Antagonistic properties of seagrass associated Streptomyces sp. RAUACT-1: A source for anthraquinone rich compound

ObjectiveTo identify the antibacterial potential of seagrass (Syringodium isoetifolium) associate microbes against bacterial pathogens.MethodsEumeration of microbial associates were analyzed with leaf and root samples of Syringodium isoetifolium. MIC and MBC were calculated for bacterial pathogens with microbial associates. Phylogenetic and GC-MS analysis were calculated for Actinomycetes sp. (Act01) which was the most potent.ResultsOf the isolated microbial associates phosphatase producing bacterial isolates were identified as maximum [(261.78±35.09) CFU×10⁴/g] counts in root sample. Of the selected microbial isolates Actinomycete sp (Act01) showed broad spectrum of antibacterial activity against antibiotic resistant and fish bacterial pathogens. Phylogenetic analysis of Act01 showed maximum identities (99%) with the Streptomyces sp. (GU5500072). The 16s rDNA secondary structure of Act01 showed the free energy values as ?366.3 kkal/mol. The GC-MS analysis Act01 showed maximum retention value with 23.742 RT and the corresponding chemical class was identified as 1, 4-dihydroxy-2-(3-hydroxybutyl)-9, 10-anthraquinone 9, 10-anthrac.ConclusionsIn conclusion, Streptomyces sp. (GU045544.1) from Syringodium isoetifolium could be used as potential antibacterial agent.     

Probability Mapping to Determine the Spatial Risk Pattern of Acute Gastroenteritis in Coimbatore District,India, Using Geographic Information Systems (GIS)

Background:

Maps show well the spatial configuration of information. Considerable effort is devoted to the development of geographical information systems (GIS) that increase understanding of public health problems and in particular to collaborate efforts among clinicians, epidemiologists, ecologists, and geographers to map and forecast disease risk.

Objectives:

Small populations tend to give rise to the most extreme disease rates, even if the actual rates are similar across the areas. Such situations will follow the decision-maker''s attention on these areas when they scrutinize the map for decision making or resource allocation. As an alternative, maps can be prepared using P-values (probabilistic values).

Materials and Methods:

The statistical significance of rates rather than the rates themselves are used to map the results. The incidence rates calculated for each village from 2000 to 2009 is used to estimate λ, the expected number of cases in the study area. The obtained results are mapped using Arc GIS 10.0.

Results:

The likelihood of infections from low to high is depicted in the map and it is observed that five villages namely, Odanthurai, Coimbatore Corporation, Ikkaraiboluvampatti, Puliakulam, and Pollachi Corporation are more likely to have significantly high incidences.

Conclusion:

In the probability map, some of the areas with exceptionally high or low rates disappear. These are typically small unpopulated areas, whose rates are unstable due to the small numbers problem. The probability map shows more specific regions of relative risks and expected outcomes.     

Studies on physicochemical and nutritional properties of aerial parts of Cassia occidentalis L.

In the present, work chemical composition and nutritional value of aerial parts of Cassia occidentalis L. was studied. The aerial parts of C. occidentalis possess favorable physicochemical properties with good nutritional value, such as high energy value, crude fibers, and vitamin levels. The X-ray fluorescence spectrophotometry data revealed that the sample is rich in minerals, especially in Fe, Ca, K, and Mn. Further, minerals such as Mg, Zn, Cu, Na, P, and S are present in good amount and depicted the nutritional value of the selected material. The plant sample is rich in phytochemicals such as flavonoids, alkaloids, lignin, tannins, and phenols. The presence of phytochemical constituents was confirmed by gas chromatography–mass spectrometry profile and high-performance thin layer chromatography fingerprinting techniques. The findings stimulate the on-farm cultivation of C. occidentalis on a large scale to relieve the iron deficiency in local community, and it can be used as a dietary supplement to treat anemia.     

Informatics resources for tuberculosis--towards drug discovery

Integration of biological data on gene sequence, genome annotation, gene expression, metabolic pathways, protein structure, drug target prioritization and selection, has resulted in several online bioinformatics databases and tools for Mycobacterium tuberculosis. Alongside there has been a growth in the list of cheminformatics databases for small molecules and tools to facilitate drug discovery. In spite of these efforts there is a noticeable lag in the drug discovery process which is an urgent need in the case of emerging and re-emerging infectious diseases. For example, more than 25 online databases are available freely for tuberculosis and yet these resources have not been exploited optimally. Informatics-centered drug discovery based on the integration and analysis of both bioinformatics and cheminformatics data could fill in the gap and help to accelerate the process of drug discovery. This article aims to review the current standing of developments in tuberculosis-bioinformatics and highlight areas where integration of existing resources could lead to acceleration of drug discovery against tuberculosis. Such an approach could be adapted for other diseases as well.     

Psychosocial factors predicting survival after allogeneic stem cell transplant

Purpose

A primary aim was to assess the relative contribution of psychological factors, such as anxiety, depression and mental adjustment to cancer, to overall survival outcomes at a median follow-up of 2 years following allogeneic haematopoietic stem cell transplant (HSCT). A secondary aim was to ascertain if demographic, medical and psychosocial factors assessed prior to transplantation were predictors of survival for patients after accounting for post-transplant events.

Method

Between 2005 and 2011, 130 allograft patients completed the Mental Adjustment to Cancer Scale and Brief Symptom Inventory-18 as part of routine psychological assessment before undergoing transplantation. Survival status data were obtained, and predictors of survival status assessed and analysed using Cox-regression models.

Results

Thirteen percent experienced clinical levels of distress pre-transplant. None of the psychological factors predicted post-HSCT survival. In contrast, hierarchical multivariate analysis indicated that post-transplant factors (acute graft-versus-host disease and relapse post-transplant) predicted survival (Chi-square change, p?<?0.001). The addition of a series of pre-transplant psychosocial and medical variables further improved the prediction of survival (Chi-square change, p?=?0.01). In particular, relationship status (being single) (p?=?0.04) and increased somatic symptoms (p?=?0.02) pre-transplant were associated with shorter survival. Both variables were not associated with medical factors but were related to increased severity of anxiety and depressive symptoms as well as greater use of helpless-hopelessness and reduced fighting spirit adjustment response.

Conclusions

Despite the significant influence of acute post-transplant factors in predicting survival following allogeneic HSCT, multidisciplinary pre-transplant assessments are important in identifying patients who are likely to experience poorer survival outcomes.     

The mutational landscape of melanoma brain metastases presenting as the first visceral site of recurrence

Brain metastases are a major cause of melanoma-related mortality and morbidity. We undertook whole-exome sequencing of 50 tumours from patients undergoing surgical resection of brain metastases presenting as the first site of visceral disease spread and validated our findings in an independent dataset of 18 patients. Brain metastases had a similar driver mutational landscape to cutaneous melanomas in TCGA. However, KRAS was the most significantly enriched driver gene, with 4/50 (8%) of brain metastases harbouring non-synonymous mutations. Hotspot KRAS mutations were mutually exclusive from BRAF^V600, NRAS and HRAS mutations and were associated with a reduced overall survival from the resection of brain metastases (HR 10.01, p = 0.001). Mutations in KRAS were clonal and concordant with extracranial disease, suggesting that these mutations are likely present within the primary. Our analyses suggest that KRAS mutations could help identify patients with primary melanoma at higher risk of brain metastases who may benefit from more intensive, protracted surveillance.Subject terms: CNS cancer, Metastasis, Melanoma, Tumour biomarkers, Cancer