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Contreras-Solís I, Pasciu V, Porcu C, Sotgiu FD, Todorova N, Baralla E, Mara L, Gallus M, Cabiddu A, Dattena M, Abecia JA, Berlinguer F. The Effect of By-Pass Linseed Oil Supplementation on the Maternal Antioxidant System during the Embryo-Maternal Recognition Period in Ewes. Animals (Basel) 2023; 13:2565. [PMID: 37627356 PMCID: PMC10451800 DOI: 10.3390/ani13162565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/01/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
This study analyzed the effects of dietary supplementation with by-pass linseed oil (LO; rich in α-linolenic acid) on maternal antioxidant systems at Days 14 and 16 of pregnancy in Sarda ewes. This trial used sixteen dry ewes. Eight ewes (CT group) were fed with a control diet without LO, and eight ewes (LO group) were fed with a diet supplemented with LO (10.8 g of α-linolenic acid/ewe/day). Both diets had similar crude protein and energy levels. The experiment included 10 days of an adaptation period and 31 days of a supplementation period. This supplementation period was divided into Period -2 (from Day -15 to -8), Period -1 (from Day -7 to -1; before synchronized mating period/Day 0), Period +1 (from Day +1 to + 7 after mating), and Period +2 (from Day +8 to +15 after mating). Estrous synchronization was induced in all the ewes using an intravaginal sponge (45 mg fluorgestone acetate) for 14 days and equine chorionic gonadotropin (350 UI/ewe) at the end of the treatment. On Days 14 (CT, N = 4; LO, N = 4) and 16 (CT, N = 4; LO, N = 4) after mating, the ewes were slaughtered. Samples of plasma, uterine, and luteal tissues were collected. Thiols, total antioxidant activity (TEAC), superoxide dismutase (SOD) activity, and malondialdehyde (MDA) content were measured. On Day 16, thiol and TEAC in luteal tissues were higher in the LO group when compared with the control one (p < 0.05). Moreover, TEAC was higher for the LO group in uterine tissues on Days 14 and 16 (p < 0.05). SOD activity was higher in the LO group in luteal and uterine tissues on Day 14 and Day 16, respectively (p < 0.001). On Day 16, uterine MDA content was lower for the LO group (p < 0.001). No differences were found between groups at the plasmatic level. However, the by-pass LO supplementation enhanced the analyzed antioxidant parameters in luteal and uterine tissues. In conclusion, these results demonstrate that by-pass LO supplementation exerted a positive effect on antioxidative defenses on maternal structures during the embryo-maternal recognition period in ewes. Thus, this could contribute to improving the maternal environment during the embryo-maternal recognition period in mammals.
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Affiliation(s)
- Ignacio Contreras-Solís
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (C.P.); (F.D.S.); (N.T.); (E.B.); (F.B.)
| | - Valeria Pasciu
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (C.P.); (F.D.S.); (N.T.); (E.B.); (F.B.)
| | - Cristian Porcu
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (C.P.); (F.D.S.); (N.T.); (E.B.); (F.B.)
| | - Francesca D. Sotgiu
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (C.P.); (F.D.S.); (N.T.); (E.B.); (F.B.)
| | - Neda Todorova
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (C.P.); (F.D.S.); (N.T.); (E.B.); (F.B.)
| | - Elena Baralla
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (C.P.); (F.D.S.); (N.T.); (E.B.); (F.B.)
| | - Laura Mara
- Department of Animal Science, AGRIS Sardegna, Loc. Bonassai, 07100 Sassari, Italy; (L.M.); (M.G.); (A.C.); (M.D.)
| | - Marilia Gallus
- Department of Animal Science, AGRIS Sardegna, Loc. Bonassai, 07100 Sassari, Italy; (L.M.); (M.G.); (A.C.); (M.D.)
| | - Andrea Cabiddu
- Department of Animal Science, AGRIS Sardegna, Loc. Bonassai, 07100 Sassari, Italy; (L.M.); (M.G.); (A.C.); (M.D.)
| | - Maria Dattena
- Department of Animal Science, AGRIS Sardegna, Loc. Bonassai, 07100 Sassari, Italy; (L.M.); (M.G.); (A.C.); (M.D.)
| | | | - Fiammetta Berlinguer
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (C.P.); (F.D.S.); (N.T.); (E.B.); (F.B.)
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Quirke LD, Maclean PH, Haack NA, Edwards SJ, Heiser A, Juengel JL. Characterization of local and peripheral immune system in pregnant and nonpregnant ewes. J Anim Sci 2021; 99:6317661. [PMID: 34240172 PMCID: PMC8363041 DOI: 10.1093/jas/skab208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 07/07/2021] [Indexed: 12/16/2022] Open
Abstract
Modulation of the immune system is known to be important for successful pregnancy but how immune function might differ between the lymph nodes draining the reproductive tract and peripheral lymph nodes is not well understood. Additionally, if immune system changes in response to the presence of an embryo during early pregnancy, and if this response differs in local versus peripheral immune tissue, has not been well characterized. To address these questions, we examined expression of genes important for immune function using NanoString technology in the ampulla and isthmus of the oviduct, endometrium, lymph nodes draining the reproductive tract (lumbo-aortic and medial iliac) as well as a peripheral lymph node (axillary), the spleen, and circulating immune cells from ewes on day 5 of the estrous cycle or pregnancy. Concentrations of estradiol and progesterone in plasma were also determined. Principal component analysis revealed separation of the local from the peripheral lymph nodes (MANOVA P = 3.245e-08, R2 = 0.3) as well as separation of tissues from pregnant and nonpregnant animals [lymph nodes (MANOVA P = 2.337e-09, R2 = 0.5), reproductive tissues (MANOVA P = 2.417e-14, R2 = 0.47)]. Nine genes were differentially (FDR < 0.10) expressed between lymph node types, with clear difference in expression of these genes between the lumbo-aortic and axillary lymph nodes. Expression of these genes in the medial iliac lymph node was not consistently different to either the axillary or the lumbo-aortic lymph node. Expression of IL10RB was increased (FDR < 0.05) by 24% in the reproductive tissue of the pregnant animals compared to nonpregnant animals. Analysis of gene categories revealed that expression of genes of the T-cell receptor pathway in reproductive tract tissues was associated (P < 0.05) with pregnancy status. In conclusion, assessment of gene expression of reproductive and immune tissue provides evidence for a specialization of the local immune system around the reproductive tract potentially important for successful establishment of pregnancy. Additionally, differences in gene expression patterns in reproductive tissue from pregnant and nonpregnant animals could be discerned as early as day 5 of pregnancy. This was found to be associated with expression of genes important for T-cell function and thus highlights the important role of these cells in early pregnancy.
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Affiliation(s)
- Laurel D Quirke
- Reproduction, Animal Science, Invermay Agricultural Centre, AgResearch Ltd, Mosgiel, 9092, New Zealand
| | - Paul H Maclean
- Bioinformatics and Statistics, AgResearch Ltd, Grasslands Research Centre, Private Bag 11008, Palmerston North, New Zealand
| | - Neville A Haack
- Infectious Diseases, Hopkirk Research Institute, AgResearch Ltd, Private Bag 11008, Palmerston North, 4442, New Zealand
| | - Sara J Edwards
- Reproduction, Animal Science, Invermay Agricultural Centre, AgResearch Ltd, Mosgiel, 9092, New Zealand
| | - Axel Heiser
- Infectious Diseases, Hopkirk Research Institute, AgResearch Ltd, Private Bag 11008, Palmerston North, 4442, New Zealand
| | - Jennifer L Juengel
- Reproduction, Animal Science, Invermay Agricultural Centre, AgResearch Ltd, Mosgiel, 9092, New Zealand.,Infectious Diseases, Hopkirk Research Institute, AgResearch Ltd, Private Bag 11008, Palmerston North, 4442, New Zealand
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Gabai G, Mongillo P, Giaretta E, Marinelli L. Do Dehydroepiandrosterone (DHEA) and Its Sulfate (DHEAS) Play a Role in the Stress Response in Domestic Animals? Front Vet Sci 2020; 7:588835. [PMID: 33195624 PMCID: PMC7649144 DOI: 10.3389/fvets.2020.588835] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/25/2020] [Indexed: 12/16/2022] Open
Abstract
In animal husbandry, stress is often associated with poor health and welfare. Stress occurs when a physiological control system detects a state of real or presumptive threat to the animal's homeostasis or a failure to control a fitness-critical variable. The definition of stress has mostly relied on glucocorticoids measurement, even though glucocorticoids represent one stress-response system, the hypothalamus-pituitary-adrenocortical axis, which is not precise enough as it is also related to metabolic regulation and activated in non-stressful situations (pleasure, excitement, and arousal). The mammal adrenal can synthesize the androgenic steroid dehydroepiandrosterone (DHEA) and its sulfate metabolite (DHEAS), which have been associated to the stress response in several studies performed mostly in humans and laboratory animals. Although the functions of these steroids are not fully understood, available data suggest their antagonistic effects on glucocorticoids and, in humans, their secretion is affected by stress. This review explores the scientific literature on DHEA and DHEAS release in domestic animals in response to stressors of different nature (inflammatory, physical, or social) and duration, and the extra-adrenal contribution to circulating DHEA. Then, the potential use of DHEA in conjunction with cortisol to improve the definition of the stress phenotype in farmed animals is discussed. Although the focus of this review is on farmed animals, examples from other species are reported when available.
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Affiliation(s)
- Gianfranco Gabai
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Paolo Mongillo
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Elisa Giaretta
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Lieta Marinelli
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
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Frangeul L, Blanc H, Saleh MC, Suzuki Y. Differential Small RNA Responses against Co-Infecting Insect-Specific Viruses in Aedes albopictus Mosquitoes. Viruses 2020; 12:E468. [PMID: 32326240 DOI: 10.3390/v12040468] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/15/2020] [Accepted: 04/17/2020] [Indexed: 12/23/2022] Open
Abstract
The mosquito antiviral response has mainly been studied in the context of arthropod-borne virus (arbovirus) infection in female mosquitoes. However, in nature, both female and male mosquitoes are frequently infected with insect-specific viruses (ISVs). ISVs are capable of infecting the reproductive organs of both sexes and are primarily maintained by vertical transmission. Since the RNA interference (RNAi)-mediated antiviral response plays an important antiviral role in mosquitoes, ISVs constitute a relevant model to study sex-dependent antiviral responses. Using a naturally generated viral stock containing three distinct ISVs, Aedes flavivirus (AEFV), Menghai rhabdovirus (MERV), and Shinobi tetra virus (SHTV), we infected adult Aedes albopictus females and males and generated small RNA libraries from ovaries, testes, and the remainder of the body. Overall, both female and male mosquitoes showed unique small RNA profiles to each co-infecting ISV regardless of the sex or tissue tested. While all three ISVs generated virus-derived siRNAs, only MERV generated virus-derived piRNAs. We also studied the expression of PIWI genes in reproductive tissues and carcasses. In contrast to Piwi5-9, Piwi1-4 were abundantly expressed in ovaries and testes, suggesting that Piwi5-9 are involved in exogenous viral piRNA production. Together, our results show that ISV-infected Aedes albopictus produce viral small RNAs in a virus-specific manner and that male mosquitoes mount a similar small RNA-mediated antiviral response to that of females.
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Ferreira CER, Haas CS, Goularte KL, Rovani MT, Cardoso FF, Schneider A, Gasperin BG, Lucia T. Expression of paraoxonase types 1, 2 and 3 in reproductive tissues and activity of paraoxonase type 1 in the serum and seminal plasma of bulls. Andrologia 2017; 50. [PMID: 29143963 DOI: 10.1111/and.12923] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2017] [Indexed: 11/28/2022] Open
Abstract
The paraoxonases types 1, 2 and 3 (PON1, PON2 and PON3, respectively) are enzymes that degrade lipid peroxides, preventing oxidative damages relevant for male reproductive function. This study determined the expression of those three paraoxonases in reproductive tissues of bulls and evaluated correlations among the activity of PON1 in the serum and seminal plasma with breeding soundness parameters in bulls. The expression of PON1, PON2 and PON3 was characterised by RT-PCR in samples of testicular parenchyma, vesicular glands and epididymis collected from three slaughtered bulls. All three paraoxonases were expressed in the testicular parenchyma, PON2 and PON3 were both expressed in the epididymis head and PON3 was also expressed in the epididymis tail. The PON1 activity was determined in samples of serum and seminal plasma from 110 bulls submitted to breeding soundness evaluation. There was a strong correlation (r = .90) between the activity of the PON1 in both serum and seminal plasma (p < .0001). The PON1 activity in the seminal plasma was positively correlated with ejaculate's colour, sperm mass activity (p = .04), motility, vigour and viability (all p < .01). Thus, PON1 may be a potential marker for sperm motility and viability in bulls.
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Affiliation(s)
- C E R Ferreira
- ReproPEl, Universidade Federal de Pelotas, Pelotas-RS, Brazil.,Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas-RS, Brazil
| | - C S Haas
- ReproPEl, Universidade Federal de Pelotas, Pelotas-RS, Brazil.,Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas-RS, Brazil
| | - K L Goularte
- ReproPEl, Universidade Federal de Pelotas, Pelotas-RS, Brazil.,Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas-RS, Brazil
| | - M T Rovani
- Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas-RS, Brazil
| | | | - A Schneider
- Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas-RS, Brazil
| | - B G Gasperin
- ReproPEl, Universidade Federal de Pelotas, Pelotas-RS, Brazil.,Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas-RS, Brazil
| | - T Lucia
- ReproPEl, Universidade Federal de Pelotas, Pelotas-RS, Brazil.,Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas-RS, Brazil
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Roig-Villanova I, Martínez-García JF. Plant Responses to Vegetation Proximity: A Whole Life Avoiding Shade. Front Plant Sci 2016; 7:236. [PMID: 26973679 PMCID: PMC4770057 DOI: 10.3389/fpls.2016.00236] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 02/12/2016] [Indexed: 05/20/2023]
Abstract
In high density of vegetation, plants detect neighbors by perceiving changes in light quality through phytochrome photoreceptors. Close vegetation proximity might result in competition for resources, such as light. To face this challenge, plants have evolved two alternative strategies: to either tolerate or avoid shade. Shade-avoiding species generally adapt their development by inducing hypocotyl, stem, and petiole elongation, apical dominance and flowering, and decreasing leaf expansion and yield, a set of responses collectively known as the shade avoidance syndrome (SAS). The SAS responses have been mostly studied at the seedling stage, centered on the increase of hypocotyl elongation. After compiling the main findings about SAS responses in seedlings, this review is focused on the response to shade at adult stages of development, such as petioles of adult leaves, and the little information available on the SAS responses in reproductive tissues. We discuss these responses based on the knowledge about the molecular mechanisms and components with a role in regulating the SAS response of the hypocotyls of Arabidopsis thaliana. The transcriptional networks involved in this process, as well as the communication among the tissues that perceive the shade and the ones that respond to this stimulus will also be briefly commented.
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Affiliation(s)
- Irma Roig-Villanova
- Centre for Research in Agricultural Genomics (CRAG), Consejo Superior de Investigaciones Científicas – Institut Recerca i Tecnologia Agroalimentaries – Universitat Autònoma de Barcelona – Universitat de BarcelonaBarcelona, Spain
- *Correspondence: Irma Roig-Villanova, ; Jaime F. Martínez-García,
| | - Jaime F. Martínez-García
- Centre for Research in Agricultural Genomics (CRAG), Consejo Superior de Investigaciones Científicas – Institut Recerca i Tecnologia Agroalimentaries – Universitat Autònoma de Barcelona – Universitat de BarcelonaBarcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA)Barcelona, Spain
- *Correspondence: Irma Roig-Villanova, ; Jaime F. Martínez-García,
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Vimolmangkang S, Han Y, Wei G, Korban SS. An apple MYB transcription factor, MdMYB3, is involved in regulation of anthocyanin biosynthesis and flower development. BMC Plant Biol 2013; 13:176. [PMID: 24199943 PMCID: PMC3833268 DOI: 10.1186/1471-2229-13-176] [Citation(s) in RCA: 129] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 11/04/2013] [Indexed: 05/18/2023]
Abstract
BACKGROUND Red coloration of fruit is an important trait in apple, and it is mainly attributed to the accumulation of anthocyanins, a class of plant flavonoid metabolites. Anthocyanin biosynthesis is genetically determined by structural and regulatory genes. Plant tissue pigmentation patterns are mainly controlled by expression profiles of regulatory genes. Among these regulatory genes are MYB transcription factors (TFs), wherein the class of two-repeats (R2R3) is deemed the largest, and these are associated with the anthocyanin biosynthesis pathway. Although three MdMYB genes, almost identical in nucleotide sequences, have been identified in apple, it is likely that there are other R2R3 MYB TFs that are present in the apple genome that are also involved in the regulation of coloration of red color pigmentation of the skin of apple fruits. RESULTS In this study, a novel R2R3 MYB gene has been isolated and characterized in apple. This MYB gene is closely related to the Arabidopsis thaliana AtMYB3, and has been designated as MdMYB3. This TF belongs to the subgroup 4 R2R3 family of plant MYB transcription factors. This apple MdMYB3 gene is mapped onto linkage group 15 of the integrated apple genetic map. Transcripts of MdMYB3 are detected in all analyzed tissues including leaves, flowers, and fruits. However, transcripts of MdMYB3 are higher in excocarp of red-skinned apple cultivars than that in yellowish-green skinned apple cultivars. When this gene is ectopically expressed in Nicotiana tabacum cv. Petite Havana SR1, flowers of transgenic tobacco lines carrying MdMYB3 have exhibited increased pigmentation and accumulate higher levels of anthocyanins and flavonols than wild-type flowers. Overexpression of MdMYB3 has resulted in transcriptional activation of several flavonoid pathway genes, including CHS, CHI, UFGT, and FLS. Moreover, peduncles of flowers and styles of pistils of transgenic plants overexpressing MdMYB3 are longer than those of wild-type plants, thus suggesting that this TF is involved in regulation of flower development. CONCLUSIONS This study has identified a novel MYB transcription factor in the apple genome. This TF, designated as MdMYB3, is involved in transcriptional activation of several flavonoid pathway genes. Moreover, this TF not only regulates the accumulation of anthocyanin in the skin of apple fruits, but it is also involved in the regulation of flower development, particularly that of pistil development.
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Affiliation(s)
- Sornkanok Vimolmangkang
- Department of Natural Resources and Environmental Sciences, University of Illinois, 1201 W. Gregory, Urbana, IL 61801, USA
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand
| | - Yuepeng Han
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Moshan, Wuhan 430074, P. R C
| | - Guochao Wei
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Moshan, Wuhan 430074, P. R C
| | - Schuyler S Korban
- Department of Natural Resources and Environmental Sciences, University of Illinois, 1201 W. Gregory, Urbana, IL 61801, USA
- Department of Biology, University of Massachusetts, Boston, Boston, MA 02125, USA
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Lange AB, Alim U, Vandersmissen HP, Mizoguchi A, Vanden Broeck J, Orchard I. The distribution and physiological effects of the myoinhibiting peptides in the kissing bug, rhodnius prolixus. Front Neurosci 2012; 6:98. [PMID: 22783161 PMCID: PMC3390896 DOI: 10.3389/fnins.2012.00098] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 06/13/2012] [Indexed: 11/13/2022] Open
Abstract
The myoinhibiting peptides (MIPs), also designated as allatostatin-Bs or prothoracicostatic peptides in some insects, are neuropeptides that are characterized by two tryptophan (W) residues at the C-terminal, denoted as the W(X6)Wamide motif. They are believed to be the ancestral ligands for the Drosophila sex peptide (SP) receptor. Physiological functions of MIPs include the inhibition of contraction of insect visceral muscles, in addition to allatostatic and prothoracicostatic activities. The MIP precursor in Rhodnius prolixus encodes MIPs that have an unusual W(X7)Wamide motif. In the present study, MIP-like immunoreactivity was detected within neurons in the central nervous system and within the innervation to the salivary glands, hindgut, and female and male reproductive systems of adult R. prolixus. The effects of peptides with the unusual W(X7)Wamide motif (Rhopr-MIP-4) and with the typical W(X6)Wamide motif (Rhopr-MIP-7) were tested for physiological activity on R. prolixus hindgut contractions. Both peptides reduce the frequency and amplitude of hindgut contractions in a dose-dependent manner. In addition, both peptides activate the Drosophila SP receptor. The MIP/SP receptors are therefore activated by peptides with the unusual W(X7)Wamide motif.
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Affiliation(s)
- Angela B Lange
- Department of Biology, University of Toronto Mississauga Mississauga, ON, Canada
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Orchard I, Lee DH, da Silva R, Lange AB. The Proctolin Gene and Biological Effects of Proctolin in the Blood-Feeding Bug, Rhodnius prolixus. Front Endocrinol (Lausanne) 2011; 2:59. [PMID: 22654816 PMCID: PMC3356076 DOI: 10.3389/fendo.2011.00059] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Accepted: 10/04/2011] [Indexed: 11/20/2022] Open
Abstract
We have reinvestigated the possible presence or absence of the pentapeptide proctolin in Rhodnius prolixus and report here the cloning of the proctolin cDNA. The transcript is expressed in the central nervous system (CNS) and some peripheral tissues. The proctolin prepropeptide encodes a single copy of proctolin along with a possible proctolin-precursor-associated peptide. We have biochemically identified proctolin in CNS extracts and shown its distribution using proctolin-like immunoreactivity. Immunostained processes are found on the salivary glands, female and male reproductive tissues, and heart and associated alary muscles. Proctolin-like immunoreactive bipolar neurons are found on the lateral margins of the common oviduct and bursa. Proctolin is biologically active on R. prolixus tissues, stimulating increases in contraction of anterior midgut and hindgut muscles, and increasing heartbeat frequency. Contrary to the previous suggestion that proctolin is absent from R. prolixus, proctolin is indeed present and biologically active in this medically important bug.
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Affiliation(s)
- Ian Orchard
- Department of Biology, University of Toronto MississaugaMississauga, ON, Canada
- *Correspondence: Ian Orchard, Department of Biology, University of Toronto Mississauga, 3359 Mississauga Road, Mississauga, ON, Canada L5L 1C6. e-mail:
| | - Do Hee Lee
- Department of Biology, University of Toronto MississaugaMississauga, ON, Canada
| | - Rosa da Silva
- Department of Biology, University of Toronto MississaugaMississauga, ON, Canada
| | - Angela B. Lange
- Department of Biology, University of Toronto MississaugaMississauga, ON, Canada
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