| evidence that mif plays a role in the development of pigmentation patterns in the frog. | a ventrally localized melanization-inhibiting factor (mif) may play an important role in the expression of dorsal-ventral pigment patterns of amphibians. in efforts to purify this putative mif, ventral skin conditioned medium (vcm) from rana forreri was partially fractionated and used to immunize mice. a monoclonal antibody that has the ability to block the activity of mif was isolated, and an immunoaffinity matrix was prepared by cross-linking the antibody to protein g-sepharose. the fraction o ... | 1995 | 7851638 |
| host defense peptides from lithobates forreri, hylarana luctuosa, and hylarana signata (ranidae): phylogenetic relationships inferred from primary structures of ranatuerin-2 and brevinin-2 peptides. | the primary structures of host-defense peptides present in frog skin secretions constitute useful molecular markers for establishing taxonomic classifications and investigating phylogenetic relationships between species within a particular genus. peptidomic analysis has led to the characterization of multiple host-defense peptides in norepinephrine-stimulated skin secretions of three species of frogs from the family ranidae: lithobates forreri (boulenger, 1883), hylarana luctuosa (peters, 1871), ... | 2014 | 24463457 |
| camp involvement in the control of corticosterone and aldosterone output in the adrenal of the frog (rana berlandieri forreri) | | 1978 | 214370 |
| secretion of melanophore-stimulating hormone (msh) in long-term cultures of pituitary neurointermediate lobes. | neurointermediate lobes from pituitaries of the frog, rana berlandieri forreri (rana pipiens, sensu lato), were maintained in organ culture in media with and without serum for up to six months. the cultured tissues were examined periodically by light microscopy and transmission electron microscopy and by bioassay of the melanophore-stimulating hormone (msh) secreted and present in the culture media. light-microscopic observations revealed a high degree of preservation of the pars intermedia at f ... | 1978 | 309795 |
| central nervous system control of mucous gland secretion from frog skin. | surface electrical stimulation of the diencephalic roof of the frog. rana berlandieri forreri, brain initiates integumental mucous gland secretion which is abolished by pithing. | 1979 | 499414 |
| localization and characterization of adrenergic receptors on frog skin melanophores. | the functional location of adrenergic binding sites was studied in frog skin melanophores by injecting norepinephrine (ne) outside and inside a melanophore. in 49 groups of cells (75% of the fields tested) iontophoretic injection of ne outside the cell caused melanosome aggregation in the target cell and/or in the field. in six cells in which a resting membrane potential was measured before and after intracellular injection (10-90 na), ne elicited no change in melanosome configuration. once the ... | 1981 | 6972704 |
| prostaglandin effects upon cyclic amp levels, corticosterone output, and aldosterone output in the adrenal of the frog, rana berlandieri forreri. | | 1982 | 220137 |
| the blood parasites of anurans from costa rica with reflections on the taxonomy of their trypanosomes. | during may 1997, specimens of 7 species of anurans, that included 5 phrynohyas venulosa laurenti, 5 rana forreri boulenger, 7 rana vaillanti brucchi, 6 eleutherodactylus fitzingeri schimdt, 4 smilisca baudinii duméril and bibron, 1 leptodactylus melanonotus, and 3 bufo marinus linneaus, from the guanacaste conservation area, costa rica were examined for blood parasites. their hematozoan fauna included intraerythrocytic and intraleukocytic icosahedral viruses, a rickettsia (aegyptianella sp.), 2 ... | 2001 | 11227883 |
| the amphibian melanization inhibiting factor (mif) blocks the alpha-msh effect on mouse malignant melanocytes. | we have found that a melanization inhibitory factor (mif) extracted from the ventral skin of rana forreri has a slight inhibitory effect on the activity levels of tyrosinase and dopachrome tautomerase in b16/f10 and cloudman s-91 murine melanoma cell lines. furthermore, this factor appears to block the effects of alpha-msh on these enzymatic activities. however, mif treatment does not affect the melanogenic action of theophylline on the same cells, suggesting that mif acts proximal to msh-mediat ... | 1996 | 9125755 |