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Vilcinskas A, Kopacek P, Jegorov A, Vey A, Matha V. Detection of Lipophorin as the Major Cyclosporin-Binding Protein in the Hemolymph of the Greater Wax Moth Galleria mellonella. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0742-8413(96)00235-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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52
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Coelho HS, Atella GC, Moreira MF, Gondim KC, Masuda H. Lipophorin density variation during oogenesis on Rhodnius prolixus. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 1997; 35:301-313. [PMID: 9177134 DOI: 10.1002/(sici)1520-6327(199705)35:3<301::aid-arch4>3.0.co;2-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The density of lipophorin was determined in adult females of Rhodnius prolixus on different days after a meal. Several populations od lipoproteins, differing in density but always in the range of HDL, were found in the hemolymph. The density of the major population was analyzed and a complex profile of density variation was found associated with the principal metabolic events in these insects digestion and oogenesis. During the initial three days after the blood meal, with the onset of the digestive process, the density of lipophorin decreased from 1.1185 g/l to 1.1095 g/l, associated with the transfer of lipids from midgut to the lipophorin particles. During the period of intense vitellogenesis and lipid uptake by the ovary, the lipophorin density started to increase and reached the value, 1.1322 g/l, and remained stable up to the end of oogenesis. As soon as the requirement of lipids to build up the oocytes ceased, the density of lipophorin decreased to its initial value associated with the transfer of lipids from fat body to lipophorin. Soon after the blood meal the midgut was the main source of lipids capable of replenishing the lipophorin particles, while the fat body assumed this function during the succeeding days and reached its maximum capacity around day 10, as estimated by the rate of lipid transfer. The principal lipids transferred were phospholipids and diacylglycerols. Except in the protein/lipid ratio no major changes were observed among different lipids isolated from lipophorin of different densities.
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Affiliation(s)
- H S Coelho
- Departamento de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Brazil
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53
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Machado EA, Atella GC, Gondim KC, de Souza W, Masuda H. Characterization and immunocytochemical localization of lipophorin binding sites in the oocytes of Rhodnius prolixus. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 1996; 31:185-196. [PMID: 11488303 DOI: 10.1002/(sici)1520-6327(1996)31:2<185::aid-arch6>3.0.co;2-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Purified lipophorin, metabolically labelled with 32P exclusively in the phospholipid moiety, was used to study the process of phospholipid delivery to the oocyte. The kinetics of phospholipid transfer "in vitro," from lipophorin to the oocytes, was linear at least up to 4 h and was impaired by low temperature. A net transfer of phospholipids from lipophorin particles to the oocytes was observed. The rate of phospholipid uptake was dependent on the concentration of lipophorin in the medium and was shown to be a saturable process. The addition of a molar excess of purified unlabelled lipophorin to the culture medium resulted in a substantial decrease in the transfer of [32P]phospholipids, but no reduction occurred in the presence of a molar excess of albumin. The lipophorin binding sites were localized in the oocytes by immunogold techniques using two different protocols for oocyte fixation. Strong labelling was observed especially at the microvilli. No labelling was detected in the yolk granules.
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Affiliation(s)
- E A Machado
- Departamento de Bioquímica Médica, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio De Janeiro, Brazil
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54
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Pho DB, Pennanec'h M, Jallon JM. Purification of adult Drosophila melanogaster lipophorin and its role in hydrocarbon transport. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 1996; 31:289-303. [PMID: 8742826 DOI: 10.1002/(sici)1520-6327(1996)31:3<289::aid-arch4>3.0.co;2-t] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Lipophorin was isolated from homogenized adult Drosophila melanogaster. It is stained by Sudan Black and has a native molecular mass of 640 kD and a density of 1.12 g/ml. It consists of two glycosylated apoproteins of 240 and 75 kDa. Gas chromatography and mass spectrometry showed that lipophorins isolated separately from virgin 3-day-old male and female flies were associated with specific hydrocarbons, and that these were the same hydrocarbons found in male and female cuticles, respectively. Moreover, a pool of internal hydrocarbons was demonstrated for the first time, with chain lengths similar to those of the cuticular pool. Studies on the fate of the hydrocarbons synthesized de novo after topical applications of radiolabelled fatty acid precursors showed a decrease of the internal pool of hydrocarbons with time, concomitant with an increase of the cuticular pool. These results suggest that hydrocarbons synthesized at an internal site, possibly in oenocytes, may be transported to the cuticle of the flies by lipophorin.
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Affiliation(s)
- D B Pho
- Laboratoire des Mécanismes de Communication, CNRS URA 1491, Université de Paris-Sud, Orsay, France
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55
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Kurama T, Kurata S, Natori S. Molecular Characterization of an Insect Transferrin and its Selective Incorporation into Eggs During Oogenesis. ACTA ACUST UNITED AC 1995. [DOI: 10.1111/j.1432-1033.1995.tb20254.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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56
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Affiliation(s)
- B J Blacklock
- Department of Biochemistry, University of Alberta, Edmonton, Canada
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57
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Purification and properties of a phosphorylatable triacylglycerol lipase from the fat body of an insect, Manduca sexta. J Lipid Res 1994. [DOI: 10.1016/s0022-2275(20)41163-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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58
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Soulages JL, Wells MA. Lipophorin: the structure of an insect lipoprotein and its role in lipid transport in insects. ADVANCES IN PROTEIN CHEMISTRY 1994; 45:371-415. [PMID: 8154373 DOI: 10.1016/s0065-3233(08)60644-0] [Citation(s) in RCA: 130] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- J L Soulages
- Department of Biochemistry, University of Arizona, Tucson 85721
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59
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Van Antwerpen R, Conway R, Law JH. Protein and lipoprotein uptake by developing oocytes of the hawkmoth Manduca sexta. An ultrastructural and immunocytochemical study. Tissue Cell 1993; 25:205-18. [PMID: 8511765 DOI: 10.1016/0040-8166(93)90020-l] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The ultrastructure of developing Manduca sexta oocytes is described with respect to the endocytic pathway for protein incorporation. Three major (lipo) protein components of mature M. sexta eggs, lipophorin, vitellogenin and microvitellogenin, were localized along this pathway by immuno-fluorescence and immuno-gold labeling techniques. Labeling of the antigens was observed in the extracellular spaces of the follicle. In those cases where fixation and en bloc staining procedures did not destroy antigenicity, antigens were detected in coated pits and coated vesicles near the plasma membrane of the oocyte. All three antigens were demonstrated to be present in endosomes in the cortex of the oocyte. Both the morphology and the labeling pattern of the endosomes indicate that this organelle is a compartment of uncoupling of receptor and ligand. Tubular elements at the surface of the endosome, interpreted to be involved in the recycling of receptors and membrane to the oocyte surface, were not labeled. Strong labeling of lipophorin, vitellogenin and microvitellogenin was observed in the developing yolk bodies, the main protein storage compartment of the oocyte. The uptake and storage of hemolymph proteins and lipoproteins by M. sexta oocytes is discussed in comparison with other insect and vertebrate endocytic systems.
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Affiliation(s)
- R Van Antwerpen
- Department of Biochemistry, University of Arizona, Tucson 85721
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60
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Trowell SC. High affinity juvenile hormone carrier proteins in the haemolymph of insects. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/0305-0491(92)90196-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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61
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Ryan RO, Kay CM, Oikawa K, Liu H, Bradley R, Scraba DG. Effect of particle lipid content on the structure of insect lipophorins. J Lipid Res 1992. [DOI: 10.1016/s0022-2275(20)41883-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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62
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Kawooya JK, van der Horst DJ, van Heusden MC, Brigot BL, van Antwerpen R, Law JH. Lipophorin structure analyzed by in vitro treatment with lipases. J Lipid Res 1991. [DOI: 10.1016/s0022-2275(20)41632-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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63
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Liu H, Ryan RO. Role of lipid transfer particle in transformation of lipophorin in insect oocytes. BIOCHIMICA ET BIOPHYSICA ACTA 1991; 1085:112-8. [PMID: 1909896 DOI: 10.1016/0005-2760(91)90238-d] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Oocyte development in Manduca sexta involves the deposition of large amounts of lipoprotein-derived lipid. One source of this lipid is hemolymph high-density lipophorin-adult (HDLp-A) which, upon entry into the oocyte, is transformed into a lipid and apolipophorin III deficient product particle, egg very-high- density lipophorin (VHDLp-E; density = 1.24 g/ml; Kawooya et al. (1988) J. Biol. Chem. 263, 8740-8747). An in vitro model of this transformation has been established using human low-density lipoprotein (LDL) as acceptor of HDLp-A associated lipid in a reaction catalyzed by isolated M. sexta hemolymph lipid transfer particle (LTP). Facilitated vectorial net transfer of lipid from HDLp-A to LDL resulted in formation of a very-high-density lipophorin (VHDLp) product with a density and apolipoprotein content similar to that of VHDLp-E. Lipid was found to comprise 25% of the VHDLp particle mass, whereas over 50% of HDLp-A mass is lipid. Based on these observations it was hypothesized that a lipid transfer factor may be present in M. sexta oocytes and function in the transformation of HDLp-A to VHDLp-E in vivo. Transfer activity was present in the buffer soluble fraction of oocyte homogenates and purification of the active material revealed a catalyst with electrophoretic and immunological properties identical to hemolymph LTP. Incubation of 125I-HDLp-A with an M. sexta oocyte homogenate resulted in transformation of the radiolabeled lipoprotein to a density corresponding to that of VHDLp-E. When the incubation media was preincubated with anti-LTP IgG this conversion was inhibited to a large extent. Inhibition was relieved, however, by addition of exogenous LTP. The results provide the first demonstration of M. sexta LTP in a tissue other than hemolymph and support the concept that LTP-catalyzed lipid transfer plays an integral role in the conversion of HDLp-A to VHDLp-E in vivo.
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Affiliation(s)
- H Liu
- Department of Biochemistry, University of Alberta, Edmonton, Canada
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64
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van Heusden MC, Fogarty S, Porath J, Law JH. Purification of insect vitellogenin and vitellin by gel-immobilized ferric chelate. Protein Expr Purif 1991; 2:24-8. [PMID: 1821769 DOI: 10.1016/1046-5928(91)90004-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Vitellogenin and vitellin of Manduca sexta and some other insect species were purified by immobilized metal ion affinity chromatography. Ferric ion was chosen as the immobilized metal ion. Agarose-bound carboxymethylpicolylamine was used as the chelating adsorbent for the ferric ion. Vitellogenin and vitellin, both phosphorylated lipoproteins, were shown to bind specifically to the iron. The general applicability of immobilized ferric ion affinity chromatography for the purification of insect vitellogenin and vitellin is suggested.
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Affiliation(s)
- M C van Heusden
- Department of Biochemistry, Biological Sciences West, University of Arizona, Tucson 85721
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65
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Lipophorin in developing adults of Hyalophora cecropia: Support of yolk formation and preparation for flight. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0020-1790(91)90036-e] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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66
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Rosell R, Coons LB. Purification and partial characterization of vitellin from the eggs of the hard tick, Dermacentor variabilis. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0020-1790(91)90094-u] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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67
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A novel protein produced by the vitellogenic fat body and accumulated in mosquito oocytes. ACTA ACUST UNITED AC 1990; 199:114-121. [DOI: 10.1007/bf02029559] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/1990] [Accepted: 05/18/1990] [Indexed: 10/25/2022]
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68
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69
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Insect lipid transfer particle catalyzes bidirectional vectorial transfer of diacylglycerol from lipophorin to human low density lipoprotein. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(18)86982-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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70
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Isolation and characterization of a lipoprotein receptor from the fat body of an insect, Manduca sexta. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(19)39428-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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71
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Kulakosky PC, Telfer WH. Kinetics of yolk precursor uptake in Hyalophora cecropia: Stimulation of microvitellin endocytosis by vitellogenin. ACTA ACUST UNITED AC 1989. [DOI: 10.1016/0020-1790(89)90041-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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73
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