Expression of the insulin-like growth factors and their receptors in term placentas: A comparison between normal and IUGR births
| Autor: | Sayeda Abu-Amero, Janet I. Vaughan, Philip Bennett, Zehra Ali, Gudrun E. Moore |
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| Rok vydání: | 1998 |
| Předmět: |
medicine.medical_specialty
Insulin medicine.medical_treatment Growth factor Insulin-like growth factor 2 receptor Cell Biology Biology female genital diseases and pregnancy complications Insulin-like growth factor-binding protein Insulin-like growth factor Insulin receptor Endocrinology medicine.anatomical_structure Internal medicine Placenta embryonic structures Genetics medicine biology.protein reproductive and urinary physiology Developmental Biology Insulin-like growth factor 1 receptor |
| Zdroj: | Molecular Reproduction and Development. 49:229-235 |
| ISSN: | 1098-2795 1040-452X |
| DOI: | 10.1002/(sici)1098-2795(199803)49:3<229::aid-mrd2>3.0.co;2-q |
| Popis: | Intrauterine growth retardation (IUGR) is defined as growth retarded to be below the tenth centile. The insulin-like growth factors and their receptors are implicated in pre- and postnatal growth and development, and it is believed that alteration in their activity may contribute to IUGR. In this study nine normal and nine intrauterine growth retarded births were followed and term placentas examined for expression of the insulin-like growth factors and their receptors. It was found that the expression of insulin-like growth factor 1 (IGF1), insulin-like growth factor 2 (IGF2), and the insulin, IGF1 and IGF2 receptor transcripts (IGF1R and IGF2R, respectively) was present in all term placentas examined. Expression of insulin was not detected. Quantitative polymerase chain reaction (PCR) was used to compare transcription levels in term placentas from normal with IUGR births. There was no significant difference in the levels of transcripts for IGF1, insulin receptor, or IGF2R between normal and IUGR term placentas. However, the IUGR term placentas had significantly higher levels of IGF2 and IGF1R expression compared with the normal term placentas. The increase in the transcription of IGF2 and IGF1R in IUGR term placentas may represent a counter regulatory mechanism in response to the growth retardation. |
| Databáze: | OpenAIRE |
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