| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
Clinical Studies |
Service de Pédiatrie Endocrinologie, Centre, Hospitalier Universitoine, Purpan, F-31059 Toulouse Cedex, France
Address all correspondence and requests for reprints to: Maïthé Tauber, Service de Pédiatrie Endocrinologie, CHU Purpan, Place Baylac, F-31059 Toulouse Cedex, France.
| Abstract |
|---|
|
|
|---|
| Introduction |
|---|
|
|
|---|
The problem of diagnosing GHD now extends to adulthood, because GHD in adults with childhood or late-onset deficiency has been shown to significantly increase mortality and morbidity (7, 8, 9, 10, 11). In the absence of GH, body mass index (BMI) increased, body composition was modified with an elevated waist/hip ratio, metabolic disorders such as syndrome X were reported, and muscle strength, myocardial efficiency, and bone mineral density were altered. All the abnormal parameters are corrected by GH after either short- or long-term treatment (11, 12, 13, 14, 15).
The incidence and prevalence of adult-onset GHD can be easily evaluated because the majority of cases (about 85%) occur after pituitary surgery. However, the proportion of adults with childhood-onset GHD (those patients who should continue GH treatment after the end of somatic growth) is not known. It thus appears very important to clarify this point. There is little data in the literature on GH state together with auxological data in GHD patients just after completion of GH treatment. For these reasons, we decided to systematically retest patients at the end of GH treatment, and we report here the data of 131 patients treated with GH in our department during the last 14 yr.
| Subjects and Methods |
|---|
|
|
|---|
The mean dose of GH was that given in France by France Hypophyse during the last 15 yr and ranged from 0.40.6 IU/kg per week.
Table 1
summarizes auxological data: mean chronological
age was 16.7 ± 1.7 yr (17.6 ± 1.4 yr for boys and 15.3
± 1.3 yr for girls), mean bone age 14.8 ± 2.0 yr (15.3 ±
2.0 for boys and 14.2 ± 3.0 for girls), mean BMI was 20 ±
2. Mean duration of treatment was 3.7 ± 2.1 yr, and mean
SDS for height increased from -2.7 ± 1.0
SDS before treatment to -1.5 ± 1.0 SDS
at the end of treatment.
|
Before treatment, 33 children (11 girls, 22 boys) were classified as complete GHD because they had two abnormal GH peaks below 5 µg/L after two different stimulation tests. Ninety-eight children (41 girls, 57 boys) were classified as partial GHD because they had either two low GH peaks between 5 and 10 µg/L after stimulation tests (n = 74) or one abnormal test below 10 µg/L and low 24-h GH secretion with an integrated concentration below 2.5 µg/L/min (n = 24). Ten percent of organic GHD patients had partial GHD and 90% had complete GHD. Eighty percent of idiopathic GHD patients had partial GHD and 20% had complete GHD. The ratio between complete and partial GHD did not significantly differ between prepubertal (n = 58) and pubertal (n = 73) patients at the start of treatment. Various stimulation tests were performed either with a single stimulus: ornithine (n = 17), L-dopa (n = 40, clonidine (n = 3), arginine (n = 45), or glucagon (n = 1) or with combined stimuli: clonidine and betaxolol (n = 99), insulin and arginine (n = 13), glucagon and propanolol (n = 10), or glucagon and betaxolol (n = 8). Only a small number of patients were primed with sex steroids before therapy.
During the first year following the discontinuation of therapy and at least 15 days after the last GH injection, each patient came to the day hospital unit for a single GH stimulation test that used clonidine and betaxolol as pharmacological stimuli. This test was the most commonly used test in our department for practical reasons, and most patients had been tested with it before treatment (n = 99).
Hormonal dosages
GH dosage. Kits were purchased from Cis Oris (Cis BioInternational, Gif-sur-Yvette, France) throughout the study. The method changed in 1987 from RIA to immunoradiometric assay. The laboratory compared the values obtained with both methods at this time, and the results were satisfactory. With RIA, the intraassay coefficient of variation (CV) ranged from 7.69.2%, and the interassay CV ranged from 11.013.7%. With the immunoradiometric assay, the intraassay CV ranged from 2.32.8%, and interassay CV ranged from 3.24.4%. All the GH dosages at retesting were performed with the same method.
IGF-I dosage. Kits were purchased from the same manufacturer (Mallinckrodt, Medica, Evry, France), and the same method was used for all sera at retesting.
Statistical analysis
We used Pearsons
2 and Yates or Fisher tests
for qualitative variables. For quantitative variables, means were
compared using covariance analysis to control confounding factors.
| Results |
|---|
|
|
|---|
Mean value for the group was 14.4 ± 10.0 µg/L (range 0.249.5 µg/L). Thirty patients had a blunted response below 5 µg/L (23%), 19 patients had a partially blunted response between 5 and 10 µg/L (15%), and 82 patients had a normal GH peak above 10 µg/L (62%).
Of the 10 patients with organic GHD, only 1 (10%) had a normal GH
peak, and 9 still had a low GH peak below 5 µg/L. Conversely, a large
majority (67%) of idiopathic GHD patients had a peak above 10 µg/L,
16% had a peak between 5 and 10 µg/L, and 17% had a peak less than
5 µg/L. Data are presented in Fig. 1
.
|
|
Of the 22 boys with complete GHD, 15 (68%) had a low GH peak and 7 (32%) had a normal test. In the 57 boys with partial GHD, 16 (28%) had a low GH peak and 41 (72%) had a normal test. Therefore 60% of the boys (n = 48) had a normal GH peak, which was not statistically different from the results obtained in girls (64%) and in the group as a whole (62%).
Pubertal stage. Of the 58 children who were prepubertal when starting treatment, 14 (24%) had complete GHD, of whom 10 (72%) still had a low GH peak. In the 44 partial GHD patients, 12 (27%) still had a low GH peak. Therefore 36 (60%) of the 58 children who were prepubertal before treatment had a normal GH test. Of the 73 children who were pubertal at the start of treatment, 19 (26%) had complete GHD, 11 of whom (58%) still had a low GH peak. In the 54 with partial GHD, 16 (30%) still had a low GH peak. Therefore, 63% of the 73 pubertal children had a normal GH test after treatment, which is not statistically different from the result obtained in the group of prepubertal children.
BMI state. When starting treatment, only 14 patients were obese, with a BMI above the 97th percentile, and 8 of those (57%) had complete GHD and 6 (75%) had a low GH peak after completion of treatment. Of the 6 patients with partial GHD, 4 (67%) still had a GH-deficient test. Therefore, at the end of treatment 4/14 (29%) normalized their GH test, which was significantly lower than the result of the whole group (P < 0.001). Only 2/14 remained obese, and these two patients had a GH peak below 5 µg/L. Before treatment, GH peak was also significantly lower (P < 0.001) in the group of obese children than in the nonobese children. Moreover, serum IGF-I levels were obtained in 12 of the 14 patients before treatment and 7 had low values, suggesting that the blunted GH response was not caused by their obesity but related to GHD.
IGF-I plasma levels. We measured IGF-I levels in 119 patients at retesting. The mean value was 358 ± 193 ng/mL and ranged from 371149 ng/mL. GH peak at retesting was positively correlated with IGF-I levels (P < 0.02). IGF-I levels were lower in patients with persistent GHD than in those who normalized their GH peak. The difference was more marked in patients with complete GHD (P < 0.001) than in patients with partial GHD (P < 0.004). Conversely, there was no significant difference in IGF-I values between patients with persistent complete GHD and those with partial GHD.
Auxological data
In the 33 patients with complete GHD, mean SDS gain for height was +1.6 ± 1.1 SDS for a mean duration of therapy of 4.3 ± 3.1 yr. We did not find a significant difference in SDS gain between those who normalized their test (n = 12) and those who did not (n = 21) (1.6 ± 0.6 vs. 1.7 ± 1.3 SDS).
In the 98 patients with partial GHD, mean SDS gain for height was 1.1 ± 0.7 SDS for a mean duration of therapy of 3.6 ± 1.7 yr. Again, we did not find a significant difference in SDS gain between those who had a normal test (n = 70) and those who did not (n = 28) (1.1 ± 0.8 vs. 1.2 ± 0.9).
However, patients with complete GHD grew significantly better
(P < 0.01) than patients with partial GHD. Boys grew
significantly better than girls (P < 0.05): 1.4
± 0.8 SDS for a duration of 3.8 ± 2.2 yr
vs. 1.1 ± 0.7 SDS for a duration of 3.6 ± 2.0
yr. Data are summarized in Table 2
.
|
| Discussion |
|---|
|
|
|---|
Other criteria of GHD such as plasma IGF-I or IGFBP-3 evaluation could be of interest. It has been documented in adults that serum IGF-I and IGFBP-3 are useful diagnostic tests in identifying young adults with severe GH deficiency if there is a sufficiently large number of age and sex-matched controls (20, 21).
The correlation we found between GH peak and IGF-I levels and the significant difference between the patients who had persistent GHD and those who normalized their test is an argument in favor of transient GHD. Unfortunately, we do not have IGF-I values before treatment or any IGFBP-3 data. Nevertheless, our study helps to predict approximately the number of patients who should continue GH treatment in adulthood. In France, it has been decided that patients should continue treatment if the GH peak is lower than 3 µg/L at retesting. In our series, 23% had complete GHD with a GH peak below 5 µg/L at the end of GH treatment and 14% had a GH peak lower than 3 µg/L. Half of the patients with complete GHD when starting treatment would need to continue GH therapy compared with 14% of partial GHD patients.
This point has been poorly documented in the literature. In one study of 34 patients (22), 19 patients with postirradiation GHD continued to have complete GHD with a GH peak lower than 3.5 µg/L, whereas of 15 idiopathic GH patients, only 26% remained GH deficient. A recent study (23) of 69 adult patients diagnosed as GH deficient in childhood (54 idiopathic GHD, 15 organic), retested by using GHRH + pyridostigmine, found that 57% had persistent GHD with a GH peak below 10 µg/L, of whom 52% had a GH peak below 5 µg/L. In most studies, however, the percentage of patients with complete or partial GHD before treatment is not stated, and this could account for the difference observed. Another study (16) of 50 men (17 with isolated GH deficiency, 33 with multiple pituitary hormone deficiencies) 1.015.5 yr after discontinuation of GH therapy for childhood-onset GHD found 100% persistent GHD (GH peak below 7 µg/L) using GHRH or the insulin tolerance test (24).
The auxological data in our study are also interesting, reflecting our strategy of diagnosis and treatment of GHD during the last 14 yr. The sex ratio was 79 boys/52 girls, age at start of treatment was too high, and the mean duration of treatment was significantly different in boys as compared with girls, probably because of the poorer results obtained in the girls. There was no difference in response to GH therapy related to peak GH response after therapy, except for those with GHD before treatment, who grew significantly better than patients with partial GHD.
In conclusion, it is important to retest GHD patients after completion of GH treatment because retesting shows that approximately one-quarter of these patients will need GH treatment in adulthood. This result has to be explained to the families and the patients. It will be of interest to retest all these patients after 1 yr when they return to the department to check their adult height.
| Acknowledgments |
|---|
Received July 23, 1996.
Revised September 17, 1996.
Revised October 16, 1996.
Accepted October 16, 1996.
| References |
|---|
|
|
|---|
This article has been cited by other articles:
![]() |
V Gasco, G Corneli, G Beccuti, F Prodam, S Rovere, J Bellone, S Grottoli, G Aimaretti, and E Ghigo Retesting the childhood-onset GH-deficient patient Eur. J. Endocrinol., December 1, 2008; 159(suppl_1): S45 - S52. [Abstract] [Full Text] [PDF] |
||||
![]() |
G. Corneli, C. Di Somma, F. Prodam, J. Bellone, S. Bellone, V. Gasco, R. Baldelli, S. Rovere, H. J. Schneider, L. Gargantini, et al. Cut-off limits of the GH response to GHRH plus arginine test and IGF-I levels for the diagnosis of GH deficiency in late adolescents and young adults Eur. J. Endocrinol., December 1, 2007; 157(6): 701 - 708. [Abstract] [Full Text] [PDF] |
||||
![]() |
G. Gelwane, C. Garel, D. Chevenne, P. Armoogum, D. Simon, P. Czernichow, and J. Leger Subnormal Serum Insulin-Like Growth Factor-I Levels in Young Adults with Childhood-Onset Nonacquired Growth Hormone (GH) Deficiency Who Recover Normal GH Secretion May Indicate Less Severe but Persistent Pituitary Failure J. Clin. Endocrinol. Metab., October 1, 2007; 92(10): 3788 - 3795. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. di Iorgi, A. Secco, F. Napoli, C. Tinelli, A. Calcagno, N. Fratangeli, L. Ambrosini, A. Rossi, R. Lorini, and M. Maghnie Deterioration of Growth Hormone (GH) Response and Anterior Pituitary Function in Young Adults with Childhood-Onset GH Deficiency and Ectopic Posterior Pituitary: A Two-Year Prospective Follow-Up Study J. Clin. Endocrinol. Metab., October 1, 2007; 92(10): 3875 - 3884. [Abstract] [Full Text] [PDF] |
||||
![]() |
S. Zucchini, P. Pirazzoli, F. Baronio, M. Gennari, M. O. Bal, A. Balsamo, S. Gualandi, and A. Cicognani Effect on Adult Height of Pubertal Growth Hormone Retesting and Withdrawal of Therapy in Patients with Previously Diagnosed Growth Hormone Deficiency J. Clin. Endocrinol. Metab., November 1, 2006; 91(11): 4271 - 4276. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Maghnie, L. Ambrosini, M. Cappa, G. Pozzobon, L. Ghizzoni, M. G. Ubertini, N. di Iorgi, C. Tinelli, S. Pilia, G. Chiumello, et al. Adult Height in Patients with Permanent Growth Hormone Deficiency with and without Multiple Pituitary Hormone Deficiencies J. Clin. Endocrinol. Metab., August 1, 2006; 91(8): 2900 - 2905. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. E. Molitch, D. R. Clemmons, S. Malozowski, G. R. Merriam, S. M. Shalet, M. L. Vance, and for The Endocrine Society's Clinical Guidelines Su Evaluation and Treatment of Adult Growth Hormone Deficiency: An Endocrine Society Clinical Practice Guideline J. Clin. Endocrinol. Metab., May 1, 2006; 91(5): 1621 - 1634. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Maghnie, G. Aimaretti, S. Bellone, G. Bona, J. Bellone, R. Baldelli, C. de Sanctis, L. Gargantini, R. Gastaldi, L. Ghizzoni, et al. Diagnosis of GH deficiency in the transition period: accuracy of insulin tolerance test and insulin-like growth factor-I measurement Eur. J. Endocrinol., April 1, 2005; 152(4): 589 - 596. [Abstract] [Full Text] [PDF] |
||||
![]() |
J. Leger, S. Danner, D. Simon, C. Garel, and P. Czernichow Do All Patients with Childhood-Onset Growth Hormone Deficiency (GHD) and Ectopic Neurohypophysis Have Persistent GHD in Adulthood? J. Clin. Endocrinol. Metab., February 1, 2005; 90(2): 650 - 656. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Lange, U. Feldt-Rasmussen, O. L. Svendsen, K. W. Kastrup, A. Juul, and J. Muller High Risk of Adrenal Insufficiency in Adults Previously Treated for Idiopathic Childhood Onset Growth Hormone Deficiency J. Clin. Endocrinol. Metab., December 1, 2003; 88(12): 5784 - 5789. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Tauber, B. Jouret, A. Cartault, N. Lounis, M. Gayrard, C. Marcouyeux, C. Pienkowski, I. Oliver, P. Moulin, P. Otal, et al. Adolescents with Partial Growth Hormone (GH) Deficiency Develop Alterations of Body Composition after GH Discontinuation and Require Follow-Up J. Clin. Endocrinol. Metab., November 1, 2003; 88(11): 5101 - 5106. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Tauber, B. Berro, V. Delagnes, N. Lounis, B. Jouret, C. Pienkowski, I. Oliver, and P. Rochiccioli Can Some Growth Hormone (GH)-Deficient Children Benefit from Combined Therapy with Gonadotropin-Releasing Hormone Analogs and GH? Results of a Retrospective Study J. Clin. Endocrinol. Metab., March 1, 2003; 88(3): 1179 - 1183. [Abstract] [Full Text] [PDF] |
||||
![]() |
P. Saenger Growth hormone in growth hormone deficiency BMJ, July 13, 2002; 325(7355): 58 - 59. [Full Text] [PDF] |
||||
![]() |
M. E. Molitch Diagnosis of GH Deficiency in Adults--How Good Do the Criteria Need to Be? J. Clin. Endocrinol. Metab., February 1, 2002; 87(2): 473 - 476. [Full Text] [PDF] |
||||
![]() |
R. Coutant, S. Rouleau, F. Despert, N. Magontier, D. Loisel, and J.-M. Limal Growth and Adult Height in GH-Treated Children with Nonacquired GH Deficiency and Idiopathic Short Stature: The Influence of Pituitary Magnetic Resonance Imaging Findings J. Clin. Endocrinol. Metab., October 1, 2001; 86(10): 4649 - 4654. [Abstract] [Full Text] [PDF] |
||||
![]() |
W. M. Drake, S. J. Howell, J. P. Monson, and S. M. Shalet Optimizing GH Therapy in Adults and Children Endocr. Rev., August 1, 2001; 22(4): 425 - 450. [Abstract] [Full Text] [PDF] |
||||
![]() |
J. W. Finkelstein, D. E. Rusovici, E. Green, S. Foreman, H. E. Kulin, M. R. D'Arcangelo, and R. Kemezys Children with Organic Growth Hormone Deficiency Have Elevated Cortisol Responses to Stimuli J. Clin. Endocrinol. Metab., June 1, 2001; 86(6): 2854 - 2856. [Abstract] [Full Text] [PDF] |
||||
![]() |
A. S. MartÍnez, H. M. Domené, M. G. Ropelato, H. G. Jasper, P. A. Pennisi, M. E. Escobar, and J. J. Heinrich Estrogen Priming Effect on Growth Hormone (GH) Provocative Test: A Useful Tool for the Diagnosis of GH Deficiency J. Clin. Endocrinol. Metab., November 1, 2000; 85(11): 4168 - 4172. [Abstract] [Full Text] |
||||
![]() |
G. Aimaretti, C. Baffoni, S. Bellone, L. Di Vito, G. Corneli, E. Arvat, L. Benso, F. Camanni, and E. Ghigo Retesting Young Adults with Childhood-Onset Growth Hormone (GH) Deficiency with GH-Releasing-Hormone-Plus-Arginine Test J. Clin. Endocrinol. Metab., October 1, 2000; 85(10): 3693 - 3699. [Abstract] [Full Text] |
||||
![]() |
D. B. Allen Issues in the Transition From Childhood to Adult Growth Hormone Therapy Pediatrics, October 1, 1999; 104(4): 1004 - 1010. [Abstract] [Full Text] |
||||
![]() |
M. Maghnie, C. Strigazzi, C. Tinelli, M. Autelli, M. Cisternino, S. Loche, and F. Severi Growth Hormone (GH) Deficiency (GHD) of Childhood Onset: Reassessment of GH Status and Evaluation of the Predictive Criteria for Permanent GHD in Young Adults J. Clin. Endocrinol. Metab., April 1, 1999; 84(4): 1324 - 1328. [Abstract] [Full Text] |
||||
![]() |
G. P. August Symposium on Controversies in the Diagnosis of Growth Hormone Deficiency Pediatrics, August 1, 1998; 102(2): 517 - 517. [Full Text] |
||||
![]() |
S. M. Shalet, A. Toogood, A. Rahim, and B. M. D. Brennan The Diagnosis of Growth Hormone Deficiency in Children and Adults Endocr. Rev., April 1, 1998; 19(2): 203 - 223. [Abstract] [Full Text] |
||||
![]() |
R. Coutant, J.-C. Carel, M. Letrait, C. Bouvattier, P. Chatelain, J. Coste, and J.-L. Chaussain Short Stature Associated with Intrauterine Growth Retardation: Final Height of Untreated and Growth Hormone-Treated Children J. Clin. Endocrinol. Metab., April 1, 1998; 83(4): 1070 - 1074. [Abstract] [Full Text] |
||||
![]() |
H. de Boer and E. A. van der Veen Why Retest Young Adults with Childhood-Onset Growth Hormone Deficiency? J. Clin. Endocrinol. Metab., July 1, 1997; 82(7): 2032 - 2036. [Full Text] [PDF] |
||||
![]() |
R. G. Rosenfeld and M. D. Is Growth Hormone Deficiency a Viable Diagnosis? J. Clin. Endocrinol. Metab., February 1, 1997; 82(2): 349 - 351. [Full Text] [PDF] |
||||
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| Endocrinology | Endocrine Reviews | J. Clin. End. & Metab. |
| Molecular Endocrinology | Recent Prog. Horm. Res. | All Endocrine Journals |