AIMThe effects of morphine on the potassium ionic currents of caudate nucleus neurons of neonatal rat were studied.

METHODSUsing of whole cell voltage clamp technique on caudate nucleus neurons, applied morphine chronically or acutely on it. In order to research the effects of morphine for voltage-gated of potassium ionic currents.

RESULTSThe amplitude of potassium ionic currents are increased by applied morphine acutely in caudate nucleus from (2.6 +/- 0.4) nA to (3.3 +/- 0.5) Na, naloxone can block the effect of morphine on K+ current and the currents are decreased to (2.4 +/- 0.4) nA. If applied morphine in caudate nucleus chronically, the amplitude of potassium ionic currents are increased from (2.6 +/- 0.4) nA to (3.1 +/- 0. 5) nA. After applied naloxone, the currents are decreased to (2.4 +/- 0.4) nA.

CONCLUSIONThe effects of morphine increased potassium ionic currents by micro-opioid receptor mediated and induced the hyper polarization of neurons, leading to inhibition of neural activity.

Animals ; Caudate Nucleus ; cytology ; drug effects ; physiology ; Morphine ; pharmacology ; Neurons ; drug effects ; physiology ; Patch-Clamp Techniques ; Potassium Channels ; drug effects ; physiology ; Rats ; Rats, Wistar

Objective To evaluate the feasibility and the effect of the early postoperative enteral nutrition on improving the nutritional status, cost of nutrition and hospital stay after operation in abdominal surgery.Methods 48 patients who underwent abdominal operation were allocated into 2 groups: enteral nutrition group(EN group,23 cases) and parenteral nutrition group(PN group,25 cases). It was isonitrogenous and isocaloric intake in both groups. Each day nitrogen intake (0.18±0.02)g/kg,104.6—125.52 kJ(25—30kCal/kg). EN was given at postoperation 8 hours by naso intestinal tube which was placed 30 cm distal to ligament of Treitz or jejunal export loop. PN was provided by peripherally inserted central venous catheters(PICC). The nutritional indices were investigated. A visual analogy scale was used to estimate the infection related complication, cost of nutrition and hospital stay. These parameters were evaluated preoperatively and on the 8th day after operation.Results Early postoperative enteral nutrition showed significant nutrition effect in the patients undergoing abdominal surgery. In the EN group,the nitrogen balance became positive at the postoperative day 4,whereas the nitrogen balance still remained negative in the PN group. The EN group decreased their hospital stay and cost of nutrition compared with that of the PN group(P<0.05). Conclusion The early postoperative enteral nutrition is safe and feasible. It cannot only improve the nutritional status and intestinal function obviously, but also decreased the hospital stay and cost of nutrition compared with parenteral nutrition.

Objective To examine the kinetics of plasma S100A12 and soluble receptor for advanced glycation end products (sRAGE) in infants and young children undergoing cardiopulmonary bypass ( CPB),and to investigate whether they could protective the occurrence of noninfectious pulmonary complication (NPC) after cardiac surgery.Methods This was a case-control study.The subjects included all children aged ＜3 years old who underwent cardiac surgery with CPB during the period from June 1st to July 31st 2011.The patient who showed pulmonary inflammation or had abnormal liver or renal function before surgery was excluded.The remain patients were divided into 2 groups according to whether they had developed NPC postoperatively.Twenty patients were grouped into NPC because they developed the complications of pleural effusion,chylothorax,partial lung collapse,pulmonary hypertensive crisis,airway disorders,pneumothorax,pneumomediastinum,or phrenic nerve palsy.Forty patients were categorized into the no-NPC group.Plasma concentrations of S100A12 and sRAGE were measured using ELISA at baseline,before CPB,immediately after CPB,1 h,12 h and 24 h after operation.Differences concentrations between two groups were analyzed with t test.A stepwise logistic regression analysis was used to indentify the independent risk factor for NPC.A P value ＜0.05 was considered statistically significant.Results Plasma levels of S100A12 and sRAGE dramatically increased immediately after CPB ( P ＜ 0.01 ).The levels of sRAGE dropped to lower than baseline level (P ＜0.05),while S100A12 was still at high level 24h after operation (P ＜0.01 ).Levels of S100A12 and sRAGE immediately after CPB in NPC group were significantly higher than the no-NPC group (P ＜ 0.05).Twenty-four hours after operation,levels of S100A12 were still higher in NPC group than no-NPC (P ＜ 0.01 ),while levels of sRAGE were similar in the two groups ( P ＞ 0.05 ).In the stepwise logistic regression analysis,plasma S100A12 level immediately after CPB remained as a independently predictor for postoperative NPC (OR =1.042,95％ CI:1.010 ～ 1.076,P =0.011 ).Levels of S100A12 immediately after CPB were positively associated with mechanical ventilation time ( r =0.47,P ＜ 0.01 ),duration of surgical Intensive Care Unit ( r =0.407,P =0.002) and hospital stay ( r =0.421,P =0.01 ).Conclusions Plasma levels of S100A12 and sRAGE were significantly increased immediately after CPB and the elevated plasma S100A12 immediately after CPB served as an early reliable biomarker of the occurrence and the prognosis of NPC after CPB in infants and young children.

OBJECTIVETo study the inhibitory effect of the dual usage of BEZ235 and U0126, the inhibitor of phosphatidyl inositol-3-kinase/protein kinase B pathway and extracellular regulated proteinkinase/mitogen-activated protein kinase pathway, respectively, on cell proliferation.

METHODSPhosphatase and tensin homolog knockout mouse embryonic fibroblast (PTEN-/-MEF) cell lines were used as the cellular model for malignant tumors. BEZ235, the dual inhibitor of phosphatidyl inositol-3-kinase and mammalian target of rapamycin, and U0126, the inhibitor of mitogen-activated protein kinase were used to treat the cells individually and in a combination manner. The inhibitory effects to cell proliferation were monitored by MTT.

RESULTSBoth BEZ235 and U0126 suppressed PTEN knockout cell proliferation, and their half inhibitory concentrations were 6.257 nmol/L and 22.85 μmol/L, respectively. However, the combination treatment of the two drugs showed antagonistic rather than synergistic effect on cell proliferation.

CONCLUSIONBEZ235 and U0126 are not suitable for a combined target therapy regimen.

Animals ; Butadienes ; pharmacology ; Cell Line ; Cell Proliferation ; drug effects ; Drug Antagonism ; Fibroblasts ; drug effects ; Imidazoles ; pharmacology ; Mice ; Mice, Knockout ; Nitriles ; pharmacology ; Phosphatidylinositol 3-Kinase ; antagonists & inhibitors ; pharmacology ; Quinolines ; pharmacology

Abstract: Objective　To analyze the detection of SARS‑CoV‑2 in household environment and public place environment of Huangpu District, and describe the feature of SARS‑CoV‑2 contamination in the environment exposure to the infected cases, so as to support the control strategies such as disinfection and health communication. Methods　The results of RT-PCR test for the environmental samples exposure to the cases infected by SARS‑CoV‑2 during February 1 to March 31 2022 in Huangpu District of Shanghai were collected as the research data. Pearson χ2 was used to test the significance of the differences between positive rates of SARS‑CoV‑2 contamination. Results　From February 1 to March 31, household environment samples had a higher positive rate (6.47%, 234/3 618) of SARS‑CoV‑2 contamination while the public place samples had a lower one (1.22%, 47/3 582) in Huangpu District of Shanghai (χ2=141.908, P<0.01). Among the household buildings, the lane houses of old style representing poorer living condition had the highest positive rates (8.31%, 96/1 155) of SARS‑CoV‑2 contamination while the apartments representing better living condition had the lowest (3.59%, 22/612) (F=5.25，P<0.05). Among the samples from household environment, samples regarding sewerage had the highest positive rates (13.30%,58/436) of SARS‑CoV‑2 contamination, while samples regarding the tool of cooking and sweeping had the lowest (3.10%,17/548) (F=9.84，P<0.01). Among the samples from public place environment, samples regarding entertainment tools had the highest positive rates (13.33%, 2/15) of SARS‑CoV‑2 contamination, while samples regarding the tool of cooking and sweeping had the lowest (0.62%, 4/646) (F=4.22，P<0.01). Conclusion　In the environment exposure to the SARS‑CoV‑2 infected cases, the disinfection, ventilation and cleaning should be intensified strictly. SARS‑CoV‑2's surviving in sewage environment should be evaluation dynamically. More health communication should be pushed to people of poorer living condition.

BACKGROUND: Noninvasive monitoring of intra-abdominal pressure (IAP) by measuring abdominal wall tension (AWT) was effective and feasible in previous postmortem and animal studies. This study aimed to investigate the feasibility of the AWT method for noninvasively monitoring IAP in the intensive care unit (ICU). METHODS: In this prospective study, we observed patients with detained urethral catheters in the ICU of Shanghai Tenth People's Hospital between April 2011 and March 2013. The correlation between AWT and urinary bladder pressure (UBP) was analyzed by linear regression analysis. The effects of respiratory and body position on AWT were evaluated using the paired samples t test, whereas the effects of gender and body mass index (BMI) on baseline AWT (IAP<12 mmHg) were assessed using one-way analysis of variance. RESULTS: A total of 51 patients were studied. A significant linear correlation was observed between AWT and UBP (R=0.986, P<0.01); the regression equation was Y=–1.369+9.57X (P<0.01). There were significant differences among the different respiratory phases and body positions (P<0.01). However, gender and BMI had no significant effects on baseline AWT (P=0.457 and 0.313, respectively). CONCLUSIONS: There was a significant linear correlation between AWT and UBP and respiratory phase, whereas body position had significant effects on AWT but gender and BMI did not. Therefore, AWT could serve as a simple, rapid, accurate, and important method to monitor IAP in critical y il patients.

OBJECTIVETo study the mechanisms of tongjingning granule (TJN) on primary dysmenorrhea (PD).

METHODSOne hundred and twenty PD patients were treated with TJN, and 40 patients treated with aspirin as controls. The levels of serum estrogen (E2) and progestin (P) content in the luteal metaphase and anaphase (MI/AI) as well as endothelin (ET) and calcitonin gene related peptide (CGRP) in the metaphase and menstrual stage before and after treatment in partial patients were determined.

RESULTSThe therapeutic effect , and the curative markedly-effective rate and improvement rate of main accompanied symptoms of severe and moderate PD patients in the treated group were superior than those in the control group (P < 0.01). The level of E2 and ET were significantly decreased, and the content of P and CGRP were significantly increased in the treated group after treatment respectively (P < 0.01).

CONCLUSIONJTN not only can regulate ovarian hormone, ET and CGRP, but shows advantages in adjusting spirits and emotions, improving homeostasis and consolidating the therapeutic effect.

Adolescent ; Adult ; Calcitonin Gene-Related Peptide ; blood ; Child ; Drugs, Chinese Herbal ; therapeutic use ; Dysmenorrhea ; blood ; drug therapy ; Endothelin-1 ; blood ; Estradiol ; blood ; Female ; Humans ; Phytotherapy ; Progesterone ; blood

AIMTo investigate the effects of morphine on synaptic transmission of neurons of central nervous system and reveal the mechanism underlying it.

METHODSNew born wistar rats were used for primary culture of hippocampus neurons. Using whole-cell patch-clamp technique, we observed the excitatory and spontaneous inhibitory postsynaptic current (EPSC, sIPSC) and glutamate-induced current before and after morphine treatment.

RESULTS(1) sEPSC of hippocampal neurons was markedly increased after morphine application. The effect of morphine was blocked by opioid antagonist naloxone (n=18, P < 0.01). (2) The frequency of mEPSC and the amplitude of glutamate-induced current of hippocampal neurons had no significant changes after morphine treatment (P > 0.05). (3) Morphine inhibited sIPSC of hippocampal neurons markedly and naloxone could block this effect (n=13, P < 0.01).

CONCLUSIONThe results suggest that the exciting effect of morphine on hippocampal neurons are not due to direct influence of morphine on glutamate synapses transmission, but may result from the inhibition on interneurons, that is "disinhibition" way.

Animals ; Animals, Newborn ; Cells, Cultured ; Excitatory Postsynaptic Potentials ; physiology ; Hippocampus ; cytology ; Inhibitory Postsynaptic Potentials ; Morphine ; pharmacology ; Neurons ; drug effects ; physiology ; Patch-Clamp Techniques ; Rats ; Rats, Wistar ; Synaptic Transmission ; drug effects ; physiology

Betulinic acid is a naturally occurring pentacyclic triterpenoid, which has antiretroviral, antimalarial, and anti-inflammatory properties. The purpose of this study is to investigate the HBV DNA replication inhibition in the mouse model with betulinic acid. Hydrodynamic injection method via the tail vein with the Paywl. 3 plasmid was used to establish the animal mode (n = 15), and the mice were randomly divided into the PBS control group (n = 5), Betulinic acid treatment group (n = 5) and lamivudine control group (n = 5). The day after successful modeling , the mice would have taken Betulinic acid (100 mg x kg(-1)), lamivudine (50 mg x kg(-1)), PBS drugs orally, once daily for 7 days, blood samples were acquired from the orbital venous blood at 3, 5, 7 days after the administering, HBsAg and HBeAg in serum concentration were measured by ELISA and the mice were sacrificed after 7 days, HBV DNA southern detections were used with part of mice livers. The results showed that betulinic acid significantly inhibited the expression of HbsAg in the mice model at the fifth day compared with the control group, and there was no significant differences between the effects of lamivudine and the PBS control group; both the betulinic acid and lamivudine groups had no significant inhibition for the HBeAg expression; the HBV DNA expressions of the liver tissue from the betulinic acid and lamivudine groups were inhibited compared with the control group. Taken together, these results reveal betulinic acid can inhibit the HBsAg expression and replication of the liver HBV DNA in the mouse model.
Acute Disease ; Animals ; Antiviral Agents ; pharmacology ; DNA Replication ; drug effects ; DNA, Viral ; biosynthesis ; Hepatitis B ; blood ; virology ; Hepatitis B Surface Antigens ; blood ; Hepatitis B virus ; drug effects ; genetics ; immunology ; physiology ; Male ; Mice ; Plasmids ; genetics ; Triterpenes ; pharmacology ; Virus Replication ; drug effects

OBJECTIVEIt is revealed that circulating fibrocytes are elevated in patients/animals with cardiac fibrosis, and this review aims to provide an introduction to circulating fibrocytes and their role in cardiac fibrosis.

DATA SOURCESThis review is based on the data from 1994 to present obtained from PubMed. The search terms were "circulating fibrocytes " and "cardiac fibrosis ".

STUDY SELECTIONArticles and critical reviews, which are related to circulating fibrocytes and cardiac fibrosis, were selected.

RESULTSCirculating fibrocytes, which are derived from hematopoietic stem cells, represent a subset of peripheral blood mononuclear cells exhibiting mixed morphological and molecular characteristics of hematopoietic and mesenchymal cells (CD34+/CD45+/collagen I+). They can produce extracellular matrix and many cytokines. It is shown that circulating fibrocytes participate in many fibrotic diseases, including cardiac fibrosis. Evidence accumulated in recent years shows that aging individuals and patients with hypertension, heart failure, coronary heart disease, and atrial fibrillation have more circulating fibrocytes in peripheral blood and/or heart tissue, and this elevation of circulating fibrocytes is correlated with the degree of fibrosis in the hearts.

CONCLUSIONSCirculating fibrocytes are effector cells in cardiac fibrosis.

Coronary Disease ; pathology ; Fibroblasts ; physiology ; Fibrosis ; pathology ; Heart Failure ; pathology ; Humans ; Hypertension ; pathology ; Myocardium ; pathology