Evidence map›Paper›PMID 33620098›Full record

ArticleJournal of medical virology2021

Antibody response patterns in COVID-19 patients with different levels of disease severity in Japan.

Kazuo Imai, Yutaro Kitagawa, Sakiko Tabata, Katsumi Kubota, Mayu Nagura-Ikeda, Masaru Matsuoka, Kazuyasu Miyoshi, Jun Sakai, Noriomi Ishibashi, Norihito Tarumoto and 5 more

Abstract read
In one paragraph

Article in Journal of medical virology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

41 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Kazuo ImaiDepartment of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan.ORCID https://orcid.org/0000-0002-8416-7371
Yutaro KitagawaDepartment of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan.
Sakiko TabataDepartment of Internal Medicine, Self-Defense Forces Central Hospital, Tokyo, Japan.
Katsumi KubotaDepartment of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan.
Mayu Nagura-IkedaDepartment of Internal Medicine, Self-Defense Forces Central Hospital, Tokyo, Japan.
Masaru MatsuokaDepartment of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan.
Kazuyasu MiyoshiDepartment of Internal Medicine, Self-Defense Forces Central Hospital, Tokyo, Japan.
Jun SakaiDepartment of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan.
Noriomi IshibashiDepartment of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan.
Norihito TarumotoDepartment of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan.
Shinichi TakeuchiDepartment of Clinical Laboratory, Saitama Medical University Hospital, Saitama, Japan.
Toshimitsu ItoDepartment of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan.
Shigefumi MaesakiDepartment of Infectious Disease and Infection Control, Saitama Medical University, Saitama, Japan.
Kaku TamuraDepartment of Internal Medicine, Self-Defense Forces Central Hospital, Tokyo, Japan.
Takuya MaedaCenter for Clinical Infectious Diseases and Research, Saitama Medical University, Saitama, Japan.ORCID http://orcid.org/0000-0003-0912-4643

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We analyzed antibody response patterns according to the level of disease severity in patients with novel coronavirus disease 2019 (COVID-19) in Japan. We analyzed 611 serum specimens from 231 patients with COVID-19 (mild, 170; severe, 31; critical, 30). Immunoglobulin M (IgM) and IgG antibodies against nucleocapsid protein (N) and spike 1 protein (S1) were detected by enzyme-linked immunosorbent assays. The peaks of fitting curves for the optical density (OD) values of IgM and IgG antibodies against N appeared simultaneously, while those against S1 were delayed compared with N. The OD values of IgM against N and IgG against both N and S1 were significantly higher in the severe and critical cases than in the mild cases at 11 days after symptom onset. The seroconversion rates of IgG were higher than those of IgM against both N and S1 during the clinical course based on the optimal cut-off values defined in this study. The seroconversion rates of IgG and IgM against N and S1 were higher in the severe and critical cases than in the mild cases. Our findings show that a stronger antibody response occurred in COVID-19 patients with greater disease severity and there were low seroconversion rates of antibodies against N and S1 in the mild cases.

Indexed as

Antibodies, ViralCOVID-19HumansImmunoglobulin GImmunoglobulin MJapanSARS-CoV-2Antibodies, ViralImmunoglobulin GImmunoglobulin MantibodyCOVID-19ELISAJapanSARS-CoV-2

Identifiers

PMID33620098
PMCPMC8014305

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.