Abstract
As the incidence of neuroendocrine tumors has been rising, gender differences in epidemiology and clinical behavior have emerged, and interest into a gender-driven management of these tumors has grown with the aim to improve survival and quality of life of these patients. Somatostatin Analogues represent the first line of systemic treatment of both functional and non-functional neuroendocrine tumors, through the expression of somatostatin receptors (SSTRs) in the tumor cells, and proved effective in controlling hormonal hypersecretion and inhibiting tumor growth, improving progression-free survival and overall survival of these patients. Aim of the present review is to investigate any differences by gender in efficacy and safety of SSTS-targeted therapies, that represent the mainstay treatment of neuroendocrine tumors, as they emerge from studies of varying design and intent. Although preclinical studies have provided evidence in favor of differences by gender in tumor expression of SSTR, as well as of the role of sex hormones and related receptors in modulating SSTRs expression and function, the clinical studies conducted so far have not shown substantial differences between males and females in either efficacy or toxicity of SSTR-targeted therapies, even if with sometimes inconsistent results. Moreover, in most studies gender was not a predictor of response to treatment. Studies specifically designed to address this issue are needed to develop gender-specific therapeutic algorithms, improving patients' prognosis and quality of life.
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Abbreviations
- AR:
-
Androgen Receptor
- BMI:
-
Body mass index
- CaS:
-
Carcinoid Syndrome
- ERα:
-
Estrogen receptor alpha
- ERβ:
-
Estrogen receptor beta
- E2:
-
Estradiol
- GEP-NET:
-
Gastroenteropancreatic Neuroendocrine Tumors
- GH:
-
Growth hormone
- H3K4:
-
Histone H3 lysine K4
- MEN1:
-
Multiple endocrine neoplasia type 1
- MENX:
-
Multiple Endocrine Neoplasia X
- NEC:
-
Neuroendocrine Carcinomas
- NEN:
-
Neuroendocrine Neoplasms
- NET:
-
Neuroendocrine Tumors
- NF pit-NET:
-
Non-functioning pituitary tumors
- PET:
-
Positron emission tomography
- pitNET:
-
Pituitary tumors
- PR:
-
Progesteron receptor
- PRRT:
-
Peptide-receptor radionuclide therapy
- SI-NET:
-
Small-intestine Neuroendocrine Tumors
- SSA:
-
Somatostatin Analogues
- SST:
-
Somatostatin
- SSTR:
-
Somatostatin receptors
- SUV:
-
Standardized uptake value
- TFF1:
-
Trefoil factor 1
- VDR:
-
Vitamin D receptor
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Acknowledgements
This study is part of the ‘Neuroendocrine Tumors Innovation Knowledge and Education’ project led by Prof. Antongiulio Faggiano, Prof. Andrea M. Isidori, and Prof. Annamaria Colao, which aims at increasing the knowledge on neuroendocrine tumors. We would like to acknowledge all the Collaborators of the “NIKE” project: M. Albertelli, I. Alessi, B. Altieri, S. Antonini, L. Barrea, E. Benevento F. Birtolo, F. Campolo, G. Cannavale, C. Cantone, S. Carra, R. Centello, A. Cozzolino, F. De Cicco, S. Di Molfetta, V. Di Vito, G. Fanciulli, T. Feola, F. Ferraù, E. Giannetta, F. Grillo, E. Guadagno, V. Guarnotta, I. Hasballa A. La Salvia, A. Laffi, A. Lania, A. Liccardi, P. Malandrino, R. Mazzilli, E. Messina, N. Mikovic, R. Minotta, R. Modica, C. Pandozzi, G. Pugliese, G. Puliani, A. Ragni, M. Rubino, F. Russo, F. Sesti, L. Verde, A. Veresani, C. Vetrani, G. Vitale, I. Zanata.
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Each Author gave a substantial contribute to the paper and approved the final version to be published. R.M.R., I.A., S.G., E.G., C.M., M.G.T., and V.Z. made substantial contributions to the conception of the article, literature search and wrote the manuscript. A.I., A.F., and A.C. critically revised the work for important intellectual content. All authors read and approved the final manuscript.
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Ruggeri, R.M., Aini, I., Gay, S. et al. Efficacy and tolerability of somatostatin analogues according to gender in patients with neuroendocrine tumors. Rev Endocr Metab Disord 25, 383–398 (2024). https://doi.org/10.1007/s11154-023-09858-6
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DOI: https://doi.org/10.1007/s11154-023-09858-6