将中文句子翻译为英文段落使逻辑清晰更加学术化：结果表明：LNT在30-625 μgmL的浓度范围内对脾脏T淋巴细胞无毒性作用此为LNT的最大安全浓度范围。浓度为25×10-8 molL的地塞米松能够有效抑制T淋巴细胞的活力。600 μgmL的LNT对于DEX造成的脾脏淋巴细胞增殖抑制有显著的恢复作用并能显著提高IL-12 mRNA和IL-2 mRNA的表达水平p005300 μgmL的LNT能显著

The results showed that LNT had no toxic effect on splenic T lymphocytes in the concentration range of 30-625 μg/mL, which was the maximum safe concentration range for LNT. Dexamethasone at a concentration of 2.5×10-8 mol/L effectively inhibited the activity of T lymphocytes. LNT at 600 μg/mL had a significant restorative effect on the proliferation inhibition of splenic lymphocytes caused by DEX, and significantly increased the expression levels of IL-12 mRNA and IL-2 mRNA (p<0.05). LNT at 300 μg/mL significantly promoted the differentiation of splenic T lymphocytes (p<0.05), and significantly increased the expression levels of IFN-γ mRNA and IL-2 mRNA (p<0.05). These results suggest that LNT can enhance the proliferation, differentiation, and cytokine production ability of splenic T lymphocytes after DEX treatment.