检索结果-南通市图书馆

Phytochemical Analysis and Antioxidant Activity of Aqueous and Hydroethanolic Extracts from Three Anticancerous Fabaceae of Northern Cameroon Pharmacopoeia

引用

Journal of Biosciences and Medicines 2024年第6期12卷 19-32页

作者： Halmata Mohamadou Landry Lienou Lienou richard simo tagne Herve Pabamé Kada Elisee Libert Enyengue Embolo Grace Kembaou Nganwa Jean Louis Oyono Essame Piere Michel Dongmo Jazet Anatomy and Cytology Pathology Laboratory Institute of Medical Research and Medicinal Plants Studies (IMPM) Yaound Cameroon Department of Biochemistry Faculty of Science University of Douala Douala Cameroon Department of Biomedical Sciences University of Ngaoundere Ngaoundere Cameroon General Hospital of Garoua (HGG) Garoua Cameroon Anatomo-Cytopathology Department of Biological Sciences Faculty of Medicine and Pharmacy University of Douala Douala Cameroon

Background: Cancer continues to pose a significant threat to our society, representing one of the most pressing health concerns worldwide. This study aimed to evaluate the chemical composition and the antioxidant activity of aqueous and hydroethanolic extracts from Acacia nilotica (An), Bauhinia reticulate (Br), and Tamarindus indica (Ti) of Fabaceae family, traditionally used in Northern Cameroon for cancer treatment. Methods: The phytochemical screening of the three plants was conducted using conventional colorimetric methods, followed by the measurement of total phenol content, flavonoids, and tannins. The antiradical and antioxidant activities of both plant extracts were assessed through FRAP, ABTS, and DPPH methods. A principal components analysis was employed to correlate the quantities of the evaluated secondary metabolites with the activities. Results: Both types of extracts from the three plants contain alkaloids, saponins, flavonoids, phenolic compounds, tannins, glycosides, terpenoids, coumarins, anthocyanins, and anthraquinones. The aqueous extracts of Br and An are significantly richer (p Conclusion: The three Fabaceae plants from northern Cameroon, prepared in different solvents, can be utilized for their antiradical properties in cancer treatment.

关键词： Cancer Antioxidant Fabaceae Phenolic Compounds Aqueous Extract Hydroethanolic Extract

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Emerging data supporting stromal cell therapeutic potential in cancer:reprogramming stromal cells of the tumor microenvironment for anti-cancer effects

引用

Cancer Biology & Medicine 2020年第4期17卷 828-841页

作者： Armel H.Nwabo Kamdje Paul F.Seke Etet richard tagne simo Lorella Vecchio Kiven Erique Lukong Mauro Krampera Department of Biomedical Sciences University of NgaoundereFaculty of ScienceNgaoundere 454Cameroon Department of Physiological Sciences and Biochemistry University of NgaoundereGaroua 454Cameroon Center for Sustai nable Health and Development Garoua 454Cameroon Department of Biochemistry Microbiology&ImmunologyUniversity of SaskatchewanCollege of MedicineSaskatoon SK S7N 5E5Canada Department of Medicine University of VeronaSection of HematologyStem Cell Research LaboratoryVerona 37134Italy

After more than a decade of controversy on the role of stromal cells in the tumor microenvironment,the emerging data shed light on pro-tumorigenic and potential anti-cancer factors,as well as on the roots of the *** discuss the pro-tumorigenic effects of stromal cells,considering the effects of tumor drivers like hypoxia and tumor stiffness on these cells,as well as stromal cell-mediated adiposity and immunosuppression in the tumor microenvironment,and cancer initiating cells'cellular senescence and adaptive *** summarize the emerging data supporting stromal cell therapeutic potential in cancer,discuss the possibility to reprogram stromal cells of the tumor microenvironment for anti-cancer effects,and explore some causes of discrepancies on the roles of stromal cells in cancer in the available literature.

关键词： Stromal cells tumorigenic effects anti-cancer effects tumor microenvironment reprogramming

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Developmental pathways associated with cancer metastasis:Notch,Wnt,and Hedgehog

引用

Cancer Biology & Medicine 2017年第2期14卷 109-120页

作者： Armel Herve Nwabo Kamdje Paul Takam Kamga richard tagne simo Lorella Vecchio Paul Faustin Seke Etet Jean Marc Muller Giulio Bassi Erique Lukong Raghuveera Kumar Goel Jeremie Mbo Amvene Mauro Krampera Department of Biomedical Sciences University of Ngaoundere Laboratory University of Verona Department of Basic Health SciencesCollege of Applied Medical SciencesQassim University Faculty of Science University of Poitiers Department of Biochemistry College of MedicineUniversity of Saskatchewan

Master developmental pathways, such as Notch, Wnt, and Hedgehog, are signaling systems that control proliferation, cell death,motility, migration, and stemness. These systems are not only commonly activated in many solid tumors, where they drive or contribute to cancer initiation, but also in primary and metastatic tumor development. The reactivation of developmental pathways in cancer stroma favors the development of cancer stem cells and allows their maintenance, indicating these signaling pathways as particularly attractive targets for efficient anticancer therapies, especially in advanced primary tumors and metastatic cancers. Metastasis is the worst feature of cancer development. This feature results from a cascade of events emerging from the hijacking of epithelial-mesenchymal transition, angiogenesis, migration, and invasion by transforming cells and is associated with poor survival, drug resistance, and tumor relapse. In the present review, we summarize and discuss experimental data suggesting pivotal roles for developmental pathways in cancer development and metastasis, considering the therapeutic potential. Emerging targeted antimetastatic therapies based on Notch, Wnt, and Hedgehog pathways are also discussed.

关键词： Cancer metastasis developmental pathways Notch Wnt Hedgehog therapeutic targets

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mesenchymal stromal cells' role in tumor microenvironment:involvement of signaling pathways

引用

Cancer Biology & Medicine 2017年第2期14卷 129-141页

Mesenchymal stromal cells(MSCs) are adult multipotent stem cells residing as pericytes in various tissues and organs where they can differentiate into specialized cells to replace dying cells and damaged tissues. These cells are commonly found at injury sites and in tumors that are known to behave like "wounds that do not heal." In this article, we discuss the mechanisms of MSCs in migrating, homing, and repairing injured tissues. We also review a number of reports showing that tumor microenvironment triggers plasticity mechanisms in MSCs to induce malignant neoplastic tissue formation, maintenance, and chemoresistance, as well as tumor growth. The antitumor properties and therapeutic potential of MSCs are also discussed.

关键词： Mesenchymal stromal cells systemic circulation migration homing tumor modulation signaling pathways chemoresistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Role of signaling pathways in the interaction between microbial,inflammation and cancer

引用

Holistic Integrative Oncology 2023年第1期2卷 433-446页

作者： Armel HervéNwabo Kamdje richard tagne simo Hetvet Paulain Fogang Dongmo Amel Renaud Bidias Palmer Masumbe Netongo Department of Physiological Sciences and Biochemistry Faculty of Medicine and Biomedical SciencesUniversity of GarouaP.O.Box 317GarouaCameroon Department of Biomedical Sciences University of NgaoundereP.O.Box 454NgaoundereCameroon Molecular Diagnostics Research Group Biotechnology Centre-University of Yaounde IYaoundéCameroon Department of Biochemistry Faculty of ScienceUniversity of Yaounde IYaoundéCameroon School of Science Navajo Technical UniversityCrownpointNMUSA Department of Microbiology The University of YaoundéIYaoundéCameroon

Microbial-induced inflammation serves a dual role,safeguarding against pathogens but also posing a risk of secondary harm to host tissues,potentially leading to fibrosis and *** traditional pathogens,gut microbiota,the mutualistic microorganisms inhabiting the gastrointestinal tract,crucial for digestion,immunity,and cancer prevention,can incite inflammation-related cancer when their microenvironment undergoes *** research reveals that microbiota members like Escherichia coli and other genotoxic pathogens can induce DNA damage across various cell *** infections involving microbiota members like Helicobacter spp.,linked to liver,colorectal,cervical cancers,and lymphoma,can activate carcinogenic *** responses,driven by immune cells releasing inflammatory molecules like macrophage migration inhibitory factor(MMIF),superoxide peroxynitrite,pro-inflammatory cytokines,adhesion molecules,and growth factors,contribute to DNA damage and oncogenic mutations *** microenvironment further supports neoplastic cell survival and *** summary discusses the involvement of inflammatory pathways in microbial-triggered carcinogenesis and the potential role of microbiota modulation in cancer prevention.

关键词： Signaling pathways Microbe Infection Inflammation Carcinogenesis Cancer

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Breast Cancer and Its Screening Awareness in the North Region of Cameroon

引用

Journal of Cancer Therapy 2021年第7期12卷 424-436页

作者： Erika Myriam Baiguerel richard simo tagne Armel Hervé Kamdje Nwabo Charlette Nangue Ahmadou Mohamadou Paul Faustin Seke Etet Phelix Bruno Telefo Department of Biomedical Sciences Faculty of Science University of Ngaoundere Ngaoundere Cameroon Department of Physiological Sciences and Biochemistry Faculty of Medicine and Biomedical Sciences University of Ngaoundere Garoua Cameroon Anatomo-Cytopathology Laboratory University Hospital Center of Yaounde Yaounde Cameroon Department of Biochemistry University of Dschang Dschang Cameroon

Due to the late diagnosis, resulting partly from the absence of national screening programs, breast cancer has become a real public health problem in Cameroon, particularly in rural areas. This work aimed to assess breast cancer awareness in the North Region of Cameroon. Participants were selected randomly in six health centers surrounding rural areas of Garoua, North Region of Cameroon, and administered a questionnaire aimed at assessing their awareness about breast cancer warning signs and screening methods. Out of 475 women (including 37 medical personnel) interviewed, 23.3% had misconceptions and myth-based ideas on the origin of the disease. Employed women were more aware of breast cancer, its risk factors and symptoms as compared to other groups (p < 0.0001) for most of the risk factors and symptoms. Participants with higher education and employed women were also more aware of breast cancer screening, including breast self-examination mammography, and breast ultrasound (p < 0.0001 vs. other groups). Breast cancer screening and breast self-examination were mostly performed by women with higher education and employed women (p < 0.0001 compared to other groups). Ignorance was the main reason preventing women from performing breast self-examination and the high cost prevented going for mammography. Our study highlights the need to raise awareness among

关键词： Breast Cancer Awareness Screening North Region of Cameroon

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

New targeted therapies for breast cancer: A focus on tumor microenvironmental signals and chemoresistant breast cancers

引用

World Journal of Clinical Cases 2014年第12期2卷 769-786页

作者： Armel Hervé Nwabo Kamdje Paul Faustin Seke Etet Lorella Vecchio richard simo tagne Jeremie Mbo Amvene Jean-Marc Muller Mauro Krampera Kiven Erique Lukong Department of Biomedical Sciences Faculty of Sciences University of NgaoundéréPO Box 454 NgaoundéréCameroon Department of Basic Health Sciences College of Applied Medical Sciences Qassim UniversityBuraydah 52571 Saudi Arabia Université de Poitiers Faculté des Sciences P?le Biologie-Santé Bat B36 1 rue Georges Bonnet-BP633 86022 Poitiers cedex France Department of Medicine Section of Hematology Stem Cell Research Laboratory University of Verona 37129 Verona Italy Department of Biochemistry College of Medicine University of Saskatchewan Saskatoon S7N 5E5 Canada

Breast cancer is the most frequent female malignancy worldwide. Current strategies in breast cancer therapy,including classical chemotherapy, hormone therapy, and targeted therapies, are usually associated with chemoresistance and serious adverse effects. Advances in our understanding of changes affecting the interactome in advanced and chemoresistant breast tumors have provided novel therapeutic targets, including, cyclin dependent kinases, mammalian target of rapamycin,Notch, Wnt and Shh. Inhibitors of these molecules recently entered clinical trials in mono- and combination therapy in metastatic and chemo-resistant breast cancers. Anticancer epigenetic drugs, mainly histone deacetylase inhibitors and DNA methyltransferase inhibitors, also entered clinical trials. Because of the complexity and heterogeneity of breast cancer, the future in therapy lies in the application of individualized tailored regimens. Emerging therapeutic targets and the implications for personalized-based therapy development in breast cancer are herein discussed.

关键词： Breast cancer Microenvironment Signaling molecule Targeted therapy Chemoresistance

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Prostate Cancer Characteristics and Associated Factors in Northern Cameroon

引用

Journal of Cancer Therapy 2021年第5期12卷 289-301页

作者： tagne simo richard Mohamadou Ahmadou Nwabo Kamdje Armel Hervé Seke Etet Paul Faustin Baiguerel Erika Myriam Danki Sillong Franklin Telefo Phelix Bruno Department of Biomedical Sciences Faculty of Science University of Ngaoundere Ngaoundere Cameroon Department of Physiological Sciences and Biochemistry FMBS Garoua University of Ngaoundere Ngaoundere Cameroon Islamic Clinic of Adamawa Ngaoundere Cameroon Department of Biochemistry University of Dschang Dschang Cameroon

Background: The incidence of prostate cancer in Cameroon has been increasing in an alarming rate. The aim of this study is to characterize the form of prostate cancer and associated factors in patients from Cameroon Northern Regions. Methods: All patients with positive prostate biopsy (cancer+) from June 2018 to November 2019 were studied (n = 177). The followings were retrieved: digital rectal examination, standard clinical examinations, laboratory data such as serum prostate-specific antigen (PSA) level, and the Gleason score. Patients self-administered a questionnaire assessing prostate cancer’s risk factors. Results: Patients were mainly from the Far North region (36.72%), and were either farmers or breeders (48.01%). Only prostate adenocarcinoma was present, with predominance of aggressive forms (Gleason score ≥ 7). Significant relationships were observed between Gleason score and 1) patients’ age (P = 0.006), 2) history of urinary tract infections (P = 0.015) and of exposure to agricultural products (P = 0.049), 3) clinical signs (nycturia, pollakiuria, poor acute urine retention, and dysuria) (P = 0.019), 4) prostate weight, and

关键词： Cancer Prostate Gleason Score Risk Factors Africa

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Modeling Study for Moisture Diffusivities and Moisture Transfer Coefficients in Drying of “Violet de Galmi” Onion Drying

引用

Advances in Chemical Engineering and Science 2022年第3期12卷 172-196页

作者： Aboubakar Compaoré Samuel Ouoba Kondia Honoré Ouoba Merlin simo-tagne Yann Rogaume Clément Ahouannou Alfa Oumar Dissa Antoine Béré Jean Koulidiati Laboratoire de Physique et de Chimie de l’Environnement (LPCE) Ecole Doctorale Sciences et Technologie (ED-ST) Université Jo-seph KI-ZERBO Ouagadougou Burkina Faso Laboratoire d’Etudes et de Recherche sur le Matériau Bois (LERMAB) Nancy-Université ENSTIB Epinal France Laboratoire des matériaux et Environnement (LA.M.E.) Ecole Doctorale Sciences et Technologie (ED-ST) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratory of Energetics and AppliedMechanics (LEMA) Polytechnic College of Abomey-Calavi Abomey-Calavi University Coto-nou Bénin

In the present work, the mass transfer characteristics, namely moisture diffusivity and moisture transfer coefficient of “Violet de Galmi” variety of onions were evaluated using the analytical model. Onions were dried in a single layer at different temperatures (40℃, 50℃, 60℃, and 70℃) and for a relative humidity of drying air of 20%. The results showed a reasonably good agreement between the values predicted by the correlation and the experimental observations. This model computed the Biot number, effective moisture diffusivity, and mass transfer coefficient. Effective diffusion coefficient values are obtained between 0.2578 × 10-9 m2·s-1 and 0.5460 × 10-9 m2·s-1. Mass transfer coefficients of “Violet de Galmi” onion drying vary between 3.37 × 10-7 m·s-1 and 13.38 × 10-7 m·s-1. Numbers of mass transfer Biot are found between 0.9797 and 2.9397. The activation energy Ea is 31.73 kJ·mol-1.

关键词： “Violet de Galmi” Onion Diffusion Coefficient Drying Coefficient Lag Factor

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Diagnostic Reference Levels of Adults CT-Scan Imaging in Cameroon: A Pilot Study of Four Commonest CT-Protocols in Five Radiology Departments

引用

Open Journal of Medical Imaging 2017年第1期7卷 1-8页

作者： Boniface Moifo Jean Roger Moulion Tapouh Mathurin Neossi Guena Thierry Ndzana Ndah richard Ndi Samba Augustin simo Department of Radiology and Radiation Oncology Faculty of Medicine and Biomedical Sciences The University of Yaoundé 1 Yaounde Cameroon Radiology Department Yaounde Gynaeco-Obstetric and Pediatric Hospital Yaounde Cameroon Radiology Department Yaounde University Teaching Hospital Yaounde Cameroon Department of Biomedical Sciences University of Ngaoundere Ngaoundere Cameroon National Radiation Protection Agency (ANRP) Yaounde Cameroon

CT-scan is the most irradiating tool in diagnostic radiology. For 5% - 10% of diagnostic X-ray procedures, it is responsible for 34% of irradiation according to UNSCEAR. Patients radiation protection must therefore be increased during CT-scan procedures. This requires the rigorous application of optimization principle which imposes to have “diagnostic reference levels”. Objective: The aim of this study was to determine the diagnostic reference levels (DRLs) of the four most frequent CT-scans examinations of adults in Cameroon. Material and Method: It was a cross-sectional pilot study carried out from April to September 2015 in five health facilities using CT-scan in Cameroon. The studied variables were: patients age and sex, type of CT-scan examination (cerebral, chest, abdomino-pelvic, lumbar spine), Used of IV contrast (IV﹣/ IV+), acquisition length, time of tube rotation, voltage (kV), mAs, pitch, thickness of slices, CTDIvol and DLP. For each type of examination, at least 30 patients were included per center, consecutively on the randomly predetermined days. The DRL for each type of examination was defined as the 75th percentile of its PDL and CTDIvol. Results: Of the 696 examinations, 41.2% were cerebral, 26.9% abdomino-pelvic, 17.7% lumbar spine and 14.2% chest. The mean age of patients was 52 ± 15 years [20 - 90 years], 58.9% were 50 years and older. The sex-ratio was 1.26 (55.9% males). The CT machines were 4, 8 and 16 multidetectors. The 75th percentile of DLP or DRLs [standard deviation] was: [1150 ± 278 mGy·cm], [770 ± 477 mGy·cm], [720 ± 170 mGy·cm] and [715 ± 187 mGy·cm] respectively for cerebral, lumbar spine, abdominopelvic and chest CT-scans. Taking in consideration the number of detectors, the 75th percentile of the Dose-Length product decreased with the increase number of detectors for cerebral examinations but was the highest with 16 MDCT for the abdominopelvic, lumbar spine and chest CT-scans. For the chest and lumbar spine examinations, there wa

关键词： Optimization Diagnostic Reference Levels Dose Length Product CT Dose Index Patient Dose Radiation Protection Best Practices

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：