Receptors for the luteinizing hormone-releasing hormone [LHRH, also known as gonadotropin-releasing hormone (GnRH)] can be regarded as an ideal target for a personalized medicine approach in cancer therapy. LHRH receptors are expressed in about 80% of human endometrial and ovarian cancers, 86% of prostate cancer, and about 50% of breast cancers including triple-negative breast cancer, as well as bladder, colorectal, and pancreatic cancers, sarcomas, lymphomas, melanomas, and renal cell carcinomas. Apart from the pituitary and reproductive organs, other organs and hematopoietic stem cells express LHRH receptors. Thus, a targeted cytotoxic LHRH analog such as AEZS-108 (formerly known as AN-152), in which doxorubin is linked to the LHRH agonist [D-Lys(6)]LHRH, appears to be a suitable drug for targeted chemotherapy of cancers expressing receptors for LHRH, which would be more efficacious and less toxic than standard systemic chemotherapy.
https://www.ncbi.nlm.nih.gov/pubmed/22577891Die 80% sind ein Durchschnittswert der Ovarian Tumore in denen die LHRH-Rezeptoren exprimiert werden.
The persentage of tumor cells staining positive for LHRH-R ranged from 30% to 90% (mean 68%)
Dabei wurden LHRH aktivitäten von 30% -90% in den einzelnen Tumoren eruiert. (Durchschnitt 68% LHRH)
Das ist eigentlich eine Frage für boreas! :-)
Den Patienten wird durch Chirugie oder Biopsie Tumorgewebe entnommen. Diese Proben sind auf LHRH expresion untersucht worden. Dabei werden Zellinien .........
https://www.ncbi.nlm.nih.gov/pubmed/27639272https://www.ncbi.nlm.nih.gov/pubmed/27639272Denke jede der Probe hat ein Ansprechen von min. 30% bis max 90% auf LHRH-bindung. Im Durchschnitt 68% des Tumorgewebe ist LHRH positiv.
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Was alles im Netz umhergeistert.
Results
Sixty-nine of 80 (86%) cancers exhibited specific, medium to high-affinity binding for [D-Trp6]LHRH with a dissociation constant (Kd) of 6.55 ± 0.4 nM and a maximal binding capacity (Bmax) of 483.6 ± 25.4 fmol./mg. membrane protein. Two prostate cancer patients who were treated with the LHRH agonist goserelin prior to prostatectomy did not show tumor LHRH receptors. The expression of mRNA for LHRH receptors was observed in 19 of 22 (86%) prostate cancers. Benign prostatic tissue also displayed LHRH receptor gene expression, but exhibited lower Bmax value. There was a negative correlation (p <0.001) between LHRH receptor binding capacity and cancer grade (Gleason score); higher Gleason scores were associated with significantly lower binding capacity but an increased binding affinity.
http://www.jurology.com/article/S0022-5347(05)67947-5/abstract