Unlocking Trehalose's versatility: A comprehensive Journey from biosynthesis to therapeutic applications.

For over forty years, a sugar of rare configuration known as trehalose (two molecules of glucose linked at their 1-carbons), has been recognised for more than just its roles as a storage compound. The ability of trehalose to protect an extensive range of biological materials, for instance cell lines, tissues, proteins and DNA, has sparked considerable interest in the biotechnology and pharmaceutical industries. Currently, trehalose is now being investigated as a promising therapeutic candidate for human use, as it has shown potential to reduce disease severity in various experimental models. Despite its diverse biological effects, the precise mechanism underlying this observation remain unclear. Therefore, this review delves into the significance of trehalose biosynthesis pathway in the development of novel drug, investigates the inhibitors of trehalose synthesis and evaluates the binding efficiency of T6P with TPS1. Additionally, it also emphasizes the knowledge about the protective effect of trehalose on modulation of autophagy, combating viral infections, addressing the conditions like cancer and neurodegenerative diseases based on the recent advancement. Furthermore, review also highlight the trehalose's emerging role as a surfactant in delivering monoclonal antibodies that will further broadening its potential application in biomedicines.

Phylodynamic Insights into Global Emergence and Diversification of the Tomato Pathogen Xanthomonas hortorum pv. gardneri.

The emergence of plant pathogens is often associated with waves of unique evolutionary and epidemiological events. Xanthomonas hortorum pv. gardneri is one of the major pathogens causing bacterial spot disease of tomatoes. After its first report in the 1950s, there were no formal reports on this pathogen until the 1990s, despite active global research on the pathogens that cause tomato and pepper bacterial spot disease. Given the recently documented global distribution of X. hortorum pv. gardneri, our objective was to examine genomic diversification associated with its emergence. We sequenced the genomes of X. hortorum pv. gardneri strains collected in eight countries to examine global population structure and pathways of emergence using phylodynamic analysis. We found that strains isolated post-1990 group by region of collection and show minimal impact of recombination on genetic variation. A period of rapid geographic expansion in X. hortorum pv. gardneri is associated with acquisition of a large plasmid conferring copper tolerance by horizontal transfer and coincides with the burgeoning hybrid tomato seed industry through the 1980s. The ancestry of X. hortorum pv. gardneri is consistent with introduction to hybrid tomato seed production and dissemination during the rapid increase in trade of hybrid seeds. [Formula: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Outcome of early detection approach in control of breast, cervical, and oral cancer: Experience from a rural cancer center in India.

In low- and middle-income countries most of the cancer patients attend the hospital at a late stage and treatment completion of these cases is challenging. The early detection program (EDP), in rural areas of Punjab state, India was initiated to identify breast, cervical, and oral cancer at an early stage by raising awareness and providing easy access to diagnosis and treatment. A total of 361 health education programs and 99 early detection clinics were organized. The symptomatic and self-interested (non-symptomatic individuals who opted for screening) cases visited the detection clinic. They were screened for breast, cervical, and/or oral cancer. Further diagnosis and treatment of screen-positive cases were carried out at Homi Bhabha Cancer Hospital (HBCH), Sangrur. Community leaders and healthcare workers were involved in all the activities. The EDP, Sangrur removed barriers between cancer diagnosis and treatment with the help of project staff. From 2019 to 2023, a total of 221,317 populations were covered. Symptomatic and self-interested individuals attended the breast (1627), cervical (1601), and oral (1111) examinations. 46 breast (in situ-4.3%; localized-52.2%), 9 cervical (localized-77.8%), and 12 oral (localized-66.7%) cancer cases were detected, and treatment completion was 82.6%, 77.8%, and 50.0%, respectively. We compared cancer staging and treatment completion of cases detected through EDP with the cases attended HBCH from Sangrur district in 2018; the difference between two groups is statistically significant. Due to the early detection approach, there is disease down-staging and improvement in treatment completion. This approach is feasible and can be implemented to control these cancers in low- and middle-income countries.

ThermoBRET: A Ligand-Engagement Nanoscale Thermostability Assay Applied to GPCRs.

Measurements of membrane protein thermostability reflect ligand binding. Current thermostability assays often require protein purification or rely on pre-existing radiolabelled or fluorescent ligands, limiting their application to established targets. Alternative methods, such as fluorescence-detection size exclusion chromatography thermal shift, detect protein aggregation but are not amenable to high-throughput screening. Here, we present a ThermoBRET method to quantify the relative thermostability of G protein coupled receptors (GPCRs), using cannabinoid receptors (CB1 and CB2 ) and the ß2 -adrenoceptor (ß2 AR) as model systems. ThermoBRET reports receptor unfolding, does not need labelled ligands and can be used with non-purified proteins. It uses Bioluminescence Resonance Energy Transfer (BRET) between Nanoluciferase (Nluc) and a thiol-reactive fluorescent dye that binds cysteines exposed by unfolding. We demonstrate that the melting point (Tm ) of Nluc-fused GPCRs can be determined in non-purified detergent solubilised membrane preparations or solubilised whole cells, revealing differences in thermostability for different solubilising conditions and in the presence of stabilising ligands. We extended the range of the assay by developing the thermostable tsNLuc by incorporating mutations from the fragments of split-Nluc (Tm of 87 °C versus 59 °C). ThermoBRET allows the determination of GPCR thermostability, which is useful for protein purification optimisation and drug discovery screening.

Long COVID among people with HIV: A systematic review and meta-analysis.

BACKGROUND: People with HIV might be at an increased risk of long COVID (LC) because of their immune dysfunction and chronic inflammation and alterations in immunological responses against severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2; coronavirus disease 2019 [COVID-19]). This systematic review aimed to evaluate the association between HIV infection and LC and the prevalence and characteristics of and risk factors for LC among people with HIV. METHODS: Multiple databases, including Embase, PubMed, PsycINFO, Web of Science, and Sociological Abstracts, were searched to identify articles published before June 2023. Published articles were included if they presented at least one LC outcome measure among people with HIV and used quantitative or mixed-methods study designs. For effects reported in three or more studies, meta-analyses using random-effects models were performed using R software. RESULTS: We pooled 39 405 people with HIV and COVID-19 in 17 eligible studies out of 6158 publications in all the databases. It was estimated that 52% of people with HIV with SARS-CoV-2 infection developed at least one LC symptom. Results from the random-effects model showed that HIV infection was associated with an increased risk of LC (odds ratio 2.20; 95% confidence interval 1.25-3.86). The most common LC symptoms among people with HIV were cough, fatigue, and asthenia. Risk factors associated with LC among people with HIV included a history of moderate-severe COVID-19 illness, increased interferon-gamma-induced protein 10 or tumour necrosis factor-α, and decreased interferon-ß, among others. CONCLUSIONS: The COVID-19 pandemic continues to exacerbate health inequities among people with HIV because of their higher risk of developing LC. Our review is informative for public health and clinical communities to develop tailored strategies to prevent aggravated LC among people with HIV.

Adverse Childhood Experiences and HIV-Related Stigma: A Quantitative Survey of Tanzanian Men, June 2019.

Experiencing adverse childhood experiences (ACEs) may impact personal opinions, attitudes, and judgments, which can further result in HIV-related stigma. HIV-related stigma consequentially may impact HIV preventive measures such as HIV testing, pre-exposure prophylaxis uptake, and condom use. The extent to which ACEs influence HIV-related stigma perception has not been well studied. Therefore, the study aimed to examine the association between ACEs and perceived and interpersonal HIV-related stigma among Tanzanian HIV-negative men. Quantitative survey data were obtained from the Tanzania STEP (Self-Testing Education and Promotion) project established in four wards: Mabibo, Manzese, Tandale, and Mwanyanamala. A total of 507 men responded to the ACEs and HIV-related stigma questionnaires. ACEs were operationalized as types of ACEs (environmental, physical/psychological, sexual abuse) and ACE score (0 (reference) vs. 1, 2, 3, ≥ 4). Perceived HIV-related stigma was analyzed both as a binary (HIV stigma vs. no HIV stigma) and a continuous variable. Unadjusted and adjusted multinomial logistic and linear regression models were used to assess the associations between ACEs and HIV-related stigma. ACE types were associated with HIV stigma (b = 0.237, 95% CI [0.122-0.352], p = < .0001). Findings of the adjusted multinomial logistic regression model show that experiencing one ACE (aOR = 1.9; p-value = 0.023), two ACEs (aOR = 1.8; p-value = 0.044), four or more ACEs (aOR = 4.1; p-value = < 0.0001) were associated with greater perceived HIV-related stigma. Moreover, experiencing environmental (aOR = 8.6; p-value = 0.005), physical/psychological (aOR = 2.5; p-value = 0.004), and sexual abuse (aOR = 3.4; p-value = < 0.0001) were associated with higher odds of HIV-related stigma. Our study findings suggest that those who experience childhood trauma are more likely to have a higher perception of HIV-related stigma. Intervention programs targeting HIV stigma should consider addressing ACEs entailing the behavioral and psychological impact of childhood trauma.

Stories of childhood sexual abuse (CSA) among older adults living with HIV (OALH) in South Carolina: a qualitative study.

Childhood sexual abuse (CSA) devastatingly impacts an individual's behavioral, psychological, and social health. Childhood, a developmental stage directly influenced by the home or school environment, leaves a life-long imprint. Compared with the general population, CSA prevalence is doubled among people living with HIV. Thus, the study aimed to explore CSA circumstances among older adults living with HIV (OALH) in South Carolina (SC). We included 24 OALH aged 50 and above who reported CSA. The data were collected at an immunology center in SC. In-depth semi-structured interviews were conducted, audio-recorded, transcribed, and analyzed using a thematic analysis approach. The iterative analytic process included a discussion of initial thoughts and key concepts, identification, and reconciliation of codes, and naming of emergent themes. Six themes emerged: known perpetrators, re-victimization, "nobody believed me", "cannot live like others", lack of CSA disclosure, and interconnections with other adverse childhood experiences (ACEs). CSA experiences and non-disclosure were found to be linked with shame, embarrassment, fear, and trust issues. Hence, trauma-focused interventions are required to resolve these issues and improve the quality of life of OALH with past trauma. Counseling or therapy programs should incorporate psychological and behavioral theoretical models to best target OALH who are CSA survivors.

Childhood sexual trauma and opioid use among older adults living with HIV.

Childhood sexual abuse (CSA) has been linked to substance use and substance use disorders in adulthood. However, there have been limited studies examining the relationship between CSA and opioid use among older adults living with HIV (OALH). Therefore, the aim of this study was to determine the association between CSA and opioid use among OALH (n = 91). Data were obtained from an HIV clinic population in South Carolina using paper-and-pen, and online questionnaires. CSA was operationalized using six questions from the Early Trauma Inventory-Self Report Form (Yes vs. No). Opioid use was self-report of the use of opioids including: heroin, fentanyl, Oxycontin, Vicodin, codeine, morphine (used vs. never used). Nested crude and multivariable logistic regression models adjusting for sociodemographic confounders were used to determine the association between CSA and opioid use. After adjusting for race, gender, age, and education, OALH who were CSA survivors were 21 times more likely to currently use opioids compared to OALH who were not exposed to CSA (adjusted OR: 21.1; 95% CI: 1.78-250.0). The association seen between CSA history and opioid use may be due to unresolved trauma among OALH. Trauma-informed interventions addressing CSA may help to reduce opioid use among OALH.

Childhood sexual abuse and antiretroviral therapy adherence among older adults living with HIV: a mixed methods study.

Findings on the association between childhood sexual abuse (CSA) and antiretroviral therapy (ART) adherence have been varied, with some studies showing a relationship, or a lack thereof. However, to our knowledge, no study has examined this association among older adults living with HIV (OALH). Therefore, the purpose of this study was to examine the association between CSA and ART adherence among OALH using a mixed methods approach. This study, which involved a concurrent design, had two phases. The first phase comprised in-depth, semi-structured interviews of 24 adults aged 50 and older living with HIV in South Carolina. The second phase included data from 91 OALH. Thematic analysis and multivariable regression models, adjusting for age, gender, race, and income, were used to determine the association between CSA and ART adherence. The main theme emerging from the qualitative data was that CSA was not linked with ART adherence. However, contrastingly, quantitative analyses revealed a negative statistically significant association between CSA and ART adherence (adjusted ß: -3.35; 95% CI: -5.37, -1.34). This difference in findings could be due to the hidden impact of trauma and/or the use of different study populations. Future research should assess mediating pathways between CSA and ART adherence.

Health disparities in mortality among individuals with HIV-associated dementia in South Carolina.

HIV disproportionately affects the South compared to other regions of the US. Some people living with HIV (PLWH) may acquire HIV-associated neurocognitive disorders (HAND), of which HIV-associated dementia (HAD) is the most severe form. This study aimed to examine the disparities in mortality among individuals with HAD. Data were obtained from the South Carolina Alzheimer's Disease and Related Dementias Registry from 2010 to 2016 (HAD: n = 505; N = 164,982). Logistic regression and Cox proportional hazards models were used to determine mortality related to HIV-associated dementia and potential sociodemographic differences. Adjusted models controlled for age, gender, race, rurality, and place of diagnosis. Individuals diagnosed in a nursing facility were three times more likely to die with HAD compared to those diagnosed in the community (OR: 3.25; 95% CI: 2.08-5.08). Black populations were more likely to die with HAD compared to White populations (OR: 1.52; 95% CI: 0.953-2.42). Disparities in mortality among patients with HAD were found in place of diagnosis and by race. Future research should determine if mortality among individuals with HAD were as a result of HAD or non-HIV related decline.

Development of stapled NONO-associated peptides reveals unexpected cell permeability and nuclear localisation.

The non-POU domain-containing octamer-binding protein (NONO) is a nucleic acid-binding protein with diverse functions that has been identified as a potential cancer target in cell biology studies. Little is known about structural motifs that mediate binding to NONO apart from its ability to form homodimers, as well as heterodimers and oligomers with related homologues. We report a stapling approach to macrocyclise helical peptides derived from the insulin-like growth factor binding protein (IGFBP-3) that NONO interacts with, and also from the dimerisation domain of NONO itself. Using a range of chemistries including Pd-catalysed cross-coupling, cysteine arylation and cysteine alkylation, we successfully improved the helicity and observed modest peptide binding to the NONO dimer, although binding could not be saturated at micromolar concentrations. Unexpectedly, we observed cell permeability and preferential nuclear localisation of various dye-labelled peptides in live confocal microscopy, indicating the potential for developing peptide-based tools to study NONO in a cellular context.

Synthesis and studies of new purines/pyrimidine derivatives as multi-targeted agents involving various receptor sites in the immune system.

Pro-inflammation, which is developed due to the increased production of cytokines, mainly interleukin-6 (IL-6), during the working of immune system pathways, becomes a major concern these days for many researchers. So, it is desired to design, screen, and synthesize new molecules with multi-parametric features showing their efficacy for Toll-like receptors (TLRs) and inhibiting the disease-causing receptor sites like viral infections, cancers, etc. along with controlling inflammation, fever, and other side effects during such pathways. Further, looking at the literature, curcumin a multi-targeted agent is showing its efficiency toward various receptor sites involved in many diseases as mentioned above. This fascinated us to build up new molecules which behave like curcumin with minimum side effects. In silico studies, involving ADMET studies, toxicological data, and docking analyses, of newly synthesized compounds (3-5) along with tautomers of curcumin i.e., (1-2), and some reported compounds like 9 and 10 have been studied in detail. Great emphasis has been made on analyzing binding energies, protein-ligand structural interactions, stabilization of newly synthesized molecules against various selected receptor sites using such computational tools. Compound 3 is the most efficient multifunctional agent, which has shown its potential toward most of the receptor sites in docking analysis. It has also responded well in Molecular dynamics (MD) simulation toward 5ZLN, 4RJ3, 4YO9, 4YOJ, and 1I1R sites. Finally, studies were extended to understand in vitro anti-inflammatory activity for particularly compound 3 in comparison to diclofenac and curcumin, which signifies the efficiency of compound 3.

Xanthomonas as a Model System for Studying Pathogen Emergence and Evolution.

In this review, we highlight studies in which whole-genome sequencing, comparative genomics, and population genomics have provided unprecedented insights into past and ongoing pathogen evolution. These include new understandings of the adaptive evolution of secretion systems and their effectors. We focus on Xanthomonas pathosystems that have seen intensive study and improved our understanding of pathogen emergence and evolution, particularly in the context of host specialization: citrus canker, bacterial blight of rice, and bacterial spot of tomato and pepper. Across pathosystems, pathogens appear to follow a pattern of bursts of evolution and diversification that impact host adaptation. There remains a need for studies on the mechanisms of host range evolution and genetic exchange among closely related but differentially host-specialized species and to start moving beyond the study of specific strain and host cultivar pairwise interactions to thinking about these pathosystems in a community context.

Knowledge and Skill Retention in First-Year MBBS Students After Basic Life Support Training: A One-Year Longitudinal Study.

BACKGROUND: The Indian National Medical Council has incorporated the Basic Life Support (BLS) course in the foundation course of the undergraduate (MBBS) medical curriculum. However, medical teachers raise concerns about how training would affect the retention of Basic Life Support (BLS) abilities in the longer run. So, the current study assesses the knowledge and retention of BLS skills among first-year MBBS students over one year. METHODS: We included one hundred first-year MBBS students in our study who were trained for BLS, including theory, demonstrations and hands-on training using mannequins. Theoretical knowledge was assessed using pre-test and post-test questionnaires. At the same time, the skills were evaluated using Directly Observed Procedural Skills (DOPS) scores before, just after the training session, and again after one month, six months, and one year. Course feedback was also taken from the students after completing the sessions. RESULTS: There was a statistically significant difference between pre-and post-test knowledge scores, indicating that training improved their knowledge. (p < 0.001) There was also a statistically significant difference between pre-and post-test skills using DOPS (p < 0.001). There was no significant difference in the score when DOPS was conducted at one month, but a significant decrease in their skills was seen at six months and one year when compared with the Post Skill Score. (P < 0.001) CONCLUSIONS: The first-year medical students' knowledge and skills were enhanced by BLS training coupled with practical sessions. Such waning skills necessitate repeating the training at periodic intervals to reinform retention of skills acquired during BLS training.

A Review and Comparative Analysis of Relevant Approaches of Zero Trust Network Model.

The Zero Trust safety architecture emerged as an intriguing approach for overcoming the shortcomings of standard network security solutions. This extensive survey study provides a meticulous explanation of the underlying principles of Zero Trust, as well as an assessment of the many strategies and possibilities for effective implementation. The survey begins by examining the role of authentication and access control within Zero Trust Architectures, and subsequently investigates innovative authentication, as well as access control solutions across different scenarios. It more deeply explores traditional techniques for encryption, micro-segmentation, and security automation, emphasizing their importance in achieving a secure Zero Trust environment. Zero Trust Architecture is explained in brief, along with the Taxonomy of Zero Trust Network Features. This review article provides useful insights into the Zero Trust paradigm, its approaches, problems, and future research objectives for scholars, practitioners, and policymakers. This survey contributes to the growth and implementation of secure network architectures in critical infrastructures by developing a deeper knowledge of Zero Trust.

Molecular Characterization of BK Polyomavirus Replication in Allogeneic Hematopoietic Cell Transplantation Patients.

BACKGROUND: High-level BK polyomavirus (BKPyV) replication in allogeneic hematopoietic cell transplantation (HCT) predicts failing immune control and BKPyV-associated hemorrhagic cystitis. METHODS: To identify molecular markers of BKPyV replication and disease, we scrutinized BKPyV DNA-loads in longitudinal urine and plasma pairs from 20 HCT patients using quantitative nucleic acid testing (QNAT), DNase-I treatment prior to QNAT, next-generation sequencing (NGS), and tested cell-mediated immunity. RESULTS: We found that larger QNAT amplicons led to under-quantification and false-negatives results (P < .001). DNase-I reduced urine and plasma BKPyV-loads by >90% (P < .001), indicating non-encapsidated BKPyV genomes. DNase-resistant urine BKPyV-loads remained infectious in cell culture. BKPyV genome fragmentation of ≤250 bp impaired NGS coverage of genetic variation using 1000-bp and 5000-bp amplicons. Conversely, 250-bp amplicons captured viral minority variants. We identified genotype-specific and genotype-independent changes in capsid Vp1 or T-antigen predicted to escape from antibody neutralization or cytotoxic CD8 T-cells, respectively. Genotype-specific changes in immunodominant 9mers were associated with reduced or absent CD8 T-cell responses. Thus, failure to control BKPyV replication in HCT Patients may involve insufficient genotype-specific cytotoxic CD8 T-cell responses, potentially predictable by low neutralizing antibodies as well as genotype-independent immune escape. CONCLUSIONS: Our results provide new insights for patient evaluation and for designing immune protection through neutralizing antibodies, adoptive T-cell therapy, or vaccines.

STAT5B mutations in myeloid neoplasms differ by disease subtypes but characterize a subset of chronic myeloid neoplasms with eosinophilia and/or basophilia.

STAT5B has been reported as a recurrent mutation in myeloid neoplasms (MNs) with eosinophilia, but the overall frequency and importance across a spectrum of MNs are largely unknown. We conducted a multicenter study on a series of 82 MNs with STAT5B mutations detected by next-generation sequencing. The estimated frequency of STAT5B mutation in MNs was low.

Social Support, Internalized HIV Stigma, Resilience and Depression Among People Living with HIV: A Moderated Mediation Analysis.

Internalized HIV stigma has been associated with depression among people living with HIV (PLWH). However, it is still unclear whether resilience would mediate the association between internalized HIV stigma and depression and how this indirect effect would be moderated by social support. Data were collected from 402 PLWH in South Carolina using a cross-sectional survey. Data were fitted using a path model that specified the extent to which internalized HIV stigma and depression were related through resilience and how this effect was moderated by social support. Sociodemographic characteristics were included in the model as covariates. The indirect effect of internalized HIV stigma on depression through resilience was statistically significant for high social support but not for low social support. To mitigate negative impacts of internalized HIV stigma on mental health of PLWH, intervention efforts should integrate multilevel components for promoting both resilience and social support.

Psychosocial Protective and Risk Factors of Quality of Life Outcomes Among Older Adults Living With HIV.

HIV continues to be a public health issue for older adults. Previous studies have examined predictors of quality of life (QoL) among people living with HIV (PLWH), but the majority have been in international settings and have not focused on older adults living with HIV (OALH). The aim of this study was to examine the associations between psychosocial protective and risk factors (resilience, internalized HIV-related stigma, and depression), and overall and domains (physical, psychological, independence, social, environmental, and spiritual) of QoL among OALH. Data were obtained from 156 OALH living in South Carolina. Resilience was positively associated with all QoL domains except the spiritual domain. Internalized HIV-related stigma was associated with all QoL domains except the psychological and environmental domains. Depression was associated with the overall QoL measure and all domains. Interventions aimed at increasing resilience, attenuating internalized HIV-related stigma and depressive symptoms may be warranted for OALH, which may improve overall and varying domains of QoL.

Coping and ART adherence self-efficacy among people living with HIV in South Carolina.

In the US, more than 50% of new HIV infections are reported in southern states. Besides, the incidence rate of HIV in South Carolina is 17 per 100,000 population. Regardless of improved quality of life with the advent of ART, coping with stressors may influence ART adherence self-efficacy. This study assessed the association between coping strategies and ART adherence self-efficacy among people living with HIV (PLWH) in South Carolina. Cross-sectional data were obtained from 402 PLWH attending a large immunology center in South Carolina in 2018. Unadjusted and adjusted linear regression models were used to determine the association between coping strategies and ART adherence self-efficacy. Alcohol or drug use was negatively associated with ART adherence self-efficacy (b = -0.170, 95% CI [-0.255, -0.085], p = 0.0001). Religiosity was positively associated with ART adherence self-efficacy (b = 0.101, 95% CI [0.017, 0.185], p = 0.019). Overall coping and self-motivation were not significantly associated with ART adherence self-efficacy. Accentuating religiosity and attenuating alcohol or drug use as a means of coping may improve ART adherence self-efficacy among PLWH.