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Akbulut K, Keskin-Aktan A, Abgarmi S, Akbulut H. The role of SIRT2 inhibition on the aging process of brain in male rats. Aging Brain 2023; 4:100087. [PMID: 37519449 PMCID: PMC10372168 DOI: 10.1016/j.nbas.2023.100087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 07/09/2023] [Accepted: 07/10/2023] [Indexed: 08/01/2023] Open
Abstract
Background Though the exact mechanisms regarding brain aging and its relation to neurodegenerative disorders are not precise, oxidative stress, the key regulators of apoptosis and autophagy, such as bcl-2 and beclin 1, seem to be the potential players in the aging of the cerebral cortex and hippocampus. As a type of nicotinamide adenine dinucleotide (NAD+)-dependent deacetylases, sirtuin 2 (SIRT2) has been associated to age-related diseases. However, the exact role of SIRT2 in brain aging is not well studied. The objective of the current study was to study the role of SIRT2 inhibition on brain aging through the neuroprotective mechanisms. Methods We tested the effects of AGK-2, a SIRT2 inhibitor, on oxidative stress parameters, apoptosis and autophagy regulators including bcl-2, bax, beclin1 in young and old rats. 24 Wistar albino rats (3 months-old and 22 months-old) were divided into four groups; Young-Control (4% DMSO+PBS), Young-AGK-2 (10 µM/bw, ip), Aged-Control, and Aged-AGK-2. Following the 30 days of drug administration period the rats were sacrificed and the cerebral cortex, hippocampus, and cerebellum were isolated. Total antioxidant status (TAS) and total oxidant status (TOS) were measured as oxidative stress parameters in all three brain regions. SIRT2, bcl-2, and bax protein expression levels were measured by western blot and gene expression level of beclin 1, Atg5, and SIRT2 by real-time PCR. Results The bcl-2, bcl-2/bax ratio, beclin 1, and TAS in the cerebral cortex of the aged group were significantly decreased; however, the TOS, oxidative stress index (OSI), and SIRT2 expression in the cerebral cortex and hippocampus increased. SIRT2 inhibition by AGK-2 reduced TOS and OSI levels in all brain regions and increased bcl-2, bcl-2/bax ratio. In aged animals, AGK-2 also increased the beclin 1 levels in the cortex and hippocampus. Conclusion Our results indicate that SIRT2 has an essential role in brain aging. The inhibition of SIRT2 by AGK-2 may increase cell survival and decrease aging related processes in the cerebral cortex and hippocampus via decreasing oxidative stress, and increasing bcl-2 and beclin 1 expression.
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Affiliation(s)
- K.G. Akbulut
- Department of Physiology, School of Medicine, Gazi University, Ankara, Turkey
| | - A. Keskin-Aktan
- Department of Physiology, School of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - S.A. Abgarmi
- Department of Basic Oncology, Cancer Research Institute, Ankara University, Ankara, Turkey
- Department of Medical Oncology, School of Medicine, Ankara University Ankara, Turkey
| | - H. Akbulut
- Department of Basic Oncology, Cancer Research Institute, Ankara University, Ankara, Turkey
- Department of Medical Oncology, School of Medicine, Ankara University Ankara, Turkey
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Jazieh A, Akbulut H, Curigliano G, Rogado A, Alsharm A, Razis E, Mula-Hussain L, Errihani H, Khattak A, De Guzman R, Mathias C, Alkaiyat M, Jradi H, Rolfo C. 1678P_PR The impact of COVID-19 pandemic on cancer care: A global collaborative study. Ann Oncol 2020. [PMCID: PMC7506305 DOI: 10.1016/j.annonc.2020.08.2325] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Acar V, Erden S, Sarikanat M, Seki Y, Akbulut H, Seydibeyoglu MO. Graphene oxide modified carbon fiber prepregs: A mechanical comparison of the effects of oxidation methods. EXPRESS POLYM LETT 2020. [DOI: 10.3144/expresspolymlett.2020.90] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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4
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Akbulut H, Ersoy YE, Coskunpinar E, Gucin Z, Yildiz S, Malya FU, Hasturk B, Muslumanoglu M. The role of miRNAs as a predictor of multicentricity in breast cancer. Mol Biol Rep 2019; 46:1787-1796. [DOI: 10.1007/s11033-019-04629-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/19/2019] [Indexed: 02/07/2023]
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5
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Tek I, Akbulut H, Utkan G, Demirkazik A, Cay Senler F, Icli F. P2.03-34 The Relationship Between Treatment Response and Serum EGFR Level in Nonsmall Cell Lung Cancer. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Yilmaz Sengel T, Guler E, Arslan M, Gumus ZP, Sanli S, Aldemir E, Akbulut H, Odaci Demirkol D, Coskunol H, Timur S, Yagci Y. “Biomimetic-electrochemical-sensory-platform” for biomolecule free cocaine testing. Materials Science and Engineering: C 2018; 90:211-218. [DOI: 10.1016/j.msec.2018.04.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 03/31/2018] [Accepted: 04/16/2018] [Indexed: 01/02/2023]
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7
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Dogan M, Demirkazik A, Konuk N, Yalcin B, Buyukcelik A, Utkan G, Tek I, Akbulut H, Sencan O, Icli F. The Effect of Venous Thromboembolism on Survival of Cancer Patients and its Relationship with Serum Levels of Factor VIII and Vascular Endothelial Growth Factor: A Prospective Matched-Paired Study. Int J Biol Markers 2018. [DOI: 10.1177/172460080602100402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background Venous thromboembolism (VT) increases mortality and morbidity in cancer patients. The primary aim of this study was to evaluate the effect of VT on the survival of cancer patients and its relationship with serum vascular endothelial growth factor (VEGF) and plasma factor VIII levels. Patients and methods Eighty-two patients with locally advanced or metastatic cancer were included in this study between September 2001 and March 2004, and 31 of them had VT. Fifty-one matched-paired cancer patients without VT were prospectively selected as a control group in the same period. Criteria for the selection of control group patients were having the same malignancy, stage, metastatic site, performance status and age (±5 years) as patients in the VT group. Results Plasma factor VIII and serum D-dimer levels in the VT group were significantly higher than those in the control group (p=0.030 and p=0.016, respectively). However, mean serum VEGF levels were similar in both groups (p=0.199). In the VT group, the median survival of patients who had higher serum VEGF levels (>150 pg/mL) was significantly shorter than that of patients in the same group with lower serum VEGF levels (p=0.005). The median survival of the VT group was 14 months, whereas it was 25 months in the control group (p=0.199). Conclusion There was a worse prognostic trend for cancer patients with VT. Nevertheless, the difference in survival was not statistically significant between the groups. Plasma factor VIII and serum D-dimer levels might have prognostic value in cancer patients with VT. Cancer patients with VT and higher serum VEGF levels had a significantly poorer prognosis.
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Affiliation(s)
- M. Dogan
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - A. Demirkazik
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - N. Konuk
- Department of Hematology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - B. Yalcin
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - A. Buyukcelik
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - G. Utkan
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - I. Tek
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - H. Akbulut
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - O. Sencan
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
| | - F. Icli
- Department of Medical Oncology, Ankara University School of Medicine, Cebeci Hospital, Dikimevi, Ankara - Turkey
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Abstract
The usage of radiofrequency ablation (RFA) therapy and elastography to treat thyroid nodules has been increasing recently. Elastography specifically measures the stiffness of tissue using ultra-sonography (US). The aim of the present study was to evaluate the relationship between the elastography values of thyroid nodules and the efficacy of RFA therapy. Ultrasonography was performed on 49 patients who had a thyroid nodule with a diameter of 1 cm or greater before RFA therapy. The RFA was performed under local anesthesia, and elastography was used to measure the stiffness of the normal thyroid tissue, sternocleidomastoid muscle (SCM) and thyroid nodules three months after RFA. The nodule diameter significantly decreased three months after RFA (P < 0.05). According to a cross-evaluation of the mean elastography rates, the thyroid/SCM and nodule/thyroid elastography rates had an inverse relationship (P: 0.009). However, the thyroid/ SCM elastography rates and nodule/SCM elastography rates (P: 0.022) and the thyroid/SCM elastography rates and the rates of reduction (%) of the nodule diameter before and three months after RFA (P: 0.016) had positive relationships. In conclusion, RFA therapy is more effective in patients with thyroid nodules if there are high thyroid tissue/SCM rates in elastography.
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Affiliation(s)
- Ufuk O. Idiz
- Department of General Surgery, Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey
| | - Erhan Aysan
- Departments of General Surgery, Bezmialem Vakif University, Istanbul, Turkey
| | - Leyla Elmas
- Departments of General Surgery, Bezmialem Vakif University, Istanbul, Turkey
| | - Seyma Yildiz
- Radiology, Bezmialem Vakif University, Istanbul, Turkey
| | - Huseyin Akbulut
- Departments of General Surgery, Bezmialem Vakif University, Istanbul, Turkey
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Idiz UO, Aysan E, Elmas L, Yildiz S, Akbulut H. The Place of Elastography in Evaluating the Efficacy of Radiofrequency Ablation of Thyroid Nodules. Am Surg 2017; 83:1228-1234. [PMID: 29183524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The usage of radiofrequency ablation (RFA) therapy and elastography to treat thyroid nodules has been increasing recently. Elastography specifically measures the stiffness of tissue using ultrasonography (US). The aim of the present study was to evaluate the relationship between the elastography values of thyroid nodules and the efficacy of RFA therapy. Ultrasonography was performed on 49 patients who had a thyroid nodule with a diameter of 1 cm or greater before RFA therapy. The RFA was performed under local anesthesia, and elastography was used to measure the stiffness of the normal thyroid tissue, sternocleidomastoid muscle (SCM) and thyroid nodules three months after RFA. The nodule diameter significantly decreased three months after RFA (P < 0.05). According to a cross-evaluation of the mean elastography rates, the thyroid/SCM and nodule/thyroid elastography rates had an inverse relationship (P: 0.009). However, the thyroid/SCM elastography rates and nodule/SCM elastography rates (P: 0.022) and the thyroid/SCM elastography rates and the rates of reduction (%) of the nodule diameter before and three months after RFA (P: 0.016) had positive relationships. In conclusion, RFA therapy is more effective in patients with thyroid nodules if there are high thyroid tissue/SCM rates in elastography.
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Yardimci E, Aysan E, Idiz UO, Akbulut H, Yigman S. WHAT SHOULD BE THE APPROACH TO MODERATE HYPOCALCAEMIA IN THE EARLY PERIOD FOLLOWING TOTAL THYROIDECTOMY? Acta Endocrinol (Buchar) 2017; 13:437-440. [PMID: 31149213 DOI: 10.4183/aeb.2017.437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Context It is unclear whether treatment is necessary for transient moderate hypocalcaemia occurring after total thyroidectomy; if it is present, it is unclear which treatment modality should be preferred. Objective To investigate both the necessity and effectiveness of different treatment approaches of oral and/or intravenous calcium treatment in patients with transient, postoperative, moderate hypocalcaemia. Design This is a case control study made between June 2014 and June 2015. Subjects and Methods Forty-five patients who had serum calcium levels 6 hours after total thyroidectomy between 7.5-8 mg/dL were divided into three equal groups: an oral calcium administration group, an intravenous calcium administration group and a no-treatment group. Serum calcium and parathyroid hormone levels were measured preoperatively and on postoperative days 1, 2, 5 and 10. Results For post-thyroidectomy patients with serum calcium 7.5-8 mg/dL in the early postoperative period, no significant difference in serum calcium or parathyroid hormone was detected between groups. Conclusions Follow-up without treatment seems to be the most effective approach for moderate hypocalcaemia occurring in the early period following total thyroidectomy; this suggests that intravenous treatment should be avoided.
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Affiliation(s)
- E Yardimci
- "Bezmialem Vakif" University, Dept. of General Surgery, Turkey
| | - E Aysan
- "Bezmialem Vakif" University, Dept. of General Surgery, Turkey
| | - U O Idiz
- Sisli Hamidiye Etfal Egitim ve Arastirma Hastanesi, Dept. of General Surgery Istanbul, Turkey
| | - H Akbulut
- "Bezmialem Vakif" University, Dept. of General Surgery, Turkey
| | - S Yigman
- "Bezmialem Vakif" University, Dept. of General Surgery, Turkey
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Affiliation(s)
- Huseyin Akbulut
- Molecular Engineering Institute; Kindai University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
| | - Shuhei Yamada
- Molecular Engineering Institute; Kindai University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
| | - Takeshi Endo
- Molecular Engineering Institute; Kindai University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
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Aysan E, Kiran T, Idiz UO, Guler B, Akbulut H, Kunduz E, Arici S, Kadakal G, Ozgor M, Coci K. The diagnostic ability of core needle biopsy in nodular thyroid disease. Ann R Coll Surg Engl 2017; 99:233-236. [PMID: 27791426 PMCID: PMC5450281 DOI: 10.1308/rcsann.2016.0331] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2016] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Non-diagnostic results of fine needle aspiration biopsy (FNAB) remain an important limitation of this technqiue. The aim of our study was to evaluate the results of core needle biopsy (CNB) of thyroid nodules and its effectiveness in non-diagnostic FNAB cases. METHODS CNBs were performed in 1,000 patients (154 male, 846 female; mean age: 50.2 years, range: 18-86 years) with a spring loaded 20G needle. Of these, 143 had initially had FNABs that were insufficient for evaluation. The CNB reports were reviewed. Patients with suspicious or malignant CNB results underwent total thyroidectomy. RESULTS When considering all 1,000 CNBs, the non-diagnostic rate was 1.5% (15/1,000). However, when the first 100 cases were eliminated as a learning curve, this reduced to 0.9% (8/900). Of the 143 cases with initial FNABs that were non-diagnostic, 0.7% (1/143) were also non-diagnostic on CNB. Twelve patients underwent surgery because of malignant CNB reports and all of these cases were confirmed as malignant by the postoperative pathology specimen results (100% accuracy). There were no major complications although three self-limiting minor complications were observed. CONCLUSIONS CNB is a safe and accurate method. It is more diagnostic than FNAB for nodular thyroid disease.
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MESH Headings
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Biopsy, Large-Core Needle
- Carcinoma/diagnosis
- Carcinoma/pathology
- Carcinoma/surgery
- Carcinoma, Neuroendocrine/diagnosis
- Carcinoma, Neuroendocrine/pathology
- Carcinoma, Neuroendocrine/surgery
- Carcinoma, Papillary
- Female
- Humans
- Image-Guided Biopsy
- Male
- Middle Aged
- Thyroid Cancer, Papillary
- Thyroid Carcinoma, Anaplastic/diagnosis
- Thyroid Carcinoma, Anaplastic/pathology
- Thyroid Carcinoma, Anaplastic/surgery
- Thyroid Neoplasms/diagnosis
- Thyroid Neoplasms/pathology
- Thyroid Neoplasms/surgery
- Thyroid Nodule/diagnosis
- Thyroid Nodule/pathology
- Thyroid Nodule/surgery
- Thyroidectomy
- Ultrasonography
- Young Adult
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Affiliation(s)
- E Aysan
- Bezmialem Vakif University , Istanbul , Turkey
| | - T Kiran
- Bezmialem Vakif University , Istanbul , Turkey
| | - U O Idiz
- Sisli Etfal Training and Research Hospital , Istanbul , Turkey
| | - B Guler
- Bezmialem Vakif University , Istanbul , Turkey
| | - H Akbulut
- Bezmialem Vakif University , Istanbul , Turkey
| | - E Kunduz
- Bezmialem Vakif University , Istanbul , Turkey
| | - S Arici
- Bezmialem Vakif University , Istanbul , Turkey
| | - G Kadakal
- Bezmialem Vakif University , Istanbul , Turkey
| | - M Ozgor
- Bezmialem Vakif University , Istanbul , Turkey
| | - K Coci
- Bezmialem Vakif University , Istanbul , Turkey
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Arslan M, Yilmaz Sengel T, Guler E, Gumus ZP, Aldemir E, Akbulut H, Coskunol H, Timur S, Yagci Y. Double fluorescence assay via a β-cyclodextrin containing conjugated polymer as a biomimetic material for cocaine sensing. Polym Chem 2017. [DOI: 10.1039/c7py00420f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A double fluorescence based μ-well assay was designed by using a novel biomimetic material (PPP-CD-g-PEG) for cocaine detection.
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Affiliation(s)
- Mustafa Arslan
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- Istanbul
- Turkey
| | | | - Emine Guler
- Department of Biochemistry
- Faculty of Science
- Ege University
- Izmir
- Turkey
| | - Z. Pinar Gumus
- Institute of Drug Abuse Toxicology & Pharmaceutical Sciences
- Ege University
- Izmir
- Turkey
| | - Ebru Aldemir
- Institute of Drug Abuse Toxicology & Pharmaceutical Sciences
- Ege University
- Izmir
- Turkey
| | - Huseyin Akbulut
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- Istanbul
- Turkey
| | - Hakan Coskunol
- Ege Life Sciences
- Izmir
- Turkey
- Faculty of Medicine
- Addiction Treatment Center
| | - Suna Timur
- Department of Biochemistry
- Faculty of Science
- Ege University
- Izmir
- Turkey
| | - Yusuf Yagci
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- Istanbul
- Turkey
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Karcı E, Köksoy E, Alkan A, Dede İ, Tuncay G, Utkan G, Ürün Y, Akbulut H. Predictive factors of lymph node metastasis in patients with non-metastatic colorectal adenocarcinoma. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw370.84] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Alkan A, Mızrak D, Karcı E, Yaşar A, Köksoy E, Ürün M, Kütük T, Ürün Y, Şenler FÇ, Akyürek S, Utkan G, Demirkazık A, Gökçe Ş, Akbulut H. Adjuvant concurrent chemoradiotherapy(CRT) plus docetaxel- cisplatin- fluorouracil (DCF) versus CRT plus fluorouracil folinic acid (FUFA) in gastric cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw371.56] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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Geyik C, Guler E, Gumus ZP, Barlas FB, Akbulut H, Demirkol DO, Timur S, Yagci Y. Bioconjugation and Applications of Amino Functional Fluorescence Polymers. Macromol Biosci 2016; 17. [PMID: 27689764 DOI: 10.1002/mabi.201600232] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/04/2016] [Indexed: 12/11/2022]
Abstract
Synthesis and novel applications of biofunctional polymers for diagnosis and therapy are promising area involving various research domains. Herein, three fluorescent polymers, poly(p-phenylene-co-thiophene), poly(p-phenylene), and polythiophene with amino groups (PPT-NH2 , PPP-NH2 , and PT-NH2 , respectively) are synthesized and investigated for cancer cell targeted imaging, drug delivery, and radiotherapy. Polymers are conjugated to anti-HER2 antibody for targeted imaging studies in nontoxic concentrations. Three cell lines (A549, Vero, and HeLa) with different expression levels of HER2 are used. In a model of HER2 expressing cell line (A549), radiotherapy experiments are carried out and results show that all three polymers increase the efficacy of radiotherapy. This effect is even more increased when conjugated to anti-HER2. In the second part of this work, one of the selected polymers (PT-NH2 ) is conjugated with a drug model; methotrexate via pH responsive hydrazone linkage and a drug carrier property of PT-NH2 is demonstrated on neuroblastoma (SH-SY5Y) cell model. Our results indicate that, PPT-NH2 , PPP-NH2 , and PT-NH2 have a great potential as biomaterials for various bioapplications in cancer research.
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Affiliation(s)
- Caner Geyik
- Ege University Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100, Bornova, Izmir, Turkey
| | - Emine Guler
- Ege University Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100, Bornova, Izmir, Turkey.,Ege University, Faculty of Science Department of Biochemistry, 35100, Bornova, Izmir, Turkey
| | - Zinar Pinar Gumus
- Ege University Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100, Bornova, Izmir, Turkey
| | - Firat Baris Barlas
- Ege University, Faculty of Science Department of Biochemistry, 35100, Bornova, Izmir, Turkey
| | - Huseyin Akbulut
- Istanbul Technical University, Department of Chemistry, Faculty of Science and Letters, 34469, Istanbul, Turkey
| | - Dilek Odaci Demirkol
- Ege University, Faculty of Science Department of Biochemistry, 35100, Bornova, Izmir, Turkey
| | - Suna Timur
- Ege University Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100, Bornova, Izmir, Turkey.,Ege University, Faculty of Science Department of Biochemistry, 35100, Bornova, Izmir, Turkey
| | - Yusuf Yagci
- Istanbul Technical University, Department of Chemistry, Faculty of Science and Letters, 34469, Istanbul, Turkey.,Center of Excellence for Advanced Materials Research (CEAMR) and Chemistry Department Faculty of Science, King Abdulaziz University, PO Box 80203, Jeddah, 21589, Saudi Arabia
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Akbulut H, Ocal M, Sonugur G, Akay B, Babahan C, Abgarmi SA, Demirkazik A, Icli F. The role of immune system on the efficacy of bevacizumab in patients with metastatic colorectal cancer (mCRC). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw392.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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18
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Alkan A, Karcı E, Yaşar A, Tuncay G, Ürün M, Köksoy E, Ürün Y, Şenler FÇ, Utkan G, Demirkazık A, Akbulut H. Medical oncologists' attitudes towards vaccination in oncology practice. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw390.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bektasoglu H, Bozkurt S, Akbulut H, Yardimci E, Kadioglu H. Efficacy of Fibrin Sealant Application on Postoperative Hemorrhage in Bariatric Surgery. Surg Obes Relat Dis 2016. [DOI: 10.1016/j.soard.2016.08.386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Guler E, Akbulut H, Geyik C, Yilmaz T, Gumus ZP, Barlas FB, Ahan RE, Demirkol DO, Yamada S, Endo T, Timur S, Yagci Y. Complex Structured Fluorescent Polythiophene Graft Copolymer as a Versatile Tool for Imaging, Targeted Delivery of Paclitaxel, and Radiotherapy. Biomacromolecules 2016; 17:2399-408. [DOI: 10.1021/acs.biomac.6b00491] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Emine Guler
- Ege University, Faculty of Science, Department
of Biochemistry, 35100-Bornova, Izmir, Turkey
- Ege University, Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100-Bornova, Izmir, Turkey
| | - Huseyin Akbulut
- Department
of Chemistry, Faculty of Science and Letters, Istanbul Technical University, 34467-Istanbul, Turkey
| | - Caner Geyik
- Ege University, Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100-Bornova, Izmir, Turkey
| | - Tulay Yilmaz
- Ege University, Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100-Bornova, Izmir, Turkey
| | - Z. Pinar Gumus
- Ege University, Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100-Bornova, Izmir, Turkey
| | - F. Baris Barlas
- Ege University, Faculty of Science, Department
of Biochemistry, 35100-Bornova, Izmir, Turkey
| | - Recep Erdem Ahan
- Department
of Chemistry, Faculty of Science and Letters, Istanbul Technical University, 34467-Istanbul, Turkey
| | - Dilek Odaci Demirkol
- Ege University, Faculty of Science, Department
of Biochemistry, 35100-Bornova, Izmir, Turkey
| | - Shuhei Yamada
- Molecular
Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka 820-8555, Japan
| | - Takeshi Endo
- Molecular
Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka 820-8555, Japan
| | - Suna Timur
- Ege University, Faculty of Science, Department
of Biochemistry, 35100-Bornova, Izmir, Turkey
- Ege University, Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences, 35100-Bornova, Izmir, Turkey
| | - Yusuf Yagci
- Department
of Chemistry, Faculty of Science and Letters, Istanbul Technical University, 34467-Istanbul, Turkey
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Guler B, Akbulut H, Geyik C, Barlas FB, Demirkol DO, Coskunol H, Timur S, Yagci Y. Functional poly(p-phenylene)s as targeting and drug carrier materials. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2016.1157797] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Aysan E, Idiz UO, Akbulut H, Elmas L. Single-session radiofrequency ablation on benign thyroid nodules: a prospective single center study : Radiofrequency ablation on thyroid. Langenbecks Arch Surg 2016; 401:357-63. [PMID: 27013327 DOI: 10.1007/s00423-016-1408-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 03/14/2016] [Indexed: 10/22/2022]
Abstract
PURPOSE The activity of the application of single-session ultrasonography (US)-guided percutaneous radio frequency ablation (RFA) in benign thyroid nodules was investigated in this prospective clinical study. METHODS RFA treatment was applied to 100 nodules in 100 patients (78 women, 22 men; average age 44.5 years old; age range 18-71) who had euthyroid condition, nodule size larger than 1 cm in the ultrasonography, proven to be benign by fine needle aspiration cytology. The nodules were separated into three groups according to the content: solid, cystic and mixed. In first 73 cases, the process performed under local anesthesia and the other 27 cases were performed under general anesthesia. RFA process was standardized to 70 W in all of the patients, and a moving shot technique was used. The results acquired in the third and sixth months of the controls were evaluated, and the volume of the nodules was screened. RESULTS No differences between the thyroid function tests performed before and after RFA were detected (p > 0.05). The mean volume of the nodules before the process, in the third month after the process, and in the sixth month were 16.8, 4.8, and 2.6 ml, respectively (p < 0.001). The decrease in cystic nodules was greater than solid and mixed structures. Temporary hoarseness occurred in one case and skin edema was detected in a patient at the isthmus. CONCLUSIONS RFA is an option for treatment, with minimal invasiveness and a low complication rate, and it is effective primarily in cases with benign nodules and nodular goiter. In cases with good compliance, the likelihood of success is greater. General anesthesia can be a good option for anxious cases to gather better results.
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Affiliation(s)
- Erhan Aysan
- Department of General Surgery, Bezmialem Vakif University, Faculty of Medicine, Fatih, Istanbul, Turkey
| | - Ufuk Oguz Idiz
- Department of General Surgery, Bezmialem Vakif University, Faculty of Medicine, Fatih, Istanbul, Turkey. .,Sisli Etfal Training and Research Hospital, Department of General Surgery, Istanbul, Turkey.
| | - Huseyin Akbulut
- Department of General Surgery, Bezmialem Vakif University, Faculty of Medicine, Fatih, Istanbul, Turkey
| | - Leyla Elmas
- Department of General Surgery, Bezmialem Vakif University, Faculty of Medicine, Fatih, Istanbul, Turkey
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Bozokalfa G, Akbulut H, Demir B, Guler E, Gumus ZP, Odaci Demirkol D, Aldemir E, Yamada S, Endo T, Coskunol H, Timur S, Yagci Y. Polypeptide Functional Surface for the Aptamer Immobilization: Electrochemical Cocaine Biosensing. Anal Chem 2016; 88:4161-7. [PMID: 26928030 DOI: 10.1021/acs.analchem.6b00760] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Electroanalytical technologies as a beneficial subject of modern analytical chemistry can play an important role for abused drug analysis which is crucial for both legal and social respects. This article reports a novel aptamer-based biosensing procedure for cocaine analysis by combining the advantages of aptamers as selective recognition elements with the well-known advantages of biosensor systems such as the possibility of miniaturization and automation, easy fabrication and modification, low cost, and sensitivity. In order to construct the aptasensor platform, first, polythiophene bearing polyalanine homopeptide side chains (PT-Pala) was electrochemically coated onto the surface of an electrode and then cocaine aptamer was attached to the polymer via covalent conjugation chemistry. The stepwise modification of the surface was confirmed by electrochemical characterization. The designed biosensing system was applied for the detection of cocaine and its metabolite, benzoylecgonine (BE), which exhibited a linear correlation in the range from 2.5 up to 10 nM and 0.5 up to 50 μM for cocaine and BE, respectively. In order to expand its practical application, the proposed method was successfully tested for the analysis of synthetic biological fluids.
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Affiliation(s)
| | - Huseyin Akbulut
- Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University , 34469 Istanbul, Turkey
| | | | | | | | | | | | - Shuhei Yamada
- Molecular Engineering Institute, Kinki University , 11-6 Kayanomori, Iizuka, Fukuoka 820-8555, Japan
| | - Takeshi Endo
- Molecular Engineering Institute, Kinki University , 11-6 Kayanomori, Iizuka, Fukuoka 820-8555, Japan
| | | | | | - Yusuf Yagci
- Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University , 34469 Istanbul, Turkey
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24
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Guler B, Akbulut H, Barlas FB, Geyik C, Demirkol DO, Senisik AM, Arican HA, Coskunol H, Timur S, Yagci Y. Poly(p
-phenylene) with Poly(ethylene glycol) Chains and Amino Groups as a Functional Platform for Controlled Drug Release and Radiotherapy. Macromol Biosci 2016; 16:730-7. [DOI: 10.1002/mabi.201500384] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 11/25/2015] [Indexed: 12/19/2022]
Affiliation(s)
- Bahar Guler
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova Izmir Turkey
| | - Huseyin Akbulut
- Department of Chemistry; Faculty of Science and Letters; Istanbul Technical University; 34467 Istanbul Turkey
| | - Firat Baris Barlas
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova Izmir Turkey
| | - Caner Geyik
- Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences; Ege University; 35100 Bornova Izmir Turkey
| | - Dilek Odaci Demirkol
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova Izmir Turkey
| | | | - Halil Armagan Arican
- Vocational School of Health Services; Radiotheraphy Department; Sifa University; Buca 35370 Izmir Turkey
| | - Hakan Coskunol
- Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences; Ege University; 35100 Bornova Izmir Turkey
| | - Suna Timur
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova Izmir Turkey
- Institute on Drug Abuse, Toxicology & Pharmaceutical Sciences; Ege University; 35100 Bornova Izmir Turkey
| | - Yusuf Yagci
- Department of Chemistry; Faculty of Science and Letters; Istanbul Technical University; 34467 Istanbul Turkey
- Center of Excellence for Advanced Materials Research (CEAMR) and Chemistry DepartmentFaculty of Science; King Abdulaziz University; PO Box 80203 Jeddah 21589 Saudi Arabia
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Yilmaz T, Guler E, Gumus ZP, Akbulut H, Aldemir E, Coskunol H, Goen Colak D, Cianga I, Yamada S, Timur S, Endo T, Yagci Y. Synthesis and application of a novel poly-l-phenylalanine electroactive macromonomer as matrix for the biosensing of ‘Abused Drug’ model. Polym Chem 2016. [DOI: 10.1039/c6py01764a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The synthesis and biosensing application of a novel poly-l-phenylalanine-bearing electroactive macromonomer has been carried out.
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Abstract
l-Cysteine-grafted polystyrene was synthesized from a cysteine-styrene monomer (Cys-Sty) in aqueous solution and used as a facile and selective high-recovery material for palladium(ii), platinum(iv), and gold(iii) ions from aqueous media.
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Affiliation(s)
| | - Shuhei Yamada
- Molecular Engineering Institute
- Kindai University
- Iizuka
- Japan
| | - Takeshi Endo
- Molecular Engineering Institute
- Kindai University
- Iizuka
- Japan
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Akbulut H, Bozokalfa G, Asker DN, Demir B, Guler E, Odaci Demirkol D, Timur S, Yagci Y. Polythiophene-g-poly(ethylene glycol) with Lateral Amino Groups as a Novel Matrix for Biosensor Construction. ACS Appl Mater Interfaces 2015; 7:20612-20622. [PMID: 26323569 DOI: 10.1021/acsami.5b04967] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In the ever-expanding field of conducting polymer research, functionalized graft hybrid copolymers have gained considerable interest in the biomedical engineering and biosensing applications, particularly. In the present work, a new biosensor based on conducting graft copolymer for the detection of phenolic compounds was developed. Thereby, a robust and novel material, namely "polythiophene-g-poly(ethylene glycol) with lateral amino groups" (PT-NH2-g-PEG) hybrid conducting polymer was synthesized via Suzuki condensation polymerization and characterized with (1)H NMR analysis, UV-vis spectroscopy, gel permeation chromatography (GPC) and fluorescence spectroscopy. PT-NH2-g-PEG architecture was then applied as an immobilization matrix to accomplish extended biosensing function. In a typical process, Laccase was utilized as a model enzyme for the detection of phenolic compounds. Detailed surface characterization of PT-NH2-g-PEG/Lac was performed by cyclic voltammetry, electrochemical impedance spectroscopy, atomic force microscopy, fluorescence microscopy and scanning electron microscopy measurements. Optimum pH and polymer amount were found to be pH 6.5 and 0.5 mg polymer, respectively, with the linear range of 0.0025-0.05 mM and 132.45 μA/mM sensitivity. The kinetic parameters of PT-NH2-g-PEG/Lac are 0.026 mM for Km(app) and 7.38 μA for Imax, respectively. Furthermore, the PT-NH2-g-PEG/Lac biofilm was retained 82% of its activity for 12 days indicating excellent recovery as tested with artificial wastewater.
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Affiliation(s)
- Huseyin Akbulut
- Istanbul Technical University , Department of Chemistry, Faculty of Science and Letters, Istanbul, Turkey
| | - Guliz Bozokalfa
- Ege University Faculty of Science Biochemistry Department 35100 Bornova-Izmir, Turkey
| | - Duygu N Asker
- Ege University Faculty of Science Biochemistry Department 35100 Bornova-Izmir, Turkey
| | - Bilal Demir
- Ege University Faculty of Science Biochemistry Department 35100 Bornova-Izmir, Turkey
| | - Emine Guler
- Ege University Faculty of Science Biochemistry Department 35100 Bornova-Izmir, Turkey
- Ege University , Institute of Drug Abuse Toxicology & Pharmaceutical Sciences, 35100 Bornova, Izmir, Turkey
| | - Dilek Odaci Demirkol
- Ege University Faculty of Science Biochemistry Department 35100 Bornova-Izmir, Turkey
| | - Suna Timur
- Ege University Faculty of Science Biochemistry Department 35100 Bornova-Izmir, Turkey
- Ege University , Institute of Drug Abuse Toxicology & Pharmaceutical Sciences, 35100 Bornova, Izmir, Turkey
| | - Yusuf Yagci
- Istanbul Technical University , Department of Chemistry, Faculty of Science and Letters, Istanbul, Turkey
- Center of Excellence for Advanced Materials Research (CEAMR) and Chemistry Department Faculty of Science, King Abdulaziz University , P.O. Box 80203, Jeddah 21589, Saudi Arabia
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Urun Y, Abal H, Turna H, Esin E, Sedef A, Alkan A, Oksüzoğlu B, Ozdemir N, Sendur M, Sezer A, Kiliçkap S, Akbulut H, Celik I. 3354 Prognostic factors for survival in patients with metastatic melanoma treated with ipilimumab: Turkish Oncology Group (TOG) Study. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31872-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Guler E, Akbulut H, Bozokalfa G, Demir B, Eyrilmez GO, Yavuz M, Demirkol DO, Coskunol H, Endo T, Yamada S, Timur S, Yagci Y. Bioapplications of Polythiophene-g-Polyphenylalanine-Covered Surfaces. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500219] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Emine Guler
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Izmir Turkey
- Institute on Drug Abuse Toxicology and Pharmaceutical Science; Ege University; 35100 Izmir Turkey
| | - Huseyin Akbulut
- Department of Chemistry; Faculty of Science and Letters; Istanbul Technical University; Maslak 34469 Istanbul Turkey
| | - Guliz Bozokalfa
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Izmir Turkey
| | - Bilal Demir
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Izmir Turkey
| | - Gizem Oyman Eyrilmez
- Department of Biotechnology; Graduate School of Natural and Applied Sciences; Ege University; 35100 Izmir Turkey
| | - Murat Yavuz
- Department of Chemistry; Faculty of Science; Dicle University; 21280 Diyarbakir Turkey
| | - Dilek Odaci Demirkol
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Izmir Turkey
| | - Hakan Coskunol
- Institute on Drug Abuse Toxicology and Pharmaceutical Science; Ege University; 35100 Izmir Turkey
- Psychiatry Department; Faculty of Medicine; Ege University; 35100 Izmir Turkey
| | - Takeshi Endo
- Molecular Engineering Institute; Kinki University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
| | - Shuhei Yamada
- Molecular Engineering Institute; Kinki University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
| | - Suna Timur
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Izmir Turkey
- Institute on Drug Abuse Toxicology and Pharmaceutical Science; Ege University; 35100 Izmir Turkey
| | - Yusuf Yagci
- Department of Chemistry; Faculty of Science and Letters; Istanbul Technical University; Maslak 34469 Istanbul Turkey
- Center of Excellence for Advanced Materials Research (CEAMR) and Chemistry Department; Faculty of Science; King Abdulaziz University; PO Box 80203 Jeddah 21589 Saudi Arabia
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Akbulut H, Endo T, Yamada S, Yagci Y. Synthesis and characterization of polyphenylenes with polypeptide and poly(ethylene glycol) side chains. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27621] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Huseyin Akbulut
- Department of Chemistry; Istanbul Technical University; Istanbul 34469 Turkey
| | - Takeshi Endo
- Molecular Engineering Institute; Kinki University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
| | - Shuhei Yamada
- Molecular Engineering Institute; Kinki University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
| | - Yusuf Yagci
- Department of Chemistry; Istanbul Technical University; Istanbul 34469 Turkey
- Center of Excellence for Advanced Materials Research (CEAMR) and Chemistry Department; Faculty of Science; King Abdulaziz University; P.O. Box 80203 Jeddah 21589 Saudi Arabia
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31
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Mizrak D, Ozturk B, Kubilay P, Akbulut H, Onur H. P170 Serum levels of CEA and CA 15-3 in different subtypes of recurrent breast cancer. Breast 2015. [DOI: 10.1016/s0960-9776(15)70211-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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32
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Mizrak D, Ozturk B, Kubilay P, Akbulut H, Onur H. P279 More prognostic factors in early stage breast cancer. Breast 2015. [DOI: 10.1016/s0960-9776(15)70311-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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33
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Mizrak D, Onur H, Ozturk B, Kubilay P, Akbulut H. P276 Effect of tumor hormonal and HER2 status on localization of metastases in recurrent breast cancer. Breast 2015. [DOI: 10.1016/s0960-9776(15)70308-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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34
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Mizrak D, Kubilay P, Ozturk B, Onur H, Akbulut H. P167 Preoperative systemic therapy for locally advanced breast cancer: single center experience. Breast 2015. [DOI: 10.1016/s0960-9776(15)70208-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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35
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Ürun Y, Utkan G, Yalcin B, Akbulut H, Onur H, Oztuna DG, Şenler FC, Demirkazık A, İçli F. The role of cardiac biomarkers as predictors of trastuzumab cardiotoxicity in patients with breast cancer. Exp Oncol 2015; 37:53-57. [PMID: 25804233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
AIM Identification of patient with increased risk of cardiotoxicity would allow not only prevention and early diagnosis of chemotherapy related cardiotoxicity but also administration of optimal dose and duration of chemotherapy. MATERIALS AND METHODS Fifty-two women with HER2(+) breast cancer treated with trastuzumab were included in this study. Patients were prospectively followed with routine cardiac evaluation. Before and after administration of trastuzumab blood samples for NT-proBNP were also taken. RESULTS The median age was 48.5 year (range: 26-74). Hypertension and obesity were two most common co-morbidities. The median duration application of trastuzumab was 52 weeks. During median 14.5 (3-33) months follow-up cardiac adverse events occurred in 5 (9.6%) patients and 2 out of 5 was grade III-IV heart failure. Both patients had preserved left ventricular ejection fraction and no symptom of heart failure before trastuzumab but older than 65 years old and had diabetes mellitus and obesity. High level of NT-proBNP (> 300 ng/ml) was observed in both patients and heart failure recovery was not observed. There was statistically significant difference regarding body mass index (p = 0.004) and diabetes mellitus (p = 0.002) between patients with and without cardiotoxicity. CONCLUSION Although, cardiac biomarkers still cannot replace routine cardiac monitoring, natriuretic peptides may provide additional tool for detection of patients with high risk of cardiotoxicity and early detection of cardiotoxicity.
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Affiliation(s)
- Y Ürun
- Department of Medical Oncology,Gaziantep Dr. Ersin Arslan State Hospital, Gaziantep 27310, Turkey
| | - G Utkan
- Department of Medical Oncology, Ankara University School of Medicine, Ankara 06590, Turkey
| | - B Yalcin
- Department of Medical Oncology,Yildirim Beyazit University School of Medicine, Atatürk Education and Research Hospital, Ankara 06800, Turkey
| | - H Akbulut
- Department of Medical Oncology, Ankara University School of Medicine, Ankara 06590, Turkey
| | - H Onur
- Department of Medical Oncology, Ankara University School of Medicine, Ankara 06590, Turkey
| | - D G Oztuna
- Department of Biostatistics,Ankara University School of Medicine, Ankara 06100, Turkey
| | - F C Şenler
- Department of Medical Oncology, Ankara University School of Medicine, Ankara 06590, Turkey
| | - A Demirkazık
- Department of Medical Oncology, Ankara University School of Medicine, Ankara 06590, Turkey
| | - F İçli
- Department of Medical Oncology, Ankara University School of Medicine, Ankara 06590, Turkey
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Akbulut H, Guler B, Timur S, Yagci Y. Synthesis, characterization and targeted cell imaging applications of poly(p-phenylene)s with amino and poly(ethylene glycol) substituents. RSC Adv 2015. [DOI: 10.1039/c5ra08893c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel approach for bioconjugation associated with a fluorescent conjugated polymer is demonstrated.
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Affiliation(s)
- Huseyin Akbulut
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- Istanbul
- Turkey
| | - Bahar Guler
- Department of Biochemistry
- Faculty of Science
- Ege University
- Izmir
- Turkey
| | - Suna Timur
- Department of Biochemistry
- Faculty of Science
- Ege University
- Izmir
- Turkey
| | - Yusuf Yagci
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- Istanbul
- Turkey
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Aysan E, Ersoy Y, Gucin Z, Cengiz M, Akbulut H, Arici S, Muslumanoglu M. New thyroid fine needle aspiration biopsy needle. Prospective, randomized, clinical study. Clin Endocrinol (Oxf) 2014. [PMID: 25040053 DOI: 10.1111/cen.12554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Nodular disease of thyroid in the adult population is common [1]. Estimated prevalence of thyroid nodules on the basis of palpation ranges from 3% to 7% [2]. During the past two decades, according to widespread use of ultrasonography (US) for evaluation of thyroid and nonthyroid neck diseases prevalence of clinically inapparent thyroid nodules is increased, estimated at 20% to 76% in the general population [3,4]. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Erhan Aysan
- Surgeon General, Bezmialem Vakif University Department of General Surgery
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Idiz O, Aysan E, Firat D, Ersoy YE, Cengiz MB, Akbulut H, Isık A, Muslumanoglu M. Efficacy of glycerol and flax seed oil as anti-adhesive barriers after thyroidectomy. Med Sci Monit 2014; 20:1090-4. [PMID: 24973306 PMCID: PMC4085115 DOI: 10.12659/msm.890460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Background We evaluated the effects of local flax seed oil and glycerol application for reducing adhesion formation after thyroidectomy. Material/Method We randomly assigned 18 female Wistar albino rats (median weight: 275 g, median age: 4.5 mth) to 3 groups: 0.1 ml 0.9% NaCl, glycerol, and flax seed oil were sprayed in a perithyroidal area after thyroidectomy operation on all animals as anti-adhesive barriers. Rats were sacrificed on the postoperative 14th day and adhesions were evaluated macroscopically and microscopically. Results The median macroscopic adhesion score was 3.0±0.0 in the 0.9% NaCl group, 1.33±0.52 in the glycerol group, and 1.67±0.53 in the flax seed oil group. The median histopathological fibrosis scores were 2.33±0.82, 0.67±0.52, and 0.83±0.75, respectively. Both glycerol and flaxseed oil group macroscopic and microscopic scores were significantly lower than the 0.9% NaCl group (p<0.05). There was no significant difference among the groups (p>0.05). Conclusions Glycerol and flax seed oil both decrease the incidence of post-thyroidectomy adhesion in rats, but glycerol is more effective.
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Affiliation(s)
- Oguz Idiz
- Department of General Surgery, Bezmialem University, İstanbul, Turkey
| | - Erhan Aysan
- Department of General Surgery, Bezmialem University, İstanbul, Turkey
| | - Deniz Firat
- Department of General Surgery, Erzincan University, Erzincan, Turkey
| | - Yeliz Emine Ersoy
- Department of General Surgery, Bezmialem University, İstanbul, Turkey
| | | | - Huseyin Akbulut
- Department of General Surgery, Bezmialem University, İstanbul, Turkey
| | - Arda Isık
- Department of General Surgery, Erzincan University, Erzincan, Turkey
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Akbulut H, Yavuz M, Guler E, Demirkol DO, Endo T, Yamada S, Timur S, Yagci Y. Electrochemical deposition of polypeptides: bio-based covering materials for surface design. Polym Chem 2014. [DOI: 10.1039/c4py00079j] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and efficient approach for the electrochemical deposition of polypeptides as bio-based covering materials for surface design is described.
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Affiliation(s)
- Huseyin Akbulut
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- Istanbul, Turkey
| | - Murat Yavuz
- Department of Biochemistry
- Faculty of Science
- Ege University
- Izmir, Turkey
- Department of Chemistry
| | - Emine Guler
- Department of Biochemistry
- Faculty of Science
- Ege University
- Izmir, Turkey
| | | | - Takeshi Endo
- Molecular Engineering Institute
- Kinki University
- Iizuka, Japan
| | - Shuhei Yamada
- Molecular Engineering Institute
- Kinki University
- Iizuka, Japan
| | - Suna Timur
- Department of Biochemistry
- Faculty of Science
- Ege University
- Izmir, Turkey
| | - Yusuf Yagci
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- Istanbul, Turkey
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40
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Kesik M, Akbulut H, Söylemez S, Cevher ŞC, Hızalan G, Arslan Udum Y, Endo T, Yamada S, Çırpan A, Yağcı Y, Toppare L. Synthesis and characterization of conducting polymers containing polypeptide and ferrocene side chains as ethanol biosensors. Polym Chem 2014. [DOI: 10.1039/c4py00850b] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel approach for the fabrication of a biosensor from a conducting polymer bearing polypeptide segments and ferrocene moieties is reported.
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Affiliation(s)
- Melis Kesik
- Department of Chemistry
- Middle East Technical University
- 06800 Ankara, Turkey
| | - Huseyin Akbulut
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- 34469 Istanbul, Turkey
| | - Saniye Söylemez
- Department of Chemistry
- Middle East Technical University
- 06800 Ankara, Turkey
| | - Şevki Can Cevher
- Department of Chemistry
- Middle East Technical University
- 06800 Ankara, Turkey
| | - Gönül Hızalan
- Department of Chemistry
- Middle East Technical University
- 06800 Ankara, Turkey
| | - Yasemin Arslan Udum
- Institute of Science and Technology
- Department of Advanced Technologies
- Gazi University
- 06570 Ankara, Turkey
| | - Takeshi Endo
- Molecular Engineering Institute
- Kinki University
- Iizuka, Japan
| | - Shuhei Yamada
- Molecular Engineering Institute
- Kinki University
- Iizuka, Japan
| | - Ali Çırpan
- Department of Chemistry
- Middle East Technical University
- 06800 Ankara, Turkey
- Department of Polymer Science and Technology
- Middle East Technical University
| | - Yusuf Yağcı
- Department of Chemistry
- Faculty of Science and Letters
- Istanbul Technical University
- 34469 Istanbul, Turkey
| | - Levent Toppare
- Department of Chemistry
- Middle East Technical University
- 06800 Ankara, Turkey
- Department of Polymer Science and Technology
- Middle East Technical University
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41
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Akbulut KG, Guney S, Cetin F, Akgun HN, Aktas SH, Akbulut H. Melatonin Delays Brain Aging by Decreasing the Nitric Oxide Level. NEUROPHYSIOLOGY+ 2013. [DOI: 10.1007/s11062-013-9368-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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42
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Urun Y, Akbulut H, Demirkazik A, Cay Senler F, Utkan G, Onur H, Icli F. Perception about influenza and pneumococcal vaccines and vaccination coverage among patients with malignancies and their family members. J BUON 2013; 18:511-515. [PMID: 23818370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
PURPOSE Although influenza and pneumococcal vaccinations for high-risk populations are recommended by current guidelines, vaccination coverage rate (VCR) is still low in patients with malignancies and the family members living with them. METHODS During the 2011-2012 seasonal influenza (SI), we surveyed 359 patients with solid or hematological malignancies Data were recorded in an especially designed questionnaire after face to face interview. RESULTS The median patient age was 57 years (range 18-90) and 177 (49.3%) patients were female. Overall vaccination rate was 17% and 4.2% for influenza and pneumococcus, respectively. VCR among family members was 21.2%. The most common causes for not getting vaccinated were lack of knowledge for indication by the patients (33.5%), getting chemotherapy (22.1%), fear of side effects (12.5%), lack of efficacy (12.1%), and not advised by the attending physician (5.9%). CONCLUSION VCR was very low among patients with cancer and their family members. To eliminate misconceptions and improve vaccination coverage in this population, educational programs for patients and for physicians focusing on safety and efficacy of vaccine are needed.
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Affiliation(s)
- Y Urun
- Ankara University School of Medicine, Department of Medical Oncology, Ankara, Turkey
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43
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Kılıç F, Gül H, Aslan S, Alp A, Akbulut H. Effect of CTAB concentration in the electrolyte on the tribological properties of nanoparticle SiC reinforced Ni metal matrix composite (MMC) coatings produced by electrodeposition. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2012.11.048] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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44
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Gül H, Akbulut H, Aslan S, Alp A. Effect of reciprocating sliding speed on the tribological performance of nano SiC(p) reinforced Ni-metal matrix composites produced by electrocodeposition. J Nanosci Nanotechnol 2012; 12:9076-9087. [PMID: 23447960 DOI: 10.1166/jnn.2012.6748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In the present work, Ni/SiC metal matrix composite (MMC) coatings were prepared from a modified Watt's type electrolyte containing nano-SiC particles by direct current (DC) plating method to increase wear resistance of the electro co-deposited Ni. SiC nano particles with average particle size of 0, 1-1 microm were co-deposited with nickel matrix on the steel substrates. For this purpose, several studies were carried out to optimize deposition parameters for specific applications. The depositions were controlled to obtain the specific thickness (between 175-200 microm) and particle volume fraction in the matrix (between 0.03 and 0.10). The hardness of the resultant coatings was measured and found to be 280-571 HV depending on the particle concentration in the electrolyte and therefore, particle volume in the Ni matrix. The tribological tests were performed by a reciprocating ball-on disk apparatus sliding against M50 steel ball (Ø10 mm). All the friction and wear tests were performed under the unlubricated conditions at room temperature and in the ambient air (relative humidity 55-65%). The wear tests were carried out at different sliding velocities of 50 mm/s, 100 mm/s and 150 mm/s by using a constant dead load of 1.0 N. It was detected that increasing sliding speed resulted to increase wear rate but decreasing friction coefficient due to change in wear mechanism. Increasing sliding speed showed formation of tribo induced oxides up to 20 g/l SiC(p) in the electrolyte and wear mechanism was controlled by temperature induced fatigue wear. Further increase in the SiC(p) in the electrolyte caused an abrasive type of the wear.
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Affiliation(s)
- H Gül
- Gumusova Vocational School Department of Metallurgy, Düzce University, Gumusova 81850, Duzce
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45
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Tocoglu U, Alaf M, Cevher O, Guler MO, Akbulut H. The effect of oxidants on the formation of multi-walled carbon nanotube buckypaper. J Nanosci Nanotechnol 2012; 12:9169-9174. [PMID: 23447973 DOI: 10.1166/jnn.2012.6751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In the present study, we report the systematic investigation of the effect of chemical oxidation on the structure of multi-walled carbon nanotubes (MWCNTs) and multi-walled carbon nanotubes buckypaper. The chemical oxidation of multi-walled carbon nanotubes was performed via using three types of chemical solutions: nitric acid, sulfuric acid/nitric acid (3/1) and ammonium hydroxide/hydrogen peroxide (1/1). The surfaces of the multi-walled carbon nanotubes were modified by forming Carboxyl and other functional groups. Flexible multi-walled carbon nanotubes buckypapers were then produced by vacuum filtration techniques from functionalized multi-walled carbon nanotubes. The characteristic properties of multi-walled carbon nanotubes specimens were investigated via Raman, and Fourier Transform Infrared Spectroscopies. The thermal properties and morphology of multi-walled carbon nanotubes were also studied byThermogravimetric Analysis and Field Emission Scanning Electron Microscopy techniques.
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Affiliation(s)
- U Tocoglu
- Engineering Faculty, Department of Metallurgical and Materials Engineering, Sakarya University, Esentepe Campus 54187, Turkey
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46
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Alaf M, Gultekin D, Akbulut H. Production of Sn/SnO2/MWCNT composites by plasma oxidation after thermal evaporation from pure Sn targets onto buckypapers. J Nanosci Nanotechnol 2012; 12:9058-9066. [PMID: 23447958 DOI: 10.1166/jnn.2012.6753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this study, tin/tinoxide/multi oxide/multi walled carbon nano tube (Sn/SnO2/MWCNT) composites were produced by thermal evaporation and then subsequent plasma oxidation. Buckypapers having controlled porosity were prepared by vacuum filtration from functionalized MWCNTs. Pure metallic tin was thermally evaporated on the buckypapers in argon atmosphere with different thicknesses. It was determined that the evaporated pure tin nano crystals were mechanically penetrated into pores of buckypaper to form a nanocomposite. The tin/MWCNT composites were subjected to plasma oxidation process at oxygen/argon gas mixture. Three different plasma oxidation times (30, 45 and 60 minutes) were used to investigate oxidation and physical and microstructural properties. The effect of coating thickness and oxidation time was investigated to understand the effect of process parameters on the Sn and SnO2 phases after plasma oxidation. Quantitative phase analysis was performed in order to determine the relative phase amounts. The structural properties were studied by field-emission gun scanning electron microscopy (FEG-SEM), atomic force microscopy (AFM) and X-ray diffraction (XRD).
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Affiliation(s)
- M Alaf
- Engineering Faculty, Department of Metallurgy and Materials Engineering, Sakarya University, Esentepe Campus, 54187 Sakarya, Turkey
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47
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lcli F, Caliskan D, Gonullu I, Akbulut H, Ozkan A, Olmez S, Gonullu U, Sunguroglu K. Fighting Against Cigarette Smoking Among Medical Students- A Success Story. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)34002-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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48
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Urun Y, Utkan G, Altundag K, Arslan O, Onur H, Arslan UY, Kocer M, Dogan I, Senler FC, Yalcin B, Demirkazik A, Akbulut H, Icli F. ABO and Rh blood groups frequency in women with HER2 positive breast cancer. J BUON 2012; 17:457-460. [PMID: 23033281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
PURPOSE The role of genetic factors in the development of cancer is widely accepted. Data on the role of ABO blood group and Rh factor in breast cancer is inconclusive. The aim of this study was to investigate the presence of a possible association between HER2 (+) breast cancer in Turkish women and ABO blood groups and Rh factor. METHODS In 294 female patients with HER2 (+) breast cancer, ABO blood groups and Rh factor were examined. The relationship of blood groups with age, menopausal status, and family history of cancer, estrogen receptor (ER), progesterone receptor (PR) and HER2 status of these patients was evaluated. Blood groups distribution of 22,821 healthy blood donors was also assessed and compared with the patients' blood groups distribution. RESULTS The median patient age was 47 years (range 20-80) and 56% of the patients were premenopausal. ER and PR were positive in 50 and 60% of the patients, respectively. Overall, the ABO blood group distribution of the 294 HER2 (+) breast cancer patients was similar to that of the healthy blood donors (p=0.36). Likewise there was no correlation between blood type and ER, PR and menopausal status. Rh (-) patients had more frequent family cancer history and this difference was significant for patients with blood group B Rh (-) and O Rh (-) (p = 0.04). CONCLUSION In the present study we didn't find any relationship between HER2 status and ABO blood group and Rh factor. However, further studies with larger number of patients are needed to establish the role (if any) of blood groups in patients with breast cancer.
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Affiliation(s)
- Y Urun
- Ankara University Faculty of Medicine, Department of Medical Oncology, Ankara, Turkey
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Ürün Y, Can F, Bariş E, Akbulut H, Utkan G, İçli F. Primary extranodal non-Hodgkin's lymphoma presenting as painful gingival swelling. Exp Oncol 2012; 34:134-135. [PMID: 23013768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Primary extra-nodal non-Hodgkin's lymphomas (NHL) constitute 25-40% of NHL but less than 1% arises in oral cavity. Here in 53-year-old man with stage IE gingival diffuse large B cell lymphoma who was treated successfully with chemotherapy and radiotherapy was presented.
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Affiliation(s)
- Y Ürün
- Department of Medical Oncology, Cebeci Hospital, Ankara University School of Medicine, Ankara, Turkey.
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50
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Yucel B, Sanli B, Soylemez H, Akbulut H. Palladium-catalyzed reaction of 2-iodoferrocenyl alcohols with internal alkynes: Synthesis of functionally 1,2-disubstituted ferrocenes and ferroceno-pyrans. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.01.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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