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Zhao SJ, Prior D, Heske CM, Vasquez JC. Therapeutic Targeting of DNA Repair Pathways in Pediatric Extracranial Solid Tumors: Current State and Implications for Immunotherapy. Cancers (Basel) 2024; 16:1648. [PMID: 38730598 PMCID: PMC11083679 DOI: 10.3390/cancers16091648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 04/21/2024] [Accepted: 04/22/2024] [Indexed: 05/13/2024] Open
Abstract
DNA damage is fundamental to tumorigenesis, and the inability to repair DNA damage is a hallmark of many human cancers. DNA is repaired via the DNA damage repair (DDR) apparatus, which includes five major pathways. DDR deficiencies in cancers give rise to potential therapeutic targets, as cancers harboring DDR deficiencies become increasingly dependent on alternative DDR pathways for survival. In this review, we summarize the DDR apparatus, and examine the current state of research efforts focused on identifying vulnerabilities in DDR pathways that can be therapeutically exploited in pediatric extracranial solid tumors. We assess the potential for synergistic combinations of different DDR inhibitors as well as combinations of DDR inhibitors with chemotherapy. Lastly, we discuss the immunomodulatory implications of targeting DDR pathways and the potential for using DDR inhibitors to enhance tumor immunogenicity, with the goal of improving the response to immune checkpoint blockade in pediatric solid tumors. We review the ongoing and future research into DDR in pediatric tumors and the subsequent pediatric clinical trials that will be critical to further elucidate the efficacy of the approaches targeting DDR.
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Affiliation(s)
- Sophia J. Zhao
- Department of Pediatric Hematology/Oncology, Yale University School of Medicine, New Haven, CT 06510, USA; (S.J.Z.); (D.P.)
| | - Daniel Prior
- Department of Pediatric Hematology/Oncology, Yale University School of Medicine, New Haven, CT 06510, USA; (S.J.Z.); (D.P.)
| | - Christine M. Heske
- Pediatric Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA;
| | - Juan C. Vasquez
- Department of Pediatric Hematology/Oncology, Yale University School of Medicine, New Haven, CT 06510, USA; (S.J.Z.); (D.P.)
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Liu X, Liu B, Luo X, Liu Z, Tan X, Zhu K, Ouyang F. Research progress on the role of p53 in pulmonary arterial hypertension. Respir Investig 2024; 62:541-550. [PMID: 38643536 DOI: 10.1016/j.resinv.2024.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 03/13/2024] [Accepted: 03/28/2024] [Indexed: 04/23/2024]
Abstract
PURPOSE OF REVIEW Pulmonary arterial hypertension (PAH) is a devastating disease characterized by increased pulmonary vascular resistance and pulmonary arterial pressure. At present, the definitive pathology of PAH has not been elucidated and its effective treatment remains lacking. Despite PAHs having multiple pathogeneses, the cancer-like characteristics of cells have been considered the main reason for PAH progression. RECENT FINDINGS p53 protein, an important tumor suppressor, regulates a multitude of gene expressions to maintain normal cellular functions and suppress the progression of malignant tumors. Recently, p53 has been found to exert multiple biological effects on cardiovascular diseases. Since PAH shares similar metabolic features with cancer cells, the regulatory roles of p53 in PAH are mainly the induction of cell cycle, inhibition of cell proliferation, and promotion of apoptosis. SUMMARY This paper summarized the advanced findings on the molecular mechanisms and regulatory functions of p53 in PAH, aiming to reveal the potential therapeutic targets for PAH.
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Affiliation(s)
- Xiangyang Liu
- Department of Cardiovascular Medicine, Zhuzhou Central Hospital, The Affiliated Zhuzhou Hospital Xiangya Medical College, Central South University, No.116 Changjiangnan Road, Tianyuan District, Zhuzhou City, 412000, Hunan, China
| | - Biao Liu
- Department of Cardiovascular Medicine, Taojiang County People's Hospital, No.328 Taohuaxi Road, Taohuajiang Town, Taojiang County, Yiyang City, 413499, Hunan, China
| | - Xin Luo
- Department of Cardiovascular Medicine, Zhuzhou Central Hospital, The Affiliated Zhuzhou Hospital Xiangya Medical College, Central South University, No.116 Changjiangnan Road, Tianyuan District, Zhuzhou City, 412000, Hunan, China
| | - Zhenfang Liu
- Department of Cardiovascular Medicine, Zhuzhou Central Hospital, The Affiliated Zhuzhou Hospital Xiangya Medical College, Central South University, No.116 Changjiangnan Road, Tianyuan District, Zhuzhou City, 412000, Hunan, China
| | - Xiaoli Tan
- Department of Cardiovascular Medicine, Zhuzhou Central Hospital, The Affiliated Zhuzhou Hospital Xiangya Medical College, Central South University, No.116 Changjiangnan Road, Tianyuan District, Zhuzhou City, 412000, Hunan, China
| | - Ke Zhu
- Department of Cardiovascular Medicine, Zhuzhou Central Hospital, The Affiliated Zhuzhou Hospital Xiangya Medical College, Central South University, No.116 Changjiangnan Road, Tianyuan District, Zhuzhou City, 412000, Hunan, China.
| | - Fan Ouyang
- Department of Cardiovascular Medicine, Zhuzhou Central Hospital, The Affiliated Zhuzhou Hospital Xiangya Medical College, Central South University, No.116 Changjiangnan Road, Tianyuan District, Zhuzhou City, 412000, Hunan, China.
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In Vitro effects of alternative smoking devices on oral cells: Electronic cigarette and heated tobacco product versus tobacco smoke. Arch Oral Biol 2022; 144:105550. [DOI: 10.1016/j.archoralbio.2022.105550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/24/2022] [Accepted: 09/18/2022] [Indexed: 11/20/2022]
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Tarko A, Štochmaľová A, Hrabovszká S, Vachanová A, Harrath AH, Aldahmash W, Grossman R, Sirotkin AV. Potential Protective Effect of Puncture Vine (Tribulus terrestris, L.) Against Xylene Toxicity on Bovine Ovarian Cell Functions. Physiol Res 2022; 71:249-258. [DOI: 10.33549/physiolres.934871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The action of the medicinal plant Tribulus terrestris (TT) on bovine ovarian cell functions, as well as the protective potential of TT against xylene (X) action, remain unknown. The aim of the present in vitro study was to elucidate the influence of TT, X and their combination on basic bovine ovarian cell functions. For this purpose, we examined the effect of TT (at doses of 0, 1, 10, and 100 ng/ml), X (at 20 μg/ml) and the combination of TT + X (at these doses) on proliferation, apoptosis and hormone release by cultured bovine ovarian granulosa cells. Markers of proliferation (accumulation of PCNA), apoptosis (accumulation of Bax) and the release of hormones (progesterone, testosterone and insulin-like growth factor I, IGF-I) were analyzed by quantitative immunocytochemistry and RIA, respectively. TT addition was able to stimulate proliferation and testosterone release and inhibit apoptosis and progesterone output. The addition of X alone stimulated proliferation, apoptosis and IGF-I release and inhibited progesterone and testosterone release by ovarian cells. TT was able to modify X effects: it prevented the antiproliferative effect of X, induced the proapoptotic action of X, and promoted X action on progesterone but not testosterone or IGF-I release. Taken together, our observations represent the first demonstration that TT can be a promoter of ovarian cell functions (a stimulator of proliferation and a suppressor of apoptosis) and a regulator of ovarian steroidogenesis. X can increase ovarian cell proliferation and IGF-I release and inhibit ovarian steroidogenesis. These effects could explain its anti-reproductive and cancer actions. The ability of TT to modify X action on proliferation and apoptosis indicates that TT might be a natural protector against some ovarian cell disorders associated with X action on proliferation and apoptosis, but it can also promote its adverse effects on progesterone release.
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Affiliation(s)
| | | | | | | | - AH Harrath
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia.
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