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Journal of Clinical Laboratory Analysis logoLink to Journal of Clinical Laboratory Analysis
. 1998 Dec 7;12(2):98–107. doi: 10.1002/(SICI)1098-2825(1998)12:2<98::AID-JCLA5>3.0.CO;2-F

Optimal conditions of immune complex transfer enzyme immunoassays for antibody IgGs to HIV‐1 using recombinant p17, p24, and reverse transcriptase as antigens

Seiichi Hashida 1, Setsuko Ishikawa 1, Kazuya Hashinaka 1, Ichiro Nishikata 1, Shinichi Oka 2, Kaoru Shimada 2, Atsushi Saito 3, Akihisa Takamizawa 4, Hideo Shinagawa 3, Eiji Ishikawa 1,
PMCID: PMC6807785  PMID: 9524294

Abstract

The immune complex transfer enzyme immunoassays for antibody IgGs to p17, p24, and reverse transcriptase (RT) of HIV‐1 were tested under various conditions. Antibody IgGs to HIV‐1 were reacted for up to 20 hr with 2,4‐dinitrophenyl‐bovine serum albumin‐recombinant HIV‐1 protein conjugates and recombinant HIV‐1 protein‐β‐D‐galactosidase conjugates, and the immune complexes formed, comprising the three components, were trapped onto polystyrene beads coated with (anti‐2,4‐dinitrophenyl group) IgG by incubation at 4–30°C for up to 2 hr with shaking and were transferred onto polystyrene beads coated with (antihuman IgG γ‐chain) IgG in the presence of excess of ϵN‐2,4‐dinitrophenyl‐L‐lysine by incubation at 4–30°C for up to 2 hr with shaking. When serum randomly collected from an HIV‐1 seropositive subject and serum included in an Western blot kit were tested, the formation of the immune complex was almost completed within 1 hr for antibody IgG to 17, within 1–2 hr for antibody IgG to p24 and within 4 hr for antibody IgG to RT. Even for antibody IgG to p17, however, the immune complex continued to be formed for at least 2 hr, when serum samples at early stages of HIV‐1 infection were tested. Trapping and transferring of the immune complexes were faster at higher temperatures and were almost completed within 0.5–1.5 hr, although the amount of the immune complexes trapped and transferred at 25 and/or 30°C increased for 0.5–1 hr, but subsequently tended to decline. When the formation, trapping, and transferring of the immune complexes were performed for 0.5, 1, and 1 hr, respectively, with shaking followed by 1 hr assay of bound β‐D‐galactosidase activity, the sensitivities for antibody IgGs to p17, p24, and RT using 10 μl of serum samples were similar to or significantly higher than those of the corresponding previous immune complex transfer enzyme immunoassays using 10 μl of serum samples, in which the formation, trapping, and transferring of the immune complexes were performed for 3, 16, and 3 hr, respectively, without shaking, followed by 2.5 hr assay of bound β‐D‐galactosidase activity, and the sensitivities for antibody IgGs to p17, p24, and RT using 100 μl of serum samples were 21–22‐fold, 5.5–6.3‐fold, and 5.3–6.0‐fold, respectively, higher. When each period of time for the formation, trapping, and transferring of the immune complexes was prolonged to up to 4 hr, the sensitivities for antibody IgGs to p17, p24, and RT using 100 μl of serum samples were improved 88–93‐fold, 15–17‐fold and 20–24‐fold, respectively, as compared with those of the previous ones. J. Clin. Lab. Anal. 12:98–107, 1998. © 1998 Wiley‐Liss, Inc.

Keywords: antibody, human immunodeficiency virus type 1, p17, p24, reverse transcriptase

References

  • 1. Hashida S, Hirota K, Hashinaka K, et al: Detection of antibody IgG to HIV‐1 in urine by sensitive enzyme immunoassay (immune complex transfer enzyme immunoassay) using recombinant proteins as antigens for diagnosis of HIV‐1 infection. J Clin Lab Anal 7: 353–364, 1993. [DOI] [PubMed] [Google Scholar]
  • 2. Hashida S, Hashinaka K, Hirota K, et al: Detection of antibody IgG to HIV‐1 in urine by ultrasensitive enzyme immunoassay (immune complex transfer enzyme immunoassay) using recombinant p24 as antigen for diagnosis of HIV‐1 infection. J Clin Lab Anal 8: 86–95, 1994. [DOI] [PubMed] [Google Scholar]
  • 3. Hashinaka K, Hashida S, Hirota K, et al: Detection of anti‐human immunodeficiency virus type 1 (HIV‐1) immunoglobulin G in urine by an ultrasensitive enzyme immunoassay (immune complex transfer enzyme immunoassay) with recombinant reverse transcriptase as an antigen. J Clin Microbiol 32: 819–822, 1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
  • 4. Hashida S, Hashinaka K, Saitoh A, et al: Diagnosis of HIV‐1 infection by detection of antibody IgG to HIV‐1 in urine with ultrasensitive enzyme immunoassay (immune complex transfer enzyme immunoassay) using recombinant proteins as antigens. J Clin Lab Anal 8: 237–246, 1994. [DOI] [PubMed] [Google Scholar]
  • 5. Ishikawa S, Hashida S, Hashinaka K, et al: Diagnosis of HIV‐1 infection with whole saliva by detection of antibody IgG to HIV‐1 with ultrasensitive enzyme immunoassay using recombinant reverse transcriptase as antigen. J Acquir Immune Defic Syndr Human Retrovirol 10: 41–47, 1995. [PubMed] [Google Scholar]
  • 6. Ishikawa S, Hashida S, Hashinaka K, et al: Whole saliva dried on filter paper for diagnosis of HIV‐1 infection by detection of antibody IgG to HIV‐1 with ultrasensitive enzyme immunoassay using recombinant reverse transcriptase as antigen. J Clin Lab Anal 10: 35–41, 1996. [DOI] [PubMed] [Google Scholar]
  • 7. Hashida S, Hashinaka K, Nishikata I, et al: Immune complex transfer enzyme immunoassay that is more sensitive and specific than Western blotting for detection of antibody immunoglobulin G to human immunodeficiency virus type 1 in serum with recombinant pol and gag proteins as antigens. Clin Diag Lab Immunol 2: 535–541, 1995. [DOI] [PMC free article] [PubMed] [Google Scholar]
  • 8. Hashida S, Hashinaka K, Nishikata I, et al: Shortening of the window period in diagnosis of HIV‐1 infection by simultaneous detection of p24 antigen and antibody IgG to p17 and reverse transcriptase in serum with ultrasensitive enzyme immunoassay. J Virol Methods 62: 43–53, 1996. [DOI] [PubMed] [Google Scholar]
  • 9. Hashida S, Hashinaka K, Nishikata I, et al: Measurement of human immunodeficiency virus type 1 p24 in serum by an ultrasensitive enzyme immunoassay, the two‐site immune complex transfer enzyme immunoassay. J Clin Microbiol 33: 298–303, 1995. [DOI] [PMC free article] [PubMed] [Google Scholar]
  • 10. Hashida S, Hashinaka K, Nishikata I, et al: Ultrasensitive and more specific enzyme immunoassay (immune complex transfer enzyme immunoassay) for p24 antigen of HIV‐1 in serum using affinity‐purified rabbit anti‐p24 Fab' and monoclonal mouse anti‐p24 Fab'. J Clin Lab Anal 10: 302–307, 1996. [DOI] [PubMed] [Google Scholar]
  • 11. Ishikawa S, Hashida S, Hashinaka K, et al: More sensitive immune complex transfer enzyme immunoassay for antibody IgG to p17 of HIV‐1 with shorter incubation time for immunoreactions and larger volumes of serum samples. J Clin Lab Anal 11: 244–250, 1997. [DOI] [PMC free article] [PubMed] [Google Scholar]
  • 12. Saitoh A, Iwasaki H, Nakata A, Adachi A, Shinagawa H: Overproduction of human immunodeficiency virus type I reverse transcriptase in Escherichia coli and purification of the enzyme. Microbiol Immunol 34: 509–521, 1990. [DOI] [PubMed] [Google Scholar]
  • 13. Saitoh A, Tanaka N, Nakata A, Ikuta K, Shinagawa H: A unique monoclonal antibody that recognizes mature p 17 of HIV‐1 but not its precursor. Microbiol Immunol 36: 105–111, 1992. [DOI] [PubMed] [Google Scholar]
  • 14. Tanaka N, Saitoh A, Nakata A, Shinagawa H: A simple method for overproduction and purification of p24 gag protein of human immunodeficiency virus tyep 1. Microbiol Immunol 36: 823–831, 1992. [DOI] [PubMed] [Google Scholar]
  • 15. Adachi A, Gendelman HE, Koenig S, et al: Production of acquired im munodeficiency syndrome‐associated retrovirus in human and nonhuman cells transfected with an infectious molecular clone. J Virol 59: 284–291, 1986. [DOI] [PMC free article] [PubMed] [Google Scholar]
  • 16. Wain‐Hobson S, Sonigo P, Danos O, Cole S, Alizon M: Nucleotide sequence of the AIDS virus, LAV. Cell 40: 9–17, 1985. [DOI] [PubMed] [Google Scholar]
  • 17. Imagawa M, Hashida S, Ohta Y, Ishikawa E: Evaluation of β‐D‐galac‐tosidase from Escherichia coli and horseradish peroxidase as labels by sandwich enzyme immunoassay technique. Ann Clin Biochem 21: 310–317, 1984. [DOI] [PubMed] [Google Scholar]

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