NEURONS CONTAINING LATENCY-ASSOCIATED TRANSCRIPTS ARE NUMEROUS AND WIDESPREAD IN DORSAL-ROOT GANGLIA FOLLOWING FOOTPAD INOCULATION OF MICE WITH HERPES-SIMPLEX VIRUS TYPE-1 MUTANT IN 1814

被引:35
作者
ECOBPRINCE, MS [1 ]
PRESTON, CM [1 ]
RIXON, FJ [1 ]
HASSAN, K [1 ]
KENNEDY, PGE [1 ]
机构
[1] MRC,VIROL UNIT,GLASGOW G11 5JR,SCOTLAND
基金
英国惠康基金;
关键词
D O I
10.1099/0022-1317-74-6-985
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The herpes simplex virus type 1 (HSV-1) mutant in1814 lacks the ability to trans-activate immediate early gene transcription and enter lytic replication but it can establish and reactivate from latency. We therefore investigated the number of neurons that expressed latency-associated transcripts (LATs) in animals latently infected with in 1814, the rescued revertant (1814R), or wild-type (wt) HSV-1. The percentage of LAT+ neurons increased with increasing doses of each of the viruses. After inoculation of equal amounts of infectious virus many more LAT- neurons were observed in animals infected with in1814 than with 1814R or wt HSV-1. Whereas the LAT+ neurons in animals infected with 1814R or wt HSV-1 were largely confined to lumbar dorsal root ganglia (DRG) L4/L5/L6 (those which innervate the lower leg), in animals infected with in 1814 they were also present in DRG not directly involved with such innervation (thoracic 12 and 13, L1, L2 and L3). We concluded that the large number of LAT+ neurons observed with in1814 was related to the high particle numbers in the inoculum and that spread of virus was related to limited replication as well as to the low neurovirulence of in1814. This spread was not unique to in1814 but when it occurred with more virulent viruses such as 1814R or wt HSV-1, it resulted in the death of the host.
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页码:985 / 994
页数:10
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