Relationship of anti-SARS-CoV-2 IgG antibodies with Vitamin D and inflammatory markers in COVID-19 patients

Latifi-Pupovci et al., Scientific Reports, doi:10.1038/s41598-022-09785-7, Apr 2022

Vitamin D for COVID-19

8th treatment shown to reduce risk in October 2020, now with p < 0.0000000001 from 138 studies, recognized in 18 countries.

No treatment is 100% effective.
Protocols combine treatments.

Prospective study of 69 COVID+ patients in Kosovo, showing lower vitamin D levels associated with COVID-19 severity.
Latifi-Pupovci et al., 5 Apr 2022, prospective, Kosovo, peer-reviewed, 9 authors.
Relationship of anti-SARS-CoV-2 IgG antibodies with Vitamin D and inflammatory markers in COVID-19 patients
Hatixhe Latifi-Pupovci, Sadie Namani, Artina Pajaziti, Blerina Ahmetaj-Shala, Lindita Ajazaj, Afrim Kotori, Valdete Haxhibeqiri, Valentin Gegaj, Gramoz Bunjaku
Scientific Reports, doi:10.1038/s41598-022-09785-7
Several studies have found an association of COVID-19 disease severity with Vitamin D deficiency and higher levels of anti-SARS-CoV-2 IgGs. The aim of this study was to determine whether levels of Vitamin D and "inflammatory state" influence the magnitude of anti-SARS-CoV-2 IgGs levels in COVID-19 patients. For this purpose, in 67 patients levels of anti-SARS-CoV-2 IgG were measured in week 4 whereas in 52 patients levels of Vitamin D were measured in week 1 after symptom onset. We found that low Vitamin D levels were significantly associated with age and disease severity whereas there was a trend without significance, towards negative correlation of Vitamin D with anti-SARS-CoV-2 IgG. Anti-SARS-CoV-2 IgG were significantly higher in older ages, patients with severe disease, diabetes and those who received corticosteroid and antibiotic therapy. There was a positive correlation of anti-SARS-CoV-2 IgG with IL-6, CRP, LDH, ESR and with percentages of granulocytes. In conclusion, Vitamin D and anti-SARS-CoV-2 IgG share common parameters associated with inflammatory state. However, even though Vitamin D protects against severe forms of COVID-19 it could not directly affect anti-SARS-CoV-2 IgG production. The coronavirus disease 2019 (COVID-19 ) is caused by a new coronavirus which in addition to acute respiratory failure is associated with systemic disorders such as hyperinflammation, hypercoagulation and vasculitis 1 . Although many people exhibit mild 'flu-like' symptoms, in severe responses systemic changes have been attributed to the cytokine storm accompanying severe inflammatory syndrome [2] [3] [4] . Severe forms of COVID-19 have been linked with low levels of circulating 25-hydroxy Vitamin D (25[OH]D) as an expression of Vitamin D (Vit. D) [5] [6] [7] [8] [9] [10] . Vit. D has immunomodulatory activity in response to invasion of bacterial and viral pathogens 11, 12 interacting with its receptor (VDR) in immune cells [13] [14] [15] . In several studies it was shown that severe inflammatory syndrome was accompanied with changes in hematological markers and increased several inflammatory markers such as CRP, LDH, ESR, ferritin etc. 2, [16] [17] [18] . A recent study has shown that in the presence of Vit. D, IL-6 induces higher production of IL-10, a known anti-inflammatory cytokine which is expected to lead to the reduction of inflammatory markers such as CRP 19 . Several studies have shown inverse association between Vit. D and CRP levels [20] [21] [22] . Additionally, high levels of CRP were associated with lowering levels of Vit. D 23 indicating that Vit. D is a negative acute phase reactant. Thus, Vit. D insufficiency could be the cause and effect of high CRP levels in COVID-19 patients. Humoral and cellular immune responses, two wings of adaptive immunity, are crucial in clearing a variety of viral infections 24 , and have been implicated in recovered COVID-19 patients 25, 26 . In several studies disease severity..
Ethics declaration. This study was approved by the Ethics Committee at University Clinical Centre of Kosova (reference no 2548/2020). Written informed consent was obtained from all participants, in accordance with the Declaration of Helsinki. Author contributions Competing interests The authors declare no competing interests.
References
Ahmed, A network-based analysis reveals the mechanism underlying vitamin D in suppressing cytokine storm and virus in SARS-CoV-2 infection, Front. Immunol, doi:10.3389/fimmu.2020.590459
Akter, Disease characteristics and serological responses in patients with differing severity of COVID-19 infection: A longitudinal cohort study in Dhaka, Bangladesh, PLoS Negl. Trop. Dis, doi:10.1371/journal.pntd.0010102
Ali, Elevated level of C-reactive protein may be an early marker to predict risk for severity of COVID-19, J. Med. Virol, doi:10.1002/jmv.26097
Ali, Role of vitamin D in preventing of COVID-19 infection, progression and severity, J. Infect. Public Health, doi:10.1016/j.jiph.2020.06.021
Almerighi, 1Alpha,25-dihydroxyvitamin D3 inhibits CD40L-induced pro-inflammatory and immunomodulatory activity in human monocytes, Cytokine, doi:10.1016/j.cyto.2008.12.009
Aoshi, Koyama, Kobiyama, Akira, Ishii, Innate and adaptive immune responses to viral infection and vaccination, Curr. Opin. Virol, doi:10.1016/j.coviro.2011.07.002
Baktash, Vitamin D status and outcomes for hospitalised older patients with COVID-19, Postgrad. Med. J, doi:10.1136/postgradmedj-2020-138712
Barassi, Vitamin D in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) patients with non-invasive ventilation support, Panminerva Med, doi:10.23736/S0031-0808.21.04277-4
Bellia, Serum 25-hydroxyvitamin D levels are inversely associated with systemic inflammation in severe obese subjects, Intern. Emerg. Med, doi:10.1007/s11739-011-0559-x
Bert, SARS-CoV-2-specific T cell immunity in cases of COVID-19 and SARS, and uninfected controls, Nature, doi:10.1038/s41586-020-2550-z
Carpagnano, Vitamin D deficiency as a predictor of poor prognosis in patients with acute respiratory failure due to COVID-19, J. Endocrinol. Investig, doi:10.1007/s40618-020-01370-x
Chadha, Effect of 25-hydroxyvitamin D status on serological response to influenza vaccine in prostate cancer patients, Prostate, doi:10.1002/pros.21250
Charoenngam, Holick, Immunologic effects of vitamin D on human health and disease, Nutrients, doi:10.3390/nu12072097
Cruz, Interleukin-6 Is a biomarker for the development of fatal severe acute respiratory syndrome coronavirus 2 oxi, Front. Immunol, doi:10.3389/fimmu.2021.613422
Daneshkhah, Evidence for possible association of vitamin D status with cytokine storm and unregulated inflammation in COVID-19 patients, Aging Clin. Exp. Res, doi:10.1007/s40520-020-01677-y
Darif, The pro-inflammatory cytokines in COVID-19 pathogenesis: What goes wrong?, Microb. Pathog, doi:10.1016/j.micpath.2021.104799
Demir, Demir, Aygun, Vitamin D deficiency is associated with COVID-19 positivity and severity of the disease, J. Med. Virol, doi:10.1002/jmv.26832
Ebadi, Montano-Loza, Perspective: Improving vitamin D status in the management of COVID-19, Eur. J. Clin. Nutr, doi:10.1038/s41430-020-0661-0
Esperança-Martins, Humoral immune response of SARS-CoV-2-infected patients with cancer: Influencing factors and mechanisms, Oncologist, doi:10.1002/onco.13828
Faniyi, Vitamin D status and seroconversion for COVID-19 in UK healthcare workers, Eur. Respir. J, doi:10.1183/13993003.04234-2020
Figueiredo-Campos, Seroprevalence of anti-SARS-CoV-2 antibodies in COVID-19 patients and healthy volunteers up to 6 months post disease onset, Eur. J. Immunol, doi:10.1002/eji.202048970
Gao, The dichotomous and incomplete adaptive immunity in COVID-19 patients with different disease severity, Signal Transduct. Target Ther, doi:10.1038/s41392-021-00525-3
Ghasemian, The role of vitamin D in the age of COVID-19: A systematic review and meta-analysis, Int. J. Clin. Pract, doi:10.1111/ijcp.14675
Ghashut, Talwar, Kinsella, Duncan, Mcmillan, The effect of the systemic inflammatory response on plasma vitamin 25 (OH) D concentrations adjusted for albumin, PLoS One, doi:10.1371/journal.pone.0092614
Gozalbo-Rovira, SARS-CoV-2 antibodies, serum inflammatory biomarkers and clinical severity of hospitalized COVID-19 patients, J. Clin. Virol, doi:10.1016/j.jcv.2020.104611
Hastie, Pell, Sattar, Vitamin D and COVID-19 infection and mortality in UK Biobank, Eur. J. Nutr, doi:10.1007/s00394-020-02372-4
Hoepel, High titers and low fucosylation of early human anti-SARS-CoV-2 IgG promote inflammation by alveolar macrophages, Sci. Transl. Med, doi:10.1126/scitranslmed.abf8654
Honardoost, Ghavideldarestani, Khamseh, Role of Vitamin D in pathogenesis and severity of COVID-19 infection, Arch. Physiol. Biochem, doi:10.1080/13813455.2020.1792505
Ibarrondo, Rapid decay of anti-SARS-CoV-2 antibodies in persons with mild covid-19, N. Engl. J. Med, doi:10.1056/NEJMc2025179
Ilie, Stefanescu, Smith, The role of vitamin D in the prevention of coronavirus disease 2019 infection and mortality, Aging Clin. Exp. Res, doi:10.1007/s40520-020-01570-8
Jain, Analysis of vitamin D level among asymptomatic and critically ill COVID-19 patients and its correlation with inflammatory markers, Sci. Rep, doi:10.1038/s41598-020-77093-z
Jego, Plasmacytoid dendritic cells induce plasma cell differentiation through type I interferon and interleukin 6, Immunity, doi:10.1016/s1074-7613(03)00208-5
Kalia, Studzinski, Sarkar, Role of Vitamin D in regulating COVID-19 severity-An immunological perspective, J. Leukoc. Biol, doi:10.1002/JLB.4COVR1020-698R
Kaufman, Niles, Kroll, Bi, Holick, SARS-CoV-2 positivity rates associated with circulating 25-hydroxyvitamin D levels, PLoS One, doi:10.1371/journal.pone.0239252
Kebapcilar, Relationship between mean platelet volume and low-grade systemic coagulation with vitamin D deficiency in primary ovarian insufficiency, Arch. Gynecol. Obstet, doi:10.1007/s00404-013-2735-x
Kerget, Evaluation of the relationship of serum vitamin D levels in COVID-19 patients with clinical course and prognosis. COVID-19 hastalarında serum vitamin D düzeyinin klinik seyir ve prognozla ilişkisinin değerlendirilmesi, Tuberk Toraks, doi:10.5578/tt.70027
Kutsuna, Factors associated with anti-SARS-CoV-2 IgG antibody production in patients convalescing from COVID-19, J. Infect. Chemother, doi:10.1016/j.jiac.2021.01.006
Lee, Dynamics of anti-SARS-Cov-2 IgM and IgG antibodies among COVID-19 patients, J. Infect, doi:10.1016/j.jinf.2020.04.019
Li, Dynamic changes in anti-SARS-CoV-2 antibodies during SARS-CoV-2 infection and recovery from COVID-19, Nat. Commun, doi:10.1038/s41467-020-19943-y
Li, Patient and clinical factors at admission affect the levels of neutralizing antibodies six months after recovering from COVID-19, Viruses, doi:10.3390/v14010080
Li, Tong, Bare, Devlin, Assessment of the association of vitamin D level with SARS-CoV-2 seropositivity among working-age adults, JAMA Netw. Open, doi:10.1001/jamanetworkopen.2021.11634
Long, Clinical and immunological assessment of asymptomatic SARS-CoV-2 infections, Nat. Med, doi:10.1038/s41591-020-0965-6
Ma, Decline of SARS-CoV-2-specific IgG, IgM and IgA in convalescent COVID-19 patients within 100 days after hospital discharge, Sci. China Life Sci, doi:10.1007/s11427-020-1805-0
Marklund, Serum-IgG responses to SARS-CoV-2 after mild and severe COVID-19 infection and analysis of IgG nonresponders, PLoS ONE, doi:10.1371/journal.pone.0241104
Mcgregor, An autocrine vitamin D-driven Th1 shutdown program can be exploited for COVID-19, doi:10.1101/2020.07.18.210161
Mellenthin, Association between serum vitamin D concentrations and inflammatory markers in the general adult population, Metabolism, doi:10.1016/j.metabol.2014.05.002
Moutchia, Clinical laboratory parameters associated with severe or critical novel coronavirus disease 2019 (COVID-19): A systematic review and meta-analysis, PLoS One, doi:10.1371/journal.pone.0239802
Munshi, Vitamin D insufficiency as a potential culprit in critical COVID-19 patients, J. Med. Virol, doi:10.1002/jmv.26360
Ni, Detection of SARS-CoV-2-specific humoral and cellular immunity in COVID-19 convalescent individuals, Immunity, doi:10.1016/j.immuni.2020.04.023
Olbei, SARS-CoV-2 causes a different cytokine response compared to other cytokine storm-causing respiratory viruses in severely ill patients, Front. Immunol, doi:10.3389/fimmu.2021.629193
Palaniswamy, Could vitamin D reduce obesity-associated inflammation? Observational and Mendelian randomization study, Am. J. Clin. Nutr, doi:10.1093/ajcn/nqaa056
Robbiani, Convergent antibody responses to SARS-CoV-2 in convalescent individuals, Nature, doi:10.1038/s41586-020-2456-9
Sassi, Tamone, D' Amelio, Vitamin, nutrient, hormone, and immunomodulator, Nutrients, doi:10.3390/nu10111656
Sholukh, Evaluation of SARS-CoV-2 neutralization assays for antibody monitoring in natural infection and vaccine trials, doi:10.1101/2020.12.07.20245431
Terpos, Hematological findings and complications of COVID-19, Am. J. Hematol, doi:10.1002/ajh.25829
Thomson, Toscano-Guerra, Casis, Paciucci, C1 esterase inhibitor and the contact system in COVID-19, Br. J. Haematol, doi:10.1111/bjh.16938
Tjendra, Predicting disease severity and outcome in COVID-19 patients: A review of multiple biomarkers, Arch. Pathol. Lab. Med, doi:10.5858/arpa.2020-0471-SA
To, Temporal profiles of viral load in posterior oropharyngeal saliva samples and serum antibody responses during infection by SARS-CoV-2: An observational cohort study, Lancet Infect. Dis, doi:10.1016/S1473-3099(20)30196-1
Vinuesa, Linterman, Yu, Maclennan, Follicular helper T cells, Annu. Rev. Immunol, doi:10.1146/annurev-immunol-041015-055605
Wu, Clinical characteristics and immune injury mechanisms in 71 patients with COVID-19, mSphere, doi:10.1128/mSphere.00362-20
Yisak, Effects of Vitamin D on COVID-19 infection and prognosis: A systematic review, Risk Manag. Healthc. Policy, doi:10.2147/RMHP.S291584
Zhao, A comparative study of the laboratory features of COVID-19 and other viral pneumonias in the recovery stage, J. Clin. Lab. Anal, doi:10.1002/jcla.23483
Zhao, Antibody responses to SARS-CoV-2 in patients with novel coronavirus disease 2019, Clin. Infect. Dis, doi:10.1093/cid/ciaa344
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