Objective To explore the clinical manifestation and laboratory examination of chronic diarrhea in children with acquired immunodeficiency syndrome(AIDS) and analyze the reasons that causes the chronic diarrhea in children.Methods Clinical data of 7 patients (male 4 cases,famale 3 cases)with AIDS with manifestation of chronic diarrhea among the 17 cases were diagnosed as AIDS in Beijing children′s hospital from Jan.1999 to Dec.2006.The time of diarrhea,degree of dinrrhea,characteristic of stool,accompaniment symptom,laboratory examination were retrospectively analyzed.Results The average onset age was 6 years old(from 2-9 years old).The average time of diarrhea was 6 months(from 1-16 months).Four cases main complained with chronic diarrhea,3 cases came to the hospital because of fever,cough and wasting;6 cases with diarrhea,7 cases with malnutrition and anemia,5 cases accompanied hypokalemia and metabolic acidosis,6 cases had delay in growth and development,2 cases with abnormal stool routine exam,1 case with positive stool culture of fungi.All patients were with lower CD4,5 cases with lower CD4/CD8.Conclusions Chronic diarrhea is a common symptom in children with AIDS,and usually accompanied by obvious delay in growth and development,malnutrition and anemia,the reasons that causes the chronic diarrhea are consi-dered to be related with both the opportunistic infection and HIV infection.

A method based on gas chromatography-mass spectrometry (GC-MS) was established to analyze the changes of intracellular metabolites and study the toxic mechanisms of different concentrations of particulate matter (PM2.5) effecting the lung tissues in mice.Nasal drip experiments of PM2.5 suspensions (0, 7.5, 20.0, 37.5 g/L) for mice were carried out, and the intracellular metabolites in lung tissues were extracted, pretreated and analyzed.Principal component analysis (PCA) and partial least-squares discriminant analysis (PLS-DA) were employed for pattern recognition, and an obvious distinction among different conditions was found.According to the PLS-DA loading diagram and variable important factor (VIP) value, 7 kinds of potential biomarkers, alanine, valine, leucine, ornithine, fumaric acid, citric acid and purine (p<0.01), were determined with significant differences between four different concentrations of PM2.5.Metabolic pathway analysis indicated that the oxidative stress reactions were enhanced, and the TCA cycle and the purine metabolism in lung cells were restrained after dripping PM2.5 to the lung tissues in mice.This study could provide a new perspective and theoretical basis for the further analysis on toxic mechanisms by PM2.5.

Objective To compare the myocardial protection effects of cold blood cardioplegia and cold crystalloid cardioplegia in patients undergoing valve replacement surgery.Methods One hundred adult patients with cardiac function Ⅱ～Ⅲ class undergoing primary elective valve replacement surgery due to rheumatic heart disease were retrospectively analyzed.For patients with cardiac arrest,cold blood cardioplegia was applied to 50 cases(Group B),and cold crystalloid cardioplegia to the others(group C).The process of heart resuscitation,the postoperative need of dopamine,the blood pressure and heart rate,the postoperative level of serum myocardial enzyme,the intensive care unit(ICU) stay after operation were collected and statistically analyzed.All the cardioplegic solution was perfused in a similar manner and topical cooling was employed simultaneously.Results There were less cases in group B than in group C who needed isoprenaline for cardiac resuscitation after clamp removal(P0.05).Conclusion The cold blood cardioplegia and cold crystalloid cardioplegia have similar myocardial protection effects on rheumatic heart disease patients with cardiac function Ⅱ～Ⅲ class undergoing valve replacement surgery.

Objective To analyze the MRI features of Hirayama disease(HD)with cervical natural position and its diagnostic val-ue.Methods The natural position of cervical vertebra with MRI examination was used in 1 5 patients and 40 normal people.The spe-cificity and sensitivity of MRI features were analyzed and the ratio of cervical sagittal diameter/cervical transverse diameter (CSD/CTD)of the lower cervical cord was measured.Results CSD/CTD of the patients and control group had a significant difference (t=7.99,P =0.00).The sensitivity of LOA was 86.7%,and its specificity was 88.4%.The sensitivity of atrophy of the lower cervical cord was 80.0%,and its specificity was 79.5%.The sensitivity of the cervical spine curvature abnormalities was 40.0%,and its spe-cificity was 65.2%.The sensitivity of abnormal signal in the spinal cord was 46.7%,and its specificity was 87.5%.The sensitivity of abnormal signal in the epidural outer cavity was 20.0%,and its specificity was 96.8%.Conclusion MRI features of lower cervical cord in combination with clinical symptoms and signs can be helpful for the accurate diagnosis of HD.

Objective To investigate the inhibitory effect of melatonin on the proliferation activity of murine foregastic carcinomac ( MFC) cells via melatonin membrane receptors MT 2 and its relationship with the signaling pathways of mitogen-activated protein kinases ( MAPKs), phosphatidylinositol 3-kinase ( PI3K)-Akt.Methods Using siRNA technology to silence MT2 expression, we examined the ability of melatonin to inhibit the proliferation activity of MFC cells and its influence on the phosphorylation of ERK 1/2 and Akt.Results We found two interesting effects of SiRNA-mediated silencing of MT2 expression.Firstly, it significantly antagonized the inhibitory effect of melatonin on the proliferation activity of MFC cells .Secondly , it partially blocked the inhibitory effect of melatonin on the phosphorylation of ERK 1/2 and Akt.Conclusion Our results suggest that melatonin can inhibit the phosphorylation of ERK 1/2 and Akt via MT2 receptors , thereby inhibiting the proliferation of gastric cancer cells .

Antihypertensive Agents ; therapeutic use ; Endothelin Receptor Antagonists ; therapeutic use ; Familial Primary Pulmonary Hypertension ; Humans ; Hypertension ; drug therapy ; Hypertension, Pulmonary ; drug therapy

Bufalin is an active compound of the traditional Chinese medicine Chansu, which exhibits significant anti-tumor activities in many solid tumors and leukemia cell lines. Bufalin could introduce apoptosis, reverse drug-resistance, and prevent migration and invasion of tumor cells. This paper reviewed the latest research progress of the in vitro and in vivo anti-tumor effect and mechanism of bufalin on a series of cancers, such as hepatocellular carcinoma, lung cancer, colon cancer, gastric cancer, leukemia, bladder cancer, and its formulation study is also summarized for the reference of its further study and application.
Animals ; Antineoplastic Agents ; chemistry ; pharmacology ; therapeutic use ; Bufanolides ; chemistry ; pharmacology ; therapeutic use ; Chemistry, Pharmaceutical ; methods ; Neoplasms ; drug therapy ; pathology

Lipoproteins are biological lipids carriers. The natural and reconstituted lipoprotein based drug delivery systems have been extensively developed in recent years. This article reviews the development of natural and reconstituted low-density lipoprotein and high-density lipoprotein based vehicles in the antitumor area.
Animals ; Antineoplastic Agents ; administration & dosage ; chemistry ; Apolipoproteins B ; administration & dosage ; chemistry ; Drug Carriers ; administration & dosage ; chemistry ; Humans ; Lipoproteins ; administration & dosage ; chemistry ; Lipoproteins, HDL ; administration & dosage ; chemistry ; Lipoproteins, LDL ; administration & dosage ; chemistry ; Nanoparticles ; Neoplasms ; drug therapy ; Peptides ; administration & dosage ; chemistry ; Pharmaceutical Vehicles ; chemistry

Objective:To observe the change of periphery and centra lymphocyte subsets at the crest-time of MOG_(35-55) induced EAE disease in mice,and to explore the alteration of cellular immunity and humoral immunity in the invasion process in EAE.Methods:MOG_(35-55) was used to establish EAE model in femina C57BL/6 mice.The behavioral changes and the histological scores were recorded after the mice were immuned .The changes of CD3~+CD4~+,CD3~+CD8~+,CD4~+CD25~+ and B220~+ on periphery and centra lymphocytes in spleen,brain and spinal cord were analyzed by flow cytometry.Results:The CD3~+CD4~+,CD3~+CD8~+,CD4~+CD25~+ and B220~+ lymphocytes were detected in the brain and spinal cord of EAE group mice,but they were not detected in CFA control group.The CD3~+CD4~+ and CD3+CD8+lymphocytes in the spleen of EAE crest-time group were lower than those in CFA control group(P＜0.05).The B220~+ lymphocytes were obviously higher than in the CFA control group (P＜0.01).And CD4~+CD25~+ lymphocytes were slight higher than the CFA control group.Conclusion:At the crest-time during EAE,the CD3~+CD4~+,CD3~+CD8~+lymphocytes of spleen reduced obviously,B220~+ lymphocytes increased markedly,and the CD4~+CD25~+ lymphocytes just have the increasing trend.It indicates that cellular immunity and humoral immunity coregulated the patho-process at the crest-time of EAE,T lymphocytes and B lymphocytes all played important roles in the pathogenesy of EAE.

Objective To dynamically monitor the blood glucose in traumatic brain injury (TBI) patients within three days after admission, and to assess the impact of hyperglycemia on prognosis. Method Between 2007 and 2008, 62 TBI patients, who were admitted within 6 hours after the ineidence of injury without diahetes or severe combined injuries, were involved in this study. Blood glucose was monitored at 4 time points (instantly, 24 hours, 48 hours, and 72 hours after admission). Patients were classified into the mild, the moderate, or the se-vere TBI group according to GCS (Glasgow Coma Scale) scores, being classified into the survival or the dead group according to prognosis, or into the mile or severe hyperglycemia group depending on whether the blood glucose ex-ceeds 11.1mmol/L on admission. T tests and χ2 tests were applied to analyze the relationship among blood glucose levels, the degrees of injury, and the prognosis of studied patients. Results Patients with mild, moderate, or se-vere TBI showed hyperglycemia with different levels, and the blood glucose levels was consistent with the degree of the injury. The blood glucose of the patients in the dead group were significantly higher at all checked time points than those of the survival group, particularly instantly after admission (8.51±2.01 mmol/L vs. 11.54±2.45 mmol/L, P=0.0001, t=4.988). The mortality of patients with severe hyperglycemia was 64.71%, signifl-candy higher than that of the mild hyperglycemia group 13.95% (P=0.0002, χ2=15.46). The Intensive Care Unit Length of Stay (ICULOS) of the above two groups was 22.6 and 10.2 days,respectively (P=0.021, t= 3.216), but their hospital length of stay (HLOS) showed no statistical difference (P=0.052). Conclusions Hyperglycemia, as an early stress response to TBI, may reflect the degree of the injury. Blood glucose levels that exceed 11.1 mmol/L on admission may imply high mortality of TBI patients, so this could be used as a simple indi-cator to predict prognosis.