Hormonal changes

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  • Adolescence is the product of a complex, constructed ecology. It varies with culture, place, historical time and national economic development. Chapter 7 provides knowledge of the adolescence, this chapter includes contents: Adolescence as a construction, discourses of adolescence, effects of hormonal changes, a socio-historical approach,...

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  • This book highlights the needs and healthcare concerns of women in their mid life.Women in middle age are often overlooked by medical practitioners. From the end of childbearing to old age, approximately ages 40–65 years, their health needs are complex and changing. This is a time of challenge and opportunity, when the physician and woman working collaboratively can change her health and future. Mid-life healthcare is far more than hormones.

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  • A woman's hormone balance plays a part in most endometrial cancers. Many of the risk factors for endometrial cancer affect estrogen levels. Before change of life, the ovaries are the main source of the 2 main types of female hormones -- estrogen and progesterone. The balance between these hormones changes during a woman's menstrual cycle each month. A shift in the balance of these 2 hormones toward more estrogen increases a woman's risk for getting endometrial cancer.

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  • Therefore, the brain hormonal milieu in which exogenous hormones are introduced is markedly different in menopause from that in menstruating women. In the ovariectomized animals, however, the hormonal changes in the animals are abrupt in contrast to the gradual hormonal changes found in the menopausal transition. It might be the concerted lack of estradiol and progesterone that facilitate the seizure susceptibility. Both estradiol and progesterone affect γ-amino butyric acid (GABA) ergic function (Scharfman et al, 2005; Nakumura et al, 2005; Kokate et al, 1994).

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  • Lung cancer is the most frequent cause of cancer deaths in both men and women in the U.S. (1). Although tobacco smoking is accepted as the number one cause of this devastating disease, our understanding of the acquired genetic changes leading to lung cancer is still rudimentary. Lung cancer is classifi ed into two major clinic-pathological groups, small cell lung carcinoma (SCLC) and non-small cell lung carcinoma (NSCLC) (2). Squamous cell carcinoma, adenocarcinoma, and large cell carcinoma are the major histologic types of NSCLC....

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  • Chất nhờn trên da được sản sinh từ tuyến bã nhờn nằm dưới lỗ chân lông. Gien di truyền, lượng hormone trong cơ thể và mức độ hoạt động của tuyến nhờn là những yếu tố quyết định mức độ nhờn trên làn da.

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  • The hippocampus and cerebral cortex are areas associated with seizure initiation and propagation. It is therefore discussed how pathological disturbances in the local estrogen production after menopause may contribute to an increase in seizures in some women (Veliskova, 2007). Estrone is the primary estrogen after menopause, and its main source is subcutaneous fat. This might be of importance for overweight women with epilepsy. Little is known on the influence of estrone on epilepsy.

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  • Thịt và Sữa Bò Có Nhiễm Hormone Hay Không? Trong chuyện ăn uống thường ngày, vấn đề thịt nhiễm hormone đôi khi được nhiều người nêu ra. Thật vậy, nếu nhìn quanh ta, hình như bệnh cancer ngày nay có vẻ xuất hiện thường hơn ngày xưa. Đây cũng là mối ưu tư chung của rất nhiều người.

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  • Sau cơn stress kéo dài, tuyến thượng thận rã rời không còn sức sản xuất các hormone cần thiết, hậu quả là tinh thần và thể chất suy sụp gây nên những căn bệnh mãn tính. Tuyến thượng thận (TTT) gồm hai tuyến hình tam giác phủ vào mặt trên của mỗi quả thận, chịu trách nhiệm xuất xưởng vài loại hormone (chẳng hạn như adrenaline được tiết ra mỗi khi chúng ta chạy nhảy, gặp nguy hiểm, thậm chí ngay lúc... hẹn hò; ...

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: 24-hour changes in circulating prolactin, follicle-stimulating hormone, luteinizing hormone and testosterone in male rats subjected to social isolation...

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Changes in appetite related gut hormones in intensive care unit patients: a pilot cohort study...

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  • Mất cân bằng hormon có liên quan đến tắt dục, giống như mãn kinh ở phụ nữ. Dấu hiệu mất cân bằng hormon có thể dễ nhận biết, nhưng hầu hết thường khó phát hiện.  1 Suy giảm năng lượng cơ thể Một trong những dấu hiệu phổ biến nhất của tình trạng mất cân bằng hormon là mệt mỏi và giảm năng lượng với những thể hiện khác nhau. Chẳng hạn như mệt mỏi cực độ sau khi ăn, không thể làm việc lâu hoặc nhiều như bình thường, suy giảm năng suất lao động.

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  • During the last two decades, evidence of increasing trends of several endocrine-related disorders has been strengthened. These disorders often come with lack of uniform diagnosis and/ or even unclear endocrine disruption. The later is mainly due to abnormal classical changes in the blood- released hormone to its targeted organ, abnormal communication between cells within a tissue or organ (paracrine), within the same cell (intracrine) or signals which act on the same cell (autocrine).

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  • In most women, the menstrual cycle continues for at least 40 years from puberty. Between the ages of 45 and 55, the levels of hormones change; the menstrual cycle becomes less regular and eventually stops. This stage, called menopause, marks the point at which a female is no longer capable of reproducing. Menopause is a normal occurrence in all women; however, the effects of menopause vary widely from one woman to another. In men, by contrast, sperm production continues throughout life, although the number of healthy sperm likely declines with age....

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  • Thyroid hormones are involved in growth and development, particularly of the brain. Thus, it is imperative that these hormones get from their site of synthesis to their sites of action throughout the body and the brain. This role is fulfilled by thyroid hormone distributor proteins. Of particular inter-est is transthyretin, which in mammals is synthesized in the liver, choroid plexus, meninges

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  • The relationship between the structure of the N-terminal sequence of trans-thyretin (TTR) and the binding of thyroid hormone was studied. A recom-binant human TTR and two derivatives of Crocodylus porosusTTRs, one with the N-terminal sequence replaced by that of human TTR (human⁄crocTTR), the other with the N-terminal segment removed (trun-cated crocTTR), were synthesized inPichia pastoris.

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  • Changes in the oligomeric status of MutS protein was probed in solution by dynamic light scattering (DLS), and corroborated by sedimentation ana-lyses. In the absence of any nucleotide cofactor, free MutS protein [hydro-dynamic radius (Rh) of 10–12 nm] shows a small increment in size (Rh 14 nm) following the addition of homoduplex DNA (121 bp), whereas the same increases to about 18–20 nm with heteroduplex DNA containing a mismatch.

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  • The deacetylase inhibitor trichostatin A (TSA) has long been used to study the relationship between gene transcrip-tion and the acetylation status of chromatin. We have usedXenopus laevisoocytes to study the effects of TSA on glucocorticoid receptor (GR)-dependent transcription and we have related these effects to changes in the chromatin structure of a reporter mouse mammary tumor virus (MMTV) promoter. We show that TSA induces a low level of constitutive transcription.

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  • To sustain life mammals have an absolute and continual requirement for oxygen, which is necessary to produce energy for normal cell survival and growth. Hence, main-tainingoxygen homeostasis is a critical requirement and mammals have evolved a wide range of cellular and phy-siological responses to adapt to changes in oxygen avail-ability. In the past few years it has become evident that the transcriptional protein complex hypoxia-inducible factor (HIF) is a key regulator of these processes.

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  • Thea-phycoerythrocyanin subunits of the different phy-coerythrocyanin complexes of the phycobilisomes from the cyanobacterium Mastigocladus laminosusperform a remarkable photochemistry. Similar to phytochromes – the photoreceptors of higher plants – the spectral pro-perties of the molecule reversibly change according to the irradiation wavelength. To enable extensive analyses,the protein has been produced at high yield by improving purification protocols.

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