scholarly journals DYNAMICS OF SECRETION OF PROSTAGLANDINS E2 AND D2 WITH DIBOTHRIOCHEPHALLUS DENDRITICUS (CESTODA) PLEROCERCOIDS IN RESPONSE TO EXPOSURE OF BLOOD SERUM OF BAIKAL CISCO, THE HOST

2020 ◽  
pp. 180-186
Author(s):  
Kutyrev ◽  
Olennikov ◽  
Kaschenko ◽  
Mazur
Keyword(s):  
Immune Response ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Immune System ◽  
Blood Serum ◽  
High Performance ◽  
Body Cavity ◽  
Physiological Solution ◽  
Prostaglandin D2 ◽  
High Concentrations

Parasites regulate host immune response via secretion of soluble mediators which interact in a certain way with cells and molecules of the immune system. The aim of the study was to determine changes of prostaglandins E2 и D2 content in Dibothriochephallus dendriticus plerocercoids and also in the incubation media during incubation of tapeworms with addition of blood serum from the intermediate host – Baikal cisco. D. dendriticus plerocercoids were retrieved from the host body cavity, ashed in the physiological solution and placed in incubation media. Microcolumn high-performance liquid chromatography was used to detect prostaglandins. Concentration of prostaglandins in the plerocercoid organism increased insignificantly after incubation in the Hanks’ solution with addition of blood serum, when compared with incubation in the Hanks’ solution only. Concentration of prostaglandin E2 increased significantly in the incubation media after incubation of plerocercoids in the Hanks’ solution with addition of blood serum. Prostaglandin D2 was also identified in high concentrations after 12 h and 24 h of incubation, whereas prostaglandin D2 was not quite detected during incubation in Hanks’ solution only.

scholarly journals Rifampicin and isoniazid plasma concentrations in relation to adverse reactions in tuberculosis patients: a retrospective analysis

2016 ◽  
Vol 7 (6) ◽  
pp. 239-247 ◽  
Author(s):  
L. Aït Moussa ◽  
O. El Bouazzi ◽  
S. Serragui ◽  
D. Soussi Tanani ◽  
A. Soulaymani ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Liver Injury ◽  
High Performance ◽  
Adverse Reactions ◽  
Plasma Concentrations ◽  
Drug Reactions ◽  
Normal Range ◽  
Tuberculosis Patients ◽  
High Concentrations

Objective: High concentrations of antituberculosis (anti-TB) drugs can be associated with many adverse drug reactions (ADRs). The objective of this study was to examine the plasma concentrations of rifampicin (RMP) and isoniazid (INH) in patients with and without ADRs. Methods: Concentration monitoring data of patients treated with anti-TB drugs were retrospectively analyzed from 2009 to 2011. RMP and INH plasma concentrations were measured 2 and 3 h after drug administration respectively using high-performance liquid chromatography. Results: A total of 54 out of 120 patients have experienced ADRs to anti-TB drugs. The median concentrations [interquartile range (IQR)] obtained in patients with and without ADRs were 6.7 mg/l (3.7–9.9) and 5.6 mg/l (2.9–8.6) ( p = 0.56) for RMP and 4.3 mg/l (2.3–5.3) and 3.1 mg/l (1.7–4.8) ( p = 0.04) for INH, respectively. Related median doses (IQR) were 8.7 mg/kg (8.0–10.0) and 8.6 mg/kg (6.5–9.9) ( p = 0.42) for RMP and 4.8 mg/kg (4.3–5.0) and 4.0 mg/kg (2.8–5) ( p < 0.01) for INH, respectively. Concentrations above the expected range in patients with and without ADRs were not reached for RMP, but were 76% and 65% for INH, respectively. Correlation between concentrations and doses has not been established for RMP or INH. In addition, high INH concentrations showed no association with sex, age, liver injury or renal or diabetes. Conclusions: High INH concentrations were common in patients with and without ADRs whereas RMP concentrations were low or within the normal range in most patients. Further studies are required to assess the association between high INH concentrations and the occurrence of ADRs.

Regional differences in catecholamine concentrations in bovine ovaries analysed by high-performance liquid chromatography

1991 ◽  
Vol 129 (2) ◽  
pp. 221-226 ◽  
Author(s):  
P. A. Denning-Kendall ◽  
M. L. Wild ◽  
Wathes D. C.
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Molar Ratio ◽  
Corpora Lutea ◽  
Wet Weight ◽  
High Concentrations ◽  
Highly Correlated ◽  
Very High

ABSTRACT Bovine corpora lutea and ovarian stroma were analysed by high-performance liquid chromatography for catecholamine content. High concentrations (up to 102 nmol/g wet weight) were found in both 'central' stroma, containing many blood vessels, and 'peripheral' stroma. Central stroma contained noradrenaline and some dopamine, whereas peripheral stroma contained a higher proportion of dopamine and also significant amounts of 3,4-dihydroxyphenylacetic acid (DOPAC). Occasional samples of stroma had very high amounts of dopamine, suggesting that it is stored in specific regions. Corpora lutea, although devoid of direct innervation, contained dopamine (up to 5·3 nmol/g) and noradrenaline (up to 1·2 nmol/g). The average dopamine: noradrenaline molar ratio was 1·19 : 1 and the concentrations of dopamine and noradrenaline were highly correlated (P < 0·002). The concentration of dopamine was significantly higher in the early luteal phase of the oestrous cycle than during the rest of the cycle or in pregnancy. The levels of noradrenaline and dopamine present in corpora lutea are sufficient to modulate the production of both oxytocin and progesterone by luteal cells in vitro. Journal of Endocrinology (1991) 129, 221–226

Year-round presence of high levels of plasma antifreeze peptides in a temperate fish, ocean pout (Macrozoarces americanus)

1985 ◽  
Vol 63 (3) ◽  
pp. 488-493 ◽  
Author(s):  
Garth L. Fletcher ◽  
Choy L. Hew ◽  
Xiaomao Li ◽  
Katsuji Haya ◽  
Ming H. Kao
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
New Brunswick ◽  
Annual Cycle ◽  
High Performance ◽  
Seasonal Cycles ◽  
High Concentrations ◽  
Temperate Fish ◽  
Antifreeze Peptides ◽  
Antifreeze Activity

The annual cycle of plasma antifreeze activity and Na+ and Cl− concentrations were measured in Newfoundland and New Brunswick ocean pout (Macrozoarces americanus) maintained in the laboratory under Newfoundland conditions of water temperature and photoperiod. The Na+ and Cl− concentrations and antifreeze activity showed distinct seasonal cycles in both groups of fish, with the highest values occurring during the winter. Relatively high concentrations of antifreeze peptides were present in the Newfoundland ocean pout at all times of the year. Antifreeze peptides were also present in the New Brunswick fish throughout the year; however, the concentrations found were approximately one-tenth of those observed in Newfoundland fish. A comparison of the antifreeze peptides from summer and winter samples from Newfoundland ocean pout and winter samples from New Brunswick ocean pout using high performance liquid chromatography revealed essentially identical elution profiles.

A novel pituitary protein (7B2)-like immunoreactivity is secreted by a rat phaeochromocytoma cell line (PC12)

1986 ◽  
Vol 108 (1) ◽  
pp. 151-155 ◽  
Author(s):  
H. Suzuki ◽  
A. S. Tischler ◽  
N. D. Christofides ◽  
M. Chretien ◽  
N. G. Seidah ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Cell Line ◽  
Pc12 Cell ◽  
High Performance ◽  
Gel Permeation Chromatography ◽  
Reverse Phase Hplc ◽  
Reverse Phase ◽  
Gel Permeation ◽  
High Concentrations

ABSTRACT High concentrations of a novel pituitary protein (7B2) have been shown to be present in the PC12 rat phaeochromocytoma cell line by radioimmunoassay. 7B2-like immunoreactivity (IR-7B2) was released from PC12 cells into the incubation medium in response to stimulation by a depolarizing concentration of K+, and this K+-evoked release was inhibited by Co2+, The major IR-7B2 in PC12 cell and medium appeared to be identical to that in porcine pituitary gland as judged by both gel permeation chromatography and by reverse-phase high performance liquid chromatography (HPLC). Gel permeation chromatography of extracts of cell and medium revealed two IR-7B2 peaks, the earlier eluting at a elution coefficient (Kav) of 0·30 and the later at a Kav of 0·54. In medium, over 90% of the IR-7B2 eluted as the earlier peak. Fractionation of extracts of cell and medium on reverse-phase HPLC showed three main IR-7B2 peaks eluting at 43, 44·5 and 46% acetonitrile/water with 0·1% trifluoroacetic acid. The findings suggest that IR-7B2 might be released by calcium-mediated exocytosis. J. Endocr. (1986) 108, 151–155

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