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Table 2 Clinical findings and laboratory values before and after asfotase alfa (AA treatment)

From: A Japanese single-center experience of the efficacy and safety of asfotase alfa in pediatric-onset hypophosphatasia

Case

Height [cm] (SD score)

Improvement in clinical findings

ALP [IU/L]

PLP [nmol/L]

PL [nmol/L]

PLP/PL (reference)

PEA/Cr (µmol/g Cr)

6MWT [meter (% of normal)]

Bone density [g/cm2] (SD score)

Adverse effects

1

104 (− 0.8 SD)/117 (− 0.5 SD)

Pain alleviation

Growth in height

6MWT improvement

Improvement of X-ray finding

197/12977

316.1/22.9 (16.2–57.4)

13.1/22.2 (8.8–28.0)

24.1/1(1.6–3.3)

0.14/0.11 (0.08–1.08)

350 (70%)/400 (75%)

0.463 (N.R.)/0.522 (N.R.)

+

2

125 (− 2.0 SD)/136 (− 2.0 SD)

Pain alleviation

Improvement of activity intensity

6MWT improvement

400/32956

164.4/3.2 (14.5–57.3)

49.1/8.9 (7.4–17.7)

3.4/0.4 (1.2–2.5)

0.02/0.08 (0.08–1.08)

380 (60%)/433 (68%)

0.554 (− 2.8)/0.578 (− 2.7)

+

3

74 (− 2.0 SD)/87 (− 1.8 SD)

Improvement of premature teeth loss

Growth in height

Improvement of X-ray finding

79/24700

2293/137.1 (16.2–57.4)

39/96 (8.8–28.0)

58.7/1.4 (1.6–3.3)

0.5/0.18 (0.08–1.08)

0.266 (N.R.)/−

+

4

143 (− 0.3 SD)/146 (− 0.5 SD)

Pain alleviation

421/10274

100.8/− (14.5–57.3)

19.5/− (7.4–17.7)

5.2/− (1.9–5.3)

0.019/− (0.08–1.08)

330 (50%)/−

0.630 (− 2.0)/0.732 (− 1.2)

+

5

127 (− 1.9 SD)/142 (− 1.4 SD)

Pain alleviation

Growth in height

359/22743

108.2/21.9 (14.5–57.3)

17.5/43.5 (7.4–17.7)

6.2/0.5 (1.9–5.3)

0.03/0.03 (0.08–1.08)

505 (80%)/523 (81%)-

0.636 (− 1.4)/0.758(− 0.8)

+

6

155 (− 0.7 SD)/155 (− 0.7 SD)

Alleviation of pain and fatigue

6MWT improvement

135/24675

−/3.0 (14.5–57.3)

−/4.1 (7.4–17.7)

−/0.7 (1.9–5.3)

0.08/− (0.08–1.08)

356 (54%)/410 (65%)

0.873 (− 1.8)/0.872 (− 1.9)

+

7

97 (− 1.2 SD)/103 (− 1.3 SD)

Cessation of premature teeth loss

Improvement of X ray finding

113/4051

1938/152 (16.2–57.4)

33/72.6 (8.8–28.0)

58.7/2.1 (1.6–3.3)

0.16/0.09 (0.08–1.08)

− 

0.362 (N.R.)/0.330 (N.R.)

+

8

155 (− 2.5 SD)/157 (− 2.4 SD)

6MWT improvement

Disappearance of kidney calcification

103/44368

−/37.1 (N.R.)

−/185.5 (N.R.)

− /0.2 (N.R.)

0.05/0.015 (0.08–1.08)

463 (67%)/560 (81%)

0.685 (− 3.8)/0.684 (− 4.0)

+

9

103 (− 2.4 SD)/119 (− 2.3 SD)a

Alleviation of fatigue

Growth in height

157/25634

−/15.7 (16.2–57.4)

−/34.3 (8.8–28.0)

−/0.5 (1.9–5.3)

0.12/0.09 (0.08–1.08)

300 (57%)/−

0.478 (N.R.)/0.626 (− 1.5)

+

10

35 (− 6.5 SD)/73 (− 4.8 SD)

Respiratory condition improvement

Growth in height

8/17720

−/27 (N.R.)

−/37.6 (N.R.)

−/0.7 (N.R.)

−/0.29 (0.08–1.08)

−/0.249 (N.R.)

+

  1. Values before the slash indicate the values before the start of AA treatment, and after the slash indicate the values after the start of AA treatment
  2. ALP, alkaline phosphatase; AA, asfotase alfa; N.R., no reference; PEA, phosphatidylethanolamine; PL, pyridoxal, PLP, pyridoxal phosphate; 6MWT, 6-min walk test
  3. aThe height of patient 9 was measured at the age of 6 years 3 months before restarting AA treatment for a second time