Extraction of organic pigments from tomato (Solanum lycopersicum L.), turmeric (Curcuma longa L.) and red amaranth (Amaranthus tricolor L.) for safe use in agro-products

The utilization of synthetic dyes in food industries is a great concern for food safety and health issues. So, natural pigments can be an excellent substitute for synthetic dyes and also health-friendly for consumers. In the experiment, natural pigments were extracted from tomato (Solanum lycopersicum L.), turmeric (Curcuma longa L.) and red amaranth (Amaranthus tricolor L.). Then the stability and consumer acceptance of the extracted pigments were examined. The highest amount of pigment was extracted from turmeric (2.14 ± 0.30 %) with ethanol solvent, followed by tomato (0.67 ± 0.06 %) with hexane: acetone (1:1) solvent, and red amaranth (0.78 ± 0.05 %) with acetone solvent. Turmeric pigment showed the highest stability in high temperatures and light exposure. All of the pigments were highly stable in a neutral environment; however, tomato pigment showed the highest stability index (84.33 ± 2.52) at pH 3.0, but turmeric pigment showed the highest stability (91.67 ± 1.53) at pH 5.0. The simple preference test revealed that the use of turmeric pigment in boiled rice had the highest acceptance rate, and in terms of taste and flavor, red amaranth pigments in ice cream. So turmeric pigment can be utilized in high-temperature processing and/or acidic foods, but tomato and red amaranth pigments might be in low-temperature processing foods such as the ice-cream and soft drinks processing industry.

Troponin I Elevation after Elective Percutaneous Coronary Interventions: Prevalence and Risk Factors

Percutaneous coronary intervention (PCI) is one of the most important modalities of treatment for coronary artery disease (CAD). Minor extents of injury to the myocardium have been observed even after successful PCI. This peri-procedural injury might therefore reduce some of the beneficial effects of coronary revascularization. The objective of this hospital based comparative observational study was to determine the prevalence of post procedural Cardiac troponin I (cTnI) elevation after elective PCI and also to find out the relation with risk factors such as age, sex, body mass index (BMI), smoking, anemia, diabetes mellitus, hypertension, dyslipidemia, family history, left ventricular dysfunction, renal insufficiency, type of stent, number of stent and length of stent. This was a hospital based comparative observational study carried out in the Department of Cardiology, Chattogram Medical College Hospital (CMCH), Chattogram, Bangladesh from July 2018 to June 2019. A total of 50 patients who underwent elective PCI were included as sampled by purposive sampling method. Serum cTnI was measured by FIA8000 quantitative immunoassay analyzer with an analytical measurement before and at 24 hours of PCI. Value >1.0ng/ml was considered elevated. Univariate and multivariate analysis were applied to assess predictors for the occurrence of post-procedural elevation of cTnI. The mean±SD age of the study population was 54.96±9.1 years (range 35-74 years) and 34(68.0%) patients were male. Regarding cardiovascular risk factors, 17(34.0%) patients had diabetes mellitus, 27(54.0%) had dyslipidemia, 30(60.0%) had hypertension, 32(64.0%) were current or ex-smokers and 20(40.0%) had a family history of CAD. Eighteen patients (36.0%) had post-procedural cTnI elevation but only 8(16.0%) had significant (>1.0ng/ml) elevation. Change of cTnI before and at 24 hours of PCI was not significant (p=0.057). Cardiac Troponin I increase was related to age, pre-procedural serum creatinine and multi-vessel stenting. Minor elevation of cTnI was common following elective PCI and associated with few risk factors such as elderly patient (more than 50 years), raised serum creatinine and multi-vessel stenting. So, early detection of these risk factors, as well as effective intervention may help to prevent injury to cardiac tissue hence stop elevation of cardiac TnI following elective PCI.

Photocatalytic degradation of chlorazol yellow dye under sunlight irradiation using Ce, Bi, and N co-doped TiO2 photocatalyst in neutral medium

Chlorazol yellow (CY) is a commonly used anionic, toxic, mutagenic, and potentially carcinogenic azo dye, which is menacing to the environment, aquatic system, food chain, and human health as well. To remove CY dye molecules from an aqueous medium, a series of Ce, Bi, and N co-doped TiO₂ photocatalysts were prepared by varying the composition of the dopants. Under sunlight irradiation, the resultant 5 wt% (Ce-Bi-N) co-doped TiO₂ composite catalyst was found to show the best catalytic activity. Hence, the required characterization of this catalyst was performed systematically using energy-dispersive X-ray spectroscopy (EDX), scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) techniques. From the thorough investigation, it is revealed that the CY molecules reached adsorption-desorption equilibrium onto the surface of the catalyst within 30 min following second-order kinetics. Herein, the catalyst attained 97% degradation when exposed to sunlight at neutral (pH ~ 7, [CY] = 5 mg L^-1) medium. The developed catalyst can destruct CY molecules with a maximum rate of 23.1 µg CY g^-1 min^-1 and the photodegradation kinetics follows first-order kinetics below 23.5 mg L^-1, a fractional order between 23.5 and 35.0 mg L^-1, and a zeroth order above 35.0 mg L^-1 of CY concentration. Finding from scavenging effect implies that [Formula: see text] and [Formula: see text] radicals have significant influence on the degradation. A suitable mechanism has been proposed with excellent stability and verified reusability of the proposed photocatalyst.

Antimicrobial Resistance of E Coli Causing Urinary Tract Infection in Bangladesh

Rapid spread of multidrug resistant microorganisms is a matter of great concern throughout the glove including Bangladesh. The objective was to identify the causative organisms for urinary tract infection (UTI) and their sensitivity patterns to antibiotics. This descriptive cross-sectional study was conducted on patients admitted with UTI (n=60) at a tertiary level hospital in Dhaka, Bangladesh from March 2019 to September 2019. Data were collected through clinical record reviews. Data of all these 60 cases were analyzed for socio-demographic characteristics. Of the 60 patients, culture and sensitivity report was available for 42 patients. Therefore, data were further analyzed for these 42 cases. Median age of patients was 35 years and 80% were female. The main organisms isolated from urine culture of UTI patients were E. coli (64%), Klebsiella (12%) and Enterococci species (10%). Susceptibility to antibiotics was analyzed only for E. coli (n=27) since the number of isolates of other organisms were small. E. coli was found to be resistant to most of the first- and second-line antibiotics, such as Amoxicillin (100%), Amoxyclav (72%), Co-trimoxazole (89%), Nalidixic acid (78%), Ceftazidim (94%), Ceftriaxone (73%), Cefuroxime (100%), Ciprofloxacin (59%), Cephotaxime (80%), Cefixime (100%) and Moxifloxacin (100%). E. coli was the predominant organism responsible for UTI and was resistant to most of the first- and second-line antibiotics. Immediate action is needed to develop empirical guideline for empirical management of UTI and establish surveillance system for monitoring.

A Highly Efficient and Stable Photocatalyst; N-Doped ZnO/CNT Composite Thin Film Synthesized via Simple Sol-Gel Drop Coating Method

The thin film of N-doped ZnO/CNT nanocomposite was successfully fabricated on soda lime glass substrate by a simple sol-gel drop-coating method. The structural, morphological, chemical, and optical properties of as prepared samples were characterized by a variety of tools such as X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Fourier Transform Infrared spectroscopy (FT-IR), and UV-visible spectroscopy. The hexagonal crystalline structure was confirmed from XRD measurement without any other impurity phase detection in samples. The N-doped ZnO/CNT composite showed excellent photo-catalytic activity towards cationic methylene blue (MB) dye degradation with 100% removal rate under UV light irradiation as compared to N-doped ZnO (65%) and pure ZnO (47.36%). The convincing performance has also been observed for the case of visible light irradiation. The enhancement of that photocatalytic activity might be due to narrowing the band gap as well as the reduction of electron-hole pair recombination in ZnO matrix with the incorporation of dopant nitrogen and CNT. It is assumed from the obtained results that N-doped ZnO/CNT nanocomposite thin film can be employed as an economically achievable and ecofriendly method to degrade dye with UV and visible light irradiation. Additionally, density functional theory (DFT) calculations were applied to explore the effect of N-doping on electronic structure of ZnO. The computational study has supported the experimental results of significant band gap contraction, which leads to the maximum absorption towards higher wavelength and no appreciable change of lattice parameters after doping. A conceivable photocatalytic mechanism of N-doped ZnO/CNT nanocomposite has been proposed as well.

Childhood Adversities as Risk Factors and Persistence of Suicidal Behavior: A Descriptive Cross-Sectional Study

Suicide is one of the important cause of death worldwide. The precise effect of childhood adversities as risk factors for the onset and persistence of suicidal behaviour are not well understood. A descriptive cross sectional study was carried out in the department of Psychiatry, Cumilla Medical College, Cumilla, Bangladesh. All cases were selected from patients attending at Cumilla Medical College hospital and Private Hospitals in Cumilla City from April 2017 to September 2018. We found out the association between childhood adversities and suicidal behaviour over the life course and delineated the types of suicidal behavior. Total 120 cases were included in the study. Respondents provided socio-demographic and diagnostic information, childhood adversities as well as an account of suicide-related thoughts and behaviours. A participation rate was 77.5% female. Of 120 suicidal behavior participants physical abuse was 2.5%, sexual abuse was 16.67%, parental death was 5%, parental divorce was 2.5%, other parental loss was 4.17%, family violence was 5%, physical illness was 1.67%, financial adversity was 3.33% and composite adversity was 59.16%. Among childhood adversities participants suicidal ideation was 70%, suicidal plans was 15.83%, suicidal attempts was 45%, ideators only proceeded to plans was 22.5%, ideation to attempt was 63.33%, planned attempts was 10.83% and impulsive attempts was 52.5%. Among suicidal behavior participant's psychiatric disorders were 65%. Where neurotic disorders were 17%, psychotic disorders were 13%, personality disorders were 44% and others disorder was 26%. Most of the suicidal behavior patients were female 77.5% and age group of 18-24 years. Childhood sexual abuse emerged as a particularly robust risk factor for suicide attempts in younger participants. Childhood physical and sexual abuse emerged as risk factors for the emergence and persistence of suicidal behaviour, especially in adolescence. Two or more childhood adversities were associated with a three fold higher risk of lifetime suicide attempts. Childhood adversities are main risk factors for the onset and persistence of suicidal behaviour. The risks being are the greatest in childhood, adolescence and early adult. A longitudinal follow-up study is required to give a more reliable in Bangladesh.

Biodegradation of reactive textile dye Novacron Super Black G by free cells of newly isolated Alcaligenes faecalis AZ26 and Bacillus spp obtained from textile effluents

Bacteria were isolated from effluents of textile industries and screened by their capability to decolorize at least one of eight reactive dyes used in the textile industries. Three isolates having the capability to decolorize the highest number of dyes with more than 25% of decolorization were identified as Alcaligenes faecalis AZ26, Bacillus cereus AZ27 and Bacillus sp. AZ28 based on morphological, cultural, biochemical characteristics, and 16S rDNA sequence analysis. The decolorization capability of these three bacterial isolates was optimized under different physicochemical conditions by using Novacron Super Black G (NSB-G), one of the eight reactive dyes commonly used in textile industries. These bacterial isolates grew well in the presence of up to 500 mg L⁻¹ of NSB-G and showed decolorization of approximately 90% at 200 mg L⁻¹ of NSB-G after 96 h of cultivation at 37 °C and pH 8.0 under static condition. Decolorization of NSB-G by the bacterial isolates was investigated using UV-VIS spectrophotometry and Fourier Transform Infrared Spectroscopy (FTIR) analysis. The UV-visible absorbance spectra and the FTIR spectrum of the decolorized NSB-G significantly differed from those of the parent dye, indicating that the NSB-G was degraded by the bacterial isolates. High decolorization extent supports the notion that the bacterial isolates reported herein might have potential in the biological treatment of dyeing mill effluents.

Anti-Phospholipid Antibody Syndrome with Subdural Hematoma: A Case Report

A 33-year-old man with anti-phospholipid antibody syndrome associated with Budd Chiari syndrome and subdural hematoma. He developed venous thrombosis in his hepatic vein (stenting done) when laboratory studies demonstrated prolongation of activated partial thromboplastin time (APTT). Subdural hematoma demonstrated with Computed tomography (CT) of brain. Laboratory studies revealed thrombocytopenia, prolonged bleeding time and APTT, positive antinuclear antibody and positive test results for both lupus anticoagulant and an anti-cardiolipin antibody, namely antiphospholipid antibodies. Based on these findings, we consider that the tendency of this bleeding may have been due to antiphospholipid antibodies, attacking the platelet membranes and that the bridging veins in the subdural space may be the site at which the bleeding tendency easily appears. Antiphospholipid antibody syndrome accompanied by hemorrhagic complications had rarely been reported. We suggest that special attention should be given to hemorrhagic complications in patients with antiphospholipid antibody syndrome associated with fragility of the vessels and/or platelet dysfunction and on anticoagulant (warfarin).Pulse Vol.10 January-December 2017 p.25-28

Wound Coverage of Infected Open Fracture of Distal Third of Tibia by Distally Based Medial Hemi-Soleus Muscle Flap

We conducted a study to evaluate the reliability of the medial hemi-soleus muscle flap for wound coverage of infected open fracture of distal third of tibia. Wound coverage of exposed lower third tibia and ankle region remains a difficult task. Muscle flaps are preferred for infected wounds especially where there are exposed bone, joint and/or tendons. Soleus muscle is a good option for local reconstruction. Soleus being the prime ankle plantar flexor and stabilizer of the ankle in ambulation cannot be sacrificed without significant morbidity. Soleus is a bipennate muscle with independent blood supply of each half. Using one half retains its important function, increases arc of rotation, and makes it easy to orientate for coverage of defect of any shape thus obviating the need for use of whole Soleus muscle flap. So, medial hemisoleus muscle flap is a superior option than the whole Soleus. This post-intervention prospective study which was descriptive in nature was conducted at department of Orthopedics, Community Based Medical College Hospital, Mymensingh, Bangladesh from January 2012 to December 2012. Ten patients with distal third tibial defects were included in the study. Data was obtained by history taking, observation, clinical examination, supported by routine laboratory and radiological investigations. Before intervention they underwent to careful vascular study of the affected limb through Doppler ultrasonography. All the patients were provided soft tissue coverage with distally based medial hemi-soleus muscle flaps with split thickness skin graft on it. All the flaps survived with primary healing of the wound. Among the participants there were 7 male and 3 female with average age 44.60 years, SD 13.73 years. Eight patients were injured by road traffic accident and 2 patients had history of alleged assault. The wound size defects in primary site ranged from 4cm to 9cm in length and 3cm to 6.5cm in breadth. All the wounds in the primary site were infected. The fractures in the primary site were open fractures involving distal third of tibia. In the secondary site the injuries were fracture upper third tibia in the other lower limb 2, fracture femur on other lower limb 1, dislocation shoulder joint on the same side upper limb 1. The follow up period ranged from 8-16 weeks (average 12 weeks). The outcome was successful. All flaps survived without complication. Hemisoleus muscle flap is a valuable local option for soft tissue coverage of distal third of leg. It does not sacrifice the whole soleus muscle. Due to its longer arc of rotation, this flap can cover the defect of different size and shape in distal third of leg.

A comprehensive analysis of trends and determinants of HIV/AIDS knowledge among the Bangladeshi women based on Bangladesh Demographic and Health Surveys, 2007-2014

Background

South-Asian countries are considered to be a potential breeding ground for HIV epidemic. Although the prevalence of this incurable disease is low in Bangladesh, women still have been identified as more vulnerable group. The aim of this study is to assess the knowledge about HIV/AIDS: its trends and associated factors among the women in Bangladesh.

Methods

We analysed the nationally representative repeatedly cross-sectional Bangladesh Demographic and Health Surveys (BDHSs) data: 2007, 2011, and 2014. These data were clustered in nature due to the sampling design and the generalized mixed effects model is appropriate to examine the association between the outcome and the explanatory variables by adjusting for the cluster effect.

Results

Overall, women’s knowledge about HIV/AIDS has been decreasing over the years. Education plays the leading role and secondary-higher educated women are 6.6 times more likely to have HIV/AIDS knowledge. The likelihood of knowledge is higher among the women who had media exposure (OR: 1.6) and knowledge on family planning (OR: 2.3). A rural-urban gap is noticed in women’s knowledge about HIV/AIDS and significant improvement has been observed among the rural and media exposed women. Results reveal that age, region, religion, socio-economic status, education, contraceptive use have significant (p<0.01) effects on women’s knowledge about HIV/AIDS.

Conclusion

This study recommends to emphasis more on women’s education, media exposure, and family planning knowledge in strengthening women’s knowledge about HIV/AIDS. In addition, residence specific programs regarding HIV/AIDS awareness also need to be prioritized.

Psychiatric Disorders in Drop out from Educational Attainment Attending Mental Health Facilities: A Descriptive Cross Sectional Study

Studies of the impact of mental disorders on educational attainment are rare. Mental disorders, those beginning in childhood or adolescence may increase the risk of early drop out from education. The latter has been shown to have adverse life-course consequences on individuals such as greater demand on social welfare entitlements. A descriptive cross sectional study was carried out at the department of Psychiatry, Comilla Medical College, Comilla, Bangladesh. All cases were selected from patients attending at Comilla Medical College Hospital and Private Mental Health Facilities in Comilla City from March 2015 to February 2016. We found out the psychiatric disorders and socio-demographic status of patients with educational drop out over the early life course. A total of 50 dropout patients aged 10 to 30 years who fullfiled the enrolment criteria included in the study. Sociodemographic questionnaires, diagnostic information (DSM-5 and ICD-10) as well as an account of a various level of education were used as research instruments. The Frequency tables, summary tables and appropriate graphs were prepared to describe the population characteristics and study finding. The most of the psychiatric morbidity presents in male (62%) and age group of 18-24 years (54%). In this study, anxiety disorders was 8%, behaviour/ impulse control disorders was 8%, mood disorders was 16%, substance use disorders was 24%, schizophrenia spectrum disorders was 12% and composite psychiatric disorders was 32%. Among drop out patient's non- completion of primary education was 14%, non-completion of secondary education was 20%, non- completion of higher secondary education was 24%, not entry to tertiary education was 12% and non-completion of tertiary education was 30%. Among behaviour/impulse control disorders non-completion of primary education was 6%, substance use disorders non-completion of higher secondary education was 10%, mood disorder both non-completion of higher secondary education and non-completion of tertiary education were 6%. Among composite psychiatric disorders non-completion of secondary education, non-completion of higher secondary education and non-completion of tertiary education were 8%, 6% and 12% respectively. Onset of mental disorders and subsequent drop out from education was found in this study. Further multi-centered prospective and population-based studies should be designed to find out the exact situation.

Histological and Cytological Correlation of Cervical Cancer and Precancerous Lesions in a Tertiary Hospital in Bangladesh

Over 500,000 new cases of cervical cancer are diagnosed each year in the world, resulting in 250000 deaths. Prevalence of HPV-related cervical carcinoma in Bangladesh is highest among SAARC countries. In Bangladesh very few studies have been published on establishing the correlation between histological and cytological findings on cervical cancer and precancerous lesions. This descriptive cross-sectional study was performed to find out the correlation between histological & cytological findings of cervical cancer and precancerous lesions. In the present study, cervical smears were collected from the selected patients attending the colposcopy clinic of BSMMU from July 2011 to April 2013. Biopsy was done on colposcopically positive cases and histopathological reports were obtained. Thus 99 histologically proven cases of cervical cancer and precancerous lesion were selected. Pap smear was carried out on these 99 samples after histopathological examination. Among the 60 CIN-1 cases in histology, 18(30%) cases were diagnosed positive by Pap smear; out of 20 histologically diagnosed cases of CIN-II, only 12(60%) cases were correctly diagnosed by cytology. But in case of invasive squamous cell carcinoma 18 out of 19 were correctly diagnosed by Pap smear reaching a concordance rate of 94.74%. Overall the relation reached statistical significance (p<0.05). Larger community based studies are required in this respect to find a consistent correlation between hr-HPV load and cervical cancer and precancerous lesions.

ID: 96: CINOBUFOTALIN AS A NOVEL AGENT TO INHIBIT IN-VITRO EPITHELIAL OVARIAN CANCER CELL PROLIFERATION, MIGRATION AND INVASION

Objective

Cinobufotalin (CINO), a cardiotonic steroid (CTS) or bufadienolide, is extracted from the skin secretions of giant toads and is utilized in traditional Chinese medicine (Chan Su). CINO has been used as a cardiotonic, diuretic and a hemostatic agent. Our lab is familiar with CINO and has shown it to inhibit cytotrophoblast cells function. Recently, it has been shown that CINO also inhibits the lung cancer cell function, and has been further implicated in other disease processes. In the present study, we propose to pursue this potential application of CINO using ovarian tumor cell line SK-OV-3.

Study Design

We evaluated the in-vitro effect of CINO on ovarian cancer cell line SK-OV-3. Cells were treated with 0.1, 1, 5, and 10 µM CINO. Cell proliferation was measured using a CellTiter Assay (Promega), which is a colorimetric method for determining the number of viable cells. Cell migration was measured using a CytoSelect Assay (Cell Biolabs). Cell invasion was measured using a FluoroBlok Assay (BD). Cell viability was measure using a CellTiter Assay (Promega). Cell cycle progression was evaluated by a Cell Cycle Phase Determination Kit (Cayman Chemical) and apoptosis was evaluated by an Apoptotic Blebs Assay Kit (Cayman Chemical). Cell cycle arrest and apoptotic signaling was determined by fluorescence-activated cell sorting (FACS) analysis.

Results

CINO at ≥0.5 µM inhibited SKOV-3 cell proliferation, migration, and invasion (p<0.05). There was a higher (p<0.05) percentage of S phase cells in groups treated with CINO at 0.5 µM. CINO at ≥0.5 µM down regulated expression of PCNA and caused cell death.

Conclusion

This data demonstrates that CINO impairs SK-OV-3 cell function via cell cycle arrest and apoptotic signaling. These findings demonstrate the complex nature of this compound. Not only is CINO directly modulating the actions of the Na/K ATPase through classic mechanism of cardiotonic steroids, but is also directly influencing the nuclear expression of proteins involved in cell cycle progression and DNA repair. Additional investigational studies looking into the molecular pathways involved in altering cell cycle and entry into apoptosis are warranted.

In conclusion, we have shown CINO to impair SK-OV3 cell function via cell cycle arrest and apoptotic signaling and suggest that CINO might be further investigated as a novel anti-ovarian cancer agent.

ID: 71: PRAVASTATIN PROTECTS A SW-71 CYTOTROPHOBLAST CELL LINE FROM A HYPERGLYCEMIA-INDUCED PREECLAMPSIA PHENOTYPE

Objective

An increasing level of evidence supports the utility of pravastatin as prevention against preeclampsia (preE). We previously demonstrated a hyperglycemia induced cytotrophoblast (CTBs) dysfunction characteristic of a preE-like phenotype and sought to demonstrate the utility of pravastatin in rescuing CTBs from this hyperglycemia induced dysfunction.

Methods

Human CTBs were treated with 100, 150, 200, 300, or 400 mg/dL glucose for 48 hrs. Cells were treated with pravastatin (1 ug/mL) either alongside or 2 hrs prior to glucose exposure. Some cells were treated with D-Mannitol as a negative control for glucose exposure. Cell migration was performed by Matrigel migration assay kit according to manufacturer protocol. Cell lysates were utilized to evaluate the mRNA expression of urokinase plasminogen activator (uPA) and plasminogen activator inhibitor 1 (PAI-1), while also assessing proliferating cell nuclear antigen (PCNA) and p38 MAPK phosphorylation by western blot. Levels of vascular endothelial growth factor (VEGF), placental growth factor (PlGF), soluble fms-like tyrosine kinase-1 (sFlt-1), soluble endoglin (sEng) and interleukin 6 (IL-6) were measured in culture media using ELISA kits. Statistical comparisons were performed using analysis of variance with Duncan's post hoc test.

Results

Hyperglycemia inhibited CTBs migration by down-regulating uPA, PAI-1, PCNA and up-regulating p38 phosphorylation in cells treated with >150 mg/dL glucose compared to basal (100 mg/dL) (*p<0.05 for each). Secretion of sFlt-1, sEng and IL-6 were increased while VEGF and PIGF were decreased in CTBs treated ≥150 mg/dl of glucose (*p<0.05 for each). Both pravastatin pretreatment and co-treatment significantly rescued CTBs migration, up-regulating uPA, PAI-1, PCNA, down-regulating p38 phosphorylation, and correcting the angiogenic profile of CTBs (p<0.05 for each). D-Mannitol showed no osmotic effect on CTBs.

Conclusions

Pravastatin mitigates the hyperglycemia-induced dysfunction of CTBs by attenuating the glucose-induced anti-proliferative, anti-migratory, anti-invasive and anti-angiogenic phenotype similar to that seen in Preeclampsia. This study supports the potential for pravastatin use on CTBs development early in pregnancy and the importance of continuing research of pravastatin in preE prevention.

ID: 69: MARINOBUFAGENIN-INDUCED ANTI-ANGIOGENIC MILIEU IN CYTOTROPHOBLASTS IS ATTENUATED BY NOVEL ANTI-MBG ANTIBODIES

Preeclampsia (PreE) is a hypertensive pregnancy disorder, which occurs in approximately 10% of all gestations. Recently, a digitalis-like factor, marinobufagenin (MBG) has been implicated as a causative factor in preE. We demonstrated that MBG inhibits the proliferation, migration, and invasion of cytotrophoblast (CTB) cells. We have identified a novel human monoclonal antibody with higher specificity than Digibind for MBG. We assessed the attenuation of MBG-induced CTBs dysfunction by three anti-MBG antibodies: 206–208, H1L2, and 3e9.

Methods

A panel of anti-MBG antibodies with potential as human therapeutic agents was developed by Panorama Research, Inc.; Sunnyvale, CA (206–208, H1L2). H1L2 was a humanized version of previously described anti-MBG murine antibody 3e9. 206–208 was identified in a human phage antibody library. Human CTBs were treated with DMSO (vehicle) or 0.1, 1, 10 or 100 nM of MBG for 48 h. Some cells were pretreated with 206–208, H1L2, or 3e9 for 2h, while others were co-treated with these antibodies prior to MBG treatment. Culture media were collected for analysis of pro-angiogenic and anti-angiogenic factors. Cell viability was measured using a CellTiter Assay kit. Cell lysates were utilized to evaluate the expression of proliferating cell nuclear antigen (PCNA) and p38 MAPK phosphorylation by western blot. Levels of vascular endothelial growth factor (VEGF), placental growth factor (PlGF), soluble fms-like tyrosine kinase-1 (sFlt-1), and soluble endoglin (sEng) were measured in culture media using ELISA kits. Statistical comparisons were performed using analysis of variance with Duncan's post hoc test.

Results

MBG down-regulated PCNA and up-regulated p38 phosphorylation in CTBs treated with ≥1 nM MBG compared to basal (DMSO treatment) (*p<0.05 for each). Secretion of sFlt-1 and sEng were increased, while VEGF and PIGF were decreased in CTBs treated with ≥1.0 nM MBG (*p<0.05 for each). Both anti-MBG antibodies pretreatment and co-treatment significantly up-regulated PCNA and down-regulated p38 phosphorylation, and corrected the angiogenic profile of CTBs (p<0.05 for each). The anti-proliferative and anti-angiogenic effects of MBG were not due to a cytotoxic effect, as evaluated by a cell viability assay. MBG at 0.1 nM had no effect.

Conclusions

We found that all 3 anti-MBG antibodies attenuate MBG-induced anti-proliferative and anti-angiogenic milieu in cultured CTBs. Here we describe for the first time two fully human anti-MBG antibodies, which can be targeted as therapeutic agents for the development of innovative treatment strategies for preE and potentially other disorders involving aberrant MBG signaling.

ID: 105: COMPARISON OF PLACENTAL AND PLASMA SOLUBLE (PRO)RENIN RECEPTOR IN NORMAL AND PREECLAMPTIC PREGNANCY

Objective

Preeclampsia (preE), a syndrome of hypertension and proteinuria. Most recently it was demonstrated that high circulating levels of soluble (pro) renin receptor s(P)RR at delivery were associated with preE. In this study the placental expression of (P)RR were evaluated in preE patients and in a rat model of preE as well as in nonhuman primates. We also evaluated the circulatory levels of s(P)RR.

Study Design

(1) Placental samples were collected from 20 NP and 20 preE consenting patients in an IRB approved prospective study. (2) An established rat model of preE and NP rats (n=10 each) were used. (3) The placental samples from squirrel monkey (NP; n=10) and owl monkey (both early and term, NP, n=1) were collected. The (P)RR expression were measured both by western blotting (WB) and Immunohistochemistry (IHC) using anti-ATP6IP2. The levels of serum s(P)RR were measured by ELISA.

Results

The placental expression of (P)RR were higher (p<0.05) in preE compared to NP both in patients and rat model. The s(P)RR levels were higher in preE (preE patients: 29.2±4.5; PDS rats: 16.9±1.9 ng/mL) compared to NP (NP human: 19.3±4.2; NP rats: 10.4±3.7 ng/mL). The early placenta of owl monkey expressed higher (P)RR compared to term and were expressed in squirrel monkey placentas.

Conclusions

These data suggest that increased expression of (P)RR in the placenta are related to the occurrence of preE in both patients and rat models. These data also reconfirmed that the high level of circulatory s(P)RR is associated with preE. The higher expression of (P)RR in early owl monkey in compare to term placenta suggests that the (P)RR is important for normal placental development. The expression of (P)RR in nonhuman primates reveals the approach of future studies on owl monkey and squirrel monkey preE models.

ID: 45: EVALUATION OF CELLULAR MECHANISMS BY WHICH CINOBUFOTALIN INHIBITS OVARIAN CANCER CELL LINES FUNCTION

Objective

Cinobufotalin (CINO), a cardiotonic steroid (CTS) or bufadienolide, is extracted from the skin secretions of the traditional Chinese medicine giant toads (Chan su). CINO has been used as a cardiotonic, diuretic and a hemostatic agent. Previously we have shown that CINO inhibits the cytotrophoblast cell function. Recently other study has shown that CINO inhibits A549, a lung cancer cell function. In this study, we assessed the effect of CINO on three different ovarian cancer cell lines; SK-OV-3, CRL-1978 and CRL-11731 to confirm whether the effect of CINO is cell specific.

Study Design

We evaluated the effect of CINO on three ovarian cancer cells SK-OV-3, CRL-1978, and CRL-11731 function in vitro. Each Cell lines were treated with different concentrations of CINO (0.1, 1, 5 and 10 µM). For each cell line cell proliferation, migration and invasion were measured by using a CellTiter Assay (Promega), Cytoselect Assay (Cell Biolabs) and by using a FluoroBlock Assay (BD) respectively. Proliferating Cell Nuclear Antigen (PCNA) was also evaluated in cell lysates of CINO treated these 3 ovarian cancer cells by western blot analysis. Cell Cycle arrest and Cell viability were determined by fluorescence-activated cell sorting (FACS) analysis. We also performed Annexin V staining on CINO treated these 3 ovarian cancer cell lines by immunofluorescence to evaluate the pro-apoptotic protein expression. In addition mitochondrial membrane potential has also been measured for all these 3 ovarian cell lines after CINO treatment using MMP kit, by FACS analysis.

Results

Concentration of CINO at 0.5 µM inhibit SK-OV-3, CRL-1978, and CRL-11731 ovarian cancer cells proliferation, migration and invasion without cell death and loss of cell viability but cell viability differs for each cell line. Each cell lines differ in response to CINO doses for PCNA expression as well as Annexin V pro-apoptotic protein expression. CINO decreases mitochondrial membrane potential for SK-OV-3 but for CRL-1978 and CRL-11731 increases in response to CINO treatment.

Conclusion

CINO is cell specific, as each cancer cell line responds differently. These data demonstrate that the mode of action of CINO is different on these 3 types of ovarian cancer cells.

ID: 104: CINOBUFOTALIN HINDERS CYTOTROPHOBLASTS FUNCTION VIA CELL CYCLE ARREST

Objective

Preeclampsia (preE) is a hypertensive disorder of pregnancy. Cardiotonic steroids (CTS) are endogenous inhibitors of Na+/K+ ATPase and at least one CTS, marinobufagenin (MBG), is elevated in preE prior to the development of the syndrome in rats with preE. MBG and ouabain impair cytotrophoblast (CTB) function, which is critical for placental development.

Study Design

We evaluated the effect of a CTS, cinobufotalin (CINO), on CTB cell function in vitro.

Results

CINO at ≥1 nM inhibited CTB cell proliferation, migration, and invasion (p<0.05) but had no effect on cell viability. There was a higher (p<0.05) percentage of G0/G1 phase cells in groups treated with CINO at ≥1 nM. CINO caused an increase in stress signaling p38 MAPK and a positive annexin-V staining in CTB cells, indicating the activation of apoptotic signaling. However, the CINO induced apoptotic signaling was prevented by p38 inhibition.

Conclusion

This data demonstrates that CINO impairs CTB cell function via cell cycle arrest and apoptotic signaling.

ID: 56: COMPARISON OF OUTCOMES BETWEEN NORMAL AND PREECLAMPTIC PREGNANCIES: A PROSPECTIVE STUDY

Objective

Preeclampsia (preE) is a multifaceted complication found uniquely in the pregnant patient and one that has puzzled scientist for years. It has been demonstrated that preE is not a single disorder, but a complex syndrome that is produced by various pathophysiologic triggers and mechanisms affecting 3–8% of obstetrical patients worldwide. PreE, is a major cause of premature delivery and maternal and fetal death. It is characterized by de novo development of hypertension and proteinuria after 20 weeks gestation. preE has a significant link to alterations of placental function leading to stress and apoptotic signaling, which pass the placental barrier and leave persistent defect in the circulation of the offspring. We assessed the comparison of pregnancy outcome between patients with and without preE.

Methods

We recruited 20 normal pregnant (NP) and 20 preE consenting patients after deliveries in an IRB approved prospective study from Scott & White Healthcare. We evaluated the following parameters for mothers BP, Proteinuria, BMI, Gestational age, Age, Placental factors: circumference, placental signaling proteins. The placental stress signaling proteins (p38 MAPK, COX-2 and Bax/Bcl-2) were measured. We also evaluated babies for IUGR and anthropometric measurements. Comparisons were performed using Student's t test.

Results

Mothers in the PE group had significantly higher blood pressures (SBP p=0.0000001 and DBP p=0.001) and also higher urinary protein excretion (p=0.002). Average hospital stay for PreE babies were longer than NP babies (p=0.001879). No complications were reported for NP babies; however, preE babies had multiple complications like hypoglycemia, RDS etc though they were born at preterm. Many of the PreE babies were born premature (p=0.017). The birth weights of the PE babies were much lower than the NP babies with a p value of 0.027 and also the PE babies were significantly SGA when compare to the NP babies with significant difference in their Ponderal Index (PI) (p=0.0004). The placental stress signaling proteins p38 MAPK, COX-2 and Bax/Bcl-2 were up-regulated in preE compared to normal pregnancy (p<0.05, in each case).

Conclusions

PreE alters the intrauterine environment and activates the detrimental signaling that is transported to fetus resulting in premature deliveries, IUGR babies and their related complications like extended hospitalization.

ID: 18: DIABETES AND PRE-ECLAMPSIA: A RETROSPECTIVE CROSS-SECTIONAL STUDY OF PREGNANCY OUTCOMES

Objective

Despite growing knowledge of the pathophysiology leading to the development of preeclampsia (PreE) and diabetes mellitus (DM), the interaction between the two disease processes needs to be further examined. This study compared normal pregnancies to those complicated with preE, gestational diabetes mellitus (GDM), and/or pre-existing diabetes in order to assess the effects of elevated glucose on placental development and its potential role in the pathogenesis of preE.

Methods

The chart review was performed in an IRB approved retrospective cross-sectional study of live born singleton deliveries. A total 621 subjects were randomly selected from deliveries occurring between 2008 to 2011 at Baylor Scott & White Memorial hospital. Statistical analysis was performed using Duncan's post-hoc test and ANOVA.

Results

Patients who developed preE had higher systolic and diastolic blood pressures than those who did not develop preE (p<0.05). Patients with either pre-existing diabetes or GDM were older. There was no difference among groups for gravidity (p=0.21) with an average gravidity of 2.7 (1.8SD) for 621 subjects and a range of 1 to 14 pregnancies. Patients with preE delivered earlier in pregnancy than those without preE regardless of diabetes status. However, those with preE and pre-existing diabetes delivered significantly earlier at 35.0+/−0.4 than the other two preE groups (*p<0.05 for each), suggesting more severe condition. Additionally, patients with pre-existing diabetes who developed preE delivered smaller babies than those with pre-existing diabetes without preE (1.00±0.03, p<0.05 for each). However, the development of GDM did not result in smaller babies for those pregnancies with preE.

Conclusions

The development of preE in those with pre-existing diabetes led to growth restriction and more severe disease as evidenced by lower birth weights and earlier gestational ages at delivery. These differences were not seen in GDM pregnancies. This supports the concept that elevated glucose levels during placental development in the first trimester may alter the placenta and lead to restriction later in pregnancy when a second stimulus triggers preE.

ID: 57: PRE-GESTATIONAL DIABETES AND PREECLAMPSIA IN BANGLADESHI PATIENTS: A RETROSPECTIVE STUDY

Objective

Preeclampsia (PreE) is one of considerable public health threat particularly in developing countries globally affecting approximately 8% of all pregnancies. PreE is a pregnancy-specific condition that increases maternal and infant mortality and morbidity, but the etiology remains unknown. Despite numerous basic, clinical, and epidemiologic studies that have been conducted over the past half century, knowledge of the etiology and pathogenesis of preeclampsia remains elusive. It is diagnosed by new onset increased blood pressure and proteinuria during second or third trimester of gestation; key features of the preeclampsia category include a cut-off blood pressure of 140/90 mm Hg or higher and absolute requirement of proteinuria. Approximately 20% of the diabetic pregnant women develop preE. The mechanisms contributing to this effect is not well characterized. In a recent study, we have shown that hyperglycemia impairs cytotrophoblast (CTB) function via stress signaling. Several researchers demonstrate a direct link between preE and diabetes. The objective of the study was to evaluate potential linkage between the risk of developing preE and the presence of diabetes in pregnant patients in Bangladesh.

Methods

This is a cross-sectional study of 351 pregnant women performed to evaluate the prevalence of PreE with respect to different risk factors such as previous pregnancy, presence of Antiphospholipid antibodies, pre-existing diabetes (before this pregnancy), multiple gestation / singleton, family history of preE in first degree relative (mother, sister and daughters; most commonly mother), maternal age of 40 or greater. The study was conducted in selected hospitals of Dhaka city, Bangladesh during December 2013 to December 2015.

Results

The key study findings revealed that the overall rate of development of PreE in Bangladeshi pre-gestational diabetic patients is 22.6 percent. We gave special emphasis on the occurrence of PreE in pre-gestational diabetic patients. Among 351 respondents, 145 Patients (25.5%) with either DM prior to pregnancy or developing gestational diabetes or without diabetes were older (age >35 years) pregnant women (13.1%). Prevalence of PreE is 25.5 (n=145) and 19.6 (n=199) percent among those who developed pre-gestational diabetes and without diabetes prior to pregnancy. Of the respondents 17.2 percent have both systolic and diastolic hypertension those who developed DM prior to this pregnancy and 13 percent among those who does not developed DM prior to this pregnancy. Occurrence of abortion was up to 3 percentage before this pregnancy 45 percentage who developed DM prior to this pregnancy and 35 percent who does not have diabetes among the respondents.

Conclusions

There is an association has been found between the risk of developing preE and the presence of diabetes in pregnant patients in Bangladesh.

Status of Serum Zinc in Multidrug Resistant Tuberculosis

Zinc plays a vital role in the immune status. Its deficiency affects host defense by reducing the number of circulating T cells and phagocytosis activity of other cells which ultimately impair cell mediated immunity. The cell-mediated immunity plays a major role in the causation of pulmonary tuberculosis. The present study was carried out to estimate serum zinc level in newly detected multidrug resistant tuberculosis (MDR-TB) in adult population. In this study total fifty (50) MDR-TB patients were enrolled conveniently from the in-patients departments of National Institute of Diseases of the Chest Hospital (NIDCH), Bangladesh. Serum zinc was estimated by atomic absorption spectrophotometry method from early morning fasting blood sample. Serum zinc level was assessed according to normal cut-off value 70-120 μgm/dl and 76% studied population were found lower than this value. The mean±SD serum zinc level was observed 60.40±8.91 μgm/dl. No associations were found between serum zinc level with age (p=0.11) and with sex (p=0.085) of the study population respectively. The low level of serum zinc in MDR-TB patients suggested impaired immune status of our study population.

Clinico-pathological profile of dengue syndrome: an experience in a tertiary care hospital, Dhaka, Bangladesh

Dengue is the fastest emerging arboviral infection and became a major public health concern in tropical and subtropical countries. Dengue infections can result in a wide spectrum of disease severities ranging between dengue fever (DF) to the life-threatening dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS). This study was performed to find out the varied presentations and laboratory findings to put forward an overview about dengue syndrome in Bangladesh, in order to create better awareness and diagnostic skills among the health care providers. This hospital based observational study was conducted in the department of Medicine, Square Hospitals Ltd. during January, 2008 to December, 2010. A total of 262 adult subjects of both sexes having dengue syndrome were included in this study. Dengue syndrome was common in younger age group and the majority (72%) was below 45 years of age. All the patients had fever and the majority had malaise (96%), severe headache (72%) and musculoskeletal pain (65%). Skin rash (47%) was the commonest hemorrhagic manifestation while tourniquet test (49%) and low pulse pressure (37%) were the commonest clinical signs. All had thrombocytopenia (100%) and the majority had leukopenia (84%) and elevated liver transaminase (ALT-74%, AST-88%). Most of the subjects developed anti dengue antibody (IgM-92%, IgG -72%). All subjects survived.

Efficacy of Low Dose Low Molecular Weight Heparin in the Treatment of Cutaneous Lichen Planus

Introduction: Lichen planus is a common pruritic, inflammatory disease of the skin, mucous membranes, nail and hair follicles. Low dose low molecular weight heparin is administered in the treatment of cutaneous lichen planus. Objective: The objective is to evaluate the efficacy of low dose low molecular weight heparin in the treatment of cutaneous lichen planus. Materials and Methods: An interventional study was carried out in the department of Dermatology and Venereology, Combined Military Hospital (CMH), Dhaka. Total thirty seven patients of cutaneous lichen planus were selected by purposive type non-probability sampling technique. Data were collected by face to face interview and clinical examination. Results: It was observed that before treatment, the score of cutaneous lichen planus lesion was 6.83 ± 1.30 and after treatment was 3.83 ± 1.18 and ‘t’ test was found statistically significant (P<0.05). Improvement was shown in 26 (70.27%) cases. Out of these, response was good in 23 (88.46%), fair in 2 (7.69%) and poor in 1 (3.85%) cases. Conclusion: The study revealed that low dose low molecular weight heparin has remarkable efficacy profile as treatment option for cutaneous lichen planus. DOI: http://dx.doi.org/10.3329/jafmc.v9i1.18717 Journal of Armed Forces Medical College Bangladesh Vol.9(1) 2013: 2-7

Percutaneous nephrolithotomy--a versatile technique for both simple and complex renal stone

Percutaneous Nephrolithotomy is currently the preferred first line treatment for simple & complex renal calculi. The technique also being used increasingly for smaller stones that have failed ESWL. Aim of the study is to share our experience in PCNL in course of time. This study was conducted from January 2009 to December 2012, 131 patient's with 142 renal units of 5-75 yrs of age, PCNL were performed in NIKDU, BSMMU & JBFH. Stone were classified into simple (isolated renal pelvis or isolated calyceal stones) or complex (partial or complete staghorn stones, renal pelvic stone with accompanying calyceal stones). The stone size was 1.5-5cm approximately. We asses our initial puncture technique, need for multi-tract, supra 12th rib access, stone free rate, operative duration, postoperative complication, number of transfusion and hospital stay. Operative durations were 60 min -180 minutes. Puncture technique improved in course of time. 14 patients need multi-puncture and tract, all are supra 12th access. Out of 142 renal units 120 (83%) were stone free after first procedure, another 22 need and auxiliary procedure, (5 2nd look PCNL, 6 URS, 11 ESWL) to become stone free result in a 95% stone free rate. Complications occurred in 17 procedures which dealt accordingly. This study revealed PCNL is an effective, versatile safe and cosmetically acceptable procedure for all age groups in simple and complex renal stone.

Evaluation of serum lipid profile in patients with hypertension living in a coastal region of Bangladesh

Serum lipid levels are greatly controlled by genetic and environmental factors. When investigating the relationship between lipid disturbances and hypertension it is necessary to use local data on blood lipid profile in each region. Unfortunately, there is no literature reporting the lipid profile in hypertensive patients in coastal region of Bangladesh. The present study was conducted as a case-control study with 100 hypertensive patients as cases and equal number of normotensive individuals as controls. Socio-demographic, anthropometric and clinical data of both patients and controls were collected. Serum lipid parameters were analyzed biochemically. Independent sample t-test, Chi-Square test and Pearson's correlation test were done for the statistical analysis using the statistical software package SPSS. Our study found that serum total cholesterol (TC), triglyceride (TG), LDL, VLDL, TC/HDL, LDL/HDL were significantly higher (p<0.05) whereas the level of HDL cholesterol was significantly lower in hypertensive patients as compared to control subjects (p<0.05). Pearson's correlation analysis reveals that HDL cholesterol was inversely correlated with systolic and diastolic blood pressure in both patient and control groups. But serum TC, TG, LDL and HDL cholesterol were directly correlated with systolic and diastolic blood pressure in both groups. This study explored that hypertensive patients have higher level of TC, TG, LDL and VLDL cholesterol but lower level of HDL cholesterol than the normotensive subjects. Routine investigation of lipid profile in hypertensive patients may help to prevent further aggravation and risks of coronary artery diseases.

Renal function impairment in Hypothyroidism

Background: Hypothyroidism is an important public health problem in Bangladesh. It is associated with increased risk for atherosclerosis and other complications. The frank development of hypothyroidism is associated with metabolic derangements including dyslipidemia- which is an etiopathologic factor for development of renal impairment. This study was to evaluate whether hypothyroidism is associated with impaired renal function. Methods: Using a cross sectional analytical study design, a total of 111 subjects attending Out Patient Department, Center for Nuclear Medicine and Ultrasound, Bogra Medical College during January 2007 to December 2007 were included purposively. Eighty newly diagnosed hypothyroid patients (Group I) and 31 healthy adults (Group II) were enrolled in this study. Serum thyroid stimulating hormone and serum free thyroxine were assayed by radioimmunoassay. Serum fasting lipid profile, serum creatinine and serum uric acid were estimated by enzymatic colorimetric method. Estimated GFR was calculated using MDRD equation. Results: The mean (±SD) age of in Group I and Group II were 35.59 (±6.91) and 37.35 (±2.78) years and were comparable. In Group I, there were 66 females and 14 males. In Group II, there were 16 females and 15 males. The mean BMI was 25.49 ±2.17 kg/m2 in Group I and 24.24 ±1.99 kg/m2 in Group II. The mean (±SD) Serum total-cholesterol, LDL- cholesterol and tryacylglycerol in Group I were significantly higher than that in Group II. Serum HDL cholesterol in Group I was significantly lower than that in Group II (p<0.001). The mean (±SD) serum creatinine was significantly higher in Group I than Group II (P<0.001). The estimated glomerular filtration rate (eGFR) was lower in Group I compared to Group II (p=0.011). In Group I (Hypothyroid), there were significant correlations of BMI, S Total-Cholesterol, S HDLCholesterol, S LDL-Cholesterol, S triglycerides and S creatinine with serum TSH level. In Group I (Hypothyroid), there were significant positive correlations of BMI and TSH with serum creatinine. Conclusions: Hypothyroidism is associated with dyslipidemia, hyperuricemia and impaired renal function. Therefore, patients presenting with these biochemical abnormalities are recommended to be investigated for hypothyroidism and vice versa. DOI: http://dx.doi.org/10.3329/bjmb.v6i1.13283 Bangladesh J Med Biochem 2013; 6(1): 19-25

Effectiveness of levofloxacin in enteric fever

This intervention study was conducted to determine the efficacy of Levofloxacin in the treatment of uncomplicated enteric fever. Among 100 patients, who were purposively selected for the study had presented sign and symptoms of enteric fever with blood culture positive salmonella in laboratory findings during the admission in the department of Medicine, Uttara Adhunik Medical College & Hospital, Dhaka. Patients who fulfilled the diagnostic criteria were enrolled in the study and divided into two groups. One group was treated with oral levofloxacin 750mg once daily (OD) and another was injected with Levofloxacin 500mg once daily for 7 days. All the patients were examined twice daily to observe the clinical cure or failure of levofloxacin. Study was conducted from January 2008 to December 2008. Statistical analysis was performed by using statistical software SPSS version 12. Among the 100 patients in the study, majority of them 46(92%) were aged between 15 to 25 years, the next group was between 25 to 35 years 26(52%) and only three patients were aged above 65 years. Significant number of the patients were male (67), and the rest of them were female. The patients were clinically examined specially for anaemia, jaundice, caecal gurgling, hepatosplenomegaly in both the groups and the relevant investigations were performed. It was found that 46 patients in group A, who took oral levofloxacin, were cured after seven days, whereas 48 patients in group B were fully cured by taking injectable levofloxacin by seven days. In this study, levofloxacin was found to be the most effective drug in both oral and injectable form in one-week treatment of uncomplicated typhoid.

Contribution of angiogenic factors in a rat model of pre-eclampsia

BACKGROUND/AIMS

Pre-eclampsia is a disorder that results in significant feto-maternal complications with yet no definitive pharmacologic intervention. One postulated etiologic mechanism is an imbalance between circulating pro-angiogenic and anti-angiogenic factors. We investigated these factors sequentially throughout pregnancy (19-21 days) in our rat model of pre-eclampsia, which involves the imposition of excessive volume expansion.

METHODS

We evaluated the status of the pro-angiogenic and anti-angiogenic factors at the following time points: 3-5, 7-10 and 17-20 days of gestation.

RESULTS

We have previously determined that the urinary excretion of the circulating bufodienolide, marinobufagenin, is elevated at the 3- to 5-day time period, prior to the advent of hypertension and proteinuria. At 3-5 days of pregnancy, there was no evidence of angiogenic imbalance in the normal pregnant (NP) and 'pre-eclamptic' (PDS) rats. At the 7- to 10-day time point, plasma PlGF was greater in the NP rats than in the PDS group (p < 0.05). The plasma sFlt-1/PlGF ratio in the PDS animals was greater than that in the NP rats (p < 0.05). The placental sFlt-1 and sFlt-1/PlGF ratio were greater in the PDS rats than in NP rats (p < 0.05). These changes were also present at the 17- to 20-day time point in both plasma and placenta. The administration of resibufogenin, an antagonist of marinobufagenin, early in pregnancy, prevented angiogenic imbalance.

CONCLUSION

We conclude that angiogenic imbalance plays a role in the pathogenesis of pre-eclampsia in this rat model. Furthermore, the earliest event in the pathogenetic sequence appears to be the secretion and elaboration of marinobufagenin.

Marinobufagenin, resibufogenin and preeclampsia

The bufodienolides are cardiac glycosides which have the ability to inhibit the enzyme, Na(+)/K(+) ATPase (sodium potassium adenosine triphosphatase). They are cardiac inotropes, cause vasoconstriction (and, potentially, hypertension) and are natriuretic. Evidence has accrued over time which supports the view that they are mechanistically involved in volume expansion-mediated hypertension. In this communication, the authors summarize data which support the view that the bufodienolides and, in particular, marinobufagenin (MBG) are involved in the pathogenesis of preeclampsia. In a rat model of the syndrome, MBG causes hypertension, proteinuria, intrauterine growth restriction and increased weight gain. All of these phenotypic characteristics are prevented by an antagonist to MBG, resibufogenin (RBG). The "preeclamptic" animals also develop a vascular leak syndrome, resulting in hemoconcentration. Abnormalities in the MAPK (mitogen-activated protein kinase) system play a role in the mechanism by which MBG produces the abnormalities in the pregnant rat. Studies to discover the relevance of these findings to human preeclampsia are currently underway in several laboratories and clinics.

Effects of resibufogenin in experimental hypertension

BACKGROUND/AIMS

There are two major pathophysiologic processes involved in the development of hypertension: (1) expanded extracellular fluid volume and (2) vasoconstriction. We have developed a model of preeclampsia in the rat, in which excessive volume expansion (VE) plays a role. These animals excrete increased amounts of the bufodienolide, marinobufagenin (MBG), even before their hypertension and proteinuria become established. Furthermore, their hypertension is corrected by administration of resibufogenin (RBG), a compound structurally similar to MBG.

METHOD

We studied two models of experimental hypertension in the nonpregnant animal, produced either by deoxycorticosterone acetate (DOCA)-salt administration or by angiotensin infusion.

RESULTS

RBG administered to the DOCA-salt rats lowered blood pressure and reduced proteinuria in the VE animals, but had no affect on the rats infused with angiotensin. Furthermore, although the production of superoxide anion in the aortas of both groups of hypertensive rats was increased over control, RBG reduced these levels to normal in the VE (DOCA-salt) animals only. RBG had no effect in the angiotensin-infused rats. The urinary excretion of angiotensinogen did not rise in VE-mediated hypertension, but did increase in the angiotensin-infused rats.

CONCLUSIONS

MBG plays an important role in the causation of hypertension in the VE rats, but not in the vasoconstrictive model. RBG is effective only in VE-mediated hypertension.

Microbiological quality changes in the intestine of hybrid tilapia (Oreochromis niloticus x Oreochromis aureus) in fresh and frozen storage condition

AIMS

The goal of this study was to monitor the quantitative and qualitative bacterial flora in the intestine of hybrid tilapia in fresh fish and fish kept in frozen storage conditions for 1 year.

METHODS AND RESULTS

Quantitative and qualitative analyses of the bacterial flora associated with the intestine of hybrid tilapia (Oreochromis niloticus x Oreochromis aureus) in fresh fish and fish kept in frozen storage conditions for 1 year were carried out. In fresh and frozen fish, aerobic plate count (APC) ranged from 1.6 +/- 1.2 x 10(8) to 1.5 +/- 0.9 x 10(5) CFU g(-1) in the intestine of tilapia collected from pond 1, 8.7 +/- 2.3 x 10(7) to 6.5 +/- 3.8 x 10(4) CFU g(-1) in the intestine of tilapia from pond 2, and 1.9 +/- 2.9 x 10(8) to 6.2 +/- 2.8 x 10(4) CFU g(-1) in the intestine of tilapia from pond 3. APC for all the groups of fish decreased c. 2-log cycles after 1 months frozen storage; thereafter, counts slowly declined during frozen storage for 1 year. Altogether, 16 bacterial genera were identified: Gram-negative rods (67%) dominated. Both in fresh and frozen conditions, four bacterial species viz. Shewanella putrefaciens, Corynebacterium urealyticum, Aeromonas hydrophila and Flavobacterium sp. were always present, with a prevalence of 10% in most cases. Shewanella putrefaciens was the most dominant organism (15% of the total isolates) throughout the studied period. During frozen storage some of the bacteria were not recovered, but most of the bacteria survived after prolonged freezing.

CONCLUSIONS

This study describes the aerobic heterotrophic microflora found in the intestine of fresh and frozen tilapia. The unique aspect of this study concerns the data revealing the micro-organisms, which are viable after prolonged freezing. Contamination of edible portions of fish could originate from gastrointestinal sources.

SIGNIFICANCE AND IMPACT OF THE STUDY

The present results may enhance knowledge in controlling the storage life of fish, and fish product quality. Bacterial activity is by far the most important factor influencing fish quality, so bacterial numbers can be used as an index of quality. Storage of frozen tilapia without evisceration could be avoided.

Mucoepidermoid carcinoma of the lung--a case report

Mucoepidermoid carcinoma is an uncommon primary lung tumor. Mucoepidermoid carcinomas have been reported in all age group and equally in both sexes. A case of mucoepidermoid carcinoma histologically confirmed by biopsy is reported here. The patient is a 15 years old male presented with cough and dyspnoea for 5 days. Chest roentgenography showed segmental consolidation of right lower lobe. Chest computed tomography revealed a soft tissue mass with calcification within the lumen of lower trachea in precarinal location. The patient underwent thoracotomy for endotracheal mass and resection was done. Following operation, the patient is symptom free and follow-up CT scan shows normal tracheal outline.

Sodium bicarbonate solution nebulization in the treatment of acute severe asthma

This is a case report of a 15-year-old asthmatic girl who was admitted with a severe acute attack of bronchial asthma who eventually recovered, possibly with the help of sodium bicarbonate solution nebulization.

L* protein of Theiler's murine encephalomyelitis virus is required for virus growth in a murine macrophage-like cell line

We sought to confirm the importance of L* protein for growth of Theiler's murine encephalomyelitis virus (TMEV) in a macrophage-like cell line, J774-1. The protein is out of frame with the polyprotein and synthesized in DA but not GDVII subgroup strains of TMEV. A recombinant virus, DANCL*/GD, which substitutes the DA 5' noncoding and L* coding regions for the corresponding regions of GDVII and synthesizes L* protein, grew with little restriction in J774-1 cells. In contrast, another recombinant virus, DANCL*-1/GD, which has an ACG rather than an AUG as the starting codon of L* protein at nucleotide 1079, resulting in no synthesis of L* protein, did not grow well. No significant difference between the rates of adsorption to J774-1 cells of these viruses was observed. RNase protection assay demonstrated that DANCL*/GD viral RNA significantly increased, whereas only a minimal increase was observed for DANCL*-1/GD. The present study suggests that L* protein is required for virus growth in macrophages.

Heterosis in F1 hybrids derived from crosses of adapted Australian wheats

Data on the level of heterosis for grain yield under Australian dryland wheat growing conditions is essential before any decision can be made to commit resources to hybrid wheat breeding. Experiments were conducted at Narrabri, N.S.W., to determine the level and stability of heterosis for grain yield expressed by F1 hybrids derived from crosses of adapted Australian varieties. The hybrids and their parents were grown in hill plots in replicated experiments at three sowing times for two years (six environments). The hybrids outyielded their parents in each of the six environments with levels of mid- and high-parent heterosis up to 31.5 and 26.8%, respectively. The best hybrid outperformed the best check variety by an average yield margin of 18.2%. The hybrids were marginally but not significantly more stable in their yield performance across environments than their parents. While heterosis for grain protein content was generally negative, some hybrids were superior to the check varieties for both grain yield and protein content. Yield component analysis revealed no consistent pattern by which the best hybrids obtained their yield advantage over their parents. The levels of heterosis and the absolute yield advantage displayed by the hybrids over the best pure line check varieties were sufficient to sustain the commercial production of hybrid wheats in northern N.S.W.