Conductance rise induced by the calcium ionophore A23187 in unfertilized eggs of tilapia
Current-clamp measurements on unfertilized tilapia eggs gave linear current-voltage relations in the range 0 to -120 mV. Eggs had low resting potentials (-22 mV) and high specific membrane resistances (500 k omega cm2) and specific membrane capacitances (0.9 microF cm-2) indicating no marked folding...
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| Veröffentlicht in: | Experimental physiology 1991-07, Vol.76 (4), p.619-622 |
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| container_title | Experimental physiology |
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| creator | House, CR |
| description | Current-clamp measurements on unfertilized tilapia eggs gave linear current-voltage relations in the range 0 to -120 mV. Eggs
had low resting potentials (-22 mV) and high specific membrane resistances (500 k omega cm2) and specific membrane capacitances
(0.9 microF cm-2) indicating no marked folding of their plasma membrane. Application of A23187 induced a small depolarization
and a conductance rise, the response having a reversal potential of about -16 mV. The results suggest that tilapia eggs have
a calcium-gated conductance probably activated at fertilization. |
| doi_str_mv | 10.1113/expphysiol.1991.sp003531 |
| format | Article |
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had low resting potentials (-22 mV) and high specific membrane resistances (500 k omega cm2) and specific membrane capacitances
(0.9 microF cm-2) indicating no marked folding of their plasma membrane. Application of A23187 induced a small depolarization
and a conductance rise, the response having a reversal potential of about -16 mV. The results suggest that tilapia eggs have
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had low resting potentials (-22 mV) and high specific membrane resistances (500 k omega cm2) and specific membrane capacitances
(0.9 microF cm-2) indicating no marked folding of their plasma membrane. Application of A23187 induced a small depolarization
and a conductance rise, the response having a reversal potential of about -16 mV. The results suggest that tilapia eggs have
a calcium-gated conductance probably activated at fertilization.</description><subject>Animals</subject><subject>Calcimycin - pharmacology</subject><subject>Calcium - metabolism</subject><subject>Electric Conductivity - drug effects</subject><subject>Female</subject><subject>Ion Channels - physiology</subject><subject>Membrane Potentials - drug effects</subject><subject>Ovum - physiology</subject><subject>Perciformes</subject><subject>Tilapia</subject><issn>0958-0670</issn><issn>1469-445X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1991</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkM-L1DAUx4Mo67j6Jwg5iZeO-Z3muAyrKyzoQWFvIc28TCOdpiYta_3rbenK3MTT4733-b6QD0KYkj2llH-AX8PQziWmbk-NofsyEMIlp8_QjgplKiHkw3O0I0bWFVGavESvSvlBCOWkFlfoimqqDJM79HBI_XHyo-s94BwL4Lj2cMTNjMcWsHedj9MZx9SnoU0Z8A3jtNYLh6c-QB5jF38vPJxOBaeAl94N0b1GL4LrCrx5qtfo-8fbb4e76v7Lp8-Hm_vKC2ZMpUPtag7OG22EMQy0YpRIGZgJIRyVrlnDJONGeFd7E3xDJNdEB820UNDwa_Ruuzvk9HOCMtpzLB66zvWQpmI1o1Qywhfw_T9BqhThRksmFrTeUJ9TKRmCHXI8uzxbSuzq317829W__et_ib59emVqznC8BDfhy_6w7R9jB_N_37W3X-_WgVZCUXP5dBtP7WPMYLdUST7COFutrLAr-Ac2zqcv</recordid><startdate>19910701</startdate><enddate>19910701</enddate><creator>House, CR</creator><general>The Physiological Society</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QP</scope><scope>7X8</scope></search><sort><creationdate>19910701</creationdate><title>Conductance rise induced by the calcium ionophore A23187 in unfertilized eggs of tilapia</title><author>House, CR</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4299-7f8a83eac9794992e7621055f29fffd6782b252394ca8c9fcb053707f72746eb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1991</creationdate><topic>Animals</topic><topic>Calcimycin - pharmacology</topic><topic>Calcium - metabolism</topic><topic>Electric Conductivity - drug effects</topic><topic>Female</topic><topic>Ion Channels - physiology</topic><topic>Membrane Potentials - drug effects</topic><topic>Ovum - physiology</topic><topic>Perciformes</topic><topic>Tilapia</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>House, CR</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Experimental physiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>House, CR</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Conductance rise induced by the calcium ionophore A23187 in unfertilized eggs of tilapia</atitle><jtitle>Experimental physiology</jtitle><addtitle>Exp Physiol</addtitle><date>1991-07-01</date><risdate>1991</risdate><volume>76</volume><issue>4</issue><spage>619</spage><epage>622</epage><pages>619-622</pages><issn>0958-0670</issn><eissn>1469-445X</eissn><abstract>Current-clamp measurements on unfertilized tilapia eggs gave linear current-voltage relations in the range 0 to -120 mV. Eggs
had low resting potentials (-22 mV) and high specific membrane resistances (500 k omega cm2) and specific membrane capacitances
(0.9 microF cm-2) indicating no marked folding of their plasma membrane. Application of A23187 induced a small depolarization
and a conductance rise, the response having a reversal potential of about -16 mV. The results suggest that tilapia eggs have
a calcium-gated conductance probably activated at fertilization.</abstract><cop>England</cop><pub>The Physiological Society</pub><pmid>1716925</pmid><doi>10.1113/expphysiol.1991.sp003531</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0958-0670 |
| ispartof | Experimental physiology, 1991-07, Vol.76 (4), p.619-622 |
| issn | 0958-0670 1469-445X |
| language | eng |
| recordid | cdi_proquest_miscellaneous_72115203 |
| source | Wiley-Blackwell Journals; MEDLINE; Alma/SFX Local Collection |
| subjects | Animals Calcimycin - pharmacology Calcium - metabolism Electric Conductivity - drug effects Female Ion Channels - physiology Membrane Potentials - drug effects Ovum - physiology Perciformes Tilapia |
| title | Conductance rise induced by the calcium ionophore A23187 in unfertilized eggs of tilapia |
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