Souza, Ricardo BastoFrota, Annyta FernandesSilva, JoanaAlves, CelsoNeugebauer, Agnieszka ZofiaPinteus, SuseteRodrigues, José Ariévilo GurgelCordeiro, Edna Maria SilvaAlmeida, Raimundo Rafael dePedrosa, RuiBenevides, Norma Maria Barros2020-07-062020-07-062018Souza, R. B., Frota, A. F., Silva, J., Alves, C., Neugebauer, A. Z., Pinteus, S., Rodrigues, J., Cordeiro, E., de Almeida, R. R., Pedrosa, R., & Benevides, N. (2018). In vitro activities of kappa-carrageenan isolated from red marine alga Hypnea musciformis: Antimicrobial, anticancer and neuroprotective potential. International journal of biological macromolecules, 112, 1248–1256. https://doi.org/10.1016/j.ijbiomac.2018.02.0290141--8130http://hdl.handle.net/10400.8/4993This study assessed the antioxidant, antimicrobial, anticancer and neuroprotective activities of the kappa(k)-carrageenan isolated from the red alga Hypnea musciformis (Hm-SP). The chemical spectrum of the k-carrageenan fromHm-SPwas confirmed by Fourier transform infrared (FT-IR) spectroscopy.Hm-SP revealed an antibacterial and antifungal action against Staphylococcus aureus and Candida albicans, respectively. Hm-SP did not promoted cytotoxic effects against Human breast cancer (MCF-7) and Human neuroblastoma (SH-SY5Y) cell-lines. However, itwas observed a significant reduction of the cellular proliferation capacity in these cancer cells in presence of the Hm-SP. Furthermore, Hm-SP showed neuroprotective activity in 6-hydroxydopamine-induced neurotoxicity on SH-SY5Y cells by modulation of the mitochondria transmembrane potential and reducing Caspase 3 activity. In addition, Hm-SP demonstrates low antioxidant potential and did not induce significant cytotoxic effects or changes in the cell proliferation on Balb/c 3T3 mouse fibroblast cell-line. In summary, our data suggest that Hm-SP shows antimicrobial, anticancer and neuprotective activities.engjournal article10.1016/j.ijbiomac.2018.02.029