scholarly journals Role of 24- and 28-hydroxylated intermediates in the metabolism of β-sitosterol in the insect Tenebrio molitor

1979 ◽  
Vol 183 (3) ◽  
pp. 495-499 ◽  
Author(s):  
F Nicotra ◽  
F Ronchetti ◽  
G Russo ◽  
L Toma
Keyword(s):  
Double Bond ◽  
Tenebrio Molitor ◽  
Mechanism Of Formation ◽  
Tenebrio Molitor Larvae

1. [28-3H]Stigmast-5-ene-3 beta, 28-diol and [23,23,25-3H]stigmast-5-ene-3 beta, 24-diol were synthesized. 2. Each of the samples was mixed with beta-[4-14C]sitosterol and administered to Tenebrio molitor larvae. 3. The former compound is not utilized by the insect; the latter, although metabolized to 24(28)-ethylidene sterols and cholesterol, is not a beta-sitosterol metabolite. 4. The above results are discussed in relation to the mechanism of formation of the 24(28)-double bond in beta-sitosterol metabolism in T. molitor.

scholarly journals The Role of the Thermal Hysteresis Factor in Tenebrio Molitor Larvae

1978 ◽  
Vol 74 (1) ◽  
pp. 37-45 ◽  
Author(s):  
JEAN L. PATTERSON ◽  
JOHN G. DUMAN
Keyword(s):  
Relative Humidity ◽  
Low Temperatures ◽  
Thermal Hysteresis ◽  
Tenebrio Molitor ◽  
Short Photoperiod ◽  
Melting Points ◽  
Lethal Temperatures ◽  
Tenebrio Molitor Larvae ◽  
Better Than

The haemolymph of larvae of Tenebrio molitor contains a factor which produces a thermal hysteresis (a difference between the freezing and melting points) of approximately 0.75 °C. When larvae were acclimated to low temperatures or short photoperiod the thermal hysteresis increased more than twofold. Coincident with the increase in thermal hysteresis the supercooling points and lower lethal temperatures of the larvae were depressed. Therefore, the thermal-hysteresis-producing factor seems to function as an antifreeze. The factor may also act as an adaptation to prevent desiccation. Thermal hysteresis increased almost three-fold in larvae acclimated to low relative humidity. Also, larvae with high levels of the thermal hysteresis factor survived low relative humidities much better than did larvae with lower levels.

scholarly journals A possible role of tachykinin-related peptide on an immune system activity of mealworm beetle, Tenebrio molitor L.

2021 ◽  
Vol 120 ◽  
pp. 104065
Author(s):  
A. Urbański ◽  
N. Konopińska ◽  
J. Lubawy ◽  
K. Walkowiak-Nowicka ◽  
P. Marciniak ◽  
...  
Keyword(s):  
Immune System ◽  
Tenebrio Molitor ◽  
System Activity ◽  
Related Peptide ◽  
Mealworm Beetle

Effect of Tenebrio molitor larvae meal on the antioxidant status and stress response pathways in tissues of growing pigs

2021 ◽  
pp. 1-14
Author(s):  
Robert Ringseis ◽  
Lukas Peter ◽  
Denise K. Gessner ◽  
Sandra Meyer ◽  
Erika Most ◽  
...  
Keyword(s):  
Stress Response ◽  
Antioxidant Status ◽  
Tenebrio Molitor ◽  
Growing Pigs ◽  
Tenebrio Molitor Larvae

Porcine glutathione transferase Alpha 2-2 is a human GST A3-3 analogue that catalyses steroid double-bond isomerization

2010 ◽  
Vol 431 (1) ◽  
pp. 159-167 ◽  
Author(s):  
Natalia Fedulova ◽  
Françoise Raffalli-Mathieu ◽  
Bengt Mannervik
Keyword(s):  
Double Bond ◽  
Glutathione Transferase ◽  
Biological Species ◽  
Glutathione Transferases ◽  
Special Role ◽  
Primary Role ◽  
The Novel ◽  
Protective Function ◽  
Isomerase Activity

A primary role of GSTs (glutathione transferases) is detoxication of electrophilic compounds. In addition to this protective function, hGST (human GST) A3-3, a member of the Alpha class of soluble GSTs, has prominent steroid double-bond isomerase activity. The isomerase reaction is an obligatory step in the biosynthesis of steroid hormones, indicating a special role of hGST A3-3 in steroidogenic tissues. An analogous GST with high steroid isomerase activity has so far not been found in any other biological species. In the present study, we characterized a Sus scrofa (pig) enzyme, pGST A2-2, displaying high steroid isomerase activity. High levels of pGST A2-2 expression were found in ovary, testis and liver. In its functional properties, other than steroid isomerization, pGST A2-2 was most similar to hGST A3-3. The properties of the novel porcine enzyme lend support to the notion that particular GSTs play an important role in steroidogenesis.

Compensation for Temperature in the Digestive Metabolism of Tenebrio molitor Larvae

1964 ◽  
Vol 37 (1) ◽  
pp. 90-95 ◽  
Author(s):  
Shalom W. Applebaum ◽  
Miroslava Janković ◽  
Jelena Grozdanović ◽  
Dragoslav Marinković
Keyword(s):  
Tenebrio Molitor ◽  
Tenebrio Molitor Larvae

scholarly journals Correction: Involvement of phenoloxidase in browning during grinding of Tenebrio molitor larvae

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0192015
Author(s):  
Renske H. Janssen ◽  
Catriona M. M. Lakemond ◽  
Vincenzo Fogliano ◽  
Giovanni Renzone ◽  
Andrea Scaloni ◽  
...  
Keyword(s):  
Tenebrio Molitor ◽  
Tenebrio Molitor Larvae

Feeding of cuticles from Tenebrio molitor larvae modulates the gut microbiota and attenuates hepatic steatosis in obese Zucker rats

2022 ◽  
Author(s):  
Armaghan Saeb ◽  
Sarah Maria Grundmann ◽  
Denise K Gessner ◽  
Sven Schuchardt ◽  
Erika Most ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Hepatic Steatosis ◽  
Mass Rearing ◽  
Tenebrio Molitor ◽  
Zucker Rats ◽  
Insect Larvae ◽  
Food And Feed ◽  
Obese Zucker Rats ◽  
Tenebrio Molitor Larvae

an alternative and sustainable source of food and feed. A byproduct from mass-rearing of insect larvae are the shed cuticles - the most external components of insects which are a...

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