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Objective To observe the effectiveness of fluorescence labeling-based assay bundle intervention in the prevention and control of multidrug-resistant organism(MDRO)infection.Methods Patients who were detected MDRO in a hospital from January to December 2022 were selected as the research subjects.MDRO monitoring data and implementation status of prevention and control measures were collected.Fluorescence labeling assay was adopted to monitor the cleaning and disinfection effectiveness of the surrounding object surface of the bed units.Based on the bundled prevention and control measures as well as management mode of the pre-intervention group,the post-intervention group implemented enhanced rectification measures for the problems found by the pre-interven-tion group.Changes in relevant indicators between January-June 2022(before intervention)and July-December 2022(after intervention)were compared.Results There were 136 MDRO-infected patients in the pre-intervention group,208 MDRO strains were detected and 10 healthcare-associated infection(HAI)occurred.There were 128 MDRO-infected patients in the post-intervention group,198 MDRO strains were detected and 9 HAI occurred.Af-ter intervention,the total detection rates of methicillin-resistant Staphylococcus aureus(MRSA),carbapenem-re-sistant Acinetobacter baumannii(CRAB),and total MDRO from patients decreased significantly compared to before intervention(all P<0.05).After intervention,the detection rates of MRSA,carbapenem-resistant Pseudomonas aeruginosa(CRPA),CRAB,and total MDRO from the surrounding object surface were all lower than those before intervention(all P<0.05).The detection rate of MDRO from surrounding object surface before intervention was 34.52%,which showed a decreased trend after intervention(P<0.05).The clearance rate of fluorescent labeled markers before intervention was 41.84%,which showed an upward trend after implementing intervention measures(from July to December),and increased to 85.00%at the end of intervention(November-December).The comp-liance rates of issuing isolation medical orders,placing isolation labels,using medical supplies exclusively,and cor-rectly handling medical waste after intervention have all increased compared to before intervention(all P<0.05).Conclusion Adopting fluorescence labeling-based assay bundle intervention can effectively improve the effectiveness of MDRO infection prevention and control.
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Homeostasis is a dynamic balance process of self-regulating. Biological systems remain stable through adapting to changing external conditions to maintain normal life activities. Homeostatic medicine is the science of studying homeostasis of human molecules, cells, organs and the whole body. It is a comprehensive discipline based on maintaining homeostasis to keep human health and assist for diseases prevention and diagnoses. Homeostatic medicine focuses on the whole body and on the role of homeostasis in health and disease, which is expected to provide new ideas and strategies for maintaining health as well as diagnosing and treating diseases. Nitric oxide (NO) plays an important role in the control of multisystem homeostasis. Nitrate is an important substance in regulating NO homeostasis through the nitrate-nitrite-NO pathway. Sialin, nitrate transporter which is located in the cell membrane and cytoplasm, mediates multiple cellular biological functions. The nitrate-nitrite-NO pathway and sialin-mediated biological functions play an important role in the regulation of body homeostasis.
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Humains , Nitrates/métabolisme , Nitrites/métabolisme , Homéostasie , Monoxyde d'azoteRésumé
Objective: To evaluate the efficacy and safety of Morinda officinalis oligosaccharide (MOO) capsules for depressive disorder. Methods: Eight electronic databases were searched for relevant studies from inception to April 19, 2020. Randomized controlled trials comparing MOO capsules with antidepressants were included. Data analysis was conducted using Review Manager 5.3 software. The risk of bias was assessed using the Cochrane Risk of Bias Tool, and the quality of the studies was evaluated by two researchers using the Grading of Recommendation, Assessment, Development and Evaluations (GRADE) software. Results: Seven studies involving 1,384 participants were included in this study. The effect of MOO capsules for moderate depressive disorder was not different from that of antidepressants (risk ratio [RR] = 0.99, 95%CI 0.92-1.06). Regarding adverse events, no significant difference was found between MOO capsules and antidepressants (RR = 0.84, 95%CI 0.65-1.07). In addition, the quality of evidence related to these adverse events was rated as low. Conclusion: This systematic review suggests that the efficacy of MOO capsules in the treatment of mild to moderate depression is not inferior to that of conventional antidepressants, which may provide a new direction for clinical alternative selection of antidepressants. However, more high-quality research and detailed assessments are needed.
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Humains , Morinda , Trouble dépressif/traitement médicamenteux , Oligosaccharides/effets indésirables , Capsules/usage thérapeutique , Antidépresseurs/effets indésirablesRésumé
Objective:To identify causative genes for autosomal recessive woolly hair (ARWH) in a family.Methods:Clinical data were collected from two patients and other family members in a Chinese pedigree of Han nationality with ARWH. Peripheral blood samples were obtained from the two patients, their unaffected parents and 100 unrelated healthy individuals, and DNA was extracted from the blood samples. A next-generation skin-targeted sequencing panel was used to detect gene mutations in the patients, and Sanger sequencing was performed to verify the sequencing results. The function of protein encoded by the mutant gene was predicted.Results:Two missense mutations c.530T>G (p.Leu177Arg) and c.736T>A (p.Cys246Ser) were both identified in the LIPH gene of the two patients, which were inherited from their father and mother respectively. Neither of the two mutations was identified in the 100 unrelated healthy controls. Interspecies sequence alignment showed that leucine at amino acid position 177 and cysteine at amino acid position 246 of the protein encoded by the LIPH gene were highly evolutionarily conserved. As SIFT and Polyphen-2 softwares showed, the mutations c.530T>G (p.Leu177Arg) and c.736T>A (p.Cys246Ser) were both predicted to be detrimental variations.Conclusion:Two missense mutations c.530T>G (p.Leu177Arg) and c.736T>A (p.Cys246Ser) in the LIPH gene may contribute to the clinical phenotype of the two patients with ARWH in this family.
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Objective@#This study was performed to compare the genetic diversity, virulence, and antimicrobial resistance of @*Methods@#A total of 38 clinical strains and 19 strains from healthy individuals were isolated from the samples collected in Ma'anshan City, Anhui Province. Their taxonomy was investigated using concatenated @*Results@#The 57 @*Conclusions@#The taxonomy, virulence properties, and antibiotic resistance of
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Humains , Aeromonas/pathogénicité , Études cas-témoins , Résistance bactérienne aux médicaments/génétique , Variation génétique , Facteurs de virulence/génétiqueRésumé
Objective:To evaluate the effect of mechanical chest compression device in patients with cardiac arrest.Methods:The relevant literatures about mechanical cardiopulmonary resuscitation and manual cardiopulmonary resuscitation were systematically searched from China Knowledge Network (CNKI), VIP, Wanfang, PubMed, Web of Science and other databases. The effective data were extracted and analyzed by RevMan5.3 software.Results:A total of 20 clinical studies involving 29 727 patients were included, of which 11 104 patients received mechanical cardiopulmonary resuscitation and 18 623 patients received traditional manual cardiopulmonary resuscitation. The results of meta-analysis showed that mechanical cardiopulmonary resuscitation could not effectively improve the restoration of spontaneous circulation (ROSC) rate, admission survival rate, discharge survival rate and neurological prognosis in patients with cardiac arrest compared with manual cardiopulmonary resuscitation. ROSC occurrence rate ( RR=1.10, 95% CI: 0.99-1.23, P<0.01), admission survival rate ( RR=1.01, 95% CI: 0.95-1.08, P=0.67), discharge survival rate ( RR=1.00, 95% CI: 0.86-1.15, P=0.14), and good neurological function rate ( RR=0.81, 95% CI: 0.61-1.06, P=0.69) showed no significant differences between the mechanical cardiopulmonary resuscitation and manual cardiopulmonary resuscitation. Conclusions:Mechanical chest compression device has no advantage compared with manual cardiopulmonary resuscitation. Mechanical cardiopulmonary resuscitation is not recommended to completely replace manual chest compression in cardiopulmonary resuscitation.
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Background@#The accessory tendon of the extensor hallucis longus (ATEHL) muscle is a common abnormal structure, and its clinical significance remains debatable. In this study, we provide the incidence of the ATEHL and characterize its morphological types in Asian cadavers and investigate its clinical applications. @*Methods@#The tendons from 50 adult cadaveric feet, fixed in 10% formalin, were analyzed. We measured the length and width of both the ATEHL and the extensor hallucis brevis (EHB). @*Results@#All dissected specimens had an ATEHL. The first metatarsophalangeal joint was surrounded by an accessory tendon that inserted onto the joint capsule and the dorsal base of the proximal phalanx. We classified the ATEHL into 3 types based on their directions. Differences in ATEHL type based on sex were not statistically significant. @*Conclusions@#We found an ATEHL in all cadaveric specimens in this study. We surmise that the ATEHL acts as an antagonist with the EHB when the toe is extending, which might help prevent the occurrence of hallux valgus deformity.
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Background@#The accessory tendon of the extensor hallucis longus (ATEHL) muscle is a common abnormal structure, and its clinical significance remains debatable. In this study, we provide the incidence of the ATEHL and characterize its morphological types in Asian cadavers and investigate its clinical applications. @*Methods@#The tendons from 50 adult cadaveric feet, fixed in 10% formalin, were analyzed. We measured the length and width of both the ATEHL and the extensor hallucis brevis (EHB). @*Results@#All dissected specimens had an ATEHL. The first metatarsophalangeal joint was surrounded by an accessory tendon that inserted onto the joint capsule and the dorsal base of the proximal phalanx. We classified the ATEHL into 3 types based on their directions. Differences in ATEHL type based on sex were not statistically significant. @*Conclusions@#We found an ATEHL in all cadaveric specimens in this study. We surmise that the ATEHL acts as an antagonist with the EHB when the toe is extending, which might help prevent the occurrence of hallux valgus deformity.
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@#AIM: To investigate the best time for indwelling catheter of patients with chronic dacryocystitis after lacrimal drainage tube implantation.<p>METHODS: Totally 143 eyes of 143 patients with chronic dacryocystitis after lacrimal drainage tube implantation were selected in our hospital. They were divided into 3 groups including group A(50 eyes of 50 cases)with indwelling catheter in 9wk after tube implantation, group B(57 eyes of 57 cases)with indwelling catheter in 12wk after tube implantation, and group C(36 eyes of 36 cases)with indwelling catheter in 6wk after tube implantation. The clinical efficacy, visual acuity, incidence of epiphora, recurrence rate and incidence of postoperative complications with followed-up among three groups were compared.<p>RESULTS: On the day of extubation, the total effective rates of the three groups were 94%, 93% and 39%, the difference was statistically significant(<i>P</i><0.0167). The total effective rates of group A and group B were better than those of group C, and the difference was statistically significant(χ2=30.830, 32.056, <i>P</i><0.001). At 3mo after extubation, the total effective rates of the three groups were 56%, 51% and 36%, there was no significant difference(χ2=3.454, <i>P</i>=0.178). At 3mo after extubation, there was no significant difference in the visual acuity and the incidence of epiphora among the three groups(<i>P</i>>0.05). At 6mo after extubation, the recurrence rates of the three groups showed no significantly different(<i>P</i>=0.056). The incidence of postoperative complications in three groups were 4%(2/50), 7%(4/57)and 25%(9/36), the difference was statistically significant(χ2=11.048, <i>P</i>=0.004). The incidence of postoperative complications in group C was higher than that in groups A and B(χ2=6.499, 5.934; <i>P</i>=0.011, 0.015).<p>CONCLUSION: The clinical benefits of 6wk and 9wk after lacrimal drainage tube implantation are better than that of 12wk.
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Objective To explore the factors that contribute to the anxiety and depression in obstructive sleep apnea hypopnea syndrome (OSAHS) patients in terms of excessive daytime sleepiness (EDS) and sleep quality.Methods A total of 196 OSAHS patients,including 103 severe patients and 93 mild-moderate patients,were enrolled.Polysomnography was carried on at the sleep center of the First Hospital of China Medical University between May 2013 and November 2015.According to the Epworth sleepiness scale (ESS) and the subject daytime sleepiness symptom,all patients were divided into EDS group and non-EDS group.The patients' general information and subjective symptoms were recorded.Emotional states were assessed with self-rating anxiety scale (SAS) and self-rating depression scale (SDS).Sleep quality was evaluated with Pittsburgh sleep quality index (PSQI).The anxiety and depression related factors were studied by regression analysis.Results (1) In severe OSAHS group,the patients with EDS showed higher PSQI(6.22± 2.57 vs.4.05± 3.72,P<0.01) and oxygen desaturation index(ODI)[(57.70±17.53) events/h vs.(48.23 ± 22.01)events/h,P<0.05] when compared with those without EDS.(2) In both severe and mild-moderate OSAHS groups,the patients with EDS presented higher SAS scores (severe:33.86±7.60 vs.28.95 ± 4.71,mild-moderate:37.46± 10.68 vs.33.40± 11.07,P<0.05)and SDS scores(severe:32.81 ± 8.36 vs.28.90±4.53,mild-moderate:36.98± 12.77 vs.31.70±10.94,P<0.05)when compared with those without EDS.(3) The multiple regression analysis showed that the SAS scores were related to ESS,PSQI,insomnia and nasal obstruction (R2=0.356,P<0.05),and the SDS scores were related to ESS,PSQI and insomnia(R2=0.344,P<0.05).Conclusions The anxiety and depression of OSAHS patients are closely related to the severity of EDS and sleep quality.Both severe and mild-moderate OSAHS patients with EDS have worse anxiety and depression scores.
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<p><b>Background</b>It is known that there is a definite association between platelet distribution width (PDW) and poor prognosis in patients with coronary artery disease (CAD) and type 2 diabetes mellitus (T2DM). However, there are no data available regarding the prognostic significance of PDW for in-stent restenosis (ISR) in patients with CAD and T2DM. We aimed to determine the value of PDW on admission that predicted ISR in patients with CAD and T2DM.</p><p><b>Methods</b>Between January 2012 and December 2013, a total of 5232 consecutive patients diagnosed with CAD and T2DM undergoing percutaneous coronary intervention were admitted. Three years of retrospective follow-up was undertaken. A total of 438 patients with second angiography operations were included. ISR was defined as ≥50% luminal stenosis of the stent or peri-stent segments. Continuous data were presented as the mean ± standard deviation or median (P, P) and were compared by one-way analysis of variance or Kruskal-Wallis H-test. Categorical variables were presented as percentages and were compared by Chi-square test or Fisher's exact test. The association between PDW and ISR was calculated by logistic regression analysis. A two-sided value of P < 0.05 was considered statistically significant. Statistical analyses were performed by SPSS version 22.0 for windows.</p><p><b>Results</b>Fifty-nine patients with ISR, accounting for 13.5% of the total, were included. ISR was significantly more frequent in patients with higher PDW quartiles compared with lower quartiles. We observed that PDW had a strong relationship with mean platelet volume (r = 0.647, 95% confidence interval [CI]: 0.535-0.750, P < 0.0001). The receiver-operating characteristic curves showed that the PDW cutoff value for predicting ISR rate was 13.65 fl with sensitivity of 59.3% and specificity of 72.4% (area under curve [AUC] = 0.701, 95% CI: 0.625-0.777, P < 0.001). Multivariate analysis showed that the risk of ISR increased approximately 30% when PDW increased one unit (odds ratio [OR]: 1.289, 95% CI: 1.110-1.498, P = 0.001). Patients with higher PDW, defined as more than 13.65 fl, had a 4-fold higher risk of ISR compared with lower PDW (OR: 4.241, 95% CI: 1.879-9.572, P = 0.001). Furthermore, when patients were divided by PDW quartiles values, PDW was able to predict ISR (Q2: OR = 0.762, 95% CI: 0.189-3.062, P = 0.762; Q3: OR = 2.782, 95% CI: 0.865-8.954, P = 0.086; and Q4: OR = 3.849, 95% CI: 1.225-12.097, P = 0.021, respectively; P for trend <0.0001).</p><p><b>Conclusion</b>PDW is an independent predictor of ISR in patients with CAD and T2DM.</p>
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Adulte , Sujet âgé , Femelle , Humains , Mâle , Adulte d'âge moyen , Plaquettes , Métabolisme , Maladie des artères coronaires , Métabolisme , Thérapeutique , Resténose coronaire , Métabolisme , Thérapeutique , Diabète de type 2 , Métabolisme , Thérapeutique , Volume plaquettaire moyen , Intervention coronarienne percutanée , Études rétrospectivesRésumé
<p><b>BACKGROUND</b>High rate of in-stent restenosis (ISR) remained an unsolved clinical problem in clinical practice, especially among patients with diabetes mellitus (DM). Diabetic patients often had hypertriglyceridemia with elevated levels of very low-density lipoprotein cholesterol (VLDL-C). Increasing evidence suggested that VLDL-C was known as a significant risk factor for atherosclerosis and had been recommended as a treatment target by current dyslipidemia guidelines. However, the role of VLDL-C in the occurrence and development of ISR in coronary artery disease (CAD) patients with DM had not been studied. The aim of this study was to evaluate the association between the elevated levels of VLDL-C and the risk of ISR in CAD patients with DM.</p><p><b>METHODS</b>A total of 1390 diabetic patients, who underwent coronary drug-eluting stent (DES) implantation at Beijing Anzhen Hospital and followed up by angiography within 6-24 months, were consecutively enrolled. Patients' demographic and clinical characteristics, including age, gender, CAD risk factors, family history, life style, medical history, and coronary angiographic information, were collected carefully at baseline percutaneous coronary intervention and follow-up angiography. Multivariate Cox's proportional hazards regression modeling using the step-wise method (entry, 0.05; removal, 0.05) was used to determine the independent risk associated with ISR in diabetic patients.</p><p><b>RESULTS</b>Finally, 1206 of patients were included in this study. ISR occurred in 132/1206 diabetic patients (10.9%) by follow-up angiography. Patients with ISR had elevated median serum VLDL-C levels compared with those without ISR (0.65 mmol/L vs. 0.52 mmol/L, P = 0.030). The multivariate regression analysis showed that VLDL-C was significantly associated with the risk of ISR in diabetic CAD patients (hazard ratio [HR] = 1.15, 95% confidence interval [CI]: 1.03-1.29, P = 0.017). The HR for the risk of ISR associated with VLDL-C level ≥0.52 mmol/L was 3.01 (95% CI: 1.24-7.34, P = 0.015).</p><p><b>CONCLUSION</b>The elevated level of serum VLDL-C was a significant and independent risk factor for ISR in diabetic CAD patients after coronary DES implantation.</p>
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Objective·To investigate the effects of insulin-like peptide 6 (Insl6) on renal fibrosis and calcification in unilateral ureteral obstruction (UUO) mice. Methods·Twenty-four SPF male mice with genotypic background of C57BL/6 were divided into Sham (n=8), UUO+saline (n=8) and UUO+Insl6 (n=8) groups randomly. Mice were sacrificed 10 days after operation and renal tissues of surgical side were obtained. Sirus red staining, Masson staining and alizarin red S staining were used to verify the level of collagen and calcium deposition. TGF-β1 expression was determined by Western blotting. Realtime-PCR was used for determining TGF-β1, BMP2, Col1a1, and Col2a1 mRNA expression. Results·Compared with sham group, fibrotic area especially collagen Ⅰ , calcium deposition, TGF-β1 protein, and TGF-β1, BMP2, Col1a1, and Col2a1 mRNA expression in UUO+saline group significantly increased (all P<0.05). As compared with UUO+saline group, fibrotic area especially collagen Ⅰ, calcium deposition, TGF-β1 protein, and TGF-β1, BMP2, Col1a1, and Col2a1 mRNA expression in UUO+Insl6 group significantly decreased (all P<0.05). Conclusion·Insl6 inhibits UUO-induced renal fibrosis and calcification, which may be related to regulation of TGF-β1, collagen Ⅰ , BMP2 and collagen Ⅱ expression levels.
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OBJECTIVE: To investigate the antitumor effect of 16-dehydropregnenolone (16-DHP) liposomes. METHODS: Twelve kinds of tumor cells were used to determine the cytotoxic effect of 16-DHP liposome by MTT assay. The established tumor xenograft in nude mouse model was used to evaluate anti-tumor effect of 16-DHP liposomes after tail vein injection. RESULTS: IC50 value of 16-DHP liposomes to the human hepatoma cell HepG2, human oral carcinoma KB cell, human breast cancer T47D, human gastric cancer cell SGC7901, human fibrosarcoma cell HT1080, human ovarian cancer cell SKOV3, human prostate cancer cell PC3, human prostrate cancer cell DU145, human lung cancer cell A549, human rhabdomyosarcoma A204 cell and human cervical carcinoma cell HeLa were 44.69, 9.17, 26.22, 19.58, 28.01, 37.18, 24.58, 21.38, 54.69, 4.18 and 8.96 μg · mL-1, respectively. The relative tumor increment rate and inhibition rates of tumor weight were 93.7%, 60.52%, 37.84% and 23.05%, 48.84%, 69.70% respectively after treated with 16-DHP liposomes (7.5, 15 and 30 mg · kg-1 · d-1, 28 d). CONCLUSION: 16-DHP liposomes possess in vitro and in vivo anti-tumor activities.
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<p><b>OBJECTIVE</b>To explore the effectiveness of electro-acupuncture (EA) in the treatment of childhood autism (CA) and evaluate its effectiveness using single photon emission computed tomography (SPECT).</p><p><b>METHODS</b>A total of 55 CA patients (4.52±2.73 years) were enrolled in this study. All patients received EA treatments and were examined by SPECT before and after treatments.</p><p><b>RESULTS</b>Following treatment, the intracerebral multiple focal radioactivity distribution defect areas of CA patients were observed to be partially filled. Specifically, significant differences in the ratios of regional cerebral blood flow and global cerebral blood flow before (Fb) and after (Fe) EA treatment in different lesions were observed (in the left prefrontal cortex, t=5.01, P<0.01; in the right prefrontal cortex, t=2.32, P<0.05; in the left temporal lobe, t=4.54, P<0.01; in the right temporal lobe, t=2.90, P<0.05; in the left Broca's area, t=5.82, P<0.01). After EA treatment, the patients exhibited symptomatic relief.</p><p><b>CONCLUSION</b>EA is useful to treat CA and SPECT can be used to evaluate the effectiveness of this treatment.</p>
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Enfant , Humains , Trouble autistique , Imagerie diagnostique , Thérapeutique , Encéphale , Imagerie diagnostique , Anatomopathologie , Circulation cérébrovasculaire , Électroacupuncture , Imagerie tridimensionnelle , Tomographie par émission monophotonique , Méthodes , Résultat thérapeutiqueRésumé
<p><b>OBJECTIVE</b>To compare the clinical value of narrow band imaging (NBI) and iodine staining for margin determination of early esophageal cancer during endoscopic submucosal dissection (ESD).</p><p><b>METHODS</b>Clinical data of 87 patients with early esophageal cancers undergoing endoscopic submucosal dissection (ESD) were analyzed retrospectively. Patients were assigned to NBI group and iodine staining group according to the staining method before ESD operation. Clinicopathological features, esophageal spasm ratio, operation time, en bloc resection rate, complications, local recurrence, and distant metastases were compared between the two groups.</p><p><b>RESULTS</b>There were 37 patients in NBI group while 50 patients in iodine staining group. Location and size of the lesions between two groups were not significantly different. The ratio of moderate-severe esophageal spasm in NBI group was significantly lower as compared to iodine staining group [10.8%(4/37) vs. 32.0%(16/50), P<0.05]. The average operation time in NBI group was significantly shorter than that in iodine staining group [(42.2±19.5) min vs. (53.3±30.9) min, P<0.05). All the tumors were resected in an en bloc fashion and the R0 resection rate was 100%. Perforations in 2 patients and delayed bleeding in 1 patient were successfully treated by endoscopic methods. Esophageal strictures occurred in 3 patients of NBI group and 4 patients of iodine staining group, who were treated by endoscopic dilation and retrievable stents. During mean 13.2 months (range 4 to 20 months) follow-up periods, local recurrence occurred in 2 patients of NBI group and 2 patients of iodine staining group. These patients received ESD or other surgery.</p><p><b>CONCLUSION</b>Compared with iodine staining, using NBI for margin determination of early esophageal cancer during ESD is more convenient and fast because of distinctly lower degree of esophageal spasm.</p>
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Adulte , Sujet âgé , Femelle , Humains , Mâle , Adulte d'âge moyen , Tumeurs de l'oesophage , Anatomopathologie , Chirurgie générale , Oesophagoscopie , Méthodes , Iode , Imagerie à bande étroite , Études rétrospectives , Coloration et marquageRésumé
Objective To explore the impact of selective carotid artery hypothermia on cerebral edema and perfusion pressure after acute focal cerebral ischemia in rabbits.Methods Thirty-two male New Zealand white rabbits were randomly divided into middle cerebral artery occlusion (MCAO) group (n=8),MCAO+cold saline infusion groups (30 and 60 min perfusion subgroups,Ⅰ1 and I2 groups,n=8),MCAO+38 ℃ saline infusion group (Ⅰ3 group,n=8).Rectal temperature,heart rate,mean arterial pressure,blood gas (pH,PO2,PCO2) and glucose were detected 15 min before MCAO,and 3 and 4 h after surgery.Intracranial pressure and mean arterial pressure were measured to calculate the perfusion pressure before MCAO,and 1,3,6,12,24 and 48 h after surgery.The cerebral edema extent was measured with TTC staining 48 h after MCAO.Results Baseline data between groups balanced (all P>0.05).Cerebral perfusion pressure at different time points were significantly different (P<0.05); cerebral perfusion pressure within 3 h after MCAO continued to decrease,then maintained at a relatively stable level.There was significant difference of edema index between the groups (P<0.05); edema index in I2 group was significantly lower than that in the M and Ⅰ3 groups (P<0.05).Conclusion Selective carotid artery hypothermia for 60 min significantly reduces cerebral edema and increases cerebral perfusion pressure,which is condueive to the neuronal protection after MCAO.
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Background Chondroitin sulphate proteoglycans (CSPGs) can cause the termination of ocular dominance plasticity in the visual cortex.Recently,protein tyrosine phosphatase σ (PTPσ) has been identified as a receptor that inhibits CSPGs.However,whether PTPσ and its downstream molecules participate in the reactivation of ocular dominance plasticity in adult visual cortex has not been studied.Objective The present study was to investigate the changes in the expression of the PTPσ,probabilistic neural networks (PNNs),and molecules downstream of PNN,such as N-cadherin/β-catenin,after the reactivation of adult visual cortical plasticity.Methods Fifty-four SPF Long Evans rats were grouped according to different postnatal week (PW) as the PW1 (6 rats),PW3 (6 rats),PW5 (6 rats),PW7 (24 rats),and PW9 (12 rats) groups,and the upper and lower eyelids were sutured in the 12 rats from the PW7 group for 14 days to establish the binocular plasticity reactivation models.Expression of PTPσ and PNNs in the rat visual cortex was detected using immunochemistry,and changes of PTPσ mRNA,N-cadherin mRNA and β-catenin mRNA expression in the rat visual cortex with plasticity reactivation were assessed by real-time fluorescence quantitative PCR (RT Q-PCR).The use of animals followed the Regulations for the Administration of Affairs Concerning Experimental Animals by State Science and Technology Commission.Results The expression level of PTPσ mRNA was significantly higher in the PW9 group than that of the binocular plasticity reactivation models and the PW7 group (t =1.965,3.526,P<0.01).The staining of the rat visual cortex for PTPσwas localized to the cellular membrane,cytoplasm and axon.Cell densities of the PW9 group in the Ⅱ-Ⅲ layer,Ⅳ layer and Ⅴ-Ⅵ layer of the visual cortex were elevated in the PW9 rats compared with the PW7 rats (t =24.593,23.444,13.556,P<0.01) and rats from the binocular plasticity reactivation model (t =44.111,43.000,16.556,P<0.01).Cell densities for PNNs in the Ⅳ and Ⅴ-Ⅵ layers were significantly increased in the PW9 rats in comparison with the PW7 rats (t=1.926,P<0.01 ;t=1.370,P<0.05),but the cell density in the Ⅱ-Ⅱ layer has no statistical significance (t=0.889,P>0.05).However,cell densities for PNNs in the Ⅱ-Ⅲ and Ⅳ layers in the binocular plasticity reactivation models were lower than those of the PW9 rats (t =2.556,4.585,P<0.01).Compared with PW1 rats,the expression levels of the N-cadherin mRNA in the PW3,PW5,PW7,PW9 rats were lower (t =28.932,28.988,27.083,28.908,P<0.01),but those in the PW7 rats were enhanced in comparison with the PW3 rats,PW5 rats and PW9 rats (t =1.848,1.904,1.825,P<0.01).No significant difference was seen in the expression of the N-cadherin mRNA between the PW9 rats and rats from the binocular plasticity reactivation model (t =0.072,P>0.05).A statistically significant increase was found in the β-catenin mRNA expression in the PW1 rats compared with the PW3,PW5,PW7 and PW9 rats (t =3.918,3.534,2.645,4.652,P< 0.0 1),as well as between rats from the binocular plasticity reactivation model and the PW9 rats (t =0.570,P<0.01).Conclusions PTPr,PNNs and β-catenin are involved in the reactivation of ocular dominance plasticity in the adult visual cortex.
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Some cases of myeloproliferative disorders (MPD) could be transformed into acute myeloid leukemia (AML), but the cell differentiation process of MPD into AML has not yet been observed in vivo. This study was aimed to reveal this differentiation process. The flow cytometry was used to analyse the immunophenotype of differentiated cells of 2 MPD cases who developed into AML in a short time. The reports showed that the different MPD-AML subclones are presented when the MPD cells that proliferate slowly in vivo become the AML blast cells that proliferate rapidly. It is concluded that understanding the process of MPD crisis will help the MPD-AML early diagnosis and treatment.
Sujets)
Humains , Mâle , Adulte d'âge moyen , Transformation cellulaire néoplasique , Cytométrie en flux , Immunophénotypage , Leucémie aigüe myéloïde , Anatomopathologie , Syndromes myéloprolifératifs , AnatomopathologieRésumé
Somatic gene V617F mutation in JAK2 is a critical molecular and biological indicator to diagnosis of chronic myeloproliferative disease (MPD). This study was aimed to investigate the genetic background of V617F mutation in 46/1 gene haplotype in Chinese MPD patients, and the frequencies of 46/1 gene haplotype and V617F mutation in three nationalities of Chinese populations. Peripheral blood or bone marrow samples of 150 V617F mutation positive MPD patients, 123 V617F mutation negative MPD patients, 124 healthy Han individuals, 395 healthy Tibetan individuals and 315 healthy Yugu individuals were collected. The allele-specific multiplex PCR method was established, the presence or absence of V617F mutation, the presence or absence of 46/1 haplotype, and the relationship between V617F and 46/1 haplotype were easily identified by agarose gel image. The results showed that the V617F mutation located in the 46/1 haplotype of 88 cases (58.67) among 150 V617F-positive MPD cases. In 814 Chinese healthy individuals including Han, Tibetan, Yugu nationalities, the frequency of the 46/1 gene haplotype was 38.37 without difference in the frequency among different nationalities, and no V617F mutation was found in Chinese healthy populations, The frequency of the 46/1 gene haplotype was 43.09 in V617F mutation negative MPD patients and was 69.33 in V617F mutation positive MPD patients, the latter was obviously higher than former and than that in healthy Han individuals. In conclusion, a multiplex PCR method has been developed that is simple and useful to identify V617F mutation in JAK2 gene and its relationship to the 46/1 haplotype. In more than half of Chinese V617F-positive MPD patients, the V617F mutation locates in 46/1 haplotype in JAK2. The frequencies of 46/1 haplotype are statistically insignificant among Han, Tibetan and Yugu nationality populations.