B-type Proanthocyanidins with Dentin Biomodification Activity from Cocoa (Theobroma cacao).

B-type Proanthocyanidins with Dentin Biomodification Activity from Cocoa (Theobroma cacao).
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DOI:
10.1021/acs.jafc.2c04288
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发表时间:
2022-10-05
影响因子:
6.1
通讯作者:
Pauli, Guido F.
Pauli, Guido F.
中科院分区:
农林科学1区
文献类型:
--
作者:
Jing, Shu-Xi;Reis, Mariana;Alania, Yvette;McAlpine, James B.;Chen, Shao-Nong;Bedran-Russo, Ana K.;Pauli, Guido F.

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为了进行翻译研究,开发了一种可扩展的可可(Theobroma Cacao)原花青素(PAC)制备分离方案,得到了6个全B型低聚PAC,其中包括一个新的四聚体4。通过综合光谱和化学方法明确地确定了它们的结构包括绝对构型。在牙本质生物测定模型中,使用动态力学和红外光谱分析来评估PAC的牙本质生物修饰特性。与未经处理的牙本质相比,PAC处理使牙本质的生物力学强度提高了5-15倍。在PAC试剂中,五聚体肉桂单宁A3(6)的复数模量值最高,为131兆帕,而“支化”四聚体4的生物活性最低,但仍具有显著的生物活性。这项对特定单链中长寡聚PAC的研究表明,连接位点在确定这些PAC作为牙本质生物调节剂的效力方面是至关重要的。
To enable translational studies, a scalable preparative isolation scheme was developed for underivatized cocoa (Theobroma cacao) proanthocyanidins (PACs), affording six all-B-type oligomeric PACs including a new tetramer 4. Their structures including absolute configuration were unambiguously established by comprehensive spectroscopic and chemical methods. Evaluation of the PACs’ dentin biomodification properties employed dynamic mechanical and infrared spectroscopic analyses in dentin bioassay models. PAC treatment enhanced the biomechanical strength of dentin by 5- to 15-fold compared to untreated dentin. Among the PAC agents, the pentamer, cinnamtannin A3 (6), led to the highest complex modulus value of 131 MPa, whereas the “branched” tetramer, 4, showed the lowest, yet still significant, bioactivity. This study of specifically singly-linked medium-length oligomeric PACs indicates that the linkage site is paramount in determining the potency of these PACs as dentin biomodifiers.
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发表时间: 2022-02-25
影响因子: 5.1
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