Screening for chemicals which exert effects via common toxicity pathways and subsequently conducting targeted short-term tests may generate new information about the toxicity of chemicals without performing extensive substance-by-substance animal experiments.
Herein, we compared the membrane activities of six basic peptides with different size, charge density and amphipaticity: Two cell-penetrating peptides (penetratin and R9), three amphipathic peptides and the neuromodulator substance P. Experiments of X ray diffraction, video-microscopy of giant vesicles, fluorescence spectroscopy, turbidimetry and calcein leakage from large vesicles are reported.
In exposure response studies for a substance, biological experiments are performed in a range of experimental conditions.
99mTc is a controlled radioactive substance; therefore, experiments were performed with appropriate risk assessment in specialist facilities at a hospital which routinely produces and handles the material for use in clinical nuclear medicine.
For substances or experiments, equal objects have equal 'name' attributes.
First of all, common marmosets are smaller and reach their adult age earlier than macaques, which saves capacity in animal facilities and reduces the amounts of tested substances in experiments.
This mouse line will be useful for assessing proliferation in models of cardiac regeneration, for the differentiation between atrial and ventricular CMs during embryonic development, identification of CMs in screening assays for proliferation-inducing substances, transplantation experiments, and for the analysis of plasticity of adult CMs in future studies.
Some risked death from the substances they experimented with.
"People using these substances are experimenting on themselves without knowing what the long-term effects could be".
"People using these substances are experimenting on themselves, leaving them at risk of overdose and without knowing what the long-term effects could be".
