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  1. Article ; Online: Computational drug discovery on human immunodeficiency virus with a customized long short-term memory variational autoencoder deep-learning architecture.

    Kutsal, Mucahit / Ucar, Ferhat / Kati, Nida

    CPT: pharmacometrics & systems pharmacology

    2023  Volume 13, Issue 2, Page(s) 308–316

    Abstract: Despite attempts to control the spread of human immunodeficiency virus (HIV) through the use of anti-HIV medications, the absence of an effective vaccine continues to present a significant obstacle. In addition, the development of drug resistance by HIV ... ...

    Abstract Despite attempts to control the spread of human immunodeficiency virus (HIV) through the use of anti-HIV medications, the absence of an effective vaccine continues to present a significant obstacle. In addition, the development of drug resistance by HIV underscores the necessity for computational drug discovery methods to identify novel therapies. This investigation specifically focused on employing a long short-term memory (LSTM) variational autoencoder deep-learning architecture for computational drug discovery in relation to HIV. Our data set comprised simplified molecular input line entry system (SMILES)-encoded compounds, which were used to train the LSTM autoencoder. Remarkably, our model achieved a training accuracy of 91%, with a data set containing 1377 compounds. Leveraging the generative model derived from the training phase, we generated potential new drugs for combating HIV and assessed their interaction with the virus using a previously developed artificial intelligence model. Lastly, we verified the drug likeliness of our computationally generated compounds in accordance with Lipinski's rule of five. Overall, our study presents a promising approach to computational drug discovery in the ongoing battle against HIV.
    MeSH term(s) Humans ; Artificial Intelligence ; Deep Learning ; HIV ; Memory, Short-Term ; Drug Discovery/methods ; HIV Infections/drug therapy
    Language English
    Publishing date 2023-12-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2697010-7
    ISSN 2163-8306 ; 2163-8306
    ISSN (online) 2163-8306
    ISSN 2163-8306
    DOI 10.1002/psp4.13085
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: COVIDiagnosis-Net: Deep Bayes-SqueezeNet based diagnosis of the coronavirus disease 2019 (COVID-19) from X-ray images.

    Ucar, Ferhat / Korkmaz, Deniz

    Medical hypotheses

    2020  Volume 140, Page(s) 109761

    Abstract: The Coronavirus Disease 2019 (COVID-19) outbreak has a tremendous impact on global health and the daily life of people still living in more than two hundred countries. The crucial action to gain the force in the fight of COVID-19 is to have powerful ... ...

    Abstract The Coronavirus Disease 2019 (COVID-19) outbreak has a tremendous impact on global health and the daily life of people still living in more than two hundred countries. The crucial action to gain the force in the fight of COVID-19 is to have powerful monitoring of the site forming infected patients. Most of the initial tests rely on detecting the genetic material of the coronavirus, and they have a poor detection rate with the time-consuming operation. In the ongoing process, radiological imaging is also preferred where chest X-rays are highlighted in the diagnosis. Early studies express the patients with an abnormality in chest X-rays pointing to the presence of the COVID-19. On this motivation, there are several studies cover the deep learning-based solutions to detect the COVID-19 using chest X-rays. A part of the existing studies use non-public datasets, others perform on complicated Artificial Intelligent (AI) structures. In our study, we demonstrate an AI-based structure to outperform the existing studies. The SqueezeNet that comes forward with its light network design is tuned for the COVID-19 diagnosis with Bayesian optimization additive. Fine-tuned hyperparameters and augmented dataset make the proposed network perform much better than existing network designs and to obtain a higher COVID-19 diagnosis accuracy.
    MeSH term(s) Algorithms ; Artificial Intelligence ; Bayes Theorem ; Betacoronavirus ; COVID-19 ; Coronavirus Infections/diagnostic imaging ; Datasets as Topic ; Deep Learning ; Humans ; Image Interpretation, Computer-Assisted ; Image Processing, Computer-Assisted ; Models, Statistical ; Neural Networks, Computer ; Pandemics ; Pneumonia, Viral/diagnostic imaging ; Probability ; Radiography, Thoracic ; SARS-CoV-2 ; X-Rays
    Keywords covid19
    Language English
    Publishing date 2020-04-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 193145-3
    ISSN 1532-2777 ; 0306-9877
    ISSN (online) 1532-2777
    ISSN 0306-9877
    DOI 10.1016/j.mehy.2020.109761
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: COVIDiagnosis-Net

    Ucar, Ferhat / Korkmaz, Deniz

    Medical Hypotheses

    Deep Bayes-SqueezeNet based diagnosis of the coronavirus disease 2019 (COVID-19) from X-ray images

    2020  Volume 140, Page(s) 109761

    Keywords General Medicine ; covid19
    Language English
    Publisher Elsevier BV
    Publishing country us
    Document type Article ; Online
    ZDB-ID 193145-3
    ISSN 1532-2777 ; 0306-9877
    ISSN (online) 1532-2777
    ISSN 0306-9877
    DOI 10.1016/j.mehy.2020.109761
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article: A novel approach to investigate the effects of global warming and exchange rate on the solar power plants

    Gürtürk, Mert / Ucar, Ferhat / Erdem, Murat

    Energy. 2022 Jan. 15, v. 239

    2022  

    Abstract: The present study proposes novel approaches to concepts such as risk assessment and investment management in investments in solar power plants. In this context, 11 cities in Turkey have been taken into consideration for solar energy investment. Global ... ...

    Abstract The present study proposes novel approaches to concepts such as risk assessment and investment management in investments in solar power plants. In this context, 11 cities in Turkey have been taken into consideration for solar energy investment. Global warming is also one of the current issues on the World's agenda. The monthly impact of global warming has been investigated for 5 years using a deep learning model, and the effects of global warming on cost have been determined within the scope of this study. Concerning the outputs of the designed deep learning-based temperature-forecasting model, it was observed that the gain values might decrease between 5.98% and 3.74% due to the possible global warming effects in 2025–2030. Also, changes in the US$/TL ratio put solar energy investors in a difficult position. The Turkish government issued a Presidential Decree numbered 3453 on January 30, 2021, to offer a solution to this situation. The profit-loss situation of solar energy investments was investigated with the issued support policy and fixed price-purchasing policy. It has been observed that the fixed price policy is not sustainable and the new support system partially protects the solar energy investor.
    Keywords energy ; issues and policy ; models ; prices ; risk assessment ; solar energy
    Language English
    Dates of publication 2022-0115
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2019804-8
    ISSN 0360-5442 ; 0360-5442
    ISSN (online) 0360-5442
    ISSN 0360-5442
    DOI 10.1016/j.energy.2021.122344
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: COVIDiagnosis-Net: Deep Bayes-SqueezeNet based diagnosis of the coronavirus disease 2019 (COVID-19) from X-ray images

    Ucar, Ferhat / Korkmaz, Deniz

    Med Hypotheses

    Abstract: The Coronavirus Disease 2019 (COVID-19) outbreak has a tremendous impact on global health and the daily life of people still living in more than two hundred countries. The crucial action to gain the force in the fight of COVID-19 is to have powerful ... ...

    Abstract The Coronavirus Disease 2019 (COVID-19) outbreak has a tremendous impact on global health and the daily life of people still living in more than two hundred countries. The crucial action to gain the force in the fight of COVID-19 is to have powerful monitoring of the site forming infected patients. Most of the initial tests rely on detecting the genetic material of the coronavirus, and they have a poor detection rate with the time-consuming operation. In the ongoing process, radiological imaging is also preferred where chest X-rays are highlighted in the diagnosis. Early studies express the patients with an abnormality in chest X-rays pointing to the presence of the COVID-19. On this motivation, there are several studies cover the deep learning-based solutions to detect the COVID-19 using chest X-rays. A part of the existing studies use non-public datasets, others perform on complicated Artificial Intelligent (AI) structures. In our study, we demonstrate an AI-based structure to outperform the existing studies. The SqueezeNet that comes forward with its light network design is tuned for the COVID-19 diagnosis with Bayesian optimization additive. Fine-tuned hyperparameters and augmented dataset make the proposed network perform much better than existing network designs and to obtain a higher COVID-19 diagnosis accuracy.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #143476
    Database COVID19

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  6. Article ; Online: Baseline Characteristics of a Patient Cohort and Predictors of In-hospital MORtality in CORonary Care Units (MORCOR-TURK) Trial in Türkiye.

    Yılmaz, Ahmet Seyda / Kahraman, Fatih / Ersoy, İbrahim / Taylan, Gökay / Kaya, Emin Erdem / Aydın, Ertan / Karakayalı, Muammer / Öğütveren, Muhammet Mürsel / Taşdelen, Aybike Gül / Kümet, Ömer / Gül, Murat / Nurkoç, Serdar Gökhan / Atan, Şeyhmus / Özgeyik, Mehmet / Kılıç, Oğuz / Toprak, Aslıhan Merve / Özbek, Mehmet / Kertmen, Ömer / Şafak, Özgen /
    Mert, Gurbet Özge / Demir, Mevlüt / Yavuz, Yunus Emre / Keleşoğlu, Şaban / Uçar, Melisa / Işık, İsmail Barkın / Öncel, Can Ramazan / Cengil, Muhammed Erkam / Küçük, Uğur / Dindaş, Ferhat / Altınsoy, Meltem / Akkaya, Fatih

    Turk Kardiyoloji Dernegi arsivi : Turk Kardiyoloji Derneginin yayin organidir

    2024  Volume 52, Issue 3, Page(s) 175–181

    Abstract: Objective: The MORtality in CORonary Care Units in Türkiye (MORCOR-TURK) trial is a national registry evaluating predictors and rates of in-hospital mortality in coronary care unit (CCU) patients in Türkiye. This report describes the baseline ... ...

    Title translation Türkiye'de Koroner Yoğun Bakım Ünitelerindeki Hastane İçi Mortalite (MORCOR-TURK) Çalışmasında Hasta Temel Karakteristikleri ve Öngördürücüleri.
    Abstract Objective: The MORtality in CORonary Care Units in Türkiye (MORCOR-TURK) trial is a national registry evaluating predictors and rates of in-hospital mortality in coronary care unit (CCU) patients in Türkiye. This report describes the baseline demographic characteristics of patients recruited for the MORCOR-TURK trial.
    Methods: The study is a multicenter, cross-sectional, prospective national registry that included 50 centers capable of 24-hour CCU service, selected from all seven geographic regions of Türkiye. All consecutive patients admitted to CCUs with cardiovascular emergencies between September 1-30, 2022, were prospectively enrolled. Baseline demographic characteristics, admission diagnoses, laboratory data, and cardiovascular risk factors were recorded.
    Results: A total of 3,157 patients with a mean age of 65 years (range: 56-73) and 2,087 (66.1%) males were included in the analysis. Patients with arterial hypertension [1,864 patients (59%)], diabetes mellitus (DM) [1,184 (37.5%)], hyperlipidemia [1,120 (35.5%)], and smoking [1,093 (34.6%)] were noted. Non-ST elevation myocardial infarction (NSTEMI) was the leading cause of admission [1,187 patients (37.6%)], followed by ST elevation myocardial infarction (STEMI) in 742 patients (23.5%). Other frequent diagnoses included decompensated heart failure (HF) [339 patients (10.7%)] and arrhythmia [272 patients (8.6%)], respectively. Atrial fibrillation (AF) was the most common pathological rhythm [442 patients (14%)], and chest pain was the most common primary complaint [2,173 patients (68.8%)].
    Conclusion: The most common admission diagnosis was acute coronary syndrome (ACS), particularly NSTEMI. Hypertension and DM were found to be the two leading risk factors, and AF was the most commonly seen pathological rhythm in all hospitalized patients. These findings may be useful in understanding the characteristics of patients admitted to CCUs and thus in taking precautions to decrease CCU admissions.
    MeSH term(s) Aged ; Female ; Humans ; Male ; Atrial Fibrillation ; Coronary Care Units ; Cross-Sectional Studies ; Hospital Mortality ; Hypertension ; Non-ST Elevated Myocardial Infarction ; Prospective Studies ; Turkey ; Middle Aged
    Language English
    Publishing date 2024-04-04
    Publishing country Turkey
    Document type Clinical Trial ; Journal Article ; Multicenter Study
    ZDB-ID 1215217-1
    ISSN 1308-4488 ; 1016-5169
    ISSN (online) 1308-4488
    ISSN 1016-5169
    DOI 10.5543/tkda.2023.67505
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Does primary tumor resection contribute to overall survival in unresectable synchronous metastatic colorectal cancer?

    Ergun, Yakup / Bal, Oznur / Dogan, Mutlu / Ucar, Gokhan / Dirikoc, Merve / Acikgoz, Yusuf / Bacaksiz, Ferhat / Uncu, Dogan

    Journal of research in medical sciences : the official journal of Isfahan University of Medical Sciences

    2020  Volume 25, Page(s) 14

    Abstract: Background: Primary tumor resection (PTR) in metastatic colorectal cancer (mCRC) has not been suggested by guidelines, since new systemic chemotherapy options have improved overall survival. However, the effect of PTR is still controversial in mCRC. In ... ...

    Abstract Background: Primary tumor resection (PTR) in metastatic colorectal cancer (mCRC) has not been suggested by guidelines, since new systemic chemotherapy options have improved overall survival. However, the effect of PTR is still controversial in mCRC. In this study, we aimed to evaluate the effect of PTR on survival in unresectable mCRC.
    Materials and methods: Two hundred and fifty-two patients with unresectable mCRC were screened retrospectively between January 2007 and December 2017 and a total of 147 patients who met inclusion criteria were included. The patients with emergency or elective PTR and the patients without surgery were compared for baseline features and overall survival.
    Results: The median follow-up time was 15.6 months (range; 1.2-78.9) in whole patients. There were 91 patients in nonsurgical (NS) group and 56 patients in PTR group. The median overall survival was significantly longer in PTR group compared NS group (21.8 vs. 17.0 months,
    Conclusion: PTR did not offer an overall survival benefit in this study. Although it is debated, we think that it is better to start treatment with chemotherapy and biological agent combinations in patients with asymptomatic mCRC. Thus, the patients can be protected from the morbidity and mortality of the surgery.
    Language English
    Publishing date 2020-02-20
    Publishing country India
    Document type Journal Article
    ZDB-ID 2513029-8
    ISSN 1735-7136 ; 1735-1995
    ISSN (online) 1735-7136
    ISSN 1735-1995
    DOI 10.4103/jrms.JRMS_1056_18
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Takayasu's arteritis: associated inflammatory diseases.

    Esatoglu, Sinem Nihal / Ok, Ayse Merve / Ucar, Didar / Celik, Aykut Ferhat / Ugurlu, Serdal / Hamuryudan, Vedat / Yazici, Hasan / Seyahi, Emire

    Clinical and experimental rheumatology

    2020  Volume 38 Suppl 124, Issue 2, Page(s) 61–68

    Abstract: Objectives: Case reports and series suggest that Takayasu's arteritis (TAK) can co-exist with other inflammatory disorders. We conducted a formal study to look specifically at the frequency of such inflammatory disorders in a large cohort of TAK ... ...

    Abstract Objectives: Case reports and series suggest that Takayasu's arteritis (TAK) can co-exist with other inflammatory disorders. We conducted a formal study to look specifically at the frequency of such inflammatory disorders in a large cohort of TAK followed by a single tertiary centre.
    Methods: There were 238 patients registered with a diagnosis of TAK. Of these, 19 died, 18 were lost to follow-up and 3 did not wish to respond to our questionnaire. The remaining 198 (175 F/23 M) patients were called back at the outpatient clinic. A standardised form sought whether the patient was also diagnosed with inflammatory bowel disease (IBD), ankylosing spondylitis (AS), Behçet's syndrome (BS), autoimmune or any other inflammatory disorder. The presence of skin-mucosa lesions, inflammatory eye disease and inflammatory back pain were also specifically sought for.
    Results: We identified 37 (19%) patients with inflammatory bowel disease (n=12, 6%), ankylosing spondylitis (n=15, 8%) or Behçet's syndrome (n=10, 5%). Thirteen (6.5%) patients had systemic or localised autoimmune disease and 9 (4.5%) miscellaneous inflammatory diseases. Among the 139 patients without any concomitant disease, inflammatory back pain (n=49, 35%) was the most common feature, followed by recurrent oral ulcer (n=20, 14%) erythema nodosum (n=17, 12%), arthritis (n=12, 9%) papulopustular lesions (n=8, 6%) and uveitis/scleritis (n=6, 4%). Only 64 patients (32%) did not have any concomitant disease/condition or specific clinical feature.
    Conclusions: TAK does co-occur with IBD, AS and less frequently with BS in about 1/5 of the patients, at least in a hospital setting. There is no clear temporal pattern. The high prevalence of inflammatory back pain in the dorsal spine in TAK needs further scrutiny.
    MeSH term(s) Autoimmune Diseases/complications ; Behcet Syndrome/complications ; Cohort Studies ; Female ; Humans ; Inflammatory Bowel Diseases/complications ; Male ; Spondylitis, Ankylosing/complications ; Takayasu Arteritis/complications
    Language English
    Publishing date 2020-01-14
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 605886-3
    ISSN 1593-098X ; 0392-856X
    ISSN (online) 1593-098X
    ISSN 0392-856X
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Does primary tumor resection contribute to overall survival in unresectable synchronous metastatic colorectal cancer?

    Yakup Ergun / Oznur Bal / Mutlu Dogan / Gokhan Ucar / Merve Dirikoc / Yusuf Acikgoz / Ferhat Bacaksiz / Dogan Uncu

    Journal of Research in Medical Sciences, Vol 25, Iss 1, Pp 14-

    2020  Volume 14

    Abstract: Background: Primary tumor resection (PTR) in metastatic colorectal cancer (mCRC) has not been suggested by guidelines, since new systemic chemotherapy options have improved overall survival. However, the effect of PTR is still controversial in mCRC. In ... ...

    Abstract Background: Primary tumor resection (PTR) in metastatic colorectal cancer (mCRC) has not been suggested by guidelines, since new systemic chemotherapy options have improved overall survival. However, the effect of PTR is still controversial in mCRC. In this study, we aimed to evaluate the effect of PTR on survival in unresectable mCRC. Materials and Methods: Two hundred and fifty-two patients with unresectable mCRC were screened retrospectively between January 2007 and December 2017 and a total of 147 patients who met inclusion criteria were included. The patients with emergency or elective PTR and the patients without surgery were compared for baseline features and overall survival. Results: The median follow-up time was 15.6 months (range; 1.2–78.9) in whole patients. There were 91 patients in nonsurgical (NS) group and 56 patients in PTR group. The median overall survival was significantly longer in PTR group compared NS group (21.8 vs. 17.0 months, P = 0.01), but it was not associated to better overall survival in multivariate Cox analysis (hazard ratio: 0.65, 95% confidence interval: 0.41–1.02, P = 0.06). There was no significant difference in overall survival between emergency and elective surgery subgroups (22.9 vs. 16.1 months, respectively, P = 0.9). Conclusion: PTR did not offer an overall survival benefit in this study. Although it is debated, we think that it is better to start treatment with chemotherapy and biological agent combinations in patients with asymptomatic mCRC. Thus, the patients can be protected from the morbidity and mortality of the surgery.
    Keywords colectomy ; colorectal cancer ; metastatic ; palliative surgery ; survival ; Medicine ; R
    Subject code 610 ; 616
    Language English
    Publishing date 2020-01-01T00:00:00Z
    Publisher Wolters Kluwer Medknow Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Emergence of new manifestations during infliximab treatment in Behçet's syndrome.

    Tukek, Nur Beyza / Esatoglu, Sinem Nihal / Hatemi, Gulen / Calıskan, Elif Buse / Ozyazgan, Yılmaz / Ucar, Didar / Ozguler, Yesim / Seyahi, Emire / Melikoglu, Melike / Uygunoglu, Ugur / Siva, Aksel / Kutlubay, Zekayi / Hatemi, İbrahim / Celik, Aykut Ferhat / Ugurlu, Serdal / Fresko, Izzet / Yurdakul, Sebahattin / Yazici, Hasan / Hamuryudan, Vedat

    Rheumatology (Oxford, England)

    2021  Volume 61, Issue 9, Page(s) 3746–3753

    Abstract: Objectives: Infliximab (IFX) is increasingly being used for the treatment of severe manifestations of Behçet's syndrome (BS). However, emergence of new manifestations has also been occasionally reported during IFX treatment. We aimed to assess the ... ...

    Abstract Objectives: Infliximab (IFX) is increasingly being used for the treatment of severe manifestations of Behçet's syndrome (BS). However, emergence of new manifestations has also been occasionally reported during IFX treatment. We aimed to assess the frequency of new manifestations in our BS patients treated with IFX.
    Methods: A chart review was conducted to identify all BS patients treated with IFX in our clinic between 2004 and 2020. Demographic data, indications for IFX initiation, concomitant treatments and outcomes were recorded. A new manifestation was defined as the emergence of a new organ involvement or mucocutaneous manifestation developing for the first time during IFX treatment or within 12 weeks after the last infusion of IFX.
    Results: Among our 282 patients who used IFX, 19 (7%) patients had developed a total of 23 new manifestations during a mean follow-up of 20.0 (15.3) months. Patients with vascular involvement were more likely to develop a new manifestation (12/19, 63%). Initial manifestations that required IFX were in remission at the time of new manifestation in 14/19 patients. IFX treatment was intensified (n = 6) and/or glucocorticoids, immunosuppressives or colchicine was added to IFX (n = 21). IFX was switched to another agent for the remaining manifestations (n = 8). These treatment modifications led to remission in 17/19 patients.
    Conclusion: New manifestations developed during IFX treatment in 7% of our patients with BS. They could be managed by intensifying IFX treatment or adding other agents in the majority of these manifestations.
    MeSH term(s) Behcet Syndrome/complications ; Behcet Syndrome/drug therapy ; Colchicine/therapeutic use ; Humans ; Immunosuppressive Agents/therapeutic use ; Infliximab/adverse effects ; Treatment Outcome
    Chemical Substances Immunosuppressive Agents ; Infliximab (B72HH48FLU) ; Colchicine (SML2Y3J35T)
    Language English
    Publishing date 2021-12-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 1464822-2
    ISSN 1462-0332 ; 1462-0324
    ISSN (online) 1462-0332
    ISSN 1462-0324
    DOI 10.1093/rheumatology/keab944
    Database MEDical Literature Analysis and Retrieval System OnLINE

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