Skin malignancies

  • 文章类型: Journal Article
    在21世纪,黑色素瘤和非黑色素瘤皮肤癌已成为世界范围内的流行病。因此,探索基于物理或生化机制的所有潜在的预防和治疗措施是必不可少的,通过了解精确的病理生理学途径(丝裂原激活的蛋白激酶,磷脂酰肌醇3-激酶通路,和Notch信号通路)以及此类皮肤恶性肿瘤的其他方面。纳米凝胶,一种直径为20-200nm的三维聚合物交联多孔水凝胶,具有水凝胶和纳米粒子的双重性质。具有更高热力学稳定性的高药物包封效率的能力,显著的溶解潜力,纳米凝胶的溶胀行为成为治疗皮肤癌的靶向给药系统的一个有希望的候选药物。纳米凝胶可以进行合成或结构修饰,以响应内部或外部刺激。包括辐射,超声,酶,磁性,pH值,温度,和氧化还原,以实现药物和几种生物活性分子如蛋白质的控制释放,肽,基因通过放大活性靶组织中的药物聚集和减少不良药理作用。几种药物,如具有短生物半衰期和快速酶降解能力的抗肿瘤生物分子,必须适用于采用化学桥接或物理构建的纳米凝胶框架的施用。全面综述了具有增强的药理潜力和保留的细胞内安全极限的靶向纳米凝胶的制备和表征方法的进展,以缓解皮肤恶性肿瘤,特别强调皮肤癌诱导的病理生理途径和皮肤恶性肿瘤靶向纳米凝胶的前瞻性研究机会。
    In the 21st century, melanoma and non-melanoma skin cancers have become an epidemic outbreak worldwide. Therefore, the exploration of all potential preventative and therapeutic measures based on either physical or bio-chemical mechanisms is essential via understanding precise pathophysiological pathways (Mitogen-activated protein kinase, Phosphatidylinositol 3-kinase Pathway, and Notch signaling pathway) and other aspects of such skin malignancies. Nano-gel, a three-dimensional polymeric cross-linked porous hydrogel having a diameter of 20-200 nm, possesses dual properties of both hydrogel and nanoparticle. The capacity of high drug entrapment efficiency with greater thermodynamic stability, remarkable solubilization potential, and swelling behavior of nano-gel becomes a promising candidate as a targeted drug delivery system in the treatment of skin cancer. Nano-gel can be either synthetically or architectonically modified for responding to either internal or external stimuli, including radiation, ultrasound, enzyme, magnetic, pH, temperature, and oxidation-reduction to achieve controlled release of pharmaceuticals and several bio-active molecules such as proteins, peptides, genes via amplifying drug aggregation in the active targeted tissue and reducing adverse pharmacological effects. Several drugs, such as anti-neoplastic biomolecules having short biological half-lives and prompt enzyme degradability capacity, must be appropriate for administration employing either chemically bridged or physically constructed nano-gel frameworks. The comprehensive review summarizes the advancement in the preparation and characterization methods of targeted nano-gel with enhanced pharmacological potential and preserved intracellular safety limits for the mitigation of skin malignancies with a special emphasize on skin cancer inducing pathophysiological pathways and prospective research opportunities for skin malignancy targeted nano-gels.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Case Reports
    外阴鳞状细胞癌(VSCC)是最常见的外阴瘤,具有侵袭性和转移性。通常,手术是首选治疗方法。放射疗法通常用于不可切除的局部晚期肿瘤和早期患者,这些患者有手术严重并发症的风险或患有严重的伴随疾病,从而阻止他们进行手术。与外照射相比,三维适形放射治疗(3D-CRT),和调强放射治疗(IMRT),在早期VSCC中单独使用体积调节电弧疗法(VMAT)的各种研究很少有报道.在这种情况下,患者有大面积皮肤损伤,无淋巴结转移。手术切除会严重影响排尿功能和外阴形状,所以进行了根治性放疗。为了保证根治性治疗效果的辐射剂量,避免高剂量辐射到正常器官,选择容积调强放疗技术.治疗后,病人的外阴外观恢复正常,肿瘤完全缓解,无需进一步手术或化疗,没有局部复发或相关的毒副作用。提示单纯VMAT治疗早期VSCC疗效准确,值得临床推广。该患者从事铜冶炼和净化工作多年,对她来说,皮肤损伤如此大的表面积是不寻常的。结合她以前的鼻基底细胞癌病史,金属暴露过程中的氧化应激机制应进一步进行临床检查,因为它可能在恶性肿瘤的形成和进展中至关重要。
    Vulvar squamous cell carcinoma (VSCC) is the most frequent vulvar neoplasia, with invasiveness and metastasis. Typically, surgery is the preferred treatment. Radiotherapy is commonly used for unresectable locally advanced tumors and for early-stage patients who are at risk of serious complications from surgery or have a severe concomitant disease that prevents them from undergoing surgery. Compared to external irradiation, three-dimensional conformal radiotherapy (3D-CRT), and intensity-modulated radiotherapy (IMRT), various studies using volumetric modulated arc therapy (VMAT) alone in early-stage VSCC have been reported rarely. In this case, the patient had a large skin lesion and no lymph node metastasis. Surgical excision would seriously affect the urinary function and vulvar shape, so radical radiotherapy was given. To ensure the radiation dose for the radical treatment effect and to avoid high-dose radiation to normal organs, the volumetric intensity-modulated radiotherapy technique was chosen. After treatment, the patient\'s vulvar appearance returned to normal, and the tumor achieved complete remission without further surgery or chemotherapy, with no local recurrence or associated toxic side effects. This suggests that the efficacy of VMAT alone in early-stage VSCC is accurate and worthy of clinical promotion. The patient had been engaged in copper smelting and purification for many years, and it is unusual for her to have skin lesions with such a large surface area. In conjunction with her previous history of nasal basal cell carcinoma, the mechanism of oxidative stress during metal exposure should be further clinically examined, as it may be crucial in the formation and progression of malignancies.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    Melanoma constitutes one of the most sinister and troublesome malignancies encountered by humanity. Generally, the diagnosis of advanced melanoma connotes a grave prognosis, prompting a sense of looming threat of death, however, the early-stage detected disease responds well to robust treatment resulting in reasonable survivorship. Scalp melanomas are even more troublesome, because they typically exhibit more aggressive biologic behavior and are often diagnosed at a late stage. This review tries to comprehensively highlight the various diagnostic, therapeutic, and outcome aspects of scalp melanomas. The literature research includes peer-reviewed articles (clinical trials or scientific reviews). Studies were identified by searching electronic databases (MEDLINE and PubMed) till May 2020 and reference lists of respective articles. Only articles published in English language were included.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

  • 文章类型: Letter
    暂无摘要。
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

       PDF(Pubmed)

公众号