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The Coronavirus disease 2019 (COVID-19) affects several tissues, including the central and peripheral nervous system. It has also been related to signs and symptoms that suggest neuroinflammation with possible effects in the short, medium, and long term. Estrogens could have a positive impact on the management of the disease, not only due to its already known immunomodulator effect, but also activating other pathways that may be important in the pathophysiology of COVID-19, such as the regulation of the virus receptor and its metabolites. In addition, they can have a positive effect on neuroinflammation secondary to pathologies other than COVID-19. The aim of this study is to analyze the molecular mechanisms that link estrogens with their possible therapeutic effect for neuroinflammation related to COVID-19. Advanced searches were performed in scientific databases as Pub- Med, ProQuest, EBSCO, the Science Citation index, and clinical trials. Estrogens have been shown to participate in the immune modulation of the response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In addition to this mechanism, we propose that estrogens can regulate the expression and activity of the Angiotensin-converting enzyme 2 (ACE2), reestablishing its cytoprotective function, which may be limited by its interaction with SARS-CoV-2. In this proposal, estrogens and estrogenic compounds could increase the synthesis of Angiotensin-(1-7) (Ang-(1-7)) that acts through the Mas receptor (MasR) in cells that are being attacked by the virus. Estrogens can be a promising, accessible, and low-cost treatment for neuroprotection and neuroinflammation in patients with COVID-19, due to its direct immunomodulatory capacity in decreasing cytokine storm and increasing cytoprotective capacity of the axis ACE2/Ang (1-7)/MasR.
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COVID-19 , Humanos , SARS-CoV-2/metabolismo , Enzima de Conversão de Angiotensina 2/metabolismo , Sistema Renina-Angiotensina/fisiologia , Peptidil Dipeptidase A/metabolismo , Doenças Neuroinflamatórias , Estrogênios/uso terapêutico , Neuroproteção , Fatores Imunológicos/farmacologia , Fatores Imunológicos/uso terapêuticoRESUMO
Aim: pharmaceutical patenting activity in developing countries, including Mexico, is unknown. Objective: determine the activity of pharmaceutical patents by Mexican universities. Method: using 'university' as keyword and A61K, A61P and C07 as International Patent Classification codes, was searched to generate a perspective of pharmaceutical patent applications by Mexican universities. Results: 227 patents (186 granted patents + 41 not-granted patents) were claimed in the period 2000-2018. The leading university was the National Autonomous University of Mexico, followed by the Instituto Politecnico Nacional, Universidad Autonoma de Nuevo León and Universidad Autonoma de Puebla. The pharmaceutical concerns addressed were led by the fields of infectious, cancer and diabetes. Conclusion: in Mexican universities, the licensing of pharmaceutical patents is still in its early stages.
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Universidades , Humanos , México , Preparações FarmacêuticasRESUMO
Aim: the activity of patent claims by Mexican pharmaceutical companies is unknown. Objective: analyse the trend in patents of Mexican pharmaceutical companies. Method: a search for patents was carried out in the patent database of the Mexican Institute of Industrial Property, using the list of Mexican pharmaceutical companies belonging to the Mexican Association of Pharmaceutical Research Industries, and the codes A61K, A61P and C07 of the International Patent Classification. Results: the leading companies in patent applications were Liomont, Senosiain and RIMSA; however, Mexican pharmaceutical companies claim very few patents, only 266 patent applications in the period 2000-2020, with a technological factor with a value of zero, and a commercial factor of little value. Conclusion: Mexican pharmaceutical companies lack a robust patent system, without growth, and with a low percentage of patents with high commercial value.
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Biotecnologia , Indústria Farmacêutica , Preparações FarmacêuticasRESUMO
Resumen Ante la transición a universidades emprendedoras, existe la tendencia a incrementar el patentamiento, aunque sin un estudio profundo del potencial comercial, por lo que el porcentaje de los productos que lo logran es muy bajo. El objetivo de esta investigación fue diseñar una estrategia de evaluación tecnológica y comercial de patentes universitarias a partir de la identificación de oportunidades en transferencia de tecnología (TT). Para ello, se examinaron 269 solicitudes de patente de la Benemérita Universidad Autónoma de Puebla (BUAP) y de la Universidad Autónoma del Estado de Morelos (UAEM), de acuerdo con la Clasificación Internacional de Patentes (CIP), en un periodo de 10 años (2009-2018), mediante 4 pasos: (a) construcción de la base de datos con la herramienta del Instituto Mexicano de Propiedad Intelectual, (b) identificación de las capacidades inventivas, a través de la Organización Mundial de la Propiedad Intelectual, (c) distribución por industrias de intensidad y oportunidad de mercado tecnológico, de acuerdo con la Organización para la Cooperación y el Desarrollo Económicos, y (d) análisis del comportamiento del mercado, mediante el estudio de las 36 solicitudes del área farmacéutica de ambas universidades. Los resultados mostraron que el 68.4 % de la BUAP y 75.6 % de la UAEM presentan un posicionamiento competitivo predominante en industrias de alta y mediana-alta tecnología. La ventaja de la herramienta propuesta es que permite reconocer la oportunidad del mercado tecnológico a partir de la construcción de escenarios relacionados con el comportamiento de la CIP.
Abstract Given the transition to entrepreneurial universities, there is a tendency to increase patenting, although without a deep study of the commercial potential. Therefore, the percentage of those developments that succeed is very low. The objective of this research was to develop a strategy for the technological and commercial evaluation of university patents, based on the identification of commercial opportunities in technology transfer (TT). Patent applications from the Benemerita Universidad Autonoma de Puebla (BUAP) and the Universidad Autonoma del Estado de Morelos (UAEM) were used for the study. The methodology consisted of the analysis of 269 patent applications in a period of 10 years 2009-2018, in accordance with the statistical International Patent Classification (IPC), through 4 steps: (a) construction of the patent database, with the use of the patent tool of the Mexican Institute of Intellectual Property, (b) identification of inventive capabilities, through the World Intellectual Property Organization, (c) distribution by industries of intensity and technological market opportunity, with the tool of the Organization for Economic Cooperation and Development, and (d) analysis of market behavior, through the study of the 36 applications of the pharmaceutical patent area, from both universities. The results showed that 68.4 % of BUAP and 75.6 % of UAEM reflected a predominantly competitive positioning in high technology and medium-high technology industries. The advantage of the proposed tool is that it allows the recognition of the technological market opportunity based on the construction of scenarios related to the IPC behavior.
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INTRODUCTION: OX40 is an immune checkpoint in cancer and its presence in cancer is a good prognosis, making it a highly relevant target for the development of new immunotherapies. AREAS COVERED: The patent literature reveals vital information on new trends in cancer therapies. The authors used the patent databases of the six major patent offices in the world: United States Patent and Trademark Office, European Patent Office, World Intellectual Property Organization, Japan Patent Office, State Office of Intellectual Property of China and Korean Intellectual Property Office, to generate a panorama of patents related to OX40 agonists. Specific patents have been grouped into innovative patents and adoption patents. EXPERT OPINION: An increasing trend in the development of OX40 agonists in cancer, particularly in the years 2018 and 2019. United States was the leader in generating patents, followed by China and England. Major pharmaceutical companies have at least one anti-OX40 agonist, MEDI6469 and MEDI-0562 (AstraZeneca), PF-04518600 (Pfizer), GSK3174998 (GlaxoSmithKline), BMS-986,178 (Bristol-Myers Squibb) and MOXR0916 (Roche), which represent 68% of clinical trials conducted with OX40 agonists.
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Antineoplásicos/farmacologia , Neoplasias/tratamento farmacológico , Receptores OX40/agonistas , Animais , Desenvolvimento de Medicamentos , Humanos , Imunoterapia , Neoplasias/imunologia , Neoplasias/patologia , Patentes como Assunto , Receptores OX40/imunologiaRESUMO
BACKGROUND: Primary and metastatic bone tumor incidence has increased in the previous years. Pain is a common symptom and is one of the most important related factors to the decrease of quality of life in patients with bone tumor. Different pain management strategies are not completely effective and many patients afflicted by cancer pain cannot be controlled properly. In this sense, we need to elucidate the neurophysiology of cancer-induced pain, contemplating other components such as inflammation, neuropathies and cognitive components regarding bone tumors, and thus pave the way for novel therapeutic approaches in this field. AIM: This study aims to identify the neurophysiology of the mechanisms related to pain management in bone tumors. METHODS: Advanced searches were performed in scientific databases: PubMed, ProQuest, EBSCO, and the Science Citation index to get information about the neurophysiology mechanisms related to pain management in bone tumors. RESULTS: The central and peripheral mechanisms that promote bone cancer pain are poorly understood. Studies have shown that bone cancer could be related to neurochemicals produced by tumor and inflammatory cells, coupled with peripheral sensitization due to nerve compression and injury caused by tumor growth. The activity of mesolimbic dopaminergic neurons, substance P, cysteine/ glutamate antiporter, and other neurochemical dynamics brings us putative strategies to suggest better and efficient treatments against pain in cancer patients. CONCLUSION: Cancer-induced bone pain could include neuropathic and inflammatory pain, but with different modifications to the periphery tissue, nerves and neurochemical changes in different neurological levels. In this sense, we explore opportunity areas in pharmacological and nonpharmacological pain management, according to pain-involved mechanisms in this study.
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Neoplasias Ósseas , Neoplasias Ósseas/complicações , Neoplasias Ósseas/terapia , Humanos , Dor/tratamento farmacológico , Dor/etiologia , Manejo da Dor , Traumatismos dos Nervos Periféricos , Qualidade de VidaRESUMO
INTRODUCTION: PD-L1 and PD-1 are two immune checkpoints and their presence in various types of tumors is related to a poor prognosis; this makes them highly relevant targets in the development of new therapies. Patent US2019010232 describes bispecific anti-PD-L1/PD-1 antibodies made with Azymetric technology. AREAS COVERED: Three bispecific antibodies that target PD-L1/PD-1 are described in US2019010232 patent and are proposed to play a relevant role in the treatment of cancer. EXPERT OPINION: Three bispecific antibodies that target PD-L1/PD-1 in US2019010232 demonstrated anti-tumor activity in lung cancer. However, no evidence is shown of the action of the antibodies against other cancers. An advantage of the bispecific antibodies of US2019010232 over combinatorial therapy is a greater decrease in tumor volume.
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Anticorpos Biespecíficos/administração & dosagem , Antineoplásicos Imunológicos/administração & dosagem , Neoplasias/tratamento farmacológico , Animais , Anticorpos Biespecíficos/farmacologia , Antineoplásicos Imunológicos/farmacologia , Antígeno B7-H1/antagonistas & inibidores , Humanos , Neoplasias/patologia , Patentes como Assunto , Receptor de Morte Celular Programada 1/antagonistas & inibidores , Carga TumoralRESUMO
INTRODUCTION: Due to the primary role of PD-1 and LAG-3 in regulating the immune response in tumors, there is a need to develop therapies focused on the inhibition of PD-1 and LAG-3 in order to improve the immune response in patients with cancer. The authors of US2018326054 patent propose a method to eradicate cancer by using bispecific anti-PD-1/LAG-3 antibodies. AREAS COVERED: The US2018326054 patent describes anti-PD-1/LAG3 antibodies, pharmaceutical composition that contains it, and their application for cancer treatment, particularly pancreatic carcinoma. Proof concept and preclinical results show anti-PD-1/LAG-3 bispecific antibodies bind and are internalized by CD4 + T cells thereby increasing their effector functions (release of Granzyme B and INF-γ) in the presence of tumor cells, and completely suppress tumors in a murine model. EXPERT OPINION: Anti-PD-1/LAG-3 bispecific antibodies of the US2018326054 patent are new in a general concept, but treatment data is only shown for pancreatic carcinoma. The results to be obtained in future clinical trials of safety and efficacy could conclude whether these bispecific anti-PD-1/LAG-3 antibodies will be useful in a cancer treatment scheme.
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Anticorpos Biespecíficos/administração & dosagem , Antígenos CD/imunologia , Neoplasias/terapia , Receptor de Morte Celular Programada 1/imunologia , Animais , Anticorpos Biespecíficos/imunologia , Humanos , Imunoterapia/métodos , Camundongos , Neoplasias/imunologia , Neoplasias Pancreáticas/imunologia , Neoplasias Pancreáticas/terapia , Patentes como Assunto , Proteína do Gene 3 de Ativação de LinfócitosRESUMO
Introduction: LAG-3 is checkpoint inhibitor in cancer that coordinates the downregulation of the proliferation of antigen-specific lymphocytes. There is a great need to discover and develop new therapies focused on inhibiting the action of LAG-3 and consequently improving the immune response in the various types of cancer. Areas covered: The patent literature reveals novel therapies, which provide information on cancer therapies. The authors used the patent databases of the six main patent offices of the world: United States Patent and Trademark Office, European Patent Office, World Intellectual Property Organization, Japan Patent Office, State Intellectual Property Office of China and Korean Intellectual Property Office, to generate a detailed landscape of patents and patent applications of active companies related to LAG-3 inhibitors. Specific patents have been grouped into innovative patents and adopting patents. Expert opinion: There is a continuing development of LAG-3 inhibitors, and these inhibitors are being used in combination with other cancer treatment schemes, for example, antibodies against PD-1, PD-L1, and CTLA-4. Immutep and IO Therapeutics were the leaders in generating innovator patents, followed by Gustave Roussy Institute, and Applied Research Systems ARS. Dana-Farber Cancer Institute was the leader in the generation of adopter patents, followed by Novartis .
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Antígenos CD/efeitos dos fármacos , Antineoplásicos/farmacologia , Neoplasias/tratamento farmacológico , Animais , Anticorpos/administração & dosagem , Antígenos CD/imunologia , Antígenos CD/metabolismo , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/imunologia , Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Desenvolvimento de Medicamentos/métodos , Humanos , Neoplasias/imunologia , Neoplasias/patologia , Patentes como Assunto , Proteína do Gene 3 de Ativação de LinfócitosRESUMO
Introduction: TIM3 and PD-1 are checkpoint inhibitors in cancer that coordinate the downregulation of the proliferation of antigen-specific lymphocytes. There is a great need to discover and develop new therapies focused on inhibiting the action of TIM3 and PD-1 and consequently improving the immune response in the various types of cancer. The authors of patent EP3356411A1 propose several anti-TIM3/anti-PD-1 bispecific antibodies, as well as the method for producing them and their pharmacological application in the treatment of cancer. Areas covered: Patent EP3356411A1 describes a method by producing anti-TIM3/anti-PD-1 bispecific antibodies and their potential in cancer treatment. Expert opinion: Data supporting the patent demonstrate the ability by producing anti-TIM3/anti-PD-1 bispecific antibodies. Although the proposed methodology is very interesting and promising, further studies are necessary to assess the clinical applicability of the inventions on cancer.
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Anticorpos Biespecíficos/administração & dosagem , Imunoterapia/métodos , Neoplasias/terapia , Animais , Anticorpos Biespecíficos/imunologia , Receptor Celular 2 do Vírus da Hepatite A/imunologia , Humanos , Neoplasias/imunologia , Patentes como Assunto , Receptor de Morte Celular Programada 1/imunologiaRESUMO
BACKGROUND: Cancer is one of the leading causes of death in the world and it is necessary to develop new strategies for its treatment because most therapies have limited access to many types of tumors, as well as low therapeutic efficacy and high toxicity. OBJECTIVE: The present research aims to identify recent patents of drug delivery nanostructured systems that may have application in improving cancer treatment. METHODS: Recent patents regarding the drug delivery nanostructured systems for cancer treatment were obtained from the patent databases of the six main patent offices of the world: United States Patent and Trademark Office, European Patent Office, World Intellectual Property Organization, Japan Patent Office, State Intellectual Property Office of China and Korean Intellectual Property Office. RESULTS: A total of 1710 patent documents from 1998 to 2017 including "drug delivery nanostructured systems for cancer treatment" were retrieved. The top five countries in patent share were USA, China, South Korea, Canada and Germany. The universities and enterprises of USA had the highest amount of patents followed by institutions from China. CONCLUSION: There is a strong tendency for the development of new nanostructured systems for the release of drugs; particularly, in recent years, the development of nanoparticles has focused on nanodiscs, gold nanoparticles and immunoliposomes.
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Antineoplásicos/administração & dosagem , Portadores de Fármacos/administração & dosagem , Sistemas de Liberação de Medicamentos/métodos , Nanoestruturas/administração & dosagem , Neoplasias/tratamento farmacológico , Patentes como Assunto , Animais , Antineoplásicos/química , Portadores de Fármacos/química , Humanos , Nanoestruturas/químicaRESUMO
BACKGROUND: Despite dramatic advances in cancer treatment that lead to long-term survival, there is an increasing number of patients presenting with clinical manifestations of cerebral metastasis in breast cancer, for whom only palliative treatment options exist. OBJECTIVE: The present review based on researches aims to provide identification of recent patens of breast cancer brain metastasis that may have application in improving cancer treatment. METHODS: Recent patents regarding the breast cancer brain metastasis were obtained from USPTO patent databases, Esp@cenet, Patentscope and Patent Inspiration®. RESULTS: A total of 55 patent documents and 35 drug targets were recovered. Of these, a total of 45 patents and 10 patents were biotech drugs and chemical drugs, respectively. Among the target drugs analyzed were neurotrophin-3, protocadherin 7, CXCR4, PTEN, GABA receptor 3, L1CAM, PI3K-Akt / mTOR, VEGFR2, Claudin-5, Occludin, and NKG2A, among others. CONCLUSION: In this study, we found 35 drug targets for metastasis to the brain in breast cancer, with 60% of them including only one patent, which establishes that this area of research is very recent, and that these targets have recently been linked to metastasis to the brain. On the other hand, 19 drug targets, among them VEGF, VEGFR2, CXCL12, and CXCR4, have been addressed for the first time until 6 years ago, confirming that the development of drugs for brain metastasis in breast cancer is an incipient area, but with interesting potential. Interestingly, the stage of inside the brain, was the stage with the lowest amount of drug targets, which places it as a priority for research and drug development.
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Antineoplásicos/uso terapêutico , Neoplasias Encefálicas/tratamento farmacológico , Neoplasias Encefálicas/secundário , Neoplasias da Mama/tratamento farmacológico , Patentes como Assunto , Animais , Antineoplásicos/farmacologia , Neoplasias Encefálicas/diagnóstico , Neoplasias da Mama/diagnóstico , Feminino , Humanos , Fragmentos de Peptídeos/farmacologia , Fragmentos de Peptídeos/uso terapêutico , Transdução de Sinais/efeitos dos fármacos , Transdução de Sinais/fisiologia , Resultado do TratamentoRESUMO
Plants from the Bursera genus are widely distributed in the tropical dry forests of Mexico. In traditional medicine, extracts from different species of Bursera have been used for a wide range of biological activities, including the treatment of cancer-related symptoms. Compounds present in the Bursera genus include lignans, flavonoids, steroids, short-chain aliphatic alkanes, acetates, alcohols, ketones, and terpenoids. In some instances, secondary metabolites of these classes of compounds may induce cytotoxicity, and therefore we sought to investigate the effects of B. copallifera leaf extracts in breast cancer cell lines to evaluate their potential therapeutic value for the treatment of breast cancer, one of the most prevalent types of cancer in women worldwide. Two B. copallifera leaf extracts exerted cytotoxic effects on both the MCF7 and MDA-MB-231 breast cancer cell line models. The cytotoxic effect was more evident in the MDA-MB-231 triple negative cell line inhibiting also the migration of these cells. We identified hydroxycinnamic acid and flavonol derivatives as major phenolic components of the extracts. Our results strongly suggest a potential use of the Bursera leaf extracts rich in phenolic compounds, their individual phenolic compounds, or their combinations for the treatment of breast cancer.
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Neoplasias da Mama/tratamento farmacológico , Bursera/química , Movimento Celular/efeitos dos fármacos , Citotoxinas/farmacologia , Extratos Vegetais/farmacologia , Linhagem Celular Tumoral , Feminino , Humanos , Células MCF-7RESUMO
Alternative splicing is a key molecular mechanism now considered as a hallmark of cancer that has been associated with the expression of distinct isoforms during the onset and progression of the disease. The leading cause of cancer-related deaths in women worldwide is breast cancer, and even when the role of alternative splicing in this type of cancer has been established, the function of this mechanism in breast cancer biology is not completely decoded. In order to gain a comprehensive view of the role of alternative splicing in breast cancer biology and development, we summarize here recent findings regarding alternative splicing events that have been well documented for breast cancer evolution, considering its prognostic and therapeutic value. Moreover, we analyze how the response to endocrine and chemical therapies could be affected due to alternative splicing and differential expression of variant isoforms. With all this knowledge, it becomes clear that targeting alternative splicing represents an innovative approach for breast cancer therapeutics and the information derived from current studies could guide clinical decisions with a direct impact in the clinical advances for breast cancer patients nowadays.
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BACKGROUND: Data mining publications and patent data can provide decision support for scientists, inventors and industry in the field of cancer research. OBJECTIVE: The main objective of this article it to identify trends of research and patent generation productivity originating from Latin American countries in the field of cancer. METHOD: Publications were collected from the Scopus, Web of Science, PubMed database; and patents were collected from Latipat Espacenet databases. Data from January 1, 2000 until December 31, 2014 were searched for documents with specific words in cancer as a ''topic'' and a list of 20 Latin American countries as affiliation country. RESULTS: A total of 12,989 items published and 244 patent applications including "cancer" were retrieved. Brazil, Mexico, Argentina, Chile and Peru were highest contributors in cancer research, while Brazil, Mexico, Cuba and Argentina were highest contributors in cancer patent applications. CONCLUSION: The analysis of the data from this study provides an overview of research and patent activity in Latin America in the cancer field, which can be useful to help health policy makers and people in academia to shape up cancer research in the future.
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Antineoplásicos/uso terapêutico , Pesquisa Biomédica/tendências , Neoplasias/tratamento farmacológico , Patentes como Assunto , Pesquisa Biomédica/métodos , Humanos , América Latina/epidemiologia , Neoplasias/epidemiologiaRESUMO
En la búsqueda de una vacuna experimental efectiva contra Trichinella spiralis se han utilizado diferentes estrategias, pero el grado de protección alcanzado en la casi totalidad de los ensayos es insuficiente para lograr un adecuado control de la enfermedad. En la literatura hay evidencias de que moléculas inhibidoras de la activación de los linfocitos T están implicadas en la regulación de la respuesta inmune contra los helmintos. El bloqueo de estas moléculas puede ser un blanco potencial para el tratamiento de las infecciones causadas por estos parásitos. Por otra parte, se ha informado que la inmunización con productos de excreción-secreción de larvas musculares de T. spiralis proporciona una inmunidad protectora parcial. La infección con el parásito induce una elevada población de linfocitos T reguladores que modulan la respuesta inmune. En este trabajo encontramos que la inmunización con antígenos de excreción-secreción de larvas musculares, más el bloqueo de la molécula inhibidora CTLA-4 en los linfocitos T, causa una significativa reducción de las larvas del parásito en un modelo experimental murino. De esta forma, queda demostrado que la eliminación del efecto supresor inducido por el helminto da por resultado una respuesta Th2 protectora más potente(AU)
Different approaches to vaccination against T. spiralis using murine experimental models have been used, but the levels of protection observed in most experimental trials may not be sufficient to provide a good disease control. There is increasing evidence that inhibitors molecules on T cells are critically involved in the regulation of immune response against helminths infections, thus negative stimulators represent possible drug targets since their blockade leads to an increased immune response. Moreover, it has been reported that immunization with excretory-secretory products of T. spiralis muscular larvae could provide partial protective immunity against parasite infection. T. spiralis induce a population of cells with elevated levels of known markers of T regulatory, manipulation of which influences the immune response and parasite load. In the present work we found that immunization with muscle larvae excretory secretory products of T. spiralis and blockade of CTLA-4 displayed remarkable high reduction of muscle larvae burdens in a murine model, showing that elimination of suppressive regulatory pathways results in a more potent and protective The response which reduces muscle larval establishment(AU)
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Anticorpos Anti-Helmínticos , Antígeno CTLA-4 , Triquinelose/prevenção & controle , Doenças Parasitárias em Animais/prevenção & controleRESUMO
En la búsqueda de una vacuna experimental efectiva contra Trichinella spiralis se han utilizado diferentes estrategias, pero el grado de protección alcanzado en la casi totalidad de los ensayos es insuficiente para lograr un adecuado control de la enfermedad. En la literatura hay evidencias de que moléculas inhibidoras de la activación de los linfocitos T están implicadas en la regulación de la respuesta inmune contra los helmintos. El bloqueo de estas moléculas puede ser un blanco potencial para el tratamiento de las infecciones causadas por estos parásitos. Por otra parte, se ha informado que la inmunización con productos de excreción-secreción de larvas musculares de T. spiralis proporciona una inmunidad protectora parcial. La infección con el parásito induce una elevada población de linfocitos T reguladores que modulan la respuesta inmune. En este trabajo encontramos que la inmunización con antígenos de excreción-secreción de larvas musculares, más el bloqueo de la molécula inhibidora CTLA-4 en los linfocitos T, causa una significativa reducción de las larvas del parásito en un modelo experimental murino. De esta forma, queda demostrado que la eliminación del efecto supresor inducido por el helminto da por resultado una respuesta Th2 protectora más potente(AU)
Different approaches to vaccination against T. spiralis using murine experimental models have been used, but the levels of protection observed in most experimental trials may not be sufficient to provide a good disease control. There is increasing evidence that inhibitors molecules on T cells are critically involved in the regulation of immune response against helminths infections, thus negative stimulators represent possible drug targets since their blockade leads to an increased immune response. Moreover, it has been reported that immunization with excretory-secretory products of T. spiralis muscular larvae could provide partial protective immunity against parasite infection. T. spiralis induce a population of cells with elevated levels of known markers of T regulatory, manipulation of which influences the immune response and parasite load. In the present work we found that immunization with muscle larvae excretory secretory products of T. spiralis and blockade of CTLA-4 displayed remarkable high reduction of muscle larvae burdens in a murine model, showing that elimination of suppressive regulatory pathways results in a more potent and protective The response which reduces muscle larval establishment(AU)
Assuntos
HumanosRESUMO
PURPOSE: To evaluate the recent incidence and mortality of and scientific research trends in cervical cancer in Mexican females. MATERIALS AND METHODS: Data between 2000 and 2010 from the Department of Epidemiology of the Ministry of Health, and International Agency for Research on Cancer (IARC) of World Health Organization were analyzed, and age-standardized rates (ASRs) were calculated. In addition, scientific research data were retrieved from the Web of Science database from 2003 to 2012, using different terms related to cervical cancer. RESULTS: The incidence rate decreased during last five years, while mortality rates showed an annual decrease of 4.93%. A total of 780 articles were retrieved, and the institutions with the majority of publications were National Autonomous University of Mexico (34.87%), Social Security Mexican Institute (16.02%), and National Institute of Cancerology (15%). The main types of research were treatment, diagnosis, and prevention. CONCLUSIONS: The above results show that incidence of cervical cancer decreased over time in Mexico during last five years; similarly, the downturn observed in mortality mainly reflects improved survival as a result of earlier diagnosis and cancer treatment. Also, this article demonstrates the usefulness of bibliometrics to address key evaluation questions and to establish priorities, define future areas of research, and develop cervical cancer control strategies in Mexico.
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Pesquisa Biomédica/tendências , Detecção Precoce de Câncer/tendências , Neoplasias do Colo do Útero/epidemiologia , Adulto , Distribuição por Idade , Idoso , Bibliometria , Bases de Dados Factuais , Detecção Precoce de Câncer/métodos , Feminino , Humanos , Incidência , México/epidemiologia , Pessoa de Meia-Idade , Avaliação das Necessidades , Estudos Retrospectivos , Medição de Risco , Análise de Sobrevida , Taxa de Sobrevida , Neoplasias do Colo do Útero/patologiaRESUMO
The objective of this study was to investigate the recent incidence and mortality trends for breast cancer in Mexican females. Data between 2000 and 2010 from the Department of Epidemiology of the Ministry of Health, and International Agency for Research on Cancer (IARC) were analyzed. Age-standardized rates (ASRs) and annual percent changes (APCs) were calculated. The absolute incidence and mortality rates of breast cancer increased: 3,726 and 4,615 in 2000 to 8,545 and 4,966 in 2010, respectively. Incidence increased over time in all age groups tested, the 60-64 age group had the highest ASR (57.4 per 100,000 women in 2010), while the 20-44 age group had the lowest ASR (12.3 in 2010). The results show that incidence of breast cancer has increased in Mexico during last one decade, especially among older women, while the downturn observed in mortality mainly reflects improved survival as a result of earlier diagnosis and better cancer treatment.