The Experts below are selected from a list of 7395 Experts worldwide ranked by ideXlab platform

Kelly Chibale - One of the best experts on this subject based on the ideXlab platform.

Renate H Hans - One of the best experts on this subject based on the ideXlab platform.

Chengguo Xing - One of the best experts on this subject based on the ideXlab platform.

  • inhibition of mitogen activated protein kinases increases the sensitivity of a549 lung cancer cells to the cytotoxicity induced by a kava chalcone analog
    Biochemical and Biophysical Research Communications, 2012
    Co-Authors: Janel K Warmka, Eric L Solberg, Nicholette A Zeliadt, Balasubramanian Srinivasan, Aaron T Charlson, Chengguo Xing, Elizabeth V Wattenberg
    Abstract:

    We are interested in investigating the biological activity of Chalcones, a major class of compounds found in the beverage kava, in order to develop potent and selective chemopreventive candidates. Consumption of kava in the South Pacific Islands is inversely correlated with cancer incidence, even among smokers. Accordingly, Chalcones have anti-cancer activities in animal and cell culture models. To investigate signaling pathways that affect chalcone action we studied a potent analog, (E)-3-(3-hydroxy-4-methoxyphenyl)-1-(3,4,5-trimethoxyphenyl)prop-2-en-1-one (chalcone-24). Chalcone-24 was selected from a series of chalcone analogs that were synthesized based on the structures derived from flavokawain compounds found in kava, and screened in A549 lung cancer cells for induction of cytotoxicity and inhibition of NF-κB, a transcription factor associated with cell survival. Incubation of A549 cells with chalcone-24 resulted in a dose-dependent inhibition of cell viability, inhibition of NF-κB, activation of caspases, and activation of extracellular signal regulated kinase 1/2 (ERK1/2) and c-Jun N-terminal kinase (JNK); ERK1/2 and JNK are mitogen activated protein kinases that play central roles in regulating cell fate. Pharmacological inhibitors of ERK1/2 or JNK increased the sensitivity of A549 cells to chalcone-24-induced cytotoxicity, without affecting NF-κB or caspase activity. These results will help refine the synthesis of chalcone analogs to maximize the combination of actions required to prevent and treat cancer.

  • structure activity relationship studies of chalcone leading to 3 hydroxy 4 3 4 5 tetramethoxychalcone and its analogues as potent nuclear factor κb inhibitors and their anticancer activities
    Journal of Medicinal Chemistry, 2009
    Co-Authors: Balasubramanian Srinivasan, Thomas E Johnson, Rahul Lad, Chengguo Xing
    Abstract:

    Chalcone is a privileged structure, demonstrating promising anti-inflammatory and anticancer activities. One potential mechanism is to suppress nuclear factor kappa B (NF-κB) activation. The structures of chalcone-based NF-κB inhibitors vary significantly that there is minimum information about their structure−activity relationships (SAR). This study aims to establish SAR of chalcone-based compounds to NF-κB inhibition, to explore the feasibility of developing simple chalcone-based potent NF-κB inhibitors, and to evaluate their anticancer activities. Three series of Chalcones were synthesized in one to three steps with the key step being aldol condensation. These candidates demonstrated a wide range of NF-κB inhibitory activities, some of low micromolar potency, establishing that structural complexity is not required for NF-κB inhibition. Lead compounds also demonstrate potent cytotoxicity against lung cancer cells. Their cytotoxicities correlate moderately well with their NF-κB inhibitory activities, sug...

Balasubramanian Srinivasan - One of the best experts on this subject based on the ideXlab platform.

  • inhibition of mitogen activated protein kinases increases the sensitivity of a549 lung cancer cells to the cytotoxicity induced by a kava chalcone analog
    Biochemical and Biophysical Research Communications, 2012
    Co-Authors: Janel K Warmka, Eric L Solberg, Nicholette A Zeliadt, Balasubramanian Srinivasan, Aaron T Charlson, Chengguo Xing, Elizabeth V Wattenberg
    Abstract:

    We are interested in investigating the biological activity of Chalcones, a major class of compounds found in the beverage kava, in order to develop potent and selective chemopreventive candidates. Consumption of kava in the South Pacific Islands is inversely correlated with cancer incidence, even among smokers. Accordingly, Chalcones have anti-cancer activities in animal and cell culture models. To investigate signaling pathways that affect chalcone action we studied a potent analog, (E)-3-(3-hydroxy-4-methoxyphenyl)-1-(3,4,5-trimethoxyphenyl)prop-2-en-1-one (chalcone-24). Chalcone-24 was selected from a series of chalcone analogs that were synthesized based on the structures derived from flavokawain compounds found in kava, and screened in A549 lung cancer cells for induction of cytotoxicity and inhibition of NF-κB, a transcription factor associated with cell survival. Incubation of A549 cells with chalcone-24 resulted in a dose-dependent inhibition of cell viability, inhibition of NF-κB, activation of caspases, and activation of extracellular signal regulated kinase 1/2 (ERK1/2) and c-Jun N-terminal kinase (JNK); ERK1/2 and JNK are mitogen activated protein kinases that play central roles in regulating cell fate. Pharmacological inhibitors of ERK1/2 or JNK increased the sensitivity of A549 cells to chalcone-24-induced cytotoxicity, without affecting NF-κB or caspase activity. These results will help refine the synthesis of chalcone analogs to maximize the combination of actions required to prevent and treat cancer.

  • structure activity relationship studies of chalcone leading to 3 hydroxy 4 3 4 5 tetramethoxychalcone and its analogues as potent nuclear factor κb inhibitors and their anticancer activities
    Journal of Medicinal Chemistry, 2009
    Co-Authors: Balasubramanian Srinivasan, Thomas E Johnson, Rahul Lad, Chengguo Xing
    Abstract:

    Chalcone is a privileged structure, demonstrating promising anti-inflammatory and anticancer activities. One potential mechanism is to suppress nuclear factor kappa B (NF-κB) activation. The structures of chalcone-based NF-κB inhibitors vary significantly that there is minimum information about their structure−activity relationships (SAR). This study aims to establish SAR of chalcone-based compounds to NF-κB inhibition, to explore the feasibility of developing simple chalcone-based potent NF-κB inhibitors, and to evaluate their anticancer activities. Three series of Chalcones were synthesized in one to three steps with the key step being aldol condensation. These candidates demonstrated a wide range of NF-κB inhibitory activities, some of low micromolar potency, establishing that structural complexity is not required for NF-κB inhibition. Lead compounds also demonstrate potent cytotoxicity against lung cancer cells. Their cytotoxicities correlate moderately well with their NF-κB inhibitory activities, sug...

Bruno J Neves - One of the best experts on this subject based on the ideXlab platform.

  • chalcone derivatives promising starting points for drug design
    Molecules, 2017
    Co-Authors: Marcelo N Gomes, Eugene N Muratov, Maristela Pereira, Josana De Castro Peixoto, Lucimar Pinheiro Rosseto, Pedro Cravo, Carolina Horta Andrade, Bruno J Neves
    Abstract:

    Medicinal chemists continue to be fascinated by chalcone derivatives because of their simple chemistry, ease of hydrogen atom manipulation, straightforward synthesis, and a variety of promising biological activities. However, Chalcones have still not garnered deserved attention, especially considering their high potential as chemical sources for designing and developing new effective drugs. In this review, we summarize current methodological developments towards the design and synthesis of new chalcone derivatives and state-of-the-art medicinal chemistry strategies (bioisosterism, molecular hybridization, and pro-drug design). We also highlight the applicability of computer-assisted drug design approaches to Chalcones and address how this may contribute to optimizing research outputs and lead to more successful and cost-effective drug discovery endeavors. Lastly, we present successful examples of the use of Chalcones and suggest possible solutions to existing limitations.