Effects of oxytocin on cervical and uterine connective tissue

1984 ◽  
Vol 106 (2) ◽  
pp. 271-276 ◽  
Author(s):  
Ingrid Wiqvist ◽  
Anders Norström ◽  
Nils Wiqvist
Keyword(s):  
Connective Tissue ◽  
Pregnant Women ◽  
Inhibitory Effect ◽  
Lower Uterine Segment ◽  
Collagen Metabolism ◽  
Clinical Experiences ◽  
Experimental Conditions ◽  
Tissue Metabolism ◽  
Connective Tissue Metabolism

Abstract. The effect of oxytocin on collagen metabolism in the cervix and lower uterine segment of pregnant women was studied by measuring the incorporation of [3H]proline in vitro. Oxytocin had a concentration related inhibitory effect on the labelling with [3H]proline. Addition of indomethacin did not influence the response to oxytocin indicating that the effect was not directly mediated by prostaglandins. Oestradiol-17β potentiated the effect of oxytocin. Vasopressin decreased the incorporation of [3H]proline slightly but the action of this hormone was significantly less than that of oxytocin. The results suggest that oxytocin under in vitro experimental conditions influences cervical connective tissue metabolism which is in contrast to current clinical experiences.

Regulatory influence of relaxin on human cervical and uterine connective tissue

1984 ◽  
Vol 106 (1) ◽  
pp. 127-132 ◽  
Author(s):  
Ingrid Wiqvist ◽  
Anders Norström ◽  
Elizabeth O'Byrne ◽  
Nils Wiqvist
Keyword(s):  
Amino Acid Uptake ◽  
Inhibitory Effect ◽  
Lower Uterine Segment ◽  
Prostaglandin E ◽  
Similar Response ◽  
Acid Uptake ◽  
Experimental Conditions ◽  
Inverse Effect ◽  
Proline Incorporation

Abstract. Cervical tissue was obtained from women undergoing legal abortion in the 7th–15th week of gestation and tissue from the lower uterine segment was excised at elective Casearean section in the 38th–40th week. The specimens were incubated with [3H]proline in the presence of relaxin or prostaglandin E2 (PGE2). Relaxin had a concentration related inhibitory effect on the radiolabelling in the 7th–9th week but failed to influence the amino acid uptake in the 10th–15th week of pregnancy. PGE2 had the inverse effect, i.e. no influence in the former group but reduced incorporation of proline in the latter group of patients. Incubation of tissue from the lower uterine segment showed a similar response as that of the early pregnant cervix. It is concluded that relaxin has a significant influence on [3H]proline incorporation by cervical and uterine tissue under in vitro experimental conditions.

scholarly journals FEATURES OF CONNECTIVE TISSUE METABOLISM AND MICROELEMENTS IN BLOOD SERUM OF PREGNANT WOMEN WITH CERVICAL INSUFFICIENCY

2018 ◽  
Vol 6 ◽  
pp. 30-36
Author(s):  
Sadrudin Magomedov ◽  
Iryna Zhabchenko ◽  
Viktor Oleshko ◽  
Larysa Polishchuk ◽  
Nellia Korniets ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Blood Serum ◽  
Pregnant Women ◽  
Type I ◽  
Cervical Insufficiency ◽  
Tissue Metabolism ◽  
Amino Terminal ◽  
Connective Tissue Dysplasia ◽  
Connective Tissue Metabolism ◽  
First Time

The preterm deliveries are the leading cause of the perinatal morbidity and represent important mortality indicators. Functional cervical insufficiency, which is a phenotypic manifestation of undifferentiated connective tissue dysplasia, plays the main role in the development of pregnancy complications in primigravidas (women pregnant for the first time) and primiparas (women giving birth for the first time). Aim of the research: to study the indicators of connective tissue metabolism and basic microelements in order to determine the role of undifferentiated connective tissue dysplasia in the pathogenesis of functional cervical insufficiency during pregnancy. Methods. The 101 pregnant women (the main group) at the 22–32 week gestation period which were diagnosed with “Functional cervical insufficiency” were examined, as well as 34 pregnant women with the physiological obstructive function of the cervix (the control group). Utilizing immunoenzyme analysis we measured in blood serum the concentration of Total P1NP the amino-terminal propeptide of procollagen type I a marker of synthesis, and β-CrossLaps resorptions marker of the connective tissue. Utilizing the automatic analyzer of electrolytes and a set of reagents for their determination we estimated the content of microelements Na+, K+, Mg2+, Ca2+ and total Ca and P. Results. The functional cervical insufficiency in pregnant women was indicated by cervical shortening up to 22.88±1.02 mm, and the majority of women (76.2 %) had phenotypical manifestations of undifferentiated connective tissue dysplasia. We found a significant increase in the concentration of marker of synthesis Total P1NP, whereas the concentration of resorption marker β-CrossLaps remains normal, and strong reverse correlation (r=–0.7362) between the index of cervix length and concentration of marker of connective tissue synthesis Total P1NP. We detected a significant increase in the concentration of total and ionized calcium, total phosphorus, deficiency of ionized magnesium, potassium and sodium that lead to changes in the structure of connective tissue and reduction of cervical obstructive function.

scholarly journals CONNECTIVE TISSUE SYNTHESIS BY SCLERODERMA SKIN FIBROBLASTS IN CELL CULTURE

1972 ◽  
Vol 135 (6) ◽  
pp. 1351-1362 ◽  
Author(s):  
E. Carwile Leroy
Keyword(s):  
Connective Tissue ◽  
Fibroblast Cell ◽  
Skin Fibroblasts ◽  
Anatomic Site ◽  
Glycoprotein Synthesis ◽  
Tissue Metabolism ◽  
Donor Skin ◽  
Connective Tissue Metabolism ◽  
And Control

Skin fibroblasts from subjects with scleroderma and control subjects were grown in tissue culture to compare the characteristics of connective tissue metabolism. A striking increase in soluble collagen (media hydroxyproline) was observed in eight of nine scleroderma cultures when they were compared with identically handled control cultures matched for the age and sex of the donor and the anatomic site of the donor skin. Glycoprotein content as estimated by hexosamine and sialic acid was also significantly increased in the scleroderma cultures. Estimations of protein-polysaccharide content by uronic acid determinations were low in all cultures and not significantly increased in scleroderma cultures. This report demonstrates the feasibility of using fibroblast cell cultures to study chronic rheumatic and connective tissue disorders. The initial results suggest a net increase in collagen and glycoprotein synthesis in scleroderma fibroblast cultures. The implications of an abnormality of connective tissue metabolism by skin fibroblasts propagated in vitro in the acquired disorder scleroderma are discussed.

scholarly journals BIOCHEMICAL MARKERS OF CONNECTIVE TISSUE METABOLISM IN RATS’ BLOOD SERUM WITH EXPERIMENTAL KNEE OSTEOARTHRITIS AND THEIR DYNAMICS DURING CONSERVATIVE TREATMENT

2019 ◽  
Vol 72 (2) ◽  
pp. 193-197
Author(s):  
Kyrylo V. Makolinets ◽  
Vasyl I. Makolinets ◽  
Dmytro V. Morozenko ◽  
Kateryna V. Gliebova ◽  
Svitlana I. Danylchenko
Keyword(s):  
Laser Radiation ◽  
Conservative Treatment ◽  
Connective Tissue ◽  
Biochemical Markers ◽  
Diclofenac Sodium ◽  
Infrared Laser ◽  
Knee Joints ◽  
Glucosamine Hydrochloride ◽  
Tissue Metabolism ◽  
Connective Tissue Metabolism

Introduction: There are many methods for diagnosis and treatment of knee joints osteoarthritis in modern orthopedics. The infrared radiation is one of the most popular and effective methods though it needs experimental substantiation on rats. The aim: Experimental definition of the effectiveness of the proposed method of conservative treatment of knee joints osteoarthritis using sodium diclofenac, glucosamine hydrochloride and infrared laser radiation, on the basis of biochemical markers of connective tissue metabolism in rats. Materials and methods: Experimental studies were performed on 40 white male rats. A part of rats received infrared laser radiation in addition to diclofenac sodium and glucosamine hydrochloride. Results: Using a complex of infrared laser radiation and glucosamine hydrochloride and diclofenac sodium in conservative treatment of rats with experimentally induced knee joints osteoarthritis rats after 24 days of treatment. Treatment with the above-mentioned scheme resulted in a significant reduction in the content of glycoproteins (28.5%), chondroitin sulfates (26.1%), alkaline phosphatase activity (32.3%), and I and II fractions of glycosaminoglycans, namely chondroitin-6- (28.7%) and chondroitin-4-sulfate (40.3%). Moreover, these indicators of the studied markers approached the level of intact animals. Conclusions: Changes in biochemical markers of connective tissue in rats during experimental knee joints osteoarthritis indicated a higher efficiency of the treatment regimen with the use of low-intensity infrared laser radiation compared with exclusively drug therapy.

Expression of mRNAs related to connective tissue metabolism in rat hepatic stellate cells and myofibroblasts

2007 ◽  
Vol 58 (4) ◽  
pp. 263-273 ◽  
Author(s):  
Alena Jiroutova ◽  
Rastislav Slavkovsky ◽  
Martina Cermakova ◽  
Lenka Majdiakova ◽  
Irena Hanovcova ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Hepatic Stellate Cells ◽  
Stellate Cells ◽  
Tissue Metabolism ◽  
Connective Tissue Metabolism

scholarly journals Angiotensin II inhibits NaCl absorption in the rat medullary thick ascending limb

2004 ◽  
Vol 287 (3) ◽  
pp. F404-F410 ◽  
Author(s):  
Nicolas Lerolle ◽  
Soline Bourgeois ◽  
Françoise Leviel ◽  
Gaëtan Lebrun ◽  
Michel Paillard ◽  
...  
Keyword(s):  
Angiotensin Ii ◽  
Plasma Membranes ◽  
Inhibitory Effect ◽  
Thick Ascending Limb ◽  
Sprague Dawley ◽  
Experimental Conditions ◽  
Nacl Absorption ◽  
Medullary Thick Ascending Limb

NaCl reabsorption in the medullary thick ascending limb of Henle (MTALH) contributes to NaCl balance and is also responsible for the creation of medullary interstitial hypertonicity. Despite the presence of angiotensin II subtype 1 (AT1) receptors in both the luminal and the basolateral plasma membranes of MTALH cells, no information is available on the effect of angiotensin II on NaCl reabsorption in MTALH and, furthermore, on angiotensin II-dependent medullary interstitial osmolality. MTALHs from male Sprague-Dawley rats were isolated and microperfused in vitro; transepithelial net chloride absorption ( JCl) as well as transepithelial voltage ( Vte) were measured. Luminal or peritubular 10−11 and 10−10 M angiotensin II had no effect on JCl or Vte. However, 10−8 M luminal or peritubular angiotensin II reversibly decreased both JCl and Vte. The effect of both luminal and peritubular angiotensin II was prevented by the presence of losartan (10−6 M). By contrast, PD-23319, an AT2-receptor antagonist, did not alter the inhibitory effect of 10−8 M angiotensin II. Finally, no additive effect of luminal and peritubular angiotensin II was observed. We conclude that both luminal and peritubular angiotensin II inhibit NaCl absorption in the MTALH via AT1 receptors. Because of intrarenal angiotensin II synthesis, angiotensin II concentration in medullary tubular and interstitial fluids may be similar in vivo to the concentration that displays an inhibitory effect on NaCl reabsorption under the present experimental conditions.

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