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Balaban DV, Coman L, Balaban M, Zoican A, Pușcașu DA, Ayatollahi S, Mihălțeanu E, Costache RS, Ioniță-Radu F, Jinga M. Glycemic Abnormalities in Pancreatic Cystic Lesions—A Single-Center Retrospective Analysis. Gastroenterology Insights 2023; 14:191-203. [DOI: doi.org/10.3390/gastroent14020015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/02/2023] Open
Abstract
Background and Objectives: Glucose metabolism alterations are very common in solid pancreatic lesions, particularly in pancreatic cancer. Similarly, diabetes and especially new-onset diabetes (NOD) have been associated with the malignant transformation of pancreatic cysts. We aimed to assess the prevalence and relevant associations of glycemic abnormalities in pancreatic cystic lesions (PCLs) in a retrospective analysis. Materials and Methods: We retrospectively recruited all patients who underwent endoscopic ultrasound for a PCL over a period of 36 months (January 2018 to December 2021). Final diagnosis was set by means of tissue acquisition, surgery, follow-up, or board decision. Demographic and clinical data, laboratory workup, and imaging features were extracted from the patients’ charts according to a predefined protocol. We considered fasting blood glucose (FBG) and HbA1c values and stratified the patients as nondiabetic (FBG ≤ 99 mg/dL, HbA1c ≤ 5.6%, no history of glycemic abnormalities), prediabetic (FBG 100–125 mg/dL, HbA1c 5.7–6.4%), or diabetic (long-lasting diabetes or NOD). Results: Altogether, 81 patients were included, with a median age of 66 years, and 54.3% of them were male. The overall prevalence of fasting hyperglycemia was 54.3%, comprising 34.6% prediabetes and 22.2% diabetes, of which 16.7% had NOD. The mean FBG and HbA1c levels were higher in malignant and premalignant PCLs (intraductal papillary mucinous neoplasm (IPMN), mucinous cystic neoplasm (MCN), cystadenocarcinoma, and cystic neuroendocrine tumor) compared to the benign lesions (pseudocysts, walled-off necrosis, and serous cystadenoma): 117.0 mg/dL vs. 108.3 mg/dL and 6.1% vs. 5.5%, respectively. Conclusions: Hyperglycemia and diabetes are common in PCLs, with a high prevalence in premalignant and malignant cysts. Screening and follow-up for glycemic abnormalities should be routinely conducted for PCLs, as they can contribute to a tailored risk assessment of cysts.
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Affiliation(s)
- Daniel Vasile Balaban
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Laura Coman
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Marina Balaban
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Andreea Zoican
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Danusia Adriana Pușcașu
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Simin Ayatollahi
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Emanuela Mihălțeanu
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Raluca Simona Costache
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Florentina Ioniță-Radu
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Mariana Jinga
- Internal Medicine and Gastroenterology Department, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
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Balaban DV, Coman L, Marin FS, Balaban M, Tabacelia D, Vasilescu F, Costache RS, Jinga M. Metastatic Renal Cell Carcinoma to Pancreas: Case Series and Review of the Literature. Diagnostics (Basel) 2023; 13:1368. [DOI: doi.org/10.3390/diagnostics13081368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023] Open
Abstract
Metastasis to the pancreas represents a small proportion of all pancreatic malignancies. Among primary tumors that metastasize to the pancreas, renal cell carcinoma (RCC) is one of the most common causes of metastatic pancreatic lesions. We herein report a case series of three patients with pancreatic metastasis from RCC. The first is a 54-year-old male with a history of left nephrectomy for RCC, in whom an isthmic pancreatic mass suggestive of a neuroendocrine lesion was found during oncological follow-up. Endoscopic ultrasound (EUS)-guided fine needle biopsy (FNB) identified pancreatic metastasis of RCC and the patient was referred for surgery. The second case is a 61-year-old male, hypertensive, diabetic, with left nephrectomy for RCC six years previously, who complained of weight loss and was found with a hyperenhancing mass in the head of the pancreas and a lesion with a similar pattern in the gallbladder. EUS-FNB from the pancreas proved to be a metastatic pancreatic lesion. Cholecystectomy and treatment with tyrosine kinase inhibitors were recommended. The third case is a 68-year-old dialysis patient referred for evaluation of a pancreatic mass, also confirmed by EUS-FNB, who was started on sunitinib treatment. We report a literature summary on epidemiology and clinical features, diagnosis and differential diagnosis and treatment and outcomes in pancreatic metastasis of RCC.
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Affiliation(s)
- Daniel Vasile Balaban
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Laura Coman
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Flavius Stefan Marin
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Marina Balaban
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Daniela Tabacelia
- Gastroenterology Department, Saint Mary’s Clinical Hospital, 011172 Bucharest, Romania
| | - Florina Vasilescu
- Pathology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Raluca Simona Costache
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Mariana Jinga
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
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Balaban DV, Coman L, Marin FS, Balaban M, Tabacelia D, Vasilescu F, Costache RS, Jinga M. Metastatic Renal Cell Carcinoma to Pancreas: Case Series and Review of the Literature. Diagnostics (Basel) 2023; 13:diagnostics13081368. [PMID: 37189469 DOI: 10.3390/diagnostics13081368] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/27/2023] [Accepted: 04/01/2023] [Indexed: 05/17/2023] Open
Abstract
Metastasis to the pancreas represents a small proportion of all pancreatic malignancies. Among primary tumors that metastasize to the pancreas, renal cell carcinoma (RCC) is one of the most common causes of metastatic pancreatic lesions. We herein report a case series of three patients with pancreatic metastasis from RCC. The first is a 54-year-old male with a history of left nephrectomy for RCC, in whom an isthmic pancreatic mass suggestive of a neuroendocrine lesion was found during oncological follow-up. Endoscopic ultrasound (EUS)-guided fine needle biopsy (FNB) identified pancreatic metastasis of RCC and the patient was referred for surgery. The second case is a 61-year-old male, hypertensive, diabetic, with left nephrectomy for RCC six years previously, who complained of weight loss and was found with a hyperenhancing mass in the head of the pancreas and a lesion with a similar pattern in the gallbladder. EUS-FNB from the pancreas proved to be a metastatic pancreatic lesion. Cholecystectomy and treatment with tyrosine kinase inhibitors were recommended. The third case is a 68-year-old dialysis patient referred for evaluation of a pancreatic mass, also confirmed by EUS-FNB, who was started on sunitinib treatment. We report a literature summary on epidemiology and clinical features, diagnosis and differential diagnosis and treatment and outcomes in pancreatic metastasis of RCC.
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Affiliation(s)
- Daniel Vasile Balaban
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Laura Coman
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Flavius Stefan Marin
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Marina Balaban
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Daniela Tabacelia
- Gastroenterology Department, Saint Mary's Clinical Hospital, 011172 Bucharest, Romania
| | - Florina Vasilescu
- Pathology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Raluca Simona Costache
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Mariana Jinga
- Internal Medicine and Gastroenterology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Gastroenterology Department, Central Military Emergency University Hospital, 010825 Bucharest, Romania
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Coman L, Păunescu H, Catană R, Coman LI, Voiculescu Ş, Coman OA. ALZHEIMER'S DISEASE - ESTROGENS AND SELECTIVE ESTROGEN RECEPTOR MODULATORS, FRIENDS OR FOES? Acta Endocrinol (Buchar) 2017; 13:77-83. [PMID: 31149152 DOI: 10.4183/aeb.2017.77] [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] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Alzheimer's disease(AD) is the leading cause of dementia and is characterized by the presence of extensive plaque deposition and neurofibrillary pathology. The aim of the present study was to make an update regarding the influence of estrogens and SERMs on inflammation and on the resolution of inflammation, respectively, focusing on these most important features implicated in the pathophysiology of AD. Several hypothesised mechanisms of action of estrogens and SERM are exposed and also some relevant clinical studies on this subject are analysed. The analyzed studies have a high heterogeneity of preparations used, of administration routes, of the female population included and of the periods of time from the appearance/induction of menopause to the therapeutic intervention and also of follow-up periods of patients and of the means of evaluating their cognitive decline. One can say that all the ways of pharmacological influence on the membrane or intracellular signalling system associated to estrogens that may have clinical importance in the prevention and possibly in the treatment of AD have not been exhausted. Estrogens with selective ERα or G protein-coupled estrogen receptors (GPER1 or GqMER) effects could be used to influence the resolution of inflammation process, with positive effects on AD evolution.
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Affiliation(s)
- L Coman
- "Carol Davila" University of Medicine and Pharmacy, Faculty of Pharmacy, Dept. of Physiology, Bucharest, Romania
| | - H Păunescu
- "Carol Davila" University of Medicine and Pharmacy, Faculty of Pharmacy, Dept. of Pharmacology and Pharmacotherapy, Bucharest, Romania
| | - R Catană
- "Carol Davila" University of Medicine and Pharmacy, Faculty of Pharmacy, Dept. of Pathophysiology and Immunology, Bucharest, Romania
| | - L I Coman
- "Carol Davila" University of Medicine and Pharmacy, Faculty of Pharmacy, Student, Bucharest, Romania
| | - Ş Voiculescu
- "Carol Davila" University of Medicine and Pharmacy, Faculty of Pharmacy, Dept. of Surgery, Bucharest, Romania
| | - O A Coman
- "Carol Davila" University of Medicine and Pharmacy, Faculty of Pharmacy, Dept. of Pharmacology and Pharmacotherapy, Bucharest, Romania
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Mihail A, Coman G, Staniceanu F, Coman L, Zurac S, Coman OA. Reelin and its receptors, VLDLR and ApoER2, in melanocytic nevi. J Med Life 2017; 10:85-89. [PMID: 28255385 PMCID: PMC5304381] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Reelin is an extracellular signaling protein synthesized by Cajal-Retius cells in utero and early after birth, its presence being signaled in adult life too. Reelin acts on its receptors, VLDLR and ApoER2, acting on cytoskeleton, controlling migration and subsequently positioning and stabilizing the cortical neurons. We investigated the reelin presence and its receptors, VLDLR and ApoER2, in melanocytic nevi considering the neural crest origin of the nevus cells and their migration into skin during embrionary period. Melanocytic nevi present a strict cellular architecture and an increased malignant transforming capacity. We investigated reelin presence in 32 melanocytic nevi (5 junctional, 27 compound or 14 dysplastic nevi and 18 non dysplastic nevi). The assessment of reelin presence was performed by histological semiquantitative criteria. Results showed the presence of reelin in 29 cases (29/ 32). The presence of reelin was elevated in junctional areas as in dysplastic nevi. VLDLR presented positive values in 16 cases (16/ 32) and ApoER2 was weak positive in 7 cases. Reelin or its receptors was peritumorally absent. Our study showed the presence of reelin in nevus cells from cutaneous melanocytic nevi and, in these cells, only the VLDLR receptor was present in half of the cases. The significance of the reelin presence in cutaneous nevus cells may be hypothetically considered correlated with the position maintenance of the nevus cells or migration of these cells in malignant transforming situation. Abbreviations: ApoER2 = apolipoprotein receptor 2, VLDLR = very low density lipoprotein receptor, DAB-1 = DIABLO protein, HMB45 = gene HMB45.
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Affiliation(s)
- A Mihail
- Department of Dermatology, “Dr. Victor Babeş” Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania
,Department of Dermatology, “Titu Maiorescu” University, Bucharest, Romania
| | - G Coman
- Department of Dermatology, “Dr. Victor Babeş” Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania
| | - F Staniceanu
- Department of Pathology, “Colentina” Clinical Hospital Bucharest, Romania
| | - L Coman
- Department of Physiology, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
| | - S Zurac
- Department of Pathology, “Colentina” Clinical Hospital Bucharest, Romania
| | - OA Coman
- Department of Dermatology, “Dr. Victor Babeş” Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania
,Department of Pharmacology, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
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Coman L, Wilkins S. Problem-based learning (PBL): how do students think they should be evaluated in tutorials? Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.443] [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]
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Costescu M, Coman OA, Tampa M, Tudose I, Coman L, Georgescu SR. Axillary basal cell carcinoma--a rare form of a frequent kind of carcinoma. Rom J Morphol Embryol 2013; 54:851-856. [PMID: 24322039] [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: 06/03/2023]
Abstract
Basal cell carcinoma (BCC) is the most common cutaneous cancer. It seems that the most important prognostic factor is exposure to ultraviolet radiation (solar and artificial), correlated with other factors as well. In this article, we aimed to review basal cell carcinoma located in the axilla, referring to cases from our hospital. Axillary location of BCC is rare, with a very low number of cases quoted in the literature, compared to the high prevalence of basal cell carcinoma in the general population. During a period of two years, we detected only four cases of axillary basal cell carcinoma out of a total number of 921 cases diagnosed as BCC. We were interested in identifying certain factors involved in causing BCC, post-excision clinical evolution, histological type and aggressiveness of axillary basal cell carcinoma. Therefore, we quantified objectively the tumor and stromal expression of some immunological markers like: metalloproteinases MMP1, 3, 11, Ber-EP4 and Ki67. Histological types of tumors investigated here belong to the category of non-aggressive BCC, namely as nodular and superficial, although Ki67 index is greater than the average reported in the literature for this type of tumor. MMPs exhibited increased expression in tumors and stromal compartments, especially at the tumor invasion front, and was not associated with tumor ulceration or surrounding tissue remodeling-related changes. Our results confirm the literature data concerning the involvement of MMPs in BCC progression, whatever the tumor location is.
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Affiliation(s)
- Monica Costescu
- Department of Dermatology, "Carol Davila" University of Medicine and Pharmacy, "Victor Babes" Hospital, Bucharest, Romania;
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Boeglin WU, Coman L, Ambrozewicz P, Aniol K, Arrington J, Batigne G, Bosted P, Camsonne A, Chang G, Chen JP, Choi S, Deur A, Epstein M, Finn JM, Frullani S, Furget C, Garibaldi F, Gayou O, Gilman R, Hansen O, Hayes D, Higinbotham DW, Hinton W, Hyde C, Ibrahim H, de Jager CW, Jiang X, Jones MK, Kaufman LJ, Klein A, Kox S, Kramer L, Kumbartzki G, Laget JM, LeRose J, Lindgren R, Margaziotis DJ, Markowitz P, McCormick K, Meziani Z, Michaels R, Milbrath B, Mitchell J, Monaghan P, Moteabbed M, Moussiegt P, Nasseripour R, Paschke K, Perdrisat C, Piasetzky E, Punjabi V, Qattan IA, Quéméner G, Ransome RD, Raue B, Réal JS, Reinhold J, Reitz B, Roché R, Roedelbronn M, Saha A, Slifer K, Solvignon P, Sulkosky V, Ulmer PE, Voutier E, Weinstein LB, Wojtsekhowski B, Zeier M. Probing the high momentum component of the deuteron at high Q2. Phys Rev Lett 2011; 107:262501. [PMID: 22243152 DOI: 10.1103/physrevlett.107.262501] [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] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Indexed: 05/31/2023]
Abstract
The (2)H(e,e'p)n cross section at a momentum transfer of 3.5 (GeV/c)(2) was measured over a kinematical range that made it possible to study this reaction for a set of fixed missing momenta as a function of the neutron recoil angle θ(nq) and to extract missing momentum distributions for fixed values of θ(nq) up to 0.55 GeV/c. In the region of 35°≤θ(nq)≤45° recent calculations, which predict that final-state interactions are small, agree reasonably well with the experimental data. Therefore, these experimental reduced cross sections provide direct access to the high momentum component of the deuteron momentum distribution in exclusive deuteron electrodisintegration.
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Affiliation(s)
- W U Boeglin
- Florida International University, University Park, Florida 33199, USA
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Cirimbei C, Prunoiu V, Marincaş M, Daha C, Cirimbei S, Stefan I, Man C, Brătucu E, Pantiş C, Rădoi S, Romoşan M, Diaconu C, Zamfir C, Nechita D, Coman L. [Radiofrequency ablation for liver metastases--mini invasive therapeutic option for patients with unresecable tumors]. Chirurgia (Bucur) 2011; 106:465-473. [PMID: 21991871] [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
UNLABELLED Radiofrequency ablations (RFA), a new therapeutic option for liver metastases, proceeded by open surgery or laparoscopic approach, provide an acceptable control of local tumor process, involved lower risks than resection surgery. OBJECTIVES We analyzed this procedure, for classic indication in hepatic metastatic tumors, based on four years experience, focused on perioperative complications, recurrence rate and long distant evolution. METHOD Between December 2006 and December 2010, 61 patients with liver metastases underwent RFA; 46 cases had metastatic lesions from colo-rectal cancer, 9 cases from breast cancer, 4 cases from gastric cancer and 2 cases from ovarian cancer. RFA was performed in 55 patients via open surgery and laparoscopic approach in 6 patients. Postoperative course was followed with CT scan at 1 month, and then at 3 month interval, in correlation with tumor markers level. RESULTS Perioperative complications occurred in 8 cases, consist of prolonged fever, severe hepatic cytolysis, without other complications such, biliary tract injury, hemorrhage, and peritonitis; no mortality caused by RFA procedure. 10 cases had local recurrence, at 6 and 25 month after post RFA procedure. CONCLUSIONS Initial experience shows that RFA is a safe procedure for treatment of liver metastases, with low rate of morbidity and local recurrence, indicated for patients with unresecable lesions or high risks for surgical resection.
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Affiliation(s)
- C Cirimbei
- Clinica de Chirurgie Nr. 1, Institutul Oncologic Bucureşti, România.
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Păunescu H, Coman OA, Coman L, Ghiţă I, Georgescu SR, Drăia F, Fulga I. Cannabinoid system and cyclooxygenases inhibitors. J Med Life 2011; 4:11-20. [PMID: 21505570 PMCID: PMC3056416] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2010] [Accepted: 01/25/2011] [Indexed: 10/24/2022] Open
Abstract
RATIONALE The cannabinoid system consists of a complex array of receptors, substances with agonist/antagonist properties for those receptors, biosynthetic machineries and mechanisms for cellular uptake and degradation for endocannabinoids. This system is in interrelation with other systems that comprise lipid mediators like prostaglandins/leukotrienes systems. A clear antagonist, additive or synergic effect of nonsteroidal anti-inflammatory drugs (NSAIDs)-cannabinoid associations was not yet demonstrated. Aim. The present study tried to summarize the existent data on NSAIDS-cannabinoid system interactions. METHODS AND RESULTS A bibliographic research in Medline, Scirus, Embase was made using as keywords cannabinoid, nonsteroidal anti-inflammatory drugs, aspirin, ibuprofen, flurbiprofen, diclofenac, indomethacin, acetaminophen, coxibs, antinociceptive, antinociception, analgesia DISCUSSIONS A systematization of the results focusing on the NSAIDs drugs interaction with the cannabinoid system was presented. Out of all the substances analyzed in the present review, acetaminophen was studied the most regarding its interferences with the cannabinoid system, mainly due to contradictory results. CONCLUSIONS Some NSAIDs have additional influences on the cannabinoid system either by inhibiting fatty acid amide hydrolase (FAAH) or by inhibiting a possible intracellular transporter of endocannabinoids. All the NSAIDs that inhibit COX2 can influence the cannabinoid system because a possible important degradative pathway for anandamide and 2-arachidonoyl glycerol might involve COX 2. One of the causes for the variety of experimental results presented might be due to pharmacokinetic mechanisms, depending on the route of administration and the dose
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Affiliation(s)
- H Păunescu
- Department of Pharmacology and Pharmacotherapy, ‘Carol Davila’ University of Medicine and PharmacyRomania
| | - OA Coman
- Department of Pharmacology and Pharmacotherapy, ‘Carol Davila’ University of Medicine and PharmacyRomania
| | - L Coman
- Department of Physiology, ‘Carol Davila’ University of Medicine and PharmacyRomania
| | - I Ghiţă
- Department of Pharmacology and Pharmacotherapy, ‘Carol Davila’ University of Medicine and PharmacyRomania
| | - SR Georgescu
- Department of Dermatology, ‘Carol Davila’ University of Medicine and PharmacyRomania
| | - F Drăia
- Department of Anatomy, ‘Carol Davila’ University of Medicine and PharmacyRomania
| | - I Fulga
- Department of Pharmacology and Pharmacotherapy, ‘Carol Davila’ University of Medicine and PharmacyRomania
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Nicolae I, Nicolae CD, Coman OA, Stefănescu M, Coman L, Ardeleanu C. Serum total gangliosides level: clinical prognostic implication. Rom J Morphol Embryol 2011; 52:1277-1281. [PMID: 22203934] [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: 05/31/2023]
Abstract
PURPOSE The gangliosides overexpression contributes to the development of skin melanoma. The purpose of this study was to determine if the total gangliosides serum levels might predict the tumor growth in patients with melanoma or if the transfer of shed cell gangliosides reflects the implication in the clinical prognostic of these patients. PATIENTS AND METHODS Total gangliosides serum levels were measured in the cryopreserved serum by estimating lipid-associated sialic acid in 761 patients before surgical resection of melanoma, in 406 patients with precancerous pigmentary lesions, and in 410 healthy individuals. This study was performed at the Dermatovenereological Research Center, Bucharest, Romania, during 1991-2010. All sera obtained after surgical resection of melanocytic tumors were analyzed to see if adjuvant therapy (chemo-, immuno-, immunochemo-therapy) induced gangliosides changes in melanoma patients and if the responses were correlated with survival. RESULTS Total gangliosides serum levels were higher in melanoma patients than in precancerous melanocytic lesions patients or in healthy individuals. Larger tumors in Breslow index and more advanced stage of disease were correlated with higher total gangliosides serum values. Augmented total gangliosides serum levels after melanoma adjuvant treatment were predictive for decreased overall survival, whereas decreased total gangliosides serum levels were predictable for improved overall survival. CONCLUSIONS A marker for early melanoma complications and survival may be the total gangliosides serum level.
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Affiliation(s)
- Ilinca Nicolae
- Research Dermatovenereological Center, Scarlat Longhin Hospital, Bucharest, Romania.
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Riordan S, Abrahamyan S, Craver B, Kelleher A, Kolarkar A, Miller J, Cates GD, Liyanage N, Wojtsekhowski B, Acha A, Allada K, Anderson B, Aniol KA, Annand JRM, Arrington J, Averett T, Beck A, Bellis M, Boeglin W, Breuer H, Calarco JR, Camsonne A, Chen JP, Chudakov E, Coman L, Crowe B, Cusanno F, Day D, Degtyarenko P, Dolph PAM, Dutta C, Ferdi C, Fernández-Ramírez C, Feuerbach R, Fraile LM, Franklin G, Frullani S, Fuchs S, Garibaldi F, Gevorgyan N, Gilman R, Glamazdin A, Gomez J, Grimm K, Hansen JO, Herraiz JL, Higinbotham DW, Holmes R, Holmstrom T, Howell D, de Jager CW, Jiang X, Jones MK, Katich J, Kaufman LJ, Khandaker M, Kelly JJ, Kiselev D, Korsch W, LeRose J, Lindgren R, Markowitz P, Margaziotis DJ, Beck SMT, Mayilyan S, McCormick K, Meziani ZE, Michaels R, Moffit B, Nanda S, Nelyubin V, Ngo T, Nikolenko DM, Norum B, Pentchev L, Perdrisat CF, Piasetzky E, Pomatsalyuk R, Protopopescu D, Puckett AJR, Punjabi VA, Qian X, Qiang Y, Quinn B, Rachek I, Ransome RD, Reimer PE, Reitz B, Roche J, Ron G, Rondon O, Rosner G, Saha A, Sargsian MM, Sawatzky B, Segal J, Shabestari M, Shahinyan A, Shestakov Y, Singh J, Sirca S, Souder P, Stepanyan S, Stibunov V, Sulkosky V, Tajima S, Tobias WA, Udias JM, Urciuoli GM, Vlahovic B, Voskanyan H, Wang K, Wesselmann FR, Vignote JR, Wood SA, Wright J, Yao H, Zhu X. Measurements of the electric form factor of the neutron up to Q2=3.4 GeV2 using the reaction 3He(e,e'n)pp. Phys Rev Lett 2010; 105:262302. [PMID: 21231649 DOI: 10.1103/physrevlett.105.262302] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Indexed: 02/05/2023]
Abstract
The electric form factor of the neutron was determined from studies of the reaction 3He(e,e'n)pp in quasielastic kinematics in Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a polarized target in which the nuclear polarization was oriented perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons that were registered in a large-solid-angle detector. More than doubling the Q2 range over which it is known, we find G(E)(n)=0.0236±0.0017(stat)±0.0026(syst), 0.0208±0.0024±0.0019, and 0.0147±0.0020±0.0014 for Q(2)=1.72, 2.48, and 3.41 GeV2, respectively.
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Affiliation(s)
- S Riordan
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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Slifer K, Rondón OA, Aghalaryan A, Ahmidouch A, Asaturyan R, Bloch F, Boeglin W, Bosted P, Carasco C, Carlini R, Cha J, Chen JP, Christy ME, Cole L, Coman L, Crabb D, Danagoulian S, Day D, Dunne J, Elaasar M, Ent R, Fenker H, Frlez E, Gaskell D, Gan L, Gomez J, Hu B, Jourdan J, Jones MK, Keith C, Keppel CE, Khandaker M, Klein A, Kramer L, Liang Y, Lichtenstadt J, Lindgren R, Mack D, McKee P, McNulty D, Meekins D, Mkrtchyan H, Nasseripour R, Niculescu I, Normand K, Norum B, Pocanic D, Prok Y, Raue B, Reinhold J, Roche J, Kiselev D, Savvinov N, Sawatzky B, Seely M, Sick I, Smith C, Smith G, Stepanyan S, Tang L, Tajima S, Testa G, Vulcan W, Wang K, Warren G, Wesselmann FR, Wood S, Yan C, Yuan L, Yun J, Zeier M, Zhu H. Probing quark-gluon interactions with transverse polarized scattering. Phys Rev Lett 2010; 105:101601. [PMID: 20867509 DOI: 10.1103/physrevlett.105.101601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2009] [Revised: 08/24/2010] [Indexed: 05/29/2023]
Abstract
We have extracted QCD matrix elements from our data on doubly polarized inelastic scattering of electrons on nuclei. We find the higher twist matrix element d˜2, which arises strictly from quark-gluon interactions, to be unambiguously nonzero. The data also reveal an isospin dependence of higher twist effects if we assume that the Burkhardt-Cottingham sum rule is valid. The fundamental Bjorken sum rule obtained from the a0 matrix element is satisfied at our low momentum transfer.
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Affiliation(s)
- K Slifer
- University of Virginia, Charlottesville, Virginia 22903, USA
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Drăghia A, Drăghia F, Coman L. The gastric mucosa in portal hypertension: structural and ultrastructural observations. Rom J Morphol Embryol 2010; 51:271-275. [PMID: 20495742] [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: 05/29/2023]
Abstract
The gastric mucosal lesions represent a frequent cause of hemorrhage in the portal hypertension (PHG) and in the hepatic cirrhosis. This study was undertaken to assess the structural and ultra structural modifications in the intimal lamina of the stomach in this pathology. The cells of mucosa show graded alterative transformations. In the gastric mucosa, some of the chief (enzymatic) cells present a quasi-normal histological organization; others increased alterations such as irregular and heterochromatic nuclei, fewer cytoplasm organelles, numerous clear vesicles and heterogeneous lysosomes. The parietal (oxyntic) cells show in their apical cytoplasm wide dilatations of the intracellular canalicles, vesicles, a reduced number of organelles and irregular nuclei. The enteroendocrine cells (APUD) present an increased number of granules and organelles in the cytoplasm. The connective inter-glandular tissue contains active fibroblasts, micro inflammatory zones, blood vessels with hypertrophied endothelium, irregular and dilated lumen. Subsequent to these alterations in the structures of the gastric mucosa in portal hypertension, the function of synthesis/excretion of the pepsinogen, lipase, hydrochloric acid, intrinsic factor, serotonin, etc. are affected.
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Affiliation(s)
- Alina Drăghia
- Department of Cellular and Molecular Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
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Coman L, Coman OA, Păunescu H, Drăghia F, Fulga I. VEGF-induced corneal neovascularisation in a rabbit experimental model. Rom J Morphol Embryol 2010; 51:327-336. [PMID: 20495752] [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: 05/29/2023]
Abstract
INTRODUCTION AND PURPOSE Various conditions may cause vascularization of the normally avascular cornea. The aim of the present study was to create a reproducible experimental model that could enable the investigation of the phenomena leading to corneal vascularization. This involved creating a software to record the experimental data, enabling a subsequent digital analysis based on the growth models. The VEGF-induced pattern of neovascularization was also investigated. MATERIAL AND METHODS Twenty-seven rabbits divided in groups were used for the purposes of the present study. Some of them underwent intracorneal implants with or without vascular endothelial growth factor (VEGF) pellets, using an original microsurgical technique. Central and peripheral corneal burns were induced to other groups of animals in order to mimic the neovascularization process induced by inflammation. Finally, Dexamethasone (Maxidex) was given intraocularly, on days 1 and 3 after the onset of neovascularisation, in rabbit groups with both corneal burns and VEGF-implants. Video recording and data analysis of the corneal vascularization were made with an advanced biomicroscope, a computerized imaging system and a special software. A histochemical study of the animals' eyes was also carried out. RESULTS AND DISCUSSION The recorded data showed the simplicity and reproducibility of the present experimental model. The results showed the importance of VEGF as an initiator and promoter of corneal vascularization through a non-inflammatory mechanism, quite different from the inflammation illustrated by the corneal burn. At the same time, Dexamethasone therapy proved its effectiveness in corneal angiogenesis induced by thermal burn, but not by VEGF-implant.
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Affiliation(s)
- L Coman
- Department of Physiology, Faculty of Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
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Cusanno F, Urciuoli GM, Acha A, Ambrozewicz P, Aniol KA, Baturin P, Bertin PY, Benaoum H, Blomqvist KI, Boeglin WU, Breuer H, Brindza P, Bydzovský P, Camsonne A, Chang CC, Chen JP, Choi S, Chudakov EA, Cisbani E, Colilli S, Coman L, Craver BJ, De Cataldo G, de Jager CW, De Leo R, Deur AP, Ferdi C, Feuerbach RJ, Folts E, Fratoni R, Frullani S, Garibaldi F, Gayou O, Giuliani F, Gomez J, Gricia M, Hansen JO, Hayes D, Higinbotham DW, Holmstrom TK, Hyde CE, Ibrahim HF, Iodice M, Jiang X, Kaufman LJ, Kino K, Kross B, Lagamba L, LeRose JJ, Lindgren RA, Lucentini M, Margaziotis DJ, Markowitz P, Marrone S, Meziani ZE, McCormick K, Michaels RW, Millener DJ, Miyoshi T, Moffit B, Monaghan PA, Moteabbed M, Muñoz Camacho C, Nanda S, Nappi E, Nelyubin VV, Norum BE, Okasyasu Y, Paschke KD, Perdrisat CF, Piasetzky E, Punjabi VA, Qiang Y, Raue B, Reimer PE, Reinhold J, Reitz B, Roche RE, Rodriguez VM, Saha A, Santavenere F, Sarty AJ, Segal J, Shahinyan A, Singh J, Sirca S, Snyder R, Solvignon PH, Sotona M, Subedi R, Sulkosky VA, Suzuki T, Ueno H, Ulmer PE, Veneroni P, Voutier E, Wojtsekhowski BB, Zheng X, Zorn C. High-resolution spectroscopy of Lambda16N by electroproduction. Phys Rev Lett 2009; 103:202501. [PMID: 20365979 DOI: 10.1103/physrevlett.103.202501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2008] [Revised: 09/14/2009] [Indexed: 05/29/2023]
Abstract
An experimental study of the (16)O(e,e'K(+))(Lambda)(16)N reaction has been performed at Jefferson Lab. A thin film of falling water was used as a target. This permitted a simultaneous measurement of the p(e,e'K(+))Lambda, Sigma(0) exclusive reactions and a precise calibration of the energy scale. A ground-state binding energy of 13.76+/-0.16 MeV was obtained for (Lambda)(16)N with better precision than previous measurements on the mirror hypernucleus (Lambda)(16)O. Precise energies have been determined for peaks arising from a Lambda in s and p orbits coupled to the p(1/2) and p(3/2) hole states of the (15)N core nucleus.
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Affiliation(s)
- F Cusanno
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Piazzale Aldo Moro 2, I-00185 Rome, Italy
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Coman OA, Păunescu H, Ghiţă I, Coman L, Bădărăru A, Fulga I. Beta 3 adrenergic receptors: molecular, histological, functional and pharmacological approaches. Rom J Morphol Embryol 2009; 50:169-179. [PMID: 19434307] [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: 05/27/2023]
Abstract
Different classes of receptors mediate norepinephrine and epinephrine effects, one of the most recently discovered being the beta 3 adrenergic ones. The paper has proposed itself to present the history of the discovery of beta 3 adrenergic receptors, different techniques for their identification, their structure, localization, genetic data and also the mechanism of regulation of their functions. It also contains an exhaustive approach regarding the histological localization and functions of beta 3 adrenergic receptors in different apparatus and systems, making evident their effect on glucidic, lipidic and energetic metabolism. The substances that influence beta 3 adrenergic receptors activities, especially the agonists, have been studied regarding their practical applications in the treatment of diabetes mellitus and of the disturbances of lipid metabolism.
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Affiliation(s)
- Oana Andreia Coman
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.
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Ron G, Glister J, Lee B, Allada K, Armstrong W, Arrington J, Beck A, Benmokhtar F, Berman BL, Boeglin W, Brash E, Camsonne A, Calarco J, Chen JP, Choi S, Chudakov E, Coman L, Craver B, Cusanno F, Dumas J, Dutta C, Feuerbach R, Freyberger A, Frullani S, Garibaldi F, Gilman R, Hansen O, Higinbotham DW, Holmstrom T, Hyde CE, Ibrahim H, Ilieva Y, de Jager CW, Jiang X, Jones MK, Kang H, Kelleher A, Khrosinkova E, Kuchina E, Kumbartzki G, LeRose JJ, Lindgren R, Markowitz P, May-Tal Beck S, McCullough E, Meekins D, Meziane M, Meziani ZE, Michaels R, Moffit B, Norum BE, Oh Y, Olson M, Paolone M, Paschke K, Perdrisat CF, Piasetzky E, Potokar M, Pomatsalyuk R, Pomerantz I, Puckett A, Punjabi V, Qian X, Qiang Y, Ransome R, Reyhan M, Roche J, Rousseau Y, Saha A, Sarty AJ, Sawatzky B, Schulte E, Shabestari M, Shahinyan A, Shneor R, Sirca S, Slifer K, Solvignon P, Song J, Sparks R, Subedi R, Strauch S, Urciuoli GM, Wang K, Wojtsekhowski B, Yan X, Yao H, Zhan X, Zhu X. Measurements of the proton elastic-form-factor ratio mu pG p E/G p M at low momentum transfer. Phys Rev Lett 2007; 99:202002. [PMID: 18233135 DOI: 10.1103/physrevlett.99.202002] [Citation(s) in RCA: 2] [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] [Received: 06/04/2007] [Indexed: 05/25/2023]
Abstract
High-precision measurements of the proton elastic form-factor ratio, mu pG p E/G p M, have been made at four-momentum transfer, Q2, values between 0.2 and 0.5 GeV2. The new data, while consistent with previous results, clearly show a ratio less than unity and significant differences from the central values of several recent phenomenological fits. By combining the new form-factor ratio data with an existing cross-section measurement, one finds that in this Q2 range the deviation from unity is primarily due to G p E being smaller than expected.
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Affiliation(s)
- G Ron
- Tel Aviv University, Tel Aviv 69978, Israel
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Iodice M, Cusanno F, Acha A, Ambrozewicz P, Aniol KA, Baturin P, Bertin PY, Benaoum H, Blomqvist KI, Boeglin WU, Breuer H, Brindza P, Bydzovský P, Camsonne A, Chang CC, Chen JP, Choi S, Chudakov EA, Cisbani E, Colilli S, Coman L, Craver BJ, De Cataldo G, de Jager CW, De Leo R, Deur AP, Ferdi C, Feuerbach RJ, Folts E, Fratoni R, Frullani S, Garibaldi F, Gayou O, Giulani F, Gomez J, Gricia M, Hansen JO, Hayes D, Higinbotham DW, Holmstrom TK, Hyde CE, Ibrahim HF, Jiang X, Kaufman LJ, Kino K, Kross B, Lagamba L, LeRose JJ, Lindgren RA, Lucentini M, Margaziotis DJ, Markowitz P, Marrone S, Meziani ZE, McCormick K, Michaels RW, Millener DJ, Miyoshi T, Moffit B, Monaghan PA, Moteabbed M, Muñoz Camacho C, Nanda S, Nappi E, Nelyubin VV, Norum BE, Okasyasu Y, Paschke KD, Perdrisat CF, Piasetzky E, Punjabi VA, Qiang Y, Raue B, Reimer PE, Reinhold J, Reitz B, Roche RE, Rodriguez VM, Saha A, Santavenere F, Sarty AJ, Segal J, Shahinyan A, Singh J, Sirca S, Snyder R, Solvignon PH, Sotona M, Subedi R, Sulkosky VA, Suzuki T, Ueno H, Ulmer PE, Urciuoli GM, Veneroni P, Voutier E, Wojtsekhowski BB, Ye Y, Zheng X, Zhou S, Zorn C. High resolution spectroscopy of (lambda)(12)B by electroproduction. Phys Rev Lett 2007; 99:052501. [PMID: 17930747 DOI: 10.1103/physrevlett.99.052501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2007] [Indexed: 05/25/2023]
Abstract
An experiment measuring electroproduction of hypernuclei has been performed in hall A at Jefferson Lab on a 12C target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a ring imaging Cherenkov detector were added to the hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed (Lambda)(12)B spectrum shows for the first time identifiable strength in the core-excited region between the ground-state s-wave Lambda peak and the 11 MeV p-wave Lambda peak.
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Affiliation(s)
- M Iodice
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, I-00146 Roma, Italy
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Wesselmann FR, Slifer K, Tajima S, Aghalaryan A, Ahmidouch A, Asaturyan R, Bloch F, Boeglin W, Bosted P, Carasco C, Carlini R, Cha J, Chen JP, Christy ME, Cole L, Coman L, Crabb D, Danagoulian S, Day D, Dunne J, Elaasar M, Ent R, Fenker H, Frlez E, Gan L, Gaskell D, Gomez J, Hu B, Jones MK, Jourdan J, Keith C, Keppel CE, Khandaker M, Klein A, Kramer L, Liang Y, Lichtenstadt J, Lindgren R, Mack D, McKee P, McNulty D, Meekins D, Mkrtchyan H, Nasseripour R, Niculescu I, Normand K, Norum B, Pocanic D, Prok Y, Raue B, Reinhold J, Roche J, Rohe D, Rondón OA, Savvinov N, Sawatzky B, Seely M, Sick I, Smith C, Smith G, Stepanyan S, Tang L, Testa G, Vulcan W, Wang K, Warren G, Wood S, Yan C, Yuan L, Yun J, Zeier M, Zhu H. Proton spin structure in the resonance region. Phys Rev Lett 2007; 98:132003. [PMID: 17501192 DOI: 10.1103/physrevlett.98.132003] [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] [Received: 08/01/2006] [Indexed: 05/15/2023]
Abstract
We have examined the spin structure of the proton in the region of the nucleon resonances (1.085 GeV<W<1.910 GeV) at an average four momentum transfer of Q2=1.3 GeV2. Using the Jefferson Lab polarized electron beam, a spectrometer, and a polarized solid target, we measured the asymmetries A|| and A(perpendicular) to high precision, and extracted the asymmetries A1 and A2, and the spin structure functions g1 and g2. We found a notably nonzero A(perpendicular), significant contributions from higher-twist effects, and only weak support for polarized quark-hadron duality.
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Coman OA, Savu OR, Ghiţă I, Păunescu H, Coman L, Fulga I. [Effects of serotonin on reactivity of ocular vasculature]. Oftalmologia 2007; 51:126-133. [PMID: 18543689] [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: 05/26/2023]
Abstract
INTRODUCTION Serotonin presents specific receptors of many types and subtypes. The aim of this study was to analyze the differences in reactivity between the vessels (arteries and veins) of the iris and conjunctiva. The vascular diameter was measured using a noninvasive technique after intraocular administration of different doses of serotonin. MATERIAL AND METHODS The tests were performed on rats, divided in control and study groups. The modifications of studied vessels' diameters before and after topical administration of the solutions were evaluated by measuring these diameters at fixed time intervals of 30 seconds, for 6 minutes. Differentiation between arteries and veins was made using topical administration of felodipine after the testing 6 minutes interval The statistical significance of differences between the values obtained in each interval of 30 seconds and the control values at the initial moment was evaluated using t-test, the "paired" variant. RESULTS There were obtained differences in reactivity between iris and conjunctival vessels and between iris arteries and veins for the different concentrations of tested serotonin solutions. CONCLUSIONS Iris and conjunctival vessels contain serotonin receptors with different types and densities, whose activation produced vasoconstriction in both territories, but with different evolution and intensity. Differences in reactivity were found between iris arteries and veins, probably due to a different density of receptors between those two territories. The different vascular response might be a protective mechanism against dissemination of conjunctival infections.
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Warren G, Wesselmann F, Zhu H, McKee P, Savvinov N, Zeier M, Aghalaryan A, Ahmidouch A, Arenhövel H, Asaturyan R, Ben-Dayan I, Bloch F, Boeglin W, Boillat B, Breuer H, Brower J, Carasco C, Carl M, Carlini R, Cha J, Chant N, Christy E, Cole L, Coman L, Coman M, Crabb D, Danagoulian S, Day D, Duek K, Dunne J, Elaasar M, Ent R, Farrell J, Fatemi R, Fawcett D, Fenker H, Forest T, Garrow K, Gasparian A, Goussev I, Gueye P, Harvey M, Hauger M, Herrera R, Hu B, Jaegle I, Jones M, Jourdan J, Keith C, Kelly J, Keppel C, Khandaker M, Klein A, Klimenko A, Kramer L, Krusche B, Kuhn S, Liang Y, Lichtenstadt J, Lindgren R, Liu J, Lung A, Mack D, Maclachlan G, Markowitz P, McNulty D, Meekins D, Mitchell J, Mkrtchyan H, Nasseripour R, Niculescu I, Normand K, Norum B, Opper A, Piasetzky E, Pierce J, Pitt M, Prok Y, Raue B, Reinhold J, Roche J, Rohe D, Rondon O, Sacker D, Sawatzky B, Seely M, Sick I, Simicevic N, Smith C, Smith G, Steinacher M, Stepanyan S, Stout J, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Vlahovic B, Vulcan B, Wang K, Wells S, Woehrle H, Wood S, Yan C, Yanay Y, Yuan L, Yun J, Zihlmann B. Measurement of the electric form factor of the neutron at Q2=0.5 and 1.0 GeV2/c2. Phys Rev Lett 2004; 92:042301. [PMID: 14995367 DOI: 10.1103/physrevlett.92.042301] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Indexed: 05/24/2023]
Abstract
The electric form factor of the neutron was determined from measurements of the d-->(e-->,e'n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia (15ND3) target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find G(n)(E)=0.0526+/-0.0033(stat)+/-0.0026(sys) and 0.0454+/-0.0054+/-0.0037 at Q(2)=0.5 and 1.0 (GeV/c)(2), respectively.
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Affiliation(s)
- G Warren
- Universität Basel, CH-4056 Basel, Switzerland
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