Publications by authors named "Luana Sousa"

Studying the tumor microenvironment and surrounding lymph nodes is the main focus of current immunological research on soft tissue sarcomas (STS). However, due to the restricted opportunity to examine tumor samples, alternative approaches are required to evaluate immune responses in non-surgical patients. Therefore, the purpose of this study was to evaluate the peripheral immune profile of STS patients, characterize patients accordingly and explore the impact of peripheral immunotypes on patient survival.

View Article and Find Full Text PDF

Objective: Periocular squamous cell carcinoma (SCC) is relatively rare and presents unique anatomic considerations due to proximity to the eye and risk to ocular structures associated with high-dose radiation therapy or radical surgery. We present our observations in patients with periocular SCC treated with immune checkpoint inhibitor (ICI) therapy in an effort to decrease surgical morbidity or avoid high-dose radiation therapy.

Methods: Retrospective review of patients with orbital, conjunctival, or periocular SCC who were treated with ICI either in the neoadjuvant setting prior to surgery or for treatment of perineural spread in the orbit/skull base.

View Article and Find Full Text PDF
Article Synopsis
  • BRAF/MEK inhibitors have significantly improved outcomes for patients with BRAF V600E-variant anaplastic thyroid carcinoma (BRAFv-ATC), which was previously considered untreatable.
  • Given that anaplastic thyroid carcinoma is a highly aggressive cancer linked to high mortality, quick diagnosis and treatment are crucial for better patient survival.
  • The FAST Consensus Statement stresses the need for early detection of the BRAF V600E variant and suggests streamlined treatment approaches to enhance patient care, addressing the recent advancements that still need to be reflected in clinical guidelines.
View Article and Find Full Text PDF

First use of AXL-targeting in adenoid cystic carcinoma (ACC); with positive results, ACC now included in AXL studies.

View Article and Find Full Text PDF

Objectives: Lung metastases in adenoid cystic carcinoma (ACC) usually have indolent growth and the optimal timing to start systemic therapy is not established. We assessed ACC lung metastasis tumor growth dynamics and compared the prognostic value of time to progression (TTP) and tumor volume doubling time (TVDT).

Methods: The study included ACC patients with ≥1 pulmonary metastasis (≥5 mm) and at least 2 chest computed tomography scans.

View Article and Find Full Text PDF

Background/aims: We describe our findings in patients with locally advanced lacrimal sac and nasolacrimal duct (NLD) carcinoma who received neoadjuvant systemic therapy.

Methods: We identified patients with locally advanced primary lacrimal sac/NLD carcinoma treated with neoadjuvant systemic intravenous therapy at our institution during 2017-2019.

Results: The study included seven patients, four men and three women; the mean age was 60.

View Article and Find Full Text PDF

Small cell lung cancer (SCLC) is an aggressive malignancy composed of distinct transcriptional subtypes, but implementing subtyping in the clinic has remained challenging, particularly due to limited tissue availability. Given the known epigenetic regulation of critical SCLC transcriptional programs, we hypothesized that subtype-specific patterns of DNA methylation could be detected in tumor or blood from SCLC patients. Using genomic-wide reduced-representation bisulfite sequencing (RRBS) in two cohorts totaling 179 SCLC patients and using machine learning approaches, we report a highly accurate DNA methylation-based classifier (SCLC-DMC) that can distinguish SCLC subtypes.

View Article and Find Full Text PDF

The aim of this study was to analyze the healing action of low-intensity laser therapy associated with Himatanthus drasticus in wound healing in mice. The study was experimental, analytical, controlled, randomized, and prospective. Twenty Wistar rats were divided into four groups: control with injury, injury + laser, wound + Himatanthus drasticus, and wound + laser + Himatanthus drasticus.

View Article and Find Full Text PDF

Objective: To evaluate and synthesise the factors determining patient safety culture in hospitals.

Methods: The scoping review protocol was based on the criteria of the Joanna Briggs Institute. Eligibility criteria were as follows: (1) empirical study published in a peer-reviewed journal; (2) used methods or tools to assess, study or measure safety culture or climate; (3) data collected in the hospital setting and (4) studies published in English.

View Article and Find Full Text PDF
Article Synopsis
  • - The study investigates the tumor microenvironment (TME) of adenoid cystic carcinoma (ACC), a type of cancer with no effective systemic treatment for its metastatic form, distinguishing between two molecular subtypes: ACC-I and ACC-II, with varying prognoses and therapeutic vulnerabilities.
  • - Using RNA-sequencing and advanced imaging techniques, researchers found that most ACC tumors are immunologically "cold" and that ACC-I tumors, associated with poor prognosis, have more immune cells but are confined to the stroma, indicating an immune-excluded TME.
  • - The research highlights the overexpression of the immune checkpoint B7-H4 in ACC-I tumors, which correlates with worse survival outcomes, suggesting that targeting B7-H4 could
View Article and Find Full Text PDF

Introduction: Cutaneous squamous cell carcinoma (CSCC) is the second most common form of human cancer. Treatment of locally advanced and/or recurrent CSCC is often challenging. A subset of patients are not candidates for curative-intent therapies due to extent of loco-regional disease, refractoriness to prior local therapy, or presence of distant metastasis.

View Article and Find Full Text PDF
Article Synopsis
  • A phase II trial was conducted to evaluate the effectiveness of the combination therapy of axitinib (a VEGFR inhibitor) and avelumab (a PD-L1 inhibitor) in patients with recurrent or metastatic adenoid cystic carcinoma (R/M ACC).
  • The trial included 40 participants, with 28 being evaluable for efficacy; the objective response rate (ORR) was confirmed at 18%, and median progression-free survival (PFS) was 7.3 months, with median overall survival (OS) at 16.6 months.
  • Common treatment-related side effects were fatigue, hypertension, and diarrhea, with a need for dose reductions and treatment discontinuation; further research is needed to assess the benefits of
View Article and Find Full Text PDF

Background: The prognostic impact of human papillomavirus (HPV) infection or smoking on oropharyngeal high-grade neuroendocrine carcinoma (HG-NEC) is not established.

Methods: Retrospective study with patients with oropharyngeal HG-NEC seen at MD Anderson Cancer Center from 1997 to 2020, and previously reported patients with oropharyngeal HG-NEC and known p16 and HPV status from the literature review. Survival was estimated with the Kaplan-Meier method, and survival differences assessed with the log-rank test and Cox proportional hazards models.

View Article and Find Full Text PDF

The aim of this study was to evaluate the prevalence and diversity of endoparasitic fauna and the risk factors associated with parasite infections in free-range chickens in the state of Paraíba, northeastern Brazil. Ten municipalities were visited and, in each of them, ten farms, to collect animal feces and apply epidemiological questionnaires. Feces from 417 poultry were used to perform EPG (eggs per gram) and OoPG (oocysts per gram) tests.

View Article and Find Full Text PDF

Adenoid cystic carcinoma (ACC) is a heterogeneous cancer that commonly develops in the salivary glands. Approximately 40 to 50% of patients with ACC develop recurrence and/or metastasis. Although most patients with ACC have slow-growing disease, a subset experiences aggressive disease with early visceral and/or bone metastasis.

View Article and Find Full Text PDF

The aim of the present study was to find out the diversity of Eimeria species in cattle herds in the semiarid region of Brazil. Forty cattle fecal samples were collected from 20 farms in the Paraíba State, Northeast Brazil, and examined by centrifugation-floatation technique in sucrose solution. From each positive animal, 20 oocysts were photographed and measured.

View Article and Find Full Text PDF

Rhipicephalus microplus, also known as the cattle tick, is the parasite with the greatest impact on cattle in Brazil. The most common method for controlling this tick is the application of synthetic chemical acaricides, especially ivermectin, which belongs to the group of macrocyclic lactones (MLs). However, because ivermectin is widely used, there is concern about the development of cross-resistance within this chemical class.

View Article and Find Full Text PDF

We aimed to evaluate a Brazilian commercial formulation of the fungus Duddingtonia flagrans (Bioverm®) for controlling gastrointestinal nematodes in sheep kept on native pasture in the Caatinga biome, in the semiarid region of Brazil. Twenty ewes, aged between 12 and 18 months, were divided into two groups. In the treated group, each animal received 1 g of the Bioverm® product for each 10 kg of live weight, daily, together with commercial feed, for 6 months.

View Article and Find Full Text PDF
Article Synopsis
  • Vaccination against COVID-19 is especially important for immuno-compromised patients, such as those with cancer, as it can provoke a strong immune response.
  • A patient with metastatic salivary gland myoepithelial carcinoma experienced significant tumor regression after experiencing severe side effects from the mRNA-1273 COVID-19 vaccine, indicating a potential link between vaccination and anticancer immunity.
  • Post-vaccination analyses showed a substantial increase in immune cell infiltration in lung metastasis samples, which correlated with the observed reduction in tumor size over time.
View Article and Find Full Text PDF

Purpose Of Review: Adenoid cystic carcinoma (ACC) is a rare and heterogeneous malignancy of secretory glands. Recurrence after curative-intent treatment is common, and approximately 40% of patients develop metastatic disease, for which consensus is lacking regarding therapeutic approaches. Here, we review the available therapies for recurrent/metastatic (R/M) ACC and offer our perspectives on future treatment options.

View Article and Find Full Text PDF

Background: The combination of ISA101, a human papilloma virus (HPV) 16 peptide vaccine, and nivolumab showed a promising response rate of 33% in patients with incurable HPV-16 cancer. Here we report long-term clinical outcomes and immune correlates of response.

Methods: Patients with advanced HPV-16 cancer and less than two prior regimens for recurrence were enrolled to receive ISA101 (100 µg/peptide) on days 1, 22, and 50 and nivolumab 3 mg/kg every 2 weeks beginning day 8 for up to 1 year.

View Article and Find Full Text PDF

The thin line between efficacy and toxicity has challenged cancer therapy. As copper is an essential micronutrient and is important to tumor biology, Cu complexes emerged as an alternative to chemotherapy; however, its biological properties need to be better understood. Thus, we report in vitro the antitumor effects of two Cu complexes named [Cu(4-fh)(phen)(ClO)] (complex 1) and [Cu(4-nh)(phen)(ClO)]·HO (complex 2), in which 4-fh = 4-fluorophenoxyacetic acid hydrazide; 4-nh = 4-nitrobenzoic hydrazide and phen = 1,10-phenanthroline.

View Article and Find Full Text PDF

Osteosarcoma (OST) is the most common type of high-grade primary bone tumor, which mainly affects young adults. The current standard of care for OST combines surgical resection with chemotherapy. The clinical outcomes and the current options to treat OST patients are unsatisfactory and novel treatment strategies are needed.

View Article and Find Full Text PDF

Targeted therapy and immune checkpoint inhibitors (ICI) have drastically improved outcomes of metastatic non-small cell lung cancer (NSCLC) patients in outpatient settings. Because trials on critically ill patients are improbable, little is known about their efficacy among patients admitted to intensive care units (ICU). We retrospectively analyzed the clinical outcomes of critically-ill NSCLC patients receiving either ICI or targeted therapy during ICU admission at the MD Anderson Cancer Center from April 2016 to August 2020.

View Article and Find Full Text PDF