Retrospective study on the prevention of infection in patients with hematological malignancies after chemotherapy in a class 100 laminar flow ward / 中国感染控制杂志

Objective To explore the value of class 100 laminar flow ward in the prevention of infection in patients with hematological malignancies(HM) after chemotherapy.Methods Patients with HM and received chemotherapy in the department of hematology in a hospital from March 2016 to February 2017 were surveyed retrospectively,according to patients' wishes,those who were admitted to the class 100 laminar flow ward and received chemotherapy were as trial group,and those who were admitted to the common ward and received chemotherapy were as control group.The incidence of infection,duration of fever,antimicrobial use time,length of hospital stay,and index of infection were compared and analyzed between two groups.Results A total of 267 patients with HM received chemotherapy,74 cases in trial group and 193 in control group.During the chemotherapy period,incidence of infection in trial group was lower than that of control group (47.3％ vs 72.0％,P＜0.001).Respiratory tract,digestive tract,and urinary tract were main infection sites in both groups.A total of 45 strains of pathogens were isolated from two groups of patients,7 strains were isolated from trial group and 38 from control group.The isolated pathogens were Escherichia coli,Klebsiella pneumoniae,Stenotrophomonas maltophilia,Pseudomonas aeruginosa,and yeast.Duration of fever,antimicrobial use time,and length of hospital stay in trial group were all lower than control group (all P＜0.05);serum procalcitonin (PCT) and C-reactive protein (CRP) levels in trial group were both lower than control group(both P＜0.01),the time for PCT and CRP to return to normal in trial group were both lower than control group(both P＜0.05).Conclusion Patients with MH and receive chemotherapy in class 100 laminar flow ward can reduce the incidence of infection,shorten the length of stay,and reduce the economic burden,it is worthy of further clinical promotion.

Influences of Wuqinxi Bird Exercises Combined with Simple Breath Exercises on Quality of Life and Immune Function of Patients with Chronic Obstructive Pulmonary Disease / 广州中医药大学学报

Objective To evaluate the effect of the bird exercises of Wuqinxi bird exercises combined with simple breath exercises on the quality of life and immune function in patients with chronic obstructive pulmonary disease (COPD). Methods Sixty-eight COPD patients were allocated into observation group (N=32) and control group (N=36)according to the intention of the patients. The control group was given conventional inhalation of Seretide and Tiotropium Bromide,and the observation group did Wuqinxi bird exercises and simple breath exercises plus the conventional inhalation therapy. Before and after treatment,we compared the BODE indexes such as body mass index (BMI), air flow obstruction index of forced expiratory volume in one second (FEV1%), dyspnea scores,exercise capacity (6-min walking distance)as well as COPD assessment test (CAT)scores between the two groups before and after treatment. Meanwhile, the changes of T lymphocyte subtype CD3, CD4, CD8, CD4/CD8 levels and serum immunoglobulin M (IgM),IgA,IgG levels were also monitored. Results(1)After intervention, dyspnea scores of the observation group were obviously improved (P < 0.01), while the control group showed no obvious changes in dyspnea scores (P > 0.05). The observation group had better effect on improving dyspnea scores and 6-min walking distance than the control group (P < 0.05 or P <0.01).(2)After intervention,BODE index and CAT scores were improved in the observation group(P<0.01),BODE index was improved in the control group (P < 0.05), and the improvement of BODE index and CAT scores in the observation group was superior to that in the control group (P < 0.05 or P < 0.01). (3)After intervention, T lymphocyte subtype CD3 and CD4 levels as well as the serum IgM, IgA, IgG levels in the observation group were increased (P < 0.05 or P < 0.01),and IgA level in the control group was also increased (P < 0.05). The observation group had stronger effect on increasing T lymphocyte subtype CD3 and CD4 levels than the control group(P < 0.05 or P < 0.01).(4)The difference of adverse reaction incidence was insignificant between the two groups (P > 0.05). Conclusion Application of Wuqinxi bird exercises and simple breath exercises based on conventional inhalation therapy is effective on improving dyspnea, 6-min walking distance, BODE index and CAT scores, and on increasing T lymphocyte subtype CD3 and CD4 levels as well as the serum IgM and IgG levels of COPD patients.

Ion channel mechanism of regulatory volume decrease in human epithelial cells / 中国应用生理学杂志

<p><b>AIM</b>To observe the regulatory volume decrease (RVD) process of human intestine cells and investigate its ion channel mechanism.</p><p><b>METHODS</b>Cultured human intestine cells were exposed to hypotonic solution and the cell volume was measured using Coulter Counter System. RT-PCR was explored to detect the mRNA expression of Ca(2+) -activated K+ channel.</p><p><b>RESULTS</b>Human intestine cells showed a RVD process and this process could be blocked by Cl- channel blocker NPPB and K+ channel blocker TEA. Further results demonstrated the subtype of K+ channel involved in RVD was an intermediate-conductance, Ca(2+) -activated K+ channel (IK) because of its high sensitivity to clotrimazole. RT-PCR results also showed the expression of IK in this cell line.</p><p><b>CONCLUSION</b>The RVD process of intestine cell was dependent on the parallel activation of Cl- channel and K+ channel. The subtype of K+ channel in volved in the RVD process was IK channel.</p>

Availability of autologous transfusion in bilateral sagittal split ramus osteotomy for mandibular prognathism

OBJECTIVE: Autologous transfusion is frequently used with orthognathic surgery. The necessity of autologous transfusion has begun to question alone in bilateral sagittal split ramus osteotomy. The aim of this study was to evaluate the availability of autologous transfusion. METHODS: The chart reviews of sixty patients who had undergone bilateral sagittal ramus osteotomy were done. The subjects were divided into two groups : In experimental group, 30 patients who autodonated 320ml in the preoperative 3 weeks actually received a transfusion in the postoperative 6 hours were included. In control group, 30 patients who underwent the same operation without preoperative donation and any other transfusion were included. Hemoglobin, hematocrit, and changes of these values in both groups were evaluated. RESULTS: 1. From postoperative 3 hours to postoperative 1 day, the increases of hemoglobin(0.8g/dL in experimental group, 0.2g/dL in control group) and hematocrit(0.3% in experimental group, 0.6% in control group) were not statistically significant between both groups. 2. From postoperative 1 day to postoperative 1 week, the increase of hemoglobin(0.6g/dL in experimental group, 0.3g/dL in control group) was not statistically significant between both groups. But the increase of hematocrit(2.5% in experimental group, 1.0% in control group) was statistically significant between both groups over the same period(hematocrit p=0.043). 3. On postoperative 1 week, the values of hemoglobin(12.3% in both groups) and hematocrit(35.6% in experimental group, 36.8% in control group) were not statistically significant between both groups. CONCLUSION : The autologous transfusion in surgery of just a little blood loss was not effective. The most results show that there is little availability of autologous transfusion according to changes of hemoglobin and hematocrit in bilateral sagittal split ramus osteotomy.

The anxiety in patients undergoing third molar extraction

The purpose of this study is to understand anxiety in patients undergoing third molar extraction and care patients of third molar extraction. The subjects in the study were Sixty-three patients who visited the department of dentistry at Pusan Paik Hospital from May 2006 to September 2006 and who underwent third molar extraction. Patients' anxiety(state anxiety and trait anxiety) to use Spielberger's state-trait anxiety inventory(STAI) were measured. They were asked to fill out STAI question paper immediately before third molar extraction(pre-extraction) and on the day after the extraction(post-extraction). And visual analog scale(VAS) to measure patient's postoperative pain on the day after extraction(postextraction day) was used. Then Differences in anxiety before and after extraction, between men and women, between the first and second extraction, with impacted versus nonimpacted third molar extraction, between extraction time and anxiety, and between postoperative pain and anxiety were evaluated. The anxiety status of patients undergoing third molar extraction could be quantitatively evaluated using the STAI-KYZ. There were significant difference before and after third molar extraction. Especially women and patients of more severe postoperative pain was more anxious. We need to alleviate patient's anxiety(especially women) and to control postoperative pain throughout the tooth removal process.

Effect of Herba Epimedii flavone on the osteoblasts metabolism in vitro / 中国中药杂志

<p><b>OBJECTIVE</b>To explore the effect of Herba Epimedii flavone (HEF) on the osteoblast metabolism in vitro.</p><p><b>METHOD</b>Osteoblast were obtained from new born rat calvaria by digestive enzymes. MTF, PNPP and RT-PCR were used to observe the proliferation, activity of ALP and mRNA expression of OPG and RANKL of cultured osteoblasts in vitro.</p><p><b>RESULT</b>It was found that HEF had the effect on stimulating cell proliferation, activity of ALP and the mRNA expression of OPG of cultured osteoblasts (P < 0.01, P < 0.05).</p><p><b>CONCLUSION</b>HEF can promote the proliferation, the differentiation and the expression of OPG mRNA of the osteoblasts cultured in vitro.</p>

Experimental study of the effects of puerarin on biological characters of osteoblasts in vitro / 中国中药杂志

<p><b>OBJECTIVE</b>To observe the effect of puerarin on cell proliferation, differentiation, maturation and mineralization in cultured rat osteoblasts.</p><p><b>METHOD</b>Osteoblasts from craniums of newly born SD rats were cultured in vitro. MTT, PNPP and ARS were used to observe the proliferation, activity of ALP and the number of mineral node of cultured osteoblasts in vitro.</p><p><b>RESULT</b>It was found that puerarin had the effect on stimulating cell proliferation, activity of ALP and the number of mineral node of cultured osteoblasts (P < 0.01 or P < 0.05).</p><p><b>CONCLUSION</b>Puerarin can promote proliferation, differentiation, maturation and mineralization of the osteoblasts in vitro.</p>

An electrophysiological study on the anti-ventricular arrhythmic effect of adenosine in the guinea pig / 生理学报

Using whole-cell patch clamp technique this study investigated the effects of adenosine (Ado) on action potential, L-type calcium current (I(Ca.L)), delayed afterdepolarizations (DADs), and transient inward current (I(ti)) induced by isoproterenol (Iso) in guinea pig isolated single ventricular myocytes. The results showed: (1) Ado alone had no significant direct effects on action potential and I(Ca.L) in guinea pig ventricular myocytes at 20-100 micromol/L. However, Ado significantly attenuated the prolongation of action potential duration (APD) and the increase of the peak amplitude of I(Ca.L) induced by Iso. Iso (10 nmol/L) markedly increased APD(50) and APD(90) from 340+/-21 ms to 486+/-28 ms and from 361+/-17 ms to 501+/-29 ms, respectively (P<0.01), and increased the amplitude of I(Ca.L) from 6.53+/-1.4 pA/pF to 18.28+/-2.4 pA/pF (P<0.01). The peak potential of current-potential relationship shifted to the left. Ado (50 micromol/L) abbreviated APD(50), APD(90) to 403+/-19 ms and 419+/-26 ms (P<0.01), and decreased the peak amplitude of I(Ca.L) to 10.2+/-1.5 pA/pF (P<0.01 vs Iso), but did not change resting membrane potential (RMP), action potential amplitude (APA), and overshoot (OS). (2) Iso (30 nmol/L) reproducibly elicited DADs with 100% incidence of DADs under this condition. Ado (50 micromol/L) completely inhibited Iso from inducing DADs. Iso (30 nmol/L) elicited I(ti) with 2-second depolarizing voltage-clamp pulses rising to +20 mV from a holding potential of -40 mV, the incidence of I(ti) being 100%, and the I(ti) was suppressed in the presence of Ado (50 micromol/L) with the incidence of I(ti) decreased to 14.3% (P<0.05). These data indicate that Ado antagonizes the stimulatory effect of Iso, and that the antiarrhythmic mechanism of Ado preventing Iso-induced DADs is due to the inhibition of intracellular Ca(2+) overload through attenuating the prolongation of APD, the enhance of I(Ca.L) and I(ti).

Different effects of acetylcholine on the action potential and force contraction in guinea pig atrial and ventricular myocardium / 生理学报

The purpose of this study was to investigate the different effects of ACh on the action potential and force contraction in guinea pig atrial and ventricular myocardium by using standard microelectrodes and force transducer. The results showed that the duration of the action potential (APD) of atrial myocardium was shortened from 208.57+/-36.05 to 101.78+/-14.41 ms (n=6, P<0.01), and the APD of the ventricular myocardium was shortened from 286.73+/-36.11 to 265.16+/-30.06 ms (n=6, P<0.01).The amplitude of the action potential (APA) of the atrial myocardium was decreased from 88.00+/-9.35 to 62.62+/-20.50 mV (n=6, P<0.01), while the APA of the ventricular myocardium did not change significantly.The force contraction of atrial myocardium was inhibited completely (n=6, P<0.01), while the force contraction of ventricular myocardium was inhibited by 37.57+/-2.58% (n=6, P<0.01). The ACh effects correlated with its concentration. The K(D) of the APD shortening effects in the atrial and ventricular myocardium were 0.275 and 0.575 micromol/L. The K(D) of the negative inotropic in the atrial and ventricular myocardium were 0.135 and 0.676 micromol/L, respectively. The corresponding data points were compared using t test between the atrial and ventricular myocardium, and the differences were significant when the ACh concentration was above 10 nmol/L. Furthermore, atropine (10 micromol/L) and CsCl (20 mmol/L) blocked the effects of 10 micromol/L ACh on the APD of ventricular myocardium, while CdCl2 (0.1 mmol/L) had no influence on these effects. In conclusion, ACh could shorten the action potential duration and inhibit the force contraction of atrial and ventricular myocardium in a concentration-dependent manner. There are differences in the effects of ACh on the atrial and ventricular myocardium. The atrial myocardium is more sensitive to ACh than the ventricular myocardium. It is probable that the muscarinic receptor and the potassium channel, but not the calcium channel, are involved in the ACh-induced shortening of the ventricular APD.

Effect of extracellular chloride concentration on deactivation kinetics of rat ClC-1 chloride channel / 生理学报

The gating mechanism of ClC-1 chloride channel was studied in this paper by heteroexpression of rat wild type ClC-1 gene in Xenopus oocytes and by two-electrode voltage clamping technique. The deactivation gating kinetic parameters were obtained by applying two exponential fitting of the deactivating currents at various extracellular chloride concentrations. It was found that decrease in extracellular chloride concentration increased the fractional amplitude of fast deactivating component, and depressed the fractional amplitude of slow deactivating component accompanied by a decrease in fast and slow deactivating time constants. These results demonstrate that the deactivation kinetic parameters of ClC-1 are largely dependent on the extracellular chloride concentration, which induces changes in channel gating.