Under indoors simulating natural growing condition, the 4th-instar Mythimna separata larvae were fed by using poi- son leaf disk method. The effect of total ginsenosides on the protective enzymes (PPO, T-SOD, CAT and POD) of M. separata larvae was studied. The total ginsenosides could influence the protective enzymes of 4th-instar M. separata larvae significantly. After treated by total ginsenosides, the PPO activities increased firstly then decreased, and tended to equilibrium, and reached the maximum after 48 h. Furthermore, the total ginsenosides disturbed the dynamic balance of SOD, CAT and POD of M. separata larvae, and the yield of O2-* speeded. The results suggest that the total ginsenosides influence the protective enzymes of 4th-instar M. separata larvae, and disturb the original dynamic balance of protective enzymes. Consequently the insect suffers from the harm of O2-*.
Animals ; Enzymes ; metabolism ; Ginsenosides ; metabolism ; Larva ; metabolism ; Lepidoptera ; metabolism ; Oxygen ; metabolism

This paper is in order to study the anti-feeding and growth inhibition activity of toatal ginsenoside of ginseng stems and leaves against 4th-instar Mythimna separata larvae. Simulating natural growing condition indoors, on the base, To study the anti-feeding and growth inhibition activity of toatal ginsenoside against 4th-instar M. separata larvae by leaf disc test. The toatal ginsenoside appeared to be of significant antifeeding activity against 4th-instar M. separata larvae. The 4th-instar M. separata larvae fed on the leaves of Sorghum bicolor treated with 20, 10, 5 g · L(-1) toatal ginsenoside. At 8 h, non-selective anti-feeding rate were 88.67%, 64.40% and 47.36%, and selective anti-feeding rate were 62.49% , 44.29% and 34.19%; Compared with the photographic, The toatal ginsenoside conld make the development period had prolonged 13h in treated group. The toatal ginsenoside had significant inhibition effect on feeding and growth and development against 4th-instar M. separata larvae, and inhibition effect increases as the increase of concentration ginsenoside.
Animals ; Ginsenosides ; pharmacology ; Insecticides ; pharmacology ; Larva ; Moths ; growth & development ; Panax ; chemistry

OBJECTIVETo analyze the degrees on the epidemic foci of Angiostronglus cantonensis and to explore the measurement methods.

METHODSSnails (Pila gigas) were collected from the spots of Wenzhou, Cangnan, Yongjia, Yueqing in Zhejiang province and Minhou, Changle, Ningde in Fujian province. The snails were examined microscopically in order to calculate their infection rates and the average worm number in the positive snails, then taking the product of multiplication of both values as infestation index.

RESULTSThe infection rates of the epidemic foci were 10.59% (9/85), 60.74% (181/298), 34.96% (79/226), 32.90% (76/231), 57.50% (184/320), 40.00% (82/205), 17.65% (12/68) and the rates of infectivity were 6.57, 183.54, 121.73, 93.45, 276.36, 76.08, 12.65, respectively.

CONCLUSIONThe epidemic foci were divided into five ranks (super, high, mid-range, low and non-epidemic foci) according to the value of infestation index which ranked from > 75, 30-75, 5-29, < 5 to 0.

Angiostrongylus ; pathogenicity ; Animals ; China ; Disease Outbreaks ; Snails ; parasitology ; Strongylida Infections ; epidemiology

OBJECTIVEThis study aims to reveal the effect of total ginsenoside on the protein content and digestive enzyme activities of 4th-instar Mythimna separata larvae, including alpha-amylase and cellulose, and explore the ecological function of total ginsenoside.

METHODWhile simulating natural growing condition indoors, 4th-instar M. separata larvae were fed by poison leaf disk method. The protein content was tested by Lowry Protein Assay Kit method, the activity of alpha-amylase was measured by dinitrosalicylic acid test, and the activity of cellulase was determined by the filter paper method.

RESULTThe total ginsenoside could reduce the content of protein of 4th-instar M. separata larvae significantly, and the activity of digestive enzyme, including alpha-amylase and cellulase. The protein content, alpha-amylase and cellulase activity of treatments were obviously lower than that of the control. Inhibition ratio of alpha-amylase and cellulase activity was positively correlated with total ginsenoside concentration: i. e. 20 g x L(-1) > 10 g x L(-1) > 5 g x L(-1).

CONCLUSIONThe results suggest that the inhibition effect of total ginsenoside on protein content and digestive enzymes may be one of the causes to antifeedant and dysplasia of M. separata larvae.

Animals ; Digestion ; Ginsenosides ; pharmacology ; Insect Proteins ; metabolism ; Larva ; drug effects ; enzymology ; growth & development ; Moths ; drug effects ; enzymology ; growth & development

OBJECTIVETo study the anti-feeding effect of total ginsenoside of ginseng stems and leaves on Heliothis dipsacea larvae.

METHODThe natural growing condition for lavae was simulated indoors. The anti-feeding effect of total ginsenoside on Heliothis dipsacea larvae was studied by leaf disc test.

RESULTThe total ginsenoside appeared showed a significant antifeeding effect. The Heliothis dipsacea larvae fed with the leaves of soybean treated with 2.0%, 1.0% and 0.5% total ginsenoside, respectively. At 8 h, non-selective anti-feeding rate were 93.40%, 83.42% and 75.19%, and selective anti-feeding rate were 77.53% , 73.58% and 58.86%.

CONCLUSIONThe toatal ginsenoside had significant inhibition effect on Heliothis dipsacea larvae, and inhibition effect increases as the increase of concentration ginsenoside.

Animals ; Feeding Behavior ; drug effects ; Ginsenosides ; pharmacology ; Larva ; drug effects ; growth & development ; physiology ; Moths ; drug effects ; growth & development ; physiology ; Panax ; chemistry ; Plant Extracts ; pharmacology ; Plant Leaves ; chemistry ; Plant Stems ; chemistry

Aim To investigate the effects and possible molecular mechanisms of dioscin(DIO)against depression in mice.Methods Eighty mice were randomly divided into control group, DIO control group, model group, DIO groups(20, 40 and 80 mg·kg-1 DIO)and FLU group(20 mg·kg-1 fluoxetine).After establishing the depression model with chronic unpredictable moderate stress(CUMS)in mice, the corresponding drugs were administered by gavage continuously for four weeks in each group.The behavior of mice was tested, and the contents of corticosterone(CORT), brain-derived neurotrophic factor(BDNF), 5-hydroxytryptamine(5-HT), malondialdehyde(MDA), superoxide dismutase(SOD)and catalase(CAT)were evaluated by ELISA or enzyme labeling method.In addition, HE staining, Nissl staining and PET scanning were operated for the brain tissues.Western blot was used to detect the protein expressions.Results Compared with model group, DIO significantly improved the behaviors of depressed mice.And it reduced the contents of CORT in serum, increased BDNF and 5-HT in hippocampus.Meanwhile, DIO obviously reduced MDA in serum, increased SOD in serum and CAT in brain tissues.DIO improved the steatosis of brain tissues, disorder and looseness of neurons, and increased glucose metabolism in brain tissues of depressed mice.The molecular mechanism suggested that compared with model group, DIO significantly increased the protein level of UCP2 to adjust the levels of Nrf2, SOD2, GLUT1 and G6Pase.Conclusions DIO improves the depression symptoms of depressed mice, which should be through adjusting UCP2-mediated oxidative stress and glucose metabolism.

OBJECTIVETo investigate bone defect healing by true bone ceramic complex carrying core binding factor a1 (Cbfa1) gene modified rabbit skin fibroblasts.

METHODSTransfect rabbit skin fibroblasts (RSF) with both eukaryotic expression vector pSG5 which could express Cbfa1 gene and pSG5. After being cultured for 48 h, the transfected RSF were seeded into true bone ceramic (TBC) of 2 cm in length and 4 mm in diameter to construct pSG5-Cbfa1/RSF/TBC complex and pSG5/RSF/TBC complex. Forty-eight bone defect model rabbits were randomized into four groups, each has 6 rabbits (12 radius), due to different treatment. group I: with pSG5-Cbfa1/RSF/TBC complex, group II: with pSG5/RSF/TBC complex, group III: with TBC, Group IV: empty control. After being seeded and cultured for about 24 h the complexes were implanted into 2 cm long bone defects in the middle of bilateral radius of rabbits. The radius were inspected by X-ray and then the specimens were collected at the end of the fourth and twelfth weeks after operation. Then, the specimens were decalcified and histologically investigated with Hematoxylin eosin staining and Masson staining methods. Newly synthesized trabecular bone was inspected by image analysis system and the strength of bone defect area treated with graft-implantation was tested with biomechanical method-three point bending test.

RESULTSIn group I, trabecular bone was actively synthesized to generate a great amount of trabecular bone and osteon. Preliminary union and bone defect healing were completed with good biomechanical characteristics. There were no newly synthesized trabecular in the other three groups, and bone defect healing were not discovered. The amount of newly synthesized trabecular bone and the results of biomechanical testing differed significantly between group I and the other three (P < 0.01). The efficacy of group I was significantly better than that of the other three groups.

CONCLUSIONTrue bone ceramic complex composed with Cbfa1 gene modified rabbit skin fibroblasts can effectively heal bone defect in rabbits.

Animals ; Bone Regeneration ; Bone Substitutes ; Bone Transplantation ; Cells, Cultured ; Core Binding Factor Alpha 1 Subunit ; genetics ; Disease Models, Animal ; Fibroblasts ; cytology ; metabolism ; Plasmids ; genetics ; Rabbits ; Radius ; injuries ; physiopathology ; surgery ; Random Allocation ; Skin ; cytology ; Tissue Engineering ; methods ; Transfection

Objective: To investigate the effect of 1q21 amplification (1q) on the therapeutic response and prognosis of bortezomib(Btz) in the treatment of newly diagnosed multiple myeloma (MM) patients. Methods: A total of 180 newly diagnosed MM were included for analyses of clinical characteristics, cytogenetics, objective response rate (ORR), progression-free survival (PFS) and overall survival (OS), retrospectively. Gene expression profiling (GEP) was analyzed using publicly available R2 platform. Results: ① In 180 patients, 1q was found in 51.1% cases. Of them, 174 patients had complete follow-up data, including 88 cases with 1q and 86 without 1q (non-1q). ②Incidence of 1q was positively associated with percentage of IGH rearrangement (72.2%, P=0.017) and 1p deletion (1p) (27.8%, P=0.040). ③ The median PFS was 15.0 and 20.3 months for the 1q group and non-1q group, and the median OS was 29.4 and 44.0 months, respectively. Both PFS and OS of 1q group was significantly shorter than those of the non-1q group (P=0.029 and 0.038, respectively). Multivariate analysis further revealed that 1q was an independent prognostic factor for both PFS (HR=1.910, 95% CI 1.105-3.303, P=0.020) and OS (HR=2.353, 95% CI 1.090-5.078, P=0.029). ④ In 91 evaluable cases with 1q, very good partial remission (VGPR) rate was higher after treatment with Btz than those without Btz (62.1% vs 40.0%, P=0.032). Of note, the patients with 1q who received auto-HSCT after induction with Btz had significantly longer PFS than those without auto-HSCT (19 months vs 13 months, P=0.048). ⑤GEP analysis revealed that 1q21 amplification predominantly up-regulated expression of >50% genes within 1q21 region, and also altered expression of 28% genes in chromosome 1 and 10% genes in whole genome, particularly related to DNA repair and cell cycle. Conclusions: 1q is an independent adverse prognostic factor in patients with newly diagnosed MM. It is often associated with 1p deletion and IGH rearrangement. Patients with 1q respond well to Btz-based regimen, but they fail to gain long-term benefit from this treatment itself. However, auto-HSCT following Btz induction might improve survival of patients with 1q, suggesting a potential strategy to treat this high-risk subset of MM. GEP analysis warrants further attention in understanding the mechanisms underlying the high-risk of 1q.
Bortezomib/therapeutic use* ; Chromosome Aberrations ; Humans ; Multiple Myeloma/drug therapy* ; Prognosis ; Retrospective Studies

This case presents vertical root fracture with vital pulp in mandibular right first molar. Examinations of the history, clinical tests, laser Doppler flowmetry, and radiographs revealed that the tooth showed positive response to electric pulp testing and was normal compared with the healthy control tooth. This study aimed to use a novel vital preserving surgical technique (microapical surgery and nanometer bioactive materials) to make an effective therapeutic decision for the vital tooth with vertical root fracture.
Dental Pulp ; Humans ; Molar ; Tooth Fractures ; Tooth Root

OBJECTIVE: Exposure to high intensity, low frequency noise (HI-LFN) causes vibroacoustic disease (VAD), with memory deficit as a primary non-auditory symptomatic effect of VAD. However, the underlying mechanism of the memory deficit is unknown. This study aimed to characterize potential mechanisms involving morphological changes of neurons and nerve fibers in the hippocampus, after exposure to HI-LFN. METHODS: Adult wild-type and transient receptor potential vanilloid subtype 4 knockout (TRPV4^-/-) mice were used for construction of the HI-LFN injury model. The new object recognition task and the Morris water maze test were used to measure the memory of these animals. Hemoxylin and eosin and immunofluorescence staining were used to examine morphological changes of the hippocampus after exposure to HI-LFN. RESULTS: The expression of TRPV4 was significantly upregulated in the hippocampus after HI-LFN exposure. Furthermore, memory deficits correlated with lower densities of neurons and neurofilament-positive nerve fibers in the cornu ammonis 1 (CA1) and dentate gyrus (DG) hippocampal areas in wild-type mice. However, TRPV4^-/- mice showed better performance in memory tests and more integrated neurofilament-positive nerve fibers in the CA1 and DG areas after HI-LFN exposure. CONCLUSION TRPV4 up-regulation induced neurofilament positive nerve fiber injury in the hippocampus, which was a possible mechanism for memory impairment and cognitive decline resulting from HI-LFN exposure. Together, these results identified a promising therapeutic target for treating cognitive dysfunction in VAD patients.
Animals ; Mice ; TRPV Cation Channels/metabolism* ; Intermediate Filaments/metabolism* ; Hippocampus/metabolism* ; Neurons/metabolism* ; Memory Disorders/metabolism*