scholarly journals Anti-SARS-CoV-2 antibody levels and kinetics of vaccine response: potential role for unresolved inflammation following recovery from SARS-CoV-2 infection

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
F. Gianfagna ◽  
G. Veronesi ◽  
A. Baj ◽  
D. Dalla Gasperina ◽  
S. Siclari ◽  
...  
Keyword(s):  
Healthcare Workers ◽  
Associated Factors ◽  
Potential Role ◽  
Inflammatory Diseases ◽  
Circulating Biomarkers ◽  
Vaccine Response ◽  
Main Determinant ◽  
Kinetic Pattern ◽  
Antibody Levels ◽  
Kinetics Of

AbstractThe immune response after SARS-CoV-2 vaccine administration appears to be characterized by high inter-individual variation, even in SARS-CoV-2 positive subjects, who could have experienced different post-infection, unresolved conditions. We monitored anti-SARS-CoV-2 IgG levels and kinetics along with circulating biomarkers in a cohort of 175 healthcare workers during early immunization with COVID-19 mRNA-LNP BNT162b2 vaccine, to identify the associated factors. Subjects with a previous SARS-CoV-2 infection were characterized by higher BMI and CRP levels and lower neutrophil count with respect to naïve subjects. Baseline IgG levels resulted associated with CRP independently on BMI and inflammatory diseases. Among 137 subjects undergoing vaccination and monitored after the first and the second dose, three kinetic patterns were identified. The pattern showing a rapid growth was characterized by higher IgG levels at baseline and higher CRP and MCHC levels than negative subjects. Subjects previously exposed to SARS-CoV-2 showed higher levels of CRP, suggesting persistence of unresolved inflammation. These levels are the main determinant of IgG levels at baseline and characterized subjects belonging to the best performing, post-vaccine antibody kinetic pattern.

scholarly journals Significant reduction in humoral immunity among healthcare workers and nursing home residents 6 months after COVID-19 BNT162b2 mRNA vaccination

2021 ◽  
Author(s):  
David H. Canaday ◽  
Oladayo A. Oyebanji ◽  
Debbie Keresztesy ◽  
Michael Payne ◽  
Dennis Wilk ◽  
...  
Keyword(s):  
Nursing Home ◽  
Humoral Immunity ◽  
Healthcare Workers ◽  
Limit Of Detection ◽  
Nursing Home Residents ◽  
Good Health ◽  
Neutralization Assay ◽  
Vaccine Response ◽  
Post Vaccination ◽  
Antibody Levels

AbstractHigh COVID-19 mortality among nursing home (NH) residents led to their prioritization for SARS-CoV-2 vaccination; most NH residents received BNT162b2 mRNA vaccination under the Emergency Use Authorization due to first to market and its availability. With NH residents’ poor initial vaccine response, the rise of NH breakthrough infections and outbreaks, characterization of the durability of immunity to inform public health policy on the need for boosting is needed. We report on humoral immunity from 2 weeks to 6-months post-vaccination in 120 NH residents and 92 ambulatory healthcare worker controls with and without pre-vaccination SARS-CoV-2 infection. Anti-spike and anti-receptor binding domain (RBD) IgG, and serum neutralization titers, were assessed using a bead-based ELISA method and pseudovirus neutralization assay. Anti-spike, anti-RBD and neutralization levels dropped more than 84% over 6 months’ time in all groups irrespective of prior SARS-CoV-2 infection. At 6 months post-vaccine, 70% of the infection-naive NH residents had neutralization titers at or below the lower limit of detection compared to 16% at 2 weeks after full vaccination. These data demonstrate a significant reduction in levels of antibody in all groups. In particular, those infection-naive NH residents had lower initial post-vaccination humoral immunity immediately and exhibited the greatest declines 6 months later. Healthcare workers, given their younger age and relative good-health, achieved higher initial antibody levels and better maintained them, yet also experienced significant declines in humoral immunity. Based on the rapid spread of the delta variant and reports of vaccine breakthrough in NH and among younger community populations, boosting NH residents may be warranted.

scholarly journals Does a lack of vaccine side effects correlate with reduced BNT162b2 mRNA vaccine response among healthcare workers and nursing home residents?

2021 ◽  
Author(s):  
Oladayo A. Oyebanji ◽  
Brigid Wilson ◽  
Debbie Keresztesy ◽  
Lenore Carias ◽  
Dennis Wilk ◽  
...  
Keyword(s):  
Nursing Home ◽  
Side Effects ◽  
Healthcare Workers ◽  
Nursing Home Residents ◽  
Community Dwelling ◽  
Vaccine Response ◽  
Term Care ◽  
Post Vaccination ◽  
Dichotomous Variable ◽  
Antibody Levels

Abstract Background The BNT162b2 SARS-CoV-2 mRNA vaccination has mitigated the burden of COVID-19 among residents of long-term care facilities considerably, despite being excluded from the vaccine trials. Data on reactogenicity (vaccine side effects) in this population are limited. Aims To assess reactogenicity among nursing home (NH) residents. To provide a plausible proxy for predicting vaccine response among this population. Methods We enrolled and sampled NH residents and community-dwelling healthcare workers who received the BNT162b2 mRNA vaccine, to assess local or systemic reactogenicity and antibody levels (immunogenicity). Results NH residents reported reactions at a much lower frequency and lesser severity than the community-dwelling healthcare workers. These reactions were mild and transient with all subjects experiencing more local than systemic reactions. Based on our reactogenicity and immunogenicity data, we developed a linear regression model predicting log-transformed anti-spike, anti-receptor-binding domain (RBD), and neutralizing titers, with a dichotomous variable indicating the presence or absence of reported reactions which revealed a statistically significant effect, with estimated shifts in log-transformed titers ranging from 0.32 to 0.37 (all p < 0.01) indicating greater immunogenicity in subjects with one or more reported reactions of varying severity. Discussion With a significantly lower incidence of post-vaccination reactions among NH residents as reported in this study, the BNT162b2 mRNA vaccine appears to be well-tolerated among this vulnerable population. If validated in larger populations, absence of reactogenicity could help guide clinicians in prioritizing vaccine boosters. Conclusions Reactogenicity is significantly mild among nursing home residents and overall, subjects who reported post-vaccination reactions developed higher antibody titers.

scholarly journals Reduced BNT162b2 mRNA vaccine response in SARS-CoV-2-naive nursing home residents

2021 ◽  
Author(s):  
David H. Canaday ◽  
Lenore Carias ◽  
Oladayo A. Oyebanji ◽  
Debbie Keresztesy ◽  
Dennis Wilk ◽  
...  
Keyword(s):  
Nursing Home ◽  
Healthcare Workers ◽  
Nursing Home Residents ◽  
Antibody Responses ◽  
Control Measures ◽  
Vaccine Response ◽  
Infection Control Measures ◽  
Data Gap ◽  
Antibody Levels ◽  
Care Worker

AbstractThe SARS-CoV-2 pandemic impact on nursing home (NH) residents prompted their prioritization for early vaccination. To fill the data gap for vaccine immunogenicity in NH residents, we examined antibody levels after BNT162b2 mRNA vaccine to spike, receptor binding domain (RBD) and for virus neutralization in 149 NH residents and 111 health care worker controls. SARS-CoV-2-naive NH residents mount antibody responses with nearly 4-fold lower median neutralization titers and half the anti-spike level compared to SARS-CoV-2-naive healthcare workers. By contrast, SARS-CoV-2-recovered vaccinated NH residents had neutralization, anti-spike and anti-RBD titers similar to SARS-CoV-2-recovered vaccinated healthcare workers. NH residents’ blunted antibody responses have important implications regarding the quality and durability of protection afforded by neoantigen vaccines. We urgently need better longitudinal evidence on vaccine effectiveness specific to NH resident populations to inform best practices for NH infection control measures, outbreak prevention and potential indication for a vaccine boost.

scholarly journals The Kinetics of COVID-19 Vaccine Response in a Community Vaccinated Population

2021 ◽  
Author(s):  
Michael Tu ◽  
Samantha Chiang ◽  
Richard Bender ◽  
David T.W. Wong ◽  
Charles Strom
Keyword(s):  
Antibody Response ◽  
Cost Effective ◽  
Igg Antibodies ◽  
Vaccine Response ◽  
Community Based ◽  
Post Vaccination ◽  
Non Invasive ◽  
Serial Samples ◽  
Antibody Levels ◽  
Kinetics Of

AbstractWe used a noninvasive electrochemical quantitative assay for IgG antibodies to SARS-CoV-2 S1 in saliva to investigate the kinetics of antibody response in a community-based population who had received either the Pfizer or Moderna mRNA-based vaccines. Samples were received from a total of 97 individuals including a subset of 42 individuals who collected samples twice-weekly for 3 months or longer. In all, 840 samples were collected and analyzed. In all individuals, salivary antibody levels rose sharply in the 2-week period following their second vaccination, with peak antibody levels being at 10-20 days post-vaccination. We observed that 20%, 10% and 2.4% of individuals providing serial samples had a 90%, 95%, and 99% drop respectively from peak levels during the duration of monitoring and two patients fell to pre-vaccination levels (5%). The use of non-invasive quantitative salivary antibody measurement can allow widespread, cost-effective monitoring of vaccine response.Article Summary LineCOVID-19 antibodies were measured in saliva and 20% of vaccinated subjects experienced a 90% drop in peak antibody levels over the course of monitoring.

Kinetic of oxidation of methyl orange by vanadium(V) under conditions VO2+ and decavanadates coexist: Catalysis by Triton X-100 micellar medium

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Methyl Orange ◽  
Solution Ph ◽  
Vanadium Concentration ◽  
Limiting Behavior ◽  
First Order ◽  
First Order Kinetics ◽  
Ph Range ◽  
Kinetic Pattern ◽  
Triton X ◽  
Kinetics Of

The kinetics of oxidation of methyl orange by vanadium(V) {V(V)} has been investigated in the pH range 2.3-3.79. In this pH range V(V) exists both in the form of decavanadates and VO2+. The kinetic results are distinctly different from the results obtained for the same reaction in highly acidic solution (pH &lt; 1) where V(V) exists only in the form of VO2+. The reaction obeys first order kinetics with respect to methyl orange but the rate has very little dependence on total vanadium concentration. The reaction is accelerated by H+ ion but the dependence of rate on [H+] is less than that corresponding to first order dependence. The equilibrium between decavanadates and VO2+ explains the different kinetic pattern observed in this pH range. The reaction is markedly accelerated by Triton X-100 micelles. The rate-[surfactant] profile shows a limiting behavior indicative of a unimolecular pathway in the micellar pseudophase.

scholarly journals A family harboring an MLKL loss of function variant implicates impaired necroptosis in diabetes

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
Joanne M. Hildebrand ◽  
Bernice Lo ◽  
Sara Tomei ◽  
Valentina Mattei ◽  
Samuel N. Young ◽  
...  
Keyword(s):  
Potential Role ◽  
Autosomal Dominant ◽  
Inflammatory Diseases ◽  
Diabetic Patients ◽  
Incomplete Penetrance ◽  
Loss Of Function ◽  
Healthy Sibling ◽  
Dominant Disease ◽  
Terminal Effector

AbstractMaturity-onset diabetes of the young, MODY, is an autosomal dominant disease with incomplete penetrance. In a family with multiple generations of diabetes and several early onset diabetic siblings, we found the previously reported P33T PDX1 damaging mutation. Interestingly, this substitution was also present in a healthy sibling. In contrast, a second very rare heterozygous damaging mutation in the necroptosis terminal effector, MLKL, was found exclusively in the diabetic family members. Aberrant cell death by necroptosis is a cause of inflammatory diseases and has been widely implicated in human pathologies, but has not yet been attributed functions in diabetes. Here, we report that the MLKL substitution observed in diabetic patients, G316D, results in diminished phosphorylation by its upstream activator, the RIPK3 kinase, and no capacity to reconstitute necroptosis in two distinct MLKL−/− human cell lines. This MLKL mutation may act as a modifier to the P33T PDX1 mutation, and points to a potential role of impairment of necroptosis in diabetes. Our findings highlight the importance of family studies in unraveling MODY’s incomplete penetrance, and provide further support for the involvement of dysregulated necroptosis in human disease.

scholarly journals Rapid decline of neutralizing antibodies against SARS-CoV-2 among infected healthcare workers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Stéphane Marot ◽  
◽  
Isabelle Malet ◽  
Valentin Leducq ◽  
Karen Zafilaza ◽  
...  
Keyword(s):  
Neutralizing Antibodies ◽  
Healthcare Workers ◽  
Disease Onset ◽  
Control Measures ◽  
Infection Prevention And Control ◽  
Rapid Decline ◽  
Prevention And Control Measures ◽  
Few Data ◽  
Antibody Levels ◽  
And Control

AbstractThere are only few data concerning persistence of neutralizing antibodies (NAbs) among SARS-CoV-2-infected healthcare workers (HCW). These individuals are particularly exposed to SARS-CoV-2 infection and at potential risk of reinfection. We followed 26 HCW with mild COVID-19 three weeks (D21), two months (M2) and three months (M3) after the onset of symptoms. All the HCW had anti-receptor binding domain (RBD) IgA at D21, decreasing to 38.5% at M3 (p < 0.0001). Concomitantly a significant decrease in NAb titers was observed between D21 and M2 (p = 0.03) and between D21 and M3 (p < 0.0001). Here, we report that SARS-CoV-2 can elicit a NAb response correlated with anti-RBD antibody levels. However, this neutralizing activity declines, and may even be lost, in association with a decrease in systemic IgA antibody levels, from two months after disease onset. This short-lasting humoral protection supports strong recommendations to maintain infection prevention and control measures in HCW, and suggests that periodic boosts of SARS-CoV-2 vaccination may be required.

scholarly journals Compliance with Standard Precautions and Associated Factors among Healthcare Workers in Gondar University Comprehensive Specialized Hospital, Northwest Ethiopia

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Tariku Gebre Haile ◽  
Eshetu Haileselassie Engeda ◽  
Abdella Amano Abdo
Keyword(s):  
Healthcare Workers ◽  
Associated Factors ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Cross Sectional Study ◽  
Northwest Ethiopia ◽  
Management Support ◽  
Standard Precautions ◽  
Cross Sectional ◽  
Specialized Hospital

Background. In many studies, compliance with standard precautions among healthcare workers was reported to be inadequate.Objective.The aim of this study was to assess compliance with standard precautions and associated factors among healthcare workers in northwest Ethiopia.Methods.An institution-based cross-sectional study was conducted from March 01 to April 30, 2014. Simple random sampling technique was used to select participants. Data were entered into Epi info 3.5.1 and were exported to SPSS version 20.0 for statistical analysis. Multivariate logistic regression analyses were computed and adjusted odds ratio with 95% confidence interval was calculated to identify associated factors.Results.The proportion of healthcare workers who always comply with standard precautions was found to be 12%. Being a female healthcare worker (AOR [95% CI] 2.18 [1.12–4.23]), higher infection risk perception (AOR [95% CI] 3.46 [1.67–7.18]), training on standard precautions (AOR [95% CI] 2.90 [1.20–7.02]), accessibility of personal protective equipment (AOR [95% CI] 2.87 [1.41–5.86]), and management support (AOR [95% CI] 2.23 [1.11–4.53]) were found to be statistically significant.Conclusion and Recommendation.Compliance with standard precautions among the healthcare workers is very low. Interventions which include training of healthcare workers on standard precautions and consistent management support are recommended.

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