Key words : Mycoplasma pneumoniae, Protective effect, 85KDa protein, non-hemolysis mutant Mycoplasma pneumoniae M. pneumoniae pneumonzae M. pneumoniae

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Transcription:

Key words : Mycoplasma pneumoniae, Protective effect, 85KDa protein, non-hemolysis mutant Mycoplasma pneumoniae M. pneumoniae pneumonzae M. pneumoniae (M. pneumoniae P24-S1, P24-S11)

M. pneumoniae FH-P2411) moniae FH-P24-S18) M. pneumoniae FH-P24-S11

Table 1 Protective effect in BALB/c mice of immunization mutants of M. pneumoniae with parent strain and hemolysis 8 weeks after last vaccination Table 2 Protective effect in BALB/c mice of immunization with parent strain and hemolysis mutants of M. pneumoniae 12 weeks after vaccination

Fig. 1 Humoral immune responses. The mean ELISA OD is represented by each point. Fig. 2 Cell mediated immune responses (MITagarose droplet method). Each column represented % of macrophage migration inhibition. Table 3 Immunological 8 weeks after last vaccination status of BALB/c mice at the time of challenge 1) Mean optical density at 405nm }SD 2) % of migration inhibition: Macrophage migration inhibition test by agarose droplet method.

Table 4 Immunological 12 weeks after vaccination status of BALB/c mice at the time of challenge 1) Mean optical density at 405nm }SD 2) % of migration inhibition: Macrophage migration inhibition test by agarose droplet method. Table 5 Protective effect in BALB/c mice after transfer of antiserum M. pneumoniae FH-P24 and mutant strains 1) Antiserum was prepared by injection of strain FH-P24 or mutant strains into guinea-pigs. 2) Antiserum was adjusted to equal ELISA IgG values and ten-fold dilution. Table 6 ELISA IgG value and recovery from trachea and lung of passively BALB/c mice after challenged with M. pneumoniae FH-P24

Mycoplasma Fig. 3 IgG-immunoblots pneumoniae免 developed with 疫 マ ウス の感 染 防御 効 果 sera from patients 689 of M.pneumoniae infection. M: marker proteins, n: M.pneumoniae pneumoniae FH-P24, b: M.pneumoniae x: P1 (165-KDa), y: 85-KDa (Coomassie P24-S1, blue し,ま た 細 胞 性 免 疫 が これ よ り低 下 した12週 後 で るP1に も防 御 率 は 低 下 し な か った と い う結 果 が 得 ら れ れ て い る が,そ た.さ らに免 疫23週 後 のP24-S1生 92KDa,62KDa21)等 IgG抗 菌 免 疫 群 で は, 体 価 は上 昇,細 胞 性 免 疫 は対 照 群 と同 じ値 に まで 低 下 した に もか か わ らず,防 御効果 に変化 は な か っ た(デ ー タ不 示).IgA,IgMに つ いて は 生 菌 免 疫8週 後,12週 られ な か った.こ 後 とも に 対 照 群 との差 は み の こ とか ら菌 の 分 離 を 指 標 に し も,ヒ stained) c: M. pneumoniae つ い て は,と く に 多 く の 報 告16) 18)がな さ れ 以 外 に も43KDa19),32KDa20), の 報 告 も み ら れ る.本 immunoblottingに よ り,親 う ち,お は み ら れ な か っ た と い う違 い が み ら れ た.こ れ が,生 可 能 性 を 示 唆 し て い る. 得 た.一 抗 血 清 で は20%の 防 御効 果 を 方 生 菌 免 疫 で は親 株 と変 らな い 防 御 効 果 を 示 したP24-S1の 抗 血 清 で 受 身 免 疫 した 群 と,効 果 の な か ったP24-S11受 果 を 示 した.す 身 免疫 群 とは ほ ぼ 同 じ結 な わ ちFH-P24と 同 じ防 御 効 果 を 得 るた め に は,両 者 と も10倍 濃 度 の 抗 血 清 を 接 種 しな けれ ぽ な ら な か った.病 原 株 攻 撃 時 に お い て 生 菌 免 疫 に よ る血 清 中 のIgG値 よ り高 い 値 を 示 す 免 疫 状 態 で あ っ て もわ ず か に20%の と どま った.こ 防御効果 に の こ とか ら も,た ん にIgG値 が高 よ そ85KDaに 菌 免 疫 に よ るP24-S1と 生 菌 免 疫 の 実 験 の 結 果 か ら細 胞 性 免 疫 よ り も む し ろlgGが た が,防 重 要 で あ る と 考 え られ,受 御 効 果 とIgG値 が平行 す るものでは ない に よ る結 果 の み で 判 定 した もの で あ るた め他 の 検 定 法 で は異 な る結 果 が得 られ る可 能 性 も否 定 で き な い. BALB/cマ ウ ス はM.pneumoniaeに 変 は お こ さ な い た め,感 指 標 と し て 判 定 し た が,再 度,本 関 わ る 因 子 を 追 求 し て ゆ き た い. 平 成 元年7月20日 proteinと よぼ れ 1) Sobeslaysky, Adsorption aminic acid 病 変 も合 せ 白 を は じめ とし て感 染 防 御 に 文 告 が あ る.な か で もattachment 菌 に対 す る感 受 性 動 物 で あ る ハ ム ス タ ー を 用 い て,肺 性 が 再 確 認 され た. 病 原 因 子 等 に関 与 す る も の と して 非 常 に 多 くの報 よ り肺 病 染 防 御 を菌 の 分 離 の み を IgGに 蛋 白 につ い て は,付 着 因 子, 身 免疫を し と い う結 果 と な っ た.細 胞 性 免 疫 に つ い て はMIT て 検 討 し,85KDa蛋 M.pneumoniaeの 対 す 間 の 差 を 生 じ させ る原 因 の一 つ で あ る い こ とだ け が 感 染 防 御 と一 致 す る の で は な く, 対 応 す る抗 原 の違 い を 検 討 す る こ との 重 要 は強 く るbandがP24-S11に 重 要 で あ ろ う と考 え られ る.そ こで,IgG抗 た 結 果,FH-P24の 株 とP24-S1で 反 応 し て い るbandの P24-S11の 体価 の 実験で トの マ イ コ プ ラ ズ マ 肺 炎 患 者 と のWestem た 感 染 防 御 で は,細 胞 性 免 疫 よ りは む しろIgGが 高 い抗 血 清 で 受 身 免 疫 した マ ウ ス を 同様 に実 験 し, a: M. P24-S11, 献 0., Prescott, B. & Chanock, of Mycoplasma receptors pneumoniae of various R.M.: to neur- cells and

possible role in virulence. J. Bacteriol., 96: 695 2) Collier, A.M. & Clyde, W.A. Jr.: Relationship between Mycoplasma pneumoniae and human respiratory epithelium. Infect. Immun., 3: 694 3) Powell, O. A., Hu, P. C., Wilson, R.M., Collier, A. M. & Baseman, J.B. Attachment of Mycoplasma pneumoniae to respiratory epithelium. Infect. Immun., 13: 959-966, 1976. 4) Gabridge, M. G. & Taylor-Robinson, D.: Interaction of Mycoplasma pneumoniae with human lung fibroblasts: Characterization of the in vitro model. Infect. Immun., 25: 446-454, 1979. 5) Cohen, G. & Sommerson, N. L.: Mycoplasma polyacrylamide gels to nitrocellulose sheets. Procedure and some applications. Proc. Natl. Acad. Sci. U. S. A., 76: 4350-4354, 1979. 16) Hu, P. C., Huang, C., Collier, A. M. & Clyde W. A. Jr.: Demonstration of antibodies to Myco- pneumoniae: Hydrogen peroxide secretion and plasma pneumoniae attachment protein in its possible role in virulence. Ann. NY Acad. Sci., 143: 85-87, 1967. human sera and respiratory Immun., 41: 437-439, 1983. secretions. Infect. 17) Brunner H., Feldner J. & Bredt W.: Effect of monoclonal antibodies to the attachment-tip on experimental Mycoplasma pneumoniae infection of hamsters: A prelinimary report. Isr. J. 7) Yayoshi, M.: Association between Mycoplasma Med. Sci., 20: 878-881, 1984. pneumoniae hemolysis, attachment, and pulmonary 18) Jacobs, E., Drews, M., Stuhlert, A., Buttner, C., pathogenicity. Yale J. Biol. Med., 56: 685 Klein, P. J., Kist, M. & Bredt, W.: Immuno- logical reaction of guinea-pigs following 8) Yayoshi, M., Araake, M., Hayatsu, E., Kawakubo, intranasal Mycoplasma pneumoniae infection Y. & Yoshioka, M.: Characterization and Immunization with the 168 KDa adherence and pathogenicity of hemolysis mutants of Mycoplasma pneumoniae. Microbiol. Immonol., 28: 303-310, 1984. 9) Yayoshi, M., Araake, M., Hayatsu, E., Takezawa, T. & Yoshioka, M.: Immunogenicity and protective effect of hemolysis mutants of Mycoplasma pneumoniae. Microbiol. Immunol., 29: 1029-1037, 1985. Holt, S. C.: Identification of a 32-Kilodalton protein of Mycoplasma pneumoniae associated with hemadsorption. Isr. J. Med. Sci., 23: 474 11) Hayatsu, E.: Acquired immunity to Myco- 21) Vu, A. C., Foy, H. M., Cartwright, F. D. & Kenny, G. E.: The principal protein antigens of isolates of Mycoplasma pneumoniae as measured plasma pneumoniae pneumonia in hamsters. Microbiol. Immunol., 22: 181-185, 1978. 12) Voller, A., Bidwell, D. & Bartlett, A.: In Mannual of clinical immunology (Rose, N.R. & Fiedman, M. ed.) p.506. Am. Soc. Microbiol, Washington D. C. 1976. 13) Harrington, J. T. Jr. & Stastny, P.: Macrophage migration from an agarose droplet: Development of a micromethod for assay of delayed hypersensitivity. J. Immunol., 110: 752 14) Laemmli, U. K.: Cleavage of stractural proteins during the assenbly of the head of bacteriophage T4. Nature, 227: 680-685, 1970. 15) Towbin, H., Staehlin, T. & Gordon, J.: Electrophoretic transfer of proteins from protein. J. Gen. Microbiol., 134: 473-479, 1988. 19) Madsen, D. R., Weiner, L. B., Mcmillan, J. A., Saeed, F. A., North, J. A. & Coates, S. R.: Direct detection of Mycoplasma pneumoniae antigen in clinical specimens by a monoclonal antibody immunoblot assay. Am. J. Clin. Pathol., 89: 95-99, 1988. 20) Baseman, J. B., Morrison-plummer, J., Drouillard, D., Puleo-Scheppke, B., Tryon, V. V. & by levels of immunoglobulin G in human serum are stable in strains collected over a 10-year period. Infect. Immun., 55: 1830-1836, 1987.

Protective Effects of Mycoplasma pneumoniae Live Vaccine or its Hyperimmune Serum on the Experimental Infection in Mice Department Masumi YAYOSHI Urawa Gakuin Eizo HAYATSU The Kitasato Institute Morimasa YOSHIOKA of Microbiology, Tokyo Women's Medical College SPF-BALB/c mice in which Mycoplasma pneumoniae cell proliferation accompanied by immunological responses had beenconfirmed, were immunized with live vaccines or with hyperimmune sera of M. pneumoniae FH-P24 and its mutant strains (P24-S1, P24-S11), were then assayed for infection-protection. Eight weeks after the last vaccination, 70 percent protection was obtained by inoculation once or twice with live FH-P24 and P24-S1 vaccines, respectively. After 12 weeks, 80% protection was achieved by FH-P24 and 60% by P24-S 1 live vaccine, while protectivity was not obtained by P24-S11 live vaccine. In case of passively immunized mice, IgG antibody titers and protective effect were not always found to be parallel. Namely, mice which were passively immunized with anti-fh-p24 serum, showed only 20% protection. However to get the above results, it was necessary that the anti-mutant strain serum be ten times higher than anti-fh-p24 serum in IgG titer. In the immunoblot anslysis, sera from patients infected with M. pneunoniae immunoblotted the 168-KDa (P1 protein) and the 85-KDa protein of FH-P24 and P24-S1, but not the 85-KDa protein of P24-S11.