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Table 4 Enzyme activity in plasma (nmol/ml/min) and result of mutation analysis

From: Clinical presentation and outcome in infantile Sandhoff disease: a case series of 25 patients from Iranian neurometabolic bioregistry with five novel mutations

Patient No

Hexosaminidase A

Hexosaminidase B

Hexosaminidase AB

Mutations

Novel mutations

1

0.27

0.09

1.00

c.1602C > A (p.Cys534Ter)

+

2

0.18

0.00

0.5

c.833C > T (P.Ala278Val)

+

3

0.23

0.03

0.72

c.850C > T (p.Arg284Ter)

Zampieri 2009 [19]

4

0.12

0.78

0.46

c.1641_1657del

+

5

0.25

0.62

1.88

6

0.13

0.04

0.5

c.833C > T(p.Ala278val)

+

7

0.18

0.02

0.57

8

0.06

0.02

0.00

9

0.16

0.00

0.2

10

0.18

0.10

0.03

11

0.06

0.33

0.2

12

0.1

0.8

0.5

 

13

0.15

0.03

0.53

c.668_669 + 4dupTGGTAA

+

14

0.07

0.52

0.3

15

0.28

0.00

0.6

16

0.03

0.01

0.01

17

0.26

0.42

1

18

0.01

0.01

0.06

c.1538 T > c(rs778501777;p.leu513pro)

Lee et al. 2017 [7]

19

0.16

0.00

0.41

c.850 > T (p.Arg284Ter)

Zampieri 2009 [19]

20

0.16

0.00

0.67

21

0.21

0.03

0.98

22

0.08

0.00

0.3

23

0.20

0.10

0.6

24

0.04

0.19

0.00

25

0.23

0.00

0.8

  1. Normal range of Hexosaminidase A: (0.96–1.78); Hexosaminidase B: (5.76–15.77); Hexosaminidase AB: (18.59–31.33)