Background: It is unclear whether enteric dysfunction and protein losses contribute to hypoproteinemia, which heralds poor survival in HIV infection.

Methods: We investigated alpha-1-antitrypsin-clearance (AAT-CL), D-xylose resorption and total gut transition time in 14 HIV+ patients with hypoproteinemia (serum protein < 6 g/dl, albumin < 3 g/dl, median CD4-cell count 58/microl; (group I)), in 10 asymptomatic HIV+ patients (median CD4-cell count 290/microl, (group II)) and in 15 healthy volunteers (group III).

Results: AAT-CL in group I (16.5 (2.9 278.2) ml/d; median (range)) was higher than in groups II (9.5 (1.7 23.1) ml/d) and III (10.6 (0.8 19.5) ml/d; p = 0.0114). Likewise, D-xylose recovery was on average threefold lower in group I than in groups II (p = 0.0009) and III ( p < 0.0001), whereas total gut transition time was significantly shorter in both HIV-infected groups (group I: 49.8 h (23.5-72.7), p=0.0431; group II: 32.6 h (23-54.6), p=0.0104) than in the healthy controls (group III 61.6 h (39.1-87.7)).

Conclusions: Thus, impaired intestinal resorption and enteral protein losses may contribute to hypoproteinemia in advanced HIV infection, whereas accelerated intestinal motility may be present already in asymptomatic stages of HIV infection.

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