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Pituitary

, Volume 22, Issue 4, pp 344–352 | Cite as

Antibody array strategy for human growth factor secretome profiling of GH-secreting adenomas

  • Orly Ozeri
  • Zvi R. Cohen
  • Moshe Hadani
  • Dvora Nass
  • Ilan Shimon
  • Hadara RubinfeldEmail author
Article
  • 48 Downloads

Abstract

Purposes

To test if the antibody array strategy could be utilized to simultaneously detect the secretion of multiple growth factors by human pituitary GH-adenomas and to measure octreotide-induced alterations.

Methods

Specimens of human pituitary adenomas were cultured and incubated with or without octreotide for 24 h. Conditional media were analyzed by human growth factor antibody array and VEGF concentrations were measured by ELISA. Media were also analyzed for GH concentrations. p21 expression levels were examined by Western blot of the specimens lysates.

Results

The antibody arrays successfully identified growth factors secreted by GH-adenomas in vitro. Octreotide treatment induced both elevations and reductions in growth factors secretion. GH response to octreotide was measured, and in this small-sized study resistant and sensitive GH-adenomas presented with no unique secretome pattern of each of the groups. Octreotide-induced VEGF alterations analyzed by the antibody array and by ELISA were not fully matched.

Conclusions

This study suggests that the broad proteomic strategy of antibody arrays may be utilized to study the growth factors secretion pattern of GH-adenomas and its regulation by somatostatin analogs or other compounds.

Keywords

GH-adenomas Growth factors Secretome VEGF 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute of Endocrinology and Felsenstein Medical Research CenterPetach TikvaIsrael
  2. 2.Rabin Medical CenterPetach TikvaIsrael
  3. 3.Sackler School of MedicineTel AvivIsrael
  4. 4.Tel-Aviv UniversityTel AvivIsrael
  5. 5.Department of PathologySheba Medical CenterTel-HashomerIsrael
  6. 6.Department of NeurosurgerySheba Medical CenterTel-HashomerIsrael

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