OBJECTIVETo investigate electrocardiographic (ECG) and angiographic characteristics of patients with acute solitary posterior myocardial infarction. Patients complicated by inferior wall or right ventricular infarction were excluded.

METHODECG and angiographic changes in 11 patients with acute solitary posterior myocardial infarction admitted to our emergency room from 2001 to 2006 were analyzed.

RESULTSBesides typical ST segment elevation in V(7)-V(9) leads, other ECG manifestations in these patients included V(1)-V(2) R/S > or = 1 (9/11, 81.8%), 1 - 2 mm ST depression in V(1)-V(4) (5/11, 45.5%), 0.5 - 1.5 mm ST elevation in I, aVL leads (4/11, 36.4%) and 0.5 - 1.5 mm ST elevation in V(5)-V(6) leads (5/11, 45.5%). Coronary angiography showed that left circumflex artery (LCX) was the infarction related artery in all cases. The infarction area located before OM1 origination in 1 patient with a 95% pipe-like stenosis (1/11), after OM1 origination in 6 patients (6/11, 4 with total occlusion, 1 with sub-total occlusion and 1 with 90% long length stenosis), in OM1 in 4 patients (4/11, 2 with total occlusion, 1 with sub-total occlusion and 1 with 95% local stenosis). There were 3 patients (27.3%) with single vessel lesion, 4 patients (36.4%) combined with left anterior descending artery (LAD) lesion, 2 patients (18.2%) combined with right coronary artery (RCA) lesion and 2 patients (18.2%) combined with LAD and RCA lesions.

CONCLUSIONSAcute posterior myocardial infarction should be suspected with V(1)-V(2) R/S > or = 1 and V(1)-V(4) ST depression in standard 12 leads ECG. Besides symptoms and cardiac enzyme measurements, recording posterior leads electrocardiogram and performing coronary angiography will help to make the correct diagnosis.

Aged ; Coronary Angiography ; Coronary Vessels ; physiopathology ; Electrocardiography ; Female ; Humans ; Male ; Middle Aged ; Myocardial Infarction ; diagnostic imaging ; physiopathology ; Myocardium ; enzymology

Purpose: Cerebral ischemia is related to insufficient blood supply and is characterized by abnormal reactive oxygen species (ROS) production and cell apoptosis. Previous studies have revealed a key role for basic helix-loop-helix family member e40 (Bhlhe40) in oxidative stress and cell apoptosis. This study aimed to investigate the roles of miR-494-3p in cerebral ischemia/reperfusion (I/R) injury. Materials and Methods: A mouse middle cerebral artery occlusion (MCAO/R) model was established to mimic cerebral ischemia in vivo. Brain infarct area was assessed using triphenyl tetrazolium chloride staining. Oxygen-glucose deprivation/reoxygenation (OGD/R) operation was adopted to mimic neuronal injury in vitro. Cell apoptosis was analyzed by flow cytometry. The relationship between miR-494-3p and Bhlhe40 was validated by luciferase reporter and RNA immunoprecipitation assays. Results: Bhlhe40 expression was downregulated both in MCAO/R animal models and OGD/R-induced SH-SY5Y cells. Bhlhe40 overexpression inhibited cell apoptosis and reduced ROS production in SH-SY5Y cells after OGD/R treatment. MiR-494-3p was verified to bind to Bhlhe40 and negatively regulate Bhlhe40 expression. Additionally, cell apoptosis and ROS production in OGD/ R-treated SH-SY5Y cells were accelerated by miR-494-3p overexpression. Rescue experiments suggested that Bhlhe40 could reverse the effects of miR-494-3p overexpression on ROS production and cell apoptosis. Conclusion MiR-494-3p exacerbates brain injury and neuronal injury by regulating Bhlhe40 after I/R.

BACKGROUNDEndovascular therapy is a treatment option for localized occlusion of the subclavian artery. In this report the long-term experience with 59 patients is presented.

METHODSBetween June 1998 and September 2008, we used endovascular therapy to treat 61 subclavian arterial obstructive lesions in 59 patients (46 males and 13 females, 34 - 82 years of age with a mean age (61.9 + or - 11.0) years). Twenty patients (34%) had clinical symptoms due to vertebrobasilar insufficiency, 26 (44%) had disabling arm ischemia, and 13 (22%) had both symptoms. We performed all procedures under local anesthesia. The approaches were from the femoral artery (n = 47), brachial artery (n = 1, involving bilateral subclavian disease) or both (n = 11). Sixty stents were implanted. All patients were followed-up at 1, 3, 6, and 12 months post-procedure, and annually thereafter.

RESULTSWe achieved technical success in 58 (95.1%) arteries, all of which were stented. There were three technical failures; two were due to the inability to cross over an occlusion, necessitating the switch to an axillo-axillary bypass, and the third was due to shock after digital subtraction angiography and prior to stenting. Arterial stenosis pre- and post-stenting was (83.6 + or - 10.8)% and (2.5 + or - 12.5)% (P < 0.01). Clinical success was achieved in 55 of the 59 patients (93.4%). Of the four clinical failures, three were technical and the remaining patient had a stent thrombosis. Systolic blood pressure difference between the two brachial arteries was (44.7 + or - 18.5) vs. (2.2 + or - 3.9) mmHg (P < 0.01). Primary patency was 98% at 12 months, 93% at 24 months, and 82% at 5 years. Five patients were lost to follow-up by 12 months post-stenting. Significant recurrent obstruction developed in five patients with resumption of clinical symptoms. The overall survival rate was 98.2% at 12 months, 89.5% at 24 months, and 84.5% at 5 years.

CONCLUSIONSEndovascular therapy for proximal subclavian arterial obstructive lesions is effective and successful. This minimally invasive treatment may be the first choice of treatment for proximal subclavical arterial obstructive lesions.

Adult ; Aged ; Aged, 80 and over ; Arterial Occlusive Diseases ; pathology ; therapy ; Female ; Humans ; Male ; Middle Aged ; Stents ; Subclavian Artery ; pathology ; Subclavian Steal Syndrome ; pathology ; therapy ; Vertebrobasilar Insufficiency ; pathology ; therapy

OBJECTIVETo compare the reactogenicity and serology between influenza subunit vaccine and split vaccine.

METHODSA randomized, double-blind study was carried out among children (age 6 - 12 years) in order to compare the safety and immunogenicity of an influenza inactivated subunit vaccine (Agrippal, Chiron Vaccines) with that of a split vaccine (Flurix, GSK).

RESULTSA total of 499 subjects were vaccinated and included in the safety analysis. A total of 249 subjects received Agrippal and 250 received Flurix. All subjects were kept under medical observation for 30 minutes in order to check the evidence of having any immediate local and systemic reaction. Daily observation records were collected during the 3-day follow-up after vaccination. 6.4% of the cases with fever >or= 37.5 degrees C was reported in the Flurix group, but 2.4% in Agrippal group which was significantly less than the former group (P > 0.05). Blood samples (the D0 pre- and D23 post-vaccination sera) were collected from 224 of Agrippal group and 223 of Flurix group and analysed by the haemagglutination inhibition (HI) assay. Agrippal and Flurix induced similar seroprotection (HI titer >or= 1:40, H1N1 99.6% vs 100.0%; H3N2 99.1% vs 99.1%) and seroconversion (4-fold increase, 95.1% vs 97.8%; H3N2 74.5% vs 79.8%) rates and geometric mean titer (GMT) increase (16.0 vs 21.0; 5.4 vs 6.4) against the two A subtypes. A similar seroprotection rate (94.2% vs 96.4%) and GMT increase (21.2 vs 18.2) against the influenza B strain were also noticed in both vaccines. No significant difference was found in the results of immunological assay between the two vaccines (P < 0.05). A lower seroconversion rate against B strain was observed in Agrippal group than in Flurix group (91.1% vs 97.3%).

CONCLUSIONIn terms of safety, both vaccines were generally well tolerated. The fever reaction was less frequently seen in the Agrippal group. Both vaccines induced an effective immune response in the vaccines.

Antibodies, Viral ; blood ; Child ; Double-Blind Method ; Female ; Fever ; chemically induced ; Hemagglutination Inhibition Tests ; Humans ; Influenza A virus ; immunology ; Influenza B virus ; immunology ; Influenza Vaccines ; adverse effects ; classification ; immunology ; Influenza, Human ; prevention & control ; Male ; Safety ; Vaccination ; Vaccines, Inactivated ; adverse effects ; immunology ; Vaccines, Subunit ; adverse effects ; immunology

OBJECTIVETo explore efficacy of neoadjuvant radiochemotherapy in locally advanced low rectal cancer.

METHODSFrom May 2001 to August 2005, 105 patients with locally advanced low rectal cancer (T3, T4) were treated by preoperative radiotherapy to pelvis, 2.0 Gy daily up to 40-46 Gy in 4-5 weeks concomitantly with oral capecitabine at 1250 mg x m(-2) x d(-1) for 10 weeks up to surgery. In all patients surgery was carried out under the rule of total mesorectal excision technique.

RESULTSAll patients finished the course of neoadjuvant radiochemotherapy. Among them, 36 patients experienced adverse effects. Thirteen patients resulted in complete tumor response and spared the operation. Ninety-two patients were operated on with radical resection, among them 71 patients with low anterior resection, 17 with Parks' colo-anal anastomosis and 4 with abdomino-perineal resection, so sphincter preservation was achieved in 96.2%. In postoperative pathological studies, 11 cases showed complete tumor regression. According to the TNM staging system, 24 cases were ranged T0N0, and 23 cases T2N0, 43 cases T3N0, 2 cases T4N0, 5 cases T2N1, 8 cases T3N1; and according to Dworak's tumor regression grading, 5 cases were ranked TGR0, and 18 cases TGR1, 11 cases TGR2, 47 cases TGR3, 24 cases TGR4. Pathologic downstaging was achieved in 78.1%, including complete response (TGR4) and intermediate response (TGR2 + 3). No operative death occurred. Anastomotic leakage was found in 5 cases, including 3 rectovaginal fistula. All patients have been followed up for 16-67 months, and lung metastasis occurred in 4 cases, liver metastasis in 2 patients and local recurrence in 4 patients. Three patients died of distant metastasis. The 3-year disease-free survival was 82.8% and overall survival was 96.5%.

CONCLUSIONSNeoadjuvant radiochemotherapy brings tumor down-staging and increases resectability and sphincter preservation, decreases recurrence and improves survival in locally advanced low rectal cancer.

Chemotherapy, Adjuvant ; adverse effects ; methods ; Disease-Free Survival ; Follow-Up Studies ; Humans ; Neoadjuvant Therapy ; adverse effects ; methods ; Preoperative Care ; methods ; Radiotherapy, Adjuvant ; adverse effects ; methods ; Rectal Neoplasms ; mortality ; surgery ; therapy ; Survival Rate ; Treatment Outcome

Child, Preschool ; Flow Cytometry ; methods ; Genetic Carrier Screening ; Granulomatous Disease, Chronic ; diagnosis ; genetics ; Humans ; Infant ; Male

BACKGROUNDGlucocorticoid receptor (GR) is believed to be a major factor in brain maturation and in modulation of a series of brain activity. Hippocampal neurons are abundant in glucocorticoid receptor, and there is significant change in GR expression under certain pathological state. Epilepsy is a special pathological state of the central nervous system. This study aimed to explore the role of GR in epilepsy by observing the change and functions of GR in hippocampus with a basolateral amygdale-electrical kindled rat epilepsy model.

METHODSFirstly, we established the basolateral amygdale-electrical kindled rat epilepsy model. Then GR mRNA expression in the hippocampus was assayed by semi-quantitative reverse transcription-PCR in this experiment. In addition, the processes of epileptic seizures were observed and electroencephalograms were recorded. One-way analysis of variance (ANOVA) was employed for comparing means of multiple groups, followed Fisher's least significant difference (LSD) for paired comparison.

RESULTSThe rats were successfully kindled after an average of (13.50 ± 3.99) times electrical stimulation, in which it was showed that GR mRNA expression reduced obviously as compared with the control group and the sham groups (P < 0.001). The down-regulation of GR mRNA expression was abated or reversed by some anti-epilepsy drugs (P < 0.001 compared with the epilepsy group), accompanied by attenuation of seizures and improvement of electroencephalograms.

CONCLUSIONSDown-regulation of hippocampal GR mRNA expression may be related to the kindling. Anti-epilepsy drugs exposure can retard this change.

Amygdala ; metabolism ; Animals ; Epilepsy ; genetics ; Kindling, Neurologic ; genetics ; Male ; Rats ; Rats, Sprague-Dawley ; Receptors, Glucocorticoid ; genetics ; Reverse Transcriptase Polymerase Chain Reaction

OBJECTIVETo analyze the surgical treatment and prognosis of non-traumatic acute lower limb ischemia, and compare the morbidity and prognosis of acute arterial embolism and acute arterial thrombosis.

METHODSThe clinical data of 154 acute lower limb ischemia patients surgically treated from July 1999 to December 2007 were retrospectively analyzed. Fogarty catheter embolectomy was used in all patients; in which, 128 cases underwent Fogarty catheter embolectomy only, 8 cases Fogarty catheter embolectomy combined with endarterectomy, 13 cases Fogarty catheter embolectomy combined with vascular reconstruction with prosthetic graft or great saphenous vein, 5 cases Fogarty catheter embolectomy combined with amputation. The patients were divided into two groups according to pathogenesis: acute arterial embolism group (99 cases) and acute arterial thrombosis group (55 cases). The morbidity, amputation, perioperative mortality rates and high risk factors of amputation in the two groups were compared.

RESULTSFemale experienced acute arterial embolism more often than man (60.6% vs 39.4%, P < 0.05), and more acute arterial thrombosis occurred in man (72.7% vs 27.3%, P < 0.05). The amputation rate of all cases was 9.7%, and perioperative mortality rate was 11.7%. The amputation rate in acute arterial embolism group was lower than acute arterial thrombosis group (5.1% vs 18.2%, P < 0.05). The perioperative mortality rates in the two groups were equal (11.1% vs 12.7%, P > 0.05). The statistically high risk factor of amputation for two groups was ischemic time, and smoking and diabetes were high risk factors for acute arterial thrombosis.

CONCLUSIONSMen experiences acute arterial thrombosis more often, and women experiences acute arterial embolism more often. The amputation rate of acute arterial embolism is lower than acute arterial thrombosis, and acute arterial thrombosis has more high risk factors of amputation.

Acute Disease ; Adult ; Aged ; Aged, 80 and over ; Embolism, Cholesterol ; complications ; Female ; Follow-Up Studies ; Humans ; Ischemia ; etiology ; surgery ; Lower Extremity ; blood supply ; Male ; Middle Aged ; Prognosis ; Retrospective Studies ; Thrombosis ; complications ; Treatment Outcome

Objective To study the expression of caspases in stretch-induced apoptosis in human periodontal ligament cells (HPDLCs). Methods HPDLCs in vitro were subjected to mechanical stretch with 20% strain for 6 h or 24 h. The apoptotic rates were analyzed by flow cytometry. The protein expression of caspase-3, -5, -7, -8 and -9 was detected by Western blot, and the activity of caspase-3, -5, -8 and -9 was measured using colorimetric assay. Results Mechanical stretches with 20% strain for 6 and 24 h could induce apoptosis in HPDLCs. Compared with non-stretching control group, the protein expression level and activity of caspase-3, as well as the protein expression level of caspase-7 were up-regulated by 24 h-stretch. The protein expression level and activity of caspase-5, -8, -9 were up-regulated after stretches for 6 h and 24 h. Conclusions Mechanical stretch with 20% strain can induce apoptosis in HPDLCs in vitro, with the activation of caspase-3, -5, -7, -8 and -9.

OBJECTIVETo study the preventive and therapeutic effects of recombinant IFN-alpha2b for nasal spray on SARS-CoV infection in Macaca mulata (rhesus monkey).

METHODSTen rhesus monkeys were divided into two groups, 5 in interferon group, and 5 in control group. Before and after SARS-CoV attack, the virus was detected in samples such as pharyngeal swab in all the two groups by Real-time PCR (RT-PCR) and virus isolation was performed.

RESULTSAfter virus attack, the level of SARS-CoV-specific IgG and neutralizing antibody were induced by SARS-CoV in the interferon group was weaker than in control group. Hematology items showed no apparent changes after virus attack in treated group. Through pathological examination, the morphology of the lung tissues of two Macaques in the treated group was normal, while the other three displayed the interstitial pneumonia with the thickened septum and infiltration with mononuclear cells. Among which, one monkey showed part of thickened septum fused with each other. These lesions in the interferon treated animals were similar to those seen in the animals in control group, but with smaller scope of pathological changes. No significant abnormity was detected in other organs.

CONCLUSIONRecombinant IFN-alpha2b could effectively interdict or weaken SARS-CoV injury in monkeys.

Animals ; Antiviral Agents ; therapeutic use ; Cercopithecus aethiops ; Disease Models, Animal ; Female ; Interferon-alpha ; therapeutic use ; Lung ; drug effects ; pathology ; virology ; Macaca mulatta ; Male ; Monkey Diseases ; drug therapy ; prevention & control ; virology ; Random Allocation ; Recombinant Proteins ; SARS Virus ; drug effects ; isolation & purification ; Severe Acute Respiratory Syndrome ; drug therapy ; prevention & control ; virology ; Vero Cells