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Simultaneous quantitation of serum HBV DNA and HBeAg can distinguish between slow and fast viral responses to antiviral therapy in patients with chronic hepatitis B / A quantificação simultânea do DNA VHB e do AgHBe séricos podem distinguir entre resposta viral lenta e rápida à terapêutica anti-viral em pacientes com hepatite crônica B
Silva, Luiz Caetano da; Nova, Maria Luiza da; Ono-Nita, Suzane Kioko; Pinho, João Renato Rebello; Sitnik, Roberta; Santos, Vera Aparecida dos; Carrilho, Flair José.
  • Silva, Luiz Caetano da; University of São Paulo. School of Medicine. Department of Gastroenterology. BR
  • Nova, Maria Luiza da; University of São Paulo. School of Medicine. Department of Gastroenterology. BR
  • Ono-Nita, Suzane Kioko; University of São Paulo. School of Medicine. Department of Gastroenterology. BR
  • Pinho, João Renato Rebello; University of São Paulo. School of Medicine. Department of Gastroenterology. BR
  • Sitnik, Roberta; University of São Paulo. School of Medicine. Department of Gastroenterology. BR
  • Santos, Vera Aparecida dos; University of São Paulo. School of Medicine. Department of Gastroenterology. BR
  • Carrilho, Flair José; University of São Paulo. School of Medicine. Department of Gastroenterology. BR
Rev. Inst. Med. Trop. Säo Paulo ; 51(5): 261-268, Sept.-Oct. 2009. tab, ilus
Article in English | LILACS | ID: lil-530131
ABSTRACT

BACKGROUND:

The quantitation of serum HBeAg is not commonly used to monitor viral response to therapy in chronic hepatitis B.

METHODS:

In this study, 21 patients receiving varying therapies were followed and their viral response monitored by concomitant viral load and HBeAg quantitation in order to study the meaning and the kinetics of both parameters.

RESULTS:

It was possible to distinguish between three different patterns of viral response. The first was characterized by a simultaneous decrease in serum HBV DNA and HBeAg. The second pattern was characterized by a decrease in serum HBeAg but persistent detection of HBV DNA. The third pattern was characterized by undetectable HBV DNA with persistent HBeAg positivity, which points to a non-response (Pattern III-B) except when HBeAg levels showed a slow but steady drop, characterizing a "slow responder" patient (Pattern III-A).

CONCLUSIONS:

The first pattern is compatible with a viral response. A long-term HBeAg seropositivity with a slow and persistent decrease (Pattern III-A) is also compatible with a viral response and calls for a prolongation of anti-viral treatment.
RESUMO

INTRODUÇÃO:

A quantificação do AgHBe sérico não é habitualmente utilizada para monitorizar a resposta viral ao tratamento da hepatite crônica B.

MÉTODOS:

Neste estudo, 21 pacientes sob tratamento com diferentes terapias foram acompanhados e a resposta viral monitorizada pela quantificação concomitante da carga viral e do AgHBe a fim de investigar o significado e a cinética de ambos os parâmetros.

RESULTADOS:

Distinguiram-se três diferentes padrões de resposta viral. O primeiro caracterizou-se pela redução simultânea do HBV DNA e AgHBe séricos. O segundo padrão caracterizou-se por uma redução do AgHBe porém com detecção persistente do HBV DNA. O terceiro padrão caracterizou-se por HBV DNA indetectável com positividade persistente do AgHBe, sugerindo ausência de resposta (Padrão III-B), exceto quando os níveis de AgHBe mostraram uma queda lenta porém persistente, caracterizando um "respondedor lento" (Padrão III-A).

CONCLUSÕES:

O primeiro padrão é compatível com resposta viral. Uma seropositividade prolongada do AgHBe porém com uma redução lenta e persistente (Padrão III-A) é também compatível com resposta viral, sugerindo o prolongamento do tratamento anti-viral.
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: DNA, Viral / Hepatitis B virus / Hepatitis B, Chronic / Hepatitis B e Antigens Limits: Adult / Aged / Child / Female / Humans / Male Language: English Journal: Rev. Inst. Med. Trop. Säo Paulo Journal subject: Tropical Medicine Year: 2009 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: DNA, Viral / Hepatitis B virus / Hepatitis B, Chronic / Hepatitis B e Antigens Limits: Adult / Aged / Child / Female / Humans / Male Language: English Journal: Rev. Inst. Med. Trop. Säo Paulo Journal subject: Tropical Medicine Year: 2009 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR