Molecules, Vol. 25, Pages 766: Structure-Guided Identification of Black Cohosh (Actaea racemosa) Triterpenoids with In Vitro Activity against Multiple Myeloma

Molecules, Vol. 25, Pages 766: Structure-Guided Identification of Black Cohosh (Actaea racemosa) Triterpenoids with In Vitro Activity against Multiple Myeloma Molecules doi: 10.3390/molecules25040766 Authors: Jöhrer Stuppner Greil Çiçek Black cohosh is a well-established medicinal plant and preparations of its rootstock are used for the treatment of mild climacteric complaints. The compounds considered responsible for the therapeutic effect are triterpene glycosides, characterized by a cycloartane scaffold and a pentose moiety. Because some of these triterpenoids were found to exhibit relevant cytotoxic effects against human breast cancer cells, we decided to investigate their activity on multiple myeloma cell lines NCI-H929, OPM-2, and U266. In a systematic approach, we initially tested three known cytotoxic compounds of three different triterpenoid types, revealing the cimigenol-type triterpenoid as the most active constituent. In a second round, seven naturally occurring cimigenol derivatives were compared with respect to their sugar moiety and their substitution pattern at position C-25, leading to 25-O-methylcimigenol-3-O-α-L-arabinopyranoside as the most potent candidate. Interestingly, not only the methyl group at position C-25 increased the cytotoxic effect but also the arabinose moiety at position C-3 had an impact on the activity. The variety of cimigenol derivatives, moreover, allowed a detailed discussion of their str...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research

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McCubrey The unfolded protein response (UPR) is an evolutionarily conserved adaptive response triggered by the stress of the endoplasmic reticulum (ER) due, among other causes, to altered cell protein homeostasis (proteostasis). UPR is mediated by three main sensors, protein kinase RNA-like endoplasmic reticulum kinase (PERK), activating transcription factor 6α (ATF6α), and inositol-requiring enzyme-1α (IRE1α). Given that proteostasis is frequently disregulated in cancer, UPR is emerging as a critical signaling network in controlling the survival, selection, and adaptation of a ...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Review Source Type: research
An Atlanta, GA-based medical sterilization plant is learning an expensive lesson after missing a critical deadline related to ethylene oxide (EtO) pollution controls. Sterilization Services of Georgia received a permit on Nov. 7 to use EtO to sterilize medical devices, but the company was supposed to install filters to reduce the gas by Dec. 31. The filters were fully operational as of Jan. 18, according to a Jan. 20 letter, but the Georgia Environmental Protection Department (EPD) fined the company $3,000 for each day beyond the deadline that the filters were not connected. In the letter to the Geo...
Source: MDDI - Category: Medical Devices Authors: Tags: Sterilization Source Type: news
The 8 cases selected for this presentation include medication-related osteonecrosis of the jaw (MRONJ) treated conservatively: 2 cases of breast cancer metastasis, 3 cases of multiple myeloma, and 3 cases of osteoporosis. Two of them occurred in the implant area and in 1 case, the treatment was concluded with hyperbaric oxygen therapy. In 5 cases, a bisphosphonate was given via intravenous route and 3 cases by oral administration. Only 1 case had a combination of bisphosphonates and monoclonal antibody (denosumab).
Source: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics - Category: ENT & OMF Authors: Source Type: research
Dependence on the 26S proteasome is an Achilles’ heel for triple-negative breast cancer (TNBC) and multiple myeloma (MM). The therapeutic proteasome inhibitor, bortezomib, successfully targets MM but often leads to drug-resistant disease relapse and fails in breast cancer. Here we show that a 26S proteasome-regulating kinase, DYRK2, is a therapeutic...
Source: Proceedings of the National Academy of Sciences - Category: Science Authors: Tags: Biological Sciences Source Type: research
Shutdowns earlier this year of two facilities that use ethylene oxide (EtO) to sterilize medical devices prompted FDA to monitor for supply shortages in the industry because EtO is such a popular sterilization method for medical devices. This week the agency revealed steps it will take to reduce medtech's reliance on EtO sterilization. EtO is a flammable, colorless gas used to sterilize equipment and plastic devices that cannot be sterilized by steam, such as medical equipment. In fact, about half of all sterilized medical devices undergo sterilization using this gas. Breathi...
Source: MDDI - Category: Medical Devices Authors: Tags: Sterilization Regulatory and Compliance Source Type: news
Publication date: Available online 11 November 2019Source: Blood Cells, Molecules, and DiseasesAuthor(s): Jana Volejnikova, Petr Vojta, Helena Urbankova, Renata Mojzíkova, Monika Horvathova, Ivana Hochova, Jaroslav Cermak, Jan Blatny, Martina Sukova, Eva Bubanska, Jaroslava Feketeova, Daniela Prochazkova, Julia Horakova, Marian Hajduch, Dagmar PospisilovaAbstractDiamond-Blackfan anemia (DBA) is a rare congenital erythroid aplasia, underlied by haploinsufficient mutations in genes coding for ribosomal proteins (RP) in approximately 70% of cases. DBA is frequently associated with somatic malformations, endocrine dysfu...
Source: Blood Cells, Molecules, and Diseases - Category: Hematology Source Type: research
ConclusionsOur study suggests that the ZA use was associated with a decreased risk of SRE for patients with SRE history. However, no preventive effects of ZA were observed for patients without history.
Source: Journal of Bone and Mineral Metabolism - Category: Orthopaedics Source Type: research
by Drew Rosielle (@drosielle)A Series of Observations on Opioids By a Palliative Doc Who Prescribes A Lot of Opioids But Also Has Questions.This is the 5th post in a series about opioids, with a focus on how my thinking about opioids has changed over the years. See also:Part 1 – Introduction, General Disclaimers, Hand-Wringing, and a Hand-Crafted Graph.Part 2 – We Were Wrong 20 years Ago, Our Current Response to the Opioid Crisis is Wrong, But We Should Still Be Helping Most of our Long-Term Patients Reduce Their Opioid DosesPart 3 – Opioids Have Ceiling Effects, High-Doses are Rarely Therapeutic, and Ano...
Source: Pallimed: A Hospice and Palliative Medicine Blog - Category: Palliative Care Tags: cancer opioids pain rosielle The profession Source Type: blogs
ConclusionsThis targeted methylation assay detected cancer signal across>20 cancer types with a single, fixed, low false positive rate and highly accurate TOO localization. These data support the feasibility of a single test that can screen for multiple cancers.Clinical trial identificationNCT02889978, NCT03085888.Editorial acknowledgementSarah Prins, PhD (GRAIL, Inc.), and Megan P. Hall, PhD (GRAIL, Inc.).Legal entity responsible for the studyGRAIL, Inc.FundingGRAIL, Inc.DisclosureG.R. Oxnard: Advisory / Consultancy, Officer / Board of Directors: Inivata; Honoraria (self): Guardant Health; Honoraria (self): Sysmex; Hon...
Source: Annals of Oncology - Category: Cancer & Oncology Source Type: research
This study aimed to analyze the role of postoperative treatment for BC in the development of subsequent HM. Using the French National Health Data System, we examined the HM risks in patients diagnosed with an incident primary breast cancer between 2007 and 2015, who underwent surgery as first-line treatment for BC. Main outcomes were acute myeloid leukemia (AML), Myelodysplastic syndrome (MDS), myeloproliferative neoplasms (MPNs), multiple myeloma (MM), Hodgkin’s lymphoma or non-Hodgkin’s lymphoma (HL/NHL), and acute lymphoblastic leukemia or lymphocytic lymphoma (ALL/LL). Analyses were censored at HM o...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Article Source Type: research
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