Results 61 to 70 of about 22,021 (216)

Rapid bioconcentration of steroids in the plasma of three-spined stickleback Gasterosteus aculeatus exposed to waterborne testosterone and 17β-oestradiol [PDF]

, 2007
The relationship over time between the concentrations of two steroids, singly and in combination, in a static exposure system and in the blood of three-spined stickleback Gasterosteus aculeatus, held within the exposure system was investigated. Groups of
Matthiessen, P., Maunder, R. J., Pottinger, T. G., Sumpter, J. P.   +3 more
core   +1 more source

Effects of juvenile hormone and ecdysone on the timing of vitellogenin appearance in hemolymph of queen and worker pupae of Apis mellifera

Journal of Insect Science, 2002
The caste-specific regulation of vitellogenin synthesis in the honeybee represents a problem with many yet unresolved details. We carried out experiments to determine when levels of vitellogenin are first detected in hemolymph of female castes of Apis ...
Angel Roberto Barchuk, Marcia Maria Gentile Bitondi, Zilá Luz Paulino Simões   +2 more
doaj  

A distant TANGO1 family member promotes vitellogenin export from the ER in C. elegans

iScience
Summary: Vitellogenin is thought to share a common ancestor with human apolipoprotein B (ApoB) for systemic lipid transport. In Caenorhabditis elegans, although a general route for inter-tissue vitellogenin transport has been described, the full ...
Jimmy H. Mo, Chao Zhai, Kwangsek Jung, Yan Li, Yonghong Yan, Meng-Qiu Dong, Ho Yi Mak   +6 more
doaj   +1 more source

MARQUEURS BIOCHIMIQUES DE POLLUTION DANS LES ÉCOSYSTÈMES AQUATIQUES CONTINENTAUX. EXEMPLES D'UTILISATION ET PERSPECTIVES POUR LE GESTIONNAIRE.

Knowledge and Management of Aquatic Ecosystems, 2001
En complément des analyses chimiques, la mesure de biomarqueurs permet de disposer d'informations sur la nature et le niveau de la contamination chimique mais aussi sur la santé des organismes vivants et des populations des écosystèmes aquatiques.
FLAMMARION P., DEVAUX A., GARRIC J.
doaj   +1 more source

DmCatD, a cathepsin D-like peptidase of the hematophagous insect Dipetalogaster maxima (Hemiptera: Reduviidae): Purification, bioinformatic analyses and the significance of its interaction with lipophorin in the internalization by developing oocytes [PDF]

, 2018
DmCatD, a cathepsin D-like peptidase of the hematophagous insect Dipetalogaster maxima, is synthesized by the fat body and the ovary and functions as yolk protein precursor. Functionally, DmCatD is involved in vitellin proteolysis.
Arrese, Estela L., Canavoso, Lilian Etelvina, Carlini, Célia Regina R S, Defferrari, Marina S., Fruttero, Leonardo Luis, Leyria, Jimena, Ligabue Braun, Rodrigo, Settembrini, Beatriz Patricia, Soulages, José L.   +8 more
core   +1 more source

Egg yolk hydrolysate shows moderate impact on osteoporosis in ovariectomized rats

Journal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND This study investigated the protective effect of egg yolk hydrolysate (FC) on osteoporosis in ovariectomized (OVX) rats, a well‐established model of postmenopausal bone loss. OVX rats were fed diets supplemented with 0.2% or 1% FC for 13 weeks.
Ilekuttige Priyan Shanura Fernando, Da Shi, Zihan Wang, Michael Doschak, Jianping Wu   +4 more
wiley   +1 more source

Biosynthesis of mosquito vitellogenin.

Journal of Biological Chemistry, 1990
Vitellogenin (Vg), the hemolymph precursor to the major yolk protein in mosquitoes, is synthesized in the fat body of blood-fed females. Mosquito Vg consists of two subunits with Mr = 200,000 and 66,000. Here, we demonstrate that both the Vg subunits are first synthesized as a single precursor.
T S, Dhadialla, A S, Raikhel
openaire   +2 more sources

Regulatory mechanisms of reproduction in locusts and grasshoppers

New Plant Protection, EarlyView.
Regulatory networks composed of numerous coding and noncoding genes play crucial roles in the reproduction of locusts and grasshoppers. This review integrates mechanistic advances in reproductive regulation, highlighting environmentally adaptive pathways and providing prospective targets for eco‐friendly pesticides.
Jing He, Jiliang Wang, Xinran Wang
wiley   +1 more source

Juvenile hormone‐mediated accelerated post‐flight recovery of ovarian development in Loxostege sticticalis (Lepidoptera: Crambidae)

New Plant Protection, EarlyView.
Flight in female beet webworms (Loxostege sticticalis) promotes an increase in feeding, thereby enhancing abdominal energy reserves. Following flight, the flight muscles undergo accelerated histolysis, and the energy substances undergoing histolysis are redirected to the ovaries. These two processes collectively promote ovarian development.
Yu Gao, Yunxia Cheng, Wenyi Song, Lei Zhang, Dianjie Xie, Xingfu Jiang   +5 more
wiley   +1 more source

Identification of vitellogenin gene expression patterns in liver and ovary of Rutilus frisii Kutum exposed to genistein and β-sitosterol

‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2018
The vitellogenin gene expression can be altered by some estrogenic plant compounds like Genistein and β-sitosterol. Therefore, the measurement of vitellogenin gene expression can be used as an indicator to determine their effect on reproductive ...
D. Mohammadrezaei
doaj