|
21. |
Isolated Growth Hormone Deficiency Type IA Associated with a 45‐Kilobase Gene Deletion within the Human Growth Hormone Gene Cluster in an Italian Family |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 654-658
LUCIA,
GHIZZONI PHILIPPE,
DUQUESNOY TONI,
TORRESANI ALESSANDRA,
VOTTERO MICHEL,
GOOSSENS SERGIO,
Preview
|
PDF (551KB)
|
|
摘要:
An Italian family with three children presenting with isolated growth hormone (GH) deficiency type IA is described. Restriction endonuclease analysis revealed that the cause of hGH deficiency was a 45-kb gene deletion within the hGH-chorionic somatomammotropin (CS) gene cluster, encompassing the GH-1, CS-L, CS-A, and GH-2 genes. DNA sequence analysis and polymerase chain reaction amplification between two sequences located on each side of the deletion breakpoint accurately identified the deletion breakpoints and indicated that the regulatory sequences located upstream from the TATA box of the mutant CS-B belong to the GH-2 gene. Two of the affected children developed high-titer anti-hGH antibodies after recombinant hGH treatment with secondary growth arrest, whereas the third one maintained normal growth in the presence of very low-titer antibodies. This is the first report of a large deletional mutation within the hGH-CS gene cluster accompanied by phenotypic heterogeneity in terms of growth response and antibody formation in the different patients.
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
22. |
The Society for Adolescent Medicine Annual Meeting |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 659-659
&NA;,
Preview
|
PDF (60KB)
|
|
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
23. |
Evidence of a Steroidogenic Enzyme Gene Dose Effect on Adrenal Gene Expression in Hereditary Rabbit Congenital Adrenal Hyperplasia |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 660-666
KOTARO IWAMOTO,
XIMING YANG,
FRASER ROGERSON,
J. MASON,
JAMES ARTWOHL,
KRISTINE BOLIN,
PAUL KLIMAH,
PIETER SWART,
SONGYA PANG,
Preview
|
PDF (759KB)
|
|
摘要:
We previously reported the gene deletion encoding cytochrome P-450 cholesterol side-chain cleavage enzyme (P450SCC, resulting in complete elimination of the adrenal gene expression and causing congenital adrenal hyperplasia in the rabbit. Using the rabbit congenital adrenal hyperplasia model, we investigated the wild type (wt) P-450SCCgene dose effect on gene expression in three P-450SCCgenotype animals [wt/wt, wt/mutant (mt), mt/mt] identified by Southern blot analysis. Northern blots using a rabbit P-450SCCcDNA probe revealed no detectable P-450SCCmRNA in individual adrenals of animals with congenital adrenal hyperplasia (mt/mt) and approximately half or slightly less than half the levels of the mRNA in the pooled adrenals of five heterozygous (wt/mt) newborn animals compared with the mRNA levels in the pooled adrenals of five homozygous normal (wt/wt) newborn animals. Identical P-450SCCmRNA levels were found individual adrenals of adult animals with regard to the P-450SCCgenotype, although at a higher expression level than in the newborn animals of the same genotype. Control Northern blots using human CPY21-B cDNA and cytoplasmic actin cDNA probes confirmed the accuracy and integrity of RNA. Western immunoblotting using antiovine P-450SCCantibody revealed decreased P-450SCCprotein in the adrenals of wt/mt animals at approximately half the level of the P-450SCCprotein in the adrenals of the wt/wt animals. Baseline and ACTE-stimulated serum corticosterone (B) levelsin vivowere similar between the age-matched wt/mt and wt/wt animals, whereas ACTH-stimulated B levels in adult animals were higher than those in the newborn animals irrespective of P-450SCCgenotype. These data demonstrated for the first time the presence of a wt steroidogenic enzyme gene dose effect on gene expressionin vivoat the levels of the mRNA and enzyme protein. With age, the gene dose-related gene expression was maintained, although at higher expression levels. The normal adrenal B-producing capacity in heterozygous, wt/mt animals despite the markedly decreased P-450SCCgene expression suggests the presence of either a mechanism compensating the availability of mitochondrial cholesterol substrate to overcome the decreased P-450SCCor rate-limiting effect of P-450SCCin the conversion of excess cholesterol substrate available in the adrenal mitochondria. The greater B-producing capacity under ACTH stimulation in the adult animals compared with the newborn animal irrespective of P-450SCCgenotype therefore is likely from the greater adrenal receptor capacity for ACTH rather than from the greater P-450SCCgene expression level.
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
24. |
4 GONADOTROPIN SECRETION IN CONGENITAL ADRENAL HYPERPLASIA (CAH) |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 672-672
ME. Escobar,
H. Domené,
G. Ropelato,
L. Grufieiro,
C. Bergadá,
Preview
|
PDF (97KB)
|
|
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
25. |
10 GnRH AGONIST THERAPY IN TRUE PRECOCIUS PUBERTY SECONDARY TO HYPOTHALAMIC HAMARTOMA (IHH) |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 673-673
S. Domenice,
AC. Latronico,
BB. Mendonca,
IJP. Arnhold,
W. Bloise,
Preview
|
PDF (126KB)
|
|
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
26. |
16 JUVENILE AUTOIMMUNE THYROID DISEASE (ATD). FINE NEEDLE ASPIRATION BIOPSY (FNABT) AND TIMUNOAMARCATION (PART I) |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 674-674
J. Goldberg,
V. Herzovich,
J. Rossi,
S. Iorcansky,
Preview
|
PDF (123KB)
|
|
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
27. |
22 STEOID BIOSNTHESIS IN PATIENTS WITH MALE PSUDOHERMAFRODITISM. STUDIES PERFORMED IN LEYDIGG CELL MESENCHYMAL PRECURSORS IN CULTURE |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 675-675
E. Pellizzari,
S. Ayuso,
S. Campo,
H. Chemes,
E. Boulgourdjian,
c. Bergadá,
S. Cigorraga,
Preview
|
PDF (122KB)
|
|
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
28. |
28 USEFULNESS OF LH MEASUREMENTS BY A HIGHLY SENSITIVE INMUNORADIOMETRIC ASSAY IN RESPONSE TO GnRH IN THE DIFFERENTIATION OF DIVERSE GONADOTROPIC PATHOLOGIES |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 676-676
M. Stivel,
GG. Arias,
SB. Campeni,
C. y,
A. Oneto,
Preview
|
PDF (124KB)
|
|
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
29. |
34 DIFFERENTIALREGULATION OF GROWTH HORMONE RECEPTOR EXPRESSION BY ESTRADIOL AND TESTOSTERONE |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 677-677
HM. Domené,
YM Y,
G. Marin,
J. Sztein,
F. Cassorla,
Preview
|
PDF (122KB)
|
|
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
30. |
4 MUTATIONS OF THE ANDROGEN RECEPTOR GENE IN THE ANDROGEN INSENSITIVITY SYNDROME. (AIS) |
|
Pediatric Research,
Volume 36,
Issue 5,
1994,
Page 678-678
B Mendonca,
ACM. Rigon,
W. Bloise,
TM. Claude,
Preview
|
PDF (84KB)
|
|
ISSN:0031-3998
出版商:OVID
年代:1994
数据来源: OVID
|
|