特异性转移因子对荷瘤早期和晚期小鼠细胞免疫功能及生存期的影响

目的研究特异性转移因子（ＳＴＦ）对荷瘤小鼠的抗肿瘤作用。方法在小鼠腹腔内接种Ｓ１８０细胞同时腹腔注射５１８０－ＳＴＦ，测定天然杀伤（ＮＫ）和淋巴因子激活的杀伤（ＬＡＫ）活性、淋巴细胞转化（淋转）、ＬＡＫ特异杀伤活性及生存期。结果荷瘤小鼠ＮＫ和ＬＡＫ活性及淋转较正常小鼠明显低下（分别为１４．５５％±７１３％、１３．８２％±６．６４％、４４．１５±６．９４ＳＩ；２７．７４％±６．６７％、２９．３８％±９．１６％、６９．１４±７．６７ＳＩ），生存期明显缩短（分别为１７．５０±２．００ｄ和＞４５ｄ）。在荷瘤同时应用５１８０－ＳＴＦ，可部分阻止ＮＫ和ＬＡＫ活性及淋转的下降（分别为１８．６４％±７．１８％、２２．８４％±７．２２％和５３．０３±９．１５ＳＩ），延长生存期（２６．２５±４．４０ｄ），还可明显诱导ＬＡＫ特异活性。荷瘤３天后应用５１８０－ＳＴＦ，仅能部分诱导ＬＡＫ特异活性，不能延长生存期。结论ＳＴＦ可能有助于阻止癌前病变向癌转化，而对晚期肿瘤效果不佳。

EFFECTS OF SPECIFIC TRANSFER FACTOR ON THE CELLULAR IMMUNE FUNCTION AND SURVIVAL TIME IN MICE

PURPOSE To study the anti-tumor effects of specific transfer factor (STF) on tumor bearing mice.METHODS Effects of S180-STF on NK, LA activities, lymphocyte transformation, LAK cell specific cytotoxic activity to S180 cells and survival time of the mice bearing S180 cells in early and later periods were observed.RESULTS S180-STF could prevent partly the decrease of NK,LAK activities and lymphocyte transformation,induce markedly LAK specific cytotoxic activity and prolong survival of the mice when S180-STF was used simultaneously with the injection of S180 cells into the abdominal cavity of the mice. When used 3days later after injecting S180 cells,S180-STF could only induce LAK specific cytotoxicity,but could not prolong survival of the mice.CONCLUSIONS STF may be more efficacious when STF is combined with other methods of treatment.