Both of these proteins, are tumor suppressors, meaning they help slow down cell growth and prevent tumors.

这些蛋肿瘤抑剂，辅助抑细胞生长，阻止肿瘤发生。

So oncogenes or mutated tumor suppressor genes allow cells to keep growing uncontrollably resulting into tumors.

因此，癌基因或突变的抑癌基因使细胞不受控地增长，导致肿瘤发生。

This happens either because the cancer brought that property with it, like SCLC, or because the brain environment forces a change, like in TMBC, turning into an immune desert.

这可能因为癌症本身带有这种特性，例如小细胞肺癌（SCLC），也可能由于大脑使肿瘤发生改变，例如在三阴性乳腺癌（TMBC）中，使其转变为免疫沙漠状态。

Thus, tumors of mature muscle or nerve cells do not occur, although tumors of less differentiated myoblastic or neuronal stem cells do.

因此，尽管有肿瘤发生在分化程度较低的成肌细胞或神经干细胞，但不会发生成熟肌肉或神经细胞的肿瘤。