Prevalência de anticorpos anti-herpesvírus humano tipo 8 (HHV-8) em soros de pacientes com insuficiência renal crônica / Prevalence of human herpesvirus-8 (HHV-8) antibodies in serum samples from patients with chronic kidney disease

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Human herpesvirus 8 (HHV-8) infection is frequently associated with Kaposis sarcoma (KS) in immunodeficient and renal transplanted patients. The HHV-8 seroprevalence in healthy populations varies from 1% to 8%. The present study aimed to determine the HHV-8 seroprevalence and antibodies titers in chronic kidney disease (CKD) patients with or without substitutive kidney therapy (SKT) attended at Hospital do Rim e Hipertensão and Casa da Diálise of UNIFESP, and at Santa Casa de Misericórdia de São Paulo. Secondarly, to compare the serological results with those obtained from populations of the same geographic region, presenting other risk factors for acquiring infectious diseases. Serum samples were collected from 805 CKD patients: 295 under hemodialysis, 54 under peritoneal dialysis, and 456 in ambulatorial assistance without SKT. Latent and Lytic HHV-8 antibodies were searched using indirect immunofluorescence assays that were standardized at Immunology Department of Instituto Adolfo Lutz. Chi-Square test and/or Fishers exact test were performed for comparing categorical variables including epidemiological, clinical and laboratorial data, and HHV-8 serum status. Continuos variables associated with HHV-8 antibodies titers were compared using Mann Whitney or Kruskal Wallis tests. An overall HHV-8-seropositivity of 18.0% was detected in CKD patients: 18.3% in patients under SKT and 17.7% in patients without SKT. Since no difference was detected in HHV-8-seropositivity among patients, they were considered as a unique group for subsequent analysis. A strong association between HHV-8-seropositivity and previous transplant was detected (p<0.001), along with an association with others sexually transmitted diseases (p=0.003), with emphasis for syphilis (p=0.021). In addition, no other data was associated with HHV-8-seropositivity, although higher proportions of HHV-8-seropositivity were detected in samples from elderly persons. In addition, more HHV-8 Lytic antibodies positive samples, and higher titers of LANA antibodies were detected. HHV-8 seroprevalence obtained from CKD patients was similar to the HHV-8 prevalence detected among HIV/Aids patients (20.4%), who were considered a high-risk group for this viral infection. On the other hand, the HHV-8 seroprevalence of CKD patients (18.0%) was lower than the prevalence of patients with epidemic KS (89.3%), classic KS (100.0%) and endemic KS (87.5%), and higher than the patients with mental and/or physical deficiency (1.6%) and health professionals (1.1%). All analyzed groups had more HHV-8-seropositive samples for Lytic antibodies and higher titers of LANA antibodies, with exception for the health professionals. The highest LANA antibodies titers were found among KS patients groups. No other association was found. In conclusion, the obtained results points out CKD patients as a high prevalent population for HHV-8 infection, similar to HIV/Aids patients from the same geographic area. As far, it suggests that HHV-8 seropositive CKD patients should be followed up in order to verify whether LANA antibodies titers have prognostic value. In confirming this hypothesis, it may propose to include the use of HHV-8 serology in the screening testing in kidney pre-transplant.

ASSUNTO(S)

seroprevalence antibodies titer imunologia herpesvírus humano tipo 8 sarcoma de kaposi diálise peritoneal imunofluorescência indireta kaposi s sarcoma título de anticorpos chronic kidney disease doenças infecciosas soroprevalência insuficiência renal crônica human herpesvirus 8

ACESSO AO ARTIGO

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