Lipophorin and apolipophorin-III in solitary and gregarious phases of Schistocerca gregaria

Effect of phase status on responses to AKHI in the desert locust, Schistocerca gregaria gregaria

“…gregaria. However, in an earlier study, we observed that the conversion of HDLp to LDLp in response to AKH injection was less efficient in solitary compared to gregarious locusts (Ogoyi et al, 1995).…”

Juvenile hormone and locust phase

“…Juvenile hormone III and the JH analogs fenoxycarb and BASF 228743 inhibit fat body development and reduce the adipokinetic response when topically applied to gregarious females, implying that the treated females have been solitarized, and that migratory flight is precluded (Schneider et al, 1995). Analysis of fat body triacylglycerol content and of low-density lipophorin induction by AKH in JH-analog-treated swarms, as has been done in laboratory experiments (Chino et al, 1992;Ogoyi et al, 1995), might assist in evaluating the potential of methoprene-treated adults to migrate. It is not certain that once accumulated in gregarious field populations, such reserves decline after exposure to JH or analogs, or that responsiveness to AKH is reduced.…”

“…In contrast, both phases of adult male S. gregaria respond to AKH-I and convert high-density lipophorin to low-density lipophorin, thus increasing the load of lipid transported. The efficiency of this conversion is higher in gregarious males, presumably related to their ability to sustain long-distance flight (Ogoyi et al, 1995).…”

Differentially-expressed glycoproteins in Locusta migratoria hemolymph infected with Metarhizium anisopliae

“…ApoLp-I and apoLp-II, along with a mixture of lipids, constitute the basic structure of the major insect hemolymph lipophorin. Insect lipophorin plays important roles in transporting dietary lipids from the gut to the storage depot, the fat body, while also distributing stored or biosynthesized lipids to peripheral tissues (Ogoyi et al, 1995;Rodenburg and Van der Horst, 2005). Studies of ApoLp-III, an inducibly-expressed protein, have largely focused on its role in lipid transport during insect flight, especially its role in activating the immune response (Wiesner et al, 1997;Niere et al, 1999;Mullen and Goldsworthy, 2003;Mullen et al, 2004;Kim et al, 2004b).…”