGG) indicated that a majority of differential miRNAs might involved in immune response. To our knowledge, this is the first comprehensive study of miRNAs in response to LPS stimulation in M. amblycephala, even in fish. These results deepened our understanding of the role of miRNAs in the intricate host's immune system, and should be useful to develop new control strategies for host immune defense against various bacterial invasions in M. amblycephala.

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Cyprinidae/genética , Cyprinidae/inmunología , Sistema Inmunológico , MicroARNs/genética , MicroARNs/inmunología , Animales , Biología Computacional , Cyprinidae/metabolismo , Biblioteca de Genes , Sistema Inmunológico/inmunología , Reacción en Cadena en Tiempo Real de la Polimerasa/veterinaria , Análisis de Secuencia de ARN/veterinaria

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Objective To implement a two?level community?based health education pattern of schistosomiasis in residents of endemic areas in marshland and lake regions,so as to explore the suitable pattern of health education under hypo?endemic situa?tion. Methods Two schistosomiasis endemic villages in Jiangling County,Hubei Province were collected as study areas,and among which,one village was treated as an intervention group,where the two?level community?based health education pattern as well as regular control measures was implemented;the other village was a control group,where only regular control measures were implemented. The awareness rates on schistosomiasis control,the rates of correct behavior and the compliance rates of ex?amination,treatment and chemotherapy of the two groups before and after the intervention were compared. Results According to the results of the baseline survey in 2014,the awareness rates of schistosomiasis control of the intervention and control groups were 84.00%and 77.45%,respectively,the correct rates of behavior of the two groups were 72.00%and 63.73%,respectively, and the compliance rates of the treatment were 80.36%and 82.28%,respectively,there were no statistically significant differ? ences between all the above rates of the two groups(all P>0.05). After the intervention of the two?level community?based health education,the correct rates of behavior,and the compliance rates of examination and chemotherapy of the two groups were 92.31%and 80.37%,95.11%and 82.55%,84.13%and 63.64%,respectively,and the differences between all the rates above of the two groups were statistically significant(all P<0.05). When compared to those before intervention,the growing rates of the compliance rates of examination,treatment and chemotherapy of the intervention group were 20.97%,15.33%and 23.29%, respectively,while those of control group were 14.27%,4.17%,-3.77%,respectively,the growing rates of the intervention groups were higher than those of the control groups. Conclusions Through the two?level community?based pattern of health edu?cation,the compliance rates of examination and treatment of the residents have improved,and therefore,the pattern is suitable for popularization and application in marshland and lake regions.

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An autopsy case of sudden death induced by alimentary tract hemorrhage was presented, which was caused by the unexpected rupture of clinically unrecognized tuberculous abdominal aortic a-neurysm (TAAA). The initial diagnosis was made of the syndrome of coronary heart disease and hyper-tensive disease. The detailed autopsy showed that the alimentary tract hemorrhage was caused by a sud-den rupture of the mass after posture changing was ascertained as the cause of death. The diagnosis of TAAA was determined by the autopsy findings. Analysis for the medical dispute of TAAA was de-scribed, and the difficulty of the diagnosis and medico-legal implications were also discussed.

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Cervical stenosis is a challenging condition that often recurs despite intervention. Multiple therapeutic options have been described, but a clearly effective and reliable treatment method has yet to be identified. Patients with recurrent stenosis are at risk of developing severe complications such as chronic pelvic pain and infertility. We describe a case of congenital cervical stenosis with secondary haematometra in which repeated cervical dilatation, hysteroscopic canalisation and administration of medications to retard endometrial development were unsuccessful in relieving the obstruction and preventing re-accumulation of menstrual blood. Total hysterectomy was eventually mandated by spontaneous rupture of the haematometra.

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Adulto , Femenino , Humanos , Constricción Patológica , Diagnóstico , Endometrio , Patología , Hematómetra , Diagnóstico por Imagen , Cirugía General , Infertilidad , Dolor Pélvico , Recurrencia , Riesgo , Rotura Espontánea , Tomografía Computarizada por Rayos X , Enfermedades del Cuello del Útero , Diagnóstico , Enfermedades Uterinas , Diagnóstico , Hemorragia Uterina , Diagnóstico , Rotura Uterina , Diagnóstico por Imagen , Cirugía General

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Objective To investigate the roles of glutamate signaling pathway in the activation of human peripheral blood lymphocytes(PBLs) and pathogenesis of vitiligo.Methods Peripheral blood lymphocytes (PBLs) isolated from 5 patients with generalized vitiligo and 5 healthy controls were cultured in vitro.Flow cytometry was performed to quantify the expression of CD25 and interferon-γ on PBLs derived from healthy controls and treated with MK801 (a non-competitive antagonist of N-methyl-D-aspartic acid receptor,NMDAR) at 100 μmol/L or phosphate buffered saline (PBS) for 48 hours,as well as the level of reactive oxygen species (ROS) in the controlderived PBLs treated with MK801 at 100 μmol/L,NMDA (an agonist of N-methyl-D-aspartic acid receptor) at 0.5 mmol/L or PBS for 48 hours.The protein and mRNA expressions of NMDAR1 and NMDAR2A were measured by flow cytometry and real-time PCR,respectively,in PBLs from the healthy controls and vitiligo patients.Immunohistochemistry was used to observe the expressions of NMDAR1 and NMDAR2A in tissue specimens from depigmented and postinflammatory hyperpigmentation lesions of the patients with vitiligo and from normal skin of the healthy controls.Results Compared with the PBS-treated PBLs from the healthy controls,the MK801-treated PBLs showed a downregulated expression of CD25 (7.28％ ± 0.18％ vs.16.02％ ± 0.42％,P ＜ 0.01),but an upregulated proportion of CD25+IFN-γ+ lymphocytes (1.79％ ± 0.09％ vs.0.78％ ± 0.06％,P ＜ 0.01),and the NMDA-treated PBLs displayed a higher ROS level (101.1 ± 3.50 vs.69.80 ± 2.08,P＜ 0.01 ).The protein expression of NMDAR1 in PBLs was significantly higher in vitiligo patients than in the healthy controls (3.85 ± 2.17 vs.0.97 ±0.55,P ＜ 0.05).Conclusion Glutamate signaling pathway may be involved in the immunopathogenesis of vitiligo via affecting the secretion of interferon-γ by,and ROS level in,activated lymphocytes.

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Ventilator-associated pneumonia is a complication of mechanical ventilation and also important types of nosocomial infection. With the extensive use of ventilators, neonatal ventilator-associated pneumonia in a growing trend severely affected the success rate of the critically ill neonates, which has become a neonatal ventilator dependence and major cause of death. Taking reasonable and timely diagnosis and treatment is an urgent issue. This article focuses on the current diagnosis and treatment of ventilator-associated pneumonia in progress,especially in the diagnosis of etiology and treatment.

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<p><b>OBJECTIVE</b>To study the morphological variations of Paris polyphylla var. yunnansensis in different population for genetic diversity and breeding.</p><p><b>METHOD</b>The characters of roots, stalks, leave and flowers were observed. The results were analyzed by DPS software.</p><p><b>RESULT AND CONCLUSION</b>P. polyphylla var. yunnansensis showed plenty genetic diversity, there existed obvious differences in morphological characters of different population. Principal components analysis showed that the number of calyces, petal, carpels, stamens is main factor,which causes the morphological variations in different population. Cluster analysis shows that 26 populations are incorporates in two types as 45.08 Euclidean distance. Leaf area index is distinct different in this two types.</p>

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China , Variación Genética , Liliaceae , Clasificación , Genética

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<p><b>OBJECTIVE</b>To evaluate the effects of early tangential excision on the prevention of the progression of deep partial thickness burn wound.</p><p><b>METHODS</b>Twelve burn patients with deep partial thickness burn wound were enrolled and received tangential excision of the burn wound within 24 postburn hours (PBHs). The histological samples were harvested from the wound before and 5 - 7 postoperative days (PODs) after the operation and the wound without operation 5 - 7 postburn days (PBDs). The samples were observed by means of HE staining, Masson's staining and the labelling of Vimentin antigen positive cells by immunohistological skill.</p><p><b>RESULTS</b>The inflammatory reaction of the burn wound without operation aggravated progressively along with that of disease and the tissue necrosis area enlarged. And the residual skin appendages disappeared due to the enhanced inflammatory reaction. The brown area expanded and light green area shrinked by Masson's staining. The Vimentin antigen positive cell count decreased significantly. But in the burn wound being performed tangential excision within 24 PBHs, focal inflammatory reaction exhibited evident ligher than that in burn wound without operation. Moreover, there appeared fresh granulation formation and partial epithelial coverage with no enlarged necrotic tissue area in the operated wound when compared with that in non-operated wound (P < 0.05). Furthermore, the light green area exhibited no obvious shrinking by Masson's staining and the Vimentin antigen positive cell count was much more in the operation area than that in non-operative area (P < 0.05).</p><p><b>CONCLUSION</b>It might be beneficial to the host to perform tangential excision within 24 PBHs, which could remove burn wound necrotic tissue in time and hamper the progression of tissue degenerative injury. The healing process of deep partial thickness burn wound was therefore accelerated.</p>

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Adulto , Femenino , Humanos , Masculino , Quemaduras , Metabolismo , Patología , Necrosis , Vimentina , Cicatrización de Heridas

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OBJECTIVE:To investigate how to develop pharmaceutical care in the hospital of university.METHODS:Through studying and comparing the pharmaceutical care in large and medium-sized hospitals,suggestions on the pharmaceutical care in the hospital of university were put forward.RESULTS & CONCLUSION:By drawing experience form large and medium-sized hospitals,the hospital of university can develop multiple items of pharmaceutical care in accordance with its own characteristics.

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On the basis of host reactions and serology, six Chinese peanut stunt virus (PSV) strains were found to be distinct from PSV-E and PSV-W, two type strains representing distinct serological subgroups. Chinese PSV strains were characterized by infecting Chenopodium amaranticolor and C. quinoa systemically. All Chinese strains were serologically closely related to each other, but distinct from PSV-E and more distant from PSV-W. Using two PSV-specific primers designed from conserved regions of the PSV RNA3 nucleotide sequence, cDNA transcribed from RNA3 of two Chinese PSV strains, Mi and S, was amplified by PCR and cloned. The sequenced cDNA of the two PSV strains included 654 nt of the coat protein (CP) gene. The identity of the CP gene nucleotide sequence between PSV-Mi and PSV-S was 99.0%, with 99.5% amino acid identity. Identity of the CP gene nucleotide sequence was 75.6 to 77.8% between PSV-Mi and -S (the two Chinese strains) and PSV-ER and -J in PSV subgroup I; and 74.1 to 74.4% between PSV-Mi and -S, and PSV-W in subgroup II. Based on these results, we propose placing PSV Chinese strains into a new PSV subgroup III.

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In order to study the new function of riboflavin, the experiments of ri-boflavin on the prevention of teratogenesis were conducted. The experimental rats were divided into four groups A,B,C,D. A served as a control group, B,C,D, were given 50?g, 250ng and 1000?g of riboflavin respectively for one week intragastrically prior to the study. After pregnancy, all rats including controls were given teratogenic pesticide Dikushuang 0.75mg/kgbw for contaminaton intragastrically, riboflavin being given continually as before, to observe the effects on body weight growth and hemoglobin level of pregnant rats. The following parameters were measured: the reproduction of pregnant rats, the development of fetus and the teratogenic activity of fetus after animals were killed. The experimental results showed that the average body weight gain in the each dose groups of riboflavin were higher than the control group, but the difference was not significant. The hemoglobin levels at various experimental times were less significant among the groups.The rates of the resorption and the living fetus in 250?g and 1000?g groups were significantly lower than the control (P