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Li Q, Chen Y, Zhang W, Li C, Tang D, Hua W, Hou F, Chen Z, Liu Y, Tian Y, Sun K, Xu X, Zeng Y, Xia F, Lu J, Wang Z. Mpox virus Clade IIb infected Cynomolgus macaques via mimic natural infection routes closely resembled human mpox infection. Emerg Microbes Infect 2024; 13:2332669. [PMID: 38494777 PMCID: PMC10984234 DOI: 10.1080/22221751.2024.2332669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 03/15/2024] [Indexed: 03/19/2024]
Abstract
Generating an infectious non-human primate (NHP) model using a prevalent monkeypox virus (MPXV) strain has emerged as a crucial strategy for assessing the efficacy of vaccines and antiviral drugs against human MPXV infection. Here, we established an animal model by infecting cynomolgus macaques with the prevalent MPXV strain, WIBP-MPXV-001, and simulating its natural routes of infection. A comprehensive analysis and evaluation were conducted on three animals, including monitoring clinical symptoms, collecting hematology data, measuring viral loads, evaluating cellular and humoral immune responses, and examining histopathology. Our findings revealed that initial skin lesions appeared at the inoculation sites and subsequently spread to the limbs and back, and all infected animals exhibited bilateral inguinal lymphadenopathy, eventually leading to a self-limiting disease course. Viral DNA was detected in post-infection blood, nasal, throat, rectal and blister fluid swabs. These observations indicate that the NHP model accurately reflects critical clinical features observed in human MPXV infection. Notably, the animals displayed clinical symptoms and disease progression similar to those of humans, rather than a lethal outcome as observed in previous studies. Historically, MPXV was utilized as a surrogate model for smallpox. However, our study contributes to a better understanding of the dynamics of current MPXV infections while providing a potential infectious NHP model for further evaluation of vaccines and antiviral drugs against mpox infection. Furthermore, the challenge model closely mimics the primary natural routes of transmission for human MPXV infections. This approach enhances our understanding of the precise mechanisms underlying the interhuman transmission of MPXV.
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Affiliation(s)
- Qingni Li
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Yunfeng Chen
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Wenjing Zhang
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Chunyang Li
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Ding Tang
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Wanlu Hua
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Fan Hou
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Zhuo Chen
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Yuanlang Liu
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Yi Tian
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Kaili Sun
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Xiuli Xu
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Yan Zeng
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Fei Xia
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Jia Lu
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
| | - Zejun Wang
- Biosafety Level 3 Laboratory, Wuhan Institute of Biological Products Co., Ltd., Wuhan, People’s Republic of China
- National Engineering Technology Research Center for Combined Vaccines, Wuhan, People’s Republic of China
- National Key Laboratory for Novel Vaccines Research and Development of Emerging Infectious Diseases, Wuhan, People’s Republic of China
- Hubei Provincial Vaccine Technology Innovation Center, Wuhan, People’s Republic of China
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Nguyen CT, Nakayama M, Ishigaki H, Kitagawa Y, Kakino A, Ohno M, Shingai M, Suzuki Y, Sawamura T, Kida H, Itoh Y. Increased expression of CD38 on endothelial cells in SARS-CoV-2 infection in cynomolgus macaques. Virology 2024; 594:110052. [PMID: 38507920 DOI: 10.1016/j.virol.2024.110052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 02/21/2024] [Accepted: 03/06/2024] [Indexed: 03/22/2024]
Abstract
SARS-CoV-2 infection causes activation of endothelial cells (ECs), leading to dysmorphology and dysfunction. To study the pathogenesis of endotheliopathy, the activation of ECs in lungs of cynomolgus macaques after SARS-CoV-2 infection and changes in nicotinamide adenine dinucleotide (NAD) metabolism in ECs were investigated, with a focus on the CD38 molecule, which degrades NAD in inflammatory responses after SARS-CoV-2 infection. Activation of ECs was seen from day 3 after SARS-CoV-2 infection in macaques, with increases of intravascular fibrin and NAD metabolism-associated enzymes including CD38. In vitro, upregulation of CD38 mRNA in human ECs was detected after interleukin 6 (IL-6) trans-signaling induction, which was increased in the infection. In the presence of IL-6 trans-signaling stimulation, however, CD38 mRNA silencing induced significant IL-6 mRNA upregulation in ECs and promoted EC apoptosis after stimulation. These results suggest that upregulation of CD38 in patients with COVID-19 has a protective role against IL-6 trans-signaling stimulation induced by SARS-CoV-2 infection.
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Affiliation(s)
- Cong Thanh Nguyen
- Division of Pathogenesis and Disease Regulation, Department of Pathology, Shiga University of Medical Science, Otsu, Japan
| | - Misako Nakayama
- Division of Pathogenesis and Disease Regulation, Department of Pathology, Shiga University of Medical Science, Otsu, Japan
| | - Hirohito Ishigaki
- Division of Pathogenesis and Disease Regulation, Department of Pathology, Shiga University of Medical Science, Otsu, Japan
| | - Yoshinori Kitagawa
- Division of Microbiology and Infectious Diseases, Department of Pathology, Shiga University of Medical Science, Otsu, Japan
| | - Akemi Kakino
- Department of Molecular Pathophysiology, School of Medicine, Shinshu University, Matsumoto, Japan
| | - Marumi Ohno
- International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan; One Health Research Center, Hokkaido University, Sapporo, Japan
| | - Masashi Shingai
- International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Yasuhiko Suzuki
- International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan; Institute for Vaccine Research and Development, Hokkaido University, Sapporo, Japan
| | - Tatsuya Sawamura
- Department of Molecular Pathophysiology, School of Medicine, Shinshu University, Matsumoto, Japan
| | - Hiroshi Kida
- International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Yasushi Itoh
- Division of Pathogenesis and Disease Regulation, Department of Pathology, Shiga University of Medical Science, Otsu, Japan; Central Research Laboratory, Shiga University of Medical Science, Otsu, Japan.
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To A, Wong TAS, Ball AH, Lieberman MM, Yalley-Ogunro J, Cabus M, Nezami S, Paz F, Elyard HA, Borisevich V, Agans KN, Deer DJ, Woolsey C, Cross RW, Geisbert TW, Donini O, Lehrer AT. Thermostable bivalent filovirus vaccine protects against severe and lethal Sudan ebolavirus and marburgvirus infection. Vaccine 2024; 42:598-607. [PMID: 38158300 PMCID: PMC10872277 DOI: 10.1016/j.vaccine.2023.12.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 01/03/2024]
Abstract
Although two vaccines for Zaire ebolavirus (EBOV) have been licensed and deployed successfully to combat recurring outbreaks of Ebolavirus Disease in West Africa, there are no vaccines for two other highly pathogenic members of the Filoviridae, Sudan ebolavirus (SUDV) and Marburg marburgvirus (MARV). The results described herein document the immunogenicity and protective efficacy in cynomolgus macaques of a single-vial, thermostabilized (lyophilized) monovalent (SUDV) and bivalent (SUDV & MARV) protein vaccines consisting of recombinant glycoproteins (GP) formulated with a clinical-grade oil-in-water nanoemulsion adjuvant (CoVaccine HT™). Lyophilized formulations of the vaccines were reconstituted with Water for Injection and used to immunize groups of cynomolgus macaques before challenge with a lethal dose of a human SUDV or MARV isolate. Sera collected after each of the three immunizations showed near maximal GP-binding IgG concentrations starting as early as the second dose. Most importantly, the vaccine candidates (monovalent or bivalent) provided 100% protection against severe and lethal filovirus disease after either SUDV or MARV infection. Although mild, subclinical infection was observed in a few macaques, all vaccinated animals remained healthy and survived the filovirus challenge. These results demonstrate the value that thermostabilized protein vaccines could provide for addressing an important gap in preparedness for future filovirus outbreaks.
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Affiliation(s)
- Albert To
- Department of Tropical Medicine, Medical Microbiology, and Pharmacology, John A. Burns School of Medicine, University of Hawai'i at Mānoa, Honolulu, HI 96813, USA
| | - Teri Ann S Wong
- Department of Tropical Medicine, Medical Microbiology, and Pharmacology, John A. Burns School of Medicine, University of Hawai'i at Mānoa, Honolulu, HI 96813, USA
| | - Aquena H Ball
- Department of Tropical Medicine, Medical Microbiology, and Pharmacology, John A. Burns School of Medicine, University of Hawai'i at Mānoa, Honolulu, HI 96813, USA
| | - Michael M Lieberman
- Department of Tropical Medicine, Medical Microbiology, and Pharmacology, John A. Burns School of Medicine, University of Hawai'i at Mānoa, Honolulu, HI 96813, USA
| | | | | | | | | | | | - Viktoriya Borisevich
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77550, USA; Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Krystle N Agans
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77550, USA; Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Daniel J Deer
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77550, USA; Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Courtney Woolsey
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77550, USA; Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Robert W Cross
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77550, USA; Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Thomas W Geisbert
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77550, USA; Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | | | - Axel T Lehrer
- Department of Tropical Medicine, Medical Microbiology, and Pharmacology, John A. Burns School of Medicine, University of Hawai'i at Mānoa, Honolulu, HI 96813, USA.
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4
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Hashimoto M, Aoe S, Kawazu Y, Seki NM, Hashimoto K, Yoshihara K, Homma T, Sonoyama T, Omoto S. Homologous and heterologous booster vaccinations of S-268019-b, a recombinant S protein-based vaccine with a squalene-based adjuvant, enhance neutralization breadth against SARS-CoV-2 Omicron subvariants in cynomolgus macaques. Vaccine 2022; 40:7520-7525. [PMID: 36372670 PMCID: PMC9640394 DOI: 10.1016/j.vaccine.2022.10.092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/20/2022] [Accepted: 10/26/2022] [Indexed: 11/09/2022]
Abstract
SARS-CoV-2 Omicron subvariants such as BA.2.12.1, BA.4 and BA.5 have been spreading rapidly and become dominant worldwide. Here we report the homologous or heterologous booster effects of S-268019-b, a recombinant spike protein vaccine with the squalene-based adjuvant A-910823 in cynomolgus macaques. In macaques which had been primed with S-268019-b or mRNA vaccines, boosting with S-268019-b enhanced neutralizing antibodies (NAb) against ancestral SARS-CoV-2. Since boosting with the antigen without adjuvant did not efficiently restore NAb titers, adjuvant A-910823 was essential for the booster effect. Importantly, boosting with S-268019-b enhanced NAb against all of the Omicron subvariants we tested, including BA.2.12.1, BA.4 and BA.5, in comparison to two vaccine doses. Additionally, expansion of Omicron-specific B cells was confirmed after boosting with S-268019-b. These results indicate that a booster dose of S-268019-b with the adjuvant enhances the neutralization breadth.
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Affiliation(s)
- Masayuki Hashimoto
- Shionogi & Co., Ltd., Biopharmaceutical Research Division, 1-1, Futaba-cho 3-chome, Toyonaka, Osaka 561-0825, Japan.
| | - Shinpei Aoe
- Shionogi TechnoAdvance Research Co., Ltd., 1-1, Futaba-cho 3-chome, Toyonaka, Osaka 561-0825, Japan.
| | - Yusuke Kawazu
- Shionogi TechnoAdvance Research Co., Ltd., 1-1, Futaba-cho 3-chome, Toyonaka, Osaka 561-0825, Japan.
| | - Naomi M Seki
- Shionogi & Co., Ltd., Biopharmaceutical Research Division, 1-1, Futaba-cho 3-chome, Toyonaka, Osaka 561-0825, Japan.
| | - Kumi Hashimoto
- Shionogi & Co., Ltd., Biopharmaceutical Research Division, 1-1, Futaba-cho 3-chome, Toyonaka, Osaka 561-0825, Japan.
| | - Ken Yoshihara
- Shionogi & Co., Ltd., Biopharmaceutical Research Division, 1-1, Futaba-cho 3-chome, Toyonaka, Osaka 561-0825, Japan.
| | - Tomoyuki Homma
- Shionogi & Co., Ltd., Biopharmaceutical Research Division, 1-1, Futaba-cho 3-chome, Toyonaka, Osaka 561-0825, Japan.
| | - Takuhiro Sonoyama
- Shionogi & Co., Ltd., Drug Development and Regulatory Science Division, 8F, Nissay Yodoyabashi East Bldg., 3-3-13, Imabashi, Chuo-ku, Osaka 541-0042, Japan.
| | - Shinya Omoto
- Shionogi & Co., Ltd., Biopharmaceutical Research Division, 1-1, Futaba-cho 3-chome, Toyonaka, Osaka 561-0825, Japan.
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5
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Uno Y, Uehara S, Yamazaki H. Polymorphic cytochromes P450 in non-human primates. Adv Pharmacol 2022; 95:329-364. [PMID: 35953160 DOI: 10.1016/bs.apha.2022.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Cynomolgus macaques (Macaca fascicularis, an Old World monkey) are widely used in drug development because of their genetic and physiological similarities to humans, and this trend has continued with the use of common marmosets (Callithrix jacchus, a New World monkey). Information on the major drug-metabolizing cytochrome P450 (CYP, P450) enzymes of these primate species indicates that multiple forms of their P450 enzymes have generally similar substrate selectivities to those of human P450 enzymes; however, some differences in isoform, activity, and substrate specificity account for limited species differences in drug oxidative metabolism. This review provides information on the P450 enzymes of cynomolgus macaques and marmosets, including cDNA, tissue expression, substrate specificity, and genetic variants, along with age differences and induction. Typical examples of important P450s to be considered in drug metabolism studies include cynomolgus CYP2C19, which is expressed abundantly in liver and metabolizes numerous drugs. Moreover, genetic variants of cynomolgus CYP2C19 affect the individual pharmacokinetic data of drugs such as R-warfarin. These findings provide a foundation for understanding each P450 enzyme and the individual pharmacokinetic and toxicological results in cynomolgus macaques and marmosets as preclinical models. In addition, the effects of induction on some drug clearances mediated by P450 enzymes are also described. In summary, this review describes genetic and acquired individual differences in cynomolgus and marmoset P450 enzymes involved in drug oxidation that may be associated with pharmacological and/or toxicological effects.
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Affiliation(s)
- Yasuhiro Uno
- Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan.
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Kalnin KV, Plitnik T, Kishko M, Huang D, Raillard A, Piolat J, Anosova NG, Tibbitts T, DiNapoli J, Karve S, Goldman R, Gopani H, Dias A, Tran K, Zacharia M, Gu X, Boeglin L, Abysalh J, Vargas J, Beaulieu A, Shah M, Jeannotte T, Gillis K, Chivukula S, Swearingen R, Landolfi V, Fu TM, DeRosa F, Casimiro D. Pan-SARS neutralizing responses after third boost vaccination in non-human primate immunogenicity model. Vaccine 2022; 40:1289-1298. [PMID: 35101265 PMCID: PMC8801978 DOI: 10.1016/j.vaccine.2022.01.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/08/2021] [Accepted: 01/14/2022] [Indexed: 12/11/2022]
Abstract
The emergence of SARS-CoV-2 variants, especially Beta and Delta, has raised concerns about the reduced protection from previous infection or vaccination based on the original Wuhan-Hu-1 (D614) virus. To identify promising regimens for inducing neutralizing titers towards new variants, we evaluated monovalent and bivalent mRNA vaccines either as primary vaccination or as a booster in nonhuman primates (NHPs). Two mRNA vaccines, D614-based MRT5500 and Beta-based MRT5500β, tested in sequential regimens or as a bivalent combination in naïve NHPs produced modest neutralizing titers to heterologous variants. However, when mRNA vaccines were administered as a booster to pre-immune NHPs, we observed a robust increase in neutralizing titers with expanded breadth towards all tested variants, and notably SARS-CoV-1. The breadth of the neutralizing response was independent of vaccine sequence or modality, as we further showed either MRT5500 or recombinant subunit Spike protein (with adjuvant) can serve as boosters to induce broadly neutralizing antibodies in the NHPs primed with MRT5500. The data support the notion that a third vaccination is key to boosting existing titers and improving the breadth of antibodies to address variants of concern, including those with an E484K mutation in the Receptor Binding Domain (RBD) (Beta, Gamma).
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Affiliation(s)
- Kirill V Kalnin
- Emergent BioSolutions, 3985-A Sorrento Valley Blvd, San Diego, CA 92121, United States
| | - Timothy Plitnik
- Yoh Services LLC, 38 Sidney Street, Cambridge, MA 02139, United States
| | - Michael Kishko
- Sanofi Pasteur, 38 Sidney Street, Cambridge, MA 02139, United States
| | - Dean Huang
- Sanofi Pasteur, 38 Sidney Street, Cambridge, MA 02139, United States
| | - Alice Raillard
- Sanofi Pasteur, 1541 AV Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Julie Piolat
- Sanofi Pasteur, 1541 AV Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Natalie G Anosova
- Sanofi Pasteur, 38 Sidney Street, Cambridge, MA 02139, United States.
| | - Timothy Tibbitts
- Sanofi Pasteur, 38 Sidney Street, Cambridge, MA 02139, United States
| | - Joshua DiNapoli
- Sanofi Pasteur, 38 Sidney Street, Cambridge, MA 02139, United States
| | - Shrirang Karve
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Rebecca Goldman
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Hardip Gopani
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Anusha Dias
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Khang Tran
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Minnie Zacharia
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Xiaobo Gu
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Lianne Boeglin
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Jonathan Abysalh
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Jorel Vargas
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Angela Beaulieu
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Monic Shah
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Travis Jeannotte
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Kimberly Gillis
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Sudha Chivukula
- Sanofi Pasteur, 38 Sidney Street, Cambridge, MA 02139, United States
| | - Ron Swearingen
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | | | - Tong-Ming Fu
- UT Health Science Center at Houston, 7000 Fannin St #1200, Houston, TX 77030, United States
| | - Frank DeRosa
- Translate Bio, 29 Hartwell Ave, Lexington, MA 02421, United States
| | - Danilo Casimiro
- Sanofi Pasteur, 1541 AV Marcel Mérieux, 69280 Marcy l'Etoile, France
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Wu H, Zhang X, Zhang B, Adkins K. Genetic variation in the Mauritian cynomolgus macaque population reflects variation in the human population. Gene 2021; 787:145648. [PMID: 33848572 DOI: 10.1016/j.gene.2021.145648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 03/23/2021] [Accepted: 04/07/2021] [Indexed: 11/21/2022]
Abstract
The cynomolgus macaque is an important species for preclinical research, however the extent of genetic variation in this population and its similarity to the human population is not well understood. Exome sequencing was conducted for 101 cynomolgus macaques to characterize genetic variation. The variant distribution frequency was 7.81 variants per kilobase across the sequenced regions, with a total of 2,770,009 single nucleotide variants identified from 2,996,041 loci. A large portion (85.6%) had minor allele frequencies greater than 5%. Enriched pathways for genes with high genetic diversity (≥10 variants per kilobase) were those involving signaling peptides and immune response. Compared to human, the variant distribution frequency and nucleotide diversity in the macaque exome was approximately 4 times greater; however the ratio of non-synonymous to synonymous variants was similar (0.735 and 0.831, respectively). Understanding genetic variability in cynomolgus macaques will enable better interpretation and human translation of phenotypic variability in this species.
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Sawaswong V, Chanchaem P, Khamwut A, Praianantathavorn K, Kemthong T, Malaivijitnond S, Payungporn S. Oral-fecal mycobiome in wild and captive cynomolgus macaques (Macaca fascicularis). Fungal Genet Biol 2020; 144:103468. [PMID: 32980453 DOI: 10.1016/j.fgb.2020.103468] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/10/2020] [Accepted: 09/08/2020] [Indexed: 02/06/2023]
Abstract
Cynomolgus macaque (Macaca fascicularis) is currently a common animal model for biomedical research. The National Primate Research Center of Thailand, Chulalongkorn University (NPRCT-CU) translocated wild-borne macaques to reared colony for research purposes. At present, no studies focus on fungal microbiome (Mycobiome) of this macaque. The functional roles of mycobiome and fungal pathogens have not been elucidated. Thus, this study aimed to investigate and compare oral and fecal mycobiome between wild and captive macaques by using high-throughput sequencing on internal transcribed spacer 2 (ITS2) rDNA. The results showed that the mycobiome of wild macaque has greater alpha diversity. The fecal mycobiome has more limited alpha diversity than those in oral cavity. The community is mainly dominated by saprophytic yeast in Kasachstania genus which is related to aiding metabolic function in gut. The oral microbiome of most captive macaques presented the Cutaneotrichosporon suggesting the fungal transmission through skin-oral contact within the colony. The potential pathogens that would cause harmful transmission in reared colonies were not found in either group of macaques but the pathogen prevention and animal care is still important to be concerned. In conclusion, the results of gut mycobiome analysis in Thai cynomolgus macaques provide us with the basic information of oral and fecal fungi and for monitoring macaque's health status for animal care of research use.
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Affiliation(s)
- Vorthon Sawaswong
- Program in Bioinformatics and Computational Biology, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand; Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Prangwalai Chanchaem
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; Research Unit of Systems Microbiology, Chulalongkorn University, Bangkok 10330, Thailand
| | - Ariya Khamwut
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | | | - Taratorn Kemthong
- National Primate Research Center of Thailand, Chulalongkorn University, Saraburi 18110, Thailand
| | - Suchinda Malaivijitnond
- National Primate Research Center of Thailand, Chulalongkorn University, Saraburi 18110, Thailand; Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Sunchai Payungporn
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; Research Unit of Systems Microbiology, Chulalongkorn University, Bangkok 10330, Thailand.
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9
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Peng J, Zhong L, Ma L, Jin J, Zheng Y, Jin C. Comparison of vascular parameters between normal cynomolgus macaques and healthy humans by optical coherence tomography angiography. BMC Ophthalmol 2019; 19:204. [PMID: 31601186 PMCID: PMC6788001 DOI: 10.1186/s12886-019-1207-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 08/28/2019] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND The metabolic activity of retina is higher than other human tissues and is crucial to the vision. Cynomolgus macaques is widely used in ophthalmic disease research. The evaluation and comparison of macular and optic disc vascular circulation parameters between normal adult cynomolgus macaques and healthy adult humans using OCT-A can promote better use of nonhuman primate models in studies of ophthalmic vascular disease. METHODS Twelve normal adult cynomolgus macaques with a mean age of 4.91 ± 0.43 years were studied for data collection. The macula of 28 adult healthy humans (14 males and 14 females), with a mean age of 25.11 ± 6.21 years and the optic discs of 9 adult healthy humans (4 males and 5 females) with a mean age of 28.56 ± 6.78 years were measured. The vessel density (VD) was measured using an RTVue XR with AngioVue. The scan sizes of the macular and optic discs were 3 × 3 mm and 4.5 × 4.5 mm, respectively. RESULTS OCT-A can image the superficial and deep capillary plexuses and radial peripapillary capillary network. In RPC layer of the optic disc, the VD in the nasal quadrant was lower than the VD in the inferior temporal quadrant. Similarities and significant differences in VD between healthy humans and cynomolgus macaques were obtained using OCT-A. CONCLUSIONS This study provides normal vascular parameters for adult cynomolgus macaques using OCT-A to help establish an optical parameter database for cynomolgus macaques and compare VD between healthy humans and cynomolgus macaques to promote choroid-retinopathy research. TRIAL REGISTRATION Current Controlled Trials NCT03692169 , retrospectively registered on 26 sept 2018.
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Affiliation(s)
- Jingyi Peng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Liuxueying Zhong
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Li Ma
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Jiayi Jin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Yongxin Zheng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China.
| | - Chenjin Jin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China.
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10
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Ragonnaud E, Schroedel S, Mariya S, Iskandriati D, Pamungkas J, Fougeroux C, Daradoumis J, Thomsen AR, Neukirch L, Ruzsics Z, Salomon M, Thirion C, Holst PJ. Replication deficient human adenovirus vector serotype 19a/64: Immunogenicity in mice and female cynomolgus macaques. Vaccine 2018; 36:6212-22. [PMID: 30190120 DOI: 10.1016/j.vaccine.2018.07.075] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 07/19/2018] [Accepted: 07/30/2018] [Indexed: 01/03/2023]
Abstract
The human adenovirus type 19a/64 (hAd19a) is a rare serotype in the human population that transduces human dendritic cells (DCs) and human muscle cells more efficiently than the well-characterized human adenovirus type 5 (hAd5). To further characterize the potential of this vector as a vaccine we designed replication deficient hAd19a, hAd5 and MVA vectors expressing a papillomavirus (PV) antigen fused to the human MHC class II associated invariant chain T cell adjuvant (hIi) and investigated their immunogenicity in vivo in mice and cynomolgus macaques. We initially showed that the hIi encoded in the hAd5 enhanced PV specific CD8+ T cell responses in mice. The T cell responses induced after hAd19a vaccination was similar to those induced by hAd5 vaccination. The hAd19a induced responses were not reduced in presence of preexisting Ad5 immunity in mice. In macaques both vaccines were equally potent at inducing CD8+ T cells after MVA boost, while the level of CD4+ T cell responses were found to be broader in hAd19a primed animals. These data demonstrate the potential of hAd19a as an alternative vector to hAd5 to elicit potent T cell responses to PV.
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11
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Cui YF, Wang FJ, Yu L, Ye HH, Yang GB. Metagenomic comparison of the rectal microbiota between rhesus macaques ( Macaca mulatta) and cynomolgus macaques ( Macaca fascicularis). Zool Res 2018; 40:89-93. [PMID: 30127329 PMCID: PMC6378564 DOI: 10.24272/j.issn.2095-8137.2018.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Rhesus macaques (Macaca mulatta) and cynomolgus macaques (Macaca fascicularis) are frequently used in establishing animal models for human diseases. To determine the differences in gut microbiota between these species, rectal swabs from 20 rhesus macaques and 21 cynomolgus macaques were collected, and the microbial composition was examined by deep sequencing of the 16S rRNA gene. We found that the rectal microbiota of cynomolgus macaques exhibited significantly higher alpha diversity than that of rhesus macaques, although the observed number of operational taxonomic units (OTUs) was almost the same. The dominant taxa at both the phylum and genus levels were similar between the two species, although the relative abundances of these dominant taxa were significantly different between them. Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) showed significant differences in the functional components between the microbiota of the two species, in particular the lipopolysaccharide (LPS) synthesis proteins. The above data indicated significant differences in microbial composition and function between these two closely related macaque species, which should be taken into consideration in the future selection of these animals for disease models.
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Affiliation(s)
- Yan-Fang Cui
- National Center for AIDS/STD Control and Prevention, China-CDC, Beijing 102206, China
| | - Feng-Jie Wang
- National Center for AIDS/STD Control and Prevention, China-CDC, Beijing 102206, China
| | - Lei Yu
- National Center for AIDS/STD Control and Prevention, China-CDC, Beijing 102206, China
| | - Hua-Hu Ye
- Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing 100071, China
| | - Gui-Bo Yang
- National Center for AIDS/STD Control and Prevention, China-CDC, Beijing 102206, China; E-mail:
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12
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Grandin C, Hourani ML, Janin YL, Dauzonne D, Munier-Lehmann H, Paturet A, Taborik F, Vabret A, Contamin H, Tangy F, Vidalain PO. Respiratory syncytial virus infection in macaques is not suppressed by intranasal sprays of pyrimidine biosynthesis inhibitors. Antiviral Res 2015; 125:58-62. [PMID: 26593978 DOI: 10.1016/j.antiviral.2015.11.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 10/16/2015] [Accepted: 11/14/2015] [Indexed: 12/19/2022]
Abstract
There is imperious need for efficient therapies against ubiquitous and life-threatening respiratory viruses, foremost among them being the human respiratory syncytial virus (hRSV). Several research groups who performed functional screens for broad-spectrum antivirals identified compounds targeting the de novo pyrimidine biosynthesis pathway. Despite their strong antiviral activity in vitro, whether such antimetabolites are effective in vivo remains highly controversial. Here, we evaluated two potent pyrimidine biosynthesis inhibitors developed in our laboratory, IPPA17-A04 and GAC50, in a model of mild hRSV-infection in cynomolgus macaques. In this model, hRSV replication is restricted to the epithelium of the upper respiratory tract, and is compatible with a topical treatment by intranasal sprays. The local administration of palivizumab, a neutralizing anti-hRSV antibody used in clinics, significantly reduced virus replication. In contrast, pyrimidine biosynthesis inhibitors did not show any inhibitory effect on hRSV growth when delivered topically as experimented in our model. Our results should help to better define the potential applications of this class of antimetabolites in the treatment of viral infections.
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Affiliation(s)
- Clément Grandin
- Cynbiose SA, Marcy-l'Etoile, France; Institut Pasteur, Unité de Génomique Virale et Vaccination, Paris, France; CNRS, UMR3569, Paris, France
| | - Marianne-Lucas Hourani
- Institut Pasteur, Unité de Génomique Virale et Vaccination, Paris, France; CNRS, UMR3569, Paris, France
| | - Yves L Janin
- Institut Pasteur, Unité de Chimie et Biocatalyse, Paris, France; CNRS, UMR3523, Paris, France
| | - Daniel Dauzonne
- Institut Curie, Centre de Recherche, Paris, France; CNRS, UMR3666, Paris, France; INSERM, U1143, Paris, France
| | - Hélène Munier-Lehmann
- Institut Pasteur, Unité de Chimie et Biocatalyse, Paris, France; CNRS, UMR3523, Paris, France
| | | | | | - Astrid Vabret
- Université de Caen-Basse-Normandie, EA 4655-U2RM, Laboratoire de Virologie, CHU de Caen, France
| | | | - Frédéric Tangy
- Institut Pasteur, Unité de Génomique Virale et Vaccination, Paris, France; CNRS, UMR3569, Paris, France.
| | - Pierre-Olivier Vidalain
- Institut Pasteur, Unité de Génomique Virale et Vaccination, Paris, France; CNRS, UMR3569, Paris, France.
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13
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Westbrook CJ, Karl JA, Wiseman RW, Mate S, Koroleva G, Garcia K, Sanchez-Lockhart M, O'Connor DH, Palacios G. No assembly required: Full-length MHC class I allele discovery by PacBio circular consensus sequencing. Hum Immunol 2015; 76:891-6. [PMID: 26028281 DOI: 10.1016/j.humimm.2015.03.022] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 03/18/2015] [Indexed: 11/17/2022]
Abstract
Single-molecule real-time (SMRT) sequencing technology with the Pacific Biosciences (PacBio) RS II platform offers the potential to obtain full-length coding regions (∼1100-bp) from MHC class I cDNAs. Despite the relatively high error rate associated with SMRT technology, high quality sequences can be obtained by circular consensus sequencing (CCS) due to the random nature of the error profile. In the present study we first validated the ability of SMRT-CCS to accurately identify class I transcripts in Mauritian-origin cynomolgus macaques (Macaca fascicularis) that have been characterized previously by cloning and Sanger-based sequencing as well as pyrosequencing approaches. We then applied this SMRT-CCS method to characterize 60 novel full-length class I transcript sequences expressed by a cohort of cynomolgus macaques from China. The SMRT-CCS method described here provides a straightforward protocol for characterization of unfragmented single-molecule cDNA transcripts that will potentially revolutionize MHC class I allele discovery in nonhuman primates and other species.
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Affiliation(s)
- Catherine J Westbrook
- U.S. Medical Research Institute of Infectious Diseases, 1425 Porter Street, Fort Detrick, MD 21702, United States
| | - Julie A Karl
- Wisconsin National Primate Research Center, 555 Science Drive, University of Wisconsin-Madison, Madison, WI 53711, United States
| | - Roger W Wiseman
- Wisconsin National Primate Research Center, 555 Science Drive, University of Wisconsin-Madison, Madison, WI 53711, United States
| | - Suzanne Mate
- U.S. Medical Research Institute of Infectious Diseases, 1425 Porter Street, Fort Detrick, MD 21702, United States
| | - Galina Koroleva
- U.S. Medical Research Institute of Infectious Diseases, 1425 Porter Street, Fort Detrick, MD 21702, United States
| | - Karla Garcia
- U.S. Medical Research Institute of Infectious Diseases, 1425 Porter Street, Fort Detrick, MD 21702, United States
| | - Mariano Sanchez-Lockhart
- U.S. Medical Research Institute of Infectious Diseases, 1425 Porter Street, Fort Detrick, MD 21702, United States.
| | - David H O'Connor
- Wisconsin National Primate Research Center, 555 Science Drive, University of Wisconsin-Madison, Madison, WI 53711, United States; Department of Pathology and Laboratory Medicine, 1685 Highland Ave., University of Wisconsin-Madison, Madison, WI 53705, United States
| | - Gustavo Palacios
- U.S. Medical Research Institute of Infectious Diseases, 1425 Porter Street, Fort Detrick, MD 21702, United States
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14
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Guo H, Zhang H, Lu L, Ezzelarab MB, Thomson AW. Generation, cryopreservation, function and in vivo persistence of ex vivo expanded cynomolgus monkey regulatory T cells. Cell Immunol 2015; 295:19-28. [PMID: 25732601 DOI: 10.1016/j.cellimm.2015.02.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 02/05/2015] [Accepted: 02/06/2015] [Indexed: 12/16/2022]
Abstract
We expanded flow-sorted Foxp3(+) cynomolgus monkey regulatory T cells (Treg) >1000-fold after three rounds of stimulation with anti-CD3 mAb-loaded artificial antigen-presenting cells, rapamycin (first round only) and IL-2. The expanded Treg maintained their expression of Treg signature markers, CD25, CD27, CD39, Foxp3, Helios, and CTLA-4, as well as CXCR3, which plays an important role in T cell migration to sites of inflammation. In contrast to expanded effector T cells (Teff), expanded Treg produced minimal IFN-γ and IL-17 and no IL-2 and potently suppressed Teff proliferation. Following cryopreservation, thawed Treg were less viable than their freshly-expanded counterparts, although no significant changes in phenotype or suppressive ability were observed. Additional rounds of stimulation/expansion restored maximal viability. Furthermore, adoptively-transferred autologous Treg expanded from cryopreserved second round stocks and labeled with CFSE or VPD450 were detected in blood and secondary lymphoid tissues of normal or immunosuppressed recipients at least two months after their systemic infusion.
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15
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Feng Y, Zhao Q, Chen W, Wang Y, Crowder K, Dimitrov DS. A new bispecific antibody targeting non-overlapping epitopes on IGF2: design, in vitro characterization and pharmacokinetics in macaques. Exp Mol Pathol 2014; 97:359-67. [PMID: 25220345 DOI: 10.1016/j.yexmp.2014.09.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
Abstract
The insulin-like growth factor 2 (IGF2) is an important target for cancer therapy. We have previously proposed an approach for fast and irreversible removal of IGF2 from the circulation by using monoclonal antibodies (mAbs) that bind to two or more non-overlapping epitopes on the same molecule. We provided initial evidence for the formation of oligomeric antibody-ligand complexes that can bind to cells expressing Fc gamma receptors (FcγRs) with high avidity using an antibody domain with relatively low affinity as one of the anti-IGF2 mAbs. Recently, we identified a mAb, m708.5, in a scFv format which binds to both IGF2 and IGF1 with very high (pM) affinity. Interestingly, and rather surprisingly, this mAb did not compete with our other high affinity mAb, m610.27, for binding to IGF2. Therefore, we generated a new bispecific mAb, m67, by combining m708.5 and m610.27. As expected m67 potently inhibited binding of IGF2 to cells expressing the IGF1R and its phosphorylation, and resulted in formation of multimolecular complexes when incubated with IGF2 and bound with high avidity to cells expressing FcγRII; the complexes were internalized in a macrophage-like cell line. However, although m67 exhibited a reasonably long half-life (6.4 ± 0.6 days) in cynomolgus macaques and high stability in serum, its administration to three animals did not result in any measurable decrease in the IGF2 concentration likely due to the complexity of the IGF2 interactions in the blood and the relatively low (2mg/kg) dose of the mAb leading to a relatively low maximal blood concentration of 120nM. In spite of the lack of effect on the IGF2 concentration in this particular experimental setup, m67 exhibited good drugability properties and could be highly effective in other animal models and in humans. Studies with animal models of cancer are ongoing to evaluate the potential of m67 as a new candidate mAb-based therapeutic.
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Affiliation(s)
- Yang Feng
- Protein Interactions Group, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States.
| | - Qi Zhao
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Guangdong 518000, China
| | - Weizao Chen
- Protein Interactions Group, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States
| | - Yanping Wang
- Protein Interactions Group, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States; Geneva Foundation, 917 Pacific Ave, Suite 600, Tacoma, WA 98402, United States
| | - Karalyne Crowder
- SNBL USA, 6605 Merrill Creek Parkway, Everett, WA 98203, United States
| | - Dimiter S Dimitrov
- Protein Interactions Group, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States
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Liu P, Bu QN, Wang L, Han J, Du RJ, Lei YX, Ouyang YQ, Li J, Zhu YH, Lu FM, Zhuang H. Transmission of hepatitis E virus from rabbits to cynomolgus macaques. Emerg Infect Dis 2013; 19:559-65. [PMID: 23628346 PMCID: PMC3647409 DOI: 10.3201/eid1904.120827] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The recent discovery of hepatitis E virus (HEV) strains in rabbits in the People’s Republic of China and the United States revealed that rabbits are another noteworthy reservoir of HEV. However, whether HEV from rabbits can infect humans is unclear. To study the zoonotic potential for and pathogenesis of rabbit HEV, we infected 2 cynomolgus macaques and 2 rabbits with an HEV strain from rabbits in China. Typical hepatitis developed in both monkeys; they exhibited elevated liver enzymes, viremia, virus shedding in fecal specimens, and seroconversion. Comparison of the complete genome sequence of HEV passed in the macaques with that of the inoculum showed 99.8% nucleotide identity. Rabbit HEV RNA (positive- and negative-stranded) was detectable in various tissues from the experimentally infected rabbits, indicating that extrahepatic replication may be common. Thus, HEV is transmissible from rabbits to cynomolgus macaques, which suggests that rabbits may be a new source of human HEV infection.
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Affiliation(s)
- Peng Liu
- Department of Microbiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, People’s Republic of China
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