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Immunolocalization of transforming growth factor beta 1, beta 2, and beta 3 and insulin-like growth factor I in premature cranial suture fusion. 1997

D A Roth, and L I Gold, and V K Han, and J G McCarthy, and J J Sung, and J H Wisoff, and M T Longaker
Institute of Reconstructive Plastic Surgery, New York, N.Y., USA.

The etiology of craniosynostosis remains unknown. The beta group of transforming growth factors (TGF-beta) and insulin-like growth factors (IGF-I and IGF-II) are known to induce new bone formation and, when added exogenously, cause accelerated closure of calvarial defects. The possible roles of these bone growth factors in premature cranial suture fusion in humans have not been explored. We analyzed a total of 20 cranial suture biopsy samples (10 synostotic and 10 normal) from 10 infants with single-suture craniosynostosis undergoing cranial vault remodeling. Using isoform-specific antibodies for TGF-beta 1, -beta 2, and -beta 3 and IGF-I, we demonstrated immunoreactivity of these growth factors were present in human cranial sutures; the TGF-beta 2 isoform was the most intensely immunoreactive. Most importantly, the TGF-beta isoforms and IGF-I showed more intense immunoreactivity in the actively fusing craniosynostotic sutures compared with the control patent sutures. Specifically, the TGF-beta isoforms and IGF-I were intensely localized in the osteoblasts synthesizing new bone at the suture margin. It is noteworthy that although the patent sutures were less immunoreactive for TGF-beta isoforms than fused sutures, there was a distinct pattern of the TGF-beta 3 isoform that was immunolocalized to the margin of the normal patent sutures. This suggests a possible role for TGF-beta 3 in maintaining cranial suture patency. The increased immunoreactivity of both TGF-beta 2 and IGF-I in the actively fusing sutures compared with the patent control sutures indicates that these growth factors may play a role in the biology underlying premature suture closure. To our knowledge, this is the first study showing the presence of TGF-beta 1, -beta 2, and -beta 3 and IGF-I in prematurely fusing human cranial sutures. In the future, manipulating the local expression of these growth factors at the suture site may enable plastic surgeons to modulate premature suture fusion.

UI MeSH Term Description Entries
D007150 Immunohistochemistry Histochemical localization of immunoreactive substances using labeled antibodies as reagents. Immunocytochemistry,Immunogold Techniques,Immunogold-Silver Techniques,Immunohistocytochemistry,Immunolabeling Techniques,Immunogold Technics,Immunogold-Silver Technics,Immunolabeling Technics,Immunogold Silver Technics,Immunogold Silver Techniques,Immunogold Technic,Immunogold Technique,Immunogold-Silver Technic,Immunogold-Silver Technique,Immunolabeling Technic,Immunolabeling Technique,Technic, Immunogold,Technic, Immunogold-Silver,Technic, Immunolabeling,Technics, Immunogold,Technics, Immunogold-Silver,Technics, Immunolabeling,Technique, Immunogold,Technique, Immunogold-Silver,Technique, Immunolabeling,Techniques, Immunogold,Techniques, Immunogold-Silver,Techniques, Immunolabeling
D007223 Infant A child between 1 and 23 months of age. Infants
D007334 Insulin-Like Growth Factor I A well-characterized basic peptide believed to be secreted by the liver and to circulate in the blood. It has growth-regulating, insulin-like, and mitogenic activities. This growth factor has a major, but not absolute, dependence on GROWTH HORMONE. It is believed to be mainly active in adults in contrast to INSULIN-LIKE GROWTH FACTOR II, which is a major fetal growth factor. IGF-I,Somatomedin C,IGF-1,IGF-I-SmC,Insulin Like Growth Factor I,Insulin-Like Somatomedin Peptide I,Insulin Like Somatomedin Peptide I
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D003393 Cranial Sutures A type of fibrous joint between bones of the head. Cranial Suture,Suture, Cranial,Sutures, Cranial
D003398 Craniosynostoses Premature closure of one or more CRANIAL SUTURES. It often results in plagiocephaly. Craniosynostoses that involve multiple sutures are sometimes associated with congenital syndromes such as ACROCEPHALOSYNDACTYLIA; and CRANIOFACIAL DYSOSTOSIS. Acrocephaly,Oxycephaly,Brachycephaly,Craniostenosis,Craniosynostosis,Craniosynostosis, Lambdoidal,Craniosynostosis, Type 1,Lambdoid Synostosis,Metopic Synostosis,Plagiocephaly, Craniosynostosis,Plagiocephaly, Synostotic,Sagittal Synostosis,Scaphocephaly,Synostotic Anterior Plagiocephaly,Synostotic Posterior Plagiocephaly,Trigonocephaly,Unilateral Coronal Synostosis,1 Craniosynostoses, Type,1 Craniosynostosis, Type,Anterior Plagiocephaly, Synostotic,Coronal Synostoses, Unilateral,Coronal Synostosis, Unilateral,Craniostenoses,Craniosynostose,Craniosynostoses, Lambdoidal,Craniosynostoses, Type 1,Craniosynostosis Plagiocephaly,Lambdoid Synostoses,Lambdoidal Craniosynostoses,Lambdoidal Craniosynostosis,Metopic Synostoses,Plagiocephaly, Synostotic Anterior,Plagiocephaly, Synostotic Posterior,Posterior Plagiocephaly, Synostotic,Sagittal Synostoses,Synostoses, Lambdoid,Synostoses, Metopic,Synostoses, Sagittal,Synostoses, Unilateral Coronal,Synostosis, Lambdoid,Synostosis, Metopic,Synostosis, Sagittal,Synostosis, Unilateral Coronal,Synostotic Plagiocephaly,Type 1 Craniosynostoses,Type 1 Craniosynostosis,Unilateral Coronal Synostoses
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D016212 Transforming Growth Factor beta A factor synthesized in a wide variety of tissues. It acts synergistically with TGF-alpha in inducing phenotypic transformation and can also act as a negative autocrine growth factor. TGF-beta has a potential role in embryonal development, cellular differentiation, hormone secretion, and immune function. TGF-beta is found mostly as homodimer forms of separate gene products TGF-beta1, TGF-beta2 or TGF-beta3. Heterodimers composed of TGF-beta1 and 2 (TGF-beta1.2) or of TGF-beta2 and 3 (TGF-beta2.3) have been isolated. The TGF-beta proteins are synthesized as precursor proteins. Bone-Derived Transforming Growth Factor,Platelet Transforming Growth Factor,TGF-beta,Milk Growth Factor,TGFbeta,Bone Derived Transforming Growth Factor,Factor, Milk Growth,Growth Factor, Milk

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