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Cassini D, Clementi S, Colletti G, Cortellazzi P, Baldazzi G. ERAS prehabilitation in “low budget” era…“where there’s a will, there’s a way”. Clin Nutr ESPEN 2019. [DOI: 10.1016/j.clnesp.2019.03.124] [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: 11/30/2022]
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Miele F, Clementi S, Gennaro R, Nicolao I, Romanelli T, Speese K, Piras EM. Text Messaging and Type 1 Diabetes Management: Qualitative Study Exploring Interactions Among Patients and Health Care Professionals. JMIR Diabetes 2019; 4:e11343. [PMID: 31094332 PMCID: PMC6533872 DOI: 10.2196/11343] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 10/16/2018] [Accepted: 03/30/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The diffusion of information and communication technologies (ICTs) in type 1 diabetes (T1D) management has generated a debate on the ways in which ICTs can support the patient-provider relationship. Several studies have focused on text messages. Most of the literature proposes quantitative analysis of the impact of text messaging on the clinical conditions of patients and/or their satisfaction with the technology, while the qualitative studies have focused mainly on patients' perceptions about strengths and weaknesses of this technology. OBJECTIVE In contrast to past studies, we adopted a qualitative approach for the in-depth examination of patient-health care professionals' interactions in text messaging. METHODS The study focused on the use of the Trento Cartella Clinica del Cittadino Diabetes System (TreC-DS), a digital platform with a built-in messaging system, in two diabetes centers, integrating message analysis with interviews with patients and health care professionals. Each center focused on a specific patient profile: the first one focused on pregnant women with T1D and the second one focused on adult patients with poorly controlled diabetes. RESULTS The main results of the study were as follows: (1) Health care professionals and patients perceived the messaging system as useful for sharing information (ie, pregnant women for prescriptions and adults with poorly controlled diabetes for advice); (2) The content and communication styles of the two centers differed: in the case of pregnant women, interactions via text messaging were markedly prescriptive, while in the case of adult patients with poorly controlled diabetes, they were conceived as open dialogues; and (3) Conversations were initiated mainly by professionals; in the cases considered, it was mainly the diabetes center that decided whether a messaging conversation was needed. CONCLUSIONS The results show how the features of interactions of text messaging changed based on the patient profiles in two different centers. In addition, in both diabetes centers that were involved, the system seems to have laid a foundation for a closer relationship between patients and health care professionals.
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Affiliation(s)
- Francesco Miele
- e-Health Research Unit, Bruno Kessler Foundation, Trento, Italy
| | - Silvia Clementi
- Azienda Provinciale per i Servizi Sanitari, Diabetes Center, Trento, Italy
| | - Renzo Gennaro
- Azienda Provinciale per i Servizi Sanitari, Diabetes Center, Rovereto, Italy
| | - Ilaria Nicolao
- Azienda Provinciale per i Servizi Sanitari, Diabetes Center, Trento, Italy
| | - Tiziana Romanelli
- Azienda Provinciale per i Servizi Sanitari, Diabetes Center, Trento, Italy
| | - Katja Speese
- Azienda Provinciale per i Servizi Sanitari, Diabetes Center, Rovereto, Italy
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Clementi S, Fraglica A, Della Rovere I, Gonella M. When nursing becomes transdisciplinary: promoting health in cancer experience, a collaboration between nurses and professional educators at an oncology center. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx438.016] [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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Bordonaro S, Berretta M, Tralongo AC, Clementi S, Stanzione B, Tralongo P. The Real Impact of Target Therapy in Breast Cancer Patients: Between Hope and Reality. Curr Cancer Drug Targets 2017; 18:480-498. [PMID: 28183251 DOI: 10.2174/1568009617666170209100322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 01/11/2016] [Revised: 06/03/2016] [Accepted: 06/28/2016] [Indexed: 11/22/2022]
Abstract
Over the last 15 years, we have seen a huge expansion of the development of drugs directed against biomolecular targets within breast cancer cells. The over-expression of certain receptors (ER, PgR, HER-2, VEGF-R), as well as alteration of several intracellular signal transduction pathways (the PI3K-AKT-mTOR pathway, MEK-MAPK pathway, loss of PTEN, etc ...) has a great impact on the likelihood of recurrence and progression of the disease, influencing the natural history of breast cancer. The recent biomolecular classification of breast cancer (Luminal A / B, HER2- driven, Basal Like) allowed finally to identify specific treatments against molecular target to associate or not to traditional chemotherapy, and to use in relation to the prognosis of the disease. In the following paragraphs, we will set out the major targeted drug that have received indications in breast cancer, both in the localized and in advanced disease, referring to the specific target (hormonal receptors, HER2, VEGF, m-TOR, PARP etc ...).
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Affiliation(s)
| | | | | | - Silvia Clementi
- Division of Medical Oncology, "Umberto I" Hospital - RAO - Siracusa, Italy
| | - Brigida Stanzione
- Department of Medical Oncology, National Cancer Institute Aviano (PN), Italy
| | - Paolo Tralongo
- Division of Medical Oncology, "Umberto I" Hospital - RAO - Siracusa, Italy
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Clementi S, Ernandez E, Barile G, Rivera S, Gonella M. The role of psychosocial status in the change of lifestyles in patients with colorectal cancer in follow up. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw339.06] [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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6
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Ernandez E, Clementi S, Rivera S, Barile G, Gonella M. Italian adaptation of the “Fantastic Lifestyle Checklist” for the evaluation of the change of lifestyles in patients with carcinoma of the colon and rectum in follow-up. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw335.34] [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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Sanò MV, Taibi E, Ali M, Di Marco R, Zacchia A, Chiarenza M, Fallica G, Clementi S, Aiello RA, Caruso M. Adjuvant trastuzumab in the treatment of small HER2-positive tumors: A single institution experience. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e11514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Maria Vita Sanò
- Medical oncology Department, Humanitas Centro Catanese di Oncologia, Catania, Italy
| | | | - Marco Ali
- Humanitas Centro Catanese di Oncologia, Catania, Italy
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Abstract
In renal diagnosis, the B-mode ultrasound is used to provide an accurate study of the renal morphology, whereas the colour and power Doppler are of strategic importance in providing qualitative and quantitative information about the renal vasculature, which can also be obtained through the assessment of the resistive index (RI). To date, this is one of the most sensitive parameters in the study of kidney diseases and allows us to quantify the changes in renal plasma flow. If a proper Doppler ultrasound examination is carried out and a critical analysis of the values obtained is performed, the RI measurement at the interlobar artery level has been suggested in the differential diagnosis between nephropathies. The aim of this review is to highlight the pathological conditions in which the study of intrarenal RI provides useful information about the pathophysiology of renal diseases in both the native and the transplanted kidneys.
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Affiliation(s)
- A Granata
- 1 Nephrology and Dialysis Unit, "St Giovanni di Dio" Hospital, Agrigento, Italy
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Granata A, Clementi S, Londrino F, Romano G, Veroux M, Fiorini F, Fatuzzo P. Renal transplant vascular complications: the role of Doppler ultrasound. J Ultrasound 2014; 18:101-7. [PMID: 26191097 DOI: 10.1007/s40477-014-0085-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [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: 01/28/2014] [Accepted: 03/14/2014] [Indexed: 12/15/2022] Open
Abstract
Improvements in the care of kidney transplant recipients and advances in immunosuppressive therapy have reduced the incidence of graft rejection. As a result, other types of kidney transplant complications, such as surgical, urologic, parenchymal, and vascular complications, have become more common. Although vascular complications account for only 5-10 % of all post-transplant complications, they are a frequent cause of graft loss. Ultrasonography, both in B-mode and with Doppler ultrasound, is a fundamental tool in the differential diagnosis of renal allograft dysfunction. Doppler ultrasound is highly specific in cases of transplanted renal artery stenosis, pseudoaneurysms, arteriovenous fistulas, and thrombosis with complete or partial artery or vein occlusion. A single measurements of color Doppler indexes display high diagnostic accuracy and in particular cases are more useful during the post-transplantation follow-up period. More recent techniques, such as contrast-enhanced ultrasound, undoubtedly increase the accuracy of ultrasonography in the diagnosis of vascular complications involving the transplanted kidney.
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Affiliation(s)
- Antonio Granata
- Nephrology and Dialysis Unit, "St. Giovanni di Dio" Hospital, Agrigento, Italy ; Via F. Paradiso n°78/a, 95024 Acireale (CT), Italy
| | - Silvia Clementi
- Medical Oncology Unit, Humanitas, Centro Catanese di Oncologia, Catania, Italy
| | | | - Giulia Romano
- Internal Medicine Unit, AOU "Vittorio Emanuele, Policlinico", Catania, Italy
| | - Massimiliano Veroux
- Vascular Surgery and Organ Transplant Unit, University Hospital of Catania, Catania, Italy
| | - Fulvio Fiorini
- Nephrology and Dialysis Unit, "Santa Maria della Consolazione" Hospital, Rovigo, Italy
| | - Pasquale Fatuzzo
- Cattedra di Nefrologia, Scuola di Specializzazione in Nefrologia, University Hospital of Catania, Catania, Italy
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Granata A, Clementi S, Clementi A, Di Pietro F, Scarfia VR, Insalaco M, Aucella F, Prencipe M, Fiorini F, Sicurezza E. [Parenchymal complications of the transplanted kidney: the role of color-Doppler imaging]. G Ital Nefrol 2012; 29 Suppl 57:S90-S98. [PMID: 23229534] [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
Kidney transplantation is the treatment of choice for end-stage renal disease, given the better quality of life of transplanted patients when compared to patients on maintenance dialysis. In spite of surgical improvements and new immunosuppressive regimens, part of the transplanted grafts still develop chronic dysfunction. Ultrasonography, both in B-mode and with Doppler ultrasound, is an important diagnostic tool in case of clinical conditions which might impair kidney function. Even though ultrasonography is considered fundamental in the diagnosis of vascular and surgical complications of the transplanted kidney, its role is not fully understood in case of parenchymal complications of the graft. The specificity of Doppler ultrasound is low both in case of acute complications such as acute tubular necrosis, drug toxicity and acute rejection, and in case of chronic conditions such as chronic allograft nephropathy. Single determinations of resistance indices present low diagnostic accuracy, which is higher in case of successive measurements performed during the follow-up of the graft. Modern techniques including tissue pulsatility index, maximal fractional area and contrast-enhanced ultrasound increase the diagnostic power of ultrasonography in case of parenchymal complications of the transplanted kidney.
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Affiliation(s)
- Antonio Granata
- U.O.C. Nefrologia e Dialisi, Ospedale San Giovanni di Dio, Agrigento, Italy.
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Sano M, Taibi E, Alì M, Chiarenza M, Clementi S, Caruso M, Aiello R. Efficacy and Safety of Trastuzumab in Small HER2 Positive Tumors. A Single Institution Experience. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32837-4] [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: 11/30/2022] Open
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Quiniou JB, Paul C, Puig L, Luger T, Lambert J, Clementi S, Girolomoni G, Nicolas JF, Kragballe K, Rizova E, Mistry S, Barker J, Reich K. L’ustekinumab est bien toléré et efficace chez les patients atteints de psoriasis dont la réponse au méthotrexate est insuffisante : résultats de la semaine 12 de l’étude TRANSIT. Ann Dermatol Venereol 2011. [DOI: 10.1016/j.annder.2011.10.263] [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: 12/01/2022]
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Bertino G, Neri S, Bruno CM, Ardiri AM, Calvagno GS, Malaguarnera M, Toro A, Malaguarnera M, Clementi S, Bertino N, Di Carlo I. Diagnostic and prognostic value of alpha-fetoprotein, des-γ-carboxy prothrombin and squamous cell carcinoma antigen immunoglobulin M complexes in hepatocellular carcinoma. Minerva Med 2011; 102:363-371. [PMID: 22193346] [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: 05/31/2023]
Abstract
The hepatocellular carcinoma (HCC) is one of the most common malignant tumors. It carries a poor survival rate and has an increasing incidence worldwide. In most cases, HCC is diagnosed at a late stage. Therefore, the prognosis of patients with HCC is generally poor and has a less than 5% 5-year survival rate. The aim of this study was compare the accuracy of α-fetoprotein (AFP), des-γ- carboxy prothrombin (DCP), squamous cell carcinoma antigen-immunoglobulin M complexes (SCCA-IgM Cs) in the early diagnosis and in the prognosis of HCC. A literature search identified the markers for hepatocellular carcinoma. A search of the literature was made using cancer literature and the PubMed database for the following keywords: "markers and HCC", "α-fetoprotein (AFP) and HCC", "Des-γ-carboxy prothrombin"(DCP) and HCC, "squamous cell carcinoma antigen-immunoglobulin M complexes" (SCCA-IgM Cs). Despite the large number of studies devoted to the immunohistochemistry of HCC, at the present time, the absolute positive and negative markers for HCC are still lacking, and even those characterized by very high sensitivity and specificity do not have an universal diagnostic usefulness. In conclusion none of the three biomarkers (AFP, DCP, SCCA-IgM Cs) is optimal. According to recent reviews, these biomarkers should be measured simultaneously and in combination with imaging techniques to increase the sensitivity, specificity, diagnostic accuracy and to make a reliable prognosis. Currently the recommended screening strategy for patients with cirrhosis includes the determination of serum AFP levels and an abdominal ultrasound every six months to detect HCC at an earlier stage.
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Affiliation(s)
- G Bertino
- Department of Internal Medicine and Systemic Diseases, Catania University, Catania, Italy
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14
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Scandurra G, Aiello RA, Taibi E, Sanò MV, Ali M, Fallica G, Chiarenza M, Mazzola A, Di Marco R, Clementi S, Di Leo MGV, Miano E, Caruso M. Different outcomes of cardiologic safety of trastuzumab in adjuvant or metastatic setting in patients with breast cancer: A single institution experience. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e11028] [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: 11/20/2022] Open
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15
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Luca T, Di Benedetto G, Scuderi MR, Palumbo M, Clementi S, Bernardini R, Cantarella G. The CB1/CB2 receptor agonist WIN-55,212-2 reduces viability of human Kaposi's sarcoma cells in vitro. Eur J Pharmacol 2009; 616:16-21. [DOI: 10.1016/j.ejphar.2009.06.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2008] [Revised: 05/19/2009] [Accepted: 06/03/2009] [Indexed: 10/20/2022]
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16
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Libra M, Scalisi A, Vella N, Clementi S, Sorio R, Stivala F, Spandidos DA, Mazzarino C. Uterine cervical carcinoma: role of matrix metalloproteinases (review). Int J Oncol 2009; 34:897-903. [PMID: 19287946 DOI: 10.3892/ijo_00000215] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Epidemiological and experimental studies have provided evidence that human papillomavirus (HPV) infection is a main player in the development of uterine cervical neoplasms. Migration of cancer cells from the origin tissue to surrounding or distant organs is essential for tumor progression. Many studies of tumor invasion and metastases have focused on the degradation of the extracellular matrix where matrix metalloproteinases (MMPs) play a central role. Two of these enzymes, MMP-2 and MMP-9, have been correlated with the processes of tumor cell invasion and metastasis in human cancers, including uterine neoplasms. It has been shown that the up-regulation of MMPs is associated with progression of cervical uterine neoplasms. This review describes the current understanding of MMP-2 and MMP-9 expression and activity in pre-cancer and cancer lesions of cervical uterine, which may open new strategies for diagnostic and therapeutic interventions.
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Affiliation(s)
- Massimo Libra
- Department of Biomedical Sciences, University of Catania, I-95124 Catania, Italy.
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Martinez G, Costantino G, Clementi A, Puglia M, Clementi S, Cantarella G, De Meo L, Matera M. Cisplatin-induced kidney injury in the rat: l-carnitine modulates the relationship between MMP-9 and TIMP-3. ACTA ACUST UNITED AC 2009; 61:183-8. [DOI: 10.1016/j.etp.2008.07.004] [Citation(s) in RCA: 12] [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: 02/21/2008] [Revised: 07/11/2008] [Accepted: 07/11/2008] [Indexed: 11/25/2022]
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Ligresti G, Libra M, Militello L, Clementi S, Donia M, Imbesi R, Malaponte G, Cappellani A, McCubrey J, Stivala F. Breast cancer: Molecular basis and therapeutic strategies (Review). Mol Med Rep 2008. [DOI: 10.3892/mmr.1.4.451] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Fornasarig M, Minisini A, Clementi S, Bidoli E, Viel A, Cannizzaro R, Campagnutta E, Boz G, Libra M. Risk analysis of colorectal cancer in women with endometrial carcinoma. Mol Med Rep 2008. [DOI: 10.3892/mmr.1.4.549] [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: 11/05/2022] Open
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20
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Ligresti G, Libra M, Militello L, Clementi S, Donia M, Imbesi R, Malaponte G, Cappellani A, McCubrey JA, Stivala F. Breast cancer: Molecular basis and therapeutic strategies (Review). Mol Med Rep 2008; 1:451-458. [PMID: 21479431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
Breast cancer is the most common malignancy among women. It is frequently treated with chemotherapy and hormone therapy. More recently, however, 'targeted therapy' has emerged as an important approach to cancer therapy. Targeted therapy works by interfering with a specific molecular target, though inter-individual variability in drug response often causes treatment failure. Anticancer agents inhibit breast cancer progression by several different mechanisms. The Ras/Raf/MEK/ERK signal transduction pathway regulates cell cycle progression and apoptosis in diverse cell types. Alterations in this pathway are often associated with human cancer, including breast cancer. Understanding breast cancer biology is useful for the identification of appropriate anticancer drugs. This review describes the effect of gene alterations on breast cancer development. In addition, it shows how each anticancer drug used to treat breast cancer may block aberrant cell proliferation. Finally, the mechanisms of resistance to therapy are also discussed.
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Affiliation(s)
- Giovanni Ligresti
- Department of Biomedical Sciences, University of Catania, I-95124 Catania, Italy
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21
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Fornasarig M, Minisini AM, Clementi S, Bidoli E, Viel A, Cannizzaro R, Campagnutta E, Boz G, Libra M. Risk analysis of colorectal cancer in women with endometrial carcinoma. Mol Med Rep 2008; 1:549-553. [PMID: 21479448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
Endometrial carcinoma (EC) and colorectal cancer (CRC) are closely linked in a well-documented, predominantly inherited cancer syndrome known as hereditary non-polyposis colorectal cancer (HNPCC). Epidemiological studies report that women with EC have a 1.5- to 3-fold increased risk of developing CRC. However, this elevated risk could be the consequence of genetic confounding. In order to plan a proper CRC prevention program, we sought to verify and quantify this risk, first estimating it in 697 women with EC who received treatment and follow-up in one health care district between 1986 and 2000. The standardised incidence ratio (SIR), which compares observed with expected cases of CRC in the general population, was calculated. Multiple logistic regression analysis was used to estimate the odds ratio and 95% confidence interval of a dependent variable, second primary CRC, as a function of clinical and pathological features. Multiple primary tumours were observed in 6.7% of the patients, with CRC being the second most frequently occurring type of cancer. The estimated overall risk for CRC was slightly higher than that observed in the general population, but was nonetheless not statistically significant. Multivariate analysis revealed a family history of CRC to be a risk factor for developing the disease as a second primary cancer. A BMI ≤25 and the pathological spectrum of EC were clinical and pathological features associated with CRC development, but were without statistical significance. MSH2 and MLH1 mutational screening confirmed genetic involvement in most of the CRCs observed in the cohort. Overall, the data show that women with EC have a CRC risk similar to that of the general population, and should therefore be screened on the basis of risk factors for CRC.
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Affiliation(s)
- Mara Fornasarig
- Gastroenterology Unit, Centro di Riferimento Oncologico, IRCCS, I-33081 Aviano (PN), Italy.
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22
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Cantarella G, Bucolo C, Di Benedetto G, Pezzino S, Lempereur L, Calvagna R, Clementi S, Pavone P, Fiore L, Bernardini R. Protective effects of the sigma agonist Pre-084 in the rat retina. Br J Ophthalmol 2007; 91:1382-4. [PMID: 17522150 PMCID: PMC2001020 DOI: 10.1136/bjo.2007.118570] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM With the rationale that amyloid beta (AB) is toxic to the retina, we here assessed the role of TRAIL, a mediator of AB toxicity and related signal transduction, in a rat model. We also attempted to demonstrate possible protective effects of sigma 1 receptor agonists in these processes. METHODS AB and the sigma 1 receptor agonist Pre-084 were injected intravitreally in the anaesthetised rat. In additional experiments, the sigma 1 receptor antagonist BD1047 was administered to assess specificity of the effects of Pre-084. Western blot analysis was performed on retinas to evaluate the expression of TRAIL and TRAIL receptors in the retina, as well as of Bax and phosphorylated JNK following the different treatments. Lactic dehydrogenase (LDH) levels were measured as a cytotoxicity marker. RESULTS All TRAIL receptors were expressed in rat retinas. Intravitreal injection of AB in rat eyes induced overexpression of TRAIL and the proapoptotic protein Bax, as well as phosphorylation of JNK. All these effects of AB were abrogated by pretreatment with the sigma(1) receptor agonist Pre-084. CONCLUSIONS It is likely that TRAIL is a mediator of AB effects on the retina. In light of their specific inhibitory effects upon TRAIL expression, it is plausible to hypothesise that sigma(1) receptor agonists could represent potential pharmacological tools for restraining AB related retinal damage.
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Affiliation(s)
- Giuseppina Cantarella
- Department of Experimental and Clinical Pharmacology, University of Catania School of Medicine, Viale Andrea Doria 6, 95125 Catania, Italy
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Pastor M, Cruciani G, McLay I, Pickett S, Clementi S. GRid-INdependent descriptors (GRIND): a novel class of alignment-independent three-dimensional molecular descriptors. J Med Chem 2000; 43:3233-43. [PMID: 10966742 DOI: 10.1021/jm000941m] [Citation(s) in RCA: 376] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Traditional methods for performing 3D-QSAR rely upon an alignment step that is often time-consuming and can introduce user bias, the resultant model being dependent upon and sensitive to the alignment used. There are several methods which overcome this problem, but in general the necessary transformations prevent a simple interpretation of the resultant models in the original descriptor space (i.e. 3D molecular coordinates). Here we present a novel class of molecular descriptors which we have termed GRid-INdependent Descriptors (GRIND). They are derived in such a way as to be highly relevant for describing biological properties of compounds while being alignment-independent, chemically interpretable, and easy to compute. GRIND are obtained starting from a set of molecular interaction fields, computed by the program GRID or by other programs. The procedure for computing the descriptors involves a first step, in which the fields are simplified, and a second step, in which the results are encoded into alignment-independent variables using a particular type of autocorrelation transform. The molecular descriptors so obtained can be used to obtain graphical diagrams called "correlograms" and can be used in different chemometric analyses, such as principal component analysis or partial least-squares. An important feature of GRIND is that, with the use of appropriate software, the original descriptors (molecular interaction fields) can be regenerated from the autocorrelation transform and, thus, the results of the analysis represented graphically, together with the original molecular structures, in 3D plots. In this respect, the article introduces the program ALMOND, a software package developed in our group for the computation, analysis, and interpretation of GRIND. The use of the methodology is illustrated using some examples from the field of 3D-QSAR. Highly predictive and interpretable models are obtained showing the promising potential of the novel descriptors in drug design.
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Affiliation(s)
- M Pastor
- Laboratory on Chemometrics, Department of Chemistry, University of Perugia, Via Elce di Sotto 10, 06123 Perugia, Italy
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Clementi M, Clementi S, Cruciani G, Pastor M, Davis AM, Flower DR. Robust multivariate statistics and the prediction of protein secondary structure content. Protein Eng 1997; 10:747-9. [PMID: 9342139 DOI: 10.1093/protein/10.7.747] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- M Clementi
- Multivariate Infometric Analysis, Perugia, Italy
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Cecchetti V, Filipponi E, Fravolini A, Tabarrini O, Bonelli D, Clementi M, Cruciani G, Clementi S. Chemometric methodologies in a quantitative structure-activity relationship study: the antibacterial activity of 6-aminoquinolones. J Med Chem 1997; 40:1698-706. [PMID: 9171879 DOI: 10.1021/jm960385p] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The paper illustrates the chemometric strategies appropriate for extracting information from a large amount of biological data regarding the antibiotic activity of 6-aminoquinolones. The unique framework based on principal component analysis, projection onto latent structures, and response surface methodologies permits the structure-activity correlations to be shown and to suggest new compounds for further testing. The low activity of the suggested molecules points out the limitations of quantitative structure-activity relationship models when the training set is not properly designed in order to balance all the structural variations taken into account.
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Affiliation(s)
- V Cecchetti
- Istituto di Chimica e Tecnologia del Farmaco, Università di Perugia, Italy
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Pastor M, Cruciani G, Clementi S. Smart region definition: a new way to improve the predictive ability and interpretability of three-dimensional quantitative structure-activity relationships. J Med Chem 1997; 40:1455-64. [PMID: 9154968 DOI: 10.1021/jm9608016] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This report describes a new methodology aimed at grouping 3D-QSAR interaction energy descriptors into regions of neighbor variables bearing the same chemical and statistical information. These regions represent the structural variability of the series better than individual descriptor variables and can advantageously replace them in the chemometric analysis. The algorithm used to generate such regions is described, together with their application for improving the quality of GOLPE variable selection. The method is illustrated on a series of 47 glucose analogues, inhibitors of glycogen phosphorylase b, and is shown to improve both the predictive ability and the interpretability of the 3D-QSAR models obtained, comparing favorably with other methods previously described.
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Affiliation(s)
- M Pastor
- Department of Chemistry, University of Perugia, Italy
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Nilsson J, Wikström H, Smilde A, Glase S, Pugsley T, Cruciani G, Pastor M, Clementi S. GRID/GOLPE 3D quantitative structure-activity relationship study on a set of benzamides and naphthamides, with affinity for the dopamine D3 receptor subtype. J Med Chem 1997; 40:833-40. [PMID: 9083471 DOI: 10.1021/jm9605952] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In the search for drugs against schizophrenia and depression without extrapyramidal side effects, compounds that selectively antagonize the dopamine D3 receptor subtype are thought to be a solution. In order to create a model with which the D3 activity can be predicted and that can generate new ideas for future synthesis, we performed a comparative molecular field analysis (CoMFA). In our model 30 ligands were described quantitatively in the GRID program, and the model was optimized by selecting only the most informative variables in the GOLPE program. We found the predictive ability of the model to increase significantly when the number of variables was reduced from 25110 to 784. A Q2 of 0.65 was obtained with the final model, confirming the predictive ability of the model. By studying the PLS coefficients in informative 3D contour plots, ideas for the synthesis of new compounds can be generated.
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Affiliation(s)
- J Nilsson
- Department of Medicinal Chemistry, University Centre for Pharmacy, Groningen, The Netherlands
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Cecchetti V, Clementi S, Cruciani G, Fravolini A, Pagella PG, Savino A, Tabarrini O. 6-Aminoquinolones: a new class of quinolone antibacterials? J Med Chem 1995; 38:973-82. [PMID: 7699714 DOI: 10.1021/jm00006a017] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A series of quinolone- and 1,8-naphthyridone-3-carboxylic acids, designed by previous QSAR studies and characterized by an amino group at the C-6 position instead of the usual fluorine atom, were synthesized for the first time and evaluated for in vitro antibacterial activity. All of the synthesized compounds maintain good activity against Gram-negative bacteria (Pseudomonas aeruginosa excluded), and those compounds having a thiomorpholine group as the C-7 substituent also have good activity against Gram-positive bacteria. Some aspects of structure-activity relationships associated with the C-1, C-5, C-7, and C-8 substituents are also discussed. Derivatives 18g and 38g displayed the best activity with geometric mean MICs of 0.45 and 0.66-0.76 micrograms/mL against Gram-negative and Gram-positive bacteria, respectively. This antimicrobial activity reflects their ability to inhibit bacterial DNA-gyrase. The results of this study show that, while the C-6 fluorine is still the preferred substituent, good activity can still be obtained by replacing it with an amino group.
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Affiliation(s)
- V Cecchetti
- Istituto di Chimica Farmaceutica e Tecnica Farmaceutica, Università di Perugia, Italy
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Rovero P, Riganelli D, Fruci D, Viganò S, Pegoŕaro S, Revoltella R, Greco G, Butler R, Clementi S, Tanigaki N. The importance of secondary anchor residue motifs of HLA class I proteins: a chemometric approach. Mol Immunol 1994; 31:549-54. [PMID: 8190130 DOI: 10.1016/0161-5890(94)90042-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In this paper we report a chemometric approach to Quantitative Structure-Activity Relationship (QSAR) analysis applied to a study of the binding of peptides to Major Histocompatibility Complex (MHC) class I proteins. Peptides which possess the known primary anchor residue motif for HLA-B27 binding do not necessarily bind to HLA-B27 proteins. Secondary anchor residues are also involved, but it is not yet clear which amino acids are required or in which positions. A classic approach to this problem would be to synthesize multiple peptides each varying by a single amino acid from a starting peptide, and test them for their binding properties. Not only is this approach inefficient, but it is essentially unable to provide information about possible mutual interactions of amino acid residues in different positions. Using a statistical design to select the most informative compounds to use in the QSAR study, it was possible to analyse the effects on HLA-B27 peptide binding of different amino acids in four positions by means of only nine peptides. The relative binding activity of these peptides could then be modeled mathematically to provide information about the relative contribution of each of the four positions and to suggest a new peptide with high binding affinity. Our results demonstrate the usefulness of the chemometric strategy for studying peptides of interest in molecular immunology.
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Affiliation(s)
- P Rovero
- Istituto di Mutagenesi e Differenziamento, CNR, Pisa, Italy
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Bonelli D, Coata G, Cruciani G, Clementi S, Marsili M. A comparative chemometric study of QSAR descriptors. Farmaco 1990; 45:293-301. [PMID: 2383345] [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: 12/31/2022]
Abstract
Traditional descriptors for Qsar models are compared with two alternative blocks obtained by computer chemistry tools: electronic densities and principal properties. All three sets show similar prediction abilities by PLS modelling.
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Affiliation(s)
- D Bonelli
- Dipartimento di Chimica, Università di Perugia, Italy
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De Meo G, Pedini M, Ricci A, Bastianini L, Jacquignon PC, Bonelli D, Clementi S, Cruciani G. Chemometric approach in a QSAR study: the antibacterial and antimicotic activities of benzofused heteroaromatic derivatives. Farmaco 1990; 45:313-30. [PMID: 2383346] [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: 12/31/2022]
Abstract
In order to establish quantitative relationships between the antibacterial activities of a number of thienyl- and furyl-benzimidazoles and benzoxazoles, the biological data were measured homogeneously for a selected set of 16 representative compounds of the available set of 103. The data were analyzed by the PLS method. The results of linear PLS modelling and PLS response surface modelling permitted a straightforward interpretation of the structural features relevant to the activities and the prediction of a possible optimal structure.
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Affiliation(s)
- G De Meo
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Italy
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Musumarra G, Scarlata G, Romano G, Cappello G, Clementi S, Giulietti G. Qualitative organic analysis. Part 2. Identification of drugs by principal components analysis of standardized TLC data in four eluent systems and of retention indices on SE 30. J Anal Toxicol 1987; 11:154-63. [PMID: 3626528 DOI: 10.1093/jat/11.4.154] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The principal components (PC) analysis of standardized Rf values in four eluent systems [ethyl acetate/methanol/30% ammonia (85:10:15), cyclohexane/toluene/diethylamine (65:25:10), ethyl acetate/chloroform (50:50), and acetone with the plate dipped in potassium hydroxide solution] and of gas chromatographic retention indices in SE 30 for 277 compounds provided a two-principal-components model that explains 82% of the total variance. The scores plot allowed identification of unknowns or restriction of the range of inquiry to very few candidates. Comparison of these candidates with those selected from another PC model derived from TLC data only allowed identification of the drug in all the examined cases.
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Musumarra G, Scarlata G, Cirma G, Romano G, Palazzo S, Clementi S, Giulietti G. Qualitative organic analysis. I. Identification of drugs by principal components analysis of standardized thin-layer chromatographic data in four eluent systems. J Chromatogr A 1985; 350:151-68. [PMID: 4093478 DOI: 10.1016/s0021-9673(01)93515-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Principal component analysis of standardized RF values in four eluent systems [ethyl acetate-methanol-30% ammonia (85:10:15), cyclohexane-toluene-diethylamine (65:25:10), ethyl acetate-chloroform (50:50) and acetone, with the plate dipped in potassium hydroxide solution] provided a two-component model which accounts for 73% of the total variance. The "scores" plot allowed the restriction of the range of inquiry to a few candidates. This result is of great practical significance in analytical toxicology, especially when account is taken of the cost, the time, the analytical instrumentation and the simplicity of the calculations required by the method.
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Musumarra G, Scarlata G, Romano G, Clementi S, Wold S. Application of Principal Components Analysis to TLC Data for 596 Basic and Neutral Drugs in Four Eluent Systems. J Chromatogr Sci 1984. [DOI: 10.1093/chromsci/22.12.538] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Musumarra G, Scarlata G, Ramano G, Clementi S. Identification of drugs by principal components analysis of Rf data obtained by TLC in different eluent systems. J Anal Toxicol 1983; 7:286-92. [PMID: 6664083 DOI: 10.1093/jat/7.6.286] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The retention factor of 54 drugs in eight eluent mixtures is reported. Principal component analysis (PCA) of these data provided a significant two-components model. These two parameters characteristic for each drug allowed an objective identification of unknown samples, provided they were included in the considered set. The analysis showed that the eluent mixtures cluster into three groups. The PCA model, using only three eluents (one for each group), was also able to restrict the range of inquiry to a few "candidates" and, in some cases, to allow unambiguous identification of the drug. These results, based on a simple and quick analytical determination (thin layer chromatography) and a reliable statistical procedure (PCA), appear to be of significant practical importance in the field of analytical toxicology.
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Clementi S, Linda P, Marino G. Electrophilic substitutions in five-membered heteroaromatic systems. Part XII. A quantitative study on the reactivities of the α- and β-positions of benzofuran and benzothiophen in electrophilic substitutions. ACTA ACUST UNITED AC 1971. [DOI: 10.1039/j29710000079] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Clementi S, Genel F, Marino G. Relative reactivities of thiophen, furan, and pyrrole rings in electrophilic substitutions: trifluoroacetylation. ACTA ACUST UNITED AC 1967. [DOI: 10.1039/c19670000498] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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