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  1. Article: Correction: Al-Qahtani et al. Self-Nanoemulsifying Drug Delivery System of 2-Methoxyestradiol Exhibits Enhanced Anti-Proliferative and Pro-Apoptotic Activities in MCF-7 Breast Cancer Cells.

    Al-Qahtani, Salwa D / Bin-Melaih, Hawazen H / Atiya, Eman M / Fahmy, Usama A / Binmahfouz, Lenah S / Neamatallah, Thikryat / Al-Abbasi, Fahad A / Abdel-Naim, Ashraf B

    Life (Basel, Switzerland)

    2023  Volume 13, Issue 6

    Abstract: In the original publication [ ... ]. ...

    Abstract In the original publication [...].
    Language English
    Publishing date 2023-06-08
    Publishing country Switzerland
    Document type Published Erratum
    ZDB-ID 2662250-6
    ISSN 2075-1729
    ISSN 2075-1729
    DOI 10.3390/life13061343
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Self-Nanoemulsifying Drug Delivery System of 2-Methoxyestradiol Exhibits Enhanced Anti-Proliferative and Pro-Apoptotic Activities in MCF-7 Breast Cancer Cells.

    Al-Qahtani, Salwa D / Bin-Melaih, Hawazen H / Atiya, Eman M / Fahmy, Usama A / Binmahfouz, Lenah S / Neamatallah, Thikryat / Al-Abbasi, Fahad A / Abdel-Naim, Ashraf B

    Life (Basel, Switzerland)

    2022  Volume 12, Issue 9

    Abstract: 1) Background: 2-Methoxyestradiol (2ME) is a metabolite of estrogens and possesses promising anti-proliferative and cytotoxic activities. However, it suffers unfavorable pharmacokinetic characteristics such as absorption after oral administration. The ... ...

    Abstract (1) Background: 2-Methoxyestradiol (2ME) is a metabolite of estrogens and possesses promising anti-proliferative and cytotoxic activities. However, it suffers unfavorable pharmacokinetic characteristics such as absorption after oral administration. The aim of this study was to prepare an optimized 2ME self-nanoemulsifying drug delivery system (2ME-SNEDDS) and evaluate its cytotoxicity and pro-apoptotic activities in MCF-7 breast cancer cells. (2) Methods: For optimization of the 2ME-SNEDDS, a three-component system was used in the D-optimal mixture experimental study. MCF-7 cells were incubated with the 2ME-SNEDDS and subjected to an assessment of growth inhibition, cell cycle progression, annexin V staining, caspase-3 concentration, Bax, Bcl-2, and cyclin D1 mRNA expression, and reactive oxygen species (ROS) generation. (3) Results: The optimized formula had a globule size of 94.97 ± 4.35 nm. Zeta potential was found to be -3.4 ± 1.2 mV with a polydispersity index (PDI) of 0.34. In addition, 96.3  ± 4.3% of 2ME was released from the 2ME-SNEDDS within 24 h using the activated analysis bag technique. Moreover, the prepared 2ME-SNEDDS exhibited a significant enhancement of the anti-proliferative activity against MCF-7 cells in comparison to raw 2ME. This was associated with cyclin D1 expression down-regulation and the accumulation of cells in the G0/G1 and G2/M phases. The pro-apoptotic activities of the 2ME-SNEDDS were confirmed by annexin V staining, which indicated enhanced early and late cell death. This accompanied modulation of the mRNA expression of Bax and Bcl-2 in favor of apoptosis. The 2ME-SNEDDS significantly enhanced cleaved caspase-3 concentration in comparison to raw 2ME. In addition, the 2ME-SNEDDS significantly increased the generation of ROS in MCF-7 cells. (4) Conclusions: The 2ME-SNEDDS exhibits enhanced cytotoxicity and pro-apoptotic activity in MCF-7 cells. This is mediated by, at least partially, ROS generation.
    Language English
    Publishing date 2022-09-02
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662250-6
    ISSN 2075-1729
    ISSN 2075-1729
    DOI 10.3390/life12091369
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: mTOR as a Potential Target for the Treatment of Microbial Infections, Inflammatory Bowel Diseases, and Colorectal Cancer.

    Afzal, Obaid / Altamimi, Abdulmalik S A / Mubeen, Bismillah / Alzarea, Sami I / Almalki, Waleed Hassan / Al-Qahtani, Salwa D / Atiya, Eman M / Al-Abbasi, Fahad A / Ali, Fatima / Ullah, Inam / Nadeem, Muhammad Shahid / Kazmi, Imran

    International journal of molecular sciences

    2022  Volume 23, Issue 20

    Abstract: The mammalian target of rapamycin (mTOR) is the major controller of a number of important cellular activities, including protein synthesis, cell expansion, multiplication, autophagy, lysosomal function, and cellular metabolism. When mTOR interacts with ... ...

    Abstract The mammalian target of rapamycin (mTOR) is the major controller of a number of important cellular activities, including protein synthesis, cell expansion, multiplication, autophagy, lysosomal function, and cellular metabolism. When mTOR interacts with specific adaptor proteins, it forms two complexes, mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The mTOR signaling system regulates gene transcription and protein manufacturing to control proliferation of cell, differentiation of immune cell, and tumor metabolism. Due to its vital role in case of microbial infections, inflammations and cancer development and progression, mTOR has been considered as a key therapeutic target for the development of targeted medication. As autophagy dysfunction is linked to changes in both innate and adaptive immune responses, bacterial clearance defects, and goblet and Paneth cell malfunction, all of these changes are linked to inflammatory bowel diseases (IBD) and colorectal cancer (CRC) pathogenesis. Preclinical and clinical data have shown that the inhibition and induction of autophagy have significant potential to be translated into the clinical applications. In IBD and several CRC models, mTORC1 inhibitors have been found effective. In the recent years, a number of novel mTOR inhibitors have been investigated in clinical trials, and a number of drugs have shown considerably enhanced efficacy when combined with mTOR inhibitors. The future developments in the mTOR targeting medications can benefit patients in individualized therapy. Advanced and innovative medicines that are more effective and have lower drug resistance are still in high demand. New findings could be relevant in medicine development, pharmacological modification, or future mTOR inhibitor research. Therefore, the goal of this review is to present a comprehensive account of current developments on the mTOR pathway and its inhibitors, with an emphasis on the management of microbial infections, the treatment of inflammatory bowel disease, and the management of colon cancer.
    MeSH term(s) Humans ; MTOR Inhibitors ; TOR Serine-Threonine Kinases ; Mechanistic Target of Rapamycin Complex 2/metabolism ; Mechanistic Target of Rapamycin Complex 1/metabolism ; Inflammatory Bowel Diseases/drug therapy ; Colorectal Neoplasms/pathology
    Chemical Substances MTOR Inhibitors ; TOR Serine-Threonine Kinases (EC 2.7.11.1) ; Mechanistic Target of Rapamycin Complex 2 (EC 2.7.11.1) ; Mechanistic Target of Rapamycin Complex 1 (EC 2.7.11.1) ; MTOR protein, human (EC 2.7.1.1)
    Language English
    Publishing date 2022-10-18
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms232012470
    Database MEDical Literature Analysis and Retrieval System OnLINE

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