如何验证谷氨酰胺依赖性？科学标准与实验方法全解析

The study does not directly demonstrate that Par3-deficient cells are more sensitive to glutamine deprivation or glutaminase inhibition than controls. While Figures 4H and 4I–O show enhanced glutamine uptake and oxidative glutaminolysis, and Figure 4E shows glucose independence, none of these establish that glutamine is required for proliferation or survival. The literature consistently demonstrates that proving glutamine dependency requires functional assays showing cell death or growth inhibition upon glutamine withdrawal or glutaminase inhibition [1][2]. Studies across multiple cancer types show that glutamine deprivation induces apoptosis via caspase activation, and that enhanced metabolism alone is insufficient to prove dependency [3][2]. Demonstrating selective loss of viability or growth upon glutamine withdrawal or GLS blockade (relative to controls) is needed to substantiate 'dependency.' Without this standard methodology, the term overstates the functional conclusion.