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Open research questions in Marine Sponges and Natural Products

141 gap statements mined from Marine Sponges and Natural Products papers in our 4.5M-paper local library, which holds 406 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • Research on the nine sponge specimens has been minimal. There is a need to investigate the microbial community of Korean sponge species. The study aims to fill this gap by characterizing the microbial communities of nine Korean sponge species.

    Microbial Community Characterization of Nine Korean Sponge Species from Gageodo Island · 2026 · DOI

  • The paper does not explicitly state the technical or domain challenges, but it can be inferred that understanding the chemistry of boron-steroid complexation in marine systems is a challenge. The complexity of the marine environment and the presence of boron in seawater may pose challenges. The paper discusses the need for a detailed understanding of steroid conformation, which may be a challenge.

    Life with Boron: Steroid Architecture and the Chemistry of Marine Boronosteroids · 2026 · DOI

  • The study highlights the need for further research to determine the therapeutic potential of these compounds. The authors also mention that further investigation will be required to determine whether some compounds will contribute to a particular therapeutic category.

    Marine Pharmacology in 2022–2023: Marine Compounds with Antibacterial, Antidiabetic, Antifungal, Anti-Inflammatory, Antiprotozoal, Antituberculosis and Antiviral Activities, Affecting the Immune and Nervous Systems, and Other Miscellaneous Mechanisms of Action · 2026 · DOI

  • It highlights the need for further research on the translation of marine-derived compounds from research to clinical trials.

    Marine-Derived Defenses Against HIV: Emerging Bioactive Molecules from the Seas · 2026 · DOI

  • The taxonomic and chemical diversity documented in polar regions has been constrained by a focus on accessible microbial and fungal lineages. A limited number of sponge taxa have been explored, leaving significant portions of the polar biological repertoire unexplored. There is a need for a transition toward mechanism-oriented discovery to bridge the existing knowledge gap.

    Bioactive Secondary Metabolites at the Ends of the Earth (2015–2025): Insights into Arctic and Antarctic Aquatic Sources · 2026 · DOI

  • The development of novel anticancer drugs is hindered by the limitations of current treatments. There is a need for a systematic review of MNPs with reported anticancer activities. The paper identifies a gap in the understanding of the potential of Marine Natural Products as anticancer agents.

    Marine Natural Products as Potent Anticancer Agents (2020–2024): Structural Diversity, SARs and Target Prediction · 2026 · DOI

  • The gap is related to the need for new therapeutic strategies that address the abnormalities of hepatic lipid metabolism.

    Ghardaqenoids A–F: Six New Diterpenoids from the South China Sea Soft Coral Heteroxenia ghardaqensis with Lipid-Lowering Activity via the Activation of the AMPK Signaling Pathway · 2026 · DOI

  • The hydrophobicity of carotenoids limits their solubility and stability in aqueous systems. The need to overcome antimicrobial resistance mechanisms. The challenge of characterizing the structure and function of carotenoproteins in marine organisms.

    Biophysical Characterization of a Carotenoprotein from Marine Sponge Tedania ignis Reveals Pigment-Dependent Stability and Antibiotic Interactions · 2026 · DOI

  • Existing treatment strategies have limitations such as pronounced side effects and a single-target approach. Active substances found in oceans generally exist as mixtures of diverse chemical components, making it difficult to ascertain which specific active components are genuinely effective.

    Research Progress on Marine Active Substances in Improving Atherosclerosis · 2026 · DOI

  • The need for a comprehensive understanding of the bidirectional crosstalk between the nervous system and malignancies. The lack of effective therapeutic agents that can intervene in this crosstalk. The potential of marine-derived bioactive molecules to address this gap.

    The Potential and Prospects of Marine Drugs in Intervening Nerve–Tumor Crosstalk · 2026 · DOI

  • Purification and subsequent confirmation and mechanistic studies of the cytotoxic metabolites are required. Further studies on the anticancer potential of metabolites produced by Aspergillus species.

    Cytotoxic Potential of Marine-Derived Fungi Isolated from Sponges and Brown Algae of Mauritius · 2026 · DOI

  • There is a lack of studies on the chemical profile of the species G. microspinosa. Prior studies have not investigated the cytotoxicity of compounds from G. microspinosa against DPM cell lines.

    Cytotoxic Microspinosamides from the Marine Sponge Geodia microspinosa That Decrease Diffuse Pleural Mesothelioma Viability · 2026 · DOI

  • The lack of understanding of the biosynthetic origin of manzamine alkaloids. The need for further exploration of the chemical diversity, biosynthetic relationships, and biological properties of manzamine alkaloids. The limited knowledge of the structural modifications of (+)-manzamine A.

    Proposed Biosynthesis and Molecular Targets of Manzamine Alkaloids from Acanthostrongylophora ingens (Phylum Porifera: Class Demospongiae) · 2026 · DOI

  • The limited availability and stability of the isolated compounds. The need to develop a comprehensive biosynthetic model for the formation of the macrocarpane skeleton. The challenge of investigating the biosynthetic capabilities of Laurencia microcladia.

    Macrocarpane-Type Sesquiterpenes from Laurencia microcladia · 2026 · DOI

  • The paper does not explicitly state a research gap, but it implies that there is a need to explore the bioactive natural products from marine corals, specifically polyhydroxysteroids. The paper also highlights the importance of investigating the bioactivities of polyhydroxysteroids.

    Further Polyhydroxysteroids from the South China Sea Soft Coral Sarcophyton sp. · 2026 · DOI

  • The need to define the relationship between the anti-inflammatory activity of heteronemin and its effects on cell viability. The challenge of developing novel therapeutic agents that can modulate inflammatory signaling pathways without adverse effects.

    Heteronemin Attenuates LPS-Induced Oxidative Stress and Inflammatory Responses in RAW264.7 Macrophages · 2026 · DOI

  • The lack of understanding of the direct regulatory effects of heteronemin on inflammatory mediator production in activated macrophages. The need for novel therapeutic agents capable of modulating inflammatory signaling pathways. The limited efficacy and adverse effects of current anti-inflammatory drugs and biological therapies.

    Heteronemin Attenuates LPS-Induced Oxidative Stress and Inflammatory Responses in RAW264.7 Macrophages · 2026 · DOI

  • The limited effectiveness of conventional therapies due to tumor resistance and low drug specificity. The need to develop more effective and selective anticancer therapies. The challenge of exploring new sources of biologically active compounds with potential therapeutic applications.

    Nudibranchs as Sources of Marine Natural Products with Antitumor Activity: A Comprehensive Review · 2025 · DOI

  • Integrate chemical characterization of borate-binding motifs with biological assays to determine whether boron coordination enhances, attenuates, or redirects the biological activity of marine steroids - Explore the ecological and physiological roles of boron-steroid interactions in vivo - Consider boron speciation during isolation, structural characterization…

    Life with Boron: Steroid Architecture and the Chemistry of Marine Boronosteroids · 2026 · DOI

  • Identification of possible hit compounds will bridge the gap between natural product chemistry and synthetic chemistry, - Further research on the mechanisms of action of marine-derived compounds…

    Marine-Derived Defenses Against HIV: Emerging Bioactive Molecules from the Seas · 2026 · DOI

  • The exploration of potential molecular targets of MNPs remains relatively scarce, - Recent research on marine-derived anti-tumor active molecules has primarily focused on activity…

    Marine Natural Products as Potent Anticancer Agents (2020–2024): Structural Diversity, SARs and Target Prediction · 2026 · DOI

  • Improving methods for separation, purification, and identification of active components, - Developing novel dosage forms to augment the solubility and bioavailability of natural…

    Research Progress on Marine Active Substances in Improving Atherosclerosis · 2026 · DOI

  • Integrated, interdisciplinary collaboration to enable transformative breakthroughs in the development of marine neuropharmacological agents, - Further investigations into marine-derived TRPV1 modulators for pain management, - Research and development of analgesic drugs using marine-derived…

    The Potential and Prospects of Marine Drugs in Intervening Nerve–Tumor Crosstalk · 2026 · DOI

  • The study only evaluated the antioxidant and toxicological activities of the extracts, - The study did not investigate the specific mechanisms of action of the extracts, - The study only used in vitro and in vivo assays with limited sample…

    Chemical, Antioxidant and Toxicological Profile of the Tropical Marine Sponges Suberites aurantiacus, Mycale angulosa and Halichondrida from Brazil · 2026 · DOI

  • Further studies on the bioactive potential of the extracts, - Investigation of the specific mechanisms of action of the extracts, - Evaluation of the extracts in clinical…

    Chemical, Antioxidant and Toxicological Profile of the Tropical Marine Sponges Suberites aurantiacus, Mycale angulosa and Halichondrida from Brazil · 2026 · DOI

Most-cited papers in Marine Sponges and Natural Products

Most recent work

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Open questions raised by papers listed on this page include: (1) There is a need to investigate the microbial community of Korean sponge species (“Microbial Community Characterization of Nine Korean Sponge Species from Gageodo…”, 2026); (2) The authors also mention that further investigation will be required to determine whether some compounds will contribute to a particular therapeutic category (“Marine Pharmacology in 2022–2023: Marine Compounds with Antibacterial,…”, 2026); (3) There is a need for a transition toward mechanism-oriented discovery to bridge the existing knowledge gap (“Bioactive Secondary Metabolites at the Ends of the Earth (2015–2025): Insights…”, 2026); (4) There is a need for a systematic review of MNPs with reported anticancer activities (“Marine Natural Products as Potent Anticancer Agents (2020–2024): Structural…”, 2026); (5) The lack of effective therapeutic agents that can intervene in this crosstalk (“The Potential and Prospects of Marine Drugs in Intervening Nerve–Tumor Crosstalk”, 2026). 141 gap statements have been mined from Marine Sponges and Natural Products papers in our 4.5M-paper local library, which holds 406 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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