セリンは卵胞膜細胞のフェロプトーシスを阻害し、卵巣機能を維持する
Hao-Cheng Gu1,2,3, You-Qiong Zhuo2,4, Ling-Fang Wang2
1School of Pharmacy, Jiangxi Medical College, Nanchang University, Nanchang, P. R. China.
Nature communications
|January 21, 2026
まとめ
食事性セリン補給は、卵胞膜細胞のフェロプトーシスを防ぐことにより、化学療法誘発性卵巣損傷から保護します。この発見は、早発卵巣機能不全の共通メカニズムを明らかにし、セリンを卵巣の健康の鍵となる要因として示唆しています。
科学分野:
- 生殖生物学
- 腫瘍学
- 代謝性疾患
背景:
- シクロホスファミド(CTX)は、頻繁に早発卵巣機能不全(POI)を引き起こす重要な乳がん治療薬です。
- CTX誘発性POIは、卵巣顆粒膜細胞(GC)におけるセリン流出を促進するSLC1A4の発現上昇と関連しています。
- 血清セリンレベルの低下は、CTX治療を受けた患者およびライフスタイル誘発性ストレスを有する女性の卵巣機能低下と相関しています。
研究 の 目的:
- セリンが化学療法誘発性および特発性POIの役割を調査すること。
- POI予防における食事性セリン補給の治療的可能性を探求すること。
- GCにおけるセリンの保護効果の根底にある分子メカニズムを解明すること。
主な方法:
- CTX治療を受けた乳がん患者およびライフスタイル誘発性卵巣ストレスを有する女性の血清セリンレベルの分析。
- CTXに曝露されたマウスへの食事性セリン補給の投与。
- 治療群および対照群における卵巣機能、組織学、および分子マーカー(SLC1A4、S1P、Nrf2、HO-1、フェロプトーシス)の評価。
- セリン補給マウスにおけるCTXの抗がん効果の評価。
主要な成果:
- 食事性セリン補給は、抗がん作用を損なうことなく、CTX誘発性POIからマウスを効果的に保護しました。
- セリンレベルの上昇は、スフィンゴシン-1-リン酸(S1P)合成を促進することがわかりました。
- セリンの作用は、Nrf2核内転位およびそれに続くHO-1発現を阻害し、それによってGCにおけるフェロプトーシスを抑制します。
結論:
- 化学療法誘発性および特発性POIは、セリン代謝に関与する共通の根本的なメカニズムを共有しています。
- セリンは、卵巣機能を維持し、GCのフェロプトーシスを防ぐための重要な因子です。
- 食事性セリン補給は、がん患者および潜在的に他の集団におけるPOIを軽減するための有望な戦略を表します。
関連する概念動画
Feedback Inhibition
56.9K
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
56.9K
Design Example: Maintaining Level of an Embankment
417
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
417
Enzyme Inhibition
91.7K
Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
91.7K
Ovarian Cycle
3.6K
The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle...
3.6K
Role of Vitamins in Maintaining Bone Health
5.2K
The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
5.2K
Inhibition of Cdk Activity
5.6K
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
5.6K


