探討木蘭素抑制腎臟癌細胞轉移是透過調控基質金屬蛋白酵素表現之分子機制

近十年來，台灣腎癌發生率顯著增加，尤其在洗腎患者、慢性腎病等高危險群中。當癌細胞轉移，無法切除時會依賴標靶藥物或免疫療法。然而，標靶藥物的副作用常加重腎損傷，惡化腎功能。因此，尋找有效針對腎癌的天然藥物成為研究重點。木蘭素(Magnolin)主要從植物厚朴提取，具有抗敏、抗炎等功效，並能抑制多種癌細胞的侵襲與轉移。然而，Magnolin對腎癌細胞的增殖和轉移影響及其潛在分子機制仍不明確。本研究深入探討Magnolin對腎癌細胞的生物功能、訊息傳遞和基因調控。實驗結果顯示，Magnolin能有效降低腎癌細胞的移動和侵襲能力，主要調控分子為基質金屬蛋白酶MMP3、MMP9、MMP13。進一步研究發現，Magnolin通過抑制TGF-β1/SMAD路徑中SMAD2和SMAD3的磷酸化，減少其進入細胞核，從而降低下游轉錄因子c-Jun的表達，抑制MMP3、MMP9、MMP13的轉錄活性，藉此抑制腎癌細胞的轉移。此研究結果為開發新型腎癌治療藥物提供重要理論基礎，顯示了Magnolin在腎癌治療中的潛在應用價值。

In the past decade, the incidence of renal cancer has increased significantly in Taiwan, particularly among high-risk groups such as dialysis patients and those with chronic kidney disease. When cancer cells metastasize and cannot be surgically removed, targeted drugs or immunotherapy are often relied upon. However, the side effects of targeted drugs can exacerbate kidney damage and worsen kidney function. As a result, finding effective natural drugs for renal cancer has become a significant focus of research. Magnolin is mainly extracted from the plant Magnolia officinalis, possesses anti-allergic and anti-inflammatory effects and can inhibit the invasion and metastasis of various cancer cells. However, its impact on renal cancer cell proliferation and metastasis and its underlying molecular mechanisms remains unclear. This study deeply explores the biological functions, signal transduction and gene regulation associated with Magnolin's effects on renal cancer cells. Experimental results indicate that Magnolin can effectively reduce the migration and invasion abilities of renal cancer cells. The primary regulatory molecules involved are matrix metalloproteinases MMP3, MMP9, and MMP13. Further research reveals that Magnolin inhibits the phosphorylation of SMAD2 and SMAD3 in the TGF-β1/SMAD pathway, reducing their entry into the nucleus. This inhibition lowers the expression of the downstream transcription factor c-Jun, subsequently decreasing the transcriptional activity of MMP3, MMP9, and MMP13, thereby inhibiting the metastasis of renal cancer cells. The findings of this study provide a crucial theoretical basis for the development of new renal cancer treatments and demonstrate the potential application value of Magnolin in treating renal cancer.