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Kumar U. Somatostatin and Somatostatin Receptors in Tumour Biology. Int J Mol Sci 2023; 25:436. [PMID: 38203605 PMCID: PMC10779198 DOI: 10.3390/ijms25010436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/24/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024] Open
Abstract
Somatostatin (SST), a growth hormone inhibitory peptide, is expressed in endocrine and non-endocrine tissues, immune cells and the central nervous system (CNS). Post-release from secretory or immune cells, the first most appreciated role that SST exhibits is the antiproliferative effect in target tissue that served as a potential therapeutic intervention in various tumours of different origins. The SST-mediated in vivo and/or in vitro antiproliferative effect in the tumour is considered direct via activation of five different somatostatin receptor subtypes (SSTR1-5), which are well expressed in most tumours and often more than one receptor in a single cell. Second, the indirect effect is associated with the regulation of growth factors. SSTR subtypes are crucial in tumour diagnosis and prognosis. In this review, with the recent development of new SST analogues and receptor-specific agonists with emerging functional consequences of signaling pathways are promising therapeutic avenues in tumours of different origins that are discussed.
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Affiliation(s)
- Ujendra Kumar
- Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada
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Qi M, Liu Y, Su M, Huang R. Primary Hepatocellular Carcinoma Revealed on 68Ga-DOTATATE in a Patient With Nasopharyngeal Carcinoma. Clin Nucl Med 2023:00003072-990000000-00642. [PMID: 37486702 DOI: 10.1097/rlu.0000000000004774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
ABSTRACT A 56-year-old man underwent a prospective study (ChiCTR2300070081), which is a head-to-head comparison of 18F-FDG and 68Ga-DOTATATE PET/MR in EB-positive nonkeratinizing nasopharyngeal carcinoma after chemotherapy. Bilateral cervical abnormal lymph nodes were both detected by 18F-FDG and 68Ga-DOTATATE PET/MRI, whereas 2 hepatic lesions only were shown on 68Ga-DOTATATE, which subsequent pathologically proved to be primary hepatocellular carcinoma.
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Affiliation(s)
- Mengfang Qi
- From the Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, China
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Antitumoral and Anti-inflammatory Roles of Somatostatin and Its Analogs in Hepatocellular Carcinoma. Anal Cell Pathol (Amst) 2021; 2021:1840069. [PMID: 34873567 PMCID: PMC8643256 DOI: 10.1155/2021/1840069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/12/2021] [Indexed: 11/22/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the most common primary liver cancer and affects about 8% of cirrhotic patients, with a recurrence rate of over 50%. There are numerous therapies available for the treatment of HCC, depending on cancer staging and condition of the patient. The complexity of the treatment is also justified by the unique pathogenesis of HCC that involves intricate processes such as chronic inflammation, fibrosis, and multiple molecular carcinogenesis events. During the last three decades, multiple in vivo and in vitro experiments have used somatostatin and its analogs (SSAs) to reduce the proliferative and metastatic potential of hepatoma cells by inducing their apoptosis and reducing angiogenesis and the inflammatory component of HCC. Most experiments have proven successful, revealing several different pathways and mechanisms corresponding to the aforementioned functions. Moreover, a correlation between specific effects and expression of somatostatin receptors (SSTRs) was observed in the studied cells. Clinical trials have tested either somatostatin or an analog, alone or in combination with other drugs, to explore the potential effects on HCC patients, in various stages of the disease. While the majority of these clinical trials exhibited minor to moderate success, some other studies were inconclusive or even reported negative outcomes. A complete evaluation of the efficacy of somatostatin and SSAs is still the matter of intense debate, and, if deemed useful, these substances may play a beneficial role in the management of HCC patients.
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Murakami K, Kumata H, Miyagi S, Kamei T, Sasano H. The prognostic significance of neuroendocrine markers and somatostatin receptor 2 in hepatocellular carcinoma. Pathol Int 2021; 71:682-691. [PMID: 34320691 DOI: 10.1111/pin.13149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 07/15/2021] [Indexed: 12/17/2022]
Abstract
Prostatic and colon carcinomas with neuroendocrine differentiation are reported to behave more aggressively than those without such differentiation. In hepatocellular carcinomas (HCCs), however, only a few studies have reported the expression status of neuroendocrine markers and somatostatin receptor 2, the main target of a somatostatin analog. Furthermore, the prognostic significance of the markers in HCCs has not been fully explored. We evaluated the expression of the neuroendocrine makers (chromogranin A, synaptophysin, and CD56) and somatostatin receptor 2 (SSTR2) in 95 HCCs, and investigated the correlation between the expression of these markers and clinicopathological findings. Chromogranin A was immunolocalized in 2 cases, synaptophysin in 15 cases, CD56 in 11 cases, and SSTR2 in 19 cases. Immunoreactivity of synaptophysin and CD56 were the significant unfavorable prognostic factors in terms of 2-year disease-free survival (DFS) and the overall survival (OS) along with a high nuclear mitosis level (>10/10 high-power field), a larger tumor size (>5 cm), the presence of vascular and/or biliary invasion, and high TNM stage (III/IV). Multivariate Cox proportional hazards analysis identified synaptophysin as an independent prognostic factor for 2-year DFS and OS. Synaptophysin expression can be used to predict an unfavorable prognosis in patients with HCC.
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Affiliation(s)
- Keigo Murakami
- Division of Pathology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi, Japan.,Department of Pathology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Hiroyuki Kumata
- Division of Advanced Surgical Science and Technology, Graduate School of Medicine, Tohoku University School of Medicine, Sendai, Miyagi, Japan
| | - Shigehito Miyagi
- Division of Advanced Surgical Science and Technology, Graduate School of Medicine, Tohoku University School of Medicine, Sendai, Miyagi, Japan
| | - Takashi Kamei
- Division of Advanced Surgical Science and Technology, Graduate School of Medicine, Tohoku University School of Medicine, Sendai, Miyagi, Japan
| | - Hironobu Sasano
- Department of Pathology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
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Tao L, Chen Y, Huang Y, Yin W, Yu G. SSTR2a is constantly expressed in lymphoepithelioma-like carcinoma with squamous differentiation other than that with glandular differentiation. J Clin Pathol 2020; 74:704-708. [PMID: 33132215 DOI: 10.1136/jclinpath-2020-206903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/04/2020] [Accepted: 08/10/2020] [Indexed: 11/04/2022]
Abstract
AIMS Somatostatin receptor 2a (SSTR2a) is an important diagnostic marker of meningioma and neuroendocrine tumours and is frequently expressed in primary and metastatic non-keratinising nasopharyngeal carcinoma (NK-NPC). Since NK-NPC cases are considered a kind of lymphoepithelioma-like carcinoma (LELCs) which originate from the nasopharynx, information on the expression profile of SSTR2a in LELC in other sites with squamous and glandular differentiations is still lacking. This study aimed to assess the expression of SSTR2a in LELC of various organs and clarify its expression profile. METHODS Expression of SSTR2a in 164 cases of LELC was retrospectively analysed by immunohistochemistry in paraffin-embedded tissues, including 146 cases of LELC with squamous differentiation (120 cases of the nasopharynx, 21 cases of the lung and 5 cases of the parotid gland) and 18 cases of LELC with glandular differentiation (15 cases of the stomach and 3 cases of the liver). RESULTS We found that all (100%) cases of LELC of the lung (21/21) and parotid gland (5/5), and 93.3% (112/120) cases of LELC of the nasopharynx showed a diffused and strong expression of SSTR2a, while cases of gastric (0/15) and biliary (0/3) showed no SSTR2a expression. CONCLUSION SSTR2a is constantly expressed in LELC with squamous differentiation, but not expressed in LELC with glandular differentiation. However, the selective expression mechanism of SSTR2a remains unknown, which needs further investigation. Our novel findings might provide potential therapeutic approaches for the treatment of LELC with squamous cell differentiation.
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Affiliation(s)
- LiLi Tao
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong, China
| | - Yaoli Chen
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong, China
| | - Yuhua Huang
- Department of pathology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China .,Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
| | - Weihua Yin
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong, China
| | - Guangyin Yu
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong, China
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Polowczyk B, Kałużny M, Bolanowski M. Somatostatin analogues in the therapy of neuroendocrine tumors: Indications, contraindications, side-effects. POSTEP HIG MED DOSW 2020. [DOI: 10.5604/01.3001.0014.3056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The presence of somatostatin receptors (SSTRs) is crucial in planning the therapy of patients with neuroendocrine tumors. This applies especially to patients in whom surgery has proven unsuccessful or there are contraindications for it. Increased SSTR expression has been observed in many cancers originating in the neuroendocrine system. Among them we distinguish anterior pituitary adenomas producing GH in excess and leading to the development of acromegaly, adenocorticotropic adenomas that autonomously synthesize ACTH, which leads to the development of ACTH-dependent Cushing’s syndrome (Cushing’s disease), as well as
adenomas of the anterior pituitary from thyrotropic cells. Rich expression of these receptors
has been confirmed in epithelial tumors of neuroendocrine origin in the gastrointestinal
tract, pancreas and lungs. Somatostatin analogues, also called somatostatin receptor ligands,
are effective in symptomatic therapy; they enable disease control, exhibit anti-proliferative
effects and allow hormonal balance, which reduces mortality among patients and improves
their quality of life. The antitumor effect of somatostatin analogues has been proven in in
vitro and in vivo studies. In therapy they are usually well tolerated and safe. For many years,
somatostatin analogues have maintained an important place in the treatment of neuroendocrine
tumors and are still the subject of many studies. The aim of the study is to analyze,
based on available literature, therapeutic indications for the use of somatostatin analogues,
taking into account contraindications for therapy and its possible side effects.
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Affiliation(s)
- Beata Polowczyk
- Katedra i Klinika Endokrynologii, Diabetologii i Leczenia Izotopami, Uniwersytet Medyczny im. Piastów Śląskich we Wrocławiu
| | - Marcin Kałużny
- Katedra i Klinika Endokrynologii, Diabetologii i Leczenia Izotopami, Uniwersytet Medyczny im. Piastów Śląskich we Wrocławiu
| | - Marek Bolanowski
- Katedra i Klinika Endokrynologii, Diabetologii i Leczenia Izotopami, Uniwersytet Medyczny im. Piastów Śląskich we Wrocławiu
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Tao L, Chen Y, Shi X, Yu G, Yin W, Huang Y. Expression of potential therapeutic target SSTR2a in primary and metastatic non-keratinizing nasopharyngeal carcinoma. Virchows Arch 2020; 477:573-579. [PMID: 32328798 DOI: 10.1007/s00428-020-02815-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 03/14/2020] [Accepted: 04/12/2020] [Indexed: 12/15/2022]
Abstract
Somatostatin receptor 2a (SSTR2a) is an important diagnostic and scintigraphic marker in several tumors, as well as a potential therapeutic target. However, the expression and clinicopathologic significance of SSTR2a in nasopharyngeal carcinoma (NPC) remain unknown. The expression of SSTR2a was retrospectively analyzed in a large series of NPC tissue samples (106 primary NPC samples, comprising 99 primary non-keratinizing NPC (NK-NPC) and 7 keratinizing NPC (K-NPC) samples, and 41 metastatic NPC samples) by immunohistochemistry, with 24 cases of normal nasopharyngeal mucosa tissues used as a control group. Normal epithelia in nasopharyngeal mucosa were negative for SSTR2a in all 24 cases. The expression of SSTR2a in primary NPC was correlated to the histological subtype. Most cases of primary NK-NPC showed expression of SSTR2a (93.9%, 93/99 cases). The percentage of SSTR2a-positive tumor cells ranged from 10 to 100%, while the intensity ranged from 2+ to 4+. None of the primary K-NPC samples showed SSTR2a expression (0/7, 100%). All cases of NPC showed negative expression of other neuroendocrine markers, including synaptophysin, chromogranin A, and CD56. Of all 41 cases of metastatic NK-NPC lesions, SSTR2a expression is concordant with that of the primary lesions, which shows statistical significance (p < 0.001). Our observations expand the spectrum of recognized SSTR2a-positive tumors and demonstrate for the first time that SSTR2a is frequently expressed in primary and metastatic NK-NPC, highlighting its potential as a scintigraphic and therapeutic target in this disease.
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Affiliation(s)
- Lili Tao
- Department of Pathology, Peking University Shenzhen Hospital, 1116 Lianhua Road, Futian District, Shenzhen, 518000, Guangdong, People's Republic of China
| | - Yaoli Chen
- Department of Pathology, Peking University Shenzhen Hospital, 1116 Lianhua Road, Futian District, Shenzhen, 518000, Guangdong, People's Republic of China
| | - Xiaoxin Shi
- Department of Pathology, Peking University Shenzhen Hospital, 1116 Lianhua Road, Futian District, Shenzhen, 518000, Guangdong, People's Republic of China
| | - Guangyin Yu
- Department of Pathology, Peking University Shenzhen Hospital, 1116 Lianhua Road, Futian District, Shenzhen, 518000, Guangdong, People's Republic of China
| | - Weihua Yin
- Department of Pathology, Peking University Shenzhen Hospital, 1116 Lianhua Road, Futian District, Shenzhen, 518000, Guangdong, People's Republic of China
| | - Yuhua Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, Guangdong, People's Republic of China. .,Department of Pathology, Sun Yat-sen University Cancer Center, 651 Dong Feng East Road, Guangzhou, 510060, Guangdong, People's Republic of China.
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Re: Hepatocellular Carcinoma Mimicking Neuroendocrine Tumor Metastasis on 68Ga-DOTATATE PET/CT. Clin Nucl Med 2020; 45:258-259. [DOI: 10.1097/rlu.0000000000002634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Reynaert H, Colle I. Treatment of Advanced Hepatocellular Carcinoma with Somatostatin Analogues: A Review of the Literature. Int J Mol Sci 2019; 20:ijms20194811. [PMID: 31569719 PMCID: PMC6801667 DOI: 10.3390/ijms20194811] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 09/20/2019] [Accepted: 09/25/2019] [Indexed: 12/11/2022] Open
Abstract
Hepatocellular carcinoma, one of the most dreaded complications of cirrhosis, is a frequent cancer with high mortality. Early primary liver cancer can be treated by surgery or ablation techniques, but advanced hepatocellular carcinoma remains a challenge for clinicians. Most of these patients have underlying cirrhosis, which complicates or even precludes treatment. Therefore, efficacious treatments without major side effects are welcomed. Initial results of treatment of advanced hepatocellular carcinoma with somatostatin analogues were promising, but subsequent trials have resulted in conflicting outcomes. This might be explained by different patient populations, differences in dosage and type of treatment and differences in somatostatin receptor expression in the tumor or surrounding tissue. It has been shown that the expression of somatostatin receptors in the tumor might be of importance to select patients who could benefit from treatment with somatostatin analogues. Moreover, somatostatin receptor expression in hepatocellular carcinoma has been shown to correlate with recurrence, prognosis, and survival. In this review, we will summarize the available data on treatment of primary liver cancer with somatostatin analogues and analyze the current knowledge of somatostatin receptor expression in hepatocellular carcinoma and its possible clinical impact.
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Affiliation(s)
- Hendrik Reynaert
- Department of Gastroenterology-hepatology UZBrussel, Laarbeeklaan 101, 1090 Brussels, Belgium.
- Liver Cell Biology Lab, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium.
| | - Isabelle Colle
- Department of Gastroenterology-hepatology, ASZ Aalst, Merestraat 80, 9300 Aalst, Belgium.
- Department of Gastroenterology-hepatology, Ghent University, De Pintelaan, 9000 Ghent, Belgium.
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Hepatocellular Carcinoma Mimicking Neuroendocrine Tumor Metastasis on 68Ga-DOTATATE PET/CT. Clin Nucl Med 2019; 44:330-331. [PMID: 30688738 DOI: 10.1097/rlu.0000000000002467] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Ga-DOTATATE is a radiolabeled somatostatin analog used for the detection and characterization of somatostatin receptor (SSR)-overexpressing tumors, particularly well-differentiated neuroendocrine tumors. We present a case of a 65-year-old man with well-differentiated pancreatic neuroendocrine tumor post-Whipple surgery and a new liver lesion on CT. Ga-DOTATATE PET/CT was performed for SSR characterization and restaging, which demonstrated the lesion to be intensely SSR positive and interpreted as a neuroendocrine metastasis. However, subsequent pathology proved the lesion to be a hepatocellular carcinoma. This case adds hepatocellular carcinoma as a potentially DOTATATE-avid malignancy to be considered in the differential diagnoses of SSR-positive liver lesions.
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