Condiloma gigante (tumor de Buschke-Löwenstein) de la vulva / Giant condyloma (Buschke-Lowenstein tumor) of the vulva

El condiloma gigante o tumor de Buschke-Löwenstein, a pesar de ser considerado una entidad benigna debido a sus características anatomopatológicas, presenta una alta capacidad de recurrencia y transformación maligna, con una mortalidad del 20 %. Se presenta el caso de una paciente con un tumor de Buschke-Löwenstein de 5 años de evolución que tomó vulva y ocluyó el orificio vaginal con extensión periuretral y ano. El diagnóstico viral mostró la presencia del virus del papiloma humano tipo 6 como único genotipo infectante. Se le aplicó un tratamiento compuesto de cirugía, radioterapia, inmunoterapia y antiviral con resultados satisfactorios. El seguimiento a 5 años mostró la aparición de pequeños condilomas acuminados los cuales fueron tratados con ácido tricloroacético. Es de gran importancia realizar un diagnóstico clínico y anatomopatológico del tumor de Buschke-Löwenstein previo al tratamiento, con vista a definir el grado de penetración e invasión local. La cirugía con amplio margen con o sin otros tratamientos adicionales es la terapéutica más eficaz reportada en el manejo de esta afección. Un seguimiento clínico de las pacientes permite detectar la posible recurrencia de la enfermedad.

In spite of being considered a benign entity due to anatomo-pathological characteristics, giant Condylom or Buschke-Löwenstein tumour has a high capacity of recurrence and malignant transformation, with a 20 % of mortality. To present a patient's case that has a Buschke-Löwenstein tumour of 5 years of evolution, that involved the vulvae, periuretral, anus and vagina. Viral diagnostics showed a presence of the Human Papillomavirus type 6 as the only infecting genotype. Surgery, radiotherapy, immunotherapy and antiviral treatments were applied to her with satisfactory results. The follow up 5 years showed arising of smalls condyloma acuminatum which were treated with tricloroacetic acid. A clinical and anatomo-pathological diagnosis of the Buschke-Löwenstein tumour in order to define the penetration´s grade and local invasion, it is necessary before the treatment. The wide margin surgery with or without additional treatment is the most efficient therapeutic reported in handling this pathology. A continuous clinical following allows to detect a possible recurrence of this disease.

Production of human papillomavirus type 6 virus-like particles and detection of its neutralizing antibodies / 中华微生物学和免疫学杂志

Objective To produce human papillomavirus type 6(HPV-6)virus-like particles with Escherichia coli expression system and study its immunogenicity.Methods HPV-6 L1 gene was inserted into pmkaryotic expression vector pTO-T7 and then expressed in Escherichia coli ER2566.The HPV-6 L1 protein was purified by ammonium sulfate precipitation,ion-exchange chromatography,and hydrophobic interaction chromatography.Then the purified HPV-6 L1 self-assembled into virus-like particle after removing 1,4dithiothreitol(DTr).The morphology of the virus-like particles was investigated with dynamic light scatter and transmission electron microscopy,and the immunogenicity was determined with in vitro pseudownons neutralization as8ay.Results HPV-6 L1 was expressed in soluble form in Escherichia coli.Following the removal of DTT,purified HPV-6 L1 protein could assemble into virus-like particles as 25 am in the radius.And the animal immunization test showed HPV-6 virus-like particles can elite hish titer neutralizing antibodies.Conclusion The bacterially expressed HPV-6 L1 VLP is highly immunogenieity and easy to produce.And it can be good candidate of HPV-6 vaccine.