Unveiling the power of polymeric nanoparticles: Pioneering advances in breast cancer treatment

Breast cancer has become the most common type of cancer worldwide. Chemotherapy is a prevalent and efficacious treatment for breast cancer; yet, it presents several problems that might impact both the treatment's effectiveness and the patient's quality of life. Certain breast cancer cells exhibit inherent resistance to chemotherapeutic agents from the outset. Cancer cells may evolve throughout therapy, developing resistance to previously successful medications. This encompasses augmented drug efflux (e.g., via P-glycoprotein), enhanced DNA repair mechanisms, and modifications in drug targets. Moreover, conventional chemotherapy is impeded by several limitations, including poor drug solubility, reduced blood circulation time, harm to healthy tissues, drug resistance, and tumor recurrence. Consequently, it is essential to provide significant doses of chemotherapeutics to guarantee that a sufficient amount reaches the tumor and has the desired effect. Unfortunately, the administration of excessive pharmacological doses damages healthy tissue, resulting in various side effects including nausea, baldness, fatigue, immune system breakdown, sterility, and organ dysfunction. In this context, polymeric nanoparticles, including liposomes, nanocomposites, polymeric micelles, and dendrimers, have several benefits relative to conventional therapy. This encompasses greater circulation duration, superior targeting characteristics, compatibility with biological systems, natural degradability, and higher retention of drug-loaded nanoparticles inside tumors, leading to diminished side effects in other bodily regions. This work offers innovative perspectives on the use of polymeric nanoparticles as an advanced nano-drug delivery technology for chemotherapeutics, particularly in breast cancer therapy. It also analyses several kinds of copolymers used in the synthesis of polymeric micelles. This study examines the physicochemical features of these nanoparticles, their synthesis methods, characterization techniques, pharmacokinetic behavior, and their applicability in breast cancer diagnostics.