The effect of bromocriptine on mammary-gland ultrastructure of hyperprolactinemic rats

1984 ◽  
Vol 42 ◽  
pp. 204-205
Author(s):  
I.C. Murray
Keyword(s):  
Mammary Gland ◽  
Dopamine Agonist ◽  
Alveolar Epithelium ◽  
Mammary Glands ◽  
Female Rats ◽  
Control Group ◽  
Cell Hyperplasia ◽  
Once Daily ◽  
Long Evans

In women, hyperprolactinemia is often due to a prolactin (PRL)-secreting adenoma or PRL cell hyperplasia. RRL excess stimulates the mammary glands and causes proliferation of the alveolar epithelium. Bromocriptine, a dopamine agonist, inhibits PRL secretion and is given to women to treat nonpuerperal galactorrhea. Old female rats have been reported to have PRL cell hyperplasia or adenoma leading to PRL hypersecretion and breast stimulation. Herein, we describe the effect of bromocriptine and consequently the reduction in serum PRL levels on the ultrastructure of rat mammary glands.Female Long-Evans rats, 23 months of age, were divided into control and bromocriptine-treated groups. The control animals were injected subcutaneously once daily with a 10% ethanol vehicle and were later divided into a normoprolactinemic control group with serum PRL levels under 30 ng/ml and a hyperprolactinemic control group with serum PRL levels above 30 ng/ml.

scholarly journals Modulatory Effect of Fermented Papaya Extracts on Mammary Gland Hyperplasia Induced by Estrogen and Progestin in Female Rats

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Zhenqiang You ◽  
Junying Sun ◽  
Feng Xie ◽  
Zhiqin Chen ◽  
Sheng Zhang ◽  
...  
Keyword(s):  
Mammary Gland ◽  
Oxidative Dna Damage ◽  
Mammary Glands ◽  
Estradiol Benzoate ◽  
Female Rats ◽  
Control Group ◽  
High Dose ◽  
Protective Effects ◽  
Treatment Groups ◽  
Group A

Fermented papaya extracts (FPEs) are obtained by fermentation of papaya by Aspergillus oryzae and yeasts. In this study, we investigated the protective effects of FPEs on mammary gland hyperplasia induced by estrogen and progestogen. Rats were randomly divided into 6 groups, including a control group, an FPE-alone group, a model group, and three FPE treatment groups (each receiving 30, 15, or 5 ml/kg FPEs). Severe mammary gland hyperplasia was induced upon estradiol benzoate and progestin administration. FPEs could improve the pathological features of the animal model and reduce estrogen levels in the serum. Analysis of oxidant indices revealed that FPEs could increase superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities, decrease malondialdehyde (MDA) level in the mammary glands and serum of the animal models, and decrease the proportion of cells positive for the oxidative DNA damage marker 8-oxo-dG in the mammary glands. Additionally, estradiol benzoate and progestin altered the levels of serum biochemical compounds such as aspartate transaminase (AST), total bilirubin (TBIL), and alanine transaminase (ALT), as well as hepatic oxidant indices such as SOD, GSH-Px, MDA, and 8-oxo-2′-deoxyguanosine (8-oxo-dG). These indices reverted to normal levels upon oral administration of a high dose of FPEs. Taken together, our results indicate that FPEs can protect the mammary glands and other visceral organs from oxidative damage.

scholarly journals Fennel (Foeniculum vulgare) leaf infusion effect on mammary gland activity and kidney function of lactating rats

2019 ◽  
Vol 11 (1) ◽  
pp. 101-105
Author(s):  
NAJDA RIFQIYATI ◽  
ANA WAHYUNI
Keyword(s):  
Uric Acid ◽  
Mammary Gland ◽  
Side Effects ◽  
Kidney Function ◽  
Uric Acid Level ◽  
Acid Level ◽  
Mammary Glands ◽  
Female Rats ◽  
Foeniculum Vulgare ◽  
Treatment Groups

Abstract. Rifqiyati N, Wahyuni A. 2019. Fennel (Foeniculum vulgare) leaf  infusion effect on mammary gland activity and kidney function of lactating rats. Nusantara Bioscience 11: 101-105. Fennel (Foeniculum vulgare Mill) leaf, traditionally, is believed to have a potential in increasing and smoothing breast milk production. This study aimed to determine the effect of fennel leaf infusion on milk production and to know the side effects of its use. The material used in the research was infusion of fennel leaves (Foeniculum vulgare Mill) collected from Kopeng, Central Java. The research utilized 12 female rats each with 5 newborns off springs. The experiment was designed in Completed Random Design (CRD) with 4 treatments and 3 replications. Histological preparation of mammary glands was set using paraffin method with HE staining. Kidney function was observed through uric acid level in the blood. The results showed that the diameter of lactiferous ducts and of its lumen diameter were significantly influenced by 15 days fennel leaf infusion treatment. The largest lactiferous duct diameter observed was on P3 treatment group (452.97 ± 75.033 µm) and the smallest was observed in control groups (273.17 ± 38.746 µm). The numbers of active alveoli observed in treatment groups, i.e., in P1 (20 g/300  mL), P2 (40 g/300  mL), and P3 (60 g/300  mL), increased than inactive alveoli. The blood uric acid level observed was 4.0-4.6 mg/dl. The results suggested that the infusion of fennel leaf with a treatment dose of 60 g infusion in 300  mL distilled water administered for 15 days can significantly increase the diameter of lactiferous lumen of female rat mammary glands, and increase the diameter of the alveoli and the number of active alveolar mammary glands. Histological picture of mammary gland also showed that the female rats treated with dose of 60g infusion per 300  mL aquadest increased milk secretion and than the other treatment groups. The treatment also showed no significant side effects.  

EFFECT OF PROLACTIN INHIBITORY AGENTS ON THE ECTOPIC ANTERIOR PITUITARY AND THE MAMMARY GLAND IN RATS

1977 ◽  
Vol 85 (2) ◽  
pp. 267-278 ◽  
Author(s):  
K.-J. Gräf ◽  
R. Horowski ◽  
M. F. El Etreby
Keyword(s):  
Mammary Gland ◽  
Anterior Pituitary ◽  
Direct Action ◽  
Mammary Glands ◽  
Female Rats ◽  
Simultaneous Administration ◽  
Dopaminergic Receptors ◽  
Oestradiol Benzoate ◽  
Biological Effectiveness ◽  
Inhibitory Agents

ABSTRACT The purpose of the present study was to investigate the biological effectiveness of two highly potent prolactin (PRL) inhibitors, lisuride hydrogen maleate (LMH) and 2-Br-α-ergocryptine (CB-154), in the absence of hypothalamic factors acting directly at the level of the anterior pituitary. Hypophysectomized female rats bearing 4 transplanted pituitaries beneath the kidney capsules were treated with oestradiol benzoate (OeB) and progesterone (P) with or without simultaneous administration of LHM or CB-154 for 22 days in order stimulate or inhibit lobulo-alveolar growth of the mammary glands. In addition to the investigation of the mammary glands by DNA determination and assessment of the histological pictures, the aim of this study was directed towards the influence of the substances tested at the level of the anterior pituitary remote from the hypothalmus. In this connection the changes in the different cells within the ectopic pituitaries as revealed by immunoenzyme-cytochemical studies were investigated. The results obtained support the classical view of a neuroendocrine regulation of mammary gland growth and the importance of oestrogens, P and PRL within this system. Both ergot derivatives LHM and CB-154 were able to antagonize the stimulatory effect of OeB combined with P on the mammary gland. With regard to the mechanism of action of LHM and CB-154 it is concluded that both substances act via a direct action on dopaminergic receptors within the ectopic anterior pituitary.

CYTOCHROME OXIDASE AND SUCCINIC OXIDASE ACTIVITY IN MAMMARY GLAND MITOCHONDRIA OF LACTATING RATS

1955 ◽  
Vol 33 (1) ◽  
pp. 904-908
Author(s):  
Jules Tuba ◽  
Patricia F. Orr ◽  
G. Stuart Wiberg
Keyword(s):  
Mammary Gland ◽  
Cytochrome Oxidase ◽  
Oxidase Activity ◽  
Succinic Dehydrogenase ◽  
Female Rats ◽  
Oxidative Enzymes ◽  
Mammary Tissue ◽  
Control Group ◽  
Succinic Dehydrogenase Activity ◽  
Rat Mammary Gland

The effect of lactation on some oxidative enzymes of rat mammary gland mitochondria was examined. Cytochrome oxidase levels were nearly doubled during lactation. Succinic oxidase activity was not demonstrable in breeder female rats four days after the cessation of nursing, or in a control group (non-lactating breeder females, which had weaned their young at least four weeks previously), but during the nursing period considerable activity of the enzyme was observed. Succinic dehydrogenase activity was negligible in mitochondria during involution of rat mammary tissue. On the other hand appreciable anaerobic glycolysis occurred in the resting gland. The greatly increased metabolic activity associated with lactation is reflected in the altered behavior of some of the enzymes of rat mammary gland mitochondria.

Modeling of fibrocystic mastopathy in experiment on animals

2020 ◽  
Vol 28 (4) ◽  
pp. 429-436
Author(s):  
Svetlana A. Anisimova ◽  
Janna A. Svirina ◽  
Denis A. Maksaev
Keyword(s):  
Mammary Gland ◽  
Virgin Female ◽  
Mammary Glands ◽  
Female Rats ◽  
Fibrocystic Disease ◽  
Drug Induced ◽  
Fibrocystic Mastopathy ◽  
Hormonal Imbalance ◽  
Pathogenetic Factor ◽  
Almost All

Nowadays, hormonal imbalance is proven to be a factor that influences initiation of malignant and benign breast tumors. To study the aspects of participation of sex hormones in damage to organs and tissues, it may be necessary to model a common womens pathology fibrocystic disease of mammary glands characterized by the most pronounced effects of this pathogenetic factor, on experimental animals. Aim. To create a model of fibrocystic disease of mammary gland with the subsequent possibility of studying morphological manifestations of the disease in natural and drug-induced pathomorphism. Materials and Methods. The pathology was induced by intramuscular injection of 0.5 ml of 2% synestrol and 0.5 ml of 2.5% progesterone to virgin female rats on the 1st, 7th, 14th, 21st, 28th and 35th days of the experiment. For examination, histological preparations of inguinal mammary glands were made. The preparations were described and studied using morphometric analysis. Results. In the result of the experiment, pronounced macro- and microscopic alterations of mammary glands were found. Microscopic picture was similar to that observed in fibrocystic mastopathy in women. Almost all the morphometric parameters underwent reliable alterations in correspondence with the given pathology. Conclusion. A model of fibrocystic disease of mammary gland was obtained that may be used for further study of morphogenesis and methods of correction.

PENGARUH PEMBERIAN OKSITOSIN DAUN KATU DAN DAUN LAMPES TERHADAP SEKRESI AIR SUSU DAN GAMBARAN HISTOLOGI KELENJAR AMBING PADA MENCIT

1999 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
I.B. Rai Pidada
Keyword(s):  
Mammary Gland ◽  
Leaf Extract ◽  
Post Partum ◽  
Mammary Glands ◽  
Physiological Solution ◽  
Ocimum Sanctum ◽  
Control Group ◽  
Lactation Period ◽  
Fourth Group ◽  
And Control

A comparative study on the effect of oxytocin, extracted leaf of katu (Sauropus androgynous, Merr) and lampes (Ocimum sanctum, Linn) against secretions of milk and histologically mammary gland of mice was carried out under laboratory conditions. The study was designed by using totally 40 mice pp and divided into four groups treatment which consisted 10 females mice post partum (pp) of each group. The control group, katu (S.androginus), lampes (O. sanctum), and oxytosin were given orally 0.5 ml physiological solution, 10 mg/0.5 ml leaf extract of S. androgynus , 10 mg/0.5 ml leaf extract of O. sanctum and 0.1 IU oxytocin intramuscular, respectively. The treatment were started on day fourt to 21th of lactation period. The data were observed on day 6th, 9th, 12th, 15th, of lactation period and than on day 21th the mice were killed to prepare histologically of mammary glands. The data analyzed by ANOVA and LSD test. The result of the study showed that the secretion of the milk on the mice were not significantly different among of fourth groups. However between S. androgynous and O. sanctum group accured an increasing on secretion of milk productions. The diameter of alveolus pit of mammae lobus gland were not significantly different amongs the fourth group, but the number of alveolus of mammae lobus gland were significantly different among oxytocin, S. androgynous, and O. sanctum group and between the group of O. sanctum and control.

scholarly journals Mortality and morbidity of chronic lung disease and its morphological features in population of Semipalatinsk region

2007 ◽  
pp. 87-92
Author(s):  
G. E. Sagindikova ◽  
E. A. Kogan ◽  
T. E. Shakhanov
Keyword(s):  
Clinical Status ◽  
Alveolar Epithelium ◽  
Morphological Features ◽  
Morbidity And Mortality ◽  
Control Group ◽  
Interstitial Tissue ◽  
Cell Hyperplasia ◽  
Radiation Level ◽  
Mortality And Morbidity ◽  
Experimental Range

This work was aimed to study prevalence, morbidity, mortality and morphological features of chronic respiratory pathology (CRP) in population living for a long time at Semipalatinsk region contaminated with radioactive products. We analyzed healthcare reports on prevalence, mortality and morbidity of CRP in population of Semipalatinsk region from 1969 to 2003 and questioned 7 274 residents of Semipalatinsk region using a special ly developed screening questionnaire. The latter considered the radiation related route and clinical status of the person. We have also analysed 631 autopsy reports of died patients with CRP and archive autopsy, biopsy and resected samples from 300 patients with CRP living near the experimental range from their childhood to 2003. The resected and autopsy samples of 22 patients with CRP living at the territories with normal radiation level was the control group. The results showed a tendency to increase in morbidity and mortality of CRP in proportion of the radiation dose and neighbourhood of the living place to the experimental range. The morbidity and mortality of CPR tended to decrease in 1992–2003 when nuclear experiments were stopped. Besides of well known morphological features of CRP we found severe sclerosis of the bronchial walls and interstitial tissue, vascular injuries and haemosiderosis, neuroendocrine cell hyperplasia, dysplasia of bronchial, bronchiolar and alveolar epithelium. These facts suppose the role of radiation as etiological and pathogenic factor of CRP.

CYTOCHROME OXIDASE AND SUCCINIC OXIDASE ACTIVITY IN MAMMARY GLAND MITOCHONDRIA OF LACTATING RATS

1955 ◽  
Vol 33 (6) ◽  
pp. 904-908 ◽  
Author(s):  
Jules Tuba ◽  
Patricia F. Orr ◽  
G. Stuart Wiberg
Keyword(s):  
Mammary Gland ◽  
Cytochrome Oxidase ◽  
Oxidase Activity ◽  
Succinic Dehydrogenase ◽  
Female Rats ◽  
Oxidative Enzymes ◽  
Mammary Tissue ◽  
Control Group ◽  
Succinic Dehydrogenase Activity ◽  
Rat Mammary Gland

The effect of lactation on some oxidative enzymes of rat mammary gland mitochondria was examined. Cytochrome oxidase levels were nearly doubled during lactation. Succinic oxidase activity was not demonstrable in breeder female rats four days after the cessation of nursing, or in a control group (non-lactating breeder females, which had weaned their young at least four weeks previously), but during the nursing period considerable activity of the enzyme was observed. Succinic dehydrogenase activity was negligible in mitochondria during involution of rat mammary tissue. On the other hand appreciable anaerobic glycolysis occurred in the resting gland. The greatly increased metabolic activity associated with lactation is reflected in the altered behavior of some of the enzymes of rat mammary gland mitochondria.

THE GROWTH RESPONSES OF MAMMARY GLANDS AND OTHER TISSUES IN HYPOPHYSECTOMIZED FEMALE RATS TREATED WITH THYROXINE, INSULIN, CORTISONE, AND PREGNANT MARE SERUM GONADOTROPHIN

1960 ◽  
Vol XXXIII (II) ◽  
pp. 197-213 ◽  
Author(s):  
B. T. Donovan ◽  
Dora Jacobsohn
Keyword(s):  
Mammary Gland ◽  
Liver Weight ◽  
Mammary Glands ◽  
Female Rats ◽  
List Type ◽  
Growth Responses ◽  
Ovarian Weight ◽  
Heart Ventricles ◽  
Group 3 ◽  
The Individual

ABSTRACT The reaction of the mammary gland of the hypophysectomized rat to endogenous ovarian hormones produced under the influence of serum gonadotrophin (PMS) was studied and the effect of treatment with insulin, thyroxine, and cortisone in various combinations on the reaction examined. Changes in body weight, body length, weight of liver, and weight of heart ventricles were also followed. In hypophysectomized rats treated with PMS alone (group 1) the ovarian weight increased approximately tenfold and the hormones secreted caused vaginal cornification. Mammary growth was absent. With PMS, thyroxine and cortisone (group 2) the ovaries reacted as with PMS alone and vaginal cornification was again observed. Growth of end buds occurred in the mammary glands. The weight of the heart ventricles increased. With PMS, insulin and cortisone (group 3) ovarian weight and function was similar to that in the previous groups but the effect on the mammary gland was greater in that the size was increased, there were numerous side buds and end buds, and a few alveolar lobules. Body and liver weight was also increased. With PMS, thyroxine, insulin and cortisone (group 4) the effect on the ovaries and mammary glands was qualitatively similar to that seen in group 3 but ovarian weight was lower, and mammary growth more extensive. The rats grew in length, increased in weight, and the weight of the liver and heart ventricles was close to that of control animals. The above results support the view that the growth of the mammary gland is dependent upon the metabolic state of the individual.

THE DISTRIBUTION OF [1,2-3H]TESTOSTERONE IN THE TISSUES OF FEMALE RATS

1966 ◽  
Vol 34 (4) ◽  
pp. 491-496 ◽  
Author(s):  
D. Y. WANG ◽  
STRETTON YOUNG ◽  
R. D. BULBROOK
Keyword(s):  
Mammary Gland ◽  
Post Partum ◽  
Virgin Female ◽  
Mammary Glands ◽  
Female Rats ◽  
Pregnant Rat ◽  
Tumour Bearing ◽  
Mesenteric Fat

SUMMARY (1) The incorporation of [1,2-3H]testosterone in vivo into various tissues of virgin, pregnant, post-partum and tumour-bearing female rats was studied. (2) In virgin female rats the clearance of radioactivity from mesenteric fat, mammary gland, uterus, spleen, lung and blood was similar. This similarity in the rates of clearance of radioactivity for all the tissues examined was also found for the tissues of pregnant, post-partum, and tumour-bearing rats. (3) After the administration of [1,2-3H]testosterone different amounts of radioactivity were found in each of the tissues examined. In virgin rats the levels of incorporation were fat > uterus ≥ mammary gland > lung > blood ≥ spleen. This pattern was also obtained in post-partum and tumour-bearing animals; the tumours in the latter behaved in a similar way to normal mammary glands. In the pregnant rat, the foetus incorporated the least amount of radioactivity.

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