数据日期 2026-10-29 · 生成时间 2026-10-29 06:03
研究问题
（原文未设独立引言节）
方法
Additionally, a bioactive extract of D. nanus (males) obtained in the warm season (February 2017) from the same location and following the same extraction technique, previously reported by our group as a potent source of multitarget agents [19], was included as a reference benchmark (“Dn-2017”) to evaluate seasonal consistency.；Chemical Characterization of the Ex] To assess the chemical complexity and evaluate qualitative variations associated with sex and seasonality, the extracts were analyzed by Reversed-Phase High-Performance Liquid Chromatography (RP-HPLC).；Separations were carried out on an Atlantis C18 column (5 µm, 4.6 × 150 mm; Waters Corp., Wexford, Ireland) with a 5–80% ACN/H2O gradient (0.8 mL min−1, 33 min).；The samples were processed and analyzed at the Advanced Mass Spectrometry Facility (Florida International University, Miami, FL, USA).
核心结论
For D. nanus (2022), the male extracts displayed the highest protein content (58%), followed by females (50%) and juveniles (38%).；Similarly, D. sanborni showed a comparable protein content (47%), while S. nasicus exhibited a lower protein recovery (36%).；Previously, Dn-2017 (characterized under the same extraction and quantification protocol at the time of its collection) had presented a content of 48% [19], numerically similar to the 2022 Dn female extract. ‖ 结论：These findings should nonetheless be interpreted within the scope of the present work.
局限
At the same time, as emphasized in previous analyses of peptide bioinformatic tools, in silico predictions should be regarded primarily as an initial filtering strategy, since their outputs are strongly conditioned by the underlying algorithms and training datasets and may therefore differ across platforms; accordingly, such results are best interpreted as preliminary, hypothesis-generating evidence to guide candidate selection rather than as conclusive proof of biological activity [51].；The in silico pharmacological descriptors described in Section 3.5 provide a preliminary and exclusively computational outlook.
对本项目的价值
★★☆☆☆ 脑老化是最大未满足需求，也是终点最难量化的领域；biomarker 与认知读数选择最敏感。最大样本量约 17；设计 定性研究。
全文来源
PMC JATS 全文（正文 52,549 字符，已过标题/DOI 逐字归属校验）
原文题录
- 英文标题：From Amphibian Extracts to Focused Libraries: An Algorithm-Based Strategy to Uncover Potent Multi-Target Anti-Alzheimer Peptides.
- 期刊与标识：Biomolecules · PMID 42939712 · DOI 10.3390/biom16101458**
B 级证据分级：B 级（同行评议临床前研究，主要为动物模型）
本文核心结论来自动物模型或体外细胞学，属临床前证据，不能外推至人体。「延长健康寿命」「改善功能」等表述在小鼠中的意义，与人类临床结局之间仍有距离。
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