PMID- 26218899 OWN - NLM STAT- MEDLINE DCOM- 20161005 LR - 20200409 IS - 1873-2518 (Electronic) IS - 0264-410X (Print) IS - 0264-410X (Linking) VI - 33 IP - 51 DP - 2015 Dec 16 TI - Successful cross-protective efficacy induced by heat-adapted live attenuated nephropathogenic infectious bronchitis virus derived from a natural recombinant strain. PG - 7370-7374 LID - S0264-410X(15)01002-6 [pii] LID - 10.1016/j.vaccine.2015.07.043 [doi] AB - A natural recombinant nephropathogenic K40/09 strain of infectious bronchitis virus (IBV) was heat-adapted for possible future use as live attenuated vaccine. The K40/09 strain was selected during successive serial passages in specific-pathogen free (SPF) embryonated eggs at sub-optimal higher temperature (56 degrees C). Unlike the parental strain, the attenuated strain, designated K40/09 HP50, was found to be safe in 1-day-old SPF chicks, which showed neither mortality nor signs of morbidity, and rarely induced ciliostasis or histological changes in the trachea and kidney after intraocular and fine-spray administration. K40/09 HP50 provided almost complete protection against two distinct subgroups of a nephropathogenic strain (KM91-like and QX-like subgroup) and elicited the production of high titers of neutralizing antibody (neutralization index of 3.6). We conclude that the K40/09 HP50 vaccine virus is rapidly attenuated by heat adaptation and exhibits the desired level of attenuation, immunogenicity, and protective efficacy required for a live attenuated vaccine. These results indicate that the K40/09 vaccine could be helpful for the reduction of economic losses caused by recently emergent nephropathogenic IBV infection in many countries. CI - Copyright (c) 2015 Elsevier Ltd. All rights reserved. FAU - Lim, Tae-Hyun AU - Lim TH AD - Optipharm Inc., Osongsangmyung 6ro, Osong-eup, CheongJu, Chungcheongbuk-do, Republic of Korea. FAU - Youn, Ha-Na AU - Youn HN AD - Avian Disease Laboratory, College of Veterinary Medicine, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea. FAU - Yuk, Seong-Su AU - Yuk SS AD - Avian Disease Laboratory, College of Veterinary Medicine, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea. FAU - Kwon, Jung-Hoon AU - Kwon JH AD - Avian Disease Laboratory, College of Veterinary Medicine, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea. FAU - Hong, Woo-Tack AU - Hong WT AD - Avian Disease Laboratory, College of Veterinary Medicine, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea. FAU - Gwon, Gyeong-Bin AU - Gwon GB AD - Avian Disease Laboratory, College of Veterinary Medicine, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea. FAU - Lee, Jung-Ah AU - Lee JA AD - Division of Vaccine Research, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Osong-eup, CheongJu 363-951, Chungcheongbuk-do, Republic of Korea. FAU - Lee, Joong-Bok AU - Lee JB AD - Avian Disease Laboratory, College of Veterinary Medicine, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea. FAU - Lee, Sang-Won AU - Lee SW AD - Avian Disease Laboratory, College of Veterinary Medicine, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea. FAU - Song, Chang-Seon AU - Song CS AD - Avian Disease Laboratory, College of Veterinary Medicine, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea. Electronic address: songcs@konkuk.ac.kr. LA - eng PT - Journal Article DEP - 20150726 PL - Netherlands TA - Vaccine JT - Vaccine JID - 8406899 RN - 0 (Vaccines, Attenuated) RN - 0 (Viral Vaccines) SB - IM MH - *Adaptation, Biological MH - Animals MH - Chickens MH - Coronavirus Infections/prevention & control/*veterinary MH - Hot Temperature MH - Infectious bronchitis virus/*immunology/isolation & purification MH - Kidney/pathology MH - Poultry Diseases/immunology/*prevention & control MH - Serial Passage MH - Survival Analysis MH - Trachea/pathology MH - Vaccines, Attenuated/administration & dosage/adverse effects/immunology/isolation & purification MH - Viral Vaccines/administration & dosage/adverse effects/*immunology/isolation & purification PMC - PMC7130781 OTO - NOTNLM OT - Attenuation OT - Cross-protective efficacy OT - Heat adaptation OT - Infectious bronchitis virus OT - Safety EDAT- 2015/07/29 06:00 MHDA- 2016/10/07 06:00 PMCR- 2015/07/26 CRDT- 2015/07/29 06:00 PHST- 2015/05/26 00:00 [received] PHST- 2015/07/13 00:00 [revised] PHST- 2015/07/15 00:00 [accepted] PHST- 2015/07/29 06:00 [entrez] PHST- 2015/07/29 06:00 [pubmed] PHST- 2016/10/07 06:00 [medline] PHST- 2015/07/26 00:00 [pmc-release] AID - S0264-410X(15)01002-6 [pii] AID - 10.1016/j.vaccine.2015.07.043 [doi] PST - ppublish SO - Vaccine. 2015 Dec 16;33(51):7370-7374. doi: 10.1016/j.vaccine.2015.07.043. Epub 2015 Jul 26.