The impact of chemotherapy on Leydig cell function in long term survivors of germ cell tumors.

Abstract:

BACKGROUND:Because patients with germ cell tumors expect an additional life span of around 50 years after successful treatment, attention is now focused on potential long term toxicity. Limited data are available on Leydig cell function in long term survivors. METHODS:The authors measured testosterone, sex hormone binding-globulin (SHBG), luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels in 244 patients with germ cell tumors. Patients were divided into three groups: Group 1 had received no chemotherapy (n = 58 patients), Group 2 had received cumulative doses of cisplatin < or = 400 mg/m(2) (n = 117 patients), and Group 3 had received cumulative doses of cisplatin > 400 mg/m(2) (n = 69 patients). The median times from chemotherapy were 74 months and 75 months in Groups 2 and 3, respectively. RESULTS:Subnormal testosterone levels (< 10 nmol/L) were found in 5%, 11%, and 20% in Groups 1, 2, and 3, respectively (Group 1 vs. Group 3; P = 0.02). The mean testosterone level and the testosterone/SHBG ratio did not differ significantly between Groups 1 and 2; however, they did differ between Groups 1 and 3 (testosterone: 17.0 nmol/L vs. 14.9 nmol/L, respectively; P = 0.02; testosterone/SHBG ratio: 0.70 vs. 0.59; P < 0.05). There was a significant inverse correlation between the testosterone/SHBG ratio and LH (correlation coefficient [r] = -0.25; P = 0.0002). A significant positive correlation was found for LH and FSH (r = 0.78; P < 0.0001), indicating a strong association between Leydig cell dysfunction and germinal epithelial damage. CONCLUSIONS:Standard doses of cisplatin-based chemotherapy do not lead to a significant deterioration of Leydig cell function in long term survivors of germ cell tumors. In contrast, high cumulative doses of chemotherapy cause a significant and persistent impairment of Leydig cell function. More data are needed regarding the clinical relevance of moderate testosterone deficiency. Further research is necessary to determine whether some patients may benefit from testosterone replacement.

journal_name

Cancer

journal_title

Cancer

authors

Gerl A,Mühlbayer D,Hansmann G,Mraz W,Hiddemann W

doi

10.1002/1097-0142(20010401)91:7<1297::aid-cncr1132

subject

Has Abstract

pub_date

2001-04-01 00:00:00

pages

1297-303

issue

7

eissn

0008-543X

issn

1097-0142

pii

10.1002/1097-0142(20010401)91:7<1297::AID-CNCR1132

journal_volume

91

pub_type

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