Patient Number/ Reference | Age onset (years) | Neurological Presentation | Ovarian Function | Metabolic disturbance | Mutated Gene in EIF2B | Mutation on Genomic DNA | Amino Acid Change | ||
---|---|---|---|---|---|---|---|---|---|
Motor Dysfunction | Cognitive Dysfunction | Other Symptoms | |||||||
23 | Gait instability Bilateral Babinski sign | IQ = 7 Visuo-spatial deficits | – | Primary amenorrhea | – | EIF2B4 | C1393T C1465T | C465R Y489H | |
24 | Facial-oral-hand apraxia | IQ = 52 Frontal lobe deficits | Seizures | Delayed menarche | Obesity Hyperlipidemia | EIF2B4 | C1393T C1465T | C465R Y489H | |
29 | Cerebellar and pyramidal deficits | Normal IQ | Dysarthria | Primary amenorrhea | – | EIF2B2 | C547T A638G | R183stopE213G | |
4 [11] | 33 | Gait instability | IQ = 60 Executive deficits | – | Secondary amenorrhea at 26 | – | EIF2B2 | C512T 60712del/insTG | S171F M203 fs |
5 [11] | 16 | – | IQ not evaluated | Delayed speech | – | – | EIF2B2 | C547T A638G | R183stopE213G |
6 [11] | 31 | Gait instability | IQ not evaluated | Anxiety and depression | Secondary amenorrhea at 27 | Â | EIF2B5 | G338A | R113H |
7 [11] | 48 | Gait instability | MMSE = 21/30 | Seizures | Secondary amenorrhea at 31 | – | EIF2B5 | G338A | R113H |
8 [11] | 16 | Gait instability | IQ = 96 | – | Primary amenorrhea | – | EIF2B5 | G338A C538T | R113H R195C |
9 [13] | 46 | Gait slowness | MMSE = 17/30’ Executive deficits | Apathy | – | – | EIF2B5 | C545T C1340T | T182 M S447 L |
29 | – | – | Aphasia Paresthesias | Secondary Amenorrhea at 20 | All metabolite reduction | EIF2B3 | C260T G272A | A87V A91H | |
11 [16] | 56 | Hands clumsiness Gait instability | Memory deficits | – | Secondary amenorrhea at 37 | – | EIF2B2 | T254A | V85E |
12 [16] | 53 | Gait instability | Miscalculation | – | Secondary amenorrhea at 28. | – | EIF2B5 | G808C | D270H |
13 [16] | 30 | Left leg weakness | – | Left hemianopia | – | – | EIF2B3 | T80A | L27Q |
14 [17] | 17 | Gait slowness Cerebellar ataxia | IQ = 73 | – | Secondary amenorrhea at 32 | Hypogonadism | EIF2B2 | A638G | E213G |
15 [18] | 66 | Spastic paraparesis Brisk reflexes Babinski sign | Visuo-spatial memory deficits | – | Premature amenorrhea | – | EIF2B3 | C260T | A87V |
16 [19] | 61 | Incoordination Spastic paraparesis | IQ = 66 | Seizures | – | – | EIF2B1 | T715G | F239 V |
17 [20] | 17 | Tremors Paresis | Mild cognitive deficits | Dysarthria paresthesia | – | – | EIF2B5 | G338A | R113H |
18 [21] | 52 | Spastic gait Brisk tendon reflexes | IQ = 51 MMSE = 15/30 Memory deficits | Emotional instability | Secondary amenorrhea at 31 | Obesity Hyperlipidemia | EIF2B5 | C545T | T182 M |
35 | Cerebellar ataxia | MMSE = 23/30 | – | Primary amenorrhea | Obesity Hyperlipidemia | EIF2B5 | G338A | R113H | |
33 | Pyramid dysfunction | – | Seizures | Secondary amenorrhea at 30 | – | EIF2B5 | G338A | R113H | |
21 [25] | 23 | – | – | Seizures | Infertility | Obesity Hyperlipidemia | EIF2B2 | A638G A818G | E213G K273H |
52 | Cerebellar ataxia | MMSE = 25/30 | Seizures | – | Hyperlipidemia | EIF2B5 | G338A | R113H | |
55 | Spastic paraparesis | – | – | Delayed menarche | – | EIF2B5 | G338A | R113H | |
37 | Spastic paraparesis Cerebellar ataxia | – | – | Primary amenorrhea | – | EIF2B5 | G338A | R113H | |
44 | Spastic paraparesis | MMSE = 27/30 | – | – | – | EIF2B5 | G584A A1448G | A195H T483C | |
41 | Spastic paraparesis Cerebellar ataxia | MMSE = 21/30 | Seizures | – | – | EIF2B5 | A641G C805T | H214A A269X | |
38 | Tremors Paresis | MMSE = 10/30 | Seizures | Secondary amenorrhea at 35 | – | EIF2B5 | G338A | R113H | |
39 | Spastic paraparesis | MMSE = 4/30 | Seizures | Secondary amenorrhea at 21 | – | EIF2B5 | G338A | R113H | |
39 | Cerebellar ataxia | – | – | Secondary amenorrhea at 18 | – | EIF2B5 | G338A | R113H | |
30 [26] | 19 | – | – | Seizures paresthesia | Primary amenorrhea | Hypoglycemia | EIF2B5 | C869A A913T | A299H M305 L |
31 [27] | 59 | Spastic paraparesis Babinski sign | IQ = 60 MMSE = 16/30 | – | – | – | EIF2B4 | T617C A952G | M206 T I318V |
32 [28] | 30 | Weakness and spastic in left limb | Normal IQ and MMSE | – | Secondary amenorrhea at 25 | – | EIF2B4 | – | – |
33 (the present patient) | 25 | Tremors Babinski sign | IQ = 81MMSE = 24 Miscalculation Memory deficits | – | Menometrorrhagia | Obesity, hypoglycemia, hypertriglyceridemia | EIF2B2 | T254A A496G | V85E M166 V |