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Zhang Y, Shang Z, Xu S, Zhou G, Liu A. ELF5-Regulated lncRNA-TTN-AS1 Alleviates Myocardial Cell Injury via Recruiting PCBP2 to Increase CDK6 Stability in Myocardial Infarction. Mol Cell Biol 2024; 44:303-315. [PMID: 39034459 PMCID: PMC11296528 DOI: 10.1080/10985549.2024.2374083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 05/29/2024] [Accepted: 06/25/2024] [Indexed: 07/23/2024] Open
Abstract
Myocardial infarction (MI) seriously threatens the health of elderly people, and reducing myocardial injury is of great significance for the treatment of MI. LncRNA-TTN-AS1 shows protective effects on cardiomyocyte injury, while the role of TTN-AS1 in MI remains unknown. CCK8, flow cytometry, and JC-1 staining assessed cell viability, apoptosis and mitochondrial membrane potential (MMP), respectively. Cellular reactive oxygen species (ROS) and secreted lactate dehydrogenase (LDH) levels were measured. The interactions between ELF5, TTN-AS1, PCBP2 and CDK6 were explored using ChIP, luciferase reporter assay, RIP, and pull-down. The severity of MI in mice was evaluated using TTC, H&E, and TUNEL staining. The data revealed that OGD/R significantly induced ROS, mitochondrial injury and apoptosis in AC16 cells, while overexpression of ELF5 or TTN-AS1 reversed these phenomena. ELF5 transcriptionally activated TTN-AS1 through binding with its promoter. TTN-AS1 increased CDK6 stability via recruiting PCBP2. CDK6 knockdown abolished the inhibitory effects of TTN-AS1 overexpression on OGD/R-induced myocardial injury. Furthermore, overexpression of TTN-AS1 or ELF5 alleviated MI progression in mice by upregulating CDK6. Collectively, TTN-AS1 transcriptionally regulated by ELF5 alleviated myocardial apoptosis and injury during MI via recruiting PCBP2 to increase CDK6 stability, which shed new lights on exploring new strategies against MI.
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Affiliation(s)
- Yonglin Zhang
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Zhenglu Shang
- Department of Cardiology, Wuxi Huishan District People’s Hospital, Wuxi, Jiangsu Province, China
| | - Shucan Xu
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Guangzhi Zhou
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Aijun Liu
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
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Lin L, Chen Z, Li J, Peng J, Wang J, Feng M, Liu T, Zhang M, Wu X, Ai F, Shen C. Crocin alleviates neurotoxicity induced by bupivacaine in SH-SY5Y cells with inhibition of PI3K/AKT signaling. Genes Genomics 2024; 46:149-160. [PMID: 37523128 DOI: 10.1007/s13258-023-01431-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 07/03/2023] [Indexed: 08/01/2023]
Abstract
BACKGROUND Bupivacaine, a common local anesthetic, can cause neurotoxicity and permanent neurological disorders. Crocin has been widely reported as a potential neuroprotective agent in neural injury models. OBJECTIVE The aim of this study was to investigate the role and regulatory mechanism of crocin underlying bupivacaine-induced neurotoxicity. METHOD Human neuroblastoma SH-SY5Y cells were treated with bupivacaine and/or crocin for 24 h, followed by detecting cell viability using 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay. The effect of crocin or bupivacaine on SH-SY5Y cell proliferation was measured by Ki67 immunofluorescence assay. The levels of apoptosis-related proteins and the markers in the PI3K/Akt signaling pathway were examined using western blot analysis. The activities of caspase 3, catalase (CAT), superoxide dismutase (SOD), malondialdehyde (MDA) and glutathione peroxidase (GSH-Px) were tested using respective commercial assay kits. Flow cytometry analysis was executed for detecting SH-SY5Y cell apoptosis. RESULT Crocin attenuated bupivacaine-induced neurotoxicity in SH-SY5Y cells. Meanwhile, crocin inhibited SH-SY5Y cell apoptosis induced by bupivacaine via repressing the activity of caspase-3, reducing Bax expression, and elevating Bcl-2 expression. Moreover, crocin mitigated oxidative stress in SH-SY5Y cells by increasing the content of CAT, SOD, GSH-Px and reducing the content of MDA. Additionally, crocin protected against bupivacaine-induced dephosphorylation of Akt and GSK-3β. The protective effects of crocin against bupivacaine-induced neurotoxicity in SH-SY5Y cells were counteracted by the Akt inhibitor. CONCLUSION These results suggested that crocin may exert a neuroprotective function by promoting cell proliferation and suppressing apoptosis and oxidative stress in SH-SY5Y cells. Thus, crocin might become a promising drug for the treatment of bupivacaine-induced neurotoxicity.
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Affiliation(s)
- Lili Lin
- Department of Anesthesiology, Zongrui Hospital of Beilun, Ningbo, 315800, China
| | - Zhen Chen
- Department of Emergency, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, No. 26 Shengli Street, Jiang'an District, Wuhan, 430014, China
| | - Jun Li
- Department of Critical Care Medicine, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430014, China
| | - Jianye Peng
- Department of Cardiovascular Medicine, The Second Affiliated Hospital, Hengyang Medcial School, University of South China, Hengyang, 421099, China
| | - Jian Wang
- Department of Cardiology, The First Affiliated Hospital of Ningbo University, No.59 Liuting Street, Haishu District, Ningbo, 315010, China
| | - Mingjun Feng
- Department of Cardiology, The First Affiliated Hospital of Ningbo University, No.59 Liuting Street, Haishu District, Ningbo, 315010, China
| | - Tiancheng Liu
- Department of Emergency, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, No. 26 Shengli Street, Jiang'an District, Wuhan, 430014, China
| | - Mengli Zhang
- Department of Emergency, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, No. 26 Shengli Street, Jiang'an District, Wuhan, 430014, China
| | - Xian Wu
- Department of Emergency, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, No. 26 Shengli Street, Jiang'an District, Wuhan, 430014, China
| | - Fen Ai
- Department of Emergency, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, No. 26 Shengli Street, Jiang'an District, Wuhan, 430014, China.
| | - Caijie Shen
- Department of Cardiology, The First Affiliated Hospital of Ningbo University, No.59 Liuting Street, Haishu District, Ningbo, 315010, China.
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Wu L, Wei S, Pei D, Yao Y, Xiang Z, Yu E, Chen Z, Du Z, Qu S. Activation of the Akt Attenuates Ropivacaine-Induced Myelination Impairment in Spinal Cord and Sensory Dysfunction in Neonatal Rats. Mol Neurobiol 2023; 60:7009-7020. [PMID: 37523045 DOI: 10.1007/s12035-023-03498-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 07/11/2023] [Indexed: 08/01/2023]
Abstract
Prolonged exposure to local anesthetics (LAs) or intrathecal administration of high doses of LAs can cause spinal cord damage. Intraspinal administration of LAs is increasingly being used in children and neonates. Therefore, it is important to study LA-related spinal cord damage and the underlying mechanism in developmental models. First, neonatal Sprague-Dawley rats received three intrathecal injections of 0.5% ropivacaine, 1% ropivacaine, 2% ropivacaine or saline (90-min interval) on postnatal day 7. Electron microscopy, luxol fast blue staining and behavioral tests were performed to evaluate the spinal neurotoxicity caused by ropivacaine at different concentrations. Western blot analysis and immunostaining was performed to detect the expression changes of p-Akt, Akt, myelin gene regulatory factor (MYRF) and myelin basic protein (MBP) in the spinal cord treated with different concentrations of ropivacaine. Our results showed that 1% or 2% ropivacaine impaired myelination in the spinal cord and induced sensory dysfunction, but 0.5% ropivacaine did not. Moreover, 1% or 2% ropivacaine decreased the expression of p-Akt, MYRF and MBP in the spinal cord. Then, in order to further explore the role of these proteins in this model, the Akt-specific activator (SC79) was intraperitoneally injected 30 min before 2% ropivacaine treatment. Interestingly, SC79-mediated activation of Akt partly rescued ropivacaine-induced myelination impairments and sensory dysfunction. Overall, the results showed that ropivacaine caused spinal neurotoxicity in a dose-dependent manner in neonatal rats and that activation of the Akt partly rescued ropivacaine-induced these changes. These data provide insight into the neurotoxicity to the developing spinal cord caused by LAs.
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Affiliation(s)
- Lei Wu
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China
| | - Siwei Wei
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China
| | - Dongjie Pei
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China
| | - Yiyi Yao
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China
| | - Zhen Xiang
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China
| | - Eryou Yu
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China
| | - Zheng Chen
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China
| | - Zhen Du
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China.
| | - Shuangquan Qu
- Department of Anesthesiology, Hunan Children's Hospital, No.86 Ziyuan Rd, Changsha, 410007, Hunan, China.
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Minz R, Sharma PK, Negi A, Kesari KK. MicroRNAs-Based Theranostics against Anesthetic-Induced Neurotoxicity. Pharmaceutics 2023; 15:1833. [PMID: 37514018 PMCID: PMC10385075 DOI: 10.3390/pharmaceutics15071833] [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: 05/19/2023] [Revised: 06/21/2023] [Accepted: 06/25/2023] [Indexed: 07/30/2023] Open
Abstract
Various clinical reports indicate prolonged exposure to general anesthetic-induced neurotoxicity (in vitro and in vivo). Behavior changes (memory and cognition) are compilations commonly cited with general anesthetics. The ability of miRNAs to modulate gene expression, thereby selectively altering cellular functions, remains one of the emerging techniques in the recent decade. Importantly, engineered miRNAs (which are of the two categories, i.e., agomir and antagomir) to an extent found to mitigate neurotoxicity. Utilizing pre-designed synthetic miRNA oligos would be an ideal analeptic approach for intervention based on indicative parameters. This review demonstrates engineered miRNA's potential as prophylactics and/or therapeutics minimizing the general anesthetics-induced neurotoxicity. Furthermore, we share our thoughts regarding the current challenges and feasibility of using miRNAs as therapeutic agents to counteract the adverse neurological effects. Moreover, we discuss the scientific status and updates on the novel neuro-miRNAs related to therapy against neurotoxicity induced by amyloid beta (Aβ) and Parkinson's disease (PD).
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Affiliation(s)
- Roseleena Minz
- Department of Life Sciences, Central University of Jharkhand, Brambe, Ranchi 853205, Jharkhand, India
| | - Praveen Kumar Sharma
- Department of Life Sciences, Central University of Jharkhand, Brambe, Ranchi 853205, Jharkhand, India
| | - Arvind Negi
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland
| | - Kavindra Kumar Kesari
- Department of Applied Physics, School of Science, Aalto University, 02150 Espoo, Finland
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Resveratrol Suppresses Bupivacaine-Induced Spinal Neurotoxicity in Rats by Inhibiting Endoplasmic Reticulum Stress via SIRT1 Modulation. BIOMED RESEARCH INTERNATIONAL 2023; 2023:1176232. [PMID: 36865484 PMCID: PMC9974252 DOI: 10.1155/2023/1176232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/09/2022] [Accepted: 10/12/2022] [Indexed: 02/23/2023]
Abstract
Bupivacaine (BUP) may cause neurotoxic effects after spinal anesthesia. Resveratrol (RSV), a natural agonist of Silent information regulator 1 (SIRT1), protects various tissues and organs from damage by regulating endoplasmic reticulum (ER) stress. The aim of this study is to explore whether RSV could alleviate the neurotoxicity induced by bupivacaine via regulating ER stress. We established a model of bupivacaine-induced spinal neurotoxicity in rats using intrathecal injection of 5% bupivacaine. The protective effect of RSV was evaluated by injecting intrathecally with 30 μg/μL RSV in total of 10 μL per day for 4 consecutive days. On day 3 after bupivacaine administration, tail-flick latency (TFL) tests and the Basso, Beattie, and Bresnahan (BBB) locomotor scores were assessed to neurological function, and the lumbar enlargement of the spinal cord was obtained. H&E and Nissl staining were used to evaluate the histomorphological changes and the number of survival neurons. TUNEL staining was conducted to determine apoptotic cells. The expression of proteins was detected by IHC, immunofluorescence, and western blot. The mRNA level of SIRT1 was determined by RT-PCR. Bupivacaine caused spinal cord neurotoxicity by inducing cell apoptosis and triggering ER stress. RSV treatment promoted the recovery of neurological dysfunction after bupivacaine administration by suppressing neuronal apoptosis and ER stress. Furthermore, RSV upregulated SIRT1 expression and inhibited PERK signaling pathway activation. In summary, resveratrol suppresses bupivacaine-induced spinal neurotoxicity in rats by inhibiting endoplasmic reticulum stress via SIRT1 modulation.
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E Q, Wu Y, Liang X, Chen M, Peng J, Zhou Z, Wen X. Establishment of an animal model of sciatic nerve injury induced by local anesthetics. Hum Exp Toxicol 2023; 42:9603271231173382. [PMID: 37125703 DOI: 10.1177/09603271231173382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Peripheral neurotoxicity injury caused by local anesthetics is a common complication of clinical anesthesia. The study of its mechanism is helpful to prevent and treat the neurotoxic injury of local anesthetics. Previous studies on peripheral neurotoxicity injury caused by local anesthetics have mainly focused on in vitro cell experiments. Due to the lack of an animal model of peripheral neurotoxicity damage caused by local anesthetics, there are few in vivo experimental studies regarding this topic. Herein, 1% ropivacaine hydrochloride was injected into the sciatic nerve by direct incision and exposure of the sciatic nerve to create a local anesthetic neurotoxic injury model. The results showed that 1% ropivacaine hydrochloride could reduce the lower limb motor score and mechanical paw withdrawal threshold in mice 48 hours after injection. Pathological sections showed that 48 hours after treatment with 1% ropivacaine hydrochloride, the sciatic nerve showed increased axonal edema and degeneration, edema between nerve fiber bundles, increased degeneration of axon and myelin sheath vacuoles, edema of nerve bundle membrane and local degeneration and necrosis, and a large number of inflammatory cells around the nerve adventitia were soaked. The above results show that under open vision, 1% ropivacaine hydrochloride can cause injury to the sciatic nerve after 48 h of treatment, which can simulate the neurotoxic damage of local anesthetics. This animal model provides a research tool for studying the mechanism of neurotoxic injury caused by local anesthetics.
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Affiliation(s)
- Qi E
- Department of Anesthesiology, Foshan Perioperative Medical Engineering Technology Research Center, The Second People`s Hospital of Foshan and Affiliated Foshan Hospital of Southern Medical University, Foshan, China
| | - Yunlin Wu
- Graduate School, Guangdong Medical University, Zhanjiang, China
| | - Xiaoxia Liang
- Department of Anesthesiology, Foshan Perioperative Medical Engineering Technology Research Center, The Second People`s Hospital of Foshan and Affiliated Foshan Hospital of Southern Medical University, Foshan, China
| | - Meixin Chen
- Department of Anesthesiology, Foshan Perioperative Medical Engineering Technology Research Center, The Second People`s Hospital of Foshan and Affiliated Foshan Hospital of Southern Medical University, Foshan, China
| | - Jiayi Peng
- Department of Anesthesiology, Foshan Perioperative Medical Engineering Technology Research Center, The Second People`s Hospital of Foshan and Affiliated Foshan Hospital of Southern Medical University, Foshan, China
| | - Ziyin Zhou
- Department of Anesthesiology, Foshan Perioperative Medical Engineering Technology Research Center, The Second People`s Hospital of Foshan and Affiliated Foshan Hospital of Southern Medical University, Foshan, China
| | - Xianjie Wen
- Department of Anesthesiology, Foshan Perioperative Medical Engineering Technology Research Center, The Second People`s Hospital of Foshan and Affiliated Foshan Hospital of Southern Medical University, Foshan, China
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Ataei-Nazari S, Amoushahi M, Madsen JF, Jensen J, Heuck A, Mohammadi-Sangcheshmeh A, Lykke-Hartmann K. Cyclin-dependent kinase 6 (CDK6) as a potent regulator of the ovarian primordial-to-primary follicle transition. Front Cell Dev Biol 2022; 10:1036917. [PMID: 36619863 PMCID: PMC9816807 DOI: 10.3389/fcell.2022.1036917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022] Open
Abstract
Introduction: Ovarian follicle development requires tight coordination between several factors to initiate folliculogenesis to generate a mature and fertile egg. Studies have shown that cell cycle factors might contribute to follicle development, hover specific knowledge on individual CDKs and follicle activation has not been investigated. Among cell cycle regulators, CDK6 is a key player through binding to cyclin D resulting DNA synthesis and genome duplication. Interestingly, the CDK6 gene is differentially expressed in oocytes and granulosa cells from human primordial and primary follicles, which suggest a potential role of CDK6 in the primordial-to-primary transition. In this study, we investigated the potential regulatory role of CDK6 in progression of primordial to primary follicle transition using BSJ-03-123 (BSJ), a CDK6-specific degrader. Methods: In mouse ovarian in vitro culture, BSJ reduced the activation of primordial follicles, and reduced follicle development. As a next step, we examined the egg maturation read-out and found that BSJ-treated follicles matured to competent MII eggs with resumption of first meiosis, comparable with the control group. Results: Noteworthy, it appears that inhibition of CDK6 did increase number of apotoptic cells, articular in the granulosa cells, but had no impact on ROS level of cultured ovaries compared to control group, indicating that the cells were not stressed. Oocyte quality thus appeared safe. Discussion: The results of this study indicate that CDK6 plays a role in the primordial-to-primary transition, suggesting that cell cycle regulation is an essential part of ovarian follicle development.
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Affiliation(s)
- S. Ataei-Nazari
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - M. Amoushahi
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - JF. Madsen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - J. Jensen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - A. Heuck
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | - K. Lykke-Hartmann
- Department of Biomedicine, Aarhus University, Aarhus, Denmark,Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark,*Correspondence: K. Lykke-Hartmann,
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Wang J, Liu Z. Research progress on molecular mechanisms of general anesthetic-induced neurotoxicity and cognitive impairment in the developing brain. Front Neurol 2022; 13:1065976. [PMID: 36504660 PMCID: PMC9729288 DOI: 10.3389/fneur.2022.1065976] [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: 10/10/2022] [Accepted: 11/10/2022] [Indexed: 11/25/2022] Open
Abstract
General anesthetics-induced neurotoxicity and cognitive impairment in developing brains have become one of the current research hotspots in the medical science community. The underlying mechanisms are complex and involve various related molecular signaling pathways, cell mediators, autophagy, and other pathological processes. However, few drugs can be directly used to treat neurotoxicity and cognitive impairment caused by general anesthetics in clinical practice. This article reviews the molecular mechanism of general anesthesia-induced neurotoxicity and cognitive impairment in the neonatal brain after surgery in the hope of providing critical references for the treatments of clinical diseases.
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Affiliation(s)
- Jiaojiao Wang
- Department of Anesthesiology, Baotou Central Hospital, Baotou, China,Baotou Clinical Medical College, Inner Mongolia Medical University, Baotou, China
| | - Zhihui Liu
- Department of Anesthesiology, Baotou Central Hospital, Baotou, China,*Correspondence: Zhihui Liu
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Yousuf M, Shamsi A, Anjum F, Shafie A, Islam A, Haque QMR, Elasbali AM, Yadav DK, Hassan MI. Effect of pH on the structure and function of cyclin-dependent kinase 6. PLoS One 2022; 17:e0263693. [PMID: 35148332 PMCID: PMC8836317 DOI: 10.1371/journal.pone.0263693] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 01/25/2022] [Indexed: 12/15/2022] Open
Abstract
Cyclin-dependent kinase 6 (CDK6) is an important protein kinase that regulates cell growth, development, cell metabolism, inflammation, and apoptosis. Its overexpression is associated with reprogramming glucose metabolism through alternative pathways and apoptosis, which ultimately plays a significant role in cancer development. In the present study, we have investigated the structural and conformational changes in CDK6 at varying pH employing a multi-spectroscopic approach. Circular dichroism (CD) spectroscopy revealed at extremely acidic conditions (pH 2.0–4.0), the secondary structure of CDK6 got significantly disrupted, leading to aggregates formation. These aggregates were further characterized by employing Thioflavin T (ThT) fluorescence. No significant secondary structural changes were observed over the alkaline pH range (pH 7.0–11.0). Further, fluorescence and UV spectroscopy revealed that the tertiary structure of CDK6 was disrupted under extremely acidic conditions, with slight alteration occurring in mild acidic conditions. The tertiary structure remains intact over the entire alkaline range. Additionally, enzyme assay provided an insight into the functional aspect of CDK at varying pH; CDK6 activity was optimal in the pH range of 7.0–8.0. This study will provide a platform that provides newer insights into the pH-dependent dynamics and functional behavior of CDK6 in different CDK6 directed diseased conditions, viz. different types of cancers where changes in pH contribute to cancer development.
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Affiliation(s)
- Mohd Yousuf
- Department of Biosciences, Jamia Millia Islamia, New Delhi, India
| | - Anas Shamsi
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Farah Anjum
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - Alaa Shafie
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - Asimul Islam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | | | - Abdelbaset Mohamed Elasbali
- Clinical Laboratory Science, College of Applied Medical Sciences-Qurayyat, Jouf University, Sakaka, Saudi Arabia
| | - Dharmendra Kumar Yadav
- College of Pharmacy, Gachon University of Medicine and Science, Incheon City, South Korea
- * E-mail: (DKY); (MIH)
| | - Md. Imtaiyaz Hassan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
- * E-mail: (DKY); (MIH)
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