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1.
Cureus ; 15(4): e37798, 2023 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-37213952

RESUMEN

Tooth wear is a multifactorial process of complex aetiology. It may be considered a physiological or pathological process depending upon the rate and degree of occurrence. The patients may present with symptoms of sensitivity, pain, headaches or recurrent loss of restorations and prostheses, leading to loss of function. This case report describes the rehabilitation of a 65-year-old male patient with intrinsic dental erosion combined with generalised attrition. The restorative treatment aimed at restoring anterior guidance, establishing a stable occlusion for the patient with minimal intervention.

2.
Eur J Biol ; 82(2): 317-325, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-38264081

RESUMEN

Reactive oxygen species (ROS) are a class of bioactive molecules that are the by-products of many cellular functions. These molecules are present in normal cells at homeostatic levels but have been studied extensively in cancer due to their dysregulation resulting in pro- and anti-tumorigenic environments. Completely understanding the paradoxical nature of ROS in cancer is imperative to fully realize its modulation as cancer therapy. Studies into ROS have shown far-reaching effects in cancer, including how ROS levels regulate signaling, response to treatment, drug resistance, etc. Many drugs were studied with the hopes of regulating the ROS levels in cancer; however, patient response varied. Plant-derived medications offered new avenues of drug treatment over the last few decades, and the phytochemical Curcumin gained ground as an interesting cancer therapeutic. Curcumin is an active phenolic compound used in traditional medicine around the world. Although it suffers from a poor pharmacokinetic profile, Curcumin exerts anti-tumorigenic, as well as ROS-modulating activities. Analogs and derivatives of Curcumin are under development to improve upon its anti-cancer properties and enhance its bioavailability, currently a major limitation of its usage. This review highlights ROS function in cancer treatment focused on ROS, including Curcumin and its analogs.

3.
Eur J Biol ; 82(2): 280-288, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-38264080

RESUMEN

Objective: NAD(P)H: Quinone oxidoreductase1 (NQO1) plays a crucial role in cellular defense against oxidative stress. Overexpression of NQO1 is linked to various cancer pathways. Despite its potential, the actual mechanisms to inhibit NQO1 and increase the efficacy of standard therapeutic options are not yet established. Resveratrol is an anti-cancer polyphenol found in dietary products and red wine. The objective of this investigation is to employ in silico methods to explore how resveratrol interacts with NQO1. Materials and Methods: Docking analysis of resveratrol against NQO1 was performed using Glide. The most efficiently docked complex was characterized and analyzed by measuring intermolecular (IM) hydrogen (H)-bonds and binding energy values, additional hydrophobic, and electrostatic interactions. IM interaction between complexed protein and compound was demonstrated using LigPlot+ and the Schrödinger ligand interaction module. Molecular dynamics tools were employed to examine the physical movement of molecules to evaluate how macromolecular structures relate to their functions. Results: The results of this investigation depicted a strong affinity of resveratrol against NQO1 followed by MD simulations (NQO1-resveratrol complex-binding energy: -2.847kcal/mol). Resveratrol's robust binding affinity through docking and molecular dynamic simulations highlights a significant change around 90 ns. The H-bonds number was inversely linked with the resveratrol-NQO1 complex stability. The NQO1-Resveratrol complex displayed dynamic motion, as revealed by porcupine projections, indicating alterations in its movement and flexibility. Conclusion: The present in silico analysis suggests a possible alteration in resveratrol's orientation in the protein binding pocket. The findings encourage further investigation, including validation using in vitro and in vivo assays.

4.
Pharmaceuticals (Basel) ; 17(1)2023 Dec 28.
Artículo en Inglés | MEDLINE | ID: mdl-38256885

RESUMEN

A hallmark of effective cancer treatment is the prevention of tumor reoccurrence and metastasis to distal organs, which are responsible for most cancer deaths. However, primary tumor resection is expected to be curative as most solid tumors have been shown both experimentally and clinically to accelerate metastasis to distal organs including the lungs. In this study, we evaluated the efficacy of our engineered nasal nano-vaccine (CpG-NP-Tag) in reducing accelerated lung metastasis resulting from primary tumor resection. Cytosine-phosphate-guanine oligonucleotide [CpG ODN]-conjugated nanoparticle [NP] encapsulating tumor antigen [Tag] (CpG-NP-Tag) was manufactured and tested in vivo using a syngeneic mouse mammary tumor model following intranasal delivery. We found that our nasal nano-vaccine (CpG-NP-Tag), compared to control NPs administered after primary mammary tumor resection, significantly reduced lung metastasis in female BALB/c mice subjected to surgery (surgery mice). An evaluation of vaccine efficacy in both surgery and non-surgery mice revealed that primary tumor resection reduces CD11b+ monocyte-derived suppressor-like cell accumulation in the lungs, allowing increased infiltration of vaccine-elicited T cells (IFN-γ CD8+ T cells) in the lungs of surgery mice compared to non-surgery mice. These findings suggest that the combination of the target delivery of a nasal vaccine in conjunction with the standard surgery of primary tumors is a plausible adjunctive treatment against the establishment of lung metastasis.

5.
Gene ; 841: 146774, 2022 Oct 20.
Artículo en Inglés | MEDLINE | ID: mdl-35905853

RESUMEN

BACKGROUND: The COVID-19 is caused by a novel coronavirus SARS-CoV-2, which started from China. It spread rapidly throughout the world and was later declared a pandemic by the WHO. Over the course of time, SARS-CoV-2 has mutated for survival advantages, and this led to multiple variants. Multiple studies on mutations identification in SARS-CoV2 have been published covering extensive sample areas. The purpose of this study was to limit the sample area to the Georgia state in the U.S. and to analyze the genome sequences for mutation profiling across the genome and origin of variants. METHODS: The genome sequences (n = 3,970) were obtained from the NCBI database as of June 12, 2021, with the filter of being complete sequenced genomes, homo-sapiens host, and only from Georgia State of the U.S. NextClade, an online tool was used for the analysis of the sequences using Wuhan-Hu-1/2019 as a reference genome. The algorithm was sequence alignment, translation, mutation calling, phylogenetic placement, clade assignment, and quality control (QC). Thirty-six samples with bad QC were removed from the mutational analysis. RESULTS: A total 117,743 mutations in the nucleotides were identified (averaging 31.5 mutations per sample). The mutations A23403G, C3037T, C241T, and C14408T were detected in 98% of the samples. Also, a total of 75,517 mutations in the amino acid were identified (averaging 20.2 mutations per sample). The mutations D614G and P314L were identified in >97% samples whereas R203K, G204R, P681H, and N501Y were detected in >50% samples. Analysis also revealed 16 different clades with 20I (49.6%). Clades 20G (24.2%) and 20A (5.5%) being the most abundant, showed that SARS-CoV-2 in the Georgia State originated mainly from Southeast England, other parts of the U.S., and several countries in Western Europe. CONCLUSION: Looking at the three most common variants in Georgia State of the U.S., we could determine the primary locations of transmission or origin for the virus, and our analyses indicates that majority of the cases originated from Southeast England (Clade 20I), the U.S. itself (Clade 20G), and from Western Europe (Clade 20C).


Asunto(s)
COVID-19 , SARS-CoV-2 , COVID-19/epidemiología , COVID-19/genética , Genoma Viral , Georgia/epidemiología , Humanos , Mutación , Filogenia , ARN Viral/genética , SARS-CoV-2/genética , Estados Unidos/epidemiología
6.
J Osteopath Med ; 122(6): 289-295, 2022 03 02.
Artículo en Inglés | MEDLINE | ID: mdl-35245010

RESUMEN

CONTEXT: It is important for colleges of osteopathic medicine (COMs) to provide opportunities for osteopathic medical students (OMSs) to conduct research under the guidance of professional researchers. However, COMs historically lag behind allopathic medical schools in research offerings for medical students. The literature would benefit from a synopsis of research opportunities for OMSs at COMs. OBJECTIVES: This study aims to assess the availability of research opportunities currently offered to OMSs and to identify structured research programs (SRPs) to provide data that may help COMs expand such opportunities. METHODS: Two online surveys were developed. The General Survey asked about general research opportunities, research requirements, and SRPs, which we define as optional, intramural, and mentored research programs. The follow-up SRP Survey sought to understand the history, funding, and organizational structure of SRPs. Between February and June 2021, the General and SRP Surveys were sent to all COMs in the United States. Response data were analyzed descriptively. RESULTS: Responses were received from 32 (84.2%) of 38 COMs. Nearly all COMs offered research symposia, offered third- or fourth-year research elective rotations, and provided some form of funding for OMSs to participate in research. Fourteen (43.8%) COMs had mandatory research requirements. Twenty COMs (62.5%) offered 31 SRPs, and surveys were completed for 25 (80.6%) SRPs. SRPs were founded a median (range) of 7 (1-43) years prior and accommodated 20 (4-50) OMSs annually. Among the responding SRPs, 12.0% had external funding, 96.0% required applications, 50.0% interviewed applicants prior to acceptance into the program, 72.0% required OMSs to identify their own mentors, 68.0% offered stipends to OMSs, 28.0% offered course credits, 96.0% had clinical research opportunities, and 68.0% offered research-oriented didactics. In 84.0% of SRPs, OMSs worked predominantly in the summer after OMS-I; for these SRPs, students had 4-10 weeks of dedicated time for participation in research. CONCLUSIONS: Findings from our surveys provide a synopsis of the research opportunities currently provided by COMs in the United States. Our data demonstrated wide variability of research opportunities among COMs.


Asunto(s)
Investigación Biomédica , Medicina Osteopática , Estudiantes de Medicina , Humanos , Medicina Osteopática/educación , Facultades de Medicina , Encuestas y Cuestionarios , Estados Unidos
7.
Semin Cancer Biol ; 86(Pt 3): 616-621, 2022 11.
Artículo en Inglés | MEDLINE | ID: mdl-34774995

RESUMEN

Pancreatic cancer (PC) is a major gastrointestinal cancer in terms of worldwide incidence and mortality. Despite advances in diagnostic and treatment modalities, the mortality of PC is still a serious concern in both sexes. Immune therapy using inhibitors of immune checkpoints, especially inhibitors of programmed cell death protein 1/programmed cell death ligand-1(PD-1/PD-L1), offer huge benefits to cancer patients. This review describes an up-to-date information on the role of PD-1 and PD-L1 in the development of immune tolerance in PC alongside the current clinical trials and the known outcomes citing the available literature. We also included the details on PD-1/PD-L1-mediated signalling in maintenance of PC stem cells and metastasis. We reviewed the critical information on safety, tolerance, and efficacy of clinically important regimens of PD-1/PD-L1 blocking agents and targeted therapeutics. This review elucidates the underlying mechanisms of PD-1/PD-L1 alliance in tolerance of the immune system, maintenance of stem cells, and metastasis promotion as well as design regimens with high safety and excellent tolerability and efficacy for management of PC in advanced stages.


Asunto(s)
Antígeno B7-H1 , Neoplasias Pancreáticas , Humanos , Receptor de Muerte Celular Programada 1 , Inmunoterapia , Neoplasias Pancreáticas/terapia , Factores Inmunológicos , Neoplasias Pancreáticas
8.
Onco Ther ; 9(2): 43-55, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-37309487

RESUMEN

A class of plant polysaccharides, pectin is known to display several medicinal properties including in cancer. There is some evidence that pectin from some fruits can reduce the severity of colorectal cancer (CRC) due to its antiproliferative, anti-inflammatory, antimetastatic and pro-apoptotic properties. Pectin fermentation in the colon induces antiproliferative activity via butyrate. Research also showed that pectin acts as a potent inducer of programmed cell death and cell-cycle arrest, thereby selectively targeting cancer cells. Pectin can limit oxidative stress to maintain cellular homeostasis while increasing reactive oxygen species damage to activate cancer cell death. Pectin regulates various signaling cascades, e.g., signal transduction and transcriptional activator and mitogen-activated protein kinase signaling, that contribute to its anticancer activity. By curbing inflammation-activated signaling and bolstering immune-protective mechanisms pectin can eradicate CRC. Due to its chemical structure, pectin can also inhibit galectin-3 and suppress tumor growth and metastasis. Prior reports also suggested that pectin is beneficial to use alongside the CRC standard care. Pectin can increase sensitivity to conventional CRC drugs, alleviate unwanted side effects and reduce drug resistance. Although some preclinical studies are promising, early clinical trials are showing some evidence for pectin's efficacy in tumor growth inhibition and preventing metastasis in some cancers; however, the clinical use of pectin in CRC therapy is not yet well established. Further studies are needed to confirm the efficacy of pectin treatment as a valid clinical therapy for CRC in humans.

9.
Onco Ther ; 9(1): 51-62, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-37324055

RESUMEN

Curcumin (CUR), a natural phenolic compound, has been increasingly investigated in several malignancies due to its safe profile and ability to affect a wide range of oncogenic targets. With the ability to affect metastasis, apoptosis, and angiogenesis in colorectal cancer (CRC) and its tolerability at high doses, CUR is an attractive target for study. However, poor bioavailability and unfavorable pharmacokinetics and pharmacodynamics have hampered CUR's efficacy in clinical trials. Development of its derivatives and alternative delivery methods have shown the potential to overcome its inherent bioavailability issues. Recent analyses of various derivatives and nanoparticle encapsulation of CUR have demonstrated increased effectiveness in CRC studies. A major advantage of CUR has been its synergistic effects when used in combination with various chemotherapeutic agents. CUR offers a unique treatment option in terms of patient safety and its ability to be used in combination with current treatments for CRC. Further development of its derivatives and alternative delivery options offer potential new avenues of treatment that could outperform previous efforts to establish CUR as a CRC therapy.

10.
J Pediatr Endocrinol Metab ; 34(6): 707-711, 2021 Jun 25.
Artículo en Inglés | MEDLINE | ID: mdl-33819416

RESUMEN

OBJECTIVES: Given their established role in hepatic function and insulin resistance for adults, early screening of type 2 diabetes mellitus (T2DM) in the pediatric population may potentially be improved by the assessment of elevated liver enzymes. METHODS: Our study enrolled 151 nondiabetic children aged 10-14 years. Patients were assessed for demographics and five risk factors for T2DM. The levels of γ-glutamyl transpeptidase (GGT), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) levels were determined in serum samples. The effects of demographics and risk factors on abnormal liver enzyme levels were assessed with univariate chi-square analyses and also with multivariate logistic regression analyses, which were controlled for gender. RESULTS: Frequencies for abnormal liver enzyme values were as follows: 13 (9%) for GGT, 5 (3%) for ALT, and 20 (13%) for ALP. Across analyses, two results were consistently statistically significant. Females were more likely to have abnormal ALP levels, and patients with BMI percentile ≥95% and with acanthosis nigricans were more likely to have abnormal GGT levels. CONCLUSIONS: Our study suggests GGT as potential marker for T2DM discovery in children. Subsequent long-term longitudinal studies would help to more clearly delineate GGT's association with T2DM. Additionally, future studies that elucidate the molecular contribution of GGT elevation to T2DM pathogenesis are needed.


Asunto(s)
Alanina Transaminasa/sangre , Fosfatasa Alcalina/sangre , Biomarcadores/sangre , Diabetes Mellitus Tipo 2/epidemiología , gamma-Glutamiltransferasa/sangre , Adolescente , Índice de Masa Corporal , Estudios de Casos y Controles , Niño , Diabetes Mellitus Tipo 2/sangre , Diabetes Mellitus Tipo 2/enzimología , Diabetes Mellitus Tipo 2/patología , Femenino , Estudios de Seguimiento , Humanos , Masculino , Prevalencia , Pronóstico , Factores de Riesgo , Texas/epidemiología
11.
J Osteopath Med ; 121(4): 385-390, 2021 02 23.
Artículo en Inglés | MEDLINE | ID: mdl-33694344

RESUMEN

CONTEXT: Medical students, especially at osteopathic medical schools, have limited research exposure. Systematic instruction in research, supervised by qualified mentors, could motivate osteopathic medical students to pursue research in their careers, thereby increasing the number of future clinician-scientists. Recruiting and retaining suitable research mentors are crucial to sustaining such programs, but this task is also particularly challenging for osteopathic medical schools. OBJECTIVES: To assess mentors' experiences in a voluntary student-mentor medical research program. METHODS: An online survey was sent to 76 university- or hospital-based participants who previously mentored 219 medical students between 2014 and 2019. The questionnaire consisted of 13 items with responses in checklist, five-point Likert scale, and categorical multiple-choice formats, assessing motivation for participation, satisfaction with the program, and interest in future participation. Data were analyzed descriptively, and responses from mentors at the university and hospital were compared using univariate logistic and ordinal regression analyses. RESULTS: Among 70 (92.1%) mentors who responded to the survey, 61 (87.1%) reported being motivated by a desire to help medical students learn research. Forty-nine (70.0%) mentors indicated that furthering their own research productivity was a motivation, and hospital-based mentors were statistically significantly more likely to endorse this source of motivation (OR=2.02; 95% CI=1.18-3.45; p=0.01). Most respondents were satisfied with the quality of the students' work (59 [84.3%]) and with the program (59 [85.5%]). However, 46 (65.7%) suggested the program could be enhanced by requiring medical students to be physically present in the clinic or laboratory for a minimum amount of time. Importantly, most (58 [84.1%]) mentors reported that they would be interested in participating in future mentored research programs. CONCLUSIONS: Mentors were motivated to participate in the voluntary research program for both altruistic and professional reasons. Since most mentors reported being satisfied with the program, it is likely they would participate in future mentored research programs. Our results suggest that mentors viewed this voluntary research program as mutually beneficial.


Asunto(s)
Mentores , Estudiantes de Medicina , Humanos , Aprendizaje
12.
Front Genet ; 11: 903, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32973872

RESUMEN

Social epigenomics has emerged as an integrative field of research focused on identification of socio-environmental factors, their influence on human biology through epigenomic modifications, and how they contribute to current health disparities. Several health disparities studies have been published using genetic-based approaches; however, increasing accessibility and affordability of molecular technologies have allowed for an in-depth investigation of the influence of external factors on epigenetic modifications (e.g., DNA methylation, micro-RNA expression). Currently, research is focused on epigenetic changes in response to environment, as well as targeted epigenetic therapies and environmental/social strategies for potentially minimizing certain health disparities. Here, we will review recent findings in this field pertaining to conditions and diseases over life span encompassing prenatal to adult stages.

13.
Crit Rev Oncog ; 25(1): 31-46, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32865909

RESUMEN

Liver cancer is a particularly aggressive group of malignancies with historically low survival rates. Despite advancements in cancer treatments in general in the last few decades, incidence and mortality have not changed. Even though some phase 1 and 2 studies have shown promising results, many medication have failed to reach a sustainable level of efficacy to move into the clinical setting. Immunotherapy drugs have shown impressive results in the treatment of specific immunogenic cancers, prompting the possibility of their use in liver cancers. Immunotherapy medications approved for other cancers have received FDA accelerated approval for treatment of hepatocellular carcinoma. But, these approvals are contingent upon verification and description of clinical benefit in confirmatory trials. With more treatments in development involving cancer vaccines and natural killer cell-mediated therapy, liver cancer treatment is being reinvigorated with a broad array of new treatment angles. In this review article, we discuss these treatments, focusing on mechanism of action and clinical trials. Much needed advancements in treating late- and early-stage liver cancers will require new and innovative immunotherapeutic treatments.


Asunto(s)
Inmunoterapia/métodos , Neoplasias Hepáticas/terapia , Vacunas contra el Cáncer/uso terapéutico , Ensayos Clínicos como Asunto , Humanos , Inhibidores de Puntos de Control Inmunológico/uso terapéutico , Células Asesinas Naturales/inmunología , Neoplasias Hepáticas/diagnóstico , Viroterapia Oncolítica
14.
Crit Rev Oncog ; 25(1): 47-55, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32865910

RESUMEN

Liver cancer is the 6th leading cause of cancer related deaths in the US even though it ranks 14th in incidence. More men are diagnosed with liver cancer than women, and the number of projected deaths among men (20,020) is almost double that among women (10,140) in the US. Infections like hepatitis and metabolic conditions like obesity are believed to be major risk factors for the onset of liver cancer. Hepatocellular carcinoma (HCC), the most common type of liver cancer, accounts for 75% of all cases. Chemotherapy has not been effective in treating HCC. Targeted therapies are being used in advanced HCC patients due to a better survival and less side effects when compared to traditional chemotherapy. Therapeutic agents targeting the regulators of growth factor signaling pathways and the mediators of downstream signaling-for example, inhibitors of the tyrosine kinase receptor-are used as targeted molecular therapies. Kinase inhibitors that modulate growth signals, such as sorafenib and lenvatinib, are commonly employed in targeted molecular therapy for HCC patients. This review covers these agents, highlighting modes of action and providing details on clinical trials.


Asunto(s)
Carcinoma Hepatocelular/tratamiento farmacológico , Neoplasias Hepáticas/tratamiento farmacológico , Terapia Molecular Dirigida/métodos , Ensayos Clínicos como Asunto , Humanos , Compuestos de Fenilurea/uso terapéutico , Quinolinas/uso terapéutico , Transducción de Señal , Sorafenib/uso terapéutico
15.
Process Biochem ; 89: 155-164, 2020 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-32719579

RESUMEN

Anti-cancer activity of tolfenamic acid (TA) in preclinical models for pancreatic cancer (PaCa) is well established. Since the dosage for anti-cancer actions of TA is rather high, we recently demonstrated that IC50 values of Copper-TA are 30-80% less than TA in 12 cancer cell lines. This study elucidates the underlying mechanisms of Copper-TA in PaCa cells. Control and Copper-TA (IC50) treated PaCa cells were processed by next-generation sequencing (NGS) to determine differentially expressed genes using HTG EdgeSeq Oncology Biomarker panel. Ingenuity Pathway Analysis (IPA®) was used to identify functional significance of altered genes. The conformational studies for assessing the expression of key regulators and genes were conducted by Western blot and qPCR. IPA® identified several networks, regulators, as well as molecular and cellular functions associated with cancer. The top 5 molecular and cellular functions affected by Cu-TA treatment were cell death and survival, cellular development, cell growth and proliferation, cell cycle and cellular movement. The expression of top upstream regulators was confirmed by Western blot analysis while qPCR results of selected genes demonstrated that Copper-TA is efficacious at lower doses than TA. Results suggest that Copper-TA alters genes/key regulators associated with cancer and potentially serve as an effective anti-cancer agent.

16.
Crit Rev Oncog ; 25(4): 355-363, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33639062

RESUMEN

Specificity protein (Sp) transcription factors regulate the expression of genes associated with several cellular processes and play a critical role in early development. Typically, Sp protein expression decreases with age in healthy adults. Research has shown that Sp proteins can impact the development and transformation of cancer cells and other oncogenic processes, including survival, proliferation, spread, and metastasis. Among the Sp proteins, Sp1, Sp3, and Sp4 have been the main targets of study as they are shown to be highly expressed in cancer cells compared to healthy cells. Increased levels of Sp1 are correlated with poor prognosis in some malignancies, including gastrointestinal cancers. In this review, we discuss the role of Sp transcription factors and examine their activities as pro-oncogenic factors in esophageal cancer (EC). Other aspects presented in this review are potential therapeutic options for EC that target Sp1. We summarize the published information on preclinical results using mithramycin and tolfenamic acid.


Asunto(s)
Neoplasias Esofágicas , Factores de Transcripción Sp , Carcinogénesis , Neoplasias Esofágicas/diagnóstico , Neoplasias Esofágicas/genética , Neoplasias Esofágicas/terapia , Humanos , Plicamicina/farmacología , Pronóstico , Factores de Riesgo , Factores de Transcripción Sp/genética , ortoaminobenzoatos/farmacología
17.
Crit Rev Oncog ; 25(2): 151-160, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33389864

RESUMEN

Current statistics related to cancer incidence and cancer-related death rates clearly show that specific racial/ethnic minorities are more likely to be diagnosed and/or die with cancer. Colorectal cancer (CRC) is one of the leading causes of cancer deaths in the United States and it disproportionately affects the non-Hispanic Black or African American (AA) population. When compared to the non-Hispanic White (nHW) population, incidence and death rates in AAs are 28% and 60% higher, respectively. Hispanics have an overall lower CRC incidence rate than nHWs (Hispanics: 35.5 per 100,000 population; nHWs: 40.2 per 100,000 population), but their incidence continues to rise, unlike nHWs, who are experiencing a decline. This disparity between Hispanics and nHWs is further highlighted in the younger Hispanic population. While the cause of the disparities is associated with CRC-related genetic and environmental factors, the role of specific genes/mutations in each population are still not fully unraveled. However, because CRC is a slowly progressing disease, routine screening and/or early intervention are key to achieving better outcomes in CRC patients and ultimately in closing the disparity gap among different populations. This review discusses the major factors influencing the disparities in CRC and also focuses on factors such as treatment response, family history, and screening that potentially contribute to the racial/ethnic disparities in CRC.


Asunto(s)
Neoplasias Colorrectales/etnología , Disparidades en el Estado de Salud , Neoplasias Colorrectales/epidemiología , Neoplasias Colorrectales/etiología , Neoplasias Colorrectales/mortalidad , Detección Precoz del Cáncer , Hispánicos o Latinos , Humanos , Incidencia , Pronóstico
18.
J Pediatr Hematol Oncol ; 42(4): e254-e257, 2020 05.
Artículo en Inglés | MEDLINE | ID: mdl-30531600

RESUMEN

Axial skeleton primary tumor, metastatic disease at presentation, incomplete surgical resection, and <90% tumor necrosis have all been known to influence prognosis adversely in osteosarcoma. Relapse of osteosarcoma, typically occurring within the first 18 months of therapy, with an incidence rate of 50% is treated with surgery, chemotherapy, and targeted therapy. Here, we discuss 2 patients treated with pazopanib, a multi-tyrosine kinase inhibitor presently approved to treat renal cell carcinoma and soft tissue sarcomas. Case 1 achieved positive response and remains on pazopanib. Case 2 sustained gastrointestinal toxicity requiring suspension of drug, despite achieving stable disease.


Asunto(s)
Neoplasias Óseas/tratamiento farmacológico , Recurrencia Local de Neoplasia/tratamiento farmacológico , Osteosarcoma/tratamiento farmacológico , Pirimidinas , Sulfonamidas , Adulto , Neoplasias Óseas/metabolismo , Neoplasias Óseas/patología , Femenino , Humanos , Indazoles , Masculino , Recurrencia Local de Neoplasia/metabolismo , Recurrencia Local de Neoplasia/patología , Osteosarcoma/metabolismo , Osteosarcoma/patología , Pirimidinas/administración & dosificación , Pirimidinas/efectos adversos , Sulfonamidas/administración & dosificación , Sulfonamidas/efectos adversos
19.
Crit Rev Oncog ; 24(2): 105-118, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31679206

RESUMEN

Pancreatic cancer affects both male and female individuals with higher incidences and death rates among the male population. Detection of this malignancy is delayed due to the lack of symptoms in the early-stage cancer, which makes it extremely difficult to treat. Identifying effective strategies has been a challenge for improving the survival rates in pancreatic cancer patients. Resistance to chemotherapy is often developed in pancreatic cancer treatment. Although many strategies are under clinical trials to target certain markers associated with cancer, immunotherapeutic approaches are currently gaining importance. Immunotherapy for pancreatic cancer is in the limelight after preclinical research showed some promise. Immunotherapy approaches were tested along with other treatment options to enhance the treatment effect. Adoptive cell transfer and immune checkpoint inhibitors are currently in clinical trials. The Food and Drug Administration approved pembrolizumab in a fast-tracked review for advanced pancreatic cancer patients. Pembrolizumab blocks the checkpoint protein, programmed cell death protein 1 (PD-1), on T cells to boost the response of the immune system against cancer cells, thereby shrinking tumors. The recent developments in immunotherapy and the early success in other cancers are encouraging to further test immunotherapy in pancreatic cancer. The combination of pembrolizumab and pelareorep, an isolate of human reovirus, is in phase II clinical study in metastatic disease. Depending on the results of current clinical trials and testing, the strategies in the pipeline are expected to increase the use of immunotherapy in the clinical testing setting. Success in immunotherapy is urgently needed to address the side-effects, treating patients with advanced disease and reducing metastasis for increasing the survival rate in pancreatic cancer patients.


Asunto(s)
Anticuerpos Monoclonales Humanizados/uso terapéutico , Inmunoterapia , Neoplasias Pancreáticas/terapia , Antineoplásicos Inmunológicos/uso terapéutico , Ensayos Clínicos como Asunto , Femenino , Humanos , Masculino , Neoplasias Pancreáticas/tratamiento farmacológico , Neoplasias Pancreáticas/metabolismo , Receptor de Muerte Celular Programada 1/antagonistas & inhibidores
20.
Cancer Med ; 8(16): 7018-7031, 2019 11.
Artículo en Inglés | MEDLINE | ID: mdl-31560828

RESUMEN

Of all the gynecologic tumors, ovarian cancer (OC) is known to be the deadliest. Advanced-stages of OC are linked with high morbidity and low survival rates despite the immense amount of research in the field. Shortage of promising screening tools for early-stage detection is one of the major challenges linked with the poor survival rate for patients with OC. In OC, therapeutic management is used with multidisciplinary approaches that includes debulking surgery, chemotherapy, and (rarely) radiotherapy. Recently, there is an increasing interest in using immunomodulation for treating OC. Relapse rates are high in this malignancy and averages around every 2-years. Further treatments after the relapse are more intense, increasing the toxicity, resistance to chemotherapy drugs, and financial burden to patients with poor quality-of-life. A procedure that has been studied to help reduce the morbidity rate involves pre-sensitizing cancer cells with standard therapy in order to produce optimal results with minimum dosage. Utilizing such an approach, platinum-based agents are effective due to their increased response to platinum-based chemotherapy in relapsed cases. These chemo-drugs also help address the issue of drug resistance. After conducting an extensive search with available literature and the resources for clinical trials, information is precisely documented on current research, biomarkers, options for treatment and clinical trials. Several schemes for enhancing the therapeutic responses for OC are discussed systematically in this review with an attempt in summarizing the recent developments in this exciting field of translational/clinical research.


Asunto(s)
Neoplasias Ováricas/terapia , Animales , Apoptosis/genética , Biomarcadores , Vacunas contra el Cáncer/uso terapéutico , Resistencia a Múltiples Medicamentos , Resistencia a Antineoplásicos , Detección Precoz del Cáncer , Femenino , Humanos , Inmunoterapia , Tamizaje Masivo , Terapia Molecular Dirigida , Neoplasias Ováricas/diagnóstico , Neoplasias Ováricas/genética , Neoplasias Ováricas/patología
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