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1. Characterization of the Proinflammatory Cytokine Profile during Acute SARS-CoV-2 Infection in People with Human Immunodeficiency Virus.

Author

Anzurez A, Runtuwene L, Dang TTT, Nakayama-Hosoya K, Koga M, Yoshimura Y, Sasaki H, Miyata N, Miyazaki K, Takahashi Y, Suzuki T, Yotsuyanagi H, Tachikawa N, Matano T, and Kawana-Tachikawa A

Subjects
Humans, Male, Middle Aged, Female, Adult, SARS-CoV-2 immunology, Inflammation blood, Aged, COVID-19 immunology, COVID-19 blood, Cytokines blood, HIV Infections immunology, HIV Infections blood, HIV Infections complications
Abstract

Persistent inflammation during chronic human immunodeficiency virus (HIV) infection may affect the immune response against severe acute respiratory syndrome-coronavirus 2 (SARS- CoV-2) infection. Plasma levels of multiple proinflammatory cytokines during acute SARS-CoV-2 infection were measured in people with HIV (PWH) with effective combination antiretroviral therapy. There were no significant differences in any of the measured cytokines between severity levels of coronavirus disease 2019 (COVID-19) in PWH, while most were significantly higher in HIV-uninfected individuals with severe COVID-19, suggesting that excess cytokines release by hyperinflammatory responses do not occur in individuals with severe COVID-19 with HIV infection. The strong associations between the cytokines observed in HIV-uninfected individuals, particularly between IFN-α/TNF-α and other cytokines, were lost in PWH. The steady-state plasma levels of IP-10, ICAM-1, and CD62E were significantly higher in PWH, indicating that they were in an enhanced inflammatory state. The absence of several inter-cytokine correlations was observed in in vitro lipopolysaccharide stimulus-driven cytokine production in PWH. These data suggest that inflammatory responses during SARS-CoV-2 infection in PWH are distinct from those in HIV-uninfected individuals, partially because of the underlying inflammatory state and/or impairment of innate immune cells.

Published
2024
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2. Safety and efficacy of 5-aminolevulinic acid phosphate/iron in mild-to-moderate coronavirus disease 2019: A randomized exploratory phase II trial.

Author

Tanaka T, Tashiro M, Ota K, Fujita A, Sawai T, Kadota J, Fukuda Y, Sumiyoshi M, Ide S, Tachikawa N, Fujii H, Hibino M, Shiomi H, Izumida M, Matsui K, Yamauchi M, Takahashi K, Yamanashi H, Sugimoto T, Akabame S, Umeda M, Shimizu M, Hosogaya N, Kosai K, Takeda K, Iwanaga N, Ashizawa N, Hirayama T, Takazono T, Yamamoto K, Imamura Y, Miyazaki T, Kobayashi Y, Ariyoshi K, Mukae H, Yanagihara K, Kita K, and Izumikawa K

Subjects
Humans, Iron, Phosphates, Prospective Studies, SARS-CoV-2, Aminolevulinic Acid, COVID-19
Abstract

Background: 5-aminolevulinic acid (5-ALA), a natural amino acid that is marketed alongside sodium ferrous citrate (SFC) as a functional food, blocks severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) proliferation in vitro and exerts anti-inflammatory effects. In this phase II open-label, prospective, parallel-group, randomized trial, we aimed to evaluate the safety and efficacy of 5-ALA in patients with mild-to-moderate coronavirus disease 2019., Methods: This trial was conducted in patients receiving 5-ALA/SFC (250/145 mg) orally thrice daily for 7 days, followed by 5-ALA/SFC (150/87 mg) orally thrice daily for 7 days. The primary endpoints were changes in SARS-CoV-2 viral load, clinical symptom scores, and 5-ALA/SFC safety (adverse events [AE] and changes in laboratory values and vital signs)., Results: A total of 50 patients were enrolled from 8 institutions in Japan. The change in SARS-CoV-2 viral load from baseline was not significantly different between the 5-ALA/SFC (n = 24) and control (n = 26) groups. The duration to improvement was shorter in the 5-ALA/SFC group than in the control group, although the difference was not significant. The 5-ALA/SFC group exhibited faster improvement rates in "taste abnormality," "cough," "lethargy," and "no appetite" than the control group. Eight AEs were observed in the 5-ALA/SFC group, with 22.7% of patients experiencing gastrointestinal symptoms (decreased appetite, constipation, and vomiting). AEs occurred with 750/435 mg/day in 25.0% of patients in the first phase and with 450/261 mg/day of 5-ALA/SFC in 6.3% of patients in the second phase., Conclusion: 5-ALA/SFC improved some symptoms but did not influence the SARS-CoV-2 viral load or clinical symptom scores over 14 days. The safety of 5-ALA/SFC in this study was acceptable. Further evaluation using a larger sample size or modified method is warranted., (Copyright © 2023 the Author(s). Published by Wolters Kluwer Health, Inc.)

Published
2023
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3. Earliest histopathological changes in COVID-19 pneumonia with comprehensive gene expression analyses: A case series study.

Author

Okudela K, Hayashi H, Yoshimura Y, Sasaki H, Miyata N, Iwashita H, Kataoka T, Matsumura M, Mitsui H, Hatayama Y, Yamashiro T, Ryo A, and Tachikawa N

Subjects
Humans, Endothelial Cells, Lung pathology, Autopsy, Gene Expression, COVID-19 pathology
Abstract

Aims: In COVID-19 pneumonia, early detection and appropriate treatment are essential to prevent severe exacerbation. Therefore, it is important to understand the initiating events of COVID-19 pneumonia. However, at present, the literature about early stage disease has been very limited. Here, we investigated the earliest histopathological changes and gene expression profiles associated with COVID-19 pneumonia., Methods and Results: We carefully examined 25 autopsied cases with different clinical courses. Dilation of capillaries and edematous thickening of the alveolar septa were found even in areas that macroscopically looked almost normal. Pneumocytes, histocytes/macrophages, and vascular endothelial cells were immunohistochemically positive for tissue factor, which is an important early responder to tissue injuries. Comprehensive gene expression analyses revealed that those lesions presented differential profiles compared to those of control lungs and were associated with a significant upregulation of the lysosomal pathway., Conclusions: Alveolar capillary dilation and edematous thickening may be the earliest histopathological change detected in COVID-19 pneumonia. Intensive investigations of such lesions may lead to an understanding of the initiating event of not only COVID-19 pneumonia but also of general diffuse alveolar damage., (©The Author(s) 2023. Open Access. This article is licensed under a Creative Commons CC-BY International License.)

Published
2023
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4. Multimodal single-cell analyses of peripheral blood mononuclear cells of COVID-19 patients in Japan.

Author

Kashima Y, Mizutani T, Nakayama-Hosoya K, Moriyama S, Matsumura T, Yoshimura Y, Sasaki H, Horiuchi H, Miyata N, Miyazaki K, Tachikawa N, Takahashi Y, Suzuki T, Sugano S, Matano T, Kawana-Tachikawa A, and Suzuki Y

Subjects
Humans, Aged, SARS-CoV-2, Leukocytes, Mononuclear, Japan epidemiology, Single-Cell Analysis, Receptors, Antigen, T-Cell, COVID-19
Abstract

SARS-CoV-2 continues to spread worldwide. Patients with COVID-19 show distinct clinical symptoms. Although many studies have reported various causes for the diversity of symptoms, the underlying mechanisms are not fully understood. Peripheral blood mononuclear cells from COVID-19 patients were collected longitudinally, and single-cell transcriptome and T cell receptor repertoire analysis was performed. Comparison of molecular features and patients' clinical information revealed that the proportions of cells present, and gene expression profiles differed significantly between mild and severe cases; although even among severe cases, substantial differences were observed among the patients. In one severely-infected elderly patient, an effective antibody response seemed to have failed, which may have caused prolonged viral clearance. Naïve T cell depletion, low T cell receptor repertoire diversity, and aberrant hyperactivation of most immune cell subsets were observed during the acute phase in this patient. Through this study, we provided a better understanding of the diversity of immune landscapes and responses. The information obtained from this study can help medical professionals develop personalized optimal clinical treatment strategies for COVID-19., (© 2023. The Author(s).)

Published
2023
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5. DOCK2 is involved in the host genetics and biology of severe COVID-19.

Author

Namkoong H, Edahiro R, Takano T, Nishihara H, Shirai Y, Sonehara K, Tanaka H, Azekawa S, Mikami Y, Lee H, Hasegawa T, Okudela K, Okuzaki D, Motooka D, Kanai M, Naito T, Yamamoto K, Wang QS, Saiki R, Ishihara R, Matsubara Y, Hamamoto J, Hayashi H, Yoshimura Y, Tachikawa N, Yanagita E, Hyugaji T, Shimizu E, Katayama K, Kato Y, Morita T, Takahashi K, Harada N, Naito T, Hiki M, Matsushita Y, Takagi H, Aoki R, Nakamura A, Harada S, Sasano H, Kabata H, Masaki K, Kamata H, Ikemura S, Chubachi S, Okamori S, Terai H, Morita A, Asakura T, Sasaki J, Morisaki H, Uwamino Y, Nanki K, Uchida S, Uno S, Nishimura T, Ishiguro T, Isono T, Shibata S, Matsui Y, Hosoda C, Takano K, Nishida T, Kobayashi Y, Takaku Y, Takayanagi N, Ueda S, Tada A, Miyawaki M, Yamamoto M, Yoshida E, Hayashi R, Nagasaka T, Arai S, Kaneko Y, Sasaki K, Tagaya E, Kawana M, Arimura K, Takahashi K, Anzai T, Ito S, Endo A, Uchimura Y, Miyazaki Y, Honda T, Tateishi T, Tohda S, Ichimura N, Sonobe K, Sassa CT, Nakajima J, Nakano Y, Nakajima Y, Anan R, Arai R, Kurihara Y, Harada Y, Nishio K, Ueda T, Azuma M, Saito R, Sado T, Miyazaki Y, Sato R, Haruta Y, Nagasaki T, Yasui Y, Hasegawa Y, Mutoh Y, Kimura T, Sato T, Takei R, Hagimoto S, Noguchi Y, Yamano Y, Sasano H, Ota S, Nakamori Y, Yoshiya K, Saito F, Yoshihara T, Wada D, Iwamura H, Kanayama S, Maruyama S, Yoshiyama T, Ohta K, Kokuto H, Ogata H, Tanaka Y, Arakawa K, Shimoda M, Osawa T, Tateno H, Hase I, Yoshida S, Suzuki S, Kawada M, Horinouchi H, Saito F, Mitamura K, Hagihara M, Ochi J, Uchida T, Baba R, Arai D, Ogura T, Takahashi H, Hagiwara S, Nagao G, Konishi S, Nakachi I, Murakami K, Yamada M, Sugiura H, Sano H, Matsumoto S, Kimura N, Ono Y, Baba H, Suzuki Y, Nakayama S, Masuzawa K, Namba S, Suzuki K, Naito Y, Liu YC, Takuwa A, Sugihara F, Wing JB, Sakakibara S, Hizawa N, Shiroyama T, Miyawaki S, Kawamura Y, Nakayama A, Matsuo H, Maeda Y, Nii T, Noda Y, Niitsu T, Adachi Y, Enomoto T, Amiya S, Hara R, Yamaguchi Y, Murakami T, Kuge T, Matsumoto K, Yamamoto Y, Yamamoto M, Yoneda M, Kishikawa T, Yamada S, Kawabata S, Kijima N, Takagaki M, Sasa N, Ueno Y, Suzuki M, Takemoto N, Eguchi H, Fukusumi T, Imai T, Fukushima M, Kishima H, Inohara H, Tomono K, Kato K, Takahashi M, Matsuda F, Hirata H, Takeda Y, Koh H, Manabe T, Funatsu Y, Ito F, Fukui T, Shinozuka K, Kohashi S, Miyazaki M, Shoko T, Kojima M, Adachi T, Ishikawa M, Takahashi K, Inoue T, Hirano T, Kobayashi K, Takaoka H, Watanabe K, Miyazawa N, Kimura Y, Sado R, Sugimoto H, Kamiya A, Kuwahara N, Fujiwara A, Matsunaga T, Sato Y, Okada T, Hirai Y, Kawashima H, Narita A, Niwa K, Sekikawa Y, Nishi K, Nishitsuji M, Tani M, Suzuki J, Nakatsumi H, Ogura T, Kitamura H, Hagiwara E, Murohashi K, Okabayashi H, Mochimaru T, Nukaga S, Satomi R, Oyamada Y, Mori N, Baba T, Fukui Y, Odate M, Mashimo S, Makino Y, Yagi K, Hashiguchi M, Kagyo J, Shiomi T, Fuke S, Saito H, Tsuchida T, Fujitani S, Takita M, Morikawa D, Yoshida T, Izumo T, Inomata M, Kuse N, Awano N, Tone M, Ito A, Nakamura Y, Hoshino K, Maruyama J, Ishikura H, Takata T, Odani T, Amishima M, Hattori T, Shichinohe Y, Kagaya T, Kita T, Ohta K, Sakagami S, Koshida K, Hayashi K, Shimizu T, Kozu Y, Hiranuma H, Gon Y, Izumi N, Nagata K, Ueda K, Taki R, Hanada S, Kawamura K, Ichikado K, Nishiyama K, Muranaka H, Nakamura K, Hashimoto N, Wakahara K, Sakamoto K, Omote N, Ando A, Kodama N, Kaneyama Y, Maeda S, Kuraki T, Matsumoto T, Yokote K, Nakada TA, Abe R, Oshima T, Shimada T, Harada M, Takahashi T, Ono H, Sakurai T, Shibusawa T, Kimizuka Y, Kawana A, Sano T, Watanabe C, Suematsu R, Sageshima H, Yoshifuji A, Ito K, Takahashi S, Ishioka K, Nakamura M, Masuda M, Wakabayashi A, Watanabe H, Ueda S, Nishikawa M, Chihara Y, Takeuchi M, Onoi K, Shinozuka J, Sueyoshi A, Nagasaki Y, Okamoto M, Ishihara S, Shimo M, Tokunaga Y, Kusaka Y, Ohba T, Isogai S, Ogawa A, Inoue T, Fukuyama S, Eriguchi Y, Yonekawa A, Kan-O K, Matsumoto K, Kanaoka K, Ihara S, Komuta K, Inoue Y, Chiba S, Yamagata K, Hiramatsu Y, Kai H, Asano K, Oguma T, Ito Y, Hashimoto S, Yamasaki M, Kasamatsu Y, Komase Y, Hida N, Tsuburai T, Oyama B, Takada M, Kanda H, Kitagawa Y, Fukuta T, Miyake T, Yoshida S, Ogura S, Abe S, Kono Y, Togashi Y, Takoi H, Kikuchi R, Ogawa S, Ogata T, Ishihara S, Kanehiro A, Ozaki S, Fuchimoto Y, Wada S, Fujimoto N, Nishiyama K, Terashima M, Beppu S, Yoshida K, Narumoto O, Nagai H, Ooshima N, Motegi M, Umeda A, Miyagawa K, Shimada H, Endo M, Ohira Y, Watanabe M, Inoue S, Igarashi A, Sato M, Sagara H, Tanaka A, Ohta S, Kimura T, Shibata Y, Tanino Y, Nikaido T, Minemura H, Sato Y, Yamada Y, Hashino T, Shinoki M, Iwagoe H, Takahashi H, Fujii K, Kishi H, Kanai M, Imamura T, Yamashita T, Yatomi M, Maeno T, Hayashi S, Takahashi M, Kuramochi M, Kamimaki I, Tominaga Y, Ishii T, Utsugi M, Ono A, Tanaka T, Kashiwada T, Fujita K, Saito Y, Seike M, Watanabe H, Matsuse H, Kodaka N, Nakano C, Oshio T, Hirouchi T, Makino S, Egi M, Omae Y, Nannya Y, Ueno T, Katayama K, Ai M, Fukui Y, Kumanogoh A, Sato T, Hasegawa N, Tokunaga K, Ishii M, Koike R, Kitagawa Y, Kimura A, Imoto S, Miyano S, Ogawa S, Kanai T, Fukunaga K, and Okada Y

Subjects
Alleles, Animals, Disease Models, Animal, Genetic Predisposition to Disease, Humans, Interferon Type I genetics, Interferon Type I immunology, Japan, Lung pathology, Macrophages, Mesocricetus, Middle Aged, Pneumonia complications, Pyrazoles pharmacology, RNA-Seq, Viral Load, Weight Loss, COVID-19 complications, COVID-19 genetics, COVID-19 immunology, COVID-19 physiopathology, GTPase-Activating Proteins antagonists & inhibitors, GTPase-Activating Proteins genetics, GTPase-Activating Proteins metabolism, Genome-Wide Association Study, Guanine Nucleotide Exchange Factors antagonists & inhibitors, Guanine Nucleotide Exchange Factors genetics, Guanine Nucleotide Exchange Factors metabolism, Host Microbial Interactions genetics, Host Microbial Interactions immunology, SARS-CoV-2 pathogenicity
Abstract

Identifying the host genetic factors underlying severe COVID-19 is an emerging challenge 1-5 . Here we conducted a genome-wide association study (GWAS) involving 2,393 cases of COVID-19 in a cohort of Japanese individuals collected during the initial waves of the pandemic, with 3,289 unaffected controls. We identified a variant on chromosome 5 at 5q35 (rs60200309-A), close to the dedicator of cytokinesis 2 gene (DOCK2), which was associated with severe COVID-19 in patients less than 65 years of age. This risk allele was prevalent in East Asian individuals but rare in Europeans, highlighting the value of genome-wide association studies in non-European populations. RNA-sequencing analysis of 473 bulk peripheral blood samples identified decreased expression of DOCK2 associated with the risk allele in these younger patients. DOCK2 expression was suppressed in patients with severe cases of COVID-19. Single-cell RNA-sequencing analysis (n = 61 individuals) identified cell-type-specific downregulation of DOCK2 and a COVID-19-specific decreasing effect of the risk allele on DOCK2 expression in non-classical monocytes. Immunohistochemistry of lung specimens from patients with severe COVID-19 pneumonia showed suppressed DOCK2 expression. Moreover, inhibition of DOCK2 function with CPYPP increased the severity of pneumonia in a Syrian hamster model of SARS-CoV-2 infection, characterized by weight loss, lung oedema, enhanced viral loads, impaired macrophage recruitment and dysregulated type I interferon responses. We conclude that DOCK2 has an important role in the host immune response to SARS-CoV-2 infection and the development of severe COVID-19, and could be further explored as a potential biomarker and/or therapeutic target., (© 2022. The Author(s).)

Published
2022
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6. An autopsy case of COVID-19-like acute respiratory distress syndrome after mRNA-1273 SARS-CoV-2 vaccination.

Author

Yoshimura Y, Sasaki H, Miyata N, Miyazaki K, Okudela K, Tateishi Y, Hayashi H, Kawana-Tachikawa A, Iwashita H, Maeda K, Ihama Y, Hatayama Y, Ryo A, and Tachikawa N

Subjects
2019-nCoV Vaccine mRNA-1273, Aged, 80 and over, Autopsy, COVID-19 Vaccines adverse effects, Dyspnea, Female, Humans, SARS-CoV-2, Vaccination, COVID-19, Respiratory Distress Syndrome etiology
Abstract

We report the first case with COVID-19-like acute respiratory distress syndrome after mRNA-1273 SARS-CoV-2 vaccination. An 88-year-old woman developed dyspnea several hours after vaccination with the second dose of mRNA-1273. She was hospitalized on day nine due to worsening dyspnea. Chest computed tomography showed bilateral ground-glass opacities and consolidations, mainly in the peripheral lung areas. Repeat polymerase chain reaction tests for SARS-CoV-2 were negative, although the serum level of antibodies against spike protein was extremely elevated. Her condition did not improve with high-dose corticosteroids and high-flow nasal cannula oxygen therapy; she died on day 18. Autopsy findings revealed very early-phase diffuse alveolar damage in the whole lung without other lung diseases. The clinical and pathological findings suggested vaccine-induced acute respiratory distress syndrome. Serological and pathological tests might be useful to differentiate the disease from COVID-19., Competing Interests: Conflict of Interest Department of Infectious Disease and Respiratory Medicine of Yokohama Municipal Citizen's Hospital, to which Yukihiro Yoshimura, Hiroaki Sasaki, Nobuyuki Miyata, Kazuhito Miyazaki, and Natsuo Tachikawa belong, have received research funding from three companies, Gilead Sciences, Inc., Eli Lilly Japan K.K, and Ono Pharmaceutical Co., Ltd. in the last two years., (Copyright © 2022 The Authors. Published by Elsevier Ltd.. All rights reserved.)

Published
2022
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7. Recovery from severe persistent COVID-19 without evidence of an anti-SARS-CoV-2 antibody response in a man with mantle cell lymphoma treated with rituximab.

Author

Horiuchi H, Sasaki H, Miyazaki K, Miyata N, Yoshimura Y, and Tachikawa N

Subjects
Adult, Antibodies, Viral, Antibody Formation, Humans, Male, Rituximab therapeutic use, SARS-CoV-2, COVID-19, Lymphoma, Mantle-Cell drug therapy
Abstract

Lymphoma has been reported to worsen the prognosis of COVID-19 partly because it disturbs the normal production of antibodies. We treated a man with mantle cell lymphoma treated with rituximab, who developed severe COVID-19 with viral shedding that lasted for 78 days. He stayed in the intensive care unit for 28 days and did not respond to any treatment against COVID-19. His increased oxygen demand at rest eventually resolved despite the absence of anti-SARS-CoV-2-IgG. This case illustrates that recovery from COVID-19 can occur without antibody production, and that even patients with an inability to produce antibodies can recover from severe COVID-19. It also illustrates that lymphoma patients who develop severe COVID-19 while on rituximab therapy can recover from a prolonged viral shedding state if the acute lung injury can be overcome., (Copyright © 2021 Japanese Society of Chemotherapy and The Japanese Association for Infectious Diseases. Published by Elsevier Ltd. All rights reserved.)

Published
2022
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8. Antibody response after COVID-19 vaccine BNT162b2 on health care workers in Japan.

Author

Yoshimura Y, Sasaki H, Miyata N, Miyazaki K, and Tachikawa N

Subjects
Antibodies, Viral, Antibody Formation, BNT162 Vaccine, Health Personnel, Humans, Japan, Pandemics, Prospective Studies, SARS-CoV-2, COVID-19, COVID-19 Vaccines
Abstract

Background: Vaccination is one of the most important tools to control the COVID-19 pandemic. However, there is little information on the antibody response in humans after the COVID-19 vaccination., Methods: This single-center, prospective study was conducted in Yokohama, Japan. We included health care workers who had received two doses of COVID-19 vaccination (BNT162b2) 21 days apart. We measured serum immunoglobulin G (IgG) to nucleoprotein and spike protein of SARS-CoV-2 with commercially available kits before and 7, 14, and 35 days after the first dose of vaccination., Results: A total of 104 workers participated in this study. Of these, 7 participants were seropositive with antibodies to spike protein at baseline and 4 of the 7 seropositive participants had COVID-19 history. The mean level of IgG to spike protein (QT) was 45.2, 1219, 2845, and 23489 AU/mL at baseline, on days 7, 14, and 35, respectively, although the values for nucleoprotein (NG) were 0.2, 0.21, 0.22, and 0.19 S/C, respectively. On day 7, QT in seropositive participants at baseline was elevated, whereas it was not elevated in seronegative participants at baseline until day 14., Conclusions: QT was elevated over the cutoff in all the participants at day 35, but NG did not change between baseline and day 35., (Copyright © 2021 Japanese Society of Chemotherapy and The Japanese Association for Infectious Diseases. Published by Elsevier Ltd. All rights reserved.)

Published
2021
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9. Temporal maturation of neutralizing antibodies in COVID-19 convalescent individuals improves potency and breadth to circulating SARS-CoV-2 variants.

Author

Moriyama S, Adachi Y, Sato T, Tonouchi K, Sun L, Fukushi S, Yamada S, Kinoshita H, Nojima K, Kanno T, Tobiume M, Ishijima K, Kuroda Y, Park ES, Onodera T, Matsumura T, Takano T, Terahara K, Isogawa M, Nishiyama A, Kawana-Tachikawa A, Shinkai M, Tachikawa N, Nakamura S, Okai T, Okuma K, Matano T, Fujimoto T, Maeda K, Ohnishi M, Wakita T, Suzuki T, and Takahashi Y

Subjects
Antibodies, Monoclonal immunology, Antibody Specificity, COVID-19 epidemiology, Humans, Immunoglobulin G, Neutralization Tests, SARS-CoV-2 genetics, Viral Load, Antibodies, Neutralizing immunology, Antibodies, Viral immunology, COVID-19 immunology, COVID-19 virology, SARS-CoV-2 immunology
Abstract

Antibody titers against SARS-CoV-2 slowly wane over time. Here, we examined how time affects antibody potency. To assess the impact of antibody maturation on durable neutralizing activity against original SARS-CoV-2 and emerging variants of concern (VOCs), we analyzed receptor binding domain (RBD)-specific IgG antibodies in convalescent plasma taken 1-10 months after SARS-CoV-2 infection. Longitudinal evaluation of total RBD IgG and neutralizing antibody revealed declining total antibody titers but improved neutralization potency per antibody to original SARS-CoV-2, indicative of antibody response maturation. Neutralization assays with authentic viruses revealed that early antibodies capable of neutralizing original SARS-CoV-2 had limited reactivity toward B.1.351 (501Y.V2) and P.1 (501Y.V3) variants. Antibodies from late convalescents exhibited increased neutralization potency to VOCs, suggesting persistence of cross-neutralizing antibodies in plasma. Thus, maturation of the antibody response to SARS-CoV-2 potentiates cross-neutralizing ability to circulating variants, suggesting that declining antibody titers may not be indicative of declining protection., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2021 The Author(s). Published by Elsevier Inc. All rights reserved.)

Published
2021
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10. On-admission SARS-CoV-2 RNAemia as a single potent predictive marker of critical condition development and mortality in COVID-19.

Author

Miki S, Sasaki H, Horiuchi H, Miyata N, Yoshimura Y, Miyazaki K, Matsumura T, Takahashi Y, Suzuki T, Matano T, Kawana-Tachikawa A, and Tachikawa N

Subjects
Aged, Biomarkers analysis, COVID-19 mortality, COVID-19 Nucleic Acid Testing methods, Female, Humans, Male, Middle Aged, Nasal Mucosa virology, Patient Admission, Prognosis, SARS-CoV-2 genetics, SARS-CoV-2 isolation & purification, SARS-CoV-2 pathogenicity, Viral Load, COVID-19 diagnosis, COVID-19 Nucleic Acid Testing standards, RNA, Viral analysis
Abstract

Background: This study aimed to clarify how SARS-CoV-2 RNAemia is related to COVID-19 critical condition development and mortality in comparison with other predictive markers and scoring systems., Methods: This is a retrospective cohort study conducted at Yokohama Municipal Citizen's Hospital and National Institute of Infectious Diseases. We recruited adult patients with COVID-19 admitted between March 2020 and January 2021. We compared RNAemia with clinical status on admission including scoring systems such as the 4C Mortality, CURB-65, and A-DROP, as well as the Ct value of the nasopharyngeal PCR, in predicting COVID-19 mortality and critical condition development., Results: Of the 92 recruited patients (median age, 58; interquartile range, 45-71 years), 14 (14.9%) had RNAemia. These patients had an older age (median, 68 years vs. 55.5 years; p = 0.011), higher values of lactated dehydrogenase (median, 381 U/L vs. 256.5 U/L, p < 0.001), C-reactive protein (median, 10.9 mg/dL vs. 3.8 mg/dL; p < 0.001), D-dimer (median, 2.07 μg/mL vs. 1.28 μg/mL; p = 0.015), lower values of lymphocyte (median, 802/μL vs. 1007/μL, p = 0.025) and Ct of the nasopharyngeal PCR assay (median, 20.59 vs. 25.54; p = 0.021) than those without RNAemia. Univariate analysis showed RNAemia was associated with mortality (odds ratio [OR], 18.75; 95% confidence interval [CI], 3.92-89.76; area under the receiver operating characteristic curve [AUC], 0.7851; p = 0.002) and critical condition (OR, 72.00; 95% CI, 12.98-399.29; AUC, 0.8198; p < 0.001). Plus, multivariate analysis also revealed the association of RNAemia with critical condition (adjusted OR, 125.71; 95% CI, 11.47-1377.32; p < 0.001)., Conclusion: On-admission SARS-CoV-2 RNAemia is a potent predictive marker of COVID-19 critical condition and mortality. The adjusted OR for critical condition was as high as 125.71., Competing Interests: The authors have declared that no competing interests exist.

Published
2021
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11. Association of HLA-DRB1*09:01 with severe COVID-19.

Author

Anzurez A, Naka I, Miki S, Nakayama-Hosoya K, Isshiki M, Watanabe Y, Nakamura-Hoshi M, Seki S, Matsumura T, Takano T, Onodera T, Adachi Y, Moriyama S, Terahara K, Tachikawa N, Yoshimura Y, Sasaki H, Horiuchi H, Miyata N, Miyazaki K, Koga M, Ikeuchi K, Nagai H, Saito M, Adachi E, Yotsuyanagi H, Kutsuna S, Kawashima A, Miyazato Y, Kinoshita N, Kouno C, Tanaka K, Takahashi Y, Suzuki T, Matano T, Ohashi J, and Kawana-Tachikawa A

Subjects
Alleles, Gene Frequency, Genetic Predisposition to Disease, Genotype, Humans, COVID-19 diagnosis, COVID-19 genetics, HLA-DRB1 Chains genetics
Abstract

HLA-A, -C, -B, and -DRB1 genotypes were analyzed in 178 Japanese COVID-19 patients to investigate the association of HLA with severe COVID-19. Analysis of 32 common HLA alleles at four loci revealed a significant association between HLA-DRB1*09:01 and severe COVID-19 (odds ratio [OR], 3.62; 95% CI, 1.57-8.35; p = 0.00251 [permutation p value = 0.0418]) when age, sex, and other common HLA alleles at the DRB1 locus were adjusted. The DRB1*09:01 allele was more significantly associated with risk for severe COVID-19 compared to preexisting medical conditions such as hypertension, diabetes, and cardiovascular diseases. These results indicate a potential role for HLA in predisposition to severe COVID-19., (© 2021 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)

Published
2021
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12. The U-shaped association of serum iron level with disease severity in adult hospitalized patients with COVID-19.

Author

Tojo K, Sugawara Y, Oi Y, Ogawa F, Higurashi T, Yoshimura Y, Miyata N, Hayami H, Yamaguchi Y, Ishikawa Y, Takeuchi I, Tachikawa N, and Goto T

Subjects
Adult, Aged, COVID-19 complications, COVID-19 virology, Female, Ferritins blood, Hospitalization, Humans, Iron metabolism, Logistic Models, Male, Middle Aged, Respiratory Insufficiency etiology, SARS-CoV-2 isolation & purification, Severity of Illness Index, Transferrin analysis, COVID-19 pathology, Iron blood
Abstract

Coronavirus disease 2019 (COVID-19) is an emerging infectious disease that leads to severe respiratory failure (RF). It is known that host exposure to viral infection triggers an iron-lowering response to mitigate pathogenic load and tissue damage. However, the association between host iron-lowering response and COVID-19 severity is not clear. This two-center observational study of 136 adult hospitalized COVID-19 patients analyzed the association between disease severity and initial serum iron, total iron-binding capacity (TIBC), and transferrin saturation (TSAT) levels. Serum iron levels were significantly lower in patients with mild RF than in the non-RF group; however, there were no significant differences in iron levels between the non-RF and severe RF groups, depicting a U-shaped association between serum iron levels and disease severity. TIBC levels decreased significantly with increasing severity; consequently, TSAT was significantly higher in patients with severe RF than in other patients. Multivariate analysis including only patients with RF adjusted for age and sex demonstrated that higher serum iron and TSAT levels were independently associated with the development of severe RF, indicating that inadequate response to lower serum iron might be an exacerbating factor for COVID-19.

Published
2021
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13. Identification of B.1.346 Lineage of SARS-CoV-2 in Japan: Genomic Evidence of Re-entry of Clade 20C.

Author

Abe K, Shimura T, Takenouchi T, Iwasaki YW, Ishizu H, Uwamino Y, Uno S, Gotoh J, Tachikawa N, Takeuchi Y, Katayama J, Nozaki H, Fujii S, Seki S, Nakamura M, Uda K, Misumi T, Ishihara J, Yamada K, Kanai T, Murai S, Araki K, Ebihara T, Siomi H, Hasegawa N, Kitagawa Y, Amagai M, Suematsu M, and Kosaki K

Subjects
Humans, Phylogeny, COVID-19 virology, Genome, Viral, SARS-CoV-2 genetics, Whole Genome Sequencing methods
Abstract

SARS-CoV-2 whole-genome sequencing of samples from COVID-19 patients is useful for informing infection control. Datasets of these genomes assembled from multiple hospitals can give critical clues to regional or national trends in infection. Herein, we report a lineage summary based on data collected from hospitals located in the Tokyo metropolitan area. We performed SARS-CoV-2 whole-genome sequencing of specimens from 198 patients with COVID-19 at 13 collaborating hospitals located in the Kanto region. Phylogenetic analysis and fingerprinting of the nucleotide substitutions were performed to differentiate and classify the viral lineages. More than 90% of the identified strains belonged to Clade 20B, which has been prevalent in European countries since March 2020. Only two lineages (B.1.1.284 and B.1.1.214) were found to be predominant in Japan. However, one sample from a COVID-19 patient admitted to a hospital in the Kanto region in November 2020 belonged to the B.1.346 lineage of Clade 20C, which has been prevalent in the western United States since November 2020. The patient had no history of overseas travel or any known contact with anyone who had travelled abroad. Consequently, the Clade 20C strain belonging to the B.1.346 lineage appeared likely to have been imported from the western United States to Japan across the strict quarantine barrier. B.1.1.284 and B.1.1.214 lineages were found to be predominant in the Kanto region, but a single case of the B.1.346 lineage of clade 20C, probably imported from the western United States, was also identified. These results illustrate that a decentralized network of hospitals offers significant advantages as a highly responsive system for monitoring regional molecular epidemiologic trends.

Published
2021
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14. Corticosteroids for hospitalized patients with mild to critically-ill COVID-19: a multicenter, retrospective, propensity score-matched study.

Author

Ikeda S, Misumi T, Izumi S, Sakamoto K, Nishimura N, Ro S, Fukunaga K, Okamori S, Tachikawa N, Miyata N, Shinkai M, Shinoda M, Miyazaki Y, Iijima Y, Izumo T, Inomata M, Okamoto M, Yamaguchi T, Iwabuchi K, Masuda M, Takoi H, Oyamada Y, Fujitani S, Mineshita M, Ishii H, Nakagawa A, Yamaguchi N, Hibino M, Tsushima K, Nagai T, Ishikawa S, Ishikawa N, Kondoh Y, Yamazaki Y, Gocho K, Nishizawa T, Tsuzuku A, Yagi K, Shindo Y, Takeda Y, Yamanaka T, and Ogura T

Subjects
COVID-19 diagnostic imaging, COVID-19 pathology, Critical Illness, Female, Humans, Male, Middle Aged, Retrospective Studies, Adrenal Cortex Hormones administration & dosage, COVID-19 therapy, Hospitalization, Respiration, Artificial, SARS-CoV-2
Abstract

Corticosteroids use in coronavirus disease 2019 (COVID-19) is controversial, especially in mild to severe patients who do not require invasive/noninvasive ventilation. Moreover, many factors remain unclear regarding the appropriate use of corticosteroids for COVID-19. In this context, this multicenter, retrospective, propensity score-matched study was launched to evaluate the efficacy of systemic corticosteroid administration for hospitalized patients with COVID-19 ranging in the degree of severity from mild to critically-ill disease. This multicenter, retrospective study enrolled consecutive hospitalized COVID-19 patients diagnosed January-April 2020 across 30 institutions in Japan. Clinical outcomes were compared for COVID-19 patients who received or did not receive corticosteroids, after adjusting for propensity scores. The primary endpoint was the odds ratio (OR) for improvement on a 7-point ordinal score on Day 15. Of 1092 COVID-19 patients analyzed, 118 patients were assigned to either the corticosteroid and non-corticosteroid group, after propensity score matching. At baseline, most patients did not require invasive/noninvasive ventilation (85.6% corticosteroid group vs. 89.8% non-corticosteroid group). The odds of improvement in a 7-point ordinal score on Day 15 was significantly lower for the corticosteroid versus non-corticosteroid group (OR, 0.611; 95% confidence interval [CI], 0.388-0.962; p = 0.034). The time to improvement in radiological findings was significantly shorter in the corticosteroid versus non-corticosteroid group (hazard ratio [HR], 1.758; 95% CI, 1.323-2.337; p < 0.001), regardless of baseline clinical status. The duration of invasive mechanical ventilation was shorter in corticosteroid versus non-corticosteroid group (HR, 1.466; 95% CI, 0.841-2.554; p = 0.177). Of the 106 patients who received methylprednisolone, the duration of invasive mechanical ventilation was significantly shorter in the pulse/semi-pulse versus standard dose group (HR, 2.831; 95% CI, 1.347-5.950; p = 0.006). In conclusion, corticosteroids for hospitalized patients with COVID-19 did not improve clinical status on Day 15, but reduced the time to improvement in radiological findings for all patients regardless of disease severity and also reduced the duration of invasive mechanical ventilation in patients who required intubation.Trial registration: This study was registered in the University hospital Medical Information Network Clinical Trials Registry on April 21, 2020 (ID: UMIN000040211).

Published
2021
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15. Myeloid cell dynamics correlating with clinical outcomes of severe COVID-19 in Japan.

Author

Takano T, Matsumura T, Adachi Y, Terahara K, Moriyama S, Onodera T, Nishiyama A, Kawana-Tachikawa A, Miki S, Hosoya-Nakayama K, Nakamura-Hoshi M, Seki S, Tachikawa N, Yoshimura Y, Miyata N, Horiuchi H, Sasaki H, Miyazaki K, Kinoshita N, Sudo T, Akiyama Y, Sato R, Suzuki T, Matano T, and Takahashi Y

Subjects
Humans, Interleukin-8 immunology, Japan, Leukocyte Count, Myeloid Cells immunology, Neutrophil Activation immunology, COVID-19 pathology, Interleukin-8 blood, Myeloid-Derived Suppressor Cells immunology, Neutrophils immunology, SARS-CoV-2 immunology
Abstract

An expanded myeloid cell compartment is a hallmark of severe coronavirus disease 2019 (COVID-19). However, data regarding myeloid cell expansion have been collected in Europe, where the mortality rate by COVID-19 is greater than those in other regions including Japan. Thus, characteristics of COVID-19-induced myeloid cell subsets remain largely unknown in the regions with low mortality rates. Here, we analyzed cellular dynamics of myeloid-derived suppressor cell (MDSC) subsets and examined whether any of them correlate with disease severity and prognosis, using blood samples from Japanese COVID-19 patients. We observed that polymorphonuclear (PMN)-MDSCs, but not other MDSC subsets, transiently expanded in severe cases but not in mild or moderate cases. Contrary to previous studies in Europe, this subset selectively expanded in survivors of severe cases and subsided before discharge, but such transient expansion was not observed in non-survivors in Japanese cohort. Analysis of plasma cytokine/chemokine levels revealed positive correlation of PMN-MDSC frequencies with IL-8 levels, indicating the involvement of IL-8 on recruitment of PMN-MDSCs to peripheral blood following the onset of severe COVID-19. Our data indicate that transient expansion of the PMN-MDSC subset results in improved clinical outcome. Thus, this myeloid cell subset may be a predictor of prognosis in cases of severe COVID-19 in Japan., (© The Japanese Society for Immunology. 2021. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)

Published
2021
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16. Efficacy and safety of baricitinib for the treatment of hospitalised adults with COVID-19 (COV-BARRIER): a randomised, double-blind, parallel-group, placebo-controlled phase 3 trial

Author

Vincent C Marconi, Athimalaipet V Ramanan, Stephanie de Bono, Cynthia E Kartman, Venkatesh Krishnan, Ran Liao, Maria Lucia B Piruzeli, Jason D Goldman, Jorge Alatorre-Alexander, Rita de Cassia Pellegrini, Vicente Estrada, Mousumi Som, Anabela Cardoso, Sujatro Chakladar, Brenda Crowe, Paulo Reis, Xin Zhang, David H Adams, E Wesley Ely, Mi-Young Ahn, Miriam Akasbi, Javier David Altclas, Federico Ariel, Horacio Alberto Ariza, Chandrasekhar Atkar, Anselmo Bertetti, Meenakshi Bhattacharya, Maria Luisa Briones, Akshay Budhraja, Aaliya Burza, Adrian Camacho Ortiz, Roberto Caricchio, Marcelo Casas, Valeria Cevoli Recio, Won Suk Choi, Emilia Cohen, Angel Comulada-Rivera, Paul Cook, Dora Patricia Cornejo Juarez, Carnevali Daniel, Luiz Fernando Degrecci Relvas, Jose Guillermo Dominguez Cherit, Todd Ellerin, Dmitry Enikeev, Suzana Erico Tanni Minamoto, Elie Fiss, Motohiko Furuichi, Kleber Giovanni Luz, Jason D. Goldman, Omar Gonzalez, Ivan Gordeev, Thomas Gruenewald, Victor Augusto Hamamoto Sato, Eun Young Heo, Jung Yeon Heo, Maria Hermida, Yuji Hirai, David Hutchinson, Claudio Iastrebner, Octavian Ioachimescu, Manish Jain, Maria Patelli Juliani Souza Lima, Akram Khan, Andreas E. Kremer, Thomas Lawrie, Mark MacElwee, Farah Madhani-Lovely, Vinay Malhotra, Michel Fernando Martínez Resendez, James McKinnell, Patrick Milligan, Cesar Minelli, Miguel Angel Moran Rodriguez, Maria Leonor Parody, Priscila Paulin, Priscilla Pemu, Ana Carolina Procopio Carvalho, Massimo Puoti, Joshua Purow, Mayur Ramesh, Alvaro Rea Neto, Philip Robinson, Cristhieni Rodrigues, Gustavo Rojas Velasco, Jose Francisco Kerr Saraiva, Morton Scheinberg, Stefan Schreiber, Dario Scublinsky, Anete Sevciovic Grumach, Imad Shawa, Jesus Simon Campos, Nidhi Sofat, Christoph D. Spinner, Eduardo Sprinz, Roger Stienecker, Jose Suarez, Natsuo Tachikawa, Hasan Tahir, Brian Tiffany, Alexander Vishnevsky, Adilson Westheimer Cavalcante, Kapil Zirpe, Marconi, V, Ramanan, A, de Bono, S, Kartman, C, Krishnan, V, Liao, R, Piruzeli, M, Goldman, J, Alatorre-Alexander, J, de Cassia Pellegrini, R, Estrada, V, Som, M, Cardoso, A, Chakladar, S, Crowe, B, Reis, P, Zhang, X, Adams, D, Ely, E, Ahn, M, Akasbi, M, Altclas, J, Ariel, F, Ariza, H, Atkar, C, Bertetti, A, Bhattacharya, M, Briones, M, Budhraja, A, Burza, A, Camacho Ortiz, A, Caricchio, R, Casas, M, Cevoli Recio, V, Choi, W, Cohen, E, Comulada-Rivera, A, Cook, P, Cornejo Juarez, D, Daniel, C, Degrecci Relvas, L, Dominguez Cherit, J, Ellerin, T, Enikeev, D, Erico Tanni Minamoto, S, Fiss, E, Furuichi, M, Giovanni Luz, K, Gonzalez, O, Gordeev, I, Gruenewald, T, Hamamoto Sato, V, Heo, E, Heo, J, Hermida, M, Hirai, Y, Hutchinson, D, Iastrebner, C, Ioachimescu, O, Jain, M, Juliani Souza Lima, M, Khan, A, Kremer, A, Lawrie, T, Macelwee, M, Madhani-Lovely, F, Malhotra, V, Martinez Resendez, M, Mckinnell, J, Milligan, P, Minelli, C, Moran Rodriguez, M, Parody, M, Paulin, P, Pellegrini, R, Pemu, P, Procopio Carvalho, A, Puoti, M, Purow, J, Ramesh, M, Rea Neto, A, Robinson, P, Rodrigues, C, Rojas Velasco, G, Saraiva, J, Scheinberg, M, Schreiber, S, Scublinsky, D, Sevciovic Grumach, A, Shawa, I, Simon Campos, J, Sofat, N, Spinner, C, Sprinz, E, Stienecker, R, Suarez, J, Tachikawa, N, Tahir, H, Tiffany, B, Vishnevsky, A, Westheimer Cavalcante, A, and Zirpe, K

Subjects
Pulmonary and Respiratory Medicine, Adult, medicine.medical_specialty, Asia, medicine.medical_treatment, Population, Placebo, Antiviral Agents, Corrections, Dexamethasone, Baricitinib, Double-Blind Method, Adrenal Cortex Hormones, Internal medicine, Clinical endpoint, medicine, Humans, education, Adverse effect, Mechanical ventilation, education.field_of_study, Sulfonamides, Alanine, business.industry, SARS-CoV-2, Hazard ratio, Absolute risk reduction, COVID-19, Odds ratio, Articles, South America, Adenosine Monophosphate, COVID-19 Drug Treatment, Europe, Treatment Outcome, Purines, North America, Azetidines, Pyrazoles, business
Abstract

Summary Background Baricitinib is an oral selective Janus kinase 1/2 inhibitor with known anti-inflammatory properties. This study evaluates the efficacy and safety of baricitinib in combination with standard of care for the treatment of hospitalised adults with COVID-19. Methods In this phase 3, double-blind, randomised, placebo-controlled trial, participants were enrolled from 101 centres across 12 countries in Asia, Europe, North America, and South America. Hospitalised adults with COVID-19 receiving standard of care were randomly assigned (1:1) to receive once-daily baricitinib (4 mg) or matched placebo for up to 14 days. Standard of care included systemic corticosteroids, such as dexamethasone, and antivirals, including remdesivir. The composite primary endpoint was the proportion who progressed to high-flow oxygen, non-invasive ventilation, invasive mechanical ventilation, or death by day 28, assessed in the intention-to-treat population. All-cause mortality by day 28 was a key secondary endpoint, and all-cause mortality by day 60 was an exploratory endpoint; both were assessed in the intention-to-treat population. Safety analyses were done in the safety population defined as all randomly allocated participants who received at least one dose of study drug and who were not lost to follow-up before the first post-baseline visit. This study is registered with ClinicalTrials.gov , NCT04421027 . Findings Between June 11, 2020, and Jan 15, 2021, 1525 participants were randomly assigned to the baricitinib group (n=764) or the placebo group (n=761). 1204 (79·3%) of 1518 participants with available data were receiving systemic corticosteroids at baseline, of whom 1099 (91·3%) were on dexamethasone; 287 (18·9%) participants were receiving remdesivir. Overall, 27·8% of participants receiving baricitinib and 30·5% receiving placebo progressed to meet the primary endpoint (odds ratio 0·85 [95% CI 0·67 to 1·08], p=0·18), with an absolute risk difference of −2·7 percentage points (95% CI −7·3 to 1·9). The 28-day all-cause mortality was 8% (n=62) for baricitinib and 13% (n=100) for placebo (hazard ratio [HR] 0·57 [95% CI 0·41–0·78]; nominal p=0·0018), a 38·2% relative reduction in mortality; one additional death was prevented per 20 baricitinib-treated participants. The 60-day all-cause mortality was 10% (n=79) for baricitinib and 15% (n=116) for placebo (HR 0·62 [95% CI 0·47–0·83]; p=0·0050). The frequencies of serious adverse events (110 [15%] of 750 in the baricitinib group vs 135 [18%] of 752 in the placebo group), serious infections (64 [9%] vs 74 [10%]), and venous thromboembolic events (20 [3%] vs 19 [3%]) were similar between the two groups. Interpretation Although there was no significant reduction in the frequency of disease progression overall, treatment with baricitinib in addition to standard of care (including dexamethasone) had a similar safety profile to that of standard of care alone, and was associated with reduced mortality in hospitalised adults with COVID-19. Funding Eli Lilly and Company. Translations For the French, Japanese, Portuguese, Russian and Spanish translations of the abstract see Supplementary Materials section.

Published
2021

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