Objective To explore the behavioral dimensions and validity of the light-dark box(LDB),as an model of state anxiety in Kunming mice.Methods The behavior of adult,male,Kunming mice in LDB was recorded twice,for five minutes,with a one-week inter-trial interval.The following parameters were evaluated by factor analysis:latence for the first entry into the dark area(Latence);percentage of time exploring in the light area (Ltime%);percentage of squares crossing in the light area(Lcross%);percentage of rears in the light area (Lrear%);transitions between two areas(Transition);total number of squares crossing in the whole apparatus (Cross);total number of rears in the whole apparatus(Rear);and number of fecal boli(FB).Results There was a good intercorrelation both among Ltime%,Lcross%,Lrear%,and among Transition,Cross,Rear.A good correlation also was found between test and retest for Transition,Rear and FB.Ltime%,Lcress%and Lrear%had significant loadings on Anxiety factor(Loading%:39.54%,35.40%);Transition loaded on Locomotor factor(Loading%:23.78%,19.66%),combined with Cross;Rear loaded on Exploration factor(Loading%:13.75%,22.60%);and FB loaded on Emotionality factor(Loading%:14.42%,13.02%);Latence was not stable.Conclusion Light-dark box,as an animal model of state anxiety in Kunming mice,comprised three behavioral dimensions:anxiety factor,LDB-activity factor(locomotor factor and exploration factor)and emotionality factor.

Objective To explore the test-retest reliability of the open field test,as a method for ethology in Kunming mice. Methods The behavior of adult male Kunming mice in the open field test was recorded twice,once for five minutes, with a one-week inter-trial interval. The following parameters were evaluated:number of central squares; number of peripheral squares; percent of central squares; number of horizontal squares; number of rearings; total score; and number of fecal boli. Subsequently,the intraclass correlation coefficient (ICC) and the agreement index (Kappa) were calculated for each of these parameters. Results Both ICC and Kappa for total score( ICC =0.902, P＜0.01; Kappa =0.680, P＜0.01; r=0.815, P＜0.01 ) showed a good reliability and correlation between the test trials. Only ICC for number of central squares ( ICC = 0. 578, P ＜ 0.01 ), number of peripheral squares( ICC =0.615, P＜0.01 ) ,percent of central squares(ICC=0.523, P＜0.01) ,number of horizontal squares( ICC = 0. 607, P ＜ 0.01 ) and number of rearings ( ICC = 0. 606, P ＜ 0.01 ) indicated a fair reliability between the test trials. Neither ICC nor Kappa for number of fecal boli displayed a significant reliability between the test trials. The difference of these parameters between test and retest, such as number of peripheral squares( t =3.01, P＜0.01 ),number of horizontal squares( t = 3.34, P ＜ 0.01 ) and total score( t = 7.86, P ＜ 0.01 ) were significant. Conclusion The parameter,total score for Kunming mice in the open field test,is found to be stable over time, and indicates a good reliability with a one-week inter-trial interval.

OBJECTIVETo analyze the application of vertebral pedicle screw fixation in the treatment of burst fracture of thoracolumbar vertebrae.

METHODSA total of 48 cases (31 males and 17 females, aged from 18-72 years, mean: 41.3 years) with thoracolumbar vertebrae burst fracture were treated by pedicle screw system since January 2004. According to the AO classification of thoracolumbar vertebrae fracture, there are 36 cases of Type A, 9 of Type B and 3 of Type C.

RESULTSAll patients were followed up for 6-25 months (average 12 months), no secondary nerve root injury, spinal cord injury, loosening or breakage of pedicle screw were observed. The nerve function of 29 patients with cauda equina nerve injury was restored to different degrees. The vertebral body height returned to normal level and posterior process angle was rectified after operation.

CONCLUSIONSThe vertebral pedicle screw internal fixation was technologically applicable, which can efficiently reposition and stabilize the bursting fractured vertebrae, indirectly decompress canalis spinalis, maintain spine stability, scatter stress of screw system, reduce the risk of loosening or breakage of screw and loss of vertebral height, and prevent the formation of posterior convex after operation.

Adolescent ; Adult ; Aged ; Bone Screws ; Female ; Humans ; Internal Fixators ; Lumbar Vertebrae ; injuries ; Male ; Middle Aged ; Spinal Fractures ; surgery ; Thoracic Vertebrae ; injuries

OBJECTIVETo investigate relations between milk consumption and lactose intolerance (LI) in adults and to explore the effect of milk consumption on lactase activity.

METHODSTotal of 182 subjects aged 20-70 years were recruited and interviewed by questionnaires, and their accumulative cow's milk intake (AMI) was calculated. LI was evaluated by hydrogen breath test (HBT).

RESULTSA negative correlation was found between AMI and severity of observed LI symptom (r=-0.2884; P<0.05). Binary logistic regression analysis showed a negative correlation between LI and duration and frequency of milk consumption (OR, 0.317 and 0.465, respectively; both P<0.05) and a positive correlation between LI and amount of milk consumed per sitting (OR, 6.337; P<0.05).

CONCLUSIONLI is related to various milk consumption behaviors. Most Chinese adults with LI may tolerate moderate milk consumption <160 mL.

Adult ; Animals ; Breath Tests ; China ; epidemiology ; Drinking Behavior ; Humans ; Hydrogen ; Lactase ; metabolism ; Lactose ; Lactose Intolerance ; diagnosis ; epidemiology ; prevention & control ; Milk ; Prevalence

AIMTo study whether the immunosuppressant tripchlorolide (T4) exerts neuroprotective effect on dopaminergic neurons.

METHODSA rat model of Parkinson's disease (PD) was set up by transection of the medial forebrain bundle (MFB) with a wire knife. The rotational behavior, HPLC-ECD, tyrosine hydroxylase (TH) immunocytochemistry, ELISA methods were used to evaluate the influence on the dopaminergic neurons following T4 treatment.

RESULTST4 treatment was shown to effectively attenuate the rotational behavior challenged by amphetamine (2.5 mg.kg-1, i.p.) in the PD rats. T4 markedly prevented the decrease of dopamine content in the striatum and the loss of dopaminergic neurons in the substantia nigra pars compacta. T4 was found to suppress the abnormal increase of TNF-alpha and IL-2 level in brain tissues of PD rats after MFB transection.

CONCLUSIONThe evidence that the immunosuppressive Chinese herb extract T4 possesses neuroprotective activities on the dopaminergic neurons in PD rats was presented. The underlying mechanism of T4 may be relevant to its immunosuppressive activity.

Animals ; Behavior, Animal ; drug effects ; Brain ; metabolism ; Corpus Striatum ; metabolism ; Diterpenes ; pharmacology ; Dopamine ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; Interleukin-2 ; metabolism ; Male ; Neurons ; drug effects ; metabolism ; Neuroprotective Agents ; pharmacology ; Parkinson Disease ; metabolism ; physiopathology ; Phenanthrenes ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Tumor Necrosis Factor-alpha ; metabolism

OBJECTIVETo study the protective effects of polysaccharides from Dendrobium huoshanense (DHP) against CCl4-induced liver injury in mice.

METHODEighty male Kunming mice were randomly divided into normal control group, model control group, dextran control group, starch control group, hydrolyzate control group, three different dose of DPH groups consisting of high-dosage group, middle-dosage group and low-dosage group (200, 100, 50 mg x kg(-1)). Each group contained ten mice. The mice were treated with DHP via intragastric administration for 15 days before treatment of 50% CCl4 in olive oil for consecutive two days. Both alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities in serum and superoxide dismutase (SOD) activities and malondialdehyde (MDA) contents in liver tissues were determined in all groups. Immunohistochemistry was used to detect the expression of TNF-alpha in hepatic tissue. Hepatic histopathological examination was observed.

RESULTDHP effectively decreased the activities of ALT and AST in serum and the contents of hepatic MDA, and restored hepatic SOD activities in acute liver injury mice. Liver tissue damage induced by CCl4 was ameliorated in mice with DHP administration through histopathology examination. Furthermore, the expression of TNF-alpha was greatly decreased in groups treated with polysaccharides.

CONCLUSIONDHP has a significantly hepatoprotective effect on CCl4-induced acute liver injury in mice. Protective effect of DHP on the liver may be related to its function of scavenging free radicals and inhibiting lipid peroxidation and TNF-alpha expression.

Alanine Transaminase ; blood ; Animals ; Aspartate Aminotransferases ; blood ; Carbon Tetrachloride ; toxicity ; Chemical and Drug Induced Liver Injury ; blood ; enzymology ; pathology ; prevention & control ; Dendrobium ; chemistry ; Gene Expression Regulation ; drug effects ; Liver ; drug effects ; metabolism ; pathology ; Male ; Malondialdehyde ; metabolism ; Mice ; Polysaccharides ; chemistry ; pharmacology ; Superoxide Dismutase ; metabolism ; Tumor Necrosis Factor-alpha ; metabolism

Volatile oil components and the contents and types of amino acid in spica of Prunella vulgaris were analysed by GC-MS and amino acid analyzer. Esters, fatty acids, aromatic hydrocarbon, ketone and several alcohol compounds were identified by mass spectrum comparison. In these ingredients, beta-ionone smelled aroma of cedar, raspberry, nerolidol showed weak sweet soft orange blossom flavor, neroli tasted sweet and fresh, nerolidol tasted sweet with light aroma of wood, hexadecanal showed a weak aroma of flowers and wax, alpha-sinensal had rich and fresh sweet orange flavor. To some extent, these types of aromatic substances can affect the taste of herbal tea or decoction made of Spica Prunellae. Among amino acids detected, natural amino acids accounted for a larger proportion, and those natural amino acids showed bitterness, slight bitterness, sourness (freshness), sweetness, slight sweetness, sourness (slight freshness). The results indicated that bitter and slightly bitter amino acids have the greatest impacts on the sense of Spica Prunellae.
Amino Acids ; analysis ; Gas Chromatography-Mass Spectrometry ; Oils, Volatile ; analysis ; Prunella ; chemistry ; Taste

OBJECTIVETo find out the diet measurements for alleviating symptoms of lactose intolerance when people had had a drink of milk.

METHODSEight lactose intolerance (LI) subjects suffering from watery diarrhea were selected from 38 subjects by using hydrogen breath test (HBT) joined the test of drinking cow's milk along with various other foods designed by orthogonal trial. The 100 healthy college students were selected to observe symptoms after they ingested 25 g milk powder in different manners.

RESULTSThe breath-hydrogen concentration in groups with ingesting milk and various other foods was lower than those with ingesting milk only. Egg was better than mantou in alleviating symptoms. (F vaule of stool lactose and symptom score were 7.5, 9.0, respectively, P < 0.05). Whole wheat bread might aggravate flatus. The prevalence of the symptom in 100 college students by drinking milk in fasting state (27/98) was significant in comparing with those drinking milk in regular meal (13/98), chi2 = 6. 156, P < 0. 05.

CONCLUSIONThe study demonstrated that different kinds of food, and different milk drinking manners should affect the intolerance symptoms. We suggested: should not drink milk in fasting state, and drinking milk together with egg and staple food such as steamed bread, bread or gomuti should be the best choice for breakfast. Drinking milk with regular manner might alleviate the symptoms of intolerance. For avoiding lactose intolerance, whole wheat bread should not be taken along with milk.

Adult ; Animals ; Diet Therapy ; methods ; Female ; Humans ; Lactose Intolerance ; diet therapy ; Lactose Tolerance Test ; Male ; Milk ; adverse effects

BACKGROUND: Many studies have showed that apoptosis of endothelial cells plays a curial role in the progress of sepsis. But the role of simvastatin in apoptosis of endothelial cells induced by sepsis is not clear. The present study aimed to investigate the role of simvastatin in apoptosis of endothelial cells induced by sepsis and its mechanism. METHODS: Human umbilical vein endothelial cells (HUVECs) were randomly divided into three groups: control group, sepsis serum intervention group (sepsis group) and simvastatin+sepsis serum intervention group (simvastatin group). After 24-hour incubation with corresponding culture medium, the relative growth rate of HUVECS in different groups was detected by MTT assay; the apoptosis of HUVECs was detected by Hoechst33258 assay and flow cytometry; and the expression of the Bcl-2 and Bax genes of HUVECs was detected by PCR. RESULTS: Compared with the sepsis group, HUVECs in the simvastatin group had a higher relative growth rate. Apoptotic HUVECs decreased significantly in the simvastatin group in comparison with the sepsis group. Expression of the Bcl-2 gene in HUVECs decreased obviously, but the expression of the Bax gene increased obviously after 24-hour incubation with sepsis serum;however, the expression of the Bcl-2 and Bax genes was just the opposite in the simvastatin group. CONCLUSIONS: Our study suggests that simvastatin can inhibit apoptosis of endothelial cells induced by sepsis through upregulating the expression of Bcl-2 and downregulating Bax. It may be one of the mechanisms for simvastatin to treat sepsis.