scholarly journals Serum IgG Antibodies against Periodontal Microbes and Cancer Mortality

2019 ◽  
Vol 5 (2) ◽  
pp. 166-175
Author(s):  
Z. Zhong ◽  
Q. Jin ◽  
J. Zhang ◽  
Y.M. Park ◽  
D. Shrestha ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Cancer Mortality ◽  
Igg Antibodies ◽  
Igg Antibody ◽  
Actinomyces Naeslundii ◽  
Hazard Ratios ◽  
Chronic Inflammatory Condition ◽  
Yellow Orange ◽  
Z Scores ◽  
Antibody Titers

Introduction: Periodontitis is a chronic inflammatory condition initiated by microorganisms and is positively linked to systemic conditions such as cancer, cardiovascular disease, and diabetes mellitus. Objectives: To prospectively investigate associations between empirically derived clusters of IgG antibodies against 19 selected periodontal microorganisms and cancer mortality in a representative sample of the US population. Methods: We evaluated 6,491 participants aged ≥40 y from the Third National Health and Nutrition Examination Survey (1988 to 1994), who had complete data on IgG antibody titers against 19 selected periodontal microorganisms and were free of cardiovascular disease and cancer. In a prior study, antibodies were categorized into 4 mutually exclusive groups via cluster analysis: red-green, orange-red, yellow-orange, and orange-blue. Cluster scores were estimated by summing z scores of the antibody titers making up each cluster. Participants were followed up to death until December 31, 2011. Cox proportional hazard models were applied to estimate hazard ratios (HRs) and 95% CIs for all-cancer mortality by tertiles of cluster scores. Results: During follow-up for a median of 15.9 y, there were 2,702 deaths (31.3%), including 631 cancer-related deaths (8.1%). After adjusting for multiple confounders, the orange-blue cluster was inversely associated with cancer mortality (tertile 2 vs. tertile 1: HR = 0.67, 95% CI = 0.54 to 0.84; tertile 3 vs tertile 1: HR = 0.62, 95% CI = 0.46 to 0.84). The association between the yellow-orange cluster and all-cancer mortality was also inverse but not significant, and the orange-red cluster and the red-green cluster were not associated with all-cancer mortality. Conclusions: Antibodies against Eubacterium nodatum and Actinomyces naeslundii may be novel predictors of cancer mortality. If further studies establish a causal relationship between these antibodies and cancer mortality, they could be targets to prevent possible systemic effects of periodontal disease with potential interventions to raise their levels. Knowledge Transfer Statement: Periodontal antibodies against Eubacterium nodatum and Actinomyces naeslundii were inversely associated with cancer mortality among adults followed up for an average of 16 y. Periodontal antibodies may predict cancer mortality.

scholarly journals Periodontal Antibodies and All-Cause and Cardiovascular Disease Mortality

2019 ◽  
Vol 99 (1) ◽  
pp. 51-59 ◽  
Author(s):  
J. Qi ◽  
Z. Zihang ◽  
J. Zhang ◽  
Y.M. Park ◽  
D. Shrestha ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Igg Antibody ◽  
Actinomyces Naeslundii ◽  
Health And Nutrition ◽  
Cox Proportional Hazard ◽  
Disease Mortality ◽  
All Cause Mortality ◽  
Yellow Orange ◽  
Cox Proportional Hazard Models ◽  
Cvd Mortality

Periodontitis is positively linked to cardiovascular disease (CVD), diabetes, cancer, and increased mortality. Empirically derived clusters of IgG antibodies against 19 selected periodontal microorganisms have been associated with hyperglycemia. We further investigated associations between these serum IgG antibody clusters and all-cause and CVD mortality in a representative US population. Participants free of CVD and cancer and aged ≥40 y at baseline ( N = 6,491) from the Third National Health and Nutrition Examination Survey (1988 to 1994) were followed up until December 31, 2011. Antibodies were categorized into 4 clusters: red-green, orange-red, yellow-orange, and orange-blue. Over a 23-y follow-up, 2,702 deaths occurred, including 810 CVD-related deaths. In fully adjusted Cox proportional hazard models, the red-green cluster was positively associated with all-cause mortality (tertile 3 vs. tertile 1: hazard ratio [HR] = 1.43, 95% CI = 1.08 to 1.90, P = 0.015). The yellow-orange cluster was inversely associated with all-cause mortality (tertile 3 vs. tertile 1: HR = 0.78, 95% CI = 0.63 to 0.97, P = 0.028) and CVD mortality (tertile 2 vs. tertile 1: HR = 0.57, 95% CI = 0.42 to 0.77, P = 0.005). The orange-blue cluster (composed of antibodies against Eubacterium nodatum and Actinomyces naeslundii) was inversely associated with all-cause mortality (tertile 3 vs. tertile 1: HR = 0.65, 95% CI = 0.55 to 0.78, P < 0.0001) and CVD mortality (tertile 3 vs. tertile 1: HR = 0.65, 95% CI = 0.47 to 0.88, P = 0.007). These antibodies could predict prognosis or be potential intervention targets to prevent systemic effects of periodontal disease if further studies establish a causal relationship.

scholarly journals Systemic and Mucosal Immunizations with Fibronectin-Binding Protein FBP54 Induce Protective Immune Responses against Streptococcus pyogenes Challenge in Mice

2001 ◽  
Vol 69 (2) ◽  
pp. 924-930 ◽  
Author(s):  
Shigetada Kawabata ◽  
Eiji Kunitomo ◽  
Yutaka Terao ◽  
Ichiro Nakagawa ◽  
Ken Kikuchi ◽  
...  
Keyword(s):  
Streptococcus Pyogenes ◽  
Binding Protein ◽  
Enzyme Linked Immunosorbent Assay ◽  
Igg Antibodies ◽  
Igg Antibody ◽  
Antibody Titers ◽  
Fibronectin Binding Protein ◽  
Specific Igg ◽  
Fibronectin Binding ◽  
Specific Igg Antibodies

ABSTRACT The purpose of this study was to examine the suitability of fibronectin-binding protein FBP54 as a putative vaccine forStreptococcus pyogenes infections. When the distribution of the fbp54 gene among the clinical isolates representing various M serotypes was tested by PCR and Southern blot assays, it was found that all of the strains possess this gene. Furthermore, a significant increase in immunoglobulin G (IgG) antibody titers against FBP54 was observed in sera from patients with S. pyogenesinfections compared with those from healthy volunteers (P < 0.005). Mice were immunized with FBP54 subcutaneously, orally, or nasally. An enzyme-linked immunosorbent assay revealed that antigen-specific IgG antibodies were induced in the sera of immunized mice, while high salivary levels of IgA antibodies were detected after oral and nasal immunizations. Mice subcutaneously or orally immunized with FBP54 survived significantly longer following the challenge with S. pyogenes than did nonimmunized mice (P < 0.001). These results indicate that FBP54 is a promising vaccine for the prevention of S. pyogenesinfections.

scholarly journals Large-Scale Study of Antibody Titer Decay following BNT162b2 mRNA Vaccine or SARS-CoV-2 Infection

Vaccines ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 64
Author(s):  
Ariel Israel ◽  
Yotam Shenhar ◽  
Ilan Green ◽  
Eugene Merzon ◽  
Avivit Golan-Cohen ◽  
...  
Keyword(s):  
Large Scale ◽  
Immune Protection ◽  
Igg Antibodies ◽  
Igg Antibody ◽  
Exponential Decrease ◽  
Previous Infection ◽  
History Of ◽  
Antibody Titers ◽  
Antibody Levels ◽  
Kinetics Of

Immune protection following either vaccination or infection with SARS-CoV-2 is thought to decrease over time. We designed a retrospective study, conducted at Leumit Health Services in Israel, to determine the kinetics of SARS-CoV-2 IgG antibodies following administration of two doses of BNT162b2 vaccine, or SARS-CoV-2 infection in unvaccinated individuals. Antibody titers were measured between 31 January 2021, and 31 July 2021 in two mutually exclusive groups: (i) vaccinated individuals who received two doses of BNT162b2 vaccine and had no history of previous infection with COVID-19 and (ii) SARS-CoV-2 convalescents who had not received the vaccine. A total of 2653 individuals fully vaccinated by two doses of vaccine during the study period and 4361 convalescent patients were included. Higher SARS-CoV-2 IgG antibody titers were observed in vaccinated individuals (median 1581 AU/mL IQR [533.8–5644.6]) after the second vaccination than in convalescent individuals (median 355.3 AU/mL IQR [141.2–998.7]; p < 0.001). In vaccinated subjects, antibody titers decreased by up to 38% each subsequent month while in convalescents they decreased by less than 5% per month. Six months after BNT162b2 vaccination 16.1% subjects had antibody levels below the seropositivity threshold of <50 AU/mL, while only 10.8% of convalescent patients were below <50 AU/mL threshold after 9 months from SARS-CoV-2 infection. This study demonstrates individuals who received the Pfizer-BioNTech mRNA vaccine have different kinetics of antibody levels compared to patients who had been infected with the SARS-CoV-2 virus, with higher initial levels but a much faster exponential decrease in the first group.

scholarly journals Evaluation of Anti-SARS-CoV-2 IgG Antibody in Healthcare Professionals Infected with COVID-19

2021 ◽  
Vol 14 (11) ◽  
Author(s):  
Borhan Moradveisi ◽  
Shirin Behzadi ◽  
Farima Zakaryaei ◽  
Ali Jalili ◽  
Khaled Rahmani ◽  
...  
Keyword(s):  
Healthcare Professionals ◽  
Total Population ◽  
Igg Antibodies ◽  
Rt Pcr ◽  
Igg Antibody ◽  
Disease Symptoms ◽  
Positive Antibody ◽  
Antibody Titers ◽  
Polymerase Chain ◽  
And Gender

Background: The knowledge of antibody’s significance and frequency in patients cured of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is extremely limited. Objectives: This study aimed to evaluate anti-SARS-CoV-2 IgG antibodies in patients exposed to SARS-CoV-2. Methods: Healthcare professionals infected with SARS-CoV-2 were enrolled in this study. The levels of anti-SARS-CoV-2 IgG antibodies were detected 15 days after the onset of symptoms and five months later. Results: A total of 167 patients with coronavirus disease 2019 (COVID-19) were evaluated, including 119 (71.3%) females and 48 (28.7%) males. Of the 88 polymerase chain reaction (PCR)-positive patients, 55 (62.5%) had IgG-positive antibodies, and of the 79 reverse transcriptase (RT)-PCR-negative patients, 12 (16.9%) had IgG-positive antibodies. Out of 23 anosmia cases, 19 (82.6%) had positive antibodies. There was a significant relationship between anosmia and positive antibody (P  =  0.001), but there was no correlation between antibody titers and gender and other disease symptoms. Immortally, 63 (94%) cases demonstrated high levels of anti-SARS-CoV-2 IgG antibodies after five months of infection. Moreover, 6.5% (N  =  11) of the total population were re-infected with COVID-19 six months later. Conclusions: Overall, anti-SARS-CoV-2 IgG antibodies detection may be an appropriate method to identify suspected patients with a negative RT-PCR test. Antibodies can remain high in most infected patients for up to five months after infection. Moreover, anosmia seems to be a valuable diagnostic factor, and the healthcare system should implement isolation measures for patients with anosmia.

scholarly journals STATE OF LIPID SYNTHESIS FUNCTION OF LIVER AT MODERATE CEREBRAL ISCHEMIA IN NEWBORNS FROM MOTHERS WITH CYTOMEGALOVIRUS INFECTION

2017 ◽  
Vol 1 (65) ◽  
pp. 65-70
Author(s):  
Игорь Гориков ◽  
Igor Gorikov ◽  
Михаил Луценко ◽  
Mikhail Lutsenko ◽  
Наталия Ишутина ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Total Cholesterol ◽  
Cytomegalovirus Infection ◽  
Low Density Lipoproteins ◽  
Low Density ◽  
Igg Antibodies ◽  
Avidity Index ◽  
Igg Antibody ◽  
Igm Antibodies ◽  
Antibody Titers

The contents of total cholesterol, high-density lipoproteins, low-density lipoproteins, and triglycerides in cord blood were studied at moderate cerebral ischemia in 230 mature newborns from mothers with chronic cytomegalovirus infection (CMVI) in the second trimester of gestation (main group). The first group (control group) consisted of 30 newborns from mothers with physiological pregnancy. Depending on the activity of chronic CMVI, 4 groups were distinguished, in each of which there were 2 subgroups. Subgroup A included newborns from mothers with pregnancy and an uncomplicated threat of miscarriage, and in subgroup B there were the patients whose mothers suffered the threat of miscarriage at 16-21st week of gestation. The second group was represented by 50 newborns whose mothers had a latent course of chronic CMVI. The third group included 50 children from mothers with reactivation of chronic CMVI (titers of IgM antibodies to CMV were 1:200-1:400, IgG antibody titers to CMVI were 1:200-1:400, avidity index of IgG antibodies to CMVI was more than 65%). The fourth group included 50 newborns whose mothers suffered an acute phase of chronic CMVI (titers of IgM antibodies to CMV were 1:200-1:400, IgG antibody titers to CMV were 1:200-1: 800, avidity index of IgG antibodies to CMV was more than 65%), and in the fifth group there were 50 patients with antenatal history with reactivation of chronic CMVI (IgM antibody titers to CMV were 1:200-1:400, IgG antibody titers to CMV were 1:400-1:1600, avidity index of IgG antibodies to CMV was more than 65%). When comparing 2A and 2B subgroups with the first group, there were no significant changes in total cholesterol of high and low density lipoproteins and triglycerides. In children in 3A subgroup, the concentration of low density lipoproteins decreased to 0.34±0.02 mmol/L, and in 3B subgroup to 0.32±0.02 mmol/L with simultaneous increase in the triglyceride level to 0.51±0.03 mmol/L (in the first group, it was 0.53±0.03 mmol/L, p<0.001 and 0.43±0.03 mmol/L, p<0.05, respectively). In comparison with the first group in 5B subgroup, the lowest total cholesterol values (1.82±0.05 mmol/L, p<0,05), low-density lipoproteins (0.21±0.05 mmol/L, p<0.001), as well as high triglycerides (0.59±0.03, p<0.001) were registered. These can weaken the compensatory-adaptive reactions of the hormonal system that regulates the immune response, vascular permeability and the blood-brain barrier, as well as disrupt the blood supply to the brain in newborns with moderate cerebral ischemia.

scholarly journals A single dose ChAdOx1 nCoV-19 vaccine elicits high antibody responses in individuals with prior SARS-CoV-2 infection comparable to that of double dose vaccinated SARS-CoV-2 infection naïve individuals

2022 ◽  
Author(s):  
Tesfaye Gelanew ◽  
Andargachew Mulu ◽  
Markos Abebe ◽  
Timothy A Bates ◽  
Liya Wassie ◽  
...  
Keyword(s):  
Single Dose ◽  
Antibody Responses ◽  
Double Dose ◽  
Igg Antibodies ◽  
Igg Antibody ◽  
Dose Administration ◽  
Post Vaccination ◽  
Resource Limited ◽  
Antibody Titers ◽  
High Level

Abstract Background A single dose COVID-19 vaccines, mostly mRNA-based vaccines, are shown to induce robust antibody responses in individuals who were previously infected with SARS-CoV-2, suggesting the sufficiency of a single dose to those individuals. However, these important data are limited to developed nations and lacking in resource-limited countries, like Ethiopia. Methods We compared receptor-binding domain (RBD)-specific IgG antibodies in 40 SARS-CoV-2 naïve participants and 25 participants previously infected with SARS-CoV-2, who received two doses of ChAdOx1 nCoV-19 vaccine. We measured the antibody response in post-vaccination blood samples from both groups of participants collected at four different post-vaccination time points: 8- and 12-weeks after each dose of the vaccine administration using an in-house developed ELISA. Results We observed a high level of anti-RBD IgG antibodies titers 8-weeks after a single dose administration (16/27; 59.3%) among naïve participants, albeit dropped significantly (p<0.05) two months later, suggesting the protective immunity elicited by the first dose ChAdOx1 nCoV-19 vaccine will likely last for a minimum of three months. However, as expected, a significant (p<0.001) increase in the level of anti-RBD IgG antibodies titers was observed after the second dose administration in all naïve participants. By contrast, the ChAdOx1 nCoV-19 vaccine-induced anti-RBD IgG antibody titers produced by the P.I participants at 8- to 12-weeks post-single dose vaccination were found to be similar to the antibody titers seen after a two-dose vaccination course among infection- naïve participants and showed no significant (p>0.05) increment following the second dose administration. Conclusion Taken together, our findings show that a single ChAdOx1 nCoV-19 dose in previously SARS-CoV-2 infected individuals elicits similar antibody responses to that of double dose vaccinated naïve individuals. Age and sex were not associated with the level of vaccine-elicited immune responses in both individuals with and without prior SARS-CoV-2 infection. Further studies are required to assess the need for a booster dose to extend the duration and amplitude of the specific protective immune response in Ethiopia settings, especially following the Omicron pandemic.

scholarly journals Large-scale study of antibody titer decay following BNT162b2 mRNA vaccine or SARS-CoV-2 infection

2021 ◽  
Author(s):  
Ariel Israel ◽  
Yotam Shenhar ◽  
Ilan Green ◽  
Eugene Merzon ◽  
Avivit Golan-Cohen ◽  
...  
Keyword(s):  
Large Scale ◽  
Immune Protection ◽  
Igg Antibodies ◽  
Igg Antibody ◽  
Exponential Decrease ◽  
Previous Infection ◽  
History Of ◽  
Antibody Titers ◽  
Antibody Levels ◽  
Kinetics Of

Background: Immune protection following either vaccination or infection with SARS-CoV-2 decreases over time. Objective: To determine the kinetics of SARS-CoV-2 IgG antibodies following administration of two doses of BNT162b2 vaccine, or SARS-CoV-2 infection in unvaccinated individuals. Methods: Antibody titers were measured between January 31, 2021, and July 31, 2021 in two mutually exclusive groups: i) vaccinated individuals who received two doses of BNT162b2 vaccine and had no history of previous infection with COVID-19 and ii) SARS-CoV-2 convalescents who had not received the vaccine. Results: A total of 2,653 individuals fully vaccinated by two doses of vaccine during the study period and 4,361 convalescent patients were included. Higher SARS-CoV-2 IgG antibody titers were observed in vaccinated individuals (median 1581 AU/mL IQR [533.8-5644.6]) after the second vaccination, than in convalescent individuals (median 355.3 AU/mL IQR [141.2-998.7]; p<0.001). In vaccinated subjects, antibody titers decreased by up to 40% each subsequent month while in convalescents they decreased by less than 5% per month. Six months after BNT162b2 vaccination 16.1% subjects had antibody levels below the seropositivity threshold of <50 AU/mL, while only 10.8% of convalescent patients were below <50 AU/mL threshold after 9 months from SARS-CoV-2 infection. Conclusions: This study demonstrates individuals who received the Pfizer-BioNTech mRNA vaccine have different kinetics of antibody levels compared to patients who had been infected with the SARS-CoV-2 virus, with higher initial levels but a much faster exponential decrease in the first group.

scholarly journals Orthogonal immunoassays for IgG antibodies to SARS-CoV-2 antigens reveal that immune response lasts beyond 4 mo post illness onset

2021 ◽  
Vol 118 (5) ◽  
pp. e2021615118
Author(s):  
Varun Sasisekharan ◽  
Niharika Pentakota ◽  
Akila Jayaraman ◽  
Kannan Tharakaraman ◽  
Gerald N. Wogan ◽  
...  
Keyword(s):  
Immune Response ◽  
Acute Infection ◽  
Community Setting ◽  
Neutralizing Antibody ◽  
Igg Antibodies ◽  
Igg Antibody ◽  
Illness Onset ◽  
Antibody Titers ◽  
Active Research ◽  
Antibody Levels

Immune response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection during the current pandemic remains a field of immense interest and active research worldwide. Although the severity of acute infection may depend on the intensity of innate and adaptive immunity, leading to higher morbidity and mortality, the longevity of IgG antibodies, including neutralizing activity to SARS-CoV-2, is viewed as a key correlate of immune protection. Amid reports and concern that there is a rapid decay of IgG antibody levels within 1 mo to 2 mo after acute infection, we set out to study the pattern and duration of IgG antibody response to various SARS-CoV-2 antigens in asymptomatic and symptomatic patients in a community setting. Herein, we show the correlation of IgG anti-spike protein S1 subunit, receptor binding domain, nucleocapsid, and virus neutralizing antibody titers with each other and with clinical features such as length and severity of COVID-19 illness. More importantly, using orthogonal measurements, we found the IgG titers to persist for more than 4 mo post symptom onset, implying that long-lasting immunity to COVID-19 from infection or vaccination might be observed, as seen with other coronaviruses such as SARS and Middle East respiratory syndrome.

The Inducing Roles of the New Isolated Bursal Hexapeptide and Pentapeptide on the Immune Response of AIV Vaccine in Mice

2019 ◽  
Vol 26 (7) ◽  
pp. 542-549 ◽  
Author(s):  
Shan Shan Hao ◽  
Man Man Zong ◽  
Ze Zhang ◽  
Jia Xi Cai ◽  
Yang Zheng ◽  
...  
Keyword(s):  
Immune Response ◽  
Dendritic Cells ◽  
Amino Acid ◽  
T Cell ◽  
Antigen Presentation ◽  
Amino Acid Sequences ◽  
Cell Subpopulation ◽  
Igg Antibody ◽  
Antibody Titers ◽  
Specific Igg

Background: Bursa of Fabricius is the acknowledged central humoral immune organ. The bursal-derived peptides play the important roles on the immature B cell development and antibody production. Objective: Here we explored the functions of the new isolated bursal hexapeptide and pentapeptide on the humoral, cellular immune response and antigen presentation to Avian Influenza Virus (AIV) vaccine in mice immunization. Methods: The bursa extract samples were purified following RP HPLC method, and were analyzed with MS/MS to identify the amino acid sequences. Mice were twice subcutaneously injected with AIV inactivated vaccine plus with two new isolated bursal peptides at three dosages, respectively. On two weeks after the second immunization, sera samples were collected from the immunized mice to measure AIV-specific IgG antibody levels and HI antibody titers. Also, on 7th day after the second immunization, lymphocytes were isolated from the immunized mice to detect T cell subtype and lymphocyte viabilities, and the expressions of co-stimulatory molecule on dendritic cells in the immunized mice. Results: Two new bursal hexapeptide and pentapeptide with amino acid sequences KGNRVY and MPPTH were isolated, respectively. Our investigation proved the strong regulatory roles of bursal hexapeptide on AIV-specific IgG levels and HI antibody titers, and lymphocyte viabilities, and the significant increased T cells subpopulation and expressions of MHCII molecule on dendritic cells in the immunized mice. Moreover, our findings verified the significantly enhanced AIV-specific IgG antibody and HI titers, and the strong increased T cell subpopulation and expressions of CD40 molecule on dendritic cells in the mice immunized with AIV vaccine and bursal pentapeptide. Conclusion: We isolated and identified two new hexapeptide and pentapeptide from bursa, and proved that these two bursal peptides effectively induced the AIV-specific antibody, T cell and antigen presentation immune responses, which provided an experimental basis for the further clinical application of the bursal derived active peptide on the vaccine improvement.

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