Table 1 Patient main characteristics.

From: MTHFR and ABCB1 polymorphisms associated with toxicity in hematological malignancies patients receiving high dose methotrexate

Patient

n(%)

Gender

Male

46(41.44)

Female

65(58.56)

Disease

 

ALL

71(63.96)

BL

5(4.50)

PCNSL

25(22.53)

DLBCL

8(7.21)

ENKTCL

2(1.80)

Complication

Endocrine system diseases

51(45.95)

Cardiovascular system diseases

44(39.64)

Nervous system disease

28(25.23)

 Genotyping and dosage of MTX

 MTHFR C677T

  CC (1516-5320 mg)

23(20.72)

  CT (1400-8000 mg)

55(49.55)

  TT (1730-9300 mg)

33(29.73)

 MTHFR A1298C

  AA (1400-9300 mg)

92(82.88)

  AC (1500-5850 mg)

16(14.41)

  CC (2000-6000 mg)

3(2.71)

 ABCB1 C3435T

  CC (1500-6000 mg)

41(36.94)

  CT (1500-8000 mg)

53(47.75)

  TT (1400-9300 mg)

17(15.31)

Toxicity and occurrence time after MTX treatment

Hematopoietic toxicity (5.3 ± 12.7 days)

79(71.17)

Hepatic toxicity and Renal toxicity (3.8 ± 7.6 days)

86(77.48)

Gastrointestinal toxicity (3.1 ± 6.2 days)

33(29.73)

Mucositis (6.0 ± 8.5 days)

22(19.82)

Treatment course when the toxicity occurred

Hematopoietic toxicity (1.2 treatment courses)

 

Hepatic toxicity and Renal toxicity (1.3 treatment courses)

 

Gastrointestinal toxicity (1.5 treatment courses)

 

Mucositis (1.8 treatment courses)

 
  1. Note: ALL: Acute lymphoblastic leukemia, BL: Burkitt’s lymphoma, PCNSL: Primary central nervous system lymphoma, DLBCL: Diffuse large B-cell lymphoma, ENKTCL: Extranodal NK/T-cell lymphoma.