Reporter mouse

Kawamoto, S., Niwa, H., Tashiro, F., Sano, S., Kondoh, G., Takeda, J. et al. (2000) A novel reporter mouse strain that expresses enhanced green fluorescent protein upon Cre-mediated recombination. FEBS Lett., 470, 263-268. 

Key words Reporter mouse, pharmacodynamics, pharmacokinetics, bioluminescence imaging,... 

A novel peroxisome proliferator-activated receptor responsive element-luciferase reporter mouse reveals gender specificity of peroxisome proliferator-activated receptor activity in liver. Mol Endocrinol. 21(2), 388-400. 

This section will focus on the available chemical data concerning only toxic substances produced by Ostreopsis sp., shown to possess palytoxin characteristics. For reasons of convenience, toxins will be presented according to producing species. Palytoxin-like compounds have been reported for O. siamensis, O. ovata, and O. mascarenensis. The neurotoxins ostreotoxin-1 and -3 produced by O. lenticularis have not been to date characterised by use of analytical methods as palytoxin analogues, despite their reported mouse lethality and possible connection to ciguatera (Tindall et al. 1990 Mercado et al. 1994 Meunier et al. 1997). With regard to the last of the toxic species, the oidy... 

Ciana, P., Bisemi, A., Tatangelo, L., Tiveron, C., Sciarroni, A. R, Ottobrini, L., and Maggi, A. (2007) A novel peroxisome prohferator-activated receptor responsive element-luciferase reporter mouse reveals gender specificity of peroxisome prohferator-activated receptor activity in fiver. Mol. Endocrinol. 21, 388 400. 

GENSAT developed a Fezfl reporter mouse called the (Zfp312-EGFP)C061Gsat/Mmnc mouse line that we hereafter refer to as the Fezfl-GYP mouse. This reporter mouse offered an ideal opportunity to identify those projection neurons within the mature mouse cortex that expressed this master control gene and also allowed us to target them with electrophysiology. 

Combining Fluorescence-Based Immunohisto-chemistry with the Fezf2-GFP Reporter Mouse Immunohisto-chemistry of Fezf2 Downstream Effectors... 

We use standard wide-held fluorescence microscopy to detect GFP and map Fezf2 expression without any need for amplihcation. If required a primary antibody to GFP could be utilized together with a fluorescent tagged secondary antibody, but in the case of this reporter mouse, the endogenous GFP fluorescence was sufhcient. 

The time-weighted average (TWA) concentrations for 8-h exposure to bromine ttifluoride, bromine pentafluoride, chlorine ttifluoride, chlorine pentafluoride, and iodine pentafluoride have been estabHshed by ACGIH on a fluoride basis to be 2.5 mg/m. NIOSH reports (121) the foUowing inhalation toxicity levels for chlorine ttifluoride LC q monkey, 230 ppm/h LC q mouse, 178 ppm/h for chlorine pentafluoride LC q monkey, 173 ppm /h mouse, 57 ppm/h. 

The LC q (lowest possible lethal concentration) has been reported to be 23 ppm for a 30 min exposure time (mouse), 53 ppm for an exposure time of 100 min (rat, rabbit, and guinea pig), and 200 ppm for an exposure time of 10 min (monkey). No toxic effects were reported upon exposure to 1 ppm for 7 h/d over 55 days. The oral LD q (rat) of ketene is 1300 mg/kg, the low level of toxicity probably being due to the almost immediate formation of acetic acid and other acetates in the digestive tract. 

Teratogenic effects have been noted with 2- and 4-aminophenol in the hamster, but 3-aminophenol was without effect in the hamster and rat (129,130). 4-Aminophenol is known to inhibit DNA synthesis and alter DNA stmcture in human lymphoblasts (131,132) and is mutagenic in mouse micronuclei tests (133). The aminophenols have been shown to be genotoxic, as evidenced by the induction of sister chromatid exchanges (134,135), but they also exert a protective effect against DNA interaction with other noxious chemicals (136). After assessment of available data a recent report stated that the aminophenols were safe as cosmetic ingredients in their present uses and concentrations (137). 

Health and Safety Factors. Carbonyl sulfide is dangerously poisonous, more so because it is practically odorless when pure. It is lethal to rats at 2900 ppm. Studies show an LD q (rat, ip) of 22.5 mg/kg. The mechanism of toxic action appears to iavolve breakdowa to hydrogea sulfide (36). It acts principally on the central nervous system with death resulting mainly from respiratory paralysis. Little is known regarding the health effects of subacute or chronic exposure to carbonyl sulfide a 400-p.g/m max level has been suggested until more data are available (37). Carbon oxysulfide has a reported inhalation toxicity in mice LD q (mouse) = 2900 ppm (37). 

Reproductive Toxicity. No data are available that impHcate either hexavalent or trivalent chromium compounds as reproductive toxins, unless exposure is by way of injection. The observed teratogenic effects of sodium dichromate(VI), chromic acid, and chromium (HI) chloride, adininistered by injection, as measured by dose-response relationships are close to the amount that would be lethal to the embryo, a common trait of many compounds (111). Reported teratogenic studies on hamsters (117,118), the mouse (119—121), and rabbits (122) have shown increased incidence of cleft palate, no effect, and testicular degeneration, respectively. Although the exposures for these experiments were provided by injections, in the final study (122) oral, inhalation, and dermal routes were also tried, and no testicular degeneration was found by these paths. 

So far ten catalytically active caspases have been reported in mouse (caspase-1, -2, -3, -6, -7, -8, -9, -11, -12,-14) and eleven in human (caspase-1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -14) (Fig. 1). Caspases are expressed as inactive proenzymes that contain an amino-terminal prodomain of variable length followed by two domains with conserved sequences a large subunit ( 20 kDa, p20) and a small carboxy-terminal subunit ( 10 kDa, plO). Caspases can be divided according to absence (-3, -6, -7, -14) or presence (-1, -2, -8, -9, -10, -11, -12) of an extended prodomain containing protein-protein interaction motifs belonging to the death domain (DD) superfamily, in particular the death effector domains (DED) and the caspase activation and recruitment domains (CARD). 

A peroxisome proliferator-activated receptor (PPAR) binding site was identified in the murine FATP1 promoter. Several reports have shown a positive regulation of mouse FATPs by ligands that activate PPAR-a, PPAR-y, or PPAR-y/RXR heterodimers. 

---