ArticleHormones (Athens, Greece)2022
Differences in somatostatin receptor subtype expression in patients with acromegaly: new directions for targeted therapy?
Article in Hormones (Athens, Greece), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 15 citations in OpenAlex.
- Lanreotide in endothelial corneal inflammation.Hormones (Athens, Greece) · 2026Article
- Dopamine receptor expression predicts cabergoline response in persistent somatotroph adenoma.Pituitary · 2025Article
- SSTR2 expression in neoplastic and normal anterior pituitary is impacted by age, sex, and hormonal status.Journal of neuropathology and experimental neurology · 2025Article
- Somatostatin receptors in pituitary somatotroph adenomas as predictors of response to somatostatin receptor ligands: A pathologist's perspective.Brain pathology (Zurich, Switzerland) · 2025Review
- Predicting Response to Medical Treatment in Acromegaly via Granulation Pattern, Expression of Somatostatin Receptors Type 2 and 5 and E-Cadherin.International journal of molecular sciences · 2024Article
- Somatostatin receptor expression and clinical outcome of multilineage pituitary tumours expressing PIT1 and SF1.Endocrine connections · 2023Article
- Acromegaly among a Moroccan population.The Pan African medical journal · 2023Article
- Approach of Acromegaly during Pregnancy.Diagnostics (Basel, Switzerland) · 2022Review
- Immunohistochemical evaluation of biomarkers with predictive role in acromegaly: a literature review.Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologieReview
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Authors and funding
8 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
purposeTo analyze the expression of somatostatin receptor (SSTR)2a and 5 by immunohistochemistry (IHC) in surgically resected somatotrophic pituitary adenomas and to associate expression rates with tumor size and clinical, biochemical, and histological parameters and response to somatostatin analog (SA) therapy.
methodsForty-three microsurgically treated patients with histopathologically proven growth hormone (GH)-producing pituitary adenoma were included (WHO 2017). SSTR subtype expression was analyzed in adenoma tissues using monoclonal antibodies (Abcam, SSTR2a-UMB1, SSTR5-UMB4). Expression rates were classified as low (≤ 20% staining positivity), moderate (21-50%), and high (> 50%). Furthermore, biochemical parameters such as human growth hormone (hGH) and insulin-like growth factor-1 (IGF-1) levels were measured and clinical, biochemical, radiological, and histological data were evaluated.
resultsOf the 43 patients included in this study, 28 were female and 15 were male. The median age was 52 years (range 17-72 years). The median tumor size was 1.2 cm (range: 0.13-3.93 cm). All resected tumors showed positivity for somatotrophic hormone (STH). In all tissue samples, SSTR2a signal expression was detectable in immunohistochemistry, while only 39 samples were positive for SSTR5. Thirty-six samples had a high expression of SSTR2a, while three had a moderate and four a low SSTR2a signal. In comparison, SSTR5 signal was high in 26 out of 43 samples, while seven adenomas showed a moderate and six cases a low expression rate of SSTR5. The median IGF-1 was 714.2 µg/l and the median GH 19.6 mU/l (= 6.53 µg/l). The present study indicates that there is no significant relationship between the expression rates of receptor subtypes and the parameters we analyzed. However, our study revealed that smaller adenomas have a lower baseline GH level (p = 0.015),
conclusionIHC with monoclonal antibodies appears to be a suitable method to determine the expression rates of SSTR2a and 5 at protein levels, as it is not possible to draw conclusions regarding receptor subtypes solely on the basis of the parameters analyzed.
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