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Anticancer Drug Discovery Based on Natural Products

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Pharmacology".

Deadline for manuscript submissions: closed (20 June 2025) | Viewed by 10356

Special Issue Editor

Special Issue Information

Dear Colleagues,

Cancer remains a leading cause of death worldwide, and the development of new and effective anticancer drugs is urgently needed. Natural products have a long history of use in traditional medicine, and they have been the inspiration for many modern drugs, including anticancer agents. The vast chemical diversity found in nature provides a rich source of novel structures that can be exploited for the development of new drugs with improved efficacy and safety profiles.

In recent years, there has been growing interest in the discovery of anticancer drugs based on natural products. This is due to several factors, including the increasing prevalence of cancer, the limited efficacy of current treatments, and the need for new drugs that are less toxic and have fewer side effects.

Natural products offer several advantages for the discovery of anticancer drugs. They are typically well tolerated by the body, they often have multiple mechanisms of action, and they can be used in combination with other drugs to improve efficacy and reduce toxicity.

We are inviting submissions to this Special Issue of IJMS, titled "Anticancer Drug Discovery Based on Natural Products".

Suggested topics of interest for this Special Issue include, but are not limited to, the following:

  • Discovery of novel anticancer agents from natural sources;
  • Preclinical and clinical studies of natural products for cancer treatment;
  • Mechanisms of action of natural products in cancer cells;
  • Development of natural product-based combination therapies for cancer;
  • Natural products for cancer prevention and chemoprevention.

Prof. Dr. Su-Yun Lyu
Guest Editor

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Keywords

  • anticancer drug discovery
  • natural products
  • phytochemicals
  • traditional medicine
  • drug development
  • preclinical studies
  • clinical trials

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Published Papers (6 papers)

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Research

17 pages, 4963 KiB  
Article
Characterization and Functional Analysis of a Novel Fungal Immunomodulatory Protein Gene from Ganoderma leucocontextum in B16-F10 Mouse Melanoma Cells
by Jiayi Yang, Mengyuan Jin, Lida Zhang, Yingying Wu and Xuanwei Zhou
Int. J. Mol. Sci. 2025, 26(11), 5063; https://doi.org/10.3390/ijms26115063 - 24 May 2025
Viewed by 466
Abstract
Ganoderma leucocontextum, a newly identified species from the Tibetan Plateau, has been mainly studied for its polysaccharides and triterpenoids, with no prior reports on fungal immunomodulatory proteins (FIPs). This study explores the biological activity of FIP-gle2, cloned from G. leucocontextum and expressed [...] Read more.
Ganoderma leucocontextum, a newly identified species from the Tibetan Plateau, has been mainly studied for its polysaccharides and triterpenoids, with no prior reports on fungal immunomodulatory proteins (FIPs). This study explores the biological activity of FIP-gle2, cloned from G. leucocontextum and expressed in Pichia pastoris. The effects and mechanisms of recombinant FIP-gle2 (rFIP-gle2) on cell activity and melanin synthesis in mouse melanoma B16-F10 cells were investigated in vitro. The results showed that the FIP-gle2 gene, with an open reading frame (ORF) of 333 bp, encodes a 111-amino acid polypeptide with a molecular weight of 12.60 kDa and an isoelectric point of 4.48. We achieved a yield of 184.18 mg/L of rFIP-gle2. In vitro functional experiments showed that rFIP-gle2 significantly inhibited the proliferation of B16-F10 melanoma cells and induced apoptosis in a dose-dependent manner, particularly at concentrations above 1 μg/mL. At 3 μg/mL, rFIP-gle2 effectively inhibited tyrosinase activity and reduced melanin content, downregulating microphthalmia-associated transcription factor (MITF), tyrosinase (TYR), and tyrosinase-related proteins (TRP-1 and TRP-2). Furthermore, RNA-seq analysis indicated that differentially expressed genes in treated cells were enriched in the mitogen-activated protein kinase (MAPK) signaling pathway, with Western blotting confirming enhanced phosphorylation of JNK, ERK, and p38 proteins. Thus, P. pastoris is an effective host for rFIP-gle2 production, which shows potential for applications in pharmaceuticals, cosmeceuticals, and food fields. Full article
(This article belongs to the Special Issue Anticancer Drug Discovery Based on Natural Products)
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16 pages, 4135 KiB  
Article
Anti-Tumorigenic Effects of Sea Buckthorn Root Extracts on Head and Neck Cancer Cells—A Systematic Analysis
by Alina Gazizova, Manuel Gronbach, Christina Oppermann, Udo Kragl and Nadja Engel
Int. J. Mol. Sci. 2025, 26(10), 4625; https://doi.org/10.3390/ijms26104625 - 12 May 2025
Viewed by 514
Abstract
Chemotherapy is a common treatment method for cancer that is often associated with strong side effects. To reduce these, research on extracts from medicinal plants and their active ingredients has been conducted. Although sea buckthorn (Hippophae rhamnoides) is a well-established medicinal [...] Read more.
Chemotherapy is a common treatment method for cancer that is often associated with strong side effects. To reduce these, research on extracts from medicinal plants and their active ingredients has been conducted. Although sea buckthorn (Hippophae rhamnoides) is a well-established medicinal plant, little is known about the chemical components responsible for its putative anticancer activity. This study focuses on both chemical and medical analyses of methanolic sea buckthorn root extracts. Cell viability measurements were performed on head and neck cancer cell lines, as well as non-tumorigenic control cells. Microwave and classical extractions under reflux were used to prepare the methanolic extracts. LC/MS and NMR were used to determine the structures of the molecules contained within these extracts. The aqueous phase of one sea buckthorn root extract reduced the viability of cancer cells, whereas the viability of non-tumorigenic control cells remained unaltered. The cell cycle phases of cancer cells treated with the extract shifted in comparison to control treatment. After 24 h, the number of cells in proliferative phases had increased. Two fractions of the extract that evoked alterations were identified. After a 48 h treatment, one of the fractions showed a higher number of apoptotic cells than the control. LC/MS and NMR analyses were conducted to attempt to identify the active compounds. We propose that the bioactivity of this extract is caused by a mixture of 2′-hydroxyflavone isomers. Full article
(This article belongs to the Special Issue Anticancer Drug Discovery Based on Natural Products)
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17 pages, 3391 KiB  
Article
Mechanism of Action and Interaction of Garlic Extract and Established Therapeutics in Prostate Cancer
by Marco Hoffmann, Jana Sauer, Marie Book, Thomas Frank Ermler, Petra Fischer, Sven Gerlach, Kareem Beltagi, Agnieszka Morgenroth, Radu Alexa, Jennifer Kranz and Matthias Saar
Int. J. Mol. Sci. 2025, 26(4), 1777; https://doi.org/10.3390/ijms26041777 - 19 Feb 2025
Viewed by 2836
Abstract
A detailed characterization of the mechanism of action of garlic extract (GE) on prostate cancer (PCa) cells is essential to ensure its safe use as a complementary therapy, particularly when combined with established treatments. A case report highlighted the potential benefits of GE [...] Read more.
A detailed characterization of the mechanism of action of garlic extract (GE) on prostate cancer (PCa) cells is essential to ensure its safe use as a complementary therapy, particularly when combined with established treatments. A case report highlighted the potential benefits of GE in PCa management. A patient diagnosed with PCa, presenting an initial prostate-specific antigen (PSA) of 11.8 ng/mL, maintained PSA levels between 3.5 and 6 ng/mL for over 14 years with daily GE intake. To study GE’s anti-proliferative effects and interactions with established therapeutics, healthy prostate epithelial cells (PNT2) and PCa cells (LNCaP, PC3, VCaP) were treated with GE. Proliferation, Integrin β1 pattern, DNA-damage, as well as androgen receptor (AR) and Cytochrome P450 (CYP450) expression were investigated. GE reduced the proliferation of LNCaP and PC3 cells compared to healthy PNT2 cells but had contrary effects on VCaP cells. The combination of GE with standard therapies, including chemotherapy, androgen deprivation therapy (ADT), and Poly-(ADP-ribose)-Polymerase inhibitors (PARPi), reduced the efficacy of these treatments in tumor cells, potentially due to the GE-induced upregulation of the metabolic enzyme CYP2C9 in PCa cell lines. These findings indicate that while GE has anti-proliferative effects, the use of highly concentrated natural extracts must be carefully assessed by expert physicians on a case-by-case basis, especially when combined with established therapies. Full article
(This article belongs to the Special Issue Anticancer Drug Discovery Based on Natural Products)
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18 pages, 5161 KiB  
Article
Therapeutic Potential of Adina rubella Hance Stem and Picroside III as a Differentiation Inducer in AML Cells via Mitochondrial ROS Accumulation
by Chan-Seong Kwon, Byeol-Eun Jeon, Ji-Eun Lee, Hyeon-Young Kim, Ryun-Young Kang, Keun-Hu Kim, Eun-Ju Lee, Ju-Yeon Jang, Tae-Jin Kim, Ho-Jin Shin and Sang-Woo Kim
Int. J. Mol. Sci. 2025, 26(3), 1350; https://doi.org/10.3390/ijms26031350 - 5 Feb 2025
Viewed by 2953
Abstract
Acute myeloid leukemia (AML) is characterized by the accumulation of immature myeloid cells and a differentiation block, highlighting the urgent need for novel differentiation-inducing therapies. This study evaluated Adina rubella Hance (ARH) stem as a potent differentiation inducer by systematically screening 200 plant [...] Read more.
Acute myeloid leukemia (AML) is characterized by the accumulation of immature myeloid cells and a differentiation block, highlighting the urgent need for novel differentiation-inducing therapies. This study evaluated Adina rubella Hance (ARH) stem as a potent differentiation inducer by systematically screening 200 plant extracts. ARH stem promoted phenotypic differentiation in AML cells. In addition to its differentiation-inducing effects, ARH stem exhibited strong antileukemic activities, such as inhibiting cell proliferation, inducing cell death, and enhancing mitochondrial reactive oxygen species (mtROS) levels, the latter of which is critical for its differentiation-promoting activity. Comparative analysis with the extracts from other parts of the plant confirmed the superior efficacy of the stem extract because of its unique chemical composition. Ultra-high-performance liquid chromatography combined with quadrupole time-of-flight mass spectrometry analysis identified Picroside III as a major active compound within the stem extract, capable of recapitulating ARH stem-induced differentiation and demonstrating significant antileukemic properties. These findings underscore the therapeutic potential of ARH stem and its active component, Picroside III, as promising agents for differentiation-based treatment strategies in AML. Full article
(This article belongs to the Special Issue Anticancer Drug Discovery Based on Natural Products)
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16 pages, 2597 KiB  
Article
Enhanced Photodynamic Therapy Efficacy through Solid Lipid Nanoparticle of Purpurin-18-N-Propylimide Methyl Ester for Cancer Treatment
by Sooho Yeo, Huiqiang Wu, Il Yoon, Hye-Soo Kim, Young Kyu Song and Woo Kyoung Lee
Int. J. Mol. Sci. 2024, 25(19), 10382; https://doi.org/10.3390/ijms251910382 - 26 Sep 2024
Cited by 1 | Viewed by 1107
Abstract
Photodynamic therapy (PDT) is an innovative cancer treatment that utilizes light. When light irradiates, purpurin-18-N-propylimide methyl ester (P18 N PI ME) generates reactive oxygen species that destroy cancer cells. The hydrophobic nature of P18 N PI ME presents challenges regarding its aggregation in [...] Read more.
Photodynamic therapy (PDT) is an innovative cancer treatment that utilizes light. When light irradiates, purpurin-18-N-propylimide methyl ester (P18 N PI ME) generates reactive oxygen species that destroy cancer cells. The hydrophobic nature of P18 N PI ME presents challenges regarding its aggregation in the body, which can affect its effectiveness. This study aimed to enhance the bioavailability and effectiveness of cancer treatment by synthesizing P18 N PI ME and formulating P18 N PI ME-loaded solid lipid nanoparticles (SLNs). The efficacy of PDT was estimated using the 1,3-diphenylisobenzofuran (DPBF) assay and photocytotoxicity tests on the HeLa (human cervical carcinoma) and A549 (human lung carcinoma) cell lines. The P18 N PI ME-loaded SLNs demonstrated particle sizes in the range of 158.59 nm to 248.43 nm and zeta potentials in the range of –15.97 mV to –28.73 mV. These SLNs exhibited sustained release of P18 N PI ME. DPBF analysis revealed enhanced PDT effects with SLNs containing P18 N PI ME compared with standalone P18 N PI MEs. Photocytotoxicity assays indicated toxicity under light irradiation but no toxicity in the dark. Furthermore, the smallest-sized formulation exhibited the most effective photodynamic activity. These findings indicate the potential of P18 N PI ME-loaded SLNs as promising strategies for PDT in cancer therapy. Full article
(This article belongs to the Special Issue Anticancer Drug Discovery Based on Natural Products)
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21 pages, 4910 KiB  
Article
Modulation of Breast Cancer Cell Apoptosis and Macrophage Polarization by Mistletoe Lectin in 2D and 3D Models
by Chang-Eui Hong and Su-Yun Lyu
Int. J. Mol. Sci. 2024, 25(15), 8459; https://doi.org/10.3390/ijms25158459 - 2 Aug 2024
Cited by 3 | Viewed by 1527
Abstract
Korean mistletoe (Viscum album L. var. coloratum) is renowned for its medicinal properties, including anti-cancer and immunoadjuvant effects. This study aimed to elucidate the mechanisms by which Korean mistletoe lectin (V. album L. var. coloratum agglutinin; VCA) modulates breast cancer [...] Read more.
Korean mistletoe (Viscum album L. var. coloratum) is renowned for its medicinal properties, including anti-cancer and immunoadjuvant effects. This study aimed to elucidate the mechanisms by which Korean mistletoe lectin (V. album L. var. coloratum agglutinin; VCA) modulates breast cancer cell apoptosis and macrophage polarization. The specific objectives were to (1) investigate the direct effects of VCA on MCF-7 breast cancer cells and THP-1-derived M1/M2 macrophages; (2) analyze the impact of VCA on the paracrine interactions between these cell types; and (3) compare the efficacy of VCA in 2D vs. 3D co-culture models to bridge the gap between in vitro and in vivo studies. We employed both 2D and 3D models, co-culturing human M1/M2 macrophages with human MCF-7 breast cancer cells in a Transwell system. Our research demonstrated that M1 and M2 macrophages significantly influenced the immune and apoptotic responses of breast cancer cells when exposed to VCA. M1 macrophages exhibited cytotoxic characteristics and enhanced VCA-induced apoptosis in both 2D and 3D co-culture models. Conversely, M2 macrophages initially displayed a protective effect by reducing apoptosis in breast cancer cells, but this protective effect was reversed upon exposure to VCA. Furthermore, our findings illustrate VCA’s ability to modulate M1 and M2 polarization in breast cancer cells. Finally, the use of magnetic 3D cell cultures suggests their potential to yield results comparable to conventional 2D cultures, bridging the gap between in vitro and in vivo studies. Full article
(This article belongs to the Special Issue Anticancer Drug Discovery Based on Natural Products)
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