• Title/Summary/Keyword: Hormonal

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Nanoparticles Promise New Methods to Boost Oncology Outcomes in Breast Cancer

  • Islamian, Jalil Pirayesh;Hatamian, Milad;Rashidi, Mohammad Reza
    • Asian Pacific Journal of Cancer Prevention
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    • v.16 no.5
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    • pp.1683-1686
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    • 2015
  • Different types of treatment are available for patients with breast cancer, the most being radiotherapy, chemotherapy, hormonal therapy and combination therapy. Recently, nanoparticles have been emerging as promising agents for cancer therapy and are being investigated as contrast agents, drug carriers, radiosensitizers and also for hyperthermia effects. In this review the focus is on approaches for targeted treatment of breast cancer by combining nanoparticles, chemodrugs and radiation. The availble data suggest the possibility of increased roles for combined therapy, particularly by reducing the dose of each treatment modality, and consequently minimizing related side effects.

Theoretical Approach for Physicochemical Factors Affecting Human Toxicity of Dioxins (다이옥신의 인체 독성에 영향을 미치는 물리화학적 인자에 대한 이론적 접근)

  • 황인철;박형석
    • Environmental Analysis Health and Toxicology
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    • v.14 no.1_2
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    • pp.65-73
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    • 1999
  • Dioxins refer to a family of chemicals comprising 75 polychlorinated dibenzo-p-dioxin (PCDD) and 135 polychlorinated dibenzo-p-furan (PCDF) congeners, which may cause skin disorder, human immune system disruption, birth defects, severe hormonal imbalance, and cancer. The effects of exposure of dioxin-like compounds such as PCBs are mediated by binding to the aryl hydrocarbon receptor (AHR), which is a ligand-activated transcription factor. To grasp physicochemical factors affecting human toxicity of dioxins, six geometrical and topological indices, eleven thermodynamic variables, and quantum mechanical descriptors including ESP (electrostatic potential) were analyzed using QSAR and semi-empirical AM1 method. Planar dioxins with high lipophilicity and large surface tension show the probability that negative electrostatic potential in the lateral oxygen may make hydrogen bonding with DNA bases to be a carcinogen.

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Cytotoxicity of T-2 Toxin on Primary Cultures of Rat Hepatocytes

  • Kim, Hwan-Mook;Kim, Byung-Sam;Choe, Suck-Young;Yang, Kyu-Hwan
    • Toxicological Research
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    • v.4 no.1
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    • pp.37-45
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    • 1988
  • Primary cultures of adult rat hepatocytes were used to study in vitro cytotoxic effects of T-2 toxin on liver cells. When T-2 toxin was added to the culture, a significant depression of the hormonal induction of ${\alpha}$-aminoisobutyric acid (AIB) uptake and tyrosine aminotransferase (TAT) activity was observed. However, T-2 toxin did not affect the uptake of ouabain into hepatocytes. Protein synthesis was inhibited by T-2 toxin, but RNA synthesis was not severely affected. The inhibitory effects of T-2 toxin on protein synthesis was diminished rapidly with culture time and the hepatocytes culture maintained control level of protein synthesis within 24 hrs.

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Microbiological studies on endometritis in cattle and dairy cows (소 자궁내막염에 대한 미생물학적 분포)

  • 강신석;최필규;한성태;이용희;유정희
    • Korean Journal of Veterinary Service
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    • v.21 no.1
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    • pp.21-27
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    • 1998
  • In order to investigate reproductive disorder in dairy cows, 312 uterine from abattroirs and 56 cows from dairy farms were examined. The ovary and uterine were collected from abattroirs and rectal palpation was carried out in the case of reproductive disorder at dairy farm. Microbiological examination was also carried out from the collected samples. 1. Out of 312 ovaria from slaughter-house, cystic ovary and endometritis were classified as 51(16%) and 134(43%), respectively. And of 56 dairy cow from farms, 43(77%) were identifies as endometritis. 2. The main cause of reproductive disorder was classified as hormonal imbalances, endometritis and cystic ovary, singly or in combination. 3. The main causative agents of endometritis was encountered as E coli, Staphylococcus aureus, Bacillus sp and Corynebacterium sp. 4. The highest susceptible antibiotics to the isolates was cephalosporin.

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The Release of Hepatic triglyceride Lipase from Rat Monolayered Hepatocytes in Primary Culture (일차배양 쥐간세포로부터 간트리글리세리드 Lipase의 유리)

  • ;Yam
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.20 no.1
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    • pp.40-45
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    • 1991
  • The release of hepatic triglyceride lipase from cultured rat hepatocytes and its hormonal regulation were studied. The activity of lipase released into the medium in the presence of heparin was increasing during 24 hours on the 2nd of culture while this was 10% in the absence of heparin as compared with the lipase activity in the presense of heparin. When hepatocytes were cultured with anti-hepatic triglyceride lipase lgG the lipase activity was supp-ressed by 92% The results suggest that the enzyme relaeased into culture medium is identical to hepatic triglyceride lipase which can be released only in the presence of heparin the model of release being similar to that of lipoprotein lipase from adipocytes. The addition of monensin to the medium resulted in The inhibition of lipase secretion by 61% Insulin enhanced lipase activity only 20% whereas dexamethasone suppressed the activity by 44% These data inidica-ted that hepatic triglyceride lipase is secreted and released from hepatocytes in the presence of heparin and its secretion is regulated by hormones.

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The Determinations of Estrogen and Progesterone Receptor in Breast Cancer Cell by Radioimmunoabbay Method (방사선면역법(放射線免疫法)에 의(依)한 유방암세포내(乳房癌細胞內)의 Estrogen과 Progesterone 수용체(受容體)의 측정(測定))

  • Kim, Chi-Yeul
    • The Korean Journal of Nuclear Medicine
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    • v.15 no.2
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    • pp.53-57
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    • 1981
  • The estrogen and progesterone receptors which are bound to the cytoplasmic protein of cancer cells were measured in 20 patients with the early breast cancer by means of radioimmunoassay using charcoal. 1. The Patients with estrogen receptor positive were 13 (65%) of 20 cases and with progestrone receptor positive were 7 cases (35%) in the early breast cancer. 2. Coexistence of estrogen and progesterone receptor positive was noted in 7 cases (35%). The cases of estrogen receptor positive and progesterone receptor negative were 6 cases (33.3%), while there were no cases of estrogen receptor negative with progestrone receptor positive. 3. Coincidence of estrogen and progesterone negative was notied in 7 cases(35%). Conclusively, it is considered that the measurement of estrogen and progesterone receptors has relevance as predictive value, in the response to hormonal manipulations and chemotherapy for breast cancer patients.

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Incidental Multiple Pulmonary Nodules: Benign Metastasizing Leiomyoma and $^{18}F-FDG$ PET/CT (우연히 발견된 다발성 폐결절: 양성 전이성 근종과 $^{18}F-FDG$ PET/CT)

  • Lee, Seok-Mo
    • Nuclear Medicine and Molecular Imaging
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    • v.41 no.3
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    • pp.258-259
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    • 2007
  • Benign metastasizing leiomyoma(BML) is a rare condition affecting women with a history of having undergone hysterectomy or myomectomy for a benign uterine fibroid, that is found to have metastasized to extrauterine sites, usually many years after hysterectomy. 1,2) Patient with BML almost always asymptomatic, although if the lesions are large enough, they can cause compressive symptoms. Among several hypothesis of pathogenesis, most plausible theory is that these tumors represent a true metastatic lesion but are very low-grade sarcoma. 3) Because the tumor is responsive to estrogen, menopause and pregnancy have slowed the growth of these lesion 4) and it seems reasonable to perform hysterectomy in patients with a uterine mass and, at the same time, perform oophorectomy for hormonal control. BML is an unusual cause of diffuse pulmonary nodules which should be considered in females with unexplained nodules and a history of surgery for uterine leiomyoma.

A Case Report of Malignant Mixed Mammary Tumor in Left Caudal Thoracic Mammary Gland of a Dog (개의 좌측후흉측 유선에 발생한 악성혼합유선종양의 발생례)

  • 정순욱;박수현;박남용
    • Journal of Veterinary Clinics
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    • v.16 no.1
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    • pp.199-202
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    • 1999
  • In a 10-year old mixed dog, a $10{\times}10{\times}4$ cm mass was palpated around the left caudal thoracic mammary gland with abdomen expension. In hormonal assay, serum concentrate of progesterone was 0 pg/ml and serum concentrate of estradiol was 66.7 pg/ml. Radiological finding of the mammary gland showed higher density than that of soft tissue and ultrasonographic finding showed inhomogeneous in echogenicity. Light microscopic view of mammary gland showed neoplastic hyperplasia of epithelial and myoepithelial cells and showed some metaplastic lesion of these cells to cartilage or bone tissues with metastasis to the lung. This case was diagnosed as malignant mixed mammary tumor.

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The treatment of insomnia through stability of the autonomic nervous system (자율신경 안정을 통한 불면증 치료)

  • Yoon, Jong-Cheon;Jung, In-Chul;Lee, Sang-Ryong
    • Journal of Haehwa Medicine
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    • v.18 no.2
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    • pp.141-145
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    • 2009
  • Following thesis is about comprehensive treatment of insomnia through stability of the autonomic nervous system. It is widely accepted that most of the relevant symptoms of insomnia can be blamed on successive instability of the autonomic nervous system. In order to treat insomnia effectively, it is essential to maintain stability in the autonomic nervous system. When one is at stable stage of the autonomic nervous system, one maintains steady hormonal discharge. In Oriental Medicine, it is the stage when one has a sound qi-blood circulation. To treat insomnia effectively, one has to obtain both physical and mental relaxation through various ways.

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Primary Pituitary Abscess - Two Cases Report - (원발성 뇌하수체 농양 - 2례 보고 -)

  • Lee, Sung Yeal;Lee, Chang Young;Yim, Man Bin
    • Journal of Korean Neurosurgical Society
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    • v.29 no.8
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    • pp.1098-1102
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    • 2000
  • Pituitary abscess is a very rare disorder, since antibiotics therapy has become widely available. Clinically and radiologically, the preoperative diagnosis of pituitary abscess is difficult because of its features which may be identical to those of any space-occupying lesions of the sella turcica. A combination of clinical features, such as meningitis, paranasal sinusitis and panhypopituitarism with intrasellar cystic lesion with homogeneous ring enhancement on computed tomography or magnetic resonance image should raise the suspicion of a pituitary abscess. Drainage of the abscess through trans-sphenoidal approach, appropriate antibiotics therapy, endocrine assessment and hormonal replacement should bring complete recovery to the patient. The authors review the literature and report two cases of primary pituitary abscess.

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