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Câncer de próstata: novo tratamento da Janssen reduz em 72% o risco de aparecimento de metástase ou morte

A novidade, resultado do estudo clínico SPARTAN, foi apresentada durante o American Society of Clinical Oncology Genitourinary Cancers Symposium, em São Francisco, nos Estados Unidos, e publicada no New England Journal of Medicine


News provided by

Janssen

Feb 22, 2018, 06:00 ET

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SÃO PAULO, 22 de fevereiro de 2018 /PRNewswire/ -- No Brasil, o câncer de próstata é o segundo mais comum entre os homens, atrás apenas do câncer de pele não-melanoma[i]. Apesar dos avanços no diagnóstico e no tratamento em estágios cada vez mais iniciais, não havia medicamentos aprovados para os pacientes que demonstram, por meio de um marcador detectado no sangue, que o câncer de próstata voltou a progredir após o tratamento da doença localizada, antes do surgimento da metástase.

Para esses pacientes agora se apresenta uma nova opção com o nome de apalutamida, medicamento desenvolvido pela Janssen, empresa farmacêutica da família de companhias Johnson & Johnson. O produto acaba de receber sua primeira liberação de uso no mundo (no dia 14 de fevereiro), pela agência reguladora de medicamentos dos Estados Unidos, a Food and Drug Administration (FDA), após avaliação dos dados do estudo em regime de priorização pelo órgão.

Comparada ao placebo, a apalutamida comprovou diminuir em 72%[ii] o risco do surgimento da metástase ou de morte e proporcionou um ganho na mediana de sobrevida livre de metástase de mais de dois anos. Outro dado promissor do estudo foi que a apalutamida reduziu em 51%[iii] o risco da segunda progressão da doença (PFS2 - tempo de progressão da doença ou morte após o segundo tratamento), o que sinaliza que a apalutamida também pode ter impacto em uma melhor resposta dos pacientes a tratamentos subsequentes.

"Esses resultados são os primeiros a convencer que as metástases podem ser adiadas nesse estágio da doença e sugerem que a apalutamida pode se tornar o padrão de tratamento desses pacientes", afirmou Eric Small, investigador-líder do estudo SPARTAN e chefe da divisão de Hematologia e Oncologia da Universidade da Califórnia.

"A Janssen já está trabalhando para que o medicamento também seja uma opção de tratamento para os pacientes brasileiros", adianta Telma Santos, Diretora Médica da Janssen Brasil.

Sobre o estudo clínico SPARTAN[i]

SPARTAN, é um estudo clínico de fase 3, multicêntrico, randomizado, duplo-cego, com braço-controle por placebo, que englobou 1.201 pacientes com câncer de próstata não-metastático resistente à castração e foi conduzido em 332 centros em 26 países na América do Norte, Europa, Ásia e Austrália. Os pacientes foram randomizados em 2:1 para receber apalutamida em combinação com terapia de deprivação androgênica (ADT) (n=803) ou placebo em combinação com ADT (n=398).

A apalutamida em combinação com ADT reduziu o risco de metástase ou morte em 72% em comparação com placebo em combinação com ADT (HR = 0.28; 95% CI, 0.23-0.35; p < 0.0001).

A mediana de sobrevida livre de metástase foi de 40,5 meses para apalutamida em combinação com ADT comparado a 16,2 meses com o placebo em combinação com ADT, prolongando a sobrevida livre de metástase em mais de dois anos. O benefício de sobrevida livre de metástase foi observado de maneira consistente em todos os subgrupos de pacientes.

Em outros achados do estudo, a apalutamida em combinação com ADT comparado ao placebo em combinação com ADT também reduziu em 94% o risco de progressão do PSA (Antígeno Prostático Específico) (HR = 0.06; 95% CI, 0.05-0.08; P <0.0001) e reduziu em 51%[ii] o risco da segunda progressão da doença (PFS2 - tempo de progressão da doença ou morte após o segundo tratamento), o que sinaliza que a apalutamida também pode ter impacto em uma melhor resposta dos pacientes a tratamentos subsequentes.

Sobre a apalutamida

A apalutamida é um inibidor oral de receptor de androgênio de última geração que bloqueia a via de sinalização de andrógenos em células de câncer de próstata. A apalutamida inibe o crescimento de células cancerosas de três formas: prevenindo a ligação de andrógenos ao receptor de androgênio; bloqueando a entrada dos receptores de androgênios nas células cancerígenas; e impedindo os receptores androgênicos de se ligar ao DNA da célula maligna.

Sobre a Janssen

Na Janssen, trabalhamos para criar um mundo sem doenças. Transformar vidas buscando maneiras novas e melhores de prevenir, interceptar, tratar e curar doenças nos inspira. Reunimos as mentes mais brilhantes e buscamos as mais promissoras inovações científicas. Somos a Janssen. Colaboramos com o mundo para a saúde de todos. Para saber mais acesse: www.janssen.com/brasil. Siga a Janssen no Facebook e LinkedIn, e a J&J Carreiras no Facebook.


[i] Próstata. INCA. Disponível em http://www2.inca.gov.br/wps/wcm/connect/tiposdecancer/site/home/prostata. Acesso em 08/02/2018.

[ii] Small E., et all. SPARTAN, a phase 3 double-blind, randomized study of apalutamide (APA) vs placebo (PBO) in patients (pts) with nonmetastatic castration-resistant prostate cancer (nmCRPC). Abstract #161.

[iii] Small E., et all. SPARTAN, a phase 3 double-blind, randomized study of apalutamide (APA) vs placebo (PBO) in patients (pts) with nonmetastatic castration-resistant prostate cancer (nmCRPC). Abstract #161.

[i] Small E., et all. SPARTAN, a phase 3 double-blind, randomized study of apalutamide (APA) vs placebo (PBO) in patients (pts) with nonmetastatic castration-resistant prostate cancer (nmCRPC). Abstract #161.

[ii] Small E., et all. SPARTAN, a phase 3 double-blind, randomized study of apalutamide (APA) vs placebo (PBO) in patients (pts) with nonmetastatic castration-resistant prostate cancer (nmCRPC). Abstract #161.

Contato para a Imprensa:
(11)5090-8662, [email protected]

FONTE Janssen

Related Links

http://www.janssen.com/brasil

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