301
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Jensen RA, Davis JL, Shnerson A. Early experience facilitates the development of temperature regulation in the cat. Dev Psychobiol 1980; 13:1-6. [PMID: 7188756 DOI: 10.1002/dev.420130102] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Thirty kittens were given a 30-min exposure to a moderately cool environment and drop in body temperature was measured. One group was tested every day from age 2 days to 21 days of age. A 2nd group was tested on Days 6-21 and a 3rd group tested only at 19 days of age. The 1st group (tested on Days 2-21) became homeothermic at an earlier age than did the other groups. The data are interpreted to indicate that early exposure to cool temperatures facilitates acquisition of temperature regulation in the cat, and that observed deficits in passive avoidance learning in young cats are not due to increased motor activity produced by a fall in body temperature.
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302
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Peisach J, Mims WB, Davis JL. Studies of the electron-nuclear coupling between Fe(III) and 14N in cytochrome P-450 and in a series of low spin heme compounds. J Biol Chem 1979; 254:12379-89. [PMID: 227893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
We have observed the nuclear modulation pattern in the envelope of electron spin echoes for various low spin paramagnetic heme proteins including cytochrome c, myoglobin hydroxide, myoglobin mercaptoethanol, and cytochrome P-450, using the three-pulse-stimulated echo method. We have also carried out similar experiments with model compounds containing either [14N]- or [15N]imidazole. In many of the compounds studied, we have been able to identify the nuclear modulation effects arising from 14N of the porphyrin ring and have been able to characterize and interpret the modulation effects due to 14N of various nitrogenous axial ligands. We have found that the heme of low spin ferric cytochrome P-450 is coordinated to a nitrogenous ligand, probably imidazole. We have also demonstrated that the remote 14N of the imidazole ligand in a [14N]imidazole-heme-NO-model compound is coupled differently than in myoglobin nitroxide, demonstrating the direct effect of the protein of metal ligand bonding.
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303
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Davis JL, Chandler DK, Riquetti P, Rogers S, Kocan KM, Ownby CL, Hudson BG, Carraway KL. Interaction of bovine platelets with bovine glomerular basement membrane. Thromb Haemost 1979; 42:1217-29. [PMID: 542930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The interaction of bovine platelets with bovine glomerular basement membrane has been studied by aggregometry, transmission and scanning electron microscopy and measurement of [3H] serotonin release. In the absence of added calcium platelets adhere to basement membrane but fail to undergo the release reaction or aggregation. In the presence of 0.2-0.5 mM calcium release of serotonin and complete aggregation of the platelets are observed when sufficient basement membrane is present. Platelets were strongly adhered to the basement membrane surface, the platelet surface in the aggregates closely following the surface of the basement membrane. Platelet morphology in aggregates with basement membrane closely resembled that of platelets from collagen-induced aggregates. Basement membrane differed from collagen in its requirement for calcium for the aggregation and release reactions. In addition purified basement membrane was 1.5-3 fold less active on a weight basis than bovine tendon collagen in promoting aggregation.
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304
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Boehme WM, Rossetto BJ, Davis JL, McCreedy JE. Low-dose insulin for diabetic nonketotic hyperosmolar coma. JAMA 1979; 242:1260. [PMID: 480536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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305
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Davis JL, Cherkin A. Memory enhancement induced in chicks by anesthetic doses of chlorpromazine. Psychopharmacology (Berl) 1979; 63:269-72. [PMID: 113813 DOI: 10.1007/bf00433560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Three experiments describe retroactive memory enhancement in chicks by chlorpromazine (CPZ), a potent membrane stabilizer at anesthetic doses. First, chicks trained on a one-trial peck suppression task under moderate aversant conditions and given 60--144 mg CPZ/kg, intraperitoneally, displayed increased memory retention 24 h later when compared with chicks given saline or 15--36 mg CPZ/kg. The second experiment confirmed the memory enhancement using a different moderate aversant on a different peck target and extended the effect to 48 h. The third experiment demonstrated the CPZ effect to be retrograde because the enhancement observed when CPZ was injected 1 min or 3 min after training did not occur when injection was delayed 4 h. One speculative interpretation of retrograde enhancement with CPZ includes the stabilization of swollen dendritic spines, which may facilitate neuronal pathways.
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306
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Davis JL, Cherkin A. Retrograde amnesia in chicks and mice induced by 3,4-dehydro-DL-proline, a proline analog. Pharmacol Biochem Behav 1979; 10:643-5. [PMID: 573897 DOI: 10.1016/0091-3057(79)90314-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
L-proline induces retroactive amnesia without causing brain seizures or isoelectric activity. 3,4-dehydro-DL-proline, a proline analog containing a double-bond in the 5-membered ring, has similar effects at a smaller dose. Three experiments describe the amnestic qualities of 3,4-dehydro-DL-proline in a chick memory paradigm, the retrograde quality of this amnesia, and its existence in a mammalian (mouse) preparation. Finally, EEG records show that chicks injected with amnestic doses of 3,4-dehydro-DL-proline do not exhibit seizure spiking or abnormal electrical activity.
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307
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308
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Davis JL, Masuoka DT, Gerbrandt LK, Cherkin A. Autoradiographic distribution of L-proline in chicks after intracerebral injection. Physiol Behav 1979; 22:693-5. [PMID: 482410 DOI: 10.1016/0031-9384(79)90233-6] [Citation(s) in RCA: 360] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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309
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Davis JL, Lewis SB, Schultz TA, Kaplan RA, Wallin JD. Acute and chronic phosphate depletion as a modulator of glucose uptake in rat skeletal muscle. Life Sci 1979; 24:629-32. [PMID: 440012 DOI: 10.1016/0024-3205(79)90161-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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310
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Davis JL, Allen TR. Alternatives in management of carcinoma of the esophagus. JOURNAL OF THE TENNESSEE MEDICAL ASSOCIATION 1979; 72:11-3. [PMID: 423574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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311
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Davis JL, Gerbrandt LK, Cherkin A. Retroactive amnesia induced in chicks by the proline analog L-baikiain, without EEG seizures or depression. Physiol Behav 1978; 21:653-8. [PMID: 570282 DOI: 10.1016/0031-9384(78)90144-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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312
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Murphy S, Davis JL, Walsh PN, Gardner FH. Template bleeding time and clinical hemorrhage in myeloproliferative disease. ARCHIVES OF INTERNAL MEDICINE 1978; 138:1251-3. [PMID: 277084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In 32 patients with myeloproliferative disorders (MPD), correlations were made among clinical observations of hemorrhagic tendency, template Ivy bleeding time, and platelet aggregation studies. Bleeding time was commonly prolonged, particularly in myelofibrosis. In two cases, this prolongation appeared to reflect a defect in platelet function, which resulted in clinical bleeding. Prolongation of bleeding time did not correlate with degree of thrombocytosis. Two patients with thrombocytosis had serious clinical bleeding at a time when bleeding time was normal. Of the patients, 35% had abnormal findings from aggregation studies, but there was no correlation between aggregation studies and prolongation of bleeding time or clinical hemorrhage. We conclude that bleeding in MPD arises either from a defect in platelet function, which is reflected in a prolonged bleeding time, or from thrombocytosis.
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313
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Davis JL, Mims WB. ENDOR cavity for electron spin echo experiments. THE REVIEW OF SCIENTIFIC INSTRUMENTS 1978; 49:1095. [PMID: 18699259 DOI: 10.1063/1.1135525] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A microwave cavity is described for performing ENDOR measurements in conjunction with electron spin echo experiments. The frequency of the cavity is approximately 9.4 GHz and the Q value approximately 80. Both of these parameters can be changed by making small alterations in the design. The radio-frequency magnetic field is confined to a small volume in order to minimize inductance and maximize the field strength obtainable for a given current. Direct measurements show the field in the sample to be approximately 11 G/A of coil current in a typical case. This corresponds to a field approximately 8 G in the rotating frame per ampere of coil current.
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314
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315
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Cherkin A, Davis JL, Garman MW. D-Proline: stereospecificity and sodium chloride dependence of lethal convulsant activity in the chick. Pharmacol Biochem Behav 1978; 8:623-5. [PMID: 674269 DOI: 10.1016/0091-3057(78)90399-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Two- and five-day old chicks were injected intraventricularly with D-proline and structurally related compounds. D-proline produced convulsions and lethality, but was non-amnestic, whereas the naturally-occurring isomer, L-proline, was non-convulsant and non-toxic but amnestic. D-proline convulsions were accompanied by decreased high frequency in the EEG and increased slow wave activity. High amplitude spiking was not observed. The lethality of D-proline was saline-dependent. Control experiments ruled out possible toxic factors such as hypertonicity, pH pyrogens, injection volume, or needle misplacement. The results demonstrate that saline and distilled water are not equivalent injection vehicles. A sodium-free vehicle may lead to artifacts but is advantageous in experiments in which amino acid transport must be minimized.
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316
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Abstract
Pseudocaloric nystagmus (PCN) is an appropriately beating nystagmus induced by cold caloric irrigation of an ear with abolished vestibular function. The nystagmus is not the result of endolymph flow but probably represents unmasking a latent nystagmus by altering the patient in this case, through tactile (caloric) stimulation. Pseudocaloric nystagmus has the following characteristics: (1) mild intensity (eyes closed-slow phase velocity usually less than 8 degrees/sec), it has not been observed with the eyes open, (2) always beats away from the diseased ear; therefore, any nystagmus induced by cold irrigation will be appropriately (contralateral) beating while that induced by warm irrigation will be inappropriately (contralateral beating; 3) the induced nystagmus will not reverse direction after inverting the ampulla. Establishing bidirectional sensitivity of the cupula by demonstrating appropriately beating nystagmus to ampullopetal and ampullofugal flow of endolymph not only assures that the lateral semicircular canal (SCC) is functionally intact to caloric stimulation but will avoid errors in electronystagmorgraphic (ENG) interpretation.
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317
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Davis JL. The role of mammography in the clinical management of diseases of the breast. JOURNAL OF THE TENNESSEE MEDICAL ASSOCIATION 1978; 71:17-8. [PMID: 625109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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318
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Rushakoff RJ, Lewis SB, Schultz TA, Kaplan RA, Davis JL, Pilkis SJ, Ho RJ, Wallin JD. Epinephrine-induced cyclic AMP production and vasoconstriction in the noncyclically perfused rat hindlimb; a possible role for insulin. Life Sci 1978; 22:61-5. [PMID: 203812 DOI: 10.1016/0024-3205(78)90412-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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319
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Gerbrandt LK, Eckardt MJ, Davis JL, Cherkin A. Retrograde enhancement of memory with fluorthyl: Electrophysiological effects in chicks. Physiol Behav 1977; 19:729-34. [PMID: 609610 DOI: 10.1016/0031-9384(77)90306-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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320
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Gerbrandt LK, Eckardt MJ, Davis JL, Cherkin A. Retrograde amnesia in neonatal chicks: induction by L-proline is not accompanied by occult seizures. Physiol Behav 1977; 19:723-8. [PMID: 565060 DOI: 10.1016/0031-9384(77)90305-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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321
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Davis JL, Lewis SB, Gerich JE, Kaplan RA, Schultz TA, Wallin JD. Peripheral diabetic neuropathy treated with amitriptyline and fluphenazine. JAMA 1977; 238:2291-2. [PMID: 199754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The pain of diabetic peripheral neuropathy responds poorly to current modes of treatment. We treated eight patients with this disorder whose pain was refractory to standard regimens but who experienced remarkable pain relief within two to five days after treatment with fluphenazine hydrochloride, amitriptyline hydrochloride, or a combination of the two. In four patients whose regimens were discontinued, pain recurred within two days and again remitted on reinstitution of the drug regimens. These findings suggest that fluphenazine alone or in combination with amitriptyline may be of benefit in treating the painful peripheral neuropathy associated with diabetes.
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322
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Anderson DR, Davis JL, Carraway KL. Calcium-promoted changes of the human erythrocyte membrane. Involvement of spectrin, transglutaminase, and a membrane-bound protease. J Biol Chem 1977; 252:6617-23. [PMID: 893431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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323
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Anderson DR, Davis JL, Carraway KL. Calcium-promoted changes of the human erythrocyte membrane. Involvement of spectrin, transglutaminase, and a membrane-bound protease. J Biol Chem 1977. [DOI: 10.1016/s0021-9258(17)39892-7] [Citation(s) in RCA: 125] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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324
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325
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Davis JL, Morris RO. The affinity of rat liver ribosome subunits for degranulated rough microsomal membranes. BIOCHIMICA ET BIOPHYSICA ACTA 1976; 443:437-42. [PMID: 963065 DOI: 10.1016/0005-2736(76)90463-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Potassium and magnesium ion concentrations affected the extent but not the specificity of binding in vitro of 60-S and 40-S ribosome subunits to degranulated rough microsomal membranes from rat liver. Scatchard plots revealed that under ionic conditions most likely to resemble those in vivo, the affinity constants for binding 60-S subunits were approximately four-times greater than those characterizing 40-S subunit binding. Further, the extent to which subunits bound at saturation was close to the level of ribosomes present in intact membranes.
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