Human papillomavirus L1 protein expressed in tobacco chloroplasts self-assembles into virus-like particles that are highly immunogenic. Export

@article{citeulike:2791397, abstract = {Cervical cancer is the second most prevalent cancer in women worldwide. It is linked to infection with human papillomavirus (HPV). As the virus cannot be propagated in culture, vaccines based on virus-like particles have been developed and recently marketed. However, their high costs constitute an important drawback for widespread use in developing countries, where the incidence of cervical cancer is highest. In a search for alternative production systems, the major structural protein of the HPV-16 capsid, L1, was expressed in tobacco chloroplasts. A very high yield of production was achieved in mature plants (approximately 3 mg L1/g fresh weight; equivalent to 24\% of total soluble protein). This is the highest expression level of HPV L1 protein reported in plants. A single mature plant synthesized approximately 240 mg of L1. The chloroplast-derived L1 protein displayed conformation-specific epitopes and assembled into virus-like particles, visible by transmission electron microscopy. Furthermore, leaf protein extracts from L1 transgenic plants were highly immunogenic in mice after intraperitoneal injection, and neutralizing antibodies were detected. Taken together, these results predict a promising future for the development of a plant-based vaccine against HPV.}, author = {Fern\'{a}ndez-San Mill\'{a}n, Alicia and Ortigosa, Susana M. and Herv\'{a}s-Stubbs, Sandra and Corral-Mart\'{\i}nez, Patricia and Segu\'{\i}-Simarro, Jos\'{e} M. and Ga\'{e}tan, Julien and Coursaget, Pierre and Veramendi, Jon}, citeulike-article-id = {2791397}, citeulike-linkout-0 = {http://dx.doi.org/10.1111/j.1467-7652.2008.00338.x}, citeulike-linkout-1 = {http://www.ingentaconnect.com/content/bsc/pbi/2008/00000006/00000005/art00002}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/18422886}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=18422886}, doi = {10.1111/j.1467-7652.2008.00338.x}, issn = {1467-7652}, journal = {Plant biotechnology journal}, keywords = {chloroplast, chloroplast\_expression, hpv}, month = {June}, number = {5}, pages = {427--441}, posted-at = {2009-09-03 01:12:18}, priority = {2}, publisher = {Blackwell Publishing}, title = {Human papillomavirus L1 protein expressed in tobacco chloroplasts self-assembles into virus-like particles that are highly immunogenic.}, url = {http://dx.doi.org/10.1111/j.1467-7652.2008.00338.x}, volume = {6}, year = {2008} }

TY - JOUR ID - citeulike:2791397 L3 - citeulike-article-id:2791397 N2 - Cervical cancer is the second most prevalent cancer in women worldwide. It is linked to infection with human papillomavirus (HPV). As the virus cannot be propagated in culture, vaccines based on virus-like particles have been developed and recently marketed. However, their high costs constitute an important drawback for widespread use in developing countries, where the incidence of cervical cancer is highest. In a search for alternative production systems, the major structural protein of the HPV-16 capsid, L1, was expressed in tobacco chloroplasts. A very high yield of production was achieved in mature plants (approximately 3 mg L1/g fresh weight; equivalent to 24% of total soluble protein). This is the highest expression level of HPV L1 protein reported in plants. A single mature plant synthesized approximately 240 mg of L1. The chloroplast-derived L1 protein displayed conformation-specific epitopes and assembled into virus-like particles, visible by transmission electron microscopy. Furthermore, leaf protein extracts from L1 transgenic plants were highly immunogenic in mice after intraperitoneal injection, and neutralizing antibodies were detected. Taken together, these results predict a promising future for the development of a plant-based vaccine against HPV. IS - 5 JF - Plant biotechnology journal SN - 1467-7652 EP - 441 TI - Human papillomavirus L1 protein expressed in tobacco chloroplasts self-assembles into virus-like particles that are highly immunogenic. PB - Blackwell Publishing VL - 6 SP - 427 KW - chloroplast KW - chloroplast_expression KW - hpv AU - Fernández-San Millán, Alicia AU - Ortigosa, Susana AU - Hervás-Stubbs, Sandra AU - Corral-Martínez, Patricia AU - Seguí-Simarro, José AU - Gaétan, Julien AU - Coursaget, Pierre AU - Veramendi, Jon PY - 2008/06// UR - http://dx.doi.org/10.1111/j.1467-7652.2008.00338.x ER -