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Abstract EphrinB2 plays a critical role in tumor growth. In this study, we studied the antitumor activity of imperatorin derivative IMP-1 in renal cell carcinoma (RCC) by regulating EphrinB2 pathway.. Results showed that IMP-1 inhibited the proliferation of 786-O cells in a dose- and time-dependent manner. More importantly, knockdown and transfection of EphrinB2 altered the inhibitory effect of IMP-1 on the activity of 786-O cells. IMP-1 arrested 786-O cell cycle at G0/G1 phase by decreasing the expression of cyclin D1 and cyclin E. Moreover, IMP-1 regulated Bcl-2 family proteins' expression, thus inducing apoptosis of 786-O cells. IMP-1 down-regulated the expression of EphrinB2, Syntenin1 and PICK1. Then, IMP-1 decreased the phosphorylation of Erk1/2 and AKT. In all, IMP-1 could regulate the EphrinB2 pathway in order to inhibit 786-O cell growth by arresting the cell cycle at G0/G1 phase and inducing cell apoptosis. Thus, IMP-1 may present as a potential strategy for RCC treatment.
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Carcinoma, Renal Cell/pathology , Neoplasms/classification , G1 Phase/genetics , Cyclin D1/adverse effects , Cyclin E/adverse effectsABSTRACT
@#Type 2 diabetes mellitus(T2DM)was a chronic,non-communicable disease with a combination of multiple genetic and environmental factors,of which the main characteristics included insufficient insulin secretion and insulin resistance.Insulin-like growth factor 2 mRNA binding protein 2(IGF2BP2/IMP2),an important insulin secretion-related protein in human body,is mainly expressed in tissues and cells such as pancreas,fat and intestine.It has been confirmed that IGF2BP2 can down-regulate the expression of IGF2 and the function damage of the related islet β cell is an important cause of T2DM and vascular complications.Therefore,IGF2BP2 gene can be used as an important predictor for diabetes mellitus risk.This paper reviews the correlation between IGF2BP2 gene and T2DM.
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Abstract The Interpersonal Mindfulness in Parenting (IM-P) scale is one of the first measures that specifically assesses mindful parenting, a specific application of mindfulness, that has been defined as paying attention to your child and parenting in a particular way, intentionally, in the present moment, and non-judgmentally. Psychometric properties of a Spanish-language version of the IM-P scale were examined in a sample of 111 mothers of preschool-age children living in Santiago, Chile. The original IM-P model with five factors and 31 items showed indicators of goodness of fit within acceptable ranges, however two items presented extremely low factor loadings that suggest a lack of fit to the model. Also, there was a high correlation between two factors which were theoretical and conceptually very related: Compassion for the self and child and Non-judgmental Acceptance of the self and child. Therefore, it was considered appropriate to test a new four-factor model in which these two factors were merged into one, and items loading low in the previous model were eliminated. This new model showed a slightly better fit than the five-factor model. The resultant four-factor version and its subscales showed good internal consistencies. Construct validity of the IM-P scale was investigated by calculating correlations with general mindfulness (Five Facet Mindfulness Questionnaire, FFMQ). As expected, a significant positive correlation was found between the two measures (r=0.73, p<0.01), and among almost all subscales. In general, the results present sound psychometric properties of the Spanish translation of the IM-P in Chilean mothers of preschool children.
Resumen Las propiedades psicométricas de la versión en español de la escala de Atención Plena (Mindfulness) Interpersonal en la Parentalidad (IM-P) fueron examinadas en una muestra de 111 madres de niños y niñas de edad preescolar en Santiago de Chile. La estructura de cinco factores de la escala IM-P original no fue completamente respaldada mediante análisis factorial confirmatorio. Por lo tanto, se testeó una estructura de cuatro factores. Dos de los factores encontrados fueron coherentes con aquellos originalmente hipotetizados. Los otros consistieron en una re-agrupación de items de las subescalas Consciencia Emocional de si misma y del hijo(a), Aceptación sin juicio de si misma y del hijo(a) y Compasión hacia si misma y hacia su hijo(a), en dos factores: uno que da cuenta de compasión y no-juicio de la madre hacia si misma y, el otro que da cuenta de la compasión, no-juicio y consciencia emocional de la madre hacia su hijio. La versión resultante de cuatro factores y sus sub-escalas presentaron buena consistencia interna. Se analizó la validez de constructo mediante cálculo de correlaciones con mindfulness general (Cuestionario de cinco dimensiones de Mindfulness, FFMQ). Como se esperaba, se encontró una correlación positiva significativa entre las dos medidas (r=0.71, p<0.01), y entre la mayor parte de las subescalas. En general, los resultados dan cuenta de buenas propiedades psicométricas de la versión en español de la escala IM-P en madres de niños y niñas preescolares en Chile.
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Pancreatic cancer (PC), a lethal condition with a poor prognosis, ranks fourth among the most common causes of cancer-related mortality as early diagnosis of PC is so tricky. Consequently, most cases at the time of initial diagnosis already harbor metastasis. PC cases' early detection and survival depend mainly on improving diagnostic approaches. This review sheds light on the role of endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) as a minimally invasive method in early PC diagnosis and differentiation between different pancreatic lesions. The discovery of new diagnostic and prognostic markers for PC will raise the accuracy of proper diagnosis, and in turn, patients will gain better survival and prognosis. Insulin-like growth factor II mRNA binding protein3 (IMP3) is overexpressed in several malignant tumors, including pancreatic cancer, which may raise its role in diagnosis and prognosis as well as its therapeutic benefit for PC.
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Humans , Male , Female , Pancreatic Neoplasms , DiagnosisABSTRACT
Objective: To explore the effect and mechanism of Wuzi Yanzong Fang (WZ) on proliferation of spermatogonial stem cells in aging rats by regulating miR-let-7-Imp axis.Method: A total of 40 18-month-old male SD rats were randomly divided into aging model group, and low, middle and high-dose WZ groups, with 10 rats in each group. Ten 2-month old rats were used as young control group. Low, middle and high-dose WZ groups were given by gastric WZ 0.4, 0.8, 1.6 g·kg-1 respectively. Young control group and aging model group were given normal saline for 4 months, which was suspended for 2 days every week. Rats were put to death after the final treatment with WZ, and then the testes were quickly removed from rats. The relative mRNA expression levels of miR-let-7 and Imp were detected by Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR). The expressions and localization of p-JAK2/JAK2, phosphate(p)-signal transduction and transcriptional activators3 (STAT3)/STAT3 signaling pathway proteins were detected by Western blot and immunofluorescence. The numbers of spermatogonial stem cells and the expression levels of proliferating cell nuclear antigen (PCNA) were detected by immunofluorescence. The testicular tissue morphology was observed using htoxylin eosin (HE) staining.Result: Compared with young control group, the expression levels of miR-let-7 mRNA were significantly increased, while the expression levels of Imp mRNA were decreased in the aging model group(PPPPPPPConclusion: WZ effectively promote the proliferation of spermatogonial stem cells by regulating miR-let-7-imp axis in testis.
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Objective To upgrade No.1 Military Medical Project database from Oracle 8.17 to Oracle 11g so as to solve the problems of server overloading and client terminal failing to connect to the server due to excessive concurrent databases. Methods Exp/Imp and Toad tools of the database were used to generate and modify the upgrade statements as well as to import and export database data,so that the inter-platform and-version database upgrade could be carried out.Results The database was upgraded and the system's operation speed was enhanced greatly.Conclusion The upgrade scheme has easy operation,short time consumed,zero data loss and high reliability,and thus is worthy promoting in medium-and small-scale hospitals.
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Purpose To investigate the expression of insulin-like growth factor Ⅱ mRNA-binding protein 3 (IMP3) and its differential diagnostic significance in benign and malignant thyroid tumor. Methods The fluorescent quantitative PCR and immunohistochemical staining were used to detect the IMP3 expression in 71 cases of thyroid tissue of different pathological types. The differential diagnostic significance of IMP3 expression in benign and malignant thyroid tumor was analyzed. Results Compared with normal thyroid tissue, thyroid tumors including follicular variant of papillary thyroid carcinoma (FVPTC ), follicular thyroid carcinoma (FTC), papillary thyroid carcinoma(PTC), nodular goiter (NG), and follicular adenoma (FA) had significantly higher IMP3 mRNA expression levels with10.13, 8.81, 8.52, 2.46, and 1.49 holds, respectively. The positive expression rate of IMP3 protein in thyroid tumors were significantly higher, with the positive rate from high to low was FTC (100％ ), PTC (96.77％ ), FVPTC (90％ ), FA(20％ ), and NG (0). The expression level of IMP3 protein was positively correlated with the expression of mRNA (P＜0.01). The IMP3 expression level of malignant thyroid tumor(8.82 holds) was significantly higher than that of benign thyroid tumor (1.94 holds) (P＜0.01). The IMP3 expression level of malignant thyroid follicular lesions (9.36 holds) was higher than that of benign thyroid follicular lesions (1.49 holds) (P＜0.01). Conclusion IMP3 may be an effective and useful molecular maker for diagnosis of benign and malignant thyroid neoplasms, as well as the differential diagnosis between benign and malignant thyroid follicular lesions.
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Objective To investigate the post-transcriptional regulation mechanism of insulin-like growth factor 2 (IGF2),which is an important tumor regulator,by SIRT6. Methods SIRT6 was overexpressed in 293T cells and IP was used to enrich SIRT6 and mass spectrometry(MS)was used to detect the protein that interacted with SIRT6. Western blot was used to validate the interacted protein and its acetylation/phosphorylation modification status. Results SIRT6 did not change the acetylation modification status of IMP1,but the phosphorylation status of IMP1 was elevated in the presence of SIRT6. Conclusions SIRT6 may regulate IGF2 though promoting the phosphoryla-tion of IMP1 in 293T cells.
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Objective To investigate the resistance mechanism of Carbapenem-Resistant Klebsiella oxytoca.Methods Car-bapenem-Resistant Klebsiellaoxytoca were collected from Fujian Medical University Union Hospital.The modified hodge test (MHT)was used for carbapenemase phenotype screening.The minimum inhibit concentration(MIC)was detected using agar dilution method for 1 7 drugs.PCR and DNA sequencing were used to detect commonβ-Lactamase genes and carbapene-mases genes.Conj ugation experiments demonstrated the transferability of the carbapenem-resistant determinants.Results 5 Carbapenem-Resistant Klebsiella oxytoca of 4 isolates were positive detected by MHT.Minimum inhibit concentration was detected by using agar dilution method for 17 drugs.More than 80% isolates were resistance to nine drugs.2 isolates conju-gated successfully of 5 Carbapenem-Resistant Klebsiella oxytoca Isolates.There were 2 isolates included carbapenemases gene (1 isolates were only IMP producers,1 isolate contained the IMP and KPC),3 isolates produce ESBLs gene.Conclution The due to CRE strains isolated from Fujian Medical University Union Hospital may be metallo-enzyme carbapenemase and KPC gene.And the isolate that produce two Carbapenem-Resistant gene had been found in this hospital.
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Objective To investigate serum anti-insulin-like growth factor-Ⅱ mRNA binding protein1(IMP1) autoantibody IgG expression in hepatocellular carcinoma(HCC) patient and its relationship with clinicopathological parameters.Methods ELISA method was used to detect serum anti-IMP1 autoantibody IgG in 120 cases of HCC,then the detection results were compared those in 115 healthy individuals(control group).The relationship between serum anti-IMP1 autoantibody IgG level with clinicopathological parameters in HCC patients was analyzed.Results The serum anti-IMP1 autoantibody IgG levels in the HCC group and control group were(1.512±0.685),(1.080±0.301)μg/mL respectively,the HCC group was significantly higher than the control group with statistical difference(P0.05).Conclusion Serum anti-IMP1 autoantibody IgG expression increased is increased in HCC patient.The detection of serum anti-IgG autoantibody IMP1 level in HCC is conducive to judge the malignancy degree of HCC.
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BACKGROUND: Carbapenem-resistant Enterobacteriaceae (CRE) with acquired metallo β-lactamase (MBL) resistance have been increasingly reported worldwide and associated with significant mortality and morbidity. Here, an outbreak of genetically related strains of Klebsiella pneumoniae producing the imipenemase (IMP)-1 MBL in a medical intensive care unit (MICU) in Korea is reported. METHODS: Since isolating carbapenem-resistant K. pneumoniae (CRKP) at the MICU of the hospital on August 10, 2011, surveillance cultures for CRE in 31 hospitalized patients were performed from August to September 2011. Carbapenem resistance was determined based on the disk diffusion method outlined in the Clinical and Laboratory Standards Institute guidelines. Polymerase chain reaction (PCR) was performed for genes coding for β-lactamase. Associations among isolates were assessed via pulsed-field gel electrophoresis (PFGE). In addition, a surveillance study of environmental cultures and health-care workers (HCWs) was conducted in the MICU during the same time frame. RESULTS: During the study period, non-duplicated CRKP specimens were discovered in four patients in the MICU, suggestive of an outbreak. On August 10, 2011, CRKP was isolated from the sputum of a 79-year-old male patient who was admitted to the MICU. A surveillance study to detect additional CRE carriers by rectal swab revealed an additional three CRKP isolates. PCR and sequencing of the four isolates identified the presence of the IMP-1 gene. In addition, PFGE showed that the four isolated strains were genetically related. CRE was not identified in specimens taken from the hands of HCWs or other environmental sources during surveillance following the outbreak. Transmission of the carbapenemase-producing Enterobacteriaceae strain was controlled by isolation of the patients and strict contact precautions. CONCLUSIONS: This study shows that rapid and systemic detection of CRE and strict infection controls are important steps in preventing nosocomial transmission.
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Aged , Humans , Male , Clinical Coding , Critical Care , Diffusion , Disease Outbreaks , Drug Resistance, Bacterial , Electrophoresis, Gel, Pulsed-Field , Enterobacteriaceae , Hand , Infection Control , Intensive Care Units , Klebsiella pneumoniae , Klebsiella , Korea , Methods , Mortality , Pneumonia , Polymerase Chain Reaction , SputumABSTRACT
Objective To investigate the expression of insulin-like growth factor Ⅱ mRNA binding protein 3 (IMP3) in non-muscle invasive bladder cancer and its relationship with the tumor recurrence and progression.Methods IMP3 protein expression was detected by immunohistochemistry in 130 cases of nonmuscle invasive bladder cancer specimens who underwent transurethral resection the first time at Beijing Chao-Yang hospital,from October 2010 to October 2013.Besides,we analyzed 20 cases of muscle-invasive samples and 20 benign tissues adjacent to cancer as control.The 130 patients were followed up by telephone and other methods.According to the UICC-TNM standard.Survival analysis was calculated by using the Kaplan-Meier method,and the difference in survival curves was analyzed by using the log-rank test.For multiple analyses,The Cox proportional hazards regression model was used.Results The positive expression rate of IMP3 in 130 patients with non-muscle invasive bladder cancer was 59.2％ (77/130),of which 30.0％ (39/130) was weak expression,29.2％ (38/130) was strong.However there was 80.0％ (16/20) in muscle-invasive specimens,of which 20.0％ (4/20) was weak,60.0％ (12/20) was strong (P =0.011).IMP3 was not detected in all benign tissues adjacent to cancer (P ＜0.001).All the 130 patients were followed-up for 5 to 69 mnonths,45 cases experienced disease recurrence,20 patients had progressed and 12 cases died.IMP3 expression was significantly related to higher tumor stage (P ＜ 0.001),high tumor grade (P =0.014),and tumor recurrence (P =0.003).Kaplan-Meier plots and log-rank tests showed that patients with IMP3-positive tumors had a lower disease-free survival (P =0.002) and progression-free survival rate (P =0.010) than those with IMP3-negative tumors.In the multivariable Cox analysis,we found that IMP3 protein was an independent predictor of disease-free survival (P =0.010) in non-muscle invasive urothelial carcinoma of bladder.Conclusions IMP3 was not expressed in benign tissue adjacent to cancer,whereas highly expressed in bladder cancer,and high IMP3 expression is an independent prognostic factor in NMIBC that can identify the patients with a high potential to relapse.
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The natural compound thymoquinone, extracted from(black cumin), is widely used in humans for its anti-oxidative properties. Thymoquinone is known for its acute endothelium-independent vasodilator effects in isolated rat aortae and pulmonary arteries, depending in part on activation of adenosine triphosphate-sensitive potassium channels and inhibition of voltage-dependent calcium channels. The compound also improves endothelial dysfunction in mesenteric arteries of ageing rodents and in aortae of rabbits treated with pyrogallol, by inhibiting oxidative stress. Serendipitously, thymoquinone was found to augment contractions in isolated arteries with endothelium of both rats and pigs. The endothelium-dependent augmentation it causes counterintuitively depends on biased activation of soluble guanylyl cyclase (sGC) producing inosine 3',5'-cyclic monophosphate (cyclic IMP) rather than guanosine 3',5'-cyclic monophosphate. This phenomenon shows a striking mechanistic similarity to the hypoxic augmentation previously observed in porcine coronary arteries. The cyclic IMP preferentially produced under thymoquinone exposure causes an increased contractility of arterial smooth muscle by interfering with calcium homeostasis. This brief review summarizes the vascular pharmacology of thymoquinone, focussing in particular on how the compound causes endothelium-dependent contractions by biasing the activity of sGC.
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BACKGROUND: Carbapenem-resistant Enterobacteriaceae (CRE) with acquired metallo β-lactamase (MBL) resistance have been increasingly reported worldwide and associated with significant mortality and morbidity. Here, an outbreak of genetically related strains of Klebsiella pneumoniae producing the imipenemase (IMP)-1 MBL in a medical intensive care unit (MICU) in Korea is reported. METHODS: Since isolating carbapenem-resistant K. pneumoniae (CRKP) at the MICU of the hospital on August 10, 2011, surveillance cultures for CRE in 31 hospitalized patients were performed from August to September 2011. Carbapenem resistance was determined based on the disk diffusion method outlined in the Clinical and Laboratory Standards Institute guidelines. Polymerase chain reaction (PCR) was performed for genes coding for β-lactamase. Associations among isolates were assessed via pulsed-field gel electrophoresis (PFGE). In addition, a surveillance study of environmental cultures and health-care workers (HCWs) was conducted in the MICU during the same time frame. RESULTS: During the study period, non-duplicated CRKP specimens were discovered in four patients in the MICU, suggestive of an outbreak. On August 10, 2011, CRKP was isolated from the sputum of a 79-year-old male patient who was admitted to the MICU. A surveillance study to detect additional CRE carriers by rectal swab revealed an additional three CRKP isolates. PCR and sequencing of the four isolates identified the presence of the IMP-1 gene. In addition, PFGE showed that the four isolated strains were genetically related. CRE was not identified in specimens taken from the hands of HCWs or other environmental sources during surveillance following the outbreak. Transmission of the carbapenemase-producing Enterobacteriaceae strain was controlled by isolation of the patients and strict contact precautions. CONCLUSIONS: This study shows that rapid and systemic detection of CRE and strict infection controls are important steps in preventing nosocomial transmission.
Subject(s)
Aged , Humans , Male , Clinical Coding , Critical Care , Diffusion , Disease Outbreaks , Drug Resistance, Bacterial , Electrophoresis, Gel, Pulsed-Field , Enterobacteriaceae , Hand , Infection Control , Intensive Care Units , Klebsiella pneumoniae , Klebsiella , Korea , Methods , Mortality , Pneumonia , Polymerase Chain Reaction , SputumABSTRACT
Objective To investigate the neuroprotective effects and mechanisms of 5-aminoimidazole-4-carboxamide ribonucleotide formyltransferase/ IMP cyclohydrolase(AICAR) supplement (AMPK activator) in different stages of neonatal rats sufferring from hypoxia-ischemia encephalopathy ( HIE). Methods Neonatal rat hypoxia-ischemia brain injury model was employed in this study. A total of 160 neonatal rats were distributed into five groups: sham, model control,AICAR30 min, AICAR24 h and AICAR72 h. The neuroprotective effects of AICAR supplement (30 min, 24 h, 72 h post operation) were compared by cresyl violet staining; Expressions of P-AMPK,AMPK in the brain tissue were measured by Western blotting.Foot-faults method was used to evaluate the long-term prognosis of the rats. Results Compared with the sham group, the survival of rats brain in model control group was significantly decreased [(100.0± 0.1)% and (45.3± 6.3)%, P0.05). Compared with the sham group, the expression of P-AMPK significantly increased about three times, while ATP level decreased close to the same. Conclusion Early AICAR treatment can protect hypoxia-ischemia brain injury by increasing AMPK-ATP level.
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Objective To investigate the mechanism of carbapenem-resistant in Enterobacteriaceae strains isolated from Fuyang First People′s Hospital and to analyze their epidemiological features. Methods The Enterobacteriaceae strains with reduced ertapenem susceptibility were isolated from the Fuy-ang First People′s Hospital during January 2013 to August 2014.K-B disk diffusion and E-test were per-formed to detect the antimicrobial susceptibilities of those strains.The modified Hodge test, ethylenediami-netetraacetic acid ( EDTA) disk synergy test and extended-spectrumβ-lactamases ( ESBLs) confirmation test were used to screen out the carbapenem-resistant phenotypes.PCR analysis and gene sequencing were used to analyze drug resistance genes, genetic structures surrounding the blaKPC-2 gene and seven house-keeping genes of Klebsiella pneumonia ( K.pneumoniae) strains.The sequences of the seven house-keeping genes were analyzed with multilocus sequence typing ( MLST) .Pulsed field gel electrophoresis ( PFGE) was per-formed for homology analysis within the same species.S1-PFGE in combination with Southern blot analysis was used to determine the location of carbapenem resistance genes.Results A total of 19 Enterobacteriace-ae isolates with reduced susceptibility to ertapenem were screened out.Each of them was resistant to multiple antibiotics and harbored several resistance genes.Seven genes including the blaKPC-2 , blaIMP-4 , blaSHV-1 , blaCTX-M-65 , blaCTX-M-15 , blaTEM-1 and rmtB genes were the prevalent drug resistance genes.Fourteen out of the nineteen strains were identified as K.pneumoniae strains, mainly belonged to the ST11 type according to the results of MLST.Among the nineteen strains, eleven K.pneumoniae isolates and one Escherichia coli isolate carried the blaKPC-2 gene, located on plasmids varying in size (95 kb, 140 kb, 200 kb and 240 kb) .The ge-netic structures of all isolates were ISKpn8, blaKPC-2 and ISKpn6-like from upstream to downstream.The blaIMP-4 gene was detected in one Klebsiella oxytoca isolate and one K.pneumoniae isolate, located on a plas-mid about 300 kb in size.Conclusion Carbapenemases KPC-2 and IMP-4 were closely related to the car-bapenem resistance in carbapenem-resistant Enterobacteriaceae strains isolated form the Fuyang First People′s Hospital.No predominant clone was found in those carbapenem-resistant K.pneumoniae isolates.
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Objective To subclone express and identify the immune mapped protein 1 IMP1 which encodes a surface an?tigen of Toxoplasma gondii. Methods The cDNA of T. gondii RH strain was synthesized by reverse transcription PCR the IMP1 open reading frame ORF was amplified by PCR using the T. gondii RH strain cDNA as template the PCR products were identified by TA?cloning and sequencing then the IMP1 ORF was subcloned into the NdeⅠand Xho I sites of the vector pET28b and the positive recombinant pET28b?IMP1 was identified by double?digesting and sequencing. The protein of 6 × His tagged IMP1 was inducibly expressed in E. coli strain BL21 DE3 with isopropylβ?D?1?thiogalactopyranoside IPTG and the induction time concentration of IPTG and temperature gradients to optimize protein expression conditions were determined. After the cells carried IMP1 were induced by the optimized conditions and harvested the resulting bacteria were suspended in resuspension buffer and lysed by sonication and the supernatants were loaded onto the Ni2+Chelating Sepharose Fast Flow col?umn for affinity chromatography of the N?terminal 6 × His tagged IMP1 protein. Finally the fusion IMP1 proteins were identified by Western blotting. Results The ORF sequence of IMP1 was successfully subcloned from the cDNA of Toxoplasma Gondii RH strain and the amplified product was sequenced and identified based on which the IMP1 ORF gene was inserted into the prokaryotic expression vector pET28b and the recombinant pET28b?IMP1 was constructed successfully. The double?digesting and sequencing results indicated the validity of the recombinant vector. And the optimized conditions for the expression of IMP 1 was determined namely 0.3 mmol/L IPTG induction for 9 h at 20℃. Furthermore IMP1 protein was expressed solubly and che?lated on Ni2+sepharose beads with high affinity thus this protein could be purified efficiently by affinity chromatography. The pure fusion protein was confirmed with fine immunocompetence by SDS?PAGE and Western blotting. Conclusions IMP1 pro? tein can be high efficiently expressed by the E. coli prokaryotic expression systems the protein of IMP1 is soluble and has stable characters. The study may lay a useful foundation for the following works including in vivo expression of IMP1 crystal structure study of IMP1 and anti?toxoplasmosis subunit vaccine development.
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Objective To investigate the detection of IMP andVIM metallo-β-lactamases (MβLs)genes in clinically iso-lated gram-negative bacteria as well as bacterial resistance toβ-lactam antimicrobial agents.Methods 113 clinically isolated bacteria were performed antimicrobial susceptibility testing by Kirby-Bauer method ,drug-resistant genes IMP and VIM were detected by polymerase chain reaction (PCR),PCR products were sequenced and aligned with BLAST software. Results VIM gene was detected in 1 Pseudomonas fluorescens strain ,IMP gene was detected in 15 strains ,they were Klebsiella pneumoniae (n=6),Acinetobacter baumannii (n=3),Escherichia coli (n=2),Ralstonia picket-tii (n=1),Pseudomonas aeruginosa (n=1 ),Citrobacter amalonaticua (n=1 ),and Enterobacter cloacae (n=1 ). BLAST results showed that VIM gene was VIM-2 subtype,similarity with gene bank was 99%;all IMP genes were IMP-1 subtype,which were highly homologous ,similarity was 98%-99%.Resistant rates of IMP positive strains to ceftriaxone,cefotaxime,cefoxitin,aztreonam and imipenem were all significantly higher than negative strains (all P <0.05).Conclusion IMP genes of different strains are highly homologous,all are IMP-1 type,indi-cating that IMP genes are highly transmissible and can spread among different species of bacteria.IMP genes are related with resistance ofβ-lactam antimicrobial agents.
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Objective:To evaluate the expression of IMP3 and CD44 proteins in recurrent urothelial carcinoma (UC) and to deter-mine the correlation between the two proteins. Methods: Data from transurethral resection of bladder (TURB) cancer cases between January 2002 and December 2012 were reviewed. Of the 54 UC recurrent cases in this study, one group of 25 had experienced recur-rence within 6 months after surgery, and the other group of 29 had their first recurrence after more than 3 years. IMP3 and CD44 immu-noreactivities were increased, which correlated with the clinicopathologic parameters. The relationship between IMP3 and CD44 pro-tein expressions was also explored. Results:Six of the 25 short-term recurrent UC cases were tested positive for IMP3 and all belonged to high-grade UC. Among the 29 long-term recurrent patients, only one case of low-grade UC tested positive for IMP3. IMP3 expres-sion rate [24%(6/25)] and intensity [weak staining at 16%(4/25) and strong staining at 8%(2/25)] were higher in the short-term recur-rent group than those in the long-term group, which had an expression rate of 3.45% (1/29) and intensity rates for weak staining at 3.45%(1/29) and without strong staining (0/29). No difference was observed in the CD44 expression between the two groups. In addi-tion, the high expression of IMP3 correlated with higher tumor stage and grade, whereas the CD44 expression tended to be inversely correlated with the tumor grade in recurrent UC patients. Furthermore, no correlation existed between the expression of IMP3 and CD44 proteins in the bladder carcinoma specimens. Conclusion:IMP3 exhibited a significantly higher expression rate in short-term re-current UC specimens than in the long-term recurrent cases. Therefore, IMP3 could be used as a novel marker, together with the other factors including tumor stage and grade, for predicting the high risk of short-term recurrence in UC patients who underwent TURB.
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Purpose To detect the expression of insulin-like growth factor-ⅡmRNA-binding protein 3 (IMP3) in preeclampsia (PE) placentas. Methods The levels of IMP3 expression were measured using immunohistochemistry in 8 cases of mild PE, 41 cases of se-vere PE, 6 cases of fetal growth restrict ( FGR) without PE and 22 cases of normal late trimester of pregnancy placentas. Results Compared with normal late trimester of pregnancy, the expression of IMP3 was obviously decreased in severe PE placenta ( Z =-2. 063,P0. 05). The expression of IMP3 in severe PE placenta was lower than that of mild PE placenta but not statistically significant (Z= -0. 233,P>0. 05). The expression of IMP3 in early onset PE placenta was lower than that of late onset PE placenta but not statistically significant(Z= -0. 108,P>0. 05). Compared with normal late tri-mester of pregnancy, the expression of IMP3 was significantly decreased in PE with FGR placenta (Z= -2. 375,P 0. 05, Z= -1. 36,P>0. 05). Conclusion The results indicate that IMP3 protein expression is low in sever PE, which may be one of the pathogenesis of PE. IMP3 may be used as a marker to predict PE with FGR, and to provide a basis for the development of a novel therapeutic target in PE.