Daily Cosmetic Research Analysis
Analyzed 2 papers and selected 2 impactful papers.
Summary
Two studies highlight advances spanning cosmetic outcomes in oncoplastic breast surgery and process-informed design in hot-melt extrusion. A retrospective cohort using chest wall perforator flaps for upper inner quadrant defects achieved high objective and patient-reported cosmetic results with acceptable complications, while a mechanistic pharmaceutics study shows thermodynamics alone cannot predict solid-state outcomes under extrusion, emphasizing kinetic and rheological factors.
Research Themes
- Oncoplastic breast reconstruction in upper inner quadrant
- Objective and patient-reported cosmetic outcomes (BCCT.core, BREAST-Q)
- Process-informed formulation: kinetic and rheological control in hot-melt extrusion
Selected Articles
1. Structure and Process Relationships in Extruded Polymer Systems: Solid-State Remodeling of Oxymetazoline.
This mechanistic study shows that thermodynamic miscibility (via HSP) is insufficient to predict the solid-state outcomes of oxymetazoline during hot-melt extrusion. Kinetic and mechanical factors, captured by melt rheology, govern energy transfer and drug–polymer interactions, enabling a process-informed framework for rational formulation under realistic conditions.
Impact: It challenges equilibrium-based preformulation by demonstrating that processing-driven kinetics and rheology dominate solid-state remodeling during extrusion. This provides a generalizable framework that can reduce development risk for thermally sensitive actives.
Clinical Implications: While preclinical, the framework can guide formulation of topical/dermatologic and consumer-health products (e.g., oxymetazoline) by prioritizing polymers and processing windows that stabilize drug structure, potentially improving shelf-life and performance.
Key Findings
- Thermodynamic predictions (HSP) alone did not predict post-extrusion solid-state outcomes.
- Systems with lower predicted compatibility underwent substantial structural transformations under extrusion, indicating kinetic/mechanical dominance.
- Melt rheology (viscoelasticity) modulated energy transfer and drug–polymer interactions during processing.
- A process-informed preformulation workflow integrating theory and experiments was established.
Methodological Strengths
- Integration of theoretical (HSP) ranking with thermal, solid-state, and rheological characterization
- Use of a thermally labile model drug to stress-test processing sensitivity
- Clear linkage between melt viscoelasticity and structural outcomes
Limitations
- Single model drug limits generalizability across chemotypes
- Lack of in vivo performance or long-term stability correlation
- Scale-up and process robustness were not evaluated
Future Directions: Validate across diverse drugs and polymers; develop predictive models linking rheology to solid-state transitions; couple with PAT and QbD to optimize extrusion windows and stability; correlate with product performance.
Hot-melt extrusion (HME) is widely used in the development of drug-polymer systems, yet conventional preformulation approaches remain largely based on equilibrium conditions and may fail to predict material behavior under processing. In this context, the present study proposes a process-informed preformulation strategy to investigate structure-process relationships in extrusion-based pharmaceutical systems. Oxymetazoline hydrochloride (OXY), a thermally sensitive compound exhibiting concurrent melting and degradation, was used as a challenging model drug. Polymer selection was initially guided by Hansen solubility parameters (HSP), followed by experimental evaluation of extruded systems through thermal, solid-state, and rheological characterization. The results showed that, although HSP provided a useful initial ranking of drug-polymer compatibility, the solid-state outcomes after extrusion were not solely governed by thermodynamic miscibility. In particular, systems with lower predicted compatibility exhibited significant structural transformations, indicating a dominant role of kinetic and mechanical factors associated with melt processing. Rheological analysis further demonstrated that melt viscoelasticity influenced energy transfer and the extent of drug-polymer interactions during extrusion. Overall, this study demonstrates that thermodynamic predictions alone are insufficient to anticipate solid-state behavior in extrusion-processed systems. The proposed approach provides a framework for integrating theoretical and experimental tools to support the rational design of pharmaceutical materials under realistic processing conditions.
2. Role of chest wall perforator flaps in reconstruction of upper inner breast defects.
In 20 women undergoing oncoplastic reconstruction of upper inner quadrant defects with chest wall perforator flaps, 95% achieved excellent/good cosmetic outcomes with 20% minor complications and no major flap loss. BREAST-Q scores at 12 months indicated favorable physical, psychological, and breast satisfaction domains.
Impact: Provides quadrant-specific evidence for chest wall perforator flaps in a cosmetically sensitive area using both objective software and validated PROMs.
Clinical Implications: Supports chest wall perforator flaps as a practical volume-replacement option for upper inner quadrant defects after breast-conserving surgery, with acceptable morbidity and strong cosmetic outcomes.
Key Findings
- 95% of patients achieved excellent/good cosmetic outcomes by BCCT.core assessment.
- Postoperative complications were 20% (seroma 10%, wound infection 5%, fat necrosis 5%) with no major flap loss.
- BREAST-Q at 12 months showed favorable physical well-being (73.4), psychological well-being (73.8), and breast satisfaction (70.1).
- Most common flap: AICAP (40%), followed by combined LICAP/LTAP (25%).
Methodological Strengths
- Use of BCCT.core for objective cosmetic assessment and BREAST-Q for validated PROMs
- Clearly defined complication capture with no major flap loss and negative margins
- IRB approval and standardized reporting of operative details
Limitations
- Small, single-center retrospective series without a control group
- Short follow-up limited to 12-month PROMs; long-term durability unknown
- Potential selection bias and limited generalizability
Future Directions: Prospective multicenter cohorts or randomized comparisons of CWPFs versus alternative oncoplastic strategies in UIQ, with longer-term aesthetic and oncologic outcomes and radiation effects.
BACKGROUND: Breast-conserving surgery (BCS) is the standard treatment for early-stage breast cancer; however, defects in the upper inner quadrant (UIQ) remain a significant reconstructive challenge due to paucity of local tissue and heightened cosmetic sensitivity of this quadrant. Chest wall perforator flaps (CWPFs) have emerged as a reliable volume replacement option with minimal donor-site morbidity, yet data focusing specifically on their use in UIQ defects are limited. METHODS: This retrospective study included 20 female patients with UIQ breast tumors who underwent partial breast reconstruction using CWPFs between January 2022 and December 2023. Data regarding patient and tumor characteristics, flap type, operative details, and postoperative complications were collected. Aesthetic outcomes were objectively assessed using BCCT.core software (version 3.1), while patient-reported outcome measures (PROMs) were evaluated at 12 months postoperatively using the BREAST-Q questionnaire. RESULTS: The mean patient age was 40.7 ± 5.0 years. The most commonly used flap was the anterior intercostal artery perforator (AICAP) flap (40%), followed by combined LICAP/LTAP flaps (25%). The mean operative time was 79.0 ± 7.5 min. Postoperative complications occurred in 20% of patients, including seroma (10%), wound infection (5%), and fat necrosis (5%), with no cases of major flap loss or positive surgical margins. According to BCCT assessment, excellent and good cosmetic outcomes were achieved in 95% of patients. PROMs demonstrated favorable outcomes, with mean scores of 73.4 ± 4.7 for physical well-being, 73.8 ± 4.2 for psychological well-being, and 70.1 ± 6.3 for satisfaction with the breast. CONCLUSION: CWPFs were used for reconstruction of UIQ defects following breast-conserving surgery with acceptable postoperative complication rates and favorable cosmetic assessment in this retrospective cohort. These findings describe the surgical and aesthetic outcomes observed in this challenging breast quadrant. Further prospective studies with larger patient populations are needed to better define the role of CWPFs in UIQ reconstruction. TRIAL REGISTRATION: Retrospectively registered after the approval of Baheya Ethical Committee, IRB no. 202,506,300,026.