Objective To investigate the effect of an oral calcium load on serum electrolytes and PTH concentrations in healthy apheresis donors.Methods Forty-five apheresis donors were divided into two groups: calcium group(11 donors,taking oral calcium before apheresis) and no calcium group(34 donors).Serum parathyroid hormone(PTH),total calcium(Ca),phosphorus(P),potassium(K),sodium(Na) and magnesium(Mg) were measured before and after the apheresis process.Twenty-four whole blood donors served as controls.Results After the apheresis process,PTH concentrations in calcium group and mean P in no calcium group increased significantly(P

Objective To investigate the mechanism of hearing loss after focal cerebral ischemia-reperfusion injury in rats.Methods A total of 60 healthy male adult SD rats were included in this study and randomly divided into 2 groups, ischemia-reperfusion(I/R) group and sham operated control, with 30 rats in each group.The rats in I/R group were operated for suture-occluded method to establish middle cerebral artery occlusion(MCAO)model, with ischemia for 60 mins followed by reperfusion for 24 hrs.The control group was only to be isolated cervical vessels, with no thread embolism inserted.The auditory brainstem response (ABR) was tested before operation and at 24 hrs post-operation respectively.At 24 hrs post-operation, we scored neurological functions, measured the changes of water content in the brain using the dry-wet weight method, and determined the infarct volume through TTC method.We also evaluated the integrity of blood-brain barrier(BBB) by viewing the exudation of Evans blue and observed the apoptosis of neurocyte by TUNEL method to conclude apoptotic index(AI).The expression of MMP-9,Claudin-5,Occludin and CX-43 were detected by Western blot.Results Compared with the sham group,the neurological function scores,the infarct volume and water content of the brain increased, with the elevated thresholds of ABR significantly and AI went up in I/R group.The expression levels of MMP-9 and CX-43 were significantly up-regulated,but the expressions of Claudin-5 and Occludin were obviously down-regulated.All of the differences above had statistical significances.Conclusion The mechanism of hearing loss after focal cerebral ischemia-reperfusion injury in rats is possibly related to MMPs activation,neurocyte apoptosis,BBB breakage and gap junction damage.

Objective To construct sigF deletion mutant of Bacillus anthracis and the complementary strain of sigF deletion mutant in order to analyze the effect of losing sigF on formation of spores.Methods The spectinomycinadenyltransferase gene(spc) was inserted to replace sigF of B.anthracis by homologous recombination.A plasmid which contained sigF and sigF promotor was constructed and then transferred to the mutant to get a complementary strain of sigF deletion mutant.The characters of the mutant were analyzed by measuring growth curves, the ability of carbohydrate metabolism was compared, and spore formation was observed under a microscope.Results The sigF deletion strain A16D2△sigF was constructed from A16D2,which had a similar growth rate to the wild type A16D2 in logarithmic phase, but was not significantly different from the initial strain in the ability to use carbohydrates,although unable to form spores.The strain was found to maintain the state of asymmetric division by microfluidics experiment.Conclusion It is showed by this study that sigF is the essential gene of B.anthracis for spore formation, but not essential for vegetative growth.

OBJECTIVETo investigate the effect of different pH on rectum permeability of chlorogenic acid and geniposide.

METHODFour kinds of Reduning suppositories of different pH were separated and put into the rectum to study the suppositories in vitro and the content of chlorogenic acid and geniposide samples was determined by HPLC to calculate the permeation in 24 hours.

RESULTWith increase of pH within 2.5-7.4, the steady state flux of chlorogenic acid was increased, but the steady state flux of geniposidesamples was steady.

CONCLUSIONAdjusted the pH can increase the rectum permeability of active ingredients in Reduning auppositories.

Animals ; Chlorogenic Acid ; pharmacokinetics ; Drugs, Chinese Herbal ; pharmacokinetics ; Hydrogen-Ion Concentration ; Iridoids ; pharmacokinetics ; Male ; Permeability ; Rats ; Rats, Sprague-Dawley ; Rectum ; metabolism ; Suppositories ; pharmacokinetics

Objective To study the mechanism of endoplamic reticulum stress(ERS)pretreatment induced by 2-DG on the auditory cortex injury after focal cerebral ischemia-reperfusion injury in rats. Methods The SD rats were randomly divided into 3 groups,sham group,I/R group,and ERS pretreatment group. Tread occlusion was used to prepare the model of MCAO in the mice for 60 min followed by reperfusion for 24 h. Neurological assessment was exercised and brain infarction volume was evaluated. The auditory brainstem response was tested. The pathological changes were observed by HE staining. Neurocyte apoptosis was observed by Tunel ,and the apop-tosis index(AI)was determined. Expression of GRP78 and Caspase-12 were detected by immunohistochemistry. Results Compared with the sham group,the neurological scores,ratio of infarct volume and the hearing thresh-olds in I/R group increased significantly. HE staining showed the normal structure disappeared ,and apoptotic index increased significantly. Expression of GRP78 and Caspase-12 protein significantly up-regulated. Compared with I/R group,the indicators above showed improvement to some degrees. Conclusions The ERS pretreatment can alleviate the ischemia-reperfusion injury and neuron apoptosis in auditory cortex ,and reduce the possibility of hearing loss.

OBJECTIVETo investigate the impact of 1, 25-(OH)2D3 on left ventricular hypertrophy (LVH) in type 2 diabetic rats.

METHODSType 2 diabetic mellitus (DM) model rats were established by intraperitoneally injecting with 30 mg/kg streptozotocin. After 8 weeks, 19 male rats were identified as diabetic with left ventricular hypertrophy (LVH) by ultrasound examination, and randomly assigned into three groups: untreated (DM-LVH, n=7), treated with insulin (DM-LVH+INS, n=6), and treated with 1, 25-(OH)2D3 (DM-LVH+VD, n=6). Healthy male rats were used as the controls group (n=6). The fasting blood glucose and the insulin level were determined weekly. The left ventricular mass index, myocardial collagen content, collagen volume fraction, and 1, 25-(OH)2D3-receptor level were determined by 4 weeks later.

RESULTSIn the DM-LVH model group, the insulin level was significantly decreased compared with the non-diabetic control group (P<0.05), whereas the blood glucose, left ventricular mass index, myocardial collagen content, collagen volume fraction, and 1, 25-(OH)2D3-receptor expression were significantly increased (all P<0.05). In the DM-LVH+INS and DM-LVH+VD groups, the insulin levels were significantly increased compared with the DM-LVH model group (P<0.05), whereas the other parameters were significantly decreased (all P<0.05).

CONCLUSION1, 25-(OH)2D3 could reverse LVH in diabetic rats and that the mechanism may involve stimulating insulin secretion and reducing blood glucose via direct up-regulation of 1, 25-(OH)2D3-receptor expression.

Animals ; Blood Glucose ; analysis ; Calcitriol ; therapeutic use ; Diabetes Mellitus, Experimental ; blood ; complications ; Diabetes Mellitus, Type 2 ; blood ; complications ; Hypertrophy, Left Ventricular ; prevention & control ; Insulin ; blood ; Male ; Rats ; Rats, Wistar ; Receptors, Calcitriol ; analysis ; Streptozocin

OBJECTIVETo assess the efficacy and safety of Wuji Powder (WP) and a small dose aripiprazole in treatment of antipsychotic drug-induced phlegm dampness type amenorrhea.

METHODSSeventy female schizophrenic patients with antipsychotic drug-induced galactorrhea-amenorrhea syndrome (GAS) were recruited and randomly assigned to the treatment group and the control group, 35 in each group. All patients received antipsychotic drug therapy. Patients in the treatment group additionally took WP, while those in the control group took aripiprazole (at the daily dose of 5 mg, once daily). The therapeutic course for all was 4 weeks. Prolactin levels and obesity indices[body weight, waist aircumstance, body mass index (BMI) and waist-hit ratio (WHR)] were determined before and after treatment. The efficacy was evaluated.

RESULTSThe treatment course was completed in 95.71% of patients. The total effective rate of the 33 patients of the treatment group was 93.94% (31/33), while it was 91.18% (31/34) in the 34 patients of the control group. There was no difference in the total effective rate between the two groups (P > 0.05). Prolactin levels in both group after treatment were significantly lower than those of the baseline (P < 0.01). There was no significant difference in prolactin levels between the two groups after treatment (P > 0.05). Compared with before treatment, body weight, BMI, waist circumstance, and waist-hip ratio obviously decreased after treatment, showing significant difference when compared with the control group (P < 0.05). There was no significant difference in body weight, BMI, waist circumstance, and waist-hip ratio in the control group between before and after treatment (P > 0.05).

CONCLUSIONSBoth WP and aripiprazole could lower high prolactin levels of schizophrenics with phlegm dampness type amenorrhea. They showed equivalent efficacy. But WP showed more obvious effect in reducing obesity indices.

Aged ; Amenorrhea ; drug therapy ; Antipsychotic Agents ; administration & dosage ; adverse effects ; therapeutic use ; Aripiprazole ; Body Mass Index ; Body Weight ; Drug Therapy, Combination ; methods ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Galactorrhea ; drug therapy ; Humans ; Obesity ; Piperazines ; administration & dosage ; adverse effects ; therapeutic use ; Quinolones ; administration & dosage ; adverse effects ; therapeutic use ; Waist-Hip Ratio

Objective To compare the effects of repetitive transcranial magnetic stimulation (rTMS) at various low frequencies on upper limb function after cerebral infarction.Methods Fifty patients were randomly assigned to a control group (10 cases),a sham rTMS group (10 cases) or an rTMS group which had three sub-groups treated at 0.25 Hz,0.5 Hz and 0.75 Hz with 10 cases in each.All of the patients were treated with conventional medical treatment and rehabilitation training.The sham and true rTMS groups received rTMS applied over the M1 area of the unaffected hemisphere,5 days per week for 4 weeks.Motor evoked potential (MEP) cortical latency,and central motor conduction time (CMCT) were measured and the Fugl-Meyer assessment (FMA),motricity index (MI) and a Hong Kong functional test for the hemiplegic upper extremity (FTHUE-HK) were evaluated beforehand and at Post 1 after 2 weeks of treatment and Post 2 after 4 weeks of treatment.Results The average CMCT and FMA scores of the control and sham rTMS groups both had improved significantly at Post 2.There was no significant difference in any of the indices between those 2 groups at any time point.At Post 1,the average MEP cortical latencies of the 0.25 Hz and 0.5 Hz subgroups had improved to be significantly better than those of the control and sham rTMS groups.The average CMCTs of the 0.25 Hz and 0.5 Hz rTMS subgroups were significantly shorter after treatment,and significantly better than those of the control and sham rTMS groups.At Post 2,the average MEP cortical latency of all groups except the control group showed significant improvement compared with pre-treatment.The 2 indices of the 0.25 Hz and 0.5 Hz subgroups were again significantly shorter than those of the control and sham rTMS groups,and the average CMCTs were significantly better than that of 0.75 Hz subgroup.At Post 1 the average FMA and MI scores of the rTMS subgroups had all improved significantly.In the 0.25 Hz and 0.5 Hz subgroups the average MI scores were significantly higher than those of the control and sham rTMS groups.The FTHUE-HK scores of those 2 subgroups had also improved significantly.At Post 2,the average FMA and MI scores of all groups and the FTHUE-HK scores of rTMS group had improved significantly.In the 0.25 Hz and 0.5 Hz subgroups,all of the indices were significantly better than in the control and sham rTMS groups.The average FTHUE-HK score of the 0.25 Hz subgroup was significantly superior to that of the 0.75 Hz subgroup.In the 0.75 Hz subgroup the average MI score was significantly higher than in the control and sham rTMS groups.Conclusions rTMS at either 0.25 Hz or 0.5 Hz applied to the unaffected hemisphere provides effective treatment for enhancing the excitability of the motor cortex and the motor function of a paretic upper limb after stroke.Compared with others,the total number of stimulus pulse in 0.25 Hz subgroup was the least,and priority consideration should be given to the frequency of 0.25 Hz when using rTMS in clinical treatment of cerebral infarction.

Natural killer (NK) cells, as an essential part of innate immunity, can directly identify and kill tumor cells after being activated by the synergistic action of surface inhibitory receptors and activated receptors. It can secrete cytokines to recruit dendritic cells (DCs), induce DCs maturation and enhance adaptive immune response. It can target cancer stem cells (CSCs) and circulating tumor cells (CTCs) to inhibit cancer metastasis. NK cells have a unique inflammatory tendency, which can respond to cytokines and chemokines released from tumor sites and migrate to tumor sites, making them occupy an important advantage in cancer targeted therapy. The research on cancer targeted therapy of NK cells as drug delivery carriers, NK cell membrane-coated biomimetic nanoparticles, and NK cell extracellular vesicles (NKEVs) has attracted more and more attention. The article will focus on the mechanism of NK cells inhibiting cancer, and summarize the research progress of cancer targeted therapy of NK cells.

OBJECTIVETo study the characteristics of EV71 JN200804 strain infection in one-day old BALBI c mjce and to establish a animal model of EV71 infection , and to provide information and technical support for the evaluation of the EV71 vaccine and antiviral medicine.

METHODSOne-day old BALBic mice were infected with EV71 JN200804 strain through oral( PO) ,intracranial(IC) ,intraperitoneal (IP), intramuscular (IM) routes, respectively. All mice were sacrificed at paralysis of hind limbs and collected organs for viral isolation, RT -PCR and pathological examination, and the electrophysiology were detected before sacrifice.

RESULTSAll mice infected through IC, IP and IM routes were paralyzed in hind limbs at 4-5 days and died at 7 days about, the hypokinesia and lethargy of mice were observed through PO routes. The viruses could be isolated and detected in the muscle from mice infected through IC, IP and IM routes and in the spinal cord through IC routes by viral isolation and RT-PCR. The neurogenic and myogenic disorders were detected by electromyography. Histopathologically, the varied pathologic changes were observed in the mouse cerebellum , spinal cord , muscle , heart, lung, liver and kidney.

CONCLUSIONEV71 JN200804 strain can infect one-day old BALBI c mice and induce paralysis of hind limbs, its animal infection model may apply to study of EV71 infection pathogenesis and antiviral medicine, and evaluation of the EV71 vaccine.

Animals ; Disease Models, Animal ; Enterovirus A, Human ; immunology ; physiology ; Enterovirus Infections ; immunology ; virology ; Mice ; Mice, Inbred BALB C