Opiate-like naloxone-reversible actions of somatostatin given intracerebrally

1978 ◽  
Vol 56 (2) ◽  
pp. 227-231 ◽  
Author(s):  
M. Rezek ◽  
V. Havlicek ◽  
L. Leybin ◽  
F. S. Labella ◽  
H. Friesen
Keyword(s):  
Opiate Receptors ◽  
Radioreceptor Assay ◽  
Tail Flick ◽  
Significant Activity ◽  
Subsequent Test ◽  
Tail Immersion ◽  
Average Latency ◽  
Releasing Factors

The latency to tail-flick response in the rat was significantly prolonged by cerebro-ventricular infusion of 1.0 μg of somatostatin (SRIF) and more so with 10.0 μg. The D-tryptophan analog was less effective than native SRIF. Pretreatment with naloxone eliminated analgesia but not seizures induced by SRIF. Recording of the EEG activity enabled determination of the specific state of the sleep–waking cycle in which the repeated tail-flick responses were tested: latency was generally longer in both control and test animals when tail immersion was performed during the state of sleep or drowsiness rather than during the awake state. Although animals receiving SRIF were less likely to fall asleep between subsequent test trials, the average latency was actually longer than after control saline infusion when the animals slept more. SRIF, unlike other releasing factors and peptides tested, showed significant activity in an opiate radioreceptor assay. The blockade of SRIF action by naloxone pretreatment, along with binding of SRIF to opiate receptors in vitro, suggest opiate receptors to be involved in the mediation of analgesia observed in present study.

Determination of Extractive Value, Phytochemical Constituents and In-Vitro Anti-Urolithiatic Activity of Embelia ribes Burm. F. and Ipomea Hederacea Jacq.

2021 ◽  
pp. 3566-3570
Author(s):  
Krishn Kumar Agrawal ◽  
Nitin Agrawal ◽  
Nidhi Jadon ◽  
Kuldeep Gangwar ◽  
Swarnim Jain ◽  
...  
Keyword(s):  
Diethyl Ether ◽  
Acetone Extract ◽  
Hexane Extract ◽  
Phytochemical Analysis ◽  
Significant Activity ◽  
Embelia Ribes ◽  
Phytochemical Constituents ◽  
Result Analysis

Objective: The study was planned to investigate the extractive value and in-vitro anti-urolithiatic activity of different extracts of Embelia ribes Burn. F. and Ipomea hederacea Jacq seeds. Methods: Phytochemical analysis was undertaken to evaluate the phyto-constituents present in different extracts. The extracts were prepared by the maceration process. The in-vitro anti-urolithiatic activity was performed by dissolution and turbidity methods. Result: The extractive value of chloroform, ethanol, diethyl ether, n-hexane, acetone and water of Embelia ribes and Ipomea hederacea was found to be 2%, 2.5%, 2.5%, 2%, 1.5%, 1%w/w and 1.5%, 2%, 2.4%, 14%, 2%, 6% w/w respectively. The result of phytochemical analysis showed that aqueous, ethanolic, chloroform, diethyl ether, n-hexane and acetone extract of Embelia ribes and Ipomea hederacea have positive for alkaloids, proteins, carbohydrates, amino acids, tannins, protein, mucilage and glycoside. Moreover the result of anti-urolithiatic activity of ethanol and hexane extract of Embelia ribes and Ipomea hederacea were found to be 84.33±0.67%, 76.67±0.67%, 72.33±0.88 NTU and 73.00±1.15 NTU by dissolution and turbidity methods respectively. Conclusion: On the basis of result analysis, we can conclude that both the plants extract have anti-urolithiatic activity but ethanol and hexane extract have much significant activity than other extracts when compared to standard cystone.

THE USE OF CORTICOTROPHIN PRODUCTION BY ADENOHYPOPHYSIAL TISSUE IN VITRO FOR THE DETECTION AND ESTIMATION OF POTENTIAL CORTICOTROPHIN RELEASING FACTORS

1977 ◽  
Vol 72 (2) ◽  
pp. 187-193 ◽  
Author(s):  
JULIA C. BUCKINGHAM ◽  
J. R. HODGES
Keyword(s):  
Dose Response ◽  
Posterior Pituitary ◽  
Hypothalamic Extract ◽  
Detection And Estimation ◽  
Releasing Factors ◽  
The Many ◽  
Acth Release

SUMMARY The cytochemical assay for ACTH has been adapted into a method for the detection and determination of potential corticotrophin releasing factors. Of the many putative transmitter substances tested, only the posterior pituitary polypeptides resembled hypothalamic extracts in causing dose-related increases in both pituitary ACTH content and release. Vasotocin was the most active of the compounds studied and, unlike the vasopressins, its dose–response relationships closely resembled those of hypothalamic extracts. The increase in ACTH release induced by hypothalamic extract or vasopressin was reduced by corticosterone, cortisol or progesterone but not by testosterone or oestradiol, but the increase in pituitary ACTH content was not affected by any of these steroids.

scholarly journals Evaluation of in vitro anthelmintic activity of extracts of jasminum sessiliflorum

2019 ◽  
Vol 10 (3) ◽  
pp. 2542-2544
Author(s):  
Ruby Philip ◽  
Kathiresan Krishnasamy ◽  
Elessy Abraham
Keyword(s):  
Anthelmintic Activity ◽  
Ethanolic Extract ◽  
Significant Activity ◽  
Standard Drug ◽  
Death Time ◽  
Ancient People ◽  
Ancient Times ◽  
The Common

Plant preparations are most popular from ancient times for the treatment of various diseases. The ancient people had an appreciable on the application and usage of plant preparations for the common ailments. Based on the investigation, it has been found that various species of this plant has been used as an anthelmintic. The extracts of Jasminum sessiliflorum was investigated for anthelmintic potential using earthworms, Pheretima posthuma. Different concentration of plant extracts were used for the evaluation. Albendazole (10 mg/ml) was used as reference standard drug. The method employs the determination of paralysis time and death time of the worms and these results were recorded. Extracts showed significant activity. The ethanolic extract was found to be most efficient.

Determination of in vitro „anti-aging„-effects of Ganoderma pfeifferi

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
W Jülich ◽  
J Pörksen ◽  
H Welzel ◽  
U Lindequist
Keyword(s):  
Aging Effects

In vitro determination of the skin anti-aging potential of eleven South African plants

Planta Medica ◽  
2013 ◽  
Vol 79 (13) ◽  
Author(s):  
GN Ndlovu ◽  
G Fouche ◽  
W Cordier ◽  
V Steenkamp ◽  
M Tselanyane
Keyword(s):  
South African ◽  
South African Plants ◽  
African Plants

A Molecular Approach to Immunoscintigraphy: A Study of the T-Antigen Conformation on the Surface of Tumors

1987 ◽  
Vol 26 (01) ◽  
pp. 1-6 ◽  
Author(s):  
S. Selvaraj ◽  
M. R. Suresh ◽  
G. McLean ◽  
D. Willans ◽  
C. Turner ◽  
...  
Keyword(s):  
Monoclonal Antibodies ◽  
Tumor Cell ◽  
T Antigen ◽  
Human Carcinomas ◽  
Animal Tumor ◽  
Synthetic Antigens

The role of glycoconjugates in tumor cell differentiation has been well documented. We have examined the expression of the two anomers of the Thomsen-Friedenreich antigen on the surface of human, canine and murine tumor cell membranes both in vitro and in vivo. This has been accomplished through the synthesis of the disaccharide terminal residues in both a and ß configuration. Both entities were used to generate murine monoclonal antibodies which recognized the carbohydrate determinants. The determination of fine specificities of these antibodies was effected by means of cellular uptake, immunohistopathology and immunoscintigraphy. Examination of pathological specimens of human and canine tumor tissue indicated that the expressed antigen was in the β configuration. More than 89% of all human carcinomas tested expressed the antigen in the above anomeric form. The combination of synthetic antigens and monoclonal antibodies raised specifically against them provide us with invaluable tools for the study of tumor marker expression in humans and their respective animal tumor models.

Storage of Human Blood Platelets

1974 ◽  
Vol 32 (02/03) ◽  
pp. 405-416 ◽  
Author(s):  
M. R Hardeman ◽  
Carina J L. Heynens
Keyword(s):  
Storage Temperature ◽  
Platelet Rich Plasma ◽  
Blood Platelets ◽  
Storage Period ◽  
Serotonin Uptake ◽  
Hypotonic Shock ◽  
Glycolytic Intermediates

SummaryStorage experiments were performed at 4°, 25° and 37° C with platelet-rich plasma under sterile conditions. In some experiments also the effect of storing platelets at 4° C in whole blood was investigated.Before, during and after three days of storage, the platelets were tested at 37° C for their serotonin uptake and response to hypotonic shock. In addition some glycolytic intermediates were determined.A fair correlation was noticed between the serotonin uptake and hypotonic shock experiments. Both parameters were best maintained at 25° C. Also platelet counting, performed after the storage period, indicated 25° C as the best storage temperature. Determination of glycolytic intermediates did not justify any conclusion regarding the optimal storage temperature. Of the various anticoagulants studied, ACD and heparin gave the best results as to the serotonin uptake and hypotonic shock response, either with fresh or stored platelets. The use of EDTA resulted in the lowest activity, especially after storage.The results of these storage experiments in vitro, correspond well with those in vivo reported in the literature.

DETERMINATION OF BLOOD CORTICOIDS USING THE IN VITRO RESIN UPTAKE OF 3H-PREDNISOLONE

1968 ◽  
Vol 57 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Hironori Nakajima ◽  
Mitsunori Murala ◽  
Masumitsu Nakata ◽  
Takeshi Naruse ◽  
Seiji Kubo
Keyword(s):  
Thyroid Function Test ◽  
Normal Subjects ◽  
Adrenal Function ◽  
Function Test ◽  
Before And After ◽  
Adrenal Response ◽  
Suppression Test

ABSTRACT The in vitro resin uptake of 3H-prednisolone was used for the determination of blood cortisol after addition of radioactive prednisolone followed by Amberlite CG 400 Type 1 to the test serum, and incubation of the mixture. The radioactivity of the supernatant was compared before and after the addition of the resin. The principle of this method is similar to that of the 131I-triiodothyronine resin uptake for the thyroid function test. The tests for the specificity, reproducibility and sensitivity gave satisfactory results. The mean basal value ± SD of the 3H-prednisolone resin uptake was 35.3 ± 9.2% in normal subjects, and 27.1 ± 4.8% in pregnant women. This method was valid in various adrenal function tests, i. e. the adrenal circadian rhythm, corticotrophin (ACTH) test, dexamethasone suppression test and the adrenal response to lysine-8-vasopressin. It proved to be a sensitive indicator of the adrenal function. These results suggest that this method should be useful for a routine adrenal function test.

Sign in / Sign up

Export Citation Format

Share Document