PMID- 1880539 OWN - NLM STAT- MEDLINE DCOM- 19910930 LR - 20190724 IS - 0022-510X (Print) IS - 0022-510X (Linking) VI - 103 IP - 2 DP - 1991 Jun TI - Presence of serum anti-human T-lymphotropic virus type I (HTLV-I) IgM antibodies means persistent active replication of HTLV-I in HTLV-I-associated myelopathy. PG - 203-8 AB - We investigated serum IgM antibodies against human T-lymphotropic virus type I (HTLV-I) in 29 HTLV-I associated myelopathy (HAM) patients and 34 HTLV-I carriers, using western blot analysis. Anti-HTLV-I IgM was detected in all 6 post-transfusional HAM patients and in 19 of 23 (83%) HAM patients with no history of blood transfusion, but in only 4 of 21 (19%) HTLV-I carriers. In HAM patients, HTLV-I proviral DNA integrated into peripheral blood lymphocyte (PBL) was detected by Southern blot analysis in all of the 6 (100%) and 18 of the 23 (78%). In contrast, it was detected in only 2 of 25 (8%) HTLV-I carriers. For the serum anti-HTLV-I IgM and HTLV-I provirus in PBL, the differences between the HAM and HTLV-I carriers were statistically significant (P less than 0.01). Our data indicate that the increased HTLV-I proviral DNA in PBL is produced by the persistent active replication of HTLV-I in HAM. Furthermore, Southern blot analysis showed intense bands in HAM patients with histories of blood transfusion, in whom the progression of the disease had been rapid. We conclude that the persistent active replication of HTLV-I is an important factor in the pathogenesis of HAM. FAU - Nagasato, K AU - Nagasato K AD - First Department of Internal Medicine, Nagasaki University School of Medicine, Japan. FAU - Nakamura, T AU - Nakamura T FAU - Shirabe, S AU - Shirabe S FAU - Shibayama, K AU - Shibayama K FAU - Ohishi, K AU - Ohishi K FAU - Ichinose, K AU - Ichinose K FAU - Tsujihata, M AU - Tsujihata M FAU - Nagataki, S AU - Nagataki S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - J Neurol Sci JT - Journal of the neurological sciences JID - 0375403 RN - 0 (DNA, Viral) RN - 0 (HTLV-I Antibodies) RN - 0 (Immunoglobulin M) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Blotting, Southern MH - Blotting, Western MH - DNA, Viral/analysis MH - Female MH - HTLV-I Antibodies/*analysis MH - Human T-lymphotropic virus 1/genetics/*physiology MH - Humans MH - Immunoglobulin M/*analysis MH - Male MH - Middle Aged MH - Paraparesis, Tropical Spastic/immunology/*microbiology MH - Proviruses/genetics MH - *Virus Replication EDAT- 1991/06/01 00:00 MHDA- 1991/06/01 00:01 CRDT- 1991/06/01 00:00 PHST- 1991/06/01 00:00 [pubmed] PHST- 1991/06/01 00:01 [medline] PHST- 1991/06/01 00:00 [entrez] AID - 0022-510X(91)90165-4 [pii] AID - 10.1016/0022-510x(91)90165-4 [doi] PST - ppublish SO - J Neurol Sci. 1991 Jun;103(2):203-8. doi: 10.1016/0022-510x(91)90165-4.