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Table 2 Turnover characteristics of HIV-1 RNA+ PBMC during cART

From: Biphasic decay kinetics suggest progressive slowing in turnover of latently HIV-1 infected cells during antiretroviral therapy

  

Cell numbersa

Decaying cell fraction

Class

Patient

Baseline (N0)

Plateau on cART (NP)

(1-NP/N0)

T1/2 (days)b

ILow

103

470

39

91.7%

0.7

 

104

661

11

98.3%

3.8

 

110

582

29

95.0%

2.5

 

111

164

14

91.5%

2.5

 

112

89

11

87.6%

6.3

 

AllC:

393 ± 114

21 ± 5.6

93 ± 1.8%

3.2 ± 0.9

IIMedium

103

36

15

58.4%

4.6

 

104

125

2.3

98.2%

4.3

 

110

122

8.2

93.3%

6.3

 

111

33

0.1

99.7%

2.4

 

112

68

1.3

98.1%

3.2

 

AllC:

76 ± 20

5.4 ± 2.8

90 ± 7.9%

4.1 ± 0.7

IIHigh

103

14

≤ 0.01

≥ 99%

8.2

 

104

39

≤ 0.01

≥ 99%

2.5

 

110

4.9

≤ 0.01

≥ 99%

13

 

111

1.1

≤ 0.01

≥ 99%

1.1

 

112

18

≤ 0.01

≥ 99%

2.3

 

AllC:

15 ± 6.6

≤ 0.01

≥ 99%

5.4 ± 2.3

IIIExtra

103

25

≤ 0.01

≥ 99%

3.8

 

104

25

≤ 0.01

≥ 99%

1.7

 

110

11

≤ 0.01

≥ 99%

0.7D

 

111

1.7

≤ 0.01

≥ 99%

0.7D

 

112

0.9

≤ 0.01

≥ 99%

0.7D

 

AllC:

13 ± 5.3

≤ 0.01

≥ 99%

1.5 ± 0.6

Total HIV+ (HIV-1 DNA)

103

1808

326

82%

22

 

104

4030

370

91%

4.0

 

110

8533

2488

71%

174

 

111

5965

938

84%

17

 

112

10094

4853

52%

1.1

 

AllC:

6086 ± 14939

1795 ± 859

76 ± 6.8

44 ± 32

  1. AHIV-1+ cells/106 PBMC
  2. BDecay half-lives were calculated assuming one phase exponential decay to a plateau according to the equations; Nt = (N0 - NP) × e-Kt + NP; t = time (days), N0 = Cell number at baseline; NP = Cell number at plateau; Nt = Cell number at time t; T1/2 = LN(0.5)/(-K). Decay constants were constrained between 0 and 1, to exclude decay half-lifes shorter than 0.7 days to account for the limited data points available during periods of initial decay
  3. CMean ± standard error (sem) of data from all five patients.
  4. DExact determination by fitting of class IIIExtr could only be achieved for patients 103 and 104 for which minimally three data-points above detection threshold were available. Half-lives of patients 110, 111 and 112 with one or two data points above threshold were estimated as 0.7 days (K = 1).