Utilization of cholesterol by the cattle tick Boophilus microplus: Cholesterol economy in the engorged female adult

Cherry, Lois M.

doi:10.1016/0020-1790(76)90005-6

Cited by 10 publications

(1 citation statement)

References 18 publications

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“…Whilst gut pH has been studied (Popow and Golzowa 1933;Hughes 1950a;Akimov andBarabanova 1976a, b, 1978;Barabanova 1980a;Erban and Hubert 2010b), detailed biochemistry is missing for most acarines-although digestive enzymes (Barabanova 1972(Barabanova , 1975(Barabanova , 1976(Barabanova , 1983(Barabanova , 1984b(Barabanova , 1985, as well as body composition and intermediate metabolic pathways have been investigated especially in tetranychid plant mites (Mehrota 1961(Mehrota , 1962(Mehrota , 1963aWalling et al 1968;Kötter 1978). Some work in ticks has been carried out- Frayha et al 1970Frayha et al , 1972Cherry 1976;Maroun and Kamel 1976-more is needed. Khomyakov (1967) has looked at digestion and nutrition in soil haematophages.…”

Section: Review Of the Fieldmentioning

confidence: 99%

The gut epithelium from feeding to fasting in the predatory soil mite Pergamasus longicornis (Mesostigmata: Parasitidae): one tissue, two roles

Bowman

2019

Exp Appl Acarol

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A review of acarine gut physiology based on published narratives dispersed over the historical international literature is given. Then, in an experimental study of the free-living predatory soil mite Pergamasus longicornis (Berlese), quantitative micro-anatomical changes in the gut epithelium are critically assessed from a temporal series of histological sections during and after feeding on larval dipteran prey. An argued functional synthesis based upon comparative kinetics is offered for verification in other mesostigmatids. Midand hind-gut epithelia cell types interconvert in a rational way dependent upon the physical consequences of ingestion, absorption and egestion. The fasted transitional pseudostratified epithelium rapidly becomes first squamous on prey ingestion (by stretching), then columnar during digestion before confirmed partial disintegration (gut 'lumenation') during egestion back to a pseudo-stratified state. Exponential processes within the mid-and endodermic hind-gut exhibit 'stiff' dynamics. Cells expand rapidly (t 1∕2 = 22.9-49.5 min) and vacuolate quickly (t 1∕2 = 1.1 h). Cells shrink very slowly (t 1∕2 = 4.9 days) and devacuolate gently (t 1∕2 = 1.0-1.7 days). Egestive cellular degeneration has an initial t 1∕2 = 7.7 h. Digestion appears to be triggered by maximum gut expansion-estimated at 10 min post start of feeding. Synchrony with changes in gut lumen contents suggests common changes in physiological function over time for the cells as a whole tightly-coupled epithelium. Distinct in architecture as a tissue over time the various constituent cell types appear functionally the same. Functional phases are: early fluid transportation (0-1 h) and extracellular activity (10-90 min); through rising food absorption (10 min to > 1 day); to slow intracellular meal processing and degenerative egestive waste material production (1 to > 12 days) much as in ticks. The same epithelium is both absorptive and degenerative in role. The switch in predominant physiology begins 4 h after the start of feeding. Two separate pulses of clavate cells appear to be a mechanism to facilitate transport by increasing epithelial surface area in contact with the lumen. Free-floating cells may augment early extracellular lumenal digestion. Possible evidence for salivary enzyme alkaline-related extra-corporeal digestion was found. Giant mycetome-like cells were found embedded in the mid-gut wall. Anteriorly, the mid-gut behaves like a temporally expendable food processing tissue and minor long-term resistive store. Posteriorly the mid-gut behaves like a major assimilative/ catabolic tissue and 'last-out' food depot (i.e., a 'hepatopancreas' function) allowing the mite to resist starvation for up to 3.5 weeks after a single meal. A 'conveyor-belt' wave Extended author information available on the last page of the article Research Council grant B/77307818 at Liverpool John Moores University. Thanks go to Susan Bjornson (then at University of Alberta, Canada) for advice on invertebrate sporozoans and Don E Johnston (Ohio Sta...

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Section: Review Of the Fieldmentioning

confidence: 99%

The gut epithelium from feeding to fasting in the predatory soil mite Pergamasus longicornis (Mesostigmata: Parasitidae): one tissue, two roles

Bowman

2019

Exp Appl Acarol

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Boophiline, an antimicrobial sterol amide from the cattle tick boophilus microplus

Potterat¹,

Hostettmann²,

Höltzel³

et al. 1997

Helvetica Chimica Acta

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Boophiline (1), a new sterol amide was isolated from the cattle tick Boophilus microplus (Ixodidae). The structure was assigned as N‐[3‐(sulfooxy)‐25ξcholest‐5‐en‐26‐oyl]‐L‐isoleucine by detailed 2D NMR investigations in conjunction with FAB mass spectrometry and acidic hydrolyses. Complete assignment of the diastereotopic methylene protons of the ring system could be deduced from the NMR data. In agar dilution assays, 1 exhibited antifungal properties against Cladosporium cucumerinum and antibacterial activity against Bacillus subtilis and Escherichia coli.

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Observation on the composition and biosynthesis of egg wax lipids in the cattle tick,Boophilus microplus

Booth¹

1992

Exp Appl Acarol

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The biosynthesis of wax lipids by Gené's organ, the egg waxing organ in ticks, was investigated. Gené's organ, a complex dermal gland system, applies a superficial wax layer to the eggs during oviposition which prevents desiccation and is essential for egg viability. The detailed anatomy and histology of the three gland cell types are unambiguously described. Serial sectioning of ticks showed that all three gland cell types are capable of contributing to the egg wax. The wax synthetic ability of these three gland types was characterized. The composition of wax lipids extracted from the surface egg wax, and from the three types of wax gland dissected from ovipositing ticks, was analysed using thin-layer and gas-liquid chromatography. Injection of ovipositing ticks with radiolabelled acetate resulted in the incorporation of the label into wax lipids by gland cells of Gené's organ. The egg wax was a complex mixture of long-chain alkanes and fatty acid esters. The gland cells contained a greater proportion of shorter chain alkanes than were present in the egg surface wax. Some unsaturated long-chain fatty acids were present, and these were more abundant in the gland cells than in the surface wax of oviposited eggs, suggesting that oxidation occurs after oviposition. The results confirm that the tubular glands, acinar accessory glands and lobular glands of Gené's organ all contribute to the egg waxes, although the lipid components differed in relative abundance. The results are also consistent with alkane synthesis from fatty acids in Gené's organ by a chain-elongation-decarboxylation pathway.

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Utilization of cholesterol by the cattle tick Boophilus microplus: Cholesterol economy in the engorged female adult

Cited by 10 publications

References 18 publications

The gut epithelium from feeding to fasting in the predatory soil mite Pergamasus longicornis (Mesostigmata: Parasitidae): one tissue, two roles

The gut epithelium from feeding to fasting in the predatory soil mite Pergamasus longicornis (Mesostigmata: Parasitidae): one tissue, two roles

Boophiline, an antimicrobial sterol amide from the cattle tick boophilus microplus

Observation on the composition and biosynthesis of egg wax lipids in the cattle tick,Boophilus microplus

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