Daily Cosmetic Research Analysis
Analyzed 10 papers and selected 3 impactful papers.
Summary
Three studies advance cosmetic and dermatologic science from different angles: a case-control sequencing study links keloid severity to skin fungal dysbiosis enriched in Malassezia; a network toxicology analysis implicates hair dye chemicals in carcinogenic pathways via xenobiotic metabolism; and a first report of bioactive pigment production by Aspergillus frequens shows antibacterial, antibiofilm, and antiproliferative activity relevant to bio-based cosmetic ingredients.
Research Themes
- Cutaneous microbiome and scarring
- Cosmetic product safety and carcinogenic mechanisms
- Bio-based pigments with antimicrobial functions
Selected Articles
1. Characterization and analysis of the skin mycobiome in keloid: A case-control study.
This case-control ITS rRNA sequencing study shows that keloid lesions and even non-lesional skin have reduced fungal richness/evenness compared with healthy controls. Keloid lesions are enriched for Malassezia and depleted for several environmental genera, and Malassezia abundance correlates positively with scar severity. Community-level differences (ANOSIM) suggest dysbiosis centered on the lesion with partial spread to adjacent skin.
Impact: It provides one of the first systematic characterizations of the skin mycobiome in keloid and links Malassezia enrichment to disease severity, opening avenues for microbiome-based biomarkers and interventions.
Clinical Implications: Findings motivate exploration of adjunctive antifungal or microbiome-modulating strategies in keloid management and the development of fungal biomarkers to stratify risk and monitor response; causal studies are needed before practice change.
Key Findings
- Fungal richness and evenness were reduced in keloid lesion (KL) and non-lesional (KNL) skin compared with controls (P<0.01).
- Community composition differed: KL vs C (ANOSIM R=0.12, P=0.004), KL vs KNL (R=0.10, P=0.021); KNL vs C showed no significant separation (R=0.03, P=0.215).
- KL was enriched in Malassezia and depleted in Cladosporium, Alternaria, Aspergillus, and Debaryomyces (all P<0.05).
- Malassezia relative abundance positively correlated with keloid severity on the Vancouver Scar Scale.
Methodological Strengths
- Case-control sampling across lesion, patient-matched non-lesional, and anatomically matched control sites.
- High-throughput ITS rRNA sequencing with community diversity metrics and ANOSIM-based compositional comparisons.
Limitations
- Sample size was not reported; cross-sectional design precludes causal inference.
- Potential confounding from topical products/environment and lack of functional validation or strain-level resolution.
Future Directions: Longitudinal and interventional trials (antifungals/probiotics), strain- and metabolite-level analyses, and integration with bacteriome/immunologic profiling to define causality and therapeutic targets.
Altered skin bacteriome has been associated with keloid, yet the relation of fungal community to this disease remains unclear. This study aimed to characterize the skin mycobiome in patients with keloid and its correlation to disease severity. A case-control study was designed to investigate the fungal landscape in participants with keloid and healthy controls. Disease severity was assessed using Vancouver Scar Scale. Swabs of the keloid lesion (KL) and non-lesional (KNL) skin of keloid patients and corresponding skin sites of healthy controls (C) were obtained for ITS rRNA sequencing. Our findings revealed decreased richness and evenness in the fungal community within the KL as well as KNL groups compared to C (P < 0.01). Notably, fungal composition was more similar between KNL and C compared to KL (KL-C, ANOSIM: R=0.12, P = 0.004; KL-KNL, ANOSIM: R=0.10, P = 0.021; KNL-C, ANOSIM: R=0.03, P = 0.215). Skin mycobiome in KL was more enriched with Malassezia (P < 0.05), and depleted in Cladosporium, Alternaria, Aspergillus and Debaryomyces (P < 0.05). Correlation analysis identified a positive association between the relative abundance of Malassezia and disease severity (r
2. Network toxicology analysis of hair dye components and their association with breast and bladder cancers.
Using integrated databases, GO/KEGG enrichment, and network plus docking analyses, this study implicates major hair dye chemicals in carcinogenic processes via xenobiotic metabolism and interactions with key cancer proteins. The work frames a mechanistic hypothesis for observed epidemiologic concerns and prioritizes targets for experimental validation and risk mitigation.
Impact: It addresses a high-interest public health question in cosmetic safety with a systems approach, identifying candidate pathways that can inform toxicology testing and regulatory assessment.
Clinical Implications: While not practice-changing alone, results support cautious counseling on hair dye exposure in high-risk populations and guide selection of safer formulations pending experimental and epidemiologic confirmation.
Key Findings
- Multi-database integration with GO and KEGG enrichment identified key targets and pathways related to breast and bladder carcinogenesis.
- Network analysis and molecular docking indicate interactions between major hair dye chemicals and critical cancer-related proteins.
- Xenobiotic metabolism emerged as a central pathway through which hair dye components may induce carcinogenesis.
- Findings offer theoretical support for health risks associated with hair dye exposure and suggest preventive strategies.
Methodological Strengths
- Systems-level approach combining GO/KEGG enrichment, network analysis, and molecular docking.
- Use of multiple curated databases to triangulate targets and pathways.
Limitations
- In silico predictions without in vitro, in vivo, or epidemiologic validation.
- Human exposure levels, dose–response, and formulation-specific context were not addressed; potential database bias.
Future Directions: Experimental toxicology (cellular and animal), exposure biomonitoring, and prospective cohorts to validate risk; cheminformatics-guided reformulation to minimize hazardous interactions.
This study employed a network toxicology approach to investigate the potential toxic effects and molecular mechanisms of hair dye components in relation to breast and bladder cancer. By integrating data from multiple databases and performing Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses, key targets and pathways were identified. Network and molecular docking analyses revealed that major hair dye chemicals may induce carcinogenesis through xenobiotic metabolism and interact with critical proteins involved in cancer pathways. These findings provide theoretical support for the health risks associated with hair dye exposure and offer insights into potential preventive strategies. Cette étude a employé une approche de toxicologie des réseaux pour investiguer les effets toxiques potentiels et les mécanismes moléculaires des composants des teintures capillaires en relation avec le cancer du sein et le cancer de la vessie. En intégrant des données provenant de multiples bases de données et en réalisant des analyses d'enrichissement Gene Ontology (GO) et Kyoto Encyclopedia of Genes and Genomes (KEGG), les cibles et voies moléculaires clés ont été identifiées. Les analyses de réseau et de docking moléculaire ont révélé que les principaux produits chimiques des teintures capillaires pourraient induire la carcinogenèse via le métabolisme des xénobiotiques et interagir avec des protéines critiques impliquées dans les voies cancéreuses. Ces résultats fournissent un support théorique concernant les risques sanitaires associés à l'exposition aux teintures capillaires et offrent des perspectives pour des stratégies préventives potentielles.
3. Antibacterial, antibiofilm, and antiproliferative properties of Aspergillus frequens-derived pigment.
This first report of pigment production by Aspergillus frequens shows nanoscale pigment particles with broad antibacterial and antibiofilm activity (e.g., 66.8% biofilm suppression in K. pneumoniae) and antiproliferative effects against HOS and A549 cells, but not A431. Multimodal characterization (SEM, EDX, FT-IR, GC-MS) supports bioactivity and composition.
Impact: It identifies a new fungal source of bioactive pigments with antibacterial and antibiofilm properties, relevant to safer, functional cosmetic colorants and cosmeceuticals.
Clinical Implications: Suggests potential for naturally derived pigments with antimicrobial function in topical/cosmetic formulations; however, human safety, dermal toxicity, sensitization, and in vivo efficacy must be established before clinical use.
Key Findings
- A. frequens produced the highest pigment yield among 20 fungi (21.36 ± 1.8 AU/mL in PDB).
- Pigment particles were irregular and 40–184 nm; EDX showed high C and O; FT-IR and GC-MS detected multiple functional groups/chromophores.
- Broad antibacterial activity against 13 pathogens with MBC 4.5–16.7 mg/mL.
- Biofilm suppression reached 66.8% (Klebsiella pneumoniae) and 64.8% (Bacillus subtilis).
- Antiproliferative effects: IC50 43.3 µg/mL (HOS) and 77.1 µg/mL (A549); no effect on A431 cells.
Methodological Strengths
- Comparative screening across 20 rhizospheric fungi to identify a high-yield producer.
- Comprehensive physicochemical and bioactivity profiling (SEM, EDX, FT-IR, GC-MS, antibacterial/antibiofilm assays, cytotoxicity).
Limitations
- In vitro findings without in vivo confirmation or human safety assessment.
- Active compounds not fully isolated/identified; high effective concentrations may limit translational potential.
Future Directions: Isolation/structure elucidation of active pigments, dermal toxicity and sensitization testing, in vivo anti-biofilm efficacy, formulation stability, and scalable bioprocess development.
BACKGROUND: Filamentous fungi produce a broad spectrum of colored secondary metabolites that are largely used in various industries, including food, cosmetics, fabrics, and medications. This study explores, for the first time, the potential of Aspergillus frequens to produce pigmented secondary metabolites and their application in various biotechnological treatments. RESULTS: Aspergillus frequens (Asmaa 2024) produced the highest concentration of pigmented secondary metabolites among the 20 tested fungal rhizospheric fungi, reaching 21.36 ± 1.8 AU/mL in potato dextrose broth (PDB) medium. Scanning electron microscopy (SEM) revealed that the extracted pigment has an irregular shape and particle size, ranging from 40 to 184 nm. The elemental composition revealed the presence of high ratios of carbon and oxygen using energy-dispersive X-ray (EDX). Many functional groups and chromophore compounds have been detected in the extracted pigment using Fourier-transform infrared spectroscopy (FT-IR) and gas chromatography-mass spectrometry (GC-MS). Thirteen pathogenic species of bacteria were significantly inhibited in their development by the colored metabolites, whose minimum bactericidal concentrations (MBCs) varied from 4.5 to 16.7 mg/mL. The most notable percentages in suppression biofilm development, suggesting a major influence, were 66.8% for Klebsiella pneumoniae and 64.8% for Bacillus subtilis using the microtiter plate technique. Following assessment of zeta potential, particle size, and polydispersity index (PDI) of the target bacteria, the effective antibacterial efficacy of the pigmented secondary metabolites was confirmed. The viability of the osteosarcoma (HOS) and lung cancer (A549) cell lines was significantly diminished by the A. frequens' secondary metabolites, with IC50 values of 43.3 and 77.1 µg/mL, respectively. In contrast, the skin cancer cell line (A431) showed no signs of impact, using the MTT assay. CONCLUSION: Based on the obtained findings, A. frequens pigmented secondary metabolites have promising potential in the biological control of pathogenic and biofilm-forming bacteria, as well as in the treatment of bone and lung cancer. While numerous studies have investigated pigment production in Aspergillus species, this research represents the first investigation into pigment synthesis by A. frequens.