Differential gene expression in liver of colored broiler chicken divergently selected for residual feed intake

Feed constitutes about 60-70% of the total cost of poultry production. So maximizing the feed efficiency will reduce production cost. The rapid growth in the juvenile period is essential to achieve higher body weight. Therefore, identifying the genes and pathways involved in rapid growth at an early age with a lesser requirement of feed is of utmost importance to further economize the broiler production. The efficiency of feed utilization was measured using RFI (residual feed intake). The present study aimed to estimate the RFI (0-5 week) in a population of indigenously developed colored broiler sire line chicken as well as identifying the differentially expressed genes influencing RFI in high and low RFI groups. The liver samples of high and low RFI broiler chicken aged 35 days were used for microarray analysis. A total of 2798 differentially expressed genes (DEGs) were identified, out of which 913 genes were downregulated and 1885 were upregulated. The fold change varied from - 475.17 to 552.94. A subset of genes was confirmed by qRT-PCR, and outcomes were matched well with microarray data. In the functional annotation study of DEGs, the highest significant GO (Gene Ontology) terms in the biological process included protein transport, protein localization, regulation of apoptosis, and mitochondrial transport. Gene network analysis of these DEGs plays an important role to understand the interaction among genes. Study of the important genes which were differentially expressed and the related molecular pathways in this population may hold the potential for future breeding strategies for augmenting feed efficiency.

Assessing inequities in community health worker’s interaction and its impact in Uttar Pradesh, India

Given the high Neo-natal mortality in the state of Uttar Pradesh, India, an emphasis has been given to community health workers (CHW). CHW provides behavior push to pregnant women for utilizing health services, through the strategies of household contact and messaging. However, the disparity in health outcomes and interaction of CHW is profoundly affected by socio-economic determinants; still, the evidence is limited. This study aims to explore socio-economic inequities in quantity and quality of contacts by the CHW and its differential effect on health service utilization.

Multistage sampling design identified live births in the last 12 months across the 25 highest-risk districts of Uttar Pradesh(n = 3703). Regression models described the relation between household demographics and CHW contact & specific messaging and interactions of demographics and CHW contact & messaging in predicting health service utilization ( > = 4 antenatal care (ANC) visits, Institutional delivery and 100 iron folic acid (IFA) consumption).

No differential likelihood in contact of CHW and specific messaging is found. Further, association of CHW contacts and specific messaging with health outcomes were significantly affected by socio-economic determinants.2 or more contacts along with specific messaging increased the odds of 4+ ANC to a higher degree among illiterate women compared to literate women(AOR:3.39, 95% CI:2.28-5.04 vs AOR:1.44, 95% CI:1.09-1.92). Similarly, the odds of facility delivery increased to a higher degree among lower wealth women compared to higher wealth women (AOR:3.41, 95% CI:2.47-4.71 vs. AOR:1.53, 95% CI: 1.09-2.15).

Specific messaging, along with CHW contacts, have a higher magnitude of effects on the marginalized population. This study provides evidence for adjusting implementation strategies based on socio-economic determinants to achieve equitable health service utilization. However, further research on training of CHW on heterogeneous interaction is recommended

Key messages

There exists differential effects of quantity and quality of contact by community health workers on health service utilization across the different socio-economic strata. Implementation agencies in the LMIC can reduce health inequity by shifting from coverage-oriented target approach towards more prioritized and focused interaction across socio-economic groups.

Characterisation of caecum and crop microbiota of Indian indigenous chicken targeting multiple hypervariable regions within 16S rRNA gene

A comparative analysis of caecum and crop microbiota of chick, grower and adult stages of Indian indigenous chickens was conducted to investigate the role of the microbiota of the gastrointestinal tract, which play an important role in host performance, health and immunity. High-throughput Illumina sequencing was performed for V3, V4 and V4-V6 hypervariable regions of the 16S rRNA gene. M5RNA and M5NR databases under MG-RAST were used for metagenomic datasets annotation. In the crop, Firmicutes (~78%) and Proteobacteria (~16%) were the predominant phyla whereas in the caecum, Firmicutes (~50%), Bacteroidetes (~29%) and Actinobacteria (~10%) were predominant. The Shannon-Wiener diversity index suggested that sample richness and diversity increased as the chicken aged. For the first time, the presence of Lactobacillus species such as L. frumenti, L. antri, L. mucosae in the chicken crop along with Kineococcus radiotolerans, Desulfohalobium retbaense and L. jensenii in the caecum are reported. Many of these bacterial species have been found to be involved in immune response modulation and disease prevention in pigs and humans. The gut microbiome of the indigenous chicken was enriched with microbes having probiotic potential which might be essential for their adaptability.

Effect of laboratory-isolated Lactobacillus plantarum LGFCP4 from gastrointestinal tract of guinea fowl on growth performance, carcass traits, intestinal histomorphometry and gastrointestinal microflora population in broiler chicken

The study aimed to investigate the effect of feed supplements, viz Lactobacillus plantarum LGFCP4 (laboratory isolate from GIT of Guinea fowl), Lactobacillus acidophilus (NCDC, Karnal) and in-feed antibiotic bacitracin methylene disalicylate (BMD) on growth performance, FCR, carcass traits and immune organs weight, intestinal histomorphometry and gastrointestinal microflora population in broiler chickens. In a completely randomized design, CARIBRO-Dhanraja broiler chicks (n = 160) were used with four treatment groups. During the entire experimental duration of 35 days, treatment groups were provided with different dietary treatments (T1 - basal diet (negative control), T2 - antibiotic growth promoter BMD 20 g/100 kg feed (positive control), T3 - 1 × 10⁸  cfu of L. acidophilus/gm-fermented feed +MOS 1 g/kg feed and T4 - 1 × 10⁸  cfu of laboratory-isolated L. plantarum LGFCP4/gm-fermented feed+ MOS 1 g/kg feed. After 35 days of experimental period, no significant results have been observed in different growth performance traits among treatment groups. Cut-up parts and edible organs' weight remained unaffected by dietary supplementation, whereas weight of immune organs were significantly higher (p < 0.05) in L. plantarum LGFCP4-supplemented group. At the end of feeding trial, significantly (p < 0.05) lower E. coli count was observed in crop of T4 birds, while in ileum, T2 and T3 showed lower count. In caeca, T2 group showed lowest E. coli count. Salmonella count in crop and ileum was significantly (p < 0.05) low in T3 and T4, while in caeca, T2 group showed lowest count. In terms of histomorphometry, duodenal villous height (VH), crypt depth (CD) and VH:CD ratio were higher for T3 and T4 and lowest values were obtained for T2 group. The results of the study showed that L. plantarum LGFCP4 isolated from GIT of guinea fowl can effectively replace in-feed antibiotic growth promoters in broiler diets by altering intestinal villi morphology and improving the gut health by reducing the pathogenic microbial load.

Microenvironment-induced downregulation of miR-193b drives ovarian cancer metastasis

The cross-talk between ovarian cancer (OvCa) cells and the metastatic microenvironment is an essential determinant of successful colonization. Micro(mi)RNAs play several critical roles during metastasis; however, the role of microenvironmental cues in the regulation of miRNAs in metastasizing cancer cells has not been studied. Using a 3D culture model that mimics the human omentum, one of the principal sites of OvCa metastasis, we identified and characterized the microenvironment-induced downregulation of a tumor suppressor miRNA, miR-193b, in metastasizing OvCa cells. The direct interaction of the OvCa cells with mesothelial cells, which cover the surface of the omentum, caused a DNA methyltransferase 1 (DNMT1) mediated decrease in the expression of miR-193b. The reduction in miR-193b enabled the metastasizing cancer cells to invade and proliferate into human omental pieces ex vivo and into the omentum of a mouse xenograft model of OvCa metastasis. The functional effects of miR-193b were mediated, in large part, by the concomitant increased expression of its target, urokinase-type plasminogen activator (uPA), a known tumor-associated protease. These findings link paracrine signals from the microenvironment with the regulation of a key miRNA that is essential for the initial steps of OvCa metastatic colonization. Targeting miR-193b could prove effective in the treatment of OvCa metastasis.

3,3'-Diindolylmethane attenuates LPS-mediated acute liver failure by regulating miRNAs to target IRAK4 and suppress Toll-like receptor signalling

BACKGROUND AND PURPOSE

Acute liver failure (ALF) is a severe and potentially lethal clinical syndrome. 3,3'-Diindolylmethane (DIM) is a natural plant-derived compound with anti-cancer activities. Recently, DIM has also been shown to have anti-inflammatory properties. Here, we tested the hypothesis that DIM would suppress endotoxin-induced ALF.

EXPERIMENTAL APPROACH

We investigated the therapeutic potential of DIM in a mouse model of D-galactosamine/Lipopolysaccharide (GalN/LPS)-induced ALF. The efficacy of DIM treatment was assessed by survival, liver histopathology, serum levels of alanine transaminase, pro-inflammatory cytokines and number of activated liver macrophages. Effects of DIM on the expression of two miRNAs, 106a and 20b, and their predicted target gene were measured by qRT-PCR and Western blotting. Effects of DIM on the release of TNF-α from RAW264.7 macrophages transfected with mimics of these miRNAs and activated by LPS was assessed by elisa.

KEY RESULTS

DIM treatment protected mice from ALF symptoms and reduced the number of activated liver macrophages. DIM increased expression of miR-106a and miR-20b in liver mononuclear cells and decreased expression of their predicted target gene IL-1 receptor-associated kinase 4 (IRAK4), involved in signalling from Toll-like receptor 4 (TLR4). In vitro transfection of RAW264.7 cells using miRNA mimics of miR-106a and 20b decreased expression of IRAK4 and of TNF-α secretion, following LPS stimulation.

CONCLUSIONS AND IMPLICATIONS

DIM attenuated GalN/LPS-induced ALF by regulating the expression of unique miRNAs that target key molecules in the TLR4 inflammatory pathway. DIM may represent a potential novel hepatoprotective agent.

Direct sac puncture and glue embolization of intraosseous AVM of the maxilla

The authors report an intraosseous maxillary arteriovenous malformation (AVM) treated with direct sac injection of n-butyl-2-cyanoacrylate and transarterial embolization. The case is presented because of its rarity and the efficacy of direct puncture glue embolization.

Plant polyphenolics as anti-invasive cancer agents

Because invasion is, either directly or via metastasis formation, the main cause of death in cancer patients, development of efficient anti-invasive agents is an important research challenge. We have established a screening program for potentially anti-invasive compounds. The assay is based on organotypic confronting cultures between human invasive cancer cells and a fragment of normal tissue in three dimensions. Anti-invasive agents appeared to be heterogeneous with regard to their chemical nature, but plant alkaloids, polyphenolics and some of their synthetic congeners were well represented. Even within this group, active compounds were quite diverse: (+)-catechin, tangeretin, xanthohumol and other prenylated chalcones, 3,7-dimethoxyflavone, a pyrazole derivative, an isoxazolylcoumarin and a prenylated desoxybenzoin. The data gathered in this system are now applied in two projects. Firstly, structure-activity relationships are explored with computer models using an artificial neural network approach, based on quantitative structural descriptors. The aim of this study is the prediction and design of optimally efficient anti-invasive compounds. Secondly, the metabolism of orally ingested plant polyphenolics by colonic bacteria is studied in a simulator of the human intestinal microbial ecosystem (SHIME) and in human intervention trials. This method should provide information on the final bioavailability of the active compounds in the human body, with regard to microbial metabolism, and the feasibility of designing pre- or probiotics that increase the generation of active principles for absorption in the gastro-intestinal tract. The final and global aim of all these studies is to predict, synthesize and apply in vivo molecules with an optimal anti-invasive, and hence an anti-metastatic activity against cancer.

Purification, crystallization and preliminary X-ray diffraction studies of disintegrin (schistatin) from saw-scaled viper (Echis carinatus)

This is the first report of crystallographic data on a disintegrin molecule from any source. The heterodimeric disintegrin with a molecular weight of 14 kDa from Echis carinatus venom is a potent antagonist of alpha4 integrins. The intact disintegrin, containing two subunits A and B, was isolated and purified using affinity and ion-exchange columns. It has been crystallized using 1.6 M ammonium sulfate as a precipitating agent. The crystals grew to dimensions of 0.25 x 0.20 x 0.20 mm and diffracted to 2.5 A resolution. The crystals belong to space group I4(1)22, with unit-cell parameters a = b = 91.7, c = 55.1 A. Assuming a molecular weight of 14 kDa, a V(M) of 2.1 A(3) Da(-1) is obtained for one molecule of disintegrin in the asymmetric unit.

Induction of hepatic cytochrome P-450 by phenobarbital in semi-aquatic frog (Rana pipiens)

Hepatic microsomal cytochrome P450 (equivalent to rat P4502B1 isozymic form, a CYPIIB gene product) can be induced by pentobarbital (PB) in the adults of the semiaquatic frog, Rana pipiens (as in other terrestrial vertebrates), but not in adults of the aquatic frog Xenopus laevis or in bluegill sunfish (Lepomis macrochirus). The activity of PB-induced P450 (2B1) towards aldrin and pentoxyresorufin increases respectively by about 2- and 10-fold. This enzyme is not inducible during larval and postlarval stages of R. pipiens. However, cytochrome P4501A1 (CYPIA1 gene product) is inducible by beta-naphthoflavone in all these species. Both CYPIA and CYPIIB genes are expressed, as determined by the catalysis of their protein products, during larval, postlarval, and adult stages of R. pipiens. The concentration of P450 increases slightly during the postlarval stages until the adult stage, ready to migrate to land, is reached. This increase seems to be mostly due to 2B1-type cytochrome P450 as judged by a large increase in aldrin epoxidase but not of 7-ethoxyresorufin O-deethylase activity. It is hypothesized that the evolution of true terrestrialness, and not the evolution of air-breathing lungs alone, is required for the transcriptional activation of CYPIIB gene by PB.

An unusual sincipital meningoencephalocele: a case report

A congenital nasoglabellar mass is usually either a meningocele or an encephalocele. Occasionally, lipoma, sarcoma, dermoid, glioma, or scalp angioma may resemble an encephalocele. This report describes a rather unusual sincipital meningoencephalocele in an 8-month-old boy.