Tenofovir disoproxil fumarate-associated hypophosphatemia as determined by fractional excretion of filtered phosphate in HIV-infected patients

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• 作者：Chien-Yu Cheng^a ; ^{s841060@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Shu-Yin Chang^b ; ^{wwjd0211@mail.tygh.gov.tw" class="auth_mail" title="E-mail the corresponding author} ; Mei-Hui Lin^b ; ^{mayway@mail.tygh.gov.tw" class="auth_mail" title="E-mail the corresponding author} ; Shin-Yen Ku^b ; ^{yen376@mail.tygh.gov.tw" class="auth_mail" title="E-mail the corresponding author} ; Na-Lee Sun^b ; ^{hiv1234@mail.tygh.gov.tw" class="auth_mail" title="E-mail the corresponding author} ; Shu-Hsing Cheng^a ; ^{shuhsingcheng@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Tenofovir disoproxil fumarate (TDF) ; Hypophosphatemia ; Fractional excretion of filtered phosphate (FePi)
• 刊名：Journal of Infection and Chemotherapy
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：22
• 期：11
• 页码：744-747
• 全文大小：270 K

文摘

Tenofovir disoproxil fumarate (TDF) -containing regimens have been associated with nephrotoxicity and hypophosphatemia in HIV-infected patients. The objective of this study was to assess the possible risk factors for hypophosphatemia and evaluate the relationship between fractional excretion of filtered phosphate (FePi) and hypophosphatemia in TDF users.

Patient and methods

Patients were enrolled in a prospective cohort study between January 2011 and December 2014. We classified experienced HIV-infected patients (individuals maintained on antiretroviral therapy (ART) for 6 months or more) and naïve patients into 3 treatment groups: TDF-containing ART (group 1), non-TDF-containing ART (never received TDF or had not received TDF in the past 6 months; group 2) and naive to antiretroviral therapy (group 3). Specimens from each individual were assessed for serum phosphate, serum creatinine, urine phosphate, and urine creatinine. Multivariable logistic regression was performed to control for the following variables measured at baseline: eGFR, age, sex, sexual orientation, injection drug use (IDUs), HIV-RNA viral load, and CD4 cell count.

Results

The frequency of hypophosphatemia in groups 1, 2, and 3 was 20.2%, 7.2%, and 14.6%, respectively (P = 0.002). FePi above 10% also was significantly associated with hypophosphatemia (P = 0.003; adjusted odds ratio = 2.54). Patients with elevated CD4 cell counts (>500 cells/μL) exhibited a lower risk of hypophosphatemia (P = 0.002; adjusted odds ratio = 0.35).

Conclusions

Hypophosphatemia is a multifactorial etiology; FePi was confirmed as a suggested method to predict the risk of hypophosphatemia in TDF users.

Clinical Trial Number: TYGH103011.