tì--g^î,6 THE ZEBRAFISH D'4,NIO RERIO; A PISCINE MODEL FOR BIOTECHNOLOGY by Paul John Verma M.Sc. Department of Obstetrics and Gynaecology, University of Adelaide, Adelaide, Australia A thesis submitted to the University of Adelaide in fulfilment of the requirements for admission to the degree of Doctor of Philosophy November t995 For Daphne, Lorraine and Ivan II TABLE OF CONTENTS LIST OF TABLES AND FIGURES..... v11 LIST OF PLATES.. 1X ABBREVIATIONS...... X1 ABSTRACT XlV DECLARAÏON............. XV111 ACKNOWLEDGMENTS ... XlX xx PUBLICATIONS INTRODUCTION .................'."" L L.L REVIEW. LITERATURE ...,......,..2 1..2 MANIPULATIONS L.3 SINGLE GENE ..........3 L.3.L Transgenic fish - The Pros and Cons... 4 l-.3.2 Gene Transfer Techniques Investigated 5 L.3.2.L Non piscean species....'..' 5 1..3.2.2 Pisceans 8 1.3.3 Gene Constructs Investigated............ 9 1.3.3.3 Future APPlications 11 1.3.4 Assessment of Transgenics ..'.' 12 1.3.4.tMosaicism """"""""72 1,.3.4.2 Lrtegration. 72 1..3.4.3 Expression. 13 1,.3.4.4 Germline transmissron ...'....'........' 13 PARTIAL GENOME MANIPULATION L3 1..4 1,.4.1 Embryonic Stem cells 1,4 1..4.2 Aggregation Chimeras .... 15 1,.4.3 Hybridization in fish 16 L.4.4 Ploidy Mosaic chimeras. 1.6 MANIPULATIONS............... ENTIRE GENOME ....L7 1-.5 MANIPULATIONS (A) CHROMOSOME SET ..........,..17 L.5.1 Triploidy ......... 18 1.5.1.1 Induction of TriPloidY 18 1.5.L.2 Survival and Viability of Triploids 20 1.5.2 Tetraploidy ........ 22 1..5.2.L hrduction of tetraploidy.'..........'..... 22 1,.5.2.2 Survival and Viability of Tetraploids 22 1..5.3 Analysis of Polyploidy'........'..'. ...................... 25 1.5.3.1 Karyotyping.................. 25 7.5.3.2 Erythrocyte (RBC) Nuclear Volume .'..... 25 1.5.3.3 Flow Cytometer......"....'. 26 1,.5.3.4 Coulter counter 26 1.5.3.5 Nuclear Components.....'............. 26 1,.5.3.6 Protein Electrophoresis .............' 26 t.5.3.7 Phenotypic Markers'....' 27 (B) MONOSEX POPULATIONS 27 L.5.4 Gynogenesis 27 1,.5.4.7 Sperm hractivation. 28 lll Androgenesis """ 30 L.5.5 inactivation """""""""""30 1.5.5.1 Oocyie I.5.5.2Phyiical treatments.. """"""""""31 L.5.6 Identification of Gynogenetic and Androgenetic Diploids..'.................31 L.5.6.1. Hybrid Markers """""""""""""'31 Markers...... """""""""""'32 1,.5.6.2Ailetic Markers...... """"""""""'32 1.5.6.3 Genetic 1..5.7 SexControl of homozygous diPloid fish 1.5.8 Production of Inbred Lines of Fish 34 1.5.8.1 Inbreeding DePression 36 1.5.9 Sex Inversion.... 37 REARING......... L.6 LARVAL """"'37 38 1.6.1 Feeds......... 1,.6.1,.1, Dry feeds... 38 1,.6.1,.2 Live feeds.. 39 1.6.1,.3 Frozen feeds........... 39 t.6.2 Physical Factors ...... 40 1..6.2.1, Water QualitY. "..'. 40 L.6.2.2 Temperature 41. 41. 1.6.3 Conclusion...'.. 41 ......... 2.0 GENERAL MATERIALS AND METHODS .......43 ..........43 2.L.L Hank's Balanced Salt Solution (HBSS) ..... ..........43 2.1,.2 F idn Ringer's Solution ..........43 2.1..3 Earle' s 199 Medium ..........43 2.1.4 Benzocaine (Ethyl-4-aminobenzoate) ......'.... 43 STOCKS 2.2 MAINTAINING FISH ...,..,.......44 2.2.1Danio rerio and D. frønkei 44 44 2.2.1.1. Tanks 47 2.2.2 Oryziøs løtipes 2.2.2.1. Tanks 47 2.2.2.2Food........... """""""'48 FISH 2.3 BREEDING ""' 48 2.3.1 Danios 48 2.3.L.1 Natural Spawning... 48 2.3.1,.2Artificial Insemination (AI) 49 2.3.2 Medaka. 50 2.3.2.1. Natural SPawning... 50 2.3.2.2 Artif icial Insemination 50 2.3.2.3In Vitro Maturation """"""""""'51 LARVAE 2.4 REARING OF DANIO .............51. 2.4.1Prcduction of Live Food... 51 2.4.1.7 Brine shrimp Artemia salina 51 2.4.7.2 Paramecia P. caudatum 52 2.4.1,.3 Microworms (Anguilla silusiae) 53 2.4.2 F eeding protocol.............'.. 53 2.4.2.1, First (Starter) Food.....'.. 53 2.4.2.2Secondary Live Food'.. 54 2.4.2.3 Supplemental DrY Food 54 lv 2.5 ANALYTICAL METHODS .............. 54 2.5.1, Production of transgene constructs... 54 2.5.2 DNA Analysis.. 55 2.5.2.L Collection of tissues.... 57 2.5.2.2 Purification of genomic DNA'..'..'.'.. 57 2.5.2.3 Polymerase Chain Analysis (PCR) 57 2.5.3 Transgene Expression Assays.. ,58 2.5.3.1 Collection of tissues.... ..58 2.5.3.2 Luciferase Assay 58 2.5.3.3 b-Galactosidase AssaY...' 59 2.5.4Karyotyping 59 3.0 SINGLE GENE MANIPULATION (TRANSGENESIS)........... 61- INTRODUCTION 6L 3.1. 3.2. TRANSGENESIS METHODS........... 63 3.2.1 Micromanipulation for Gene Transfer 63 9.2.L.1, Micromanipulation System for Gene Transfer 63 3.2.7.2 Manipulation PiPettes 64 3.2.2 Trunsgene Preparation................ 64 3.2.3 Microinjection of DNA 65 3.2. BvaIuation of Gene Transfer 66 3.3. STATISTICAL ANALYSES............. 66 3.4 EXPERIMENTAL............... 66 3.4.L Comparison of Sperm Mediated Transfer of Circular and Linear Constructs in the ZebrafishDanio rerio ................ 66 Outline....... """""""'66 3.4.L.7 g.4.1,.2 Results """""""""""67 3.4.2 Patterns of Expression of Luciferase, Exhibited by Zebrafish Embryos, During Early DeveloPment.. 69 3.4.3 Inhibition of Parthenogenetic Activation of Ovulated Zebrafish ......70 Oocytes...... 3.4.4Oocyte Injection as an Efficient Route to Producing Transgenic Zebrafish........ 72 3.4.5 Sperm Mediated Transfer of Novel Genes in Medaka Oryziøs latipes..74 DISCUSSION.... 3.s .......76 MANIPULATION........ 4.0 PARTIAL GENOME .............. 94 4.1 INTRODUCTION 94 4.2 CHIMERIC METHODS 95 4.2.1- Fish Species..... 95 4.2.2 Supply of Embryos... 95 4.2.3 Micromanipulation for Production of Chimeras ... 95 4.2.3.1 Micromanipulation System .95 4.2.3.2 Manipulation Pipettes .'. .96 4.2.4 Melhodolo gy of Micromanipulation.......'....... 97 4.2.5 Manipulation media. 97 4.3 STATISTICAL ANALYSIS.............. 97 4.4 EXPERIMENTAL............... 98 4.4.1,Detection of Inter-Specific Chimeras of the Genus Danio, During Early Development............ 98 Outline....... """""""'98 4.4.1,.1, 4.4.1,.2Results """""""""""99 4.4.2Conlribution of Transplanted Blastomeres in Adult Chimeras..........100 Ourline....... .............100 4.4.2.L 4.4.2.2Results """""""""" 100 4.4.3 Efficient Production of Inter-specific Chimeras using Cleavage Donors Advanced Embryos as ..............'..'.' 101 4'4'3'1' outline"""' """"""'101 4.4.3.2Results """""""""" 102 4.4.4Suwival and Subsequent Development of Manipulated Chimeric embryos.. 4.4.4.1. Outline.... ". 4.4.4.2Results ....................103 4.s DTSCUSSION.... ..... L04 5.0 INDUCTION OF TETRAPLOIDY IN THE ZEBRAFISH RERIO .-.\24 DANIO INTRODUCTION """""""""'124 5.L METHODS............... s.2 PLOIDY MANIPULATION ...................1.25 r25 5.2.L Heat Shock treatment..... 5.2.2 Analysis of ploidY 126 4N4LYSES............... .""'126 5.3 STATISTICAL PROCEDURES... s.4 EXPERIMENTAL .......T27 5.4.1, P ar ameters for temperature induced tetraploid y in zebt afish .... -. -. - -.. 127 Outline""." """"""'127 5.4.1..1. 5.4.1.2Results """"""""""127 tetraploidy...... 5.4.2Cleavage rate as a gauge of incidence of ....L28 S. .Z.1 Outline....... .............128 5.4.2.2Results """"""""""L29 ........... 5.4.3 Maximising survival of tetraploids """"" 130 Outline....... .............130 5.4.g.1. Results ....................13L 5.4.3.2 5.4.4 Survival and viability of Tetraploids.......... 131 5.4.4.1. Outline....... ......................... 131 5.4.4.2Results """""""""" 131 DISCUSSION.... .....132 s.s DISCUSSION .I44 6.0 GENERAL BIBLIOGRAPHY L50 vl LIST OF TABLES AND FIGURES vector...... Figure 2.1The organization of the pGl2-control ..................56 embryos.. Table 3.1 Sperm mediated transgenesis in zebrafish .........8L Table 3.2 Transgenesis in F0 and Fl zebrafish resulting from sperm mediated transfer... """""""""82 Table 3.3 Sequential expression of luciferase by zebrafish embryos.................83 Table 3.4 Effect of sperm concentration on inhibition of parthenogenetic activation of oocytes 84 Table 3.5 Fertilisability normality and survival of embryos following transgenes........... microinjection of .......85 Table 3.6 Comparative levels of expression of pGL2 injected into either 2ygotes............... oocytes or .....................86 Table 3.7 Incidence of transgenesis in F0 and FL generations resulting from iniection............... zygote and oocyte .....87 Table 3.8 Introduction of transgenes into medaka embryos; survival and rate.... transgenesis ..................88 Figure 3.L Sequential expression of luciferase by zebrafish embryos..................89 Figure 3.2Inhibition of oocyte activation; effect of sperm concentration on fertilisability..... subsequent ..----............90 Figure 3.3 Luciferase expression by embryos injected at either the oocyte or zygote stage. 9r vll Table 4.1 Embryo survival and frequency of pigmented chimeras following transfer blastomere """""""'107 Table 4.2 Survival to maturity of inter-specific chimeric embryos....................108 Table 4.3 Production of chimeras resulting from the use of advanced embryos as a source donor blastomeres............ L09 Table 4.4 Effect of donor cell-number on survival of chimeras.........................11'0 Table 4.5 Comparison of overall survival and deformity observed in embryos groups..... from different treatment ""'111 Table 5.1 Survival of zebrafish embryos following heat shock (HS)................136 zebrafish.......... Table 5.2 Induction of tetraploidy in """"137 Table 5.3 Frequency of tetraploid zebrafish in normal and abnormal embryos treatment........... following HS """"""'L38 status.. Table 5.4 Cleavage rate as an indicator of tetraploid .............139 Table 5.5 Effect of duration of HS on induction and normal survival of tetraploids............... ."""""""L40 tetraploidy......... Figure 5.1 Normal survival a/s induced ...141 zebrafish Figure 5.2 Survival of tetraploid """""'142 vlll LIST OF PLATES Plate 1.1 Species of fish used for this study xxll plate 3.L Detection of the pGL2 transgene in fins of adult putative transgenic zebrafish ..,..,.....92 latipes Plate 3.2 Sperm mediated gene transfer in medaka o. .........93 Plate 4.1 Removal of blastomeres from donor embryos 112 Plate 4.2 lnjection of donor blastomeres into recipient embryos................... LL3 Plate 4.3 Chimeric manipulations: Control embryos at 36h of developmentLL4 Plate 4.4 Chimeric manipulations: Chimeric embryo at 36h 1.1.5 Plate 4.5 Chimeric manipulations: Control embryos at 48h 116 Plate 4.6 Chimeric manipulations: Chimeric embryos at 48h........,..,...,.""""117 Plate 4.7 Chimeric manipulations: Control embryos at 55h LL8 Plate 4.8 Chimeric manipulations: chimeric embryos at 55h......................... L19 Plate 4.9 Chimeric manipulations: Control adult fish 120 Plate 4.L0 Chimeric manipulations: LD-ZD adult chimera L (male) .............121 Plate 4.L1 Chimeric manipulations: LD-ZD adult chimera 2 (female).........,122 IX Plate 4.L2 Chimeric manipulations: LD'ZD adult chimera 3 (male) 123 Plate 5.1. Zebrafish embryos resulting after HS induced tetraploidy............t43 x
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