Daily Cosmetic Research Analysis
Analyzed 36 papers and selected 3 impactful papers.
Summary
Analyzed 36 papers and selected 3 impactful articles.
Selected Articles
1. Development of a novel hydroxylated recombinant human type III collagen TD-1-HrHC in Komagataella phaffii with transdermal and skin damage repair activity.
Engineered TD-1–fused, hydroxylated human type III collagen achieved a 20-fold-plus increase in in vitro transdermal transport, promoted barrier/differentiation programs in keratinocytes, and enhanced skin repair with neocollagenesis in mice. The yeast-expressed construct mirrors natural hydroxylation levels and reduced protein carbonylation, supporting dermal antioxidant effects.
Impact: This work overcomes a long-standing barrier in dermal therapeutics by enabling functional collagen to traverse the skin and act in the dermis, opening avenues for bioactive cosmeceuticals and wound-repair biologics.
Clinical Implications: Supports development of topical collagen biotherapeutics with meaningful dermal delivery for photoaging, barrier repair, and wound care; however, human safety, immunogenicity, and durability require clinical evaluation.
Key Findings
- TD-1-HrHC achieved approximately 2077% higher transdermal transport versus native collagen III in transwell assays.
- Yeast co-expression with specific hydroxylases yielded ~11.89% hydroxylation, approximating natural human type III collagen.
- Enhanced repair of damaged skin and induction of neocollagenesis were observed in a mouse model.
- Regulated barrier and differentiation factor expression and reduced protein carbonylation in HaCaT keratinocytes.
Methodological Strengths
- Rational protein engineering with scalable Komagataella phaffii expression and dual-step chromatography purification.
- Convergent evidence across in vitro transport assays, cellular functional readouts, and an in vivo mouse model.
Limitations
- Preclinical only; no human pharmacokinetics, safety, or immunogenicity data.
- Transwell transport may not fully predict in vivo percutaneous absorption; dosing and durability not detailed.
Future Directions: First-in-human studies to assess dermal delivery, safety, and efficacy; comparative studies versus existing collagen formulations; optimization of formulation and stability.
BACKGROUND: Collagen has been proven to have significant potential applications value in the fields of on medical aesthetics and cosmetics. However, due to its large molecular weight, collagen is difficult to effectively penetrate the skin barrier and reach the designated location to exert the expected activities. Transdermal peptide TD-1 is a short peptide consisting of only 11 amino acids, which can assist proteins such as insulin and cytokines to penetrate the skin barrier and reach the dermis layer. To maximize the transdermal and the efficacy of Collagen III in skincare, the shortest functional fragment that containing a triple helix structure of collagen protein fused with TD-1 were designed and evaluated for its transdermal activity, safety and efficacy. RESULTS: The recombinant protein containing transdermal TD-1 fragment and a core active fragment of human collagen III (TD-1-HrHC) was co-expressed together with specific hydroxylase using the K. phaffii expression system, the products were purified by hydrophobic interaction chromatography (HIC) and ion-exchange chromatography (IEC). The TD-1-HrHC contains about 11.89% hydroxylation modifications that are similar to the natural human collagen III. The transdermal efficiency is 2077% measured by trans-well tests compare to the nature Collagen III isolated from animals. In addition, TD-1-HrHC able to promotes skin damage repairing through regulation series of barrier factors and differentiation factors in the HaCat cell model and promotes the repair of damaged skin and induces the generation of new-born collagen in mouse model. Moreover, it also shown an excellent ability to inhibit protein carbonylation on HaCat cells. CONCLUSION: This study demonstrates that TD-1-HrHC can effectively cross the skin barrier and has profound ability to inhibit protein carbonylation of skin and promote skin damage repairing.
2. Propylparaben Exposure May Impair Uterine Decidualization via FDX1 Downregulation and Induce Preeclampsia-like Symptoms in Mice.
Continuous propylparaben exposure in pregnant mice induced hypertension and proteinuria with impaired decidualization. RNA-seq identified marked downregulation of FDX1, suggesting reduced steroidogenesis and dysregulated receptor signaling as a mechanistic basis.
Impact: Links a ubiquitous cosmetic preservative to preeclampsia-like pathology via a defined molecular node (FDX1), elevating concerns about reproductive safety.
Clinical Implications: Supports precautionary guidance to minimize paraben exposure during pregnancy and motivates biomonitoring and epidemiologic studies; may inform regulatory reassessment of propylparaben in personal care products.
Key Findings
- Pregnant mice exposed to propylparaben developed hypertension and proteinuria consistent with preeclampsia-like symptoms.
- Decidualization was impaired with a significant reduction of multinucleated decidual cells.
- RNA-seq of deciduomas showed significant downregulation of FDX1, suggesting decreased estrogen/progesterone levels and receptor target dysregulation.
Methodological Strengths
- In vivo pregnancy model capturing physiological endpoints (blood pressure, proteinuria) and tissue-level decidualization.
- Transcriptomic profiling linking phenotype to a defined molecular pathway (FDX1).
Limitations
- Translational relevance to humans uncertain; exposure levels and dose–response relative to human use not detailed in the abstract.
- Lack of rescue/causality confirmation (e.g., FDX1 restoration) and limited hormonal quantification details.
Future Directions: Human biomonitoring and pregnancy cohorts to assess PP exposure and PE risk; mechanistic validation via FDX1 rescue or conditional models; benchmark exposure studies aligned to real-world doses.
Preeclampsia (PE) is a pregnancy-specific disorder that poses a significant threat to maternal and fetal health. Its pathogenesis is regulated by multiple factors, including genetic and environmental cues, but the specific underlying mechanisms remain incompletely elucidated. Propylparaben (PP) is a widely used additive in daily products such as cosmetics and food. Previous studies have confirmed that excessive PP exposure exerts adverse effects on the reproductive system. To clarify the potential impact of PP exposure on pregnancy outcomes, this study established a continuous PP exposure model in pregnant mice. Results showed that pregnant mice in the PP group exhibited typical PE-like symptoms-hypertension and proteinuria. Concurrently, the number of multinucleated cells in uterine decidua was significantly reduced, with marked impairment of the decidualization process. To further explore the molecular mechanisms, RNA transcriptome sequencing was performed on artificially induced deciduomas. PP exposure significantly downregulated the expression of ferredoxin 1 (FDX1). Reduced FDX1 expression may decrease estrogen and progesterone levels in mice, and disrupt the normal expression of estrogen/progesterone receptors and their target genes. In summary, this study demonstrates that PP exposure may impair uterine decidualization and disturb normal placental development by inhibiting FDX1 expression, thereby inducing PE-like symptoms in pregnant mice.
3. Pyroptosis- and Necroptosis-Related Signaling in Salicylate UV Absorber-Induced Toxicity: Implications for Sustainable Chemistry and Human Health.
Salicylate UV filters (EHS, HMS) caused oxidative stress, Ca2+ dysregulation, mitochondrial dysfunction, and DNA damage in MEFs, with zebrafish corroborating in vivo toxicity. Molecular data indicate concurrent activation of pyroptosis and necroptosis, revealing dual regulated cell death mechanisms.
Impact: Identifies mechanistic pathways of cytotoxicity for widely used UV filters, informing safer-by-design sunscreen chemistry and human risk assessment.
Clinical Implications: Supports reevaluation of salicylate filters in cosmetic formulations, encourages alternative filters with lower mechanistic cytotoxicity, and motivates inclusion of pyroptosis/necroptosis endpoints in safety testing.
Key Findings
- EHS and HMS induced oxidative stress, calcium dysregulation, mitochondrial dysfunction, and DNA damage in MEFs (3T6).
- Molecular analyses suggested concurrent activation of pyroptosis and necroptosis pathways.
- Zebrafish in vivo models corroborated toxicity phenotypes observed in vitro.
Methodological Strengths
- Integration of in vitro mammalian cells and in vivo zebrafish models.
- Multiparametric assessment across oxidative stress, calcium homeostasis, mitochondrial and genomic damage, and cell death pathways.
Limitations
- Human-relevant concentrations and dermal exposure scenarios were not detailed.
- Mechanistic markers were truncated in the abstract and may require deeper validation (e.g., genetic inhibition of pathways).
Future Directions: Benchmark concentrations to human dermal exposure, evaluate alternative filters, and validate pathways via genetic/chemical inhibition; incorporate these endpoints into regulatory toxicology.
As emerging global environmental contaminants, organic ultraviolet absorbers (OUVAs) are widely used in personal care formulations and exhibit environmental persistence and potential bioaccumulation. Among these compounds, 2-ethylhexyl salicylate (EHS) and homosalate (HMS) are the most frequently used salicylate-type UV filters in cosmetic formulations. Although an increasing number of studies have demonstrated their environmental hazards, little is known about the molecular mechanisms underlying their cytotoxicity in mammalian systems, a fundamental knowledge gap for both human health protection and the development of more environmentally friendly consumer goods. In this study, we used mouse embryonic fibroblasts (MEFs, 3T6) and zebrafish as models to assess the toxicological phenotypes of EHS and HMS in vitro and in vivo, respectively. We found that both EHS and HMS induced cellular damage characterized by oxidative stress, disrupted intracellular calcium homeostasis, mitochondrial impairment, and DNA damage. Importantly, molecular analyses further suggested the concurrent activation of two distinct regulated cell death programs: pyroptosis, as suggested by