Marine hydroid perisarc: A chitin- and melanin-reinforced composite with DOPA-iron(III) complexes

作者：Hwang Dong Soo^*; Masic Admir; Prajatelistia Ekavianty; Iordachescu Mihaela; Waite J Herbert

来源：Acta Biomaterialia, 2013, 9(9): 8110-8117.

DOI：10.1016/j.actbio.2013.06.015

• Hydroid
• Perisarc
• DOPA
• Chitin
• DOPA-iron(III) complex

Many marine invertebrates utilize biomacromolecules as building blocks to form their load-bearing tissues. These polymeric tissues are appealing for their unusual physical and mechanical properties, including high hardness and stiffness, toughness and low density. Here, a marine hydroid perisarc of Aglaophenia latirostris was investigated to understand how nature designs a stiff, tough and lightweight sheathing structure. Chitin, protein and a melanin-like pigment, were found to represent 10, 17 and 60 wt.% of the perisarc, respectively. Interestingly, similar to the adhesive and coating of marine mussel byssus, a DOPA (3,4-dihydroxyphenylalanine) containing protein and iron were detected in the perisarc. Resonance Raman microprobe analysis of perisarc indicates the presence of catechol-iron(III) complexes in situ, but it remains to be determined whether the DOPA-iron(III) interaction plays a cohesive role in holding the protein, chitin and melanin networks together.

• 出版日期2013-9