Myelin Oligodendrocyte Glycoprotein Antibody-Mediated Optic Neuritis Following COVID-19 Vaccination

Optic neuritis following COVID-19 vaccination: Case series and review of the literature

OBJECTIVE

To review cases of optic neuritis after COVID-19 vaccination and add similar cases to the literature.

METHODS

Thorough PubMed and Scopus searches were conducted, and data from studies describing optic neuritis after COVID-19 vaccination were extracted, tabulated, pooled, and reviewed.

RESULTS

We present 6 cases of optic neuritis following COVID-19 vaccination. Our literature search yielded 48 similar cases. All 54 cases were divided into 3 groups with respect to their serostatus: (1) double-seronegative or unknown serostatus optic neuritis cases, (2) myelin oligodendrocyte glycoprotein (MOG)-associated optic neuritis cases, and (3) aquaporin-4-associated optic neuritis cases. Data from each group were separately pooled and reviewed. While the most frequent vaccine among the anti-AQP4+ subgroup was BNT162b2 (Pfizer-BioNTech) (2/3), recombinant vaccines, e.g., AZD122 and Ad26.Cov2.s were mostly injected in the other subgroups (23/51). No significant gender inclination was seen among different subgroups. The mean interval from vaccination to symptom onset was less than one month in all subgroups; symptom manifestations mainly occurred after the first dose (28/54). Almost all cases showed improvement after steroid therapy±plasma exchange (52/54).

CONCLUSION

Despite having rare side effects such as optic neuritis, vaccination remains our most helpful protection against SARS-CoV-2. Nevertheless, larger studies are needed to ascertain the pathophysiology of such adverse effects. Likewise, the association between COVID-19 vaccination and optic neuritis warrants further investigation.

Central nervous system manifestations following vaccination against COVID-19

Coronavirus disease 2019 (COVID-19) vaccination has become the most effective countermeasure in the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. However, vaccination is associated with side effects. This narrative review focuses on central nervous system (CNS) manifestations following COVID-19 vaccination and provides a summary of the potential underlying mechanisms and methods of diagnosis and management of the vaccination-related CNS manifestations. Headache, myalgia, optic neuritis, seizure, multiple sclerosis, acute disseminated encephalomyelitis and encephalitis, delirium, acute transverse myelitis, and stroke have been reported after COVID-19 vaccination. Constant headache and myalgia are common manifestations that may necessitate further clinical investigation for stroke. To limit consequences, it is imperative to follow standard treatment protocols for each neurological disorder following COVID-19 vaccination. Immunosuppressive medication can be helpful in the treatment of seizures following vaccination since the immune response is involved in their etiology. Clinicians should be aware of the manifestations after COVID-19 vaccination to respond promptly and effectively. Clinical guidelines for the management of CNS manifestations following COVID-19 vaccination are in high demand and would be useful in each new SARS-CoV-2 variant pandemic.

Systematic review exploring the clinical features of optic neuritis after SARS-CoV infection and vaccination

BACKGROUND

This study aims to characterise the symptoms and clinical features of optic neuritis (ON) following SARS-CoV-2 infection and vaccination.

METHOD

A literature search was conducted in four databases (PubMed, Medline, Embase and Google Scholar) to identify relevant case reports and case series. The records were screened and articles adhering to the inclusion criteria were critically appraised.

RESULTS

Sixty-eight studies were found to be eligible for inclusion, including 34 reporting ON following SARS-CoV-2 infection and an equal number reporting cases postvaccination. In total 93 patients and 125 eyes were included. The infection cohort included 42 patients and 56 eyes, 51.2% were female and 33.3% experienced bilateral ON. The mean visual acuity was 1.64 log of minimum angle of resolution (LogMAR), while pain was present in 77.8%. Oligoclonal bands were present in 3 patients, myelin oligodendrocyte glycoprotein (MOG) antibodies in 18 patients and AQP-4 antibodies in 4 patients. The vaccination cohort included 51 patients and 69 eyes. 60.8% were female and 35.3% had a bilateral ON. The mean visual acuity was 0.93 LogMAR. Oligoclonal bands were present in 46.7%, MOG antibodies in nine patients and AQP-4 antibodies in three patients.

CONCLUSION

Patients with ON post-SARS-CoV infection were more likely to experience severe visual impairment than in cases following vaccination. Further research is required to outline the clinical features of ON after COVID-19 infection and vaccination, and establish causality.

Optic Neuritis After SARS-CoV-2 Vaccination

BACKGROUND

To describe recent cases of optic neuritis in patients who received a vaccine for COVID-19.

METHODS

Retrospective case series of patients diagnosed with optic neuritis after a recent COVID-19 vaccination with BNT162b2 (Pfizer-BioNTech), in one university-affiliated tertiary hospital, from January 2021 to June 2021. Data were obtained from medical charts.

RESULTS

We describe 7 patients who developed optic neuritis after immunization with the BNT162b2 vaccine.

CONCLUSIONS

A causal relationship cannot be deduced, and the importance of COVID-19 vaccination is not challenged. However, the authors encourage a prospective monitoring and reporting system for all patients receiving COVID-19 vaccines, to further assess the spectrum of adverse events in large databases.