Pronostic and Therapeutic Consequences of Gsα Mutations in Somatotroph Adenomas1
Pronostic and Therapeutic Consequences of Gsα Mutations in Somatotroph Adenomas1
复制标题
生长激素细胞腺瘤中 Gsα 突变的前额和治疗后果1
DOI:
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
P. Jaquet
中科院分区:
文献类型:
--
作者:
A. Barlier;G. Gunz;Alfredo J. Zamora;I. Morange;D. Figarella;Henri Dufour;A. Enjalbert;P. Jaquet
Human pituitary somatotroph adenomas can be associated with mutations of the s alpha-subunit of G proteins. However, the impact of the gsp mutations on the tumoral phenotype is not well understood at present. This study aims to determine whether the detection of this mutation could impact on the management of acromegalic patients. We examined 30 acromegalic patients; 8 were gsp positive, and 22 were gsp negative. The gsp-positive adenomas appeared to secrete significantly more when the ratio of basal GH level/tumor size was considered. A better octreotide sensitivity of mutated adenomas was clearly shown under in vivo (short and long term) and in vitro conditions. During the acute octreotide test, the GH nadir was significantly lower in the gsp-positive adenomas (85% of maximal inhibition vs. 52%). Eighteen patients were treated with octreotide (300 micrograms/day) for at least 3 months before surgery: the percent inhibition of GH hypersecretion was higher in gsp-positive adenomas (76% vs. 47%). In cell culture, the octreotide-induced inhibition of GH release was significantly higher in gsp-positive adenomas (71% vs. 30%). Finally, during 2 yr of postoperative follow-up, GH hypersecretion was controlled in all patients with gsp mutation even in those in whom tumoral tissue remained after surgery. On the contrary, in the gsp-negative group, octreotide treatment was unable to control hypersecretion in 4 patients bearing tumoral remnants. The Gs alpha mutation could, therefore, be a new marker to foresee the susceptibility of the tumor to be controlled by somatostatin analogs, which improves prognosis.
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DOI:
10.1210/mend.9.7.7476961
发表时间:
1995
期刊:
Molecular endocrinology (Baltimore, Md.)
影响因子:
--
作者:
Bertherat,J;Chanson,P;Montminy,M
通讯作者:
Montminy,M
影响因子:
--
作者:
X. Yang;F. Lee;G. Wand
通讯作者:
X. Yang;F. Lee;G. Wand
DOI:
10.1210/jcem.75.3.1517386
发表时间:
1992
期刊:
The Journal of clinical endocrinology and metabolism
影响因子:
--
作者:
Harris,PE;Alexander,JM;Bikkal,HA;Hsu,DW;Hedley-Whyte,ET;Klibanski,A;Jameson,JL
通讯作者:
Jameson,JL
DOI:
10.1210/jcem-67-5-958
发表时间:
1988
期刊:
The Journal of clinical endocrinology and metabolism
影响因子:
--
作者:
Kelijman,M;Williams,TC;Downs,TR;Frohman,LA
通讯作者:
Frohman,LA
影响因子:
4.8
作者:
Gaiddon,C;Tian,J;Loeffler,JP;Bancroft,C
通讯作者:
Bancroft,C