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Matrix Metalloproteinases, Leukocytes And Menstruation
Funder
National Health and Medical Research Council
Funding Amount
$191,812.00
Summary
Menstrual bleeding problems are a common cause of pain and discomfort for women and often are satisfactorily treated only by hysterectomy. Despite this, little is known about the processes causing menstruation. Recently, we and others have demonstrated a role for a family of biological catalysts (enzymes) which break down the structure of the tissue lining the uterus (the endometrium) and are thought to cause menstrual bleeding. However, the mechanisms regulating their production during the norm ....Menstrual bleeding problems are a common cause of pain and discomfort for women and often are satisfactorily treated only by hysterectomy. Despite this, little is known about the processes causing menstruation. Recently, we and others have demonstrated a role for a family of biological catalysts (enzymes) which break down the structure of the tissue lining the uterus (the endometrium) and are thought to cause menstrual bleeding. However, the mechanisms regulating their production during the normal menstrual cycle is still largely unknown. Cells which come initially from the blood (leukocytes, particularly neutrophils and eosinophils) dramatically increase in numbers immediately prior to menstruation and these along with other cells, known as mast cells, start to produce a number of factors which we postulate are important for regulation of the enzymes. These cells, are also present in high numbers in endometrium of women with menstrual bleeding problems. This study will demonstrate that both the enzymes, and the leukocytes play a critical role in menstruation and will determine how the leukocytes in the endometrium are regulated. The studies have important implications for understanding and treating menstrual bleeding disorders.Read moreRead less
The Role Of MMPs 1 And 9 And MT-1 MMP In Hormone Replacement Therapy Related Irregular Bleeding
Funder
National Health and Medical Research Council
Funding Amount
$294,625.00
Summary
Approximately 40% of women in Australia chose to take Hormone Replacement Therapy (HRT). This choice is usually based upon the perceived benefits of HRT such as the relief of debilitating menopausal symptoms (such as hot flushes and sweats), the prevention of brittle bone disease (osteoporosis) and the potential prevention of heart disease and memory loss (dementia). Unfortunately, many of these women (up to two thirds in a large UK study) then suffer from irregular bleeding. This is not only in ....Approximately 40% of women in Australia chose to take Hormone Replacement Therapy (HRT). This choice is usually based upon the perceived benefits of HRT such as the relief of debilitating menopausal symptoms (such as hot flushes and sweats), the prevention of brittle bone disease (osteoporosis) and the potential prevention of heart disease and memory loss (dementia). Unfortunately, many of these women (up to two thirds in a large UK study) then suffer from irregular bleeding. This is not only inconvenient, but raises anxiety that the bleeding may be a symptom of serious illness such as cancer of the womb. Many HRT users then undergo internal examinations, tests and operations to exclude cancer as the cause of the bleeding. In almost all cases no other abnormality is found. However, many women decide not to continue with HRT because of this troublesome bleeding. Very little is understood about the reason why women using HRT have irregular bleeding. Furthermore, there are no ways of predicting who will be affected and no established way to stopping or preventing bleeding apart from discontinuing HRT. This problem affects all HRT preparations. Previous pilot studies by the CI (Associate Professor Martha Hickey) have demonstrated for the first time that there are changes in the lining of the womb in women using HRT which may lead to bleeding. These are similar to changes seen in younger women with breakthrough bleeding using contraceptives. The planned project intends to futher explore the actions of the important molecules which break down the blood vessels of the womb lining (endometrium) and cause bleeding. This raises the possibility that specific agents could be developed to stop or prevent bleeding in HRT users. This is likely to substantially increase the acceptability of HRT and may thus have major positive health implications for women in Australia and worldwide.Read moreRead less
Excessive menstrual bleeding (menorrhagia) affects the health and quality of life of 1 in 3 women. There are also significant economic issues due to treatment costs and absence from work. Current medical therapies are insufficient or associated with side-effects and many women instead choose surgery (hysterectomy). The overall aim of our research is to elucidate the molecular mechanisms responsible for heavy menstrual bleeding and to determine how medical therapies can be better directed at indi ....Excessive menstrual bleeding (menorrhagia) affects the health and quality of life of 1 in 3 women. There are also significant economic issues due to treatment costs and absence from work. Current medical therapies are insufficient or associated with side-effects and many women instead choose surgery (hysterectomy). The overall aim of our research is to elucidate the molecular mechanisms responsible for heavy menstrual bleeding and to determine how medical therapies can be better directed at individual women.Read moreRead less
Novel Roles For Follistatin In Reproductive Biology
Funder
National Health and Medical Research Council
Funding Amount
$630,916.00
Summary
The follistatin protein has important functions throughout the body. Recent studies using mutant mice have identified key roles for follistatin in the development and function of the female reproductive system (ovary, uterus). We will now undertake detailed studies to determine how follistatin regulates these processes. This is relevant to our understanding of the mechanisms causing infection and inflammation in the reproductive tract.
Regulation Of Endometrial Angiogenesis And Lymphangiogenesis
Funder
National Health and Medical Research Council
Funding Amount
$488,273.00
Summary
Unlike almost all other parts of the adult body, the blood vessels of the endometrium (lining of the uterus) grow and breakdown each month as part of the menstrual cycle. The endometrium also has a very unusual distribution of lymph vessels, which are responsible for removing excess fluid from the tissues and also have an important role in the immune system. The overall aim of this research is to understand how growth and regression of these vascular systems are controlled in the endometrium. Th ....Unlike almost all other parts of the adult body, the blood vessels of the endometrium (lining of the uterus) grow and breakdown each month as part of the menstrual cycle. The endometrium also has a very unusual distribution of lymph vessels, which are responsible for removing excess fluid from the tissues and also have an important role in the immune system. The overall aim of this research is to understand how growth and regression of these vascular systems are controlled in the endometrium. The information will have immediate relevance to a number of clinical problems in which abnormal changes in the blood and lymph vascular systems are observed (e.g. tumour growth, wound healing). This includes a number of significant problems relevant to women's health. Non-menstrual bleeding (often termed breakthrough bleeding) is one of the most common gynaecological problems suffered by women, and can be particularly worrying as it may be a symptom of more serious diseases such as uterine cancer. Breakthrough bleeding can occur under a wide range of hormonal conditions and is thought to be due, at least in part, to faulty uterine blood vessel growth. Endometrial cancer is another serious disease and is the most frequently diagnosed malignancy of the female reproductive system. When diagnosed early, this cancer responds well to therapy. However, treatment of this disease is much more difficult when an increase in blood vessel growth is observed and the tumours interact with the lymphatic vascular system. An aim of this research is to investigate changes in uterine blood and lymph vessel growth associated with breakthrough bleeding and endometrial cancer.Read moreRead less
Focus On The Uterus: Basic And Translational Research Strategies To Address Key Issues In Women’s Health. Fertility, Infertility, Endometrial And Pregnancy Disorders.
Funder
National Health and Medical Research Council
Funding Amount
$1,085,790.00
Summary
My work focuses on the endometrium, the lining of the uterus, into which the embryo implants to establish pregnancy. When the endometrium does not function correctly, the woman is usually infertile. Other disorders of the endometrium include endometriosis, menstrual bleeding problems and cancer. My studies have defined the molecular basis for much endometrial dysfunction. I am now developing non-invasive tests for these problems and rationales for new treatments.
Critical Role Of Proprotein Convertase 6 In Human Uterine Epithelium For Embryo Implantation And Clinical Implications
Funder
National Health and Medical Research Council
Funding Amount
$643,899.00
Summary
Implantation of an embryo into the uterus is a key step for human development. Implantation failure causes embryonic death, pregnancy loss and infertility. Conversely, preventing implantation is an attractive approach for contraception. We have established that proprotein convertase 6 (PC6) is a master regulator of implantation. We will investigate how PC6 works in a woman's uterus, and how we can use this knowledge to improve implantation in IVF and to develop PC6 drugs for new contraceptives.