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Articles 31 - 33 of 33
Full-Text Articles in Life Sciences
Embryonic Staging Table For A Direct- Developing Salamander, Plethodon Cinereus (Plethodontidae), Ryan Kerney
Embryonic Staging Table For A Direct- Developing Salamander, Plethodon Cinereus (Plethodontidae), Ryan Kerney
Ryan Kerney
This work presents a refined staging table for the direct-developing red-backed salamander Plethodon cinereus, which is based on the incom- plete staging system of James Norman Dent (J Morphol 1942; 71:577– 601). This common species from eastern North America is a member of the species-rich lungless salamander family Plethodontidae. The stag- ing table presented here covers several stages omitted by Dent and reveals novel developmental features of P. cinereus embryos. These include putative Leydig cells and open gill clefts, which are found in lar- vae of metamorphosing species but were previously reported as absent in direct-developing Plethodon. Other features found …
Β3-Adrenergic Agonists Mimic Eustress Response And Reduce Leptin-Mediated Proliferation In A Gbm Cell Line, Johnathan E. Lawrence, Nicholas J. Cook, Richard A. Rovin, Robert J. Winn
Β3-Adrenergic Agonists Mimic Eustress Response And Reduce Leptin-Mediated Proliferation In A Gbm Cell Line, Johnathan E. Lawrence, Nicholas J. Cook, Richard A. Rovin, Robert J. Winn
Johnathan Lawrence
A great deal of mental stress, depression, and anxiety often overwhelm cancer patients; those diagnosed with glioblastoma multiforme (GBM) are no exception. Different types of stress invariably impact what has been termed “the brain-adipocyte BDNF/leptin axis” (Dr. Cao and colleagues of the Comprehensive Cancer Center at The Ohio State University). For example, eustress (good stress) and distress (bad stress) both lead to increased sympathetic activity and adrenal gland stimulation, yet eustress reduces leptin levels and attenuates tumor growth while distress increases leptin levels and augments tumor growth. Complicating matters in GBM is that leptin and its receptor are expressed at …
Glioblastoma Derived Exosomes Contribute To Tumor Immune Evasion, Keith Z. Sabin, Danny Lebert, Vanessa Thibado, Richard A. Rovin, Johnathan E. Lawrence, Robert J. Winn
Glioblastoma Derived Exosomes Contribute To Tumor Immune Evasion, Keith Z. Sabin, Danny Lebert, Vanessa Thibado, Richard A. Rovin, Johnathan E. Lawrence, Robert J. Winn
Johnathan Lawrence
Glioblastoma multiforme (GBM) is the most frequent and lethal primary brain tumor in adults. Despite intense biomedical research, the median survival after diagnosis is 15 months. One factor contributing to this poor prognosis is the immune protection afforded by the tumor microenvironment. Tumors have a diverse repertoire of immune-evasive techniques. One method of evasion not well explored is the release of tumor-derived exosomes. Exosomes are tiny membrane-bound vesicles of endocytic origin that contain viable mRNA and functional proteins that can affect the physiology of recipient cells. Exosome release has been reported for numerous cancer types, including GBM. Exosomes from colon …