Mar. Drugs 2012, 10(4), 727-743; doi:10.3390/md10040727
Article

A Lactose-Binding Lectin from the Marine Sponge Cinachyrella Apion (Cal) Induces Cell Death in Human Cervical Adenocarcinoma Cells

1 Department of Biochemistry, Federal University of Rio Grande do Norte, Natal, RN, 59072-970, Brazil 2 Department of Nutrition, Federal University of Rio Grande do Norte, Natal, RN, 59072-970, Brazil 3 Department of Cellular Biology and Genetic, Federal University of Rio Grande do Norte, Natal, RN, 59072-970, Brazil
* Author to whom correspondence should be addressed.
Received: 6 January 2012; in revised form: 23 February 2012 / Accepted: 5 March 2012 / Published: 28 March 2012
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Abstract: Cancer represents a set of more than 100 diseases, including malignant tumors from different locations. Strategies inducing differentiation have had limited success in the treatment of established cancers. Marine sponges are a biological reservoir of bioactive molecules, especially lectins. Several animal and plant lectins were purified with antitumor activity, mitogenic, anti-inflammatory and antiviral, but there are few reports in the literature describing the mechanism of action of lectins purified from marine sponges to induce apoptosis in human tumor cells. In this work, a lectin purified from the marine sponge Cinachyrella apion (CaL) was evaluated with respect to its hemolytic, cytotoxic and antiproliferative properties, besides the ability to induce cell death in tumor cells. The antiproliferative activity of CaL was tested against HeLa, PC3 and 3T3 cell lines, with highest growth inhibition for HeLa, reducing cell growth at a dose dependent manner (0.5–10 µg/mL). Hemolytic activity and toxicity against peripheral blood cells were tested using the concentration of IC50 (10 µg/mL) for both trials and twice the IC50 for analysis in flow cytometry, indicating that CaL is not toxic to these cells. To assess the mechanism of cell death caused by CaL in HeLa cells, we performed flow cytometry and western blotting. Results showed that lectin probably induces cell death by apoptosis activation by pro-apoptotic protein Bax, promoting mitochondrial membrane permeabilization, cell cycle arrest in S phase and acting as both dependent and/or independent of caspases pathway. These results indicate the potential of CaL in studies of medicine for treating cancer.
Keywords: HeLa; lectin; antitumor; marine sponge; Cinachyrella apion

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MDPI and ACS Style

Rabelo, L.; Monteiro, N.; Serquiz, R.; Santos, P.; Oliveira, R.; Oliveira, A.; Rocha, H.; Morais, A.H.; Uchoa, A.; Santos, E. A Lactose-Binding Lectin from the Marine Sponge Cinachyrella Apion (Cal) Induces Cell Death in Human Cervical Adenocarcinoma Cells. Mar. Drugs 2012, 10, 727-743.

AMA Style

Rabelo L, Monteiro N, Serquiz R, Santos P, Oliveira R, Oliveira A, Rocha H, Morais AH, Uchoa A, Santos E. A Lactose-Binding Lectin from the Marine Sponge Cinachyrella Apion (Cal) Induces Cell Death in Human Cervical Adenocarcinoma Cells. Marine Drugs. 2012; 10(4):727-743.

Chicago/Turabian Style

Rabelo, Luciana; Monteiro, Norberto; Serquiz, Raphael; Santos, Paula; Oliveira, Ruth; Oliveira, Adeliana; Rocha, Hugo; Morais, Ana Heloneida; Uchoa, Adriana; Santos, Elizeu. 2012. "A Lactose-Binding Lectin from the Marine Sponge Cinachyrella Apion (Cal) Induces Cell Death in Human Cervical Adenocarcinoma Cells." Mar. Drugs 10, no. 4: 727-743.

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