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Quinones in Antimicrobial Activity
Research Guide

What is Quinones in Antimicrobial Activity?

Quinones in antimicrobial activity refers to the study of quinone compounds, such as naphthoquinones like shikonin and lapachol, that disrupt bacterial membranes, inhibit enzymes, and synergize with antibiotics against resistant pathogens.

Researchers investigate natural quinones from plants and marine sources for their broad-spectrum antibacterial, antifungal, and antituberculosis effects. Key examples include shikonin from Lithospermum erythrorhizon (Andújar et al., 2013, 281 citations) and lapachol from Tabebuia avellanedae (Hussain et al., 2007, 219 citations). Over 20 papers in the provided lists highlight their roles in ROS-mediated immunity and marine pharmacology (Mayer et al., 2013, 430 citations).

Curated Papers

Key Challenges

Why It Matters

Quinones address antimicrobial resistance by targeting biofilms and persistent infections, as seen in marine compounds with antibacterial activities (Mayer et al., 2013). Shikonin demonstrates efficacy against bacterial and fungal pathogens through naphthoquinone mechanisms (Andújar et al., 2013). Thymoquinone from Nigella sativa enhances antibiotic synergy and reduces inflammation in resistant models (Amin and Hosseinzadeh, 2015; Goyal et al., 2017). These properties position quinones as scaffolds for new drugs amid rising resistance.

Key Research Challenges

Toxicity Optimization

Quinones like lapachol exhibit potent antimicrobial effects but cause cytotoxicity at therapeutic doses (Hussain et al., 2007). Balancing efficacy against mammalian cells remains difficult. Structural modifications are needed to reduce ROS overproduction (Herb and Schramm, 2021).

Resistance Development

Bacterial adaptation to quinone-induced enzyme inhibition leads to reduced long-term efficacy. Synergy with antibiotics shows promise but requires pathogen-specific optimization (Mayer et al., 2013). Biofilm penetration poses additional barriers (Andújar et al., 2013).

Scalable Extraction

Natural sources like Zicao yield low shikonin quantities for clinical trials (Andújar et al., 2013). Synthetic analogs face stereochemistry and yield issues. Standardization across marine and plant extracts is inconsistent (Mayer et al., 2013).

Essential Papers

Functions of ROS in Macrophages and Antimicrobial Immunity

Marc Herb, Michael Schramm · 2021 · Antioxidants · 556 citations

Reactive oxygen species (ROS) are a chemically defined group of reactive molecules derived from molecular oxygen. ROS are involved in a plethora of processes in cells in all domains of life, rangin...

Naturally occurring anti-cancer compounds: shining from Chinese herbal medicine

Hua Luo, Chi Teng Vong, Hanbin Chen et al. · 2019 · Chinese Medicine · 549 citations

A Review on Anti-Inflammatory Activity of Monoterpenes

Rita de Cássia da Silveira e Sá, Luciana Dantas Farias de Andrade, Damião Pergentino de Sousa · 2013 · Molecules · 518 citations

Faced with the need to find new anti-inflammatory agents, great effort has been expended on the development of drugs for the treatment of inflammation. This disorder reduces the quality of life and...

Marine Pharmacology in 2009–2011: 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

Alejandro M. S. Mayer, Abimael D. Rodrı́guez, Orazio Taglialatela‐Scafati et al. · 2013 · Marine Drugs · 430 citations

The peer-reviewed marine pharmacology literature from 2009 to 2011 is presented in this review, following the format used in the 1998–2008 reviews of this series. The pharmacology of structurally-c...

Imidazoles as potential anticancer agents

Imran Ali, Mohammad Nadeem Lone, H. Y. Aboul‐Enein · 2017 · MedChemComm · 387 citations

Cancer is a black spot on the face of humanity in this era of science and technology.

Pharmacological Properties of Shikonin – A Review of Literature since 2002

Isabel Andújar, José Luis Rı́os, Rosa M. Giner et al. · 2013 · Planta Medica · 281 citations

The naphthoquinone shikonin is the main active principle of Zicao, a traditional Chinese herbal medicine made from the dried root of Lithospermum erythrorhizon. Studies carried out over the past 30...

Black Cumin (Nigella sativa) and Its Active Constituent, Thymoquinone: An Overview on the Analgesic and Anti-inflammatory Effects

Bahareh Amin, Hossein Hosseinzadeh · 2015 · Planta Medica · 270 citations

For many centuries, seeds of Nigella sativa (black cumin), a dicotyledon of the Ranunculaceae family, have been used as a seasoning spice and food additive in the Middle East and Mediterranean area...

Reading Guide

Foundational Papers

Start with Andújar et al. (2013, 281 citations) for shikonin pharmacology and Hussain et al. (2007, 219 citations) for lapachol overview, as they establish naphthoquinone mechanisms. Mayer et al. (2013, 430 citations) covers marine quinone-like antibacterials.

Recent Advances

Study Goyal et al. (2017, 235 citations) on thymoquinone development and Herb and Schramm (2021, 556 citations) on ROS immunity for current antimicrobial contexts.

Core Methods

Core techniques are redox cycling assays, broth microdilution for MICs, and biofilm disruption models, as used in shikonin (Andújar et al., 2013) and marine studies (Mayer et al., 2013).

How PapersFlow Helps You Research Quinones in Antimicrobial Activity

Discover & Search

PapersFlow's Research Agent uses searchPapers and exaSearch to find quinone-focused papers like 'Pharmacological Properties of Shikonin' (Andújar et al., 2013), then citationGraph reveals connections to lapachol studies (Hussain et al., 2007) and marine antibacterials (Mayer et al., 2013). findSimilarPapers expands to thymoquinone works (Goyal et al., 2017).

Analyze & Verify

Analysis Agent employs readPaperContent on shikonin reviews (Andújar et al., 2013) and verifyResponse with CoVe to confirm ROS mechanisms against Herb and Schramm (2021). runPythonAnalysis extracts MIC values from tables via pandas for statistical comparison of quinone potencies. GRADE grading scores evidence strength for antimicrobial claims.

Synthesize & Write

Synthesis Agent detects gaps in quinone synergy data across papers, flagging contradictions in toxicity profiles. Writing Agent uses latexEditText and latexSyncCitations to draft sections citing Andújar et al. (2013), then latexCompile generates a review PDF. exportMermaid visualizes quinone mechanism pathways from literature.

Use Cases

"Compare MIC values of shikonin vs lapachol against MRSA from papers."

Research Agent → searchPapers('shikonin lapachol MIC MRSA') → Analysis Agent → runPythonAnalysis(pandas extraction, matplotlib plots) → outputs comparative MIC heatmap and stats.

"Draft LaTeX section on naphthoquinone synergies with antibiotics."

Synthesis Agent → gap detection on Andújar (2013) + Goyal (2017) → Writing Agent → latexEditText + latexSyncCitations → latexCompile → outputs formatted LaTeX PDF with figures.

"Find GitHub repos analyzing quinone structure-activity relationships."

Research Agent → paperExtractUrls from Mayer (2013) → paperFindGithubRepo → githubRepoInspect → outputs repo code for SAR models and datasets.

Automated Workflows

Deep Research workflow scans 50+ papers on quinones, chaining searchPapers → citationGraph → structured report on antimicrobial trends from shikonin to marine sources. DeepScan applies 7-step analysis with CoVe checkpoints to verify lapachol efficacy claims (Hussain et al., 2007). Theorizer generates hypotheses on ROS synergy from Herb (2021) and Andújar (2013).

Try Doxa for Quinones in Antimicrobial Activity Research

Frequently Asked Questions

What defines quinones in antimicrobial activity?

Quinones are oxidized p-benzoquinone derivatives like naphthoquinones that kill microbes via redox cycling, membrane disruption, and enzyme inhibition, as in shikonin (Andújar et al., 2013).

What are key methods for studying quinone antimicrobials?

Methods include MIC assays, ROS quantification, and synergy testing with antibiotics, detailed in marine pharmacology reviews (Mayer et al., 2013) and shikonin studies (Andújar et al., 2013).

What are the most cited papers?

Top papers are Mayer et al. (2013, 430 citations) on marine antibacterials, Andújar et al. (2013, 281 citations) on shikonin, and Hussain et al. (2007, 219 citations) on lapachol.

What open problems exist?

Challenges include reducing host toxicity, preventing resistance, and scaling production, as quinones generate excessive ROS (Herb and Schramm, 2021; Hussain et al., 2007).