Environmental Hazards And Its Impact On Human Health

This paper provides the insight view about the environmental hazards and its impact on human health. Environmental hazards means every type of disorder that occur in the environment .Hazards can present themselves to us in various media e.g. air, water. The influence they can exert on our health is very complex and may be modulated by our genetic makeup, psychological factors and by our perceptions of the risks that they present. Every year thousands of deaths are reported because of environmental hazards. Environmental hazards can affect a particular organ or body system, directly damaging it or leading to further complications. In this paper we discuss about various hazards such as physical hazards (electromagnetic radiation and ionizing radiation),chemical hazards (combustion of coal, petroleum), biological hazards (contamination of water) and psychosocial hazards (stress).And also various types of pollution caused by the environmental hazards which results in various health problems such as liver damage, chronic headaches, mental retardation or damage to reproductive organs. These hazards place extra stress on our bodies

Effect of vitamin A supplementation in category-I Pulmonary Tuberculosis patients in a Medical College in India: a rapid assessment analysis

Background: Tuberculosis is one of the major health problems affecting the global population causing immense morbidity and mortality. Studies have shown that a good antioxidant status of the body has immune protective role against tuberculosis and may be associated with a decreased risk of the disease and slower rate of progression. Objective of the study was planned to evaluate the beneficial effects of Vitamin A as add on therapy to the standard drug therapy in patients with sputum positive pulmonary tuberculosis.Methods: The study was done in a Tuberculosis clinic, Department of Internal Medicine, Stanley Medical College for duration of 6 months. All the newly diagnosed sputum positive pulmonary tuberculosis patients (18-55 years) attending the outpatient were taken for the study purpose. A Phase III, prospective, open, two arm parallel group, outpatient, randomized, active controlled study was done.Results: After two weeks of therapy, the number of patients with negative sputum smear was higher in the study group than the control group. Vitamin A supplementation resulted in an earlier elimination of tubercle bacilli from the sputum.Conclusions: This study shows that vitamin A as add on therapy to the existing standard therapy improves the clinical response and decreases the disease activity to a greater extent than with routine standard therapy alone

A comparative study of mebeverine and synbiotic combination in patients with diarrhoea predominant Irritable Bowel Syndrome in a Medical College in South India

Background: Irritable bowel syndrome (IBS) is a chronic, episodic functional gastrointestinal disorder characterized by abdominal pain / discomfort and altered bowel habits. Though it is considered as a functional disorder, the burden of the disease to the patients is very high and the quality of life becomes miserable. Currently available IBS therapies are mainly symptom oriented and have limited efficacy. Various studies had done so far which provide a clear rationale for the use of Synbiotic in this disorder. The objective of the study includes, this study was planned to compare the efficacy of Mebeverine + Synbiotic combination with Mebeverine and Synbiotic monotherapy in patients with diarrhoea predominant irritable bowel syndrome.Methods: The study was done in Department of Medical Gastroenterology, Rajiv Gandhi Government Hospital, Chennai for duration of one year. Patients with Irritable Bowel Syndrome (diarrhea predominant type), diagnosed within 1 year and attending outpatient department were taken. A randomized, Phase III, prospective, interventional, open label, outpatient, comparative study design was done. A total of 60 patients divided into 3 groups were finally selected for the study purpose.Results: Twelve weeks after completion of active drug therapy, the Mebeverine + Synbiotic combination improved all the symptoms of IBS except abdominal pain. Further it was evident that combination therapy had significant remission in stool frequency and consistency when compared with other groups.Conclusions: Combination of Mebeverine + Synbiotic is more effective in improving most of the troublesome symptoms in patients with diarrhea predominant irritable bowel syndrome than other therapies and also in maintaining remission, in terms of frequency and consistency of stools

Ferroelectric Properties and Transmission Response ofPZN-PT Single Crystals for Underwater Communication

Single crystal of Pb[(Zn1/3Nb2/3)0.91Ti0.09]O3 (PZN-PT) at the composition of morphotropicphase boundary (MPB) shows a very high electromechanical coupling coefficient, piezoelectriccoefficient, and dielectric constant compared to conventional PZT ceramics. These exceptionalproperties of these single crystals find enormous applications in medical ultrasound imaging andunderwater communication (Sonar). The growth of PZN-PT single crystals has been carried outby bottom-supported flux Bridgman method. There are many growth issues to be addressedduring the process of growth. The grown crystals are oriented and cut along <001> directionwith the crystal dimension of 8 x 6 x 1.5 mm3 for further analysis. The oriented crystals were poledat a rate of 1 kV/mm. The poled crystals have been characterised for dielectric, strain andpiezoelectric values. Further, the poled specimen were tested for transmitting response at variousfrequencies in acoustic test facility and the difficulties in their growth

Multiple Sublineages of Influenza A Virus (H5N1), Vietnam, 2005−2007

Clade 2.3.4 viruses that are dominant in southern China have now spread to northern Vietnam

CRAFTing Delivery of Membrane Proteins into Protocells using Nanodiscs

For the successfulgenerativeengineeringof functionalartificialcells,a convenientandcontrollablemeansof deliveringmembraneproteinsinto membranelipidbilayersis necessary.Herewereporta deliverysystemthatachievesthis by employingmembraneprotein-carryingnanodiscsandthecalcium-dependentfusionofphosphatidylserinelipidmembranes.We showthat lipidnanodiscscanfuse a transportedlipidbilayerwith the lipidbilayersof smallunilamellarvesicles(SUVs)or giantunilamellarvesicles(GUVs)whileavoidingrecipientvesiclesaggregation.Thisis triggeredby a simple,transientincreasein calciumconcentration,whichresultsin efficientand rapidfusionin a one-potreaction.Furthermore,nanodiscscan be loadedwithmembraneproteinsthatcan be deliveredintotargetSUVor GUVmembranesin a detergent-independentfashionwhileretainingtheirfunctionality.Nanodiscshavea provenabilityto carrya widerangeof membraneproteins,controltheiroligomericstate,and arehighlyadaptable.Giventhis, our approachmay be the basisfor the developmentof usefultoolsthat will allowbespokedeliveryofmembraneproteinsto protocells,equippingthemwith the cell-likeabilityto exchangematerialacrossouter/subcellularmembranes

Bench-to-bedside review : targeting antioxidants to mitochondria in sepsis

Peer reviewedPublisher PD

The polycomb group protein EZH2 is involved in progression of prostate cancer

Prostate cancer is a leading cause of cancer-related death in males and is second only to lung cancer. Although effective surgical and radiation treatments exist for clinically localized prostate cancer, metastatic prostate cancer remains essentially incurable. Here we show, through gene expression profiling(1), that the polycomb group protein enhancer of zeste homolog 2 (EZH2)(2,3) is overexpressed in hormone-refractory, metastatic prostate cancer. Small interfering RNA (siRNA) duplexes(4) targeted against EZH2 reduce the amounts of EZH2 protein present in prostate cells and also inhibit cell proliferation in vitro. Ectopic expression of EZH2 in prostate cells induces transcriptional repression of a specific cohort of genes. Gene silencing mediated by EZH2 requires the SET domain and is attenuated by inhibiting histone deacetylase activity. Amounts of both EZH2 messenger RNA and EZH2 protein are increased in metastatic prostate cancer; in addition, clinically localized prostate cancers that express higher concentrations of EZH2 show a poorer prognosis. Thus, dysregulated expression of EZH2 may be involved in the progression of prostate cancer, as well as being a marker that distinguishes indolent prostate cancer from those at risk of lethal progression.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/62896/1/nature01075.pd

The evolution and genetic diversity of avian influenza A(H9N2) viruses in Cambodia, 2015 – 2016

Low pathogenic A(H9N2) subtype avian influenza viruses (AIVs) were originally detected in Cambodian poultry in 2013, and now circulate endemically. We sequenced and characterised 64 A(H9N2) AIVs detected in Cambodian poultry (chickens and ducks) from January 2015 to May 2016. All A(H9) viruses collected in 2015 and 2016 belonged to a new BJ/94like h9-4.2.5 sub-lineage that emerged in the region during or after 2013, and was distinct to previously detected Cambodian viruses. Overall, there was a reduction of genetic diversity of H9N2 since 2013, however two genotypes were detected in circulation, P and V, with extensive reassortment between the viruses. Phylogenetic analysis showed a close relationship between A(H9N2) AIVs detected in Cambodian and Vietnamese poultry, highlighting cross-border trade/movement of live, domestic poultry between the countries. Wild birds may also play a role in A(H9N2) transmission in the region. Some genes of the Cambodian isolates frequently clustered with zoonotic A(H7N9), A(H9N2) and A(H10N8) viruses, suggesting a common ecology. Molecular analysis showed 100% of viruses contained the hemagglutinin (HA) Q226L substitution, which favours mammalian receptor type binding. All viruses were susceptible to the neuraminidase inhibitor antivirals; however, 41% contained the matrix (M2) S31N substitution associated with resistance to adamantanes. Overall, Cambodian A(H9N2) viruses possessed factors known to increase zoonotic potential, and therefore their evolution should be continually monitored

Quantitative real-time RT-PCR of CD24 mRNA in the detection of prostate cancer

BACKGROUND: Gene expression profiling has recently shown that the mRNA for CD24 is overexpressed in prostate carcinomas (Pca) compared to benign or normal prostate epithelial tissues. Immunohistochemical studies have reported the usefulness of anti-CD24 for detecting prostate cancer over the full range of prostate specimens encountered in surgical pathology, e.g. needle biopsies, transurethral resection of prostate chips, or prostatectomies. It is a small mucin-like cell surface protein and thus promises to become at least a standard adjunctive stain for atypical prostate biopsies. We tested the usefulness of real-time RT-PCR for specific and sensitive detection of CD24 transcripts as a supplementary measure for discriminating between malignant and benign lesions in prostatic tissues. METHODS: Total RNA was isolated from snap-frozen chips in 55 cases of benign prostatic hyperplasia (BPH) and from frozen sections in 59 prostatectomy cases. The latter contain at least 50% malignant epithelia. Relative quantification of CD24 transcripts was performed on the LightCycler instrument using hybridization probes for detection and porphobilinogen deaminase transcripts (PBGD) for normalization. RESULTS: Normalized CD24 transcript levels showed an average 2.69-fold increase in 59 Pca-cases (mean 0.21) when compared to 55 cases of BPH (mean 0.08). This difference was highly significant (p < 0.0001). The method has a moderate specificity (47.3%) but a high sensitivity (86.4%) if the cutoff is set at 0.0498. CD24 expression levels among Pca cases were not statistically associated with the tumor and lymph-node stage, the grading (WHO), the surgical margins, or the Gleason score. CONCLUSION: The present study demonstrates the feasibility of quantitative CD24 RNA transcript detection in prostatic tissues even without previous laser microdissection