Dual neutralization of TNFR-2 and MMP-2 regulates the severity of <Emphasis Type="Italic">S. aureus</Emphasis> induced septic arthritis correlating alteration in the level of interferon gamma and interleukin-10 in terms of TNFR2 blocking

Severity of S. aureus septic arthritis is correlated to prolonged inflammation by inflammatory cytokines like TNF-α, IL-1β, and IL-6 even after successful elimination of bacteria. Role of TNF-α via TNFR2 is not well established in this aspect. IFN-γ induces TNF-α release from the macrophages augmenting the inflammatory arthritis. IL-10 modulates the levels of pro-inflammatory cytokines promoting resolution of inflammation. TNF-α-TNFR2 signaling upregulates both of these cytokines. Higher level of MMP-2 induction by inflammatory cytokines during arthritis promotes tissue destruction. Whether dual neutralization of TNFR-2 and MMP-2 regulates the severity of S. aureus arthritis by modulating local and systemic cytokine milieu mainly due to TNFR-2 blocking was an obvious question. Here, we attempted the effects of neutralization of MMP-2 and TNFR2 on S. aureus arthritis and its impact on pro-inflammatory cytokines and some other parameters related to tissue destruction. Reduction in arthritis index was noticed in infected mice treated with both MMP-2 inhibitor and TNFR2 antibody. Lowest levels of inflammatory cytokines, iNOS, RANKL, NF-κb, JNK kinase, ROS, and MPO, and lysozyme activity were observed in combined neutralization group at 9 and 15 dpi, but at 3 dpi, most of the above parameters remained elevated due to TNFR2 neutralization. Diminished IL-10 and IFN-γ levels as a result of TNFR2 neutralization at early and later phase of infection respectively might be responsible for these contrasting effects. Overall, it can be suggested that administration of MMP-2 inhibitor and TNFR2 antibody in combination is protective against the inflammation and tissue destruction associated with S. aureus infection during the arthritic episode.     

Association of metabolic syndrome in polycystic ovarian syndrome: an observational study

Objectives

To find out the prevalence of metabolic syndrome (MBS) in women with PCOS and assess their strength of association. Methods: Total 50 apparently healthy non-pregnant PCOS subjects of 15 to 35 years were studied for having the features of MBS from May 2006 to April 2007. MBS was diagnosed by National Cholesterol Education Program’s Adult Treatment Panel III 2001 criteria. Student’s t test & Mann-Whitney U test were used for statistical analysis.

Results

21 subjects out of 50 (42%) met criteria for the MBS. 15(71.5%) belonged to 26–35 years and six (20.7%) in 15–25 years. Prevalence of waist circumference > 88 cm were noted in 34%, HDL cholesterol< 50 mg/dl in 50%, triglycerides ≥ 150 mg/dl in 40%, BP ≥130/85 mm Hg in 50% and FBS≥ 110 mg/dl in 16%. Women with higher insulin resistance and free testosterone levels significantly (P<0.01) correlated with higher prevalence of MBS.

Conclusion

The metabolic syndrome and its individual components are common in PCOS, particularly among women with hyperinsulinemia and hyperandrogenism.     

Investigating a crow die-off in January–February 2011 during the introduction of a new clade of highly pathogenic avian influenza virus H5N1 into Bangladesh

We investigated unusual crow mortality in Bangladesh during January-February 2011 at two sites. Crows of two species, Corvus splendens and C. macrorhynchos, were found sick and dead during the outbreaks. In selected crow roosts, morbidity was ~1 % and mortality was ~4 % during the investigation. Highly pathogenic avian influenza virus H5N1 clade 2.3.2.1 was isolated from dead crows. All isolates were closely related to A/duck/India/02CA10/2011 (H5N1) with 99.8 % and A/crow/Bangladesh/11rs1984-15/2011 (H5N1) virus with 99 % nucleotide sequence identity in their HA genes. The phylogenetic cluster of Bangladesh viruses suggested a common ancestor with viruses found in poultry from India, Myanmar and Nepal. Histopathological changes and immunohistochemistry staining in brain, pancreas, liver, heart, kidney, bursa of Fabricius, rectum, and cloaca were consistent with influenza virus infection. Through our limited investigation in domesticated birds near the crow roosts, we did not identify any samples that tested positive for influenza virus A/H5N1. However, environmental samples collected from live-bird markets near an outbreak site during the month of the outbreaks tested very weakly positive for influenza virus A/H5N1 in clade 2.3.2.1-specific rRT-PCR. Continuation of surveillance in wild and domestic birds may identify evolution of new avian influenza virus and associated public-health risks.     

Improved Growth and Colchicine Concentration in Gloriosa Superba on Mycorrhizal Inoculation Supplemented with Phosphorus-Fertilizer

Background

Gloriosa superba produces an array of alkaloids including colchicine, a compound of interest in the treatment of various diseases. The tuber of Gloriosa superba is a rich source of colchicine which has shown anti-gout, anti-inflammatory, and anti-tumor activity. However, this promising compound remains expensive and Gloriosa superba is such a good source in global scale. Increase in yield of naturally occurring colchicine is an important area of investigation.

Materials and Methods

The effects of inoculation by four arbuscular mycorrhizal (AM), fungi, Glomus mossae, Glomus fasciculatum, Gigaspora margarita and Gigaspora gilmorei either alone or supplemented with P-fertilizer, on colchicine concentration in Gloriosa superba were studied. The concentration of colchicine was determined by high-performance thin layer chromatography.

Results

The four fungi significantly increased concentration of colchicine in the herb. Although there was significant increase in concentration of colchicine in non-mycorrhizal P-fertilized plants as compared to control, the extent of the increase was less compared to mycorrhizal plants grown with or without P-fertilization. This suggests that the increase in colchicine concentration may not be entirely attributed to enhanced P-nutrition and improved growth. Among the four AM fungi Glomus mossae was found to be best. The total colchicine content of plant (mg / plant) was significantly high in plants inoculated with Glomus mossae and 25 mg kg⁻¹phosphorus fertilizer (348.9 mg /plant) while the control contain least colchicine (177.87 mg / plant).

Conclusion

The study suggests a potential role of AM fungi in improving the concentration of colchicine in Gloriosa superba tuber.     

Accuracy of transcutaneous bilirubinometry in the preterm infants: a comprehensive meta-analysis

Background: Transcutaneous bilirubin (TcB) measurement is widely used in term babies. But its effectiveness till debated in preterm infants. So, our objective was to pool data to see the accuracy of transcutaneous bilirubinometry in preterm infants.

Method: MEDLINE, Embase, Cochrane Library database were searched from 2000 to July 2017. The included studies had compared TcB with total serum bilirubin (TSB) in preterm infants before phototherapy and data were presented as correlation coefficients. Data were extracted by two reviewers and checked for accuracy by the third reviewer. The risk bias assessments were done by an assessment quality assessment of diagnostic accuracy studies tool. Pooled correlation coefficient assed after Fisher’s z transformation and then converted to r.

Results: We included 28 studies; all those studies reported results as correlation coefficients. In combination of both sternal and forehead site measurement, our pooled estimates of r?=?0.82 (95% CI: 0.78–0.85) in random effect and r?=?0.803 (95% CI: 0.78–0.81) in fixed effect model. For separate sites of measurement of TcB pooled r for forehead and sternum were comparable, r?=?0.82 (95% CI: 0.78–0.85), and pooled correlation coefficient for the two devices JM103 and Bilicheck the estimated pooled r were also comparable (Pooled r?=?0.83).

Conclusion: Our study found that TcB measurement is well related with TSB values and can represent a reliable method for evaluating preterm infants with possible hyperbilirubinemia. Our findings support the use of investigated devices at both forehead and sternum sites in preterm infants.     

Death audit in the neonatal ICU of a tertiary care hospital in Bangladesh: a retrospective chart review

Background: Expectant reduction of neonatal mortality and formulation of preventive strategies can only be achieved by analysis of risk factors in a particular setting. This study aimed to document incidence of neonatal death and to analyze the risk factors associated with neonatal death.

Methods: This retrospective study was carried out in department of Neonatology, Bangabandhu Sheikh Mujib Medical University (BSMMU) over a 12-month period from January to December 2015. The newborns that died within 28 d of life were defined as “Cases” and “Control” were the surviving newborn discharged to home as healthy. Two birth weight and gestational age matched controls were taken for each case. Maternal, obstetric, and newborn characteristics were analyzed between both the groups. Data analysis was performed using SPSS version 20.0 (SPSS Inc., Chicago, IL). A probability of Results: During the study period, the proportion of death was 9.6% (64/612). Both in Chi-square analysis and in logistic regression analysis, less than four antenatal visits (odds ratio (OR) 2.78; 95% CI: 1.23–6.28, p?=?.014) and sepsis (OR 2.37; 95% CI: 1.07–5.26, p?=?.034) were found to be independent risk factors for deaths, whereas LUCS found to be protective for deaths (OR 0.40; 95% CI: 0.19–0.83, p?=?.015).

Conclusion: In conclusion, less than four antenatal visits and presence of sepsis were found to be independent risk factors whereas LUCS protective of newborn death.