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result(s) for
"Anbalagan, C."
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Towards Eradication of Malaria: Is the WHO’s RTS,S/AS01 Vaccination Effective Enough?
2021
Recent advances in mosquito eradication and antimalarial treatments have reduced the malaria burden only modestly. An effective malaria vaccine remains a high priority, but its development has several challenges. Among many potential candidates, the RTS,S/AS01 vaccine (Mosquirix
) remains the leading candidate.
This review aims to understand the advances in the RTS,S/AS01 vaccine, and future comments regarding the vaccine's effectiveness in malaria eradication. Literature review for the past five decades was performed searching PubMed, EMBASE Ovid, and Cochrane Library, with using the following search items: (\"malaria\" OR \"WHO's malaria\" OR \"Plasmodium falciparum\" OR \"RTS,S\" OR \"RTS,S/AS01\" OR \"RTS,S/AS02\" OR \"pre-erythrocytic malaria\" OR \"circumsporozoite\" OR \"Mosquirix\") AND (\"vaccine\" OR \"vaccination\").
RTS,S/AS01, a recombinant pre-erythrocytic vaccine containing
surface-protein (circumsporozoite) antigen, is safe, well-tolerated, and immunogenic in children. Three doses, along with a booster, have a modest efficacy of about 36% in children (age 5-17 months) and about 26% in infants (age 6-12 weeks) against clinical malaria during a 48-month follow-up. However, the efficacy varies among population subgroups and with the parasite strain, it reduces without a booster and offers protection for a limited duration. Because of its potential cost-effectiveness and positive public health effect, the vaccine is being investigated in a pilot program for mortality benefits and broader deployment.
The RTS,S/AS01 vaccine prevents malaria; however, it should be considered another addition to the malaria-control program and not as an eradication tool because of its relatively low to modest efficacy.
Journal Article
Sustainable Eco-Friendly Building Material – A Review Towards Compressed Stabilized Earth Blocks and Fire Burnt Clay Bricks
2023
The aim of the current research article is to provide a comprehensive review and discuss and conclude on two types of earth blocks i.e., stabilized compressed earth blocks and fire-burnt clay bricks. A direct correlation exists between the number of greenhouse gases emitted and the amount of coal used to manufacture the fire-burnt clay bricks. To address this issue, new construction materials have been developed. Compressed Stabilized Earth Blocks (CSEBs) is an enhanced earth-based masonry material as it is not burnt. CSEBs are manufactured by compressing the soil under pressure. Coal and other burning fuels are not used at any point in the manufacturing process of CSEBs. Environment-friendly and energy-efficient construction materials that encourage the sustainable development have grown significantly in the recent years, as the public have become highly conscious. Since the building materials are produced in local communities, the local resources are efficiently used, transportation costs get reduced and high-quality housing is made available to a large spectrum of people. Less time-consuming construction techniques and low labour demand results in increased strength, insulation and thermal characteristics, lower carbon emissions and embodied energy during the life cycle of the materials and exceptionally low levels of trash that can be easily disposed of. When locally-produced materials are used for building purposes, it creates jobs and is more eco-friendly, during the times of crisis. CSEB and conventional bricks require different amounts of energy and release significantly different amounts of carbon dioxide throughout the production process. A review of the construction process that utilizes clay bricks and CSEBs has been conducted using the data and reports from numerous research papers and organizations. According to this review, the Compressed Stabilized Earth Blocks outperform the fire-burnt clay bricks in terms of advantages. When it comes to creating new environment-friendly construction materials, the CSEBs remain a viable option.
Journal Article
An Experimental Study on Portland Pozzolana Cement Mixed with Natural Hydrocolloids
2024
To make a structure sturdier, the construction materials must be of higher quality. To enhance the structural qualities of fresh concrete, or improve the properties of hardened concrete, additives are added to concrete during the mixing process. To offset the high cost of chemically improving concrete, cost-effective substitutes are needed. Three hydrocolloids found in nature, namely Gum Arabic, Gum guar, and Tamarind kernel powder, have been investigated as potential concrete additives, within a range of 0.25 percent to 1.25 percent in increments, depending on the amount of cement used. The findings of the compressive strength test reveal a progressive improvement following the addition of natural hydrocolloids. Concrete strength reaches its peak at 0.75% of Gum Arabic, 0.50% of Gum guar, and 1% of Tamarind kernel powder. It is found that these hydrocolloids, when combined with concrete, improve its strength. Therefore, they may be used in the percentages specified in this study to control this effect. As an additional benefit, utilizing these hydrocolloids to improve concrete strength eliminates the need for biowaste disposal.
Journal Article
High-throughput Analysis Of Multiple Stress Pathways Using GFP Reporters In C. Elegans
2010
Stress-responsive genes belonging to multiple defensive pathways in the nematode C. elegans are cross-regulated by kinase signalling (AKT-1/-2, p38 MAPK) and transcription factors (DAF-16, SKN-1). This cross-talk between stress pathways implies that they are best regarded as a stress-response network (SRN), whose behaviour as a whole should be amenable to mathematical modelling. We have used GFP reporter strains to provide a rapid readout of expression levels for 24 genes, representing principal outputs and transcription factors in the heat-shock, metal-binding, oxidative stress, phase I & phase II detoxification, and genotoxic stress pathways. Acute toxicity data (up to ~24 h) has been generated for selected metal (presented here) and pesticide toxicants across a wide range of doses, and common response patterns identified. Mathematical modelling of these response data, informed by an understanding of the underlying genetic circuitry, should allow our model to predict the likely toxicity of pollutant mixtures. Future work will test the accuracy of such predictions, leading to an iterative process of model refinement.
Journal Article
Paradoxical Tuberculosis Immune Reconstitution Inflammatory Syndrome (TB-IRIS) in HIV Patients with Culture Confirmed Pulmonary Tuberculosis in India and the Potential Role of IL-6 in Prediction
by
Raja, Krishnaraj
,
Bhanu, Kesavamurthy
,
Menon, Pradeep A.
in
Acquired immune deficiency syndrome
,
AIDS
,
Antiretroviral drugs
2013
The incidence, manifestations, outcome and clinical predictors of paradoxical TB-IRIS in patients with HIV and culture confirmed pulmonary tuberculosis (PTB) in India have not been studied prospectively.
HIV+ patients with culture confirmed PTB started on anti-tuberculosis therapy (ATT) were followed prospectively after anti-retroviral therapy (ART) initiation. Established criteria for IRIS diagnosis were used including decline in plasma HIV RNA at IRIS event. Pre-ART plasma levels of interleukin (IL)-6 and C-reactive protein (CRP) were measured. Univariate and multivariate logistic regression models were used to evaluate associations between baseline variables and IRIS.
Of 57 patients enrolled, 48 had complete follow up data. Median ATT-ART interval was 28 days (interquartile range, IQR 14-47). IRIS events occurred in 26 patients (54.2%) at a median of 11 days (IQR: 7-16) after ART initiation. Corticosteroids were required for treatment of most IRIS events that resolved within a median of 13 days (IQR: 9-23). Two patients died due to CNS TB-IRIS. Lower CD4(+) T-cell counts, higher plasma HIV RNA levels, lower CD4/CD8 ratio, lower hemoglobin, shorter ATT to ART interval, extra-pulmonary or miliary TB and higher plasma IL-6 and CRP levels at baseline were associated with paradoxical TB-IRIS in the univariate analysis. Shorter ATT to ART interval, lower hemoglobin and higher IL-6 and CRP levels remained significant in the multivariate analysis.
Paradoxical TB-IRIS frequently complicates HIV-TB therapy in India. IL-6 and CRP may assist in predicting IRIS events and serve as potential targets for immune interventions.
Journal Article
COVID-19 influenced gut dysbiosis, post-acute sequelae, immune regulation, and therapeutic regimens
by
Khanna, Kushagra
,
Srinivasan, Hemalatha
,
Chinnappan, Sasikala
in
ACE2
,
Angiotensin-converting enzyme 2
,
Cells
2024
The novel coronavirus disease 2019 (COVID-19) pandemic outbreak caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has garnered unprecedented global attention. It caused over 2.47 million deaths through various syndromes such as acute respiratory distress, hypercoagulability, and multiple organ failure. The viral invasion proceeds through the ACE2 receptor, expressed in multiple cell types, and in some patients caused serious damage to tissues, organs, immune cells, and the microbes that colonize the gastrointestinal tract (GIT). Some patients who survived the SARS-CoV-2 infection have developed months of persistent long-COVID-19 symptoms or post-acute sequelae of COVID-19 (PASC). Diagnosis of these patients has revealed multiple biological effects, none of which are mutually exclusive. However, the severity of COVID-19 also depends on numerous comorbidities such as obesity, age, diabetes, and hypertension and care must be taken with respect to other multiple morbidities, such as host immunity. Gut microbiota in relation to SARS-CoV-2 immunopathology is considered to evolve COVID-19 progression via mechanisms of biochemical metabolism, exacerbation of inflammation, intestinal mucosal secretion, cytokine storm, and immunity regulation. Therefore, modulation of gut microbiome equilibrium through food supplements and probiotics remains a hot topic of current research and debate. In this review, we discuss the biological complications of the physio-pathological effects of COVID-19 infection, GIT immune response, and therapeutic pharmacological strategies. We also summarize the therapeutic targets of probiotics, their limitations, and the efficacy of preclinical and clinical drugs to effectively inhibit the spread of SARS-CoV-2.
Journal Article
RETRACTED ARTICLE: Multi objective dragonfly algorithm for congestion management in deregulated power systems
by
Anbalagan, P.
,
Saravanan, C.
in
Artificial Intelligence
,
Computational Intelligence
,
Engineering
2021
Congestion in transmission corridors are the major bother for deregulated power system’s operation. Generator rescheduling along with demand alteration is a traditional remedy for transmission line congestion. According to market clearing process, the system operator (SO) has to pay a certain amount of cost to the market participants for rescheduling the generation and demand. This kind of redispatch related congestion management (CM) procedure is mainly carried out to reduce the congestion cost, but they are failing to provide an attention in power systems security. The risky generator’s power shifts may diminish the voltage and transient stability of the power system. So power system security should be included in the congestion management procedure. In this proposed multi objective congestion management procedure, rescheduling of active power is carried out to improve/retain the power systems security along with a congestion cost reduction. Voltage security margin (λ) and corrected transient energy margin (CTEM) provides a measure for power system security level. Multi Objective Dragonfly Algorithm (MODA) is employed to trace the non dominated solutions for three conflicting objectives. Fuzzy decision making principle is applied to select the best Pareto solution depends on the objective’s significances. The goodness of the MODA optimization approaches is experimented in congestion alleviation of New England 39 bus systems and solutions are compared with some reputed methods.
Journal Article
Bone Targeted Parathyroid Hormone Antagonists for Prevention of Breast Cancer Bone Metastases
by
Ponnapakkam, Tulasi
,
Burow, Matthew E.
,
Saeg, Fouad
in
Animal models
,
Antagonists
,
Bioluminescence
2025
Background/Objectives: Advanced breast cancer patients may develop bone metastases, leading to severe pain, fractures, and mortality. Current treatments have limited efficacy, necessitating targeted therapy approaches. Bone metastatic breast cancer cells secrete PTHrP that promotes tumor growth and bone degradation. Previous PTH/PTHrP antagonists failed clinically due to short half-life and insufficient bone targeting. The present study evaluated the following two novel bone-targeted PTH antagonists fused to a collagen-binding domain (CBD) for enhanced bone localization: PTH(7-33)-CBD and [W2]PTH(1-33)-CBD. Methods: Intra-tibial and intra-iliac breast tumor models in mice were used to evaluate drug efficacy in reducing tumor burden and bone destruction. Results: Bioluminescent imaging, X-ray, and micro-CT analysis revealed that both drugs significantly reduced tumor burden and osteolysis compared to control, with [W2]PTH(1-33)-CBD additionally improving trabecular bone structure. Drug efficacy was confirmed in both intra-tibial and intra-iliac breast tumor models. Conclusions: These findings identify CBD-fused PTH/PTHrP antagonists as a promising therapeutic strategy for breast cancer bone metastases.
Journal Article
Genetic variation in the social environment affects behavioral phenotypes of oxytocin receptor mutants in zebrafish
by
Anbalagan, Savani
,
Nunes, Ana Rita
,
Oliveira, Rui F
in
Animal genetic engineering
,
Animals
,
Behavior, Animal
2020
Oxytocin-like peptides have been implicated in the regulation of a wide range of social behaviors across taxa. On the other hand, the social environment, which is composed of conspecifics that may vary in their genotypes, also influences social behavior, creating the possibility for indirect genetic effects. Here, we used a zebrafish oxytocin receptor knockout line to investigate how the genotypic composition of the social environment (G s ) interacts with the oxytocin genotype of the focal individual (G i ) in the regulation of its social behavior. For this purpose, we have raised wild-type or knock-out zebrafish in either wild-type or knock-out shoals and tested different components of social behavior in adults. G i xG s effects were detected in some behaviors, highlighting the need to control for G i xG s effects when interpreting results of experiments using genetically modified animals, since the genotypic composition of the social environment can either rescue or promote phenotypes associated with specific genes.
Journal Article