ABSTRACT
ObjectiveTo observe the effects of Aurantii Fructus Immaturus， Atractylodis Macrocephalae Rhizoma， and their combination on slow transit constipation via PTEN-induced putative kinase 1 （PINK1）/Parkin pathway-mediated mitophagy. MethodFifty-six male SD rats were randomly assigned into normal group， model group， natural recovery group， Aurantii Fructus Immaturus group， Atractylodis Macrocephalae Rhizoma group， Aurantii Fructus Immaturus combined with Atractylodis Macrocephalae Rhizoma group， and mosapride group， with 8 rats in each group. Slow transit constipation model was established by gavage with loperamide （3 mg·kg-1·d-1） for 14 days in other groups except the normal group. After successful modeling， except that the model group was continuously induced by loperamide， the normal group and the natural recovery group were administrated with 0.9% normal saline by gavage， and the rats in the Aurantii Fructus Immaturus （1.35 g·kg-1·d-1） group， the Atractylodis Macrocephalae Rhizoma （2.7 g·kg-1·d-1） group， the Aurantii Fructus Immaturus combined with Atractylodis Macrocephalae Rhizoma （4.05 g·kg-1·d-1） group， and the mosapride （1.56 mg·kg-1·d-1） group were administrated with corresponding drugs by gavage for 7 days. The amount of feces， fecal water content， and intestinal propulsion rate of rats were determined. The pathological changes of the colon were evaluated by hematoxylin-eosin （HE） staining and Alcian blue-periodic acid-Schiff （AB-PAS） staining. The activity of respiratory chain complex and the ultrastructure of the colon tissue were determined by ultraviolet spectrophotometry and observed by transmission electron microscopy， respectively. Real-time fluorescence quantitative polymerase chain reaction（Real-time PCR） was employed to determine the mRNA levels of PINK1， Parkin， and p62， and Western blot to determine the protein levels of microtubule-associated protein 1 light chain 3 （LC3）， PINK1， and Parkin. ResultCompared with the normal group， the model group and the natural recovery group showed decreases in the amount of feces， fecal water content， intestinal propulsion rate （P<0.05，P<0.01）， and activities of mitochondrial respiratory chain complexes Ⅱ， Ⅲ， and Ⅳ in the colon tissue （P<0.05，P<0.01）. Further， the mRNA levels of PINK1 and Parkin and the protein levels of PINK1， Parkin， and LC3 were up-regulated （P<0.01） and the mRNA level of p62 was down-regulated in the model group （P<0.05） and the natural recovery group. Compared with the model group and the natural recovery group， the Aurantii Fructus Immaturus combined with Atractylodis Macrocephalae Rhizoma group showed increased amount of feces， fecal water content， intestinal propulsion rate， and activities of mitochondrial respiratory chain complexes Ⅱ， Ⅲ， and Ⅳ （P<0.05，P<0.01）. Moreover， the combination meliorated the degree of mitochondrial swelling in the colon tissue， down-regulated the mRNA levels of PINK1 and Parkin and the protein levels of PINK1， Parkin， and LC3 （P<0.05，P<0.01）， and up-regulated the mRNA level of p62 （P<0.05）. ConclusionAurantii Fructus Immaturus and Atractylodis Macrocephalae Rhizoma， and their combination may remedy the colonic motility disorders in rats with slow transit constipation by blocking PINK1/Parkin signaling pathway to inhibit the excessive mitophagy in interstitial cells of Cajal in the colon tissue.
ABSTRACT
Objective:To analyze the different clinicopathological features of intrahepatic cholangiocarcinoma with and without viral hepatitis.Methods:The clinicopathological data of 79 intrahepatic cholangiocarcinoma cases from Mar 2012 to Sep 2018 at Henan Provincial People's Hospital were retrospectively analyzed.Results:Twenty-five of the 79 patients with intrahepatic cholangiocarcinoma were accompanied by viral hepatitis. Those with viral hepatitis had a lower mean age at onset than those without [(53±11) years vs. (60±11) years, P=0.011], higher proportion of male patients (80% vs. 52%, P=0.017), higher AFP positive rate (40% vs. 19%, P=0.041), lower CA19-9 positive rate (48% vs. 72%, P=0.036), tend to occur in the right liver lobe (76% vs. 44%, P=0.009), a lower rate of bile duct invasion (16% vs. 41%, P=0.03), and were more likely to be mass type (mass type proportion 96% vs. 72%, P=0.032). Conclusions:Viral hepatitis is common in intrahepatic cholangiocarcinoma. Intrahepatic cholangiocarcinoma with and without viral hepatitis differ in clinicopathology. Intrahepatic cholangiocarcinoma with viral hepatitis is more likely to have the characteristics of hepatocellular carcinoma, while intrahepatic cholangiocarcinoma without viral hepatitis is more likely to have the characteristics of cholangiocarcinoma.
ABSTRACT
Objective: To isolate and purify a bacteriophage against methicillin-resistant Staphylococcus aureus (MRSA), and to analyze its genomic information and biological characteristics. Methods: The experimental research methods were adopted. MRSA (hereinafter referred to as host bacteria) solution was collected from the wound of a 63-year-old female patient with the median sternum incision infection admitted to the Second Affiliated Hospital of Army Medical University (the Third Military Medical University). The bacteriophage, named bacteriophage SAP23 was isolated and purified from the sewage of the Hospital by sewage co-culture method and double-layer agar plate method, and the plaque morphology was observed. The morphology of bacteriophage SAP23 was observed by transmission electron microscope after phosphotungstic acid negative staining. The whole genome of bacteriophage SAP23 was sequenced with NovaSeq PE15 platform after its DNA was prepared by sodium dodecyl sulfonate/protease cleavage scheme, and genomic analysis including sequence assembly, annotation, and phylogenetic tree were completed. The bacteriophage SAP23 solution was co-incubated with the host bacterial solution for 4 h at the multiplicity of infection (MOI) of 10.000 0, 1.000 0, 0.100 0, 0.010 0, 0.001 0, and 0.000 1, respectively, and then the bacteriophage titer was measured by the drip plate method to select the optimal MOI, with here and the following sample numbers of 3. The bacteriophage SAP23 solution was co-incubated with the host bacterial solution at the optimal MOI for 5, 10, and 15 min, respectively, and the bacteriophage titer was measured by the same method as mentioned above to select the optimal adsorption time. After the bacteriophage SAP23 solution was co-incubated with the host bacterial solution at the optimal MOI for the optimal adsorption time, the bacteriophage titers were measured by the same method as mentioned above at 0 (immediately), 5, 10, 15, 20, 30, 40, 50, 60, 80, 100, and 120 min after culture, respectively, and a one-step growth curve was drawn. The bacteriophage SAP23 solution was incubated at 4, 37, 50, 60, 70, and 80 ℃ and pH 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 for 1 h, respectively, to determine its stability. A total of 41 MRSA strains stored in the Department of Microbiology of Army Medical University (the Third Military Medical University) were used to determine the host spectrum of bacteriophage SAP23. Results: The bacteriophage SAP23 could form a transparent plaque on the host bacteria double-layer agar plate. The bacteriophage SAP23 has a polyhedral head with (88±4) nm in diameter and a tail with (279±21) nm in length and (22.6±2.6) nm in width. The bacteriophage SAP23 has a linear, double-stranded DNA with a full length of 151 618 bp and 11 681 bp long terminal repeats sequence in the sequence ends. There were 220 open reading frames predicted and the bacteriophage could encode 4 transfer RNAs, while no resistance genes or virulence factors were found. The annotation function of bacteriophage SAP23 genes could be divided into 5 groups. The GenBank accession number was MZ427930. According to the genomic collinearity analysis, there were 5 local collinear blocks in the whole genome between the bacteriophage SAP23 and the chosen 6 Staphylococcus bacteriophages, while within or outside the local collinear region, there were still some differences. The bacteriophage SAP23 belonged to the Herelleviridae family, Twortvirinae subfamily, and Kayvirus genus. The optimal MOI of bacteriophage SAP23 was 0.010 0, and the optimal adsorption time was 10 min. The bacteriophage SAP23 had a latent period of 20 min, and a growth phase of 80 min. The bacteriophage SAP23 was able to remain stable at the temperature between 4 and 37 ℃ and at the pH values between 4 and 9. The bacteriophage SAP23 could lyse 3 of the 41 tested MRSA strains. Conclusions: The bacteriophage SAP23 is a member of the Herelleviridae family, Twortvirinae subfamily, and Kayvirus genus. The bacteriophage SAP23 has a good tolerance for temperature and acid-base and a short latent period, and can lyse MRSA effectively. The bacteriophage SAP23 is a new type of potent narrow-spectrum bacteriophage without virulence factors and resistance genes.
Subject(s)
Humans , Middle Aged , Bacteriophages/genetics , Genomics , Methicillin-Resistant Staphylococcus aureus/genetics , Phylogeny , SternumABSTRACT
Objective To investigate the prevalence of thyroid nodules in women participating in physical examination in Beijing and analyze the influencing factors. Methods The data of physical examination (height, weight, blood pressure, blood glucose, etc.) and questionnaire survey (activity intensity, eating habits, etc.) of women in Beijing in 2016 were collected, and the influencing factors of thyroid nodules were analyzed by multivariate logistic regression. Results A total of 4 732 women were included in this study. The prevalence of thyroid nodules was 49.6%. Multivariate logistic regression analysis showed that compared with women aged 18-29 years, OR value was 1.769 (95% CI =1.489 ~ 2.102) for women aged 30 ~ 59 years, and OR value was 4.716 (95% CI = 3.577- 6.216) for women aged 60 years and over. Compared with the balanced diet, the OR value was1.237（95%CI=1.056-1.450）for vegetarian diet. Compared with the normal weight, the OR value was 1.331（95%CI=1.153-1.537）for the overweight. Compared with the healthy women, the OR value was 1.405 （95%CI=1.146-1.723）for hypertension, the OR value was 1.184（95%CI=1.040-1.347）for hyperlipidemia, and the OR value was 1.779（95%CI=1.178-2.687）for diabetes, while the OR value was 1.183（95%CI=1.018-1.376）for women with mammary gland nodules, and the OR value was 1.376（95%CI=1.201-1.575）for women with uterine leiomyoma. Compared with the education degree of high school, technical secondary school, technical school and below, the OR value was 0.648（95%CI=0.522-0.806）for college or undergraduate, and the OR value was 0.564（95%CI=0.440-0.723）for graduate students and above. Conclusion The prevalence of thyroid nodules in women in Beijing is at a high level. Age, vegetarian diet, overweight, hypertension, hyperlipidemia, diabetes, mammary gland nodules and uterine leiomyoma are risk factors for thyroid nodules. Education level is a protective factor for the prevalence of thyroid nodules.
ABSTRACT
Objective:To observe the effect of Rhei Radix et Rhizoma and Persicae Semen on inflammatory cytokines and intestinal mucosal barrier in rats with postoperative adhesive intestinal obstruction, and to explore its mechanism. Methods:Sixty SD rats were randomly divided into normal group, sham operation group, model group, low, medium and high dose of Rhei Radix et Rhizoma and Persicae Semen group. Except for the normal group and the sham operation group, and the other animals groups were established the model of postoperative adhesive intestinal obstruction. Rhei Radix et Rhizoma and Persicae Semen low, medium and high dose groups were perfused with Rhei Radix et Rhizoma and Persicae Semen decoction with the concentration of 0.2, 0.6 and 1.8 g/ml, the normal group, sham operation group and model group were gavaged with equal volume of sterile saline from the first day after the operation, once a day. After corresponding treatment, the adhesion score was observed on the 7th day after the operation, the contents of interleukin-1 β (IL-1β), D-lactic acid (D-LA), diamine oxidase (DAO) and vascular endotoxin (ET) in serum were detected by ELISA method, and the expression of SIgA, CD4 +T and CD8 +T cells in intestinal mucosa were assessed by immunohistochemical method. Results:Compared to the model group, the adhesion score in the low, medium and high dose of Rhei Radix et Rhizoma and Persicae Semen group significantly decreased ( P<0.05), the level of serum IL-1β [(8.66 ± 1.07) ng/L, (8.15 ± 1.23) ng/L, (7.99 ± 1.11) ng/L vs. (14.08 ± 2.54) ng/L] significantly decreased ( P<0.01), the expression of SIgA (1.38 ± 0.15, 2.87 ± 1.17, 2.79 ± 0.80 vs. 0.65 ± 0.12) in intestinal mucosa in the low, medium and high dose of Rhei Radix et Rhizoma and Persicae Semen group significantly increased ( P<0.01). The levels of serum D-LA [ (8.57 ± 1.73) mg/L, (7.13 ± 1.75) mg/L vs. (14.58 ± 2.81) mg/L], ET [ (77.39 ± 6.83) mg/ml, (50.49 ± 7.80) mg/ml vs. (138.22 ± 7.79) mg/ml] significantly decreased ( P<0.01), the expression of CD4 +T (2.61 ± 0.83, 2.91 ± 1.62 vs. 1.15 ± 0.98) and CD8 +T (2.88 ± 0.69, 3.01 ± 1.86 vs. 1.26 ± 0.74) cells in intestinal mucosa in the medium and high dose of Rhei Radix et Rhizoma and Persicae Semen group significantly increased ( P<0.01). Conclusion:Rhei Radix et Rhizoma and Persicae Semen decoction can improve intestinal mucosal permeability, protect intestinal mucosal immune barrier and reduce inflammatory reaction in the treatment of adhesive intestinal obstruction.
ABSTRACT
One of the distinct characters of Latrodectus tredecimguttatus is that its toxic components exist not only in the venomous glands, but also in the tissues outside the venomous glands and even in the eggs. Investigation on the toxins outside the venomous glands can deepen our understanding of spider toxins and discover new lead molecules with important application prospects. In order to explore the low-abundance proteinaceous toxins in the L. tredecimguttatus eggs, we used bioinformatic strategies to mine a gene sequence encoding a peptide toxin from the transcriptome of L. tredecimguttatus eggs, and then heterologously expressed the gene successfully with a 3'-RACE combined with nest PCR strategy. Biological activity analyses indicated that the expressed peptide toxin, named latroeggtoxin-Ⅵ (LETX-Ⅵ), could inhibit Na⁺ channel currents in ND7/23 cells and promote dopamine release from PC12 cells, without obvious toxicity against Periplaneta americana and bacteria as well as fungi including Staphylococcus aureus and Candida albicans, demonstrating that LETX-Ⅵ is a mammal-specific neurotoxin with a potential application prospect in development of the tool reagents for neurobiological study and the drugs for treating related diseases.
Subject(s)
Animals , Rats , Arthropod Proteins/genetics , Black Widow Spider/genetics , Cloning, Molecular , Spider Venoms/genetics , TranscriptomeABSTRACT
OBJECTIVE@#To investigate the effects of Aurantii Fructus Immaturus (Zhishi, ZS) and Atractylodis Macrocephalae Rhizoma (Baizhu, BZ)-containing serum on glutamate-induced autophagy in rat colonic interstitial cells of Cajal (ICCs) and to analyze the underlying mechanism.@*METHODS@#Rat colonic ICCs cultured in vitro were identified by fluorescence and then stimulated with glutamic acid (5 mmol/L) for 24 h to establish a cell model of autophagy. The cells were then treated with different concentrations of ZSBZ-containing serum or rat serum. The viability of the ICCs was detected with cell counting kit-8 assays, and cell apoptosis rates were examined with flow cytometry. The ultrastructure and autophagosomes in the ICCs were observed using transmission electron microscopy. The effects of ZSBZ-containing serum on apoptosis-associated mediators were assessed by Western blotting and real-time quantitative polymerase chain reaction. In addition, microtubule-associated protein light chain 3 (LC3), p-phosphoinositide 3-kinase (p-PI3K), p-Akt and p-mammalian target of rapamycin (p-mTOR) expression was detected via Western blotting analysis.@*RESULTS@#Compared to those in the model group, ICC viability and apoptosis rates were significantly increased by ZSBZ-containing serum (P < 0.05). In addition, the expression levels of Beclin-1, LC3, p-PI3K, p-Akt and p-mTOR were significantly lower (P < 0.05) and Bcl-2 expression was higher in the ZSBZ-containing serum treatment groups than in the model group (P < 0.05).@*CONCLUSION@#Our findings demonstrated that ZSBZ protects glutamic acid-stimulated ICCs, and this beneficial effect may be mediated by a reduction in autophagy via inhibition of the PI3K/Akt/mTOR pathway.
ABSTRACT
Objective@#The characteristics of prescription medication for constipation in Wumen doctors in Ming and Qing Dynasties were analyzed by data mining method, so as to provide reference for the treatment of contemporary clinical constipation.@*Methods@#The Wumen medical school doctors in Ming and Qing Dynasties treating constipation in clinical case were selected for digital acquisition and process. The association rules and complex networks analysis were used for data mining in order to explore experience of famous doctors in Wumen medical treated constipation.@*Results@#A total of 202 cases records of constipation were collected from acient TCM books by the database of ancient books and literatures of library of Nanjing University of Traditional Chinese Medicine. The results showed that the highest syndromes of 202 prescriptions was Qi stagnation and yin deficiency, followed by damp-heat, blood deficiency and liver-stomach disharmony, and the top ten medicines for internal use were angelica, almond, arborvitae, flaxseed, pinellia, cistanche, dried rehamnnia root, radix paeoniae alba, rhubarb, poria, licorice, etc. The core medicine in pairs included the Platycodon grandiflorum-almonds, safflower-peach kernel, safflower-angelica and other drugs outside, carthami-semen pruni-Peach kernel, carthami-semen pruni-Angelica, carthami-angelica-peach, peony-rhubarb-magnolia.@*Conclusions@#Most of the doctors in the Ming and Qing Dynasties believed that constipation was based on deficiency and reality, took Xinrun Tongluo as its treatment method, and paid attention to the treatment of activating blood circulation, warming yang and regulating qi and resolving phlegm, and emphasized the relationship between constipation and lung, spleen, liver and kidney.
ABSTRACT
Objective The characteristics of prescription medication for constipation in Wumen doctors in Ming and Qing Dynasties were analyzed by data mining method, so as to provide reference for the treatment of contemporary clinical constipation. Methods The Wumen medical school doctors in Ming and Qing Dynasties treating constipation in clinical case were selected for digital acquisition and process. The association rules and complex networks analysis were used for data mining in order to explore experience of famous doctors in Wumen medical treated constipation. Results A total of 202 cases records of constipation were collected from acient TCM books by the database of ancient books and literatures of library of Nanjing University of Traditional Chinese Medicine. The results showed that the highest syndromes of 202 prescriptions was Qi stagnation and yin deficiency, followed by damp-heat, blood deficiency and liver-stomach disharmony, and the top ten medicines for internal use were angelica, almond, arborvitae, flaxseed, pinellia, cistanche, dried rehamnnia root, radix paeoniae alba, rhubarb, poria, licorice, etc. The core medicine in pairs included the Platycodon grandiflorum-almonds, safflower-peach kernel, safflower-angelica and other drugs outside, carthami-semen pruni-Peach kernel, carthami-semen pruni-Angelica, carthami-angelica-peach, peony-rhubarb-magnolia. Conclusions Most of the doctors in the Ming and Qing Dynasties believed that constipation was based on deficiency and reality, took Xinrun Tongluo as its treatment method, and paid attention to the treatment of activating blood circulation, warming yang and regulating qi and resolving phlegm, and emphasized the relationship between constipation and lung, spleen, liver and kidney.
ABSTRACT
Plants are known to possess plenty of pharmacological activities as a result of various phytoconstituents. Tetramethylpyrazine (TMP), one of the most widely used medicinal compound isolated from traditional Chinese herb, is usually employed for anti-oxidation, anti-inflammation, anti-platelet aggregation, anti-lipid, anti-fibrosis, as well as activating blood, removing stasis, dilating small arteries, improving microcirculation and antagonizing calcium. In the present paper, the anti-adhesion effect of TMP were reviewed. TMP was found to play a multi-target and muti-link role in anti-adhesion by inhibiting hyperplasia of collagen and overexpression of adhesion-related factors and reducing the concentration of white blood cells and fibrin in plasma. Because previous studies mostly focused on in vitro experiments and animal experiments, there is an urgent need for clinical research with abundant indicators to further prove its anti-adhesion potency. Future basic research should concentrate on the development of TMP as a biological material.
ABSTRACT
Objective To observe the effect of Yang-warming and Qi-tonifying Recipe (YQP)on aquaporin 3(AQP3) and AQP8 in rats with slow transit constipation,and to explore its therapeutic mechanism. Methods Forty rats were randomly divided into modeling group(N=30)and normal control group(N = 10). After successful modeling by gastric gavage of loperamide,the modeled rats were randomly divided into model group,YQP group and Mosapride group,10 rats in each group,and were separately treated with corresponding medicine for 2 weeks. After treatment, the colonic transit function was measured by carbon propelling test. The protein levels of AQP3 and AQP8 were detected by immunohistochemistry and their mRNA expression levels were detected with real-time fluorescence polymerase chain reaction (qPCR). Results Compared with the normal control group,the propelling rate of carbon particle in the model group was decreased,and the protein and mRNA expression levels of AQP3 and AQP8 were significantly increased(P<0.05 or P<0.01). Compared with the model group,the propelling rate of carbon particle of YQP group and mosapride group was significantly increased, and the protein and mRNA expression levels of AQP3 and AQP8 were significantly decreased (P<0.05),but there was no significant difference between YQP group and mosapride group (P >0.05). Conclusion YQP had therapeutic effects on loperamide-induced constipation through decreasing the expression of AQP3 and AQP8 in the intestine,reducing the reabsorption of intestinal fluid, and increasing the fecal water content.
ABSTRACT
Objective To design an electrical system of extracorporeal shock wave lithotripter for children and adults uses.Methods The shock wave kernel parameters of child energy section of Dornier Delta Ⅱ lithotripter were tested such as peak sound pressure,pressure pulse width and pressure pulse rise time,and then energy calibration was executed for HK.ESWL008 child extracorporeal shock wave lithotripter to make the kernel parameters of the two lithotripters the same or similar to each other.An electrical system was designed with PLC system as the core control unit,involving in wave source 3D motion,large and small C-arms motion,water circulation system,B-type ultrasound positioning system,high-frequency X-ray imaging system,high-voltage condenser charging and discharging system,console and bedside-box-controlled display system as well as electromagnetic compatibility.Results Within A,B,C,1 and 2 energy sections for child lithotripsy the maximum and average differences between the kernel parameters of the two lithotripters were 7.1％ and 3.8％ respectively.There was no difference between the clinical experience by the two lithotripters,and HK.ESWL-008 child extracorporeal shock wave lithotripter passed EMC and safety detections by Guangdong Medical Devices Quality Surveillance and Test Institute of CFDA.Conclusion HK.ESWL-008 child extracorporeal shock wave lithotripter can be used for children lithotripsy clinically.
ABSTRACT
<p><b>OBJECTIVE</b>To study the effect of ligustrazine nanoparticles nano spray (LNNS) on transforming growth factor β (TGF-β)/Smad signal protein of rat peritoneal mesothelial cells (RPMC) induced by tumor necrosis factor α (TNF-α), and the anti-adhesion mechanism of LNNS in the abdominal cavity.</p><p><b>METHODS</b>The primary culture and subculture of rat peritoneal mesothelial cells (RPMC) was processed by trypsin digestion method in vitro. The third generation was identifified for experiment and divided into 5 groups: a blank group: RPMC without treatment; a control group: RPMC stimulated with TNF-α; RPMC treated by a low-dosage LNNS group (2.5 mg/L); RPMC treated by a medium-dosage LNNS group (5 mg/L); and RPMC treated by a high-dosage LNNS group (10 mg/L). Reverse transcription-polymerase chain reaction was applied to test the expression of fifibronectin, collagen I (COL-I), TGF-β mRNA, and Western blot method to test the Smad protein 7 expression of RPMC.</p><p><b>RESULTS</b>Compared with the blank group, a signifificant elevation in fifibronectin (FN), COL-I and TGF-β mRNA expression of RPMC were observed in the control group (P<0.05). Compared with the control group, LNNS suppressed the expressions of FN, COL-I and TGF-β mRNA in a concentrationdependent manner (P<0.05). The expression of Smad7 protein of RPMC was down-regulated by TNF-α stimulation, and up-regulated with the increase of LNNS dose (P<0.05).</p><p><b>CONCLUSIONS</b>TNF-α may induce changes in RPMC's viability, leading to peritoneal injury. LNNS could reverse the induction of fifibrosis related cytokine FN, COL-I and TGF-β, up-regulating the expression of Smad7 by TNF-α in RPMC, thus attenuate peritoneal injury by repairing mesothelial cells.</p>
Subject(s)
Animals , Male , Collagen Type I , Genetics , Metabolism , Epithelium , Metabolism , Fibronectins , Metabolism , Nanoparticles , Chemistry , Particle Size , Peritoneal Cavity , Cell Biology , Pyrazines , Pharmacology , RNA, Messenger , Genetics , Metabolism , Rats, Sprague-Dawley , Signal Transduction , Smad Proteins , Metabolism , Transforming Growth Factor beta , Genetics , Metabolism , Tumor Necrosis Factor-alpha , PharmacologyABSTRACT
Anti-adhesive materials were the hot spot in recent clinical study because opinions were vary from different experts . This paper aims to introduce the classification of anti-adhesive materials according to the different properties and expound the mecha-nism and application limitation of anti-adhesive .The pitfalls in current barrier materials research and future research directions are summarized and analyzed .
ABSTRACT
The objective of this study is to generate broad spectrum monoclonal antibody ( mAb ) against a group of pyrethroid insecticides and to identify its immunological characteristics. The generic hapten 3-phenoxy-benzoic acid ( PBA) was conjugated to carrier protein BSA by activated ester method. Balb/c mice were immunized with PBA-BSA. The titer of polyclonal antibody ( pAb ) was detected by indirect enzyme-linked immunosorbent assay ( ELISA) after five times immunization. The mouse with high titer and sensitivity was selected for cell fusing. The splenocytes of immunized mice were fused with Sp2/0 cells and the cultural supernatants of hybridoma cells were screened by indirect non-competitive ELISA based on the coating antigen PBA-ovoalbumin ( PBA-OVA ) . High-sensitivity and high-specificity mAb was prepared after subcloning using limiting dilution method. Purified mAb was obtained after purified by saturated ammonia sulfate precipitation and protein G affinity column. The immunological characteristics of mAb such as titer, antibody subtypes, affinity constant and the sensitivity to pyrethroid insecticides were characterized by indirect ELISA; The results of UV spectroscopy and SDS-PAGE showed that PBA-BSA artificial antigen was synthesized successfully. A hybridoma cell line (4H11) secreting anti-pyrethroid mAb was established. The titre of ascites was up to 1:6. 5×106, and the mAb was IgG1 subtype. The affinity constant of the mAb to PBA was about 2. 5×107 L/mol, with a IC50 value of 208. 83 μg/L and a detection limit of 21. 23 μg/L to PBA. Simultaneously, beta-cypermethrin, flucythrinate, cypermethrin and fenvalerate were sensitively recognized by the mAb with the IC50 of 1. 01, 2. 15, 3. 16 and 3. 67μg/L, respectively.
ABSTRACT
Objective To analyze the incidence and risk factors of microalbuminuria in newly diagnosed and hospitalized type 2 diabetes mellitus patients,and to provide the theoretical basis for therapy of diabetes and diabetic chronic complications.Methods The blood glucose,lipid profile,24h-urinaryalbumin,fasting and postprandial serum insulin and peptid C were measured in 286 newly diagnosed and hospitalized type 2 diabetic patients from Mar.2006 to Sep.2009.Microalbuminuria was defined as the 24h-urinary albumin between 30 to 300 mg twice.Insulin resistance index (HOMA-IR) was recorded and all the patients received fundus examination by ophthalmologists after expansion of the pupil to ensure whether there was retinopathy or not.Results (1)The incidence rate of microalbuminuria in this study was 19.58％ (56/286).(2)Normal albuminuria group and MA group combined DR were 19.57％ (45/230) and 33.93 ％ ( 19/56 ) respectively,and the difference was statistically significant( x2 =5.349,P =0.021 ).Compared with control,the FPG,HbA1c and HOMA-IR were significantly higher in microalbuminuria group ( FPG:[ 11.08 ± 1.76 ] mmol/L vs [9.24 ±1.65]mmol/L,t =-6.148,P ＜0.001;HbA1c:[11.54 ± 1.59]％ vs [9.39 ± 1.64]％,t =-7.533,P ＜0.001 ;HOMA-IR:[3.73 ±0.42] vs [3.50 ±0.30],t =-3.774,P ＜0.001 ).(3) Pearson correlation analysis revealed microalbuminuria was positively correlated with FPG( r =0.460),HbA1 c ( r =0.499),HOMA-IR( r =0.308)and combined DR(r =0.405)(P ＜0.01).(4)Stepwise multiple regression analysis revealed that FPG (ββ =- 0.804,P ＜ 0.01 ),HbA1 c (β =- 0.455,P ＜ 0.01 ) and combined DR (β =1.527,P ＜ 0.05 ) were independently risk factors of microalbuminuria.Conclusion The development of microalbuminuria in newly diagnosed and hospitalized type 2 diabetic patients is associated with FPG,HbA1c and HOMA-IR,and will be easier to merge diabetic retinopathy.