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Mendonça FF, Sobral DV, Durante ACR, Miranda ACC, Mejia J, de Paula Faria D, Marques FLN, de Barboza MF, Fuscaldi LL, Malavolta L. Assessment of bioactive peptides derived from laminin-111 as prospective breast cancer-targeting agents. Amino Acids 2024; 56:1. [PMID: 38285098 PMCID: PMC10824877 DOI: 10.1007/s00726-023-03379-x] [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: 10/20/2023] [Accepted: 12/24/2023] [Indexed: 01/30/2024]
Abstract
Breast cancer remains a pressing public health issue primarily affecting women. Recent research has spotlighted bioactive peptides derived from laminin-111, implicated in breast tumor development. Remarkably, the sequences IKVAV, YIGSR, and KAFDITYVRLKF from the α1, β1, and γ1 chains, respectively, have garnered significant attention. This study aims to assess the potential of these radiolabeled peptides as targeting agents for breast cancer. The three peptides were synthesized using the Fmoc strategy, purified via reversed-phase high-performance liquid chromatography (RP-HPLC), and characterized through mass spectrometry. Iodine-131 (131I) radiolabeling was performed using the chloramine T method, exhibiting high radiochemical yield and stability for [131I]I-YIKVAV and [131I]I-YIGSR. Conversely, [131I]I-KAFDITYVRLKF demonstrated low radiochemical yield and stability and was excluded from the biological studies. The lipophilicity of the compounds ranged from - 2.12 to - 1.10. Serum protein binding assay for [131I]I-YIKVAV and [131I]I-YIGSR reached ≅ 48% and ≅ 25%, respectively. Affinity for breast cancer cells was evaluated using MDA-MB-231 and MCF-7 tumor cell lines, indicating the affinity of the radiopeptides with these tumor cells. Ex vivo biodistribution profiles of the radiopeptides were assessed in the MDA-MB-231 breast tumor animal model, revealing tumor tissue accumulation, supported by a high tumor-to-contralateral muscle ratio and autoradiography. These results signify the effective penetration of YIKVAV and YIGSR into tumor tissue. Therefore, the synthesized α1 and β1 peptide fragments exhibit favorable characteristics as potential breast cancer-targeting agents, promising future exploration as radiopharmaceuticals for breast cancer.
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Affiliation(s)
- Fernanda Ferreira Mendonça
- Department of Physiological Sciences, Santa Casa de Sao Paulo School of Medical Sciences, Rua Dr. Cesareo Motta Jr. 61, Sao Paulo, CEP 01221-020, Brazil
| | - Danielle Vieira Sobral
- Department of Physiological Sciences, Santa Casa de Sao Paulo School of Medical Sciences, Rua Dr. Cesareo Motta Jr. 61, Sao Paulo, CEP 01221-020, Brazil
| | - Ana Claudia Ranucci Durante
- Department of Physiological Sciences, Santa Casa de Sao Paulo School of Medical Sciences, Rua Dr. Cesareo Motta Jr. 61, Sao Paulo, CEP 01221-020, Brazil
| | | | - Jorge Mejia
- Hospital Israelita Albert Einstein, Sao Paulo, 05521-200, Brazil
| | - Daniele de Paula Faria
- Laboratory of Nuclear Medicine (LIM-43), Department of Radiology and Oncology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, 01246-903, Brazil
| | - Fabio Luiz Navarro Marques
- Laboratory of Nuclear Medicine (LIM-43), Department of Radiology and Oncology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, 01246-903, Brazil
| | | | - Leonardo Lima Fuscaldi
- Department of Physiological Sciences, Santa Casa de Sao Paulo School of Medical Sciences, Rua Dr. Cesareo Motta Jr. 61, Sao Paulo, CEP 01221-020, Brazil
| | - Luciana Malavolta
- Department of Physiological Sciences, Santa Casa de Sao Paulo School of Medical Sciences, Rua Dr. Cesareo Motta Jr. 61, Sao Paulo, CEP 01221-020, Brazil.
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