Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0027627 (metastases)
 103,950 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Cancer of the prostate can be associated with coagulopathy characterized as primary fibrinolysis or diffuse intravascular coagulopathy (DIC) with secondary fibrinolysis. These complications are usually associated with surgical manipulation of the prostate or with advanced metastatic disease. This report describes a patient with DIC and fibrinolysis following medical management of advanced prostate cancer with gonadotropin-releasing hormone leuprolide, while receiving the androgen receptor blocking agent flutamide. This report suggests that release of procoagulant material from prostatic carcinoma may be so rapid following hormonal management that consumptive coagulopathy with fibrinolysis can follow. Shortened Abstract: Medical management with gonadotropin releasing hormone allowed the expression of consumptive coagulopathy in patients with metastatic prostate cancer.
 ...
PMID:Coagulopathy, following medical therapy, for carcinoma of the prostate. 1601 49

Targeted delivery of superparamagnetic iron oxide nanoparticles (SPIONs) could facilitate their accumulation in metastatic cancer cells in peripheral tissues, lymph nodes and bones and enhance the sensitivity of magnetic resonance imaging (MRI). The specificities of luteinizing hormone releasing hormone (LHRH) and luteinizing hormone/chorionic gonadotropin (LH/CG)- bound SPIONs were tested in human breast cancer cells in vitro and were found to be dependent on the receptor expression of the target cells, the time of incubation and showed saturation kinetics. In incubations with MDA-MB-435S.luc cells, the highest iron accumulation was 452.6 pg Fe/cell with LHRH-SPIONs, 203.6 pg Fe/cell with beta-CG-SPIONs and 51.3 pg Fe/cell with SPIONs. Incubations at 4 degrees C resulted in 1.1 pg Fe/cell. Co-incubation with the same ligands (betaCG or LHRH) decreased the iron accumulation in each case. LHRH-SPIONs were poorly incorporated by macrophages. Tumors and metastatic cells from breast cancer xenografts were targeted in vivo in a nude mouse model. LHRH-SPION specifically accumulated in cells of human breast cancer xenografts. The amount of LHRH-SPION in the lungs was directly dependent on the number of metastatic cells and amounted to 77.8 pg Fe/metastastic cell. In contrast, unconjugated SPIONs accumulated in the liver, showed poor affinity to the tumor, and were not detectable in metastatic lesions in the lungs. LHRH-SPION accumulated in the cytosolic compartment of the target cells and formed clusters. LHRH-SPIONs did not accumulate in livers of normal mice. In conclusion, LHRH conjugated SPIONs may serve as a contrast agent for MR imaging in vivo and increase the sensitivity for the detection of metastases and disseminated cells in lymph nodes, bones and peripheral organs.
 ...
PMID:LHRH-conjugated magnetic iron oxide nanoparticles for detection of breast cancer metastases. 1675 77

In a series of in vivo and in vitro experiments, the concept has been established that breast cancer cells that express LH/CG or LHRH receptors can be targeted and destroyed by constructs consisting of a lytic peptide moiety and a 15-amino acid segment of the beta-chain of CG or by an LHRH lytic peptide conjugate. Data obtained in vitro established the validity of this concept, showed the specificities of the Hecate-betaCG, and Phor14 and Phor21-betaCG conjugates in killing cells that express functional LH/CG receptors and proved that the LH/CG receptor capacity is directly related to the compound's specificity. In in vivo experiments, Hecate-betaCG, Phor14-betaCG, and Phor21-betaCG(ala) each caused highly significant reductions of tumor volume and tumor burden in nude mice bearing breast cancer xenografts; Hecate and Phor21 alone or conjugated with non-specific peptides were not effective. Most importantly, the lytic peptide conjugates were all highly effective in targeting and destroying disseminated breast cancer metastases in lymph nodes, bones, lungs and other organs.
 ...
PMID:Destruction of breast cancers and their metastases by lytic peptide conjugates in vitro and in vivo. 1710 Dec 10

LHRH analogs have become a promising modality in prostate cancer therapy as an alternative to surgical castration, and the use of these agents is generally considered to be safe. Since now, only few cases of an apoplexy of previously undiagnosed pituitary adenoma (usually gonadotropinoma) at the beginning of therapy have been described in the medical literature. We present a case of a 74 year old patient who was diagnosed of prostate cancer at the age of 68. There was no evidence of metastatic disease. Radical prostatectomy was performed and LHRH analog gosereline (Zoladex 3.6 mg s.c.) was administered. During the first day after gosereline injection the patient developed headaches that became more severe over the next 3 days. Then the patient experienced nausea and vomiting, double vision and eyelid ptosis. On the 5th day the patient temporarily lost consciousness and was admitted to hospital. Imaging (computerized tomography, magnetic resonance imaging) revealed the presence of a pituitary tumor and hemorrhage within the gland. There was no evidence of pituitary dysfunction in hormonal studies. Neurosurgical intervention was postponed for 5 days after admission. Pathological mass with signs of recent hemorrhage was removed via transsphenoidal route. The tumor had negative immunohistochemical GH, ACTH and PRL staining. Neurological impairment resolved within 9 months after the operation. As a result the patient required adrenal and thyroid replacement. During 6 years of follow-up there was no evidence of prostate cancer recurrence.
 ...
PMID:Apoplexy of clinically silent pituitary adenoma during prostate cancer treatment with LHRH analog. 1715 26

Ovarian cancer is the most lethal of all gynecological cancers. Most deaths from ovarian cancer are due to widespread intraperitoneal metastases and malignant ascites. However, mechanisms of invasion in ovarian cancer remain poorly understood. In this study, we examined the effects of gonadotropin-releasing hormone (GnRH)-I (the classical mammalian GnRH), GnRH-II (a second form of GnRH), and GnRH receptor on invasion using two human ovarian carcinoma cell lines, OVCAR-3 and SKOV-3. Here we demonstrated that in OVCAR-3, GnRH-I and GnRH-II promoted cell invasion, whereas in SKOV-3, GnRH-I and GnRH-II inhibited cell invasion. Transfection of small interfering RNA to abrogate the gene expression of GnRH receptor reversed GnRH-I and GnRH-II-mediated invasion activities, suggesting that the same receptor, type I GnRH receptor, is essential for the effects of GnRH-I and GnRH-II in both OVCAR-3 and SKOV-3. Treatment of SKOV-3 cells with GnRH-I or GnRH-II resulted in a decrease in matrix metalloproteinase 2 but an increase in tissue inhibitor of metalloproteinase 2 secretions. In addition, we found that GnRH-I and GnRH-II interfered with activation of the phosphatidylinositol-3-kinase/AKT pathway that is well documented to stimulate proteolysis and invasion of ovarian cancer cells. Taken together, these observations suggest that GnRH-I and GnRH-II play key regulatory roles in ovarian tumor cell invasion and extracellular matrix degradation.
 ...
PMID:Differential role of gonadotropin-releasing hormone on human ovarian epithelial cancer cell invasion. 1790 81

Neuroadenolysis of the pituitary (NALP) is an efficient measure for treatment of severe pain in patients with bony metastases. It is especially recommended for primary carcinomas of the breast or prostate. The procedure, transsphenoidal puncture of the pituitary under radiographic control and instillation of up to 2 ml 95% alcohol, is simple. The pathomechanism of the analgesic effect is still unknown. Extensive determinations of the anterior pituitary hormones LH, FSH, HPRL, ACTH, and HGH were done before and up to 14 days after NALP in six consecutive patients receiving this treatment. The pituitary was stimulated with releasing hormones LHRH (100 mug) and TRH (200 mug) before and 3 days after NALP. Determinations of hormone parameters were done 25 and 60 min after injection. The results showed that hormone production by the adenohypophysis becomes unevenly suppressed. The following results are significant (P<0.05): (1) LH: poststimulation values are extremely suppressed; (2) FSH: basal values decrease; (3) ACTH: basal values decrease after the 6th day. The antalgic effect of NALP is independent of its hormonal consequences. NALP produces hormonal suppressions of various degrees, and is not a "chemical hypophysectomy".
 ...
PMID:[Restricted adenohyphophyseal function after neuroadenolysis for severe pain due to bony metastases.]. 1841 48

Struma ovarii is a rare monodermal ovarian teratoma composed predominantly of mature thyroid tissue. We describe herein the case of a 22-year-old woman who underwent a right salpingo-oophorectomy for struma ovarii at the age of 12 years, who was admitted 8 years later with signs and symptoms of a left pelvic tumor. Laparoscopy detected a left ovarian endometriotic cyst and multiple nodules on the pelvic peritoneum, right lateral abdominal wall, diaphragm, vesical plica and liver. The diagnosis was abdominal and pelvic widespread dissemination of recurrent struma ovarii, with features consistent with the follicular variant of papillary thyroid carcinoma. The patient was treated with a combination of conservative surgery and two 131I administrations (cumulative activity of 350 mCi after dosimetric evaluation). Because of the high degree of hormonogenesis shown by the metastases, the first administration was performed following use of recombinant human (rh) thyroid-stimulating hormone (TSH) to reach adequate TSH levels. To avoid the 'stunning effect' and to obtain high-quality scintigraphy, a whole-body scan was performed with 123I after rh-TSH and before the 131I therapy. We also discuss the potential role and the possible benefit of using gonadotropin-releasing hormone analogs and ovarian tissue cryopreservation to preserve fertility in women treated with 131I for pelvic metastases from malignant struma ovarii.
 ...
PMID:A case of metastatic struma ovarii treated with 131I therapy: focus on preservation of fertility and selected review of the literature. 1858 10

Castration results in dangerous and disabling side effects. Deferred hormone therapy has been shown to be associated with decreased survival. Intermittent hormone therapy (IHT) was attempted initially to reduce morbidity of treating metastatic prostate cancer with stilboestrol. Preclinical work using castrate mice with hormone sensitive prostate tumours demonstrated that pulses of testosterone delayed the onset of androgen independent growth and PSA production in these mice. This led to development of clinical treatment protocols for use in phase II trials by a number of centres in a variety of clinical scenarios. These phase II trials demonstrated apparent safety of this approach, prompting several large scale RCTs. Thus far no difference in survival has been demonstrated between IHT and continuous hormone therapy despite large numbers and prolonged follow-up. Quality of life has been proven to improve with stopping hormone therapy. A recent meta-analysis and multivariate analysis of phase II studies provides a unique opportunity to identify features of the various published IHT protocols which engender treatment success and allow the following recommendations to be made which may guide the clinician in devising their own IHT protocol. A PSA nadir below 1 ng/ml has been shown to be the best determinant of when it is safe to stop treatment. It can be achieved after as little as three months in patients with local disease. Patients with metastatic disease should be treated for at least eight months. Restarting treatment when the PSA rises to 15 ng/ml prolongs survival. MAB or LHRH monotherapy should be the standard of care in all patients with possible exception of recurrent disease after radiotherapy or prostatectomy where anti-androgen monotherapy may be appropriate. Initial PSA and the level of the PSA nadir achieved enable definition of prostate cancer patients in whom this approach may define a subgroup of local disease patients in whom it may be safe to avoid radical therapy. Preclinical and clinical data from a phase II trial demonstrating that addition of finasteride prolongs the off treatment period and provide the impetus for a randomized controlled trial (RCT) to prove this.
 ...
PMID:Intermittent hormone therapy and its place in the contemporary endocrine treatment of prostate cancer. 1926 65

Androgen deprivation therapy with LHRH agonists is the gold standard in the treatment of metastatic prostate cancer. This treatment leads to decrease the bone mass, thus bone mineral density evaluation is recommended after one year of hormonal treatment to measure bone loss. Bisphosphonate is recommended when metastasis occurred during hormonal resistance phase to reduce bone events. The necessity of preventive treatment and the appropriate schedule is not well established. Long term fracture risk should be ideally evaluated with a CT scan and an MRI. Fragmented and focal radiotherapy is considered as the treatment of choice to decrease localized pain. Metastasis surgery has functional results and should be performed before major neurologic symptoms occur. Metabolic radiotherapy is an option for multifocal bone metastases.
 ...
PMID:[How to manage bone metastasis in prostate cancer. A case report]. 2049 51

Prostate cancer has now become one of the leading types of cancer in urban India. It is now the third most common cancer in Delhi. As we advance in health care with the resultant increase in longevity, we will be seeing more of advanced carcinoma prostate. Since the early 1980.s, there have been many trials on MAB. However, the question remains whether these agents actually make a difference? The role of MAB is probably limited to the prevention of the beta are reaction in patients on LHRH agonists. The non steroidal antiandrogens have a marginal benefit of increased overall survival by approximately 3% to 5% at 5 ve years. There may be a role for MAB in patients with metastatic carcinoma of prostate, low volume metastases, patients with M 1 disease with absence of metastases in the skull, ribs, long bones, and soft tissues excluding lymph nodes.
 ...
PMID:Maximal androgen blockade for advanced prostate cancer. 2053 4


<< Previous 1 2 3 4 5 6 7 8 9 Next >>