Buthina A. Al-Oudat, Bushra S. Abu Al fool, Suaad A. Audat, Nizar A. Al-Shar’i, Qosay A. Al-Balas, Aref Zayed, Amanda Bryant-Friedrich
{"title":"Structural optimization and biological evaluation of quinoline/naphthalene-based glyoxalase-I inhibitors as anti-cancer candidates","authors":"Buthina A. Al-Oudat, Bushra S. Abu Al fool, Suaad A. Audat, Nizar A. Al-Shar’i, Qosay A. Al-Balas, Aref Zayed, Amanda Bryant-Friedrich","doi":"10.1007/s00044-024-03289-x","DOIUrl":"10.1007/s00044-024-03289-x","url":null,"abstract":"<div><p>The glyoxalase system, inherent in mammalian cells, serves as a natural detoxification mechanism that regulates cytotoxic byproducts, especially methylglyoxal (MG). Consisting of glyoxalase I (Glo-I), glyoxalase II (Glo-II), and glutathione (GSH), this system plays a vital role in managing these harmful substances. Glo-I catalyzes the rate-limiting step in MG detoxification and is found to be overexpressed in different cancer types, rendering it a promising target for novel anticancer drugs. In a previous study, a series of diazenylbenzenesulfonamide derivatives were synthesized and evaluated for their activity against Glo-I. Among these compounds, <b>HA1</b>, <b>A1</b>, and <b>HA2</b> were identified as Glo-I inhibitors with IC<sub>50</sub> values of 1.36 ± 0.09, 1.36 ± 0.01, and 1.22 ± 0.07 µM, respectively, and were subsequently chosen as lead compounds for further investigation. In the present study, the lead compounds were subjected to structural optimization to develop more potent inhibitors. Various derivatives with distinct chemical features were synthesized and tested in vitro against Glo-I to establish their structure-activity relationship and determine the key interactions within the enzyme’s active site. Several compounds exhibited potent inhibitory activity with sub-micromolar IC<sub>50</sub> values. Notably, compound (E)-8-hydroxy-5-((4-(N-(thiazol-2-yl)sulfamoyl)phenyl)diazenyl)quinoline-2-carboxylic acid (<b>B9</b>) emerged as the most potent compound, with IC<sub>50</sub> value of 0.44 ± 0.06 µM. The structure-activity relationship analysis of compound <b>B9</b> underscored the significance of the 8-hydroxyquinoline moiety as well as the sulfathiazole moiety for its inhibitory activity. To gain deeper insights into the binding modes of the compounds within the enzyme’s active site, molecular docking studies were conducted, providing enhanced and accurate predictions.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"33 10","pages":"1897 - 1913"},"PeriodicalIF":2.6,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of LC-MS/MS methods affording identification and measurement of active metabolites in rat and dog plasma after oral dosing of a penta-ethyl ester prodrug of diethylenetriamine pentaacetic acid","authors":"John R. Kagel, Michael Jay, William C. Zamboni","doi":"10.1007/s00044-024-03264-6","DOIUrl":"https://doi.org/10.1007/s00044-024-03264-6","url":null,"abstract":"<p>C2E5, the penta-ethyl ester prodrug of radionuclide decorporation agent diethylenetriamine pentaacetic acid (DTPA), was designed to address the logistical challenges of IV administration of DTPA in a mass casualty setting. The in vivo conversion of orally-dosed C2E5 to DTPA was evaluated in rat and dog plasma samples using LC-MS/MS methods developed with reference materials and stable-label internal standards for both analytes. C2E5 instability in plasma ex vivo was identified and addressed, but when C2E5 dosed samples revealed minimal C2E5 and DTPA, it became crucial to identify metabolites produced by degradation of C2E5 in vivo that could account for therapeutic efficacy reported. Development of an LC-MS/MS method that identified and estimated levels of eight de-esterified metabolites of C2E5 was initiated without availability of corresponding reference material by relying on predictions of their analyte-specific LC-MS/MS properties. Four de-esterified analogs of C2E5, suspected as active metabolites, were identified in rat or dog plasma. When complementary isomers, not in samples but in reference materials (including impurities identified), became available, they were used to estimate levels of the metabolites identified in dosed samples. Results affording measurement of C2E5 and metabolites in rat and dog plasma provided fit-for-purpose information that supported a timely advancement of the DTPA prodrug program.</p>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"87 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Targeting selective inhibitors of PARPs in drug discovery and development","authors":"Maolin Duan, Jing Gao, Jiajin Li, Xiaoli Huang, Yijiu Ren, Yang Li, Mengya Liao, Yiwen Zhang","doi":"10.1007/s00044-024-03282-4","DOIUrl":"10.1007/s00044-024-03282-4","url":null,"abstract":"<div><p>Poly(ADP-ribose)polymerases (PARPs) have emerged as promising targets for the treatment of diseases, particularly in cancers, due to their significant biological functions involved in DNA damage. As a result, researchers worldwide have made substantial advances in this field. However, studies have revealed that PARPs inhibitors lack selectivity due to the conserved domain, limiting their clinical applications and emphasizing the need for selective inhibitors. In this perspective, we summarize the recent advancements in PARPs inhibitors, with a focus on selective inhibitors among PARP family. We discuss the designed strategy, structure-activity relationships, and crystal structure, while explaining the underlying mechanisms of selectivity, hoping to provide insights for the design of next generation of PARPs selective inhibitors.</p></div>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"33 10","pages":"1734 - 1756"},"PeriodicalIF":2.6,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141772101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kelsey E. Lubin, Zhuangyan (Monica) Xu, James P. Sluka, Gregory T. Knipp
{"title":"Development of an in vitro model of the neurovascular unit for BBB permeability-linked neuroactivity screening","authors":"Kelsey E. Lubin, Zhuangyan (Monica) Xu, James P. Sluka, Gregory T. Knipp","doi":"10.1007/s00044-024-03290-4","DOIUrl":"https://doi.org/10.1007/s00044-024-03290-4","url":null,"abstract":"<p>Many potential neurotherapeutic agents fail in the later stages during development due to insufficient blood-brain barrier (BBB) permeability or neurotoxic effects. To address this, we developed an in vitro model incorporating the neurovascular unit (NVU) — astrocytes, pericytes, neurons, and brain microvessel endothelial cells — designed to simulate the in vivo BBB and improve early drug screening. This model uses a direct contact triculture system enhanced by integrating SH-SY5Y neuron-like cells, enabling the study of permeability-linked neuronal responses. Our results show that this expanded NVU model, employing a Transwell® system, enhances the BBB’s restrictive properties and neuronal viability, potentially due to improved cell-cell signaling. Additionally, the model demonstrated increased efflux transporter expression, providing a more physiologically relevant assessment of neuroactivity in relation to BBB permeability. This innovative NVU model offers a predictive and robust tool for evaluating neurotherapeutic agents, facilitating the prioritization of candidates in large compound libraries and potentially reducing attrition rates in drug development. It represents a significant advancement in the methodology for early-stage neurotherapeutic screening, aligning in vitro findings more closely with in vivo responses.</p>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"27 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141772100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Twinkle I. Patel, Jay N. Joshi, Alexander J. Valvezan, Matthew J. Moschitto
{"title":"A review of trilaciclib, a first-in-class cyclin-dependent kinase 4/6 inhibitor, for the management of metastatic small-cell lung cancer","authors":"Twinkle I. Patel, Jay N. Joshi, Alexander J. Valvezan, Matthew J. Moschitto","doi":"10.1007/s00044-024-03288-y","DOIUrl":"10.1007/s00044-024-03288-y","url":null,"abstract":"<div><p>Cyclin-dependent kinases (CDKs) play a major role in regulating transitions within the cell cycle. Given the roles of CDK4/6 in promoting oncogenesis, selective inhibition of CDK4/6 has emerged as a novel approach for the treatment of breast cancer and various other tumors. While first and second generation CDK4/6 inhibitors were instrumental in targeting cell cycle pathways, they had numerous drawbacks such as limited selectivity and off-target effects. For that reason, a third generation of inhibitors was introduced and provided improved selectivity towards CDK4/6 leading to fewer side effects. To date, four compounds have been approved by the FDA as selective inhibitors of CDK4/6: palbociclib, ribociclib, abemaciclib, and trilaciclib. In this mini review, we summarize the biological, clinical, and chemical aspects of trilaciclib, a first-in-class CDK4/6 inhibitor notable for its dual role in cell cycle regulation and myelopreservation. Trilaciclib was granted FDA approval on February 2021, to improve the outcome of patients with metastatic-stage small cell lung cancer (SCLC) by protecting bone marrow suppression during chemotherapy.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"33 10","pages":"1757 - 1768"},"PeriodicalIF":2.6,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00044-024-03288-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141772102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Madhav Jadhav, Kishori Mali, Vikash Rajput, Rudradip Das, Amit Shard
{"title":"Exploring the decadal evolution of indolizine scaffold for anticancer innovations: a comprehensive analysis","authors":"Madhav Jadhav, Kishori Mali, Vikash Rajput, Rudradip Das, Amit Shard","doi":"10.1007/s00044-024-03280-6","DOIUrl":"10.1007/s00044-024-03280-6","url":null,"abstract":"<div><p>Cancer, a term encompassing a diverse group of diseases, is characterized by uncontrolled cell growth that disrupts normal bodily functions. It remains a major global health concern, claiming millions of lives annually. The causes of cancer are complex and multifaceted, involving lifestyle choices, genetics, and environmental factors. Many FDA-approved drugs feature heterocyclic cores due to their promising pharmacological properties. Notable anticancer agents include doxorubicin, daunorubicin, 5-fluorouracil, methotrexate, vinblastine, and vincristine. Indolizine, a heterocyclic compound with the formula C<sub>8</sub>H<sub>7</sub>N, stands out as a privileged scaffold in medicinal chemistry. This unique isomer of indole, with nitrogen located at a ring fusion position fused to a six-membered benzene ring, has emerged as a potent candidate for anticancer drug development. This review explores the structure-activity relationship (SAR) studies of various indolizine derivatives, highlighting their potential in targeting diverse cancer types. The review comprehensively analyzes the synthetic pathways employed to create potent indolizine derivatives, focusing on methods such as one-pot reactions, domino reactions, and other innovative approaches. Additionally, it critically examines the biological assays used to evaluate the anticancer activity of indolizine derivatives, providing a quantitative understanding of their potency against various cancer cell lines. Emphasizing different cancer types, including breast, lung, liver, and colorectal cancer, this review underscores the oncotherapeutic significance of indolizine derivatives.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Indolizines are one of the heterocycles widely evaluated in oncotherapeutics. Different categories of indolizines are utilized for the treatment of cancers. This report aims to cover all these findings over the last decade and cumulate them into a single record.</p></div></div></figure></div></div>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"33 9","pages":"1491 - 1510"},"PeriodicalIF":2.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141772103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Characterization of Allium tuberosum Rottl. peptides with dual inhibitory activities against angiotensin I converting enzyme and dipeptidyl peptidase-IV","authors":"Nhung Thi Phuong Nong, Chia-Hui Lee, Jue-Liang Hsu","doi":"10.1007/s00044-024-03284-2","DOIUrl":"10.1007/s00044-024-03284-2","url":null,"abstract":"<div><p>Two peptides with dual functionality, namely LLPSY and NAPALVY, exhibit inhibitory effects on both angiotensin-I-converting enzyme (ACE) and dipeptidyl peptidase-IV (DPP-IV), were successfully identified from the hydrolysates of Chinese chive seed (<i>Allium tuberosum</i> Rottl.). Peptide isolation involved reversed-phase chromatography, and peptide sequences were characterized through liquid chromatography-tandem mass spectrometry analysis and de novo sequencing. Notably, the Lineweaver-Burk plot analysis revealed that LLPSY (IC<sub>50</sub>: 15.66 ± 1.11 µM) acted in a non-competitive manner, whereas NAPALVY (IC<sub>50</sub>: 3.42 ± 0.79 µM) exhibited competitive inhibition, potently inhibiting ACE. Their stability tests against ACE further revealed that LLPSY acted as a real substrate, while NAPALVY functioned as a true inhibitor of ACE. In terms of DPP-IV inhibition, LLPSY (IC<sub>50</sub>: 2.48 ± 0.10 mM) was identified as a competitive inhibitor, whereas NAPALVY (IC<sub>50</sub>: 7.63 ± 0.52 mM) displayed noncompetitive inhibition. Both peptides exhibited true inhibitory effects on DPP-IV. Docking simulations provided insights into peptide-enzyme interactions. These novel <i>Allium tuberosum Rottl.</i>-derived peptides hold promise for controlling blood pressure and blood glucose.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"33 10","pages":"1838 - 1853"},"PeriodicalIF":2.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maryké Shaw, Jacobus P. Petzer, Theunis T. Cloete, Anél Petzer
{"title":"Synthesis and evaluation of 2-methylbenzothiazole derivatives as monoamine oxidase inhibitors","authors":"Maryké Shaw, Jacobus P. Petzer, Theunis T. Cloete, Anél Petzer","doi":"10.1007/s00044-024-03283-3","DOIUrl":"10.1007/s00044-024-03283-3","url":null,"abstract":"<div><p>Neurodegenerative disorders are caused by the progressive death of neuronal cells in specific regions of the brain and spinal cord. The most common neurodegenerative disorders are Alzheimer’s disease and Parkinson’s disease. The inhibition of enzymes that metabolise neurotransmitter amines is an important approach in the treatment of these disorders and monoamine oxidase (MAO) B inhibitors have thus been used for the treatment of Parkinson’s disease. Inhibitors of the MAO-A isoform, in turn, are used clinically for the treatment of affective (e.g., major depression) and anxiety disorders. Recent studies have shown that benzothiazole derivatives act as potent MAO inhibitors. Based on these findings, the present study group synthesised thirteen 2-methylbenzo[<i>d</i>]thiazole derivatives and evaluated their in vitro MAO inhibition properties. The results showed that the benzothiazole derivatives were potent and selective inhibitors of human MAO-B, with all compounds exhibiting IC<sub>50</sub> values < 0.017 µM. The most potent MAO-B inhibitor (<b>4d</b>) had an IC<sub>50</sub> value of 0.0046 µM, while the most potent MAO-A inhibitor (<b>5e</b>) had an IC<sub>50</sub> value of 0.132 µM. It may be concluded that active benzothiazole derivatives may serve as potential leads for the development of MAO inhibitors for the treatment of neuropsychiatric and neurodegenerative disorders.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"33 10","pages":"1829 - 1837"},"PeriodicalIF":2.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00044-024-03283-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141772104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and discovery of monopolar spindle kinase 1 (MPS1/TTK) inhibitors by computational approaches","authors":"Nan Li, Jianning Wang, Haiyue Wu, Zhichao Zheng, Wei Liu, Zijian Qin","doi":"10.1007/s00044-024-03286-0","DOIUrl":"10.1007/s00044-024-03286-0","url":null,"abstract":"<div><p>Monopolar spindle kinase 1 (MPS1, also called TTK) is an attractive target for the treatment of cancers. Five MPS1 inhibitors have entered the clinical trials, but four of them were discontinued; thus, it is necessary to develop MPS1 inhibitors with novel scaffolds. In the present work, several computational tools were built to design MPS1 inhibitors. The deep recurrent neural network was used for generating potential highly active MPS1 inhibitors. The deep neural network was used to build a ligand-based consensus model for distinguishing the highly and weakly active MPS1 inhibitors. Five co-crystal structures were used to develop the consensus docking score for distinguishing actives and decoys. The ligand-based consensus model and the consensus docking score were used to evaluate the generated molecules, and finally, two scaffolds, which were less reported as MPS1 inhibitors previously, were selected. A total of 15 compounds with the two scaffolds were synthesized and tested by in vitro enzymatic inhibition assays. Five compounds had sub-micromolar to low micromolar in vitro potencies, and the most active compound was <b>10</b> with an IC<sub>50</sub> of 556 nM. The binding modes of the new compounds were revealed by molecular dynamic simulations. We believe that the computational strategies in the present work were helpful for discovering new potential scaffolds.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"33 10","pages":"1861 - 1886"},"PeriodicalIF":2.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Satish Bhawsar, Mohammad Shaikh, Sanjeev Joshi, Amit Mishra, Laxmikant Pavase, Vijay Chavan, Amol Kale, Abhijeet K. Kayastha, Ravindra Yeole, Sachin Bhagwat, Mahesh Patel
{"title":"Synthesis and evaluation of novel biaryl oxazolidinones effective against gram-positive bacterial infections","authors":"Satish Bhawsar, Mohammad Shaikh, Sanjeev Joshi, Amit Mishra, Laxmikant Pavase, Vijay Chavan, Amol Kale, Abhijeet K. Kayastha, Ravindra Yeole, Sachin Bhagwat, Mahesh Patel","doi":"10.1007/s00044-024-03287-z","DOIUrl":"10.1007/s00044-024-03287-z","url":null,"abstract":"<div><p>Oxazolidinones are synthetic antibiotic class of compounds characterized by chemical structure, cyclic carbamate with ‘<i>S’</i> configuration of substituent at <i>C</i>-5 position. The synthesis of oxazolidinones has gained increasing interest due to their unique mechanism of action that assures high antibiotic efficiency and low susceptibility to resistance mechanisms. Biaryl oxazolidinones are second-generation oxazolidinone (e.g. Tedizolid) having potency against multidrug-resistant (MDR) gram-positive pathogens including <i>MRSA</i>, <i>VRE</i>, penicillin-resistant <i>S. pneumoniae</i> and linezolid-resistant strains. The current manuscript covers structure activity based synthesis of 21 oxazolidinone analogs prepared through various chemical modifications. These novel biaryl oxazolidinones are prepared with the objective to increase spectrum of activity against multidrug-resistant Gram-positive bacteria.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":699,"journal":{"name":"Medicinal Chemistry Research","volume":"33 10","pages":"1887 - 1896"},"PeriodicalIF":2.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}