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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

Medicine --- Oncology --- Immune Evasion --- therapy resistance --- Epithelial-to-mesenchymal transition (EMT) --- Immunotherapy --- Tumor microenvironment (TME) --- heterogeneity --- cancer plasticity --- immune checkpoint inhibitors --- Immune Evasion --- therapy resistance --- Epithelial-to-mesenchymal transition (EMT) --- Immunotherapy --- Tumor microenvironment (TME) --- heterogeneity --- cancer plasticity --- immune checkpoint inhibitors

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

Medicine --- Oncology --- Immune Evasion --- therapy resistance --- Epithelial-to-mesenchymal transition (EMT) --- Immunotherapy --- Tumor microenvironment (TME) --- heterogeneity --- cancer plasticity --- immune checkpoint inhibitors

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Immunotherapy has become a viable treatment modality for a variety of cancers (and referred to as Science Magazine’s “Breakthrough of the Year” in 2013, as well as ASCO’s “Advance of the Year” in both 2016 and 2017). This Special Issue is focused on the relevance of immunobiology in brain tumors, touching on elements of immune suppression, immune stimulation, and the immune microenvironment, with culminations in translational immunotherapy.

Medicine --- vaccine therapy --- oncoantigen --- tumor associate antigen --- tumor angiogenesis --- high-grade glioma --- pituitary neuroendocrine tumors --- VEGF --- Treg --- TAM --- PD-1 --- PD-L1 --- tumor microenvironment (TME) --- glioblastoma multiforme (GBM) --- GBM-associated macrophages (GAMs) --- exosomes --- oncomiR-21 --- STAT3 inhibitor --- glioma --- diffusion tensor imaging --- generalized q-ball imaging --- treatment-related effects --- multiple resections --- adrenal insufficiency --- Addison’s disease --- bevacizumab --- cerebral radiation necrosis --- craniopharyngioma --- inflammation --- checkpoint inhibitors --- Interleukin-6 --- vaccine therapy --- oncoantigen --- tumor associate antigen --- tumor angiogenesis --- high-grade glioma --- pituitary neuroendocrine tumors --- VEGF --- Treg --- TAM --- PD-1 --- PD-L1 --- tumor microenvironment (TME) --- glioblastoma multiforme (GBM) --- GBM-associated macrophages (GAMs) --- exosomes --- oncomiR-21 --- STAT3 inhibitor --- glioma --- diffusion tensor imaging --- generalized q-ball imaging --- treatment-related effects --- multiple resections --- adrenal insufficiency --- Addison’s disease --- bevacizumab --- cerebral radiation necrosis --- craniopharyngioma --- inflammation --- checkpoint inhibitors --- Interleukin-6

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The Hedgehog signaling pathway is an evolutionarily conserved pathway that governs complex developmental processes, including stem cell maintenance, proliferation, differentiation, and patterning. Several recent studies have shown that the aberrant activation of Hedgehog signaling is associated with neoplastic transformation, cancer cell proliferation, metastasis, multiple cancers’ drug resistance, and survival rates. This book focuses on several aspects of Hedgehog signaling in organogenesis and the tumor microenvironment, and presents reviews and original papers on recent efforts in the field of Hedgehog signaling.

Cyp26 enzymes --- congenital anomalies --- CRE/LoxP --- hedgehog signaling --- mouse models --- retinoic acid --- smoothened --- sonic hedgehog --- sonic hedgehog (SHH) --- oral squamous cell carcinoma (OSCC) --- tumor microenvironment (TME) --- tumor-associated macrophages (TAMs) --- cancer-associated fibroblasts (CAFs) --- tumor-associated angiogenesis --- hedgehog --- growth plate --- endochondral ossification --- chondrocyte --- osteoblast --- bone disease --- TMJ --- synovial joint --- articular disc --- Ihh --- PTHrP --- osteoarthritis --- epithelial–mesenchymal interaction (EMI) --- prostate cancer --- external genitalia --- androgen --- basement membrane --- bone morphogenetic protein --- stem cell --- animal experiment --- fracture healing --- cancer stem cells --- hypospadias --- urethra --- penis --- bone --- hedgehog signalling --- tooth development --- epithelial and mesenchymal interaction --- Gli1 --- mesenchymal stem cell --- lineage tracing analysis --- stem cell marker --- n/a --- epithelial-mesenchymal interaction (EMI)

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Nature continuously produces biologically useful molecules and provides humankind with life-saving drugs or therapies. Natural products (NPs) offer a vast, unique and fascinating chemical diversity and these molecules have evolved for optimal interactions with biological macromolecules. Moreover, natural products feature pharmacologically active pharmacophores which are pharmaceutically validated starting points for the development of new lead compounds. Over half of all approved (from 1981 to 2014) small-molecule drugs derived from NPs, including unaltered NPs, NPs synthetic derivatives and synthetic natural mimics, originated from a NPs pharmacophore or template. According to the FDA, NPs and their derivatives represent over one-third of all FDA-approved new drugs, in particular for anticancer/antibiotic lead compounds, which are remarkably enriched with NPs.

Research & information: general --- Chemistry --- Organic chemistry --- multi-component reaction --- fusidic acid --- TEMPO-conjugate --- electron paramagnetic resonance (EPR) spectroscopy --- caspase-3 --- incomptine A --- sesquiterpene lactone --- Decachaeta incompta --- cytotoxic activity --- iTRAQ --- apoptosis --- ROS production --- violacein --- hepatocellular carcinoma --- proliferation --- stemness --- natural products --- tumor microenvironment (TME) --- lung cancer --- phytochemicals --- botanical agents --- steroidal alkaloids --- solanidane alkaloids --- demissidine --- solanidine --- flavonoids --- coronavirus --- SARS-CoV-2 --- SARS-CoV --- MERS-CoV --- anticancer activity --- apoptosis resistance --- ophiobolin A --- polygodial --- Wittig reaction --- melanoma --- tumor heterogeneity --- pregnancy --- anti-tumor peptides --- in vitro model --- medicinal herbs --- cancer treatment --- cancer stem cells --- drug resistance --- metastasis --- RCE-4 --- PCD --- ATG 4B --- the Bcl-2-Beclin 1 complex --- Sparticola junci --- structure elucidation --- ECD-TDDFT --- COX inhibitory --- molecular docking --- antiproliferative --- cytotoxic --- Sepedonium ampullosporum --- peptaibols --- ampullosporin --- glutamic acid methyl ester --- solid-phase peptide synthesis --- antifungal --- anticancer --- target identification --- kaempferol --- docking --- DARTS --- Src --- breast cancer --- butein --- frondoside-A --- STAT3 --- angiogenesis --- invasion --- viability --- tumor growth --- marine fungi --- Cosmospora sp. --- soudanone --- Magnaporthe oryzae --- co-culture --- phytopathogen --- molecular networking --- metabolomics --- bispecific antibody --- Trypsiligase --- click chemistry --- biorthogonal chemistry --- antibody engineering --- multi-component reaction --- fusidic acid --- TEMPO-conjugate --- electron paramagnetic resonance (EPR) spectroscopy --- caspase-3 --- incomptine A --- sesquiterpene lactone --- Decachaeta incompta --- cytotoxic activity --- iTRAQ --- apoptosis --- ROS production --- violacein --- hepatocellular carcinoma --- proliferation --- stemness --- natural products --- tumor microenvironment (TME) --- lung cancer --- phytochemicals --- botanical agents --- steroidal alkaloids --- solanidane alkaloids --- demissidine --- solanidine --- flavonoids --- coronavirus --- SARS-CoV-2 --- SARS-CoV --- MERS-CoV --- anticancer activity --- apoptosis resistance --- ophiobolin A --- polygodial --- Wittig reaction --- melanoma --- tumor heterogeneity --- pregnancy --- anti-tumor peptides --- in vitro model --- medicinal herbs --- cancer treatment --- cancer stem cells --- drug resistance --- metastasis --- RCE-4 --- PCD --- ATG 4B --- the Bcl-2-Beclin 1 complex --- Sparticola junci --- structure elucidation --- ECD-TDDFT --- COX inhibitory --- molecular docking --- antiproliferative --- cytotoxic --- Sepedonium ampullosporum --- peptaibols --- ampullosporin --- glutamic acid methyl ester --- solid-phase peptide synthesis --- antifungal --- anticancer --- target identification --- kaempferol --- docking --- DARTS --- Src --- breast cancer --- butein --- frondoside-A --- STAT3 --- angiogenesis --- invasion --- viability --- tumor growth --- marine fungi --- Cosmospora sp. --- soudanone --- Magnaporthe oryzae --- co-culture --- phytopathogen --- molecular networking --- metabolomics --- bispecific antibody --- Trypsiligase --- click chemistry --- biorthogonal chemistry --- antibody engineering