OBJECTIVE: To describe histological and ultrastructural changes of cardiomyocytes in experimental rats following subplantar administration of carrageenin. MATERIAL AND METHODS: In adult rats, an acute inflammatory reaction was induced by subplantar injection of 0.1 ml of 1% sterile carrageenin solution. In a total of 10 rats, which developed gangrene of tails in 5- to 12-cm-long segments, were killed and their internal organs fixed in 10% formaldehyde solution and subsequently processed for paraffin embedding. Later, blocks of the ventricular heart tissue were refixed and reprocessed for Araldite embedding and ultrastructure observation. Similarly, the cardiac muscle of control, carrageenin-injected rats which did not develop vascular thrombosis was processed. RESULTS: The cardiomyocytes of rats injected with carrageenin showed focal dystrophic alterations, enlarged mitochondria with densely packed concentrically oriented cristae, and many dense and irregularly shaped deposits with microgranular helicoid organization. Normal cardiomyocytes were observed in control rats. Complicating thrombosis of tail blood vessels leading to extensive tail necroses were also histologically confirmed. CONCLUSION: These findings demonstrate specific pathogenic effect in the cardiovascular system of the carrageenin-treated rats. 2007 S. Karger AG, Basel
- MeSH
- karagenan aplikace a dávkování škodlivé účinky MeSH
- kardiomyocyty účinky léků ultrastruktura MeSH
- krysa rodu rattus MeSH
- modely nemocí na zvířatech MeSH
- nekróza MeSH
- ocas fyziologie patologie MeSH
- potkani Wistar MeSH
- trombóza chemicky indukované patologie MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- srovnávací studie MeSH
- MeSH
- finanční podpora výzkumu jako téma MeSH
- hyperoxie etiologie patofyziologie MeSH
- karagenan aplikace a dávkování škodlivé účinky MeSH
- krysa rodu rattus MeSH
- modely nemocí na zvířatech MeSH
- pneumonie patofyziologie MeSH
- tyrosin analogy a deriváty krev škodlivé účinky MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- zvířata MeSH
Jednojadrové akva-(aryloxyacetáto)zinočnaté komplexy zloženia [Zn(H2O)2(ROCH2COO)2] (R =fenyl, o-, m-, p-tolyl) boli pripravené ako potenciálne protizápalovo účinné látky. Výsledky elemen-tárnej analýzy a parametre IČ spektier dovolili uvedené zlúčeniny zaradiť do skupiny karboxyláto-zinočnatých komplexov s deformovane oktaedrickou štruktúrou. Antiedematózna aktivitaakvakomplexov bola hodnotená na karagenínovom opuchu na potkanoch a ich účinky boli porovná-vané s príslušnými voľnými kyselinami. Kyselina salicylová a jej Zn(II)- a Cu(II)-soli, boli použitéako porovnávacie štandardy. Všetky zlúčeniny boli aplikované i.p. v jednorazovej dávke 50 mmol/kg(počítané na karboxylátový fragment). Vo všeobecnosti Zn(II)-komplexy boli účinnejšie (vyjadrenéako miera redukcie edému 58 – 70 – 68 – 59 %), vrátane dihydrátu salicylanu zinočnatého (64 %),ako nekomplexované kyseliny (37 – 26 – 50 – 48 %). Aktivita tetrahydrátu salicylanu meďnatého(60 %) a kyseliny salicylovej (57 %) je za tých istých podmienok porovnateľná. Zistená aktivitakomplexov je diskutovaná vo vzťahu k ich štruktúre a ku koordinačno-chemickým vlastnostiamštudovaných acidoligandov.
Mononuclear aqua(aryloxyacetato)zinc(II) complexes of the composition [Zn(H2O)2(ROCH2COO)2](R = phenyl, o-, m-, p-tolyl) were prepared as potential anti-inflammatory agents. The results ofelemental analysis and parameters of IR spectra allow to classify the above-mentioned compoundsto the group of carboxylatozinc(II) complexes with a distorted octahedral structure. They wereassayed in rat paw carrageenan-induced edema and antiedematous effects were compared to thoseof free acids. Salicylic acid and its zinc(II) and copper(II) salts were used as the standards ofcomparison. All compounds were administered i.p. in a single dose of 50 mmol/kg body weight(calculated for the carboxylate fragment). In general, the zinc(II) complexes tested were clearly moreeffective (expressed as a mean edema reduction of 58 – 70 – 68 – 59 %), including zinc(II) salicylatedihydrate (64 %), than the uncomplexed acids (37 – 26 – 50 – 48 %). Copper(II) salicylate tetrahyd-rate (60 %) and salicylic acid (57 %) exhibited comparable effects under the same conditions. Theobserved activities of the complexes are discussed in relation to their structures as well as to thecoordination-chemical properties of the acidoligands under study.
- MeSH
- antiflogistika terapeutické užití MeSH
- edém chemicky indukované terapie MeSH
- karagenan škodlivé účinky toxicita MeSH
- krysa rodu rattus MeSH
- kyseliny karboxylové analýza chemie MeSH
- měď chemie MeSH
- sloučeniny zinku analýza chemická syntéza terapeutické užití MeSH
- spektrofotometrie infračervená metody využití MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- zvířata MeSH
