1
|
Petrova ON, Lamarre I, Fasani F, Grillon C, Negrerie M. Soluble Guanylate Cyclase Inhibitors Discovered among Natural Compounds. JOURNAL OF NATURAL PRODUCTS 2020; 83:3642-3651. [PMID: 33290062 DOI: 10.1021/acs.jnatprod.0c00854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Soluble guanylate cyclase (sGC) is the human receptor of nitric oxide (NO) in numerous kinds of cells and produces the second messenger 3',5'-cyclic guanosine monophosphate (cGMP) upon NO binding to its heme. sGC is involved in many cell signaling pathways both under healthy conditions and under pathological conditions, such as angiogenesis associated with tumor growth. Addressing the selective inhibition of the NO/cGMP pathway is a strategy worthwhile to be investigated for slowing down tumoral angiogenesis or for curing vasoplegia. However, sGC inhibitors are lacking investigation. We have explored a chemical library of various natural compounds and have discovered inhibitors of sGC. The selected compounds were evaluated for their inhibition of purified sGC in vitro and sGC in endothelial cells. Six natural compounds, from various organisms, have IC50 in the range 0.2-1.5 μM for inhibiting the NO-activated synthesis of cGMP by sGC, and selected compounds exhibit a quantified antiangiogenic activity using an endothelial cell line. These sGC inhibitors can be used directly as tools to investigate angiogenesis and cell signaling or as templates for drug design.
Collapse
Affiliation(s)
- Olga N Petrova
- Laboratoire d'Optique et Biosciences, INSERM U1182, Ecole Polytechnique, Palaiseau, France
| | - Isabelle Lamarre
- Laboratoire d'Optique et Biosciences, INSERM U1182, Ecole Polytechnique, Palaiseau, France
| | - Fabienne Fasani
- Centre de Biophysique Moléculaire, UPR4301 CNRS, Orléans, France
| | | | - Michel Negrerie
- Laboratoire d'Optique et Biosciences, INSERM U1182, Ecole Polytechnique, Palaiseau, France
| |
Collapse
|
2
|
Antibody-Based Immunotherapy: Alternative Approaches for the Treatment of Metastatic Melanoma. Biomedicines 2020; 8:biomedicines8090327. [PMID: 32899183 PMCID: PMC7555584 DOI: 10.3390/biomedicines8090327] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/28/2020] [Accepted: 09/01/2020] [Indexed: 12/13/2022] Open
Abstract
Melanoma is the least common form of skin cancer and is associated with the highest mortality. Where melanoma is mostly unresponsive to conventional therapies (e.g., chemotherapy), BRAF inhibitor treatment has shown improved therapeutic outcomes. Photodynamic therapy (PDT) relies on a light-activated compound to produce death-inducing amounts of reactive oxygen species (ROS). Their capacity to selectively accumulate in tumor cells has been confirmed in melanoma treatment with some encouraging results. However, this treatment approach has not reached clinical fruition for melanoma due to major limitations associated with the development of resistance and subsequent side effects. These adverse effects might be bypassed by immunotherapy in the form of antibody–drug conjugates (ADCs) relying on the ability of monoclonal antibodies (mAbs) to target specific tumor-associated antigens (TAAs) and to be used as carriers to specifically deliver cytotoxic warheads into corresponding tumor cells. Of late, the continued refinement of ADC therapeutic efficacy has given rise to photoimmunotherapy (PIT) (a light-sensitive compound conjugated to mAbs), which by virtue of requiring light activation only exerts its toxic effect on light-irradiated cells. As such, this review aims to highlight the potential clinical benefits of various armed antibody-based immunotherapies, including PDT, as alternative approaches for the treatment of metastatic melanoma.
Collapse
|
3
|
Cavaleiro J, Oliveira NB, Ribeiro TA, Guimarães LF, Fernandes NM, da Silva-Neto ID, Marszaukowski F, Wohnrath K, Barreto CB, Schweikert M, Petroni G, Ortenzi C, Buonanno F, Picciani PHS, Oliveira ON, Soares CAG. Distinguishing Activities in the Photodynamic Arsenals of the Pigmented Ciliates Blepharisma sinuosum Sawaya, 1940 and Blepharisma japonicum Suzuki, 1954 (Ciliophora: Heterotrichea). Photochem Photobiol 2020; 96:1251-1266. [PMID: 32472704 DOI: 10.1111/php.13288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 05/13/2020] [Indexed: 11/29/2022]
Abstract
Blepharismins are photodynamic hypericin-like dianthrones produced as a variable pigment blend in Blepharisma ciliates and mostly studied in the Afro-Asiatic Blepharisma japonicum. The present work describes the bioactivity of pigments from the Brazilian Blepharisma sinuosum. Comparative analyses showed that the pigments from both species can trigger photo-induced modifications in phospholipids, but different redox properties and biological activities were assigned for each pigment blend. Stronger activities were detected for B. sinuosum pigments, with the lethal concentration LC50 10 × lower than B. japonicum pigments in light-irradiated tests against Bacillus cereus and less than half for treatments on the human HeLa tumor cells. HPLC showed B. sinuosum producing a simpler pigment blend, mostly with the blepharismin-C (~ 70%) and blepharismin-E (~ 30%) types. Each blepharismin engaged a specific dose-response profile on sensitive cells. The blepharismin-B and blepharismin-C were the most toxic pigments, showing LC50 ~ 2.5-3.0 µm and ~ 100 µm on B. cereus and HeLa cells, respectively, after illumination. Similarity clustering analysis compiling the bioactivity data revealed two groups of blepharismins: the most active, B and C, and the less active, A, D and E. The B. sinuosum pigment blend includes one representative of each clade. Functional and medical implications are discussed.
Collapse
Affiliation(s)
- Jéssica Cavaleiro
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil.,Biofunctional Nanodevices Development Group, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil
| | - Nathally B Oliveira
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil.,Biofunctional Nanodevices Development Group, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil
| | - Talita A Ribeiro
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil.,Biofunctional Nanodevices Development Group, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil
| | - Lohaine F Guimarães
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil.,Biofunctional Nanodevices Development Group, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil
| | - Noemi M Fernandes
- Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil
| | - Inácio D da Silva-Neto
- Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil
| | - Flávia Marszaukowski
- Departamento de Química, Universidade Estadual de Ponta Grossa, UEPG, Ponta Grossa, Brazil
| | - Karen Wohnrath
- Departamento de Química, Universidade Estadual de Ponta Grossa, UEPG, Ponta Grossa, Brazil
| | - Cleber B Barreto
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, IFRJ, Rio de Janeiro, Brazil
| | - Michael Schweikert
- Institute for Biomaterials and Biomolecular Systems, Department of Biobased Materials, University of Stuttgart, Stuttgart, Germany
| | - Giulio Petroni
- Dipartimento di Biologia, Unità di Protistologia, Università di Pisa, Pisa, Italy
| | - Claudio Ortenzi
- Dipartimento di SFBCT, Laboratorio di Protistologia e Didattica della Biologia, Università di Macerata, UNIMC, Macerata, Italy
| | - Federico Buonanno
- Dipartimento di SFBCT, Laboratorio di Protistologia e Didattica della Biologia, Università di Macerata, UNIMC, Macerata, Italy
| | - Paulo H S Picciani
- Biofunctional Nanodevices Development Group, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil.,Instituto de Macromoléculas Eloisa Mano, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil
| | - Osvaldo N Oliveira
- Instituto de Física de São Carlos, Universidade de São Paulo, USP, São Paulo, Brazil
| | - Carlos Augusto G Soares
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil.,Biofunctional Nanodevices Development Group, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil
| |
Collapse
|