The Qualitative and Quantitative Determination of Juvenile Hormones by Mass Spectrometry

Mauchamp, Bernard; Zander, M.; Wolff, R.

doi:10.1007/978-3-642-69922-1_35

Proceedings in Life Sciences

1984

DOI: 10.1007/978-3-642-69922-1_35

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The Qualitative and Quantitative Determination of Juvenile Hormones by Mass Spectrometry

Bernard Mauchamp

M. Zander

R. Wolff³

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1986

1999

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Cited by 3 publications

References 11 publications

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Fenoxycarb, a potent contaminant of the silkworm,Bombyx mori L., does not influence its juvenile hormone titer

Monconduit¹,

Mauchamp²

1999

Arch. Insect Biochem. Physiol.

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Fenoxycarb (FC) effects were studied on juvenile hormone (JH) titers and JH‐esterase activities in the silkworm, B. Mori. In the literature, FC was observed to induce high JH titers but also to act without corpora allata (CA). These contradictory results did not permit us to conclude whether FC was a potent JH mimic or it was acting through the enhancement of JH titers in the hemolymph. Analysis of hemolymph JH‐esterase activities during the last larval instar reveals that FC was not a JH‐esterase inhibitor. Considering JHs, only JH II was detected in the European hybrid 200×300. Furthermore, JH titer was exactly identical in control and FC‐treated larvae, i.e., it dropped during the first 2 days of the last larval instar and became undetectable after day 2. This result is important since it contradicts the generally admitted concept that FC was acting by increasing the titer of JH. On the contrary, it was found that, despite its non‐terpenoid chemical structure, FC might be a JH mimic. In addition, FC suspected contamination of mulberry leaves was analyzed from a physiological viewpoint. We observed that "contaminated" mulberry leaves‐fed larvae became permanent larvae through the inhibition of their prothoracic glands (PG) activity and without any modification of their JH titers, i.e., exactly as for FC‐treated larvae. This last point adds information concerning the suspected implication of FC in the induction of the non‐spinning syndrome. Arch. Insect Biochem. Physiol. 40:141–149, 1999. © 1999 Wiley‐Liss, Inc.

show abstract

Fenoxycarb, a potent contaminant of the silkworm,Bombyx mori L., does not influence its juvenile hormone titer

Monconduit¹,

Mauchamp²

1999

Arch. Insect Biochem. Physiol.

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Identification of juvenile hormone III in the hemolymph of Blattella germanica adult females by gas chromatography‐mass spectrometry

Camps

Casas

Sanchez

et al. 1987

Arch Insect Biochem Physiol

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Juvenile hormone III was identified in purified hemolymph extracts of adult females of the cockroach Blatella germanica by gas chromatography‐mass spectrometry with chemical ionization and selected ion monitoring. Under these conditions, juvenile hormones I and II were not detected within the sensitivity ranges of this analytical method. For quantification purposes a 5,5‐bisdeuterated analog of juvenile hormone III was synthesized and used as an internal standard. In general, juvenile hormone III titers obtained correlated with data on oocyte growth and with hormone titers found from in vitro corpora allata incubations along the first gonotrophic cycle.

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Physico-chemical (GC-MS) measurements of juvenile hormone III titres during embryogenesis ofLocusta migratoria

Temin¹,

Zander

Roussel³

1986

International Journal of Invertebrate Reproduction and Developm

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The Qualitative and Quantitative Determination of Juvenile Hormones by Mass Spectrometry

Cited by 3 publications

References 11 publications

Fenoxycarb, a potent contaminant of the silkworm,Bombyx mori L., does not influence its juvenile hormone titer

Fenoxycarb, a potent contaminant of the silkworm,Bombyx mori L., does not influence its juvenile hormone titer

Identification of juvenile hormone III in the hemolymph of Blattella germanica adult females by gas chromatography‐mass spectrometry

Physico-chemical (GC-MS) measurements of juvenile hormone III titres during embryogenesis ofLocusta migratoria

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