TY - JOUR
T1 - Nontoxic piperamides and their synthetic analogues as novel antifouling reagents
AU - Huang, Xiang-Zhong
AU - Xu, Ying
AU - Zhang, Yi-Fan
AU - Zhang, Yu
AU - Wong, Yue Him
AU - Han, Zhuang
AU - Yin, Yan
AU - Qian, Pei-Yuan
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): SA-C0040, UK-C0016
Acknowledgements: This study was supported by a grant (DY125-15-T02) from the China Ocean Mineral Resources Research and Development Association, an award (SA-C0040/UK-C0016) from the King Abdullah University of Science and Technology to Pei-Yuan Qian and the National Natural Science Foundation of China (No. 21262047). The authors are grateful to the School of Chemistry and Biotechnology, Yunnan University of Nationalities for measuring the NMR and MS spectra. They also acknowledge Dr Zilong Wen of the Hong Kong University of Science and Technology for providing zebra fish embryos.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2014/3/25
Y1 - 2014/3/25
N2 - Bioassay-guided isolation of an acetone extract from a terrestrial plant Piper betle produced four known piperamides with potent antifouling (AF) activities, as evidenced by inhibition of settlement of barnacle cypris larvae. The AF activities of the four piperamides and 15 synthesized analogues were compared and their structure-activity relationships were probed. Among the compounds, piperoleine B and 1-[1-oxo-7-(3′,4′-methylenedioxyphenyl)-6E-heptenyl]-piperidine (MPHP) showed strong activity against settlement of cyprids of the barnacle Balanus amphitrite, having EC50 values of 1.1 ± 0.3 and 0.5 ± 0.2 μg ml-1, respectively. No toxicity against zebra fish was observed following incubation with these two compounds. Besides being non-toxic, 91% of piperoleine B-treated cyprids and 84% of MPHP-treated cyprids at a concentration of 100 μM completed normal metamorphosis in recovery bioassays, indicating that the anti-settlement effect of these two compounds was reversible. Hydrolysis and photolysis experiments indicated that MPHP could be decomposed in the marine environment. It is concluded that piperamides are promising compounds for use in marine AF coatings. © 2014 © 2014 Taylor & Francis.
AB - Bioassay-guided isolation of an acetone extract from a terrestrial plant Piper betle produced four known piperamides with potent antifouling (AF) activities, as evidenced by inhibition of settlement of barnacle cypris larvae. The AF activities of the four piperamides and 15 synthesized analogues were compared and their structure-activity relationships were probed. Among the compounds, piperoleine B and 1-[1-oxo-7-(3′,4′-methylenedioxyphenyl)-6E-heptenyl]-piperidine (MPHP) showed strong activity against settlement of cyprids of the barnacle Balanus amphitrite, having EC50 values of 1.1 ± 0.3 and 0.5 ± 0.2 μg ml-1, respectively. No toxicity against zebra fish was observed following incubation with these two compounds. Besides being non-toxic, 91% of piperoleine B-treated cyprids and 84% of MPHP-treated cyprids at a concentration of 100 μM completed normal metamorphosis in recovery bioassays, indicating that the anti-settlement effect of these two compounds was reversible. Hydrolysis and photolysis experiments indicated that MPHP could be decomposed in the marine environment. It is concluded that piperamides are promising compounds for use in marine AF coatings. © 2014 © 2014 Taylor & Francis.
UR - http://hdl.handle.net/10754/599004
UR - http://www.tandfonline.com/doi/abs/10.1080/08927014.2014.889688
UR - http://www.scopus.com/inward/record.url?scp=84898546953&partnerID=8YFLogxK
U2 - 10.1080/08927014.2014.889688
DO - 10.1080/08927014.2014.889688
M3 - Article
C2 - 24666035
SN - 0892-7014
VL - 30
SP - 473
EP - 481
JO - Biofouling
JF - Biofouling
IS - 4
ER -