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Fragoso YD. Differential diagnosis of multiple sclerosis in Latin America. Mult Scler J Exp Transl Clin 2017; 3:2055217317714279. [PMID: 28979790 PMCID: PMC5617098 DOI: 10.1177/2055217317714279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/06/2017] [Accepted: 05/15/2017] [Indexed: 12/19/2022] Open
Abstract
Improvement of multiple sclerosis (MS) diagnoses leads to earlier and correct disease management. The differential diagnostic workup for MS comprises a large variety of medical conditions. There are general guidelines and criteria for diagnosing MS worldwide, but awareness of regional differences needs to be kept in mind. Latin American patients who are screened for MS diagnoses may require an approach that is not exactly the same as that used for patients in North America, western Europe or Asia. In the present review, the conditions that are important for the differential diagnoses of MS in Latin America are reviewed. They include infections, metabolic diseases, nutritional deficits and other autoimmune conditions that physicians in charge of these patients need to be familiar with.
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Affiliation(s)
- YD Fragoso
- MS Unit, Department of Neurology, Universidade Metropolitana de Santos, SP, Brazil
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Pei Z, Lang B, Fragoso YD, Shearer KD, Zhao L, Mccaffery PJA, Shen S, Ding YQ, McCaig CD, Collinson JM. The expression and roles of Nde1 and Ndel1 in the adult mammalian central nervous system. Neuroscience 2014; 271:119-36. [PMID: 24785679 PMCID: PMC4048543 DOI: 10.1016/j.neuroscience.2014.04.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 01/10/2014] [Revised: 04/08/2014] [Accepted: 04/18/2014] [Indexed: 11/01/2022]
Abstract
Mental and neurological illnesses affect one in four people. While genetic linkage analyses have shown an association of nuclear distribution factor E (NDE1, or NudE) and its ohnolog NDE-like 1 (NDEL1, or Nudel) with mental disorders, the cellular mechanisms remain unclear. In the present study, we have demonstrated that Nde1 and Ndel1 are differentially localised in the subventricular zone (SVZ) of the forebrain and the subgranular zone (SGZ) of the hippocampus, two regions where neurogenesis actively occurs in the adult brain. Nde1, but not Ndel1, is localized to putative SVZ stem cells, and to actively dividing progenitors of the SGZ. The influence of these proteins on neural stem cell differentiation was investigated by overexpression in a hippocampal neural stem cell line, HCN-A94. Increasing Nde1 expression in this neural stem cell line led to increased neuronal differentiation while decreasing levels of astroglial differentiation. In primary cultured neurons and astrocytes, Nde1 and Ndel1 were found to have different but comparable subcellular localizations. In addition, we have shown for the first time that Nde1 is heterogeneously distributed in cortical astrocytes of human brains. Our data indicate that Nde1 and Ndel1 have distinct but overlapping distribution patterns in mouse brain and cultured nerve cells. They may function differently and therefore their dosage changes may contribute to some aspects of mental disorders.
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Affiliation(s)
- Z Pei
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - B Lang
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom.
| | - Y D Fragoso
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom; Department of Neurology, Medical Faculty, Universidade Metropolitana de Santos, Sao Paulo, Brazil
| | - K D Shearer
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - L Zhao
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - P J A Mccaffery
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - S Shen
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom; Regenerative Medicine Institute, School of Medicine, NUI Galway, Galway, Ireland
| | - Y Q Ding
- Tongji University School of Medicine, 1239 Siping Road, Shanghai 200092, China
| | - C D McCaig
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - J M Collinson
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom.
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Melcon MO, Melcon CM, Bartoloni L, Cristiano E, Duran JC, Grzesiuk AK, Fragoso YD, Brooks JBB, Díaz V, Romero García KM, Cabrera Gomez JA, Abad P, Islas MAM, Gracia F, Diaz de Bedoya VFH, Ruiz MEC, Hackembruch JH, Oehninger C, Ketzoian CN, Soto A. Towards establishing MS prevalence in Latin America and the Caribbean. Mult Scler 2012; 19:145-52. [PMID: 22492129 DOI: 10.1177/1352458512441985] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A very high prevalence of multiple sclerosis (MS) has been reported in some Western European and North American countries. The few surveys of MS epidemiology in South America reveal lower prevalence rates, implying that susceptibility varies between distinct ethnic groups, thus forming an important determinant of the geographic distribution of the disease. The objective of this study is to review MS prevalence estimates in different Latin American and Caribbean countries. We reviewed surveys of regional MS prevalence from 1991 to 2011. Sources included an online database, authors' reports and proceedings or specific lectures from regional conferences. We obtained a total of 30 prevalence surveys from 15 countries, showing low/medium MS prevalence rates. Both the number and the quality of prevalence surveys have greatly improved in this region over recent decades. This is the first collaborative study to map the regional frequency of MS. Establishment of standardized methods and joint epidemiological studies will advance future MS research in Latin America and the Caribbean.
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Affiliation(s)
- M O Melcon
- Foundation for Neuroepidemiology Research, Junín, Argentina.
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Finkelsztejn A, Brooks JBB, Paschoal FM, Fragoso YD. What can we really tell women with multiple sclerosis regarding pregnancy? A systematic review and meta-analysis of the literature. BJOG 2011; 118:790-7. [PMID: 21401856 DOI: 10.1111/j.1471-0528.2011.02931.x] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Although several papers report on pregnancy and multiple sclerosis (MS), no systematic review of the literature has been carried out. Neurologists and obstetricians need to have proper information to discuss with women presenting with MS who consider pregnancy. OBJECTIVES Literature review and meta-analysis of data on pregnancy in women with MS. SEARCH STRATEGY The present work followed the recommendations of the PRISMA Statement. Using the PICO framework, the authors independently searched for the terms 'pregnancy' OR 'gestation' OR 'pregnant' AND 'multiple sclerosis' OR 'MS' in the following databases: EMBASE/Excerpta Medica, Medline, Pubmed, Scopus, Index Medicus, Biomed Central, Ebsco Fulltext, LILACS, Scielo and the Cochrane Database of Systematic Reviews. SELECTION CRITERIA only papers presenting original work with analysis of at least one of the outcomes among pregnant women with MS were included. DATA COLLECTION AND ANALYSIS Two independent workers performed the literature review. All the authors selected and read the relevant papers. Two other authors summarised data for analysis. MAIN RESULTS Twenty-two papers reporting on 13,144 women with MS and their pregnancies were analysed. A significant decrease in relapse rate was observed during pregnancy, followed by a significant increase after delivery. Miscarriages, low birthweight, prematurity, neonatal death and malformations were assessed among these women and their offspring. There seems to be a regional influence on the rates of caesarean sections and abortions among women with MS. Neonatal death and malformation rates did not seem to be particularly high. AUTHORS' CONCLUSIONS The present work provides evidence-based data that can be discussed with women with MS and their relatives when pregnancy is considered by these families.
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Affiliation(s)
- A Finkelsztejn
- Department of Neurology, HC de Porto Alegre, Porto Alegre, RS, Brazil
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Lima AM, Sapienza GB, Giraud VO, Fragoso YD. Odors as triggering and worsening factors for migraine in men. Arq Neuro-Psiquiatr 2011; 69:324-7. [DOI: 10.1590/s0004-282x2011000300011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2010] [Accepted: 12/27/2010] [Indexed: 01/07/2023]
Abstract
OBJECTIVE: To assess the role of odors in triggering or worsening migraine in men. METHOD: Ninety-eight male migraineurs from the general population were assessed individually through questionnaires. Environmental factors relating to their migraine were reported, with special focus on the role of odors. RESULTS: Odors were the second most frequent triggering factor for migraine attacks (48%), behind stressful situations (59%). Likewise, odors were the second most frequent worsening factor (73%), just behind excessive light (74%). Thirty-three individuals (33.4%) stated that odors were both triggering and worsening factors for their migraine attacks. Perfume, cigarette smoke and cleaning products were the most frequent migraine-related odors reported by these male migraineurs. CONCLUSION: This was the first study to assess the role of odors in migraine exclusively in men. There was a high degree of odor-related migraine among these men, thus suggesting that patient education could alert such individuals to gender-related factors, since different triggering and worsening factors have been reported by males and females.
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Affiliation(s)
- A M Lima
- Universidade Metropolitana de Santos, Brazil
| | | | - V O Giraud
- Universidade Metropolitana de Santos, Brazil
| | - Y D Fragoso
- Universidade Metropolitana de Santos, Brazil
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Martínez-Martín P, Raffaelli E, Titus F, Despuig J, Fragoso YD, Díez-Tejedor E, Liaño H, Leira R, Cornet ME, van Toor BS, Cámara J, Peil H, Vix JM, Ortiz P. Efficacy and safety of metamizol vs. acetylsalicylic acid in patients with moderate episodic tension-type headache: a randomized, double-blind, placebo- and active-controlled, multicentre study. Cephalalgia 2001; 21:604-10. [PMID: 11472387 DOI: 10.1046/j.1468-2982.2001.00216.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [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: 11/20/2022]
Abstract
We assessed the efficacy and safety of oral single doses of 0.5 and 1 g metamizol vs. 1 g acetylsalicylic acid (ASA) in 417 patients with moderate episodic tension-type headache included in a randomized, double-blind, placebo- and active-controlled, parallel, multicentre trial. Eligibility criteria included 18-65 years of age, history of at least two episodes of tension-type headache per month in the 3 months prior to enrollment, and successful previous pain relief with a non-opioid analgesic. Treatment arms were metamizol 0.5 g (n = 102), metamizol 1 g (n = 108), ASA 1 g (n = 102) and placebo (n = 105). The analgesic efficacy of 0.5 and 1 g metamizol vs. placebo was highly statistically significant (alpha: 0.025; one-sided) for sum of pain intensity differences, maximum pain intensity difference, number of patients with at least 50% pain reduction, time to 50% pain reduction, maximum pain relief and total pain relief. A trend towards an earlier onset of a more profound pain relief of 0.5 and 1 g metamizol over 1 g ASA was noticed. All medications including placebo were almost equally safe and well tolerated.
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Affiliation(s)
- P Martínez-Martín
- Department of Neurology, Hospital General Universitario de Getafe, Madrid, Spain
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Fragoso YD, Carrazana EJ. Low doses of gabapentin may be helpful in the management of chronic daily headache. MedGenMed 2000; 2:E52. [PMID: 11104498] [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: 02/18/2023]
Abstract
CONTEXT The difficult management of chronic daily headache and the lack of clinical trials for this medical condition led the authors to perform this study. Gabapentin has been successfully used for a variety of chronic pain conditions and therefore may be of use in the treatment of chronic headache. OBJECTIVE To assess the efficacy and safety of low doses of gabapentin in cases of chronic daily headache. DESIGN Open-label study on a series of cases of chronic daily headache. PATIENTS Twenty-one consecutive patients with primary headache lasting 4 or more hours a day, at least 15 days per month, were invited to participate in this open trial. They were treated with low doses of gabapentin for sufficient time to lead to a headache-free period of at least 7 consecutive days. A minimum of 1 follow-up visit and 1 phone call were made in the subsequent 6-9 months. MEASUREMENTS A simple "Patient Impression of Change" was used to evaluate the results. Patients were also invited to compare this treatment to previous ones, whenever possible. RESULTS The efficacy of the treatment with gabapentin was rated as "excellent" by 19% of the patients, "good" by 47.6%, "fair" by 19%, and "poor" by 14.4%. CONCLUSIONS Despite the inherent limitations of such a small open trial, the authors concluded that ratings of excellent and good by two thirds of this population of patients with chronic daily headache should encourage the setup of a large double-blind, multicentric, placebo-controlled trial of low doses of gabapentin for chronic daily headache.
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Affiliation(s)
- Y D Fragoso
- Universidade Federal de Sao Paulo, SP, Brazil
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Fragoso YD, Baroncelli C, Gibbons AP, Lemos CC, Martins FR, Morente CM, Yaginuma ES. Does effective secondary prevention of ischemic events start at hospitalization? MedGenMed 2000; 2:E23. [PMID: 11104469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Abstract
OBJECTIVE: To report a case of Hemicrania Continua in a female aged 17, who presented this kind of headache for 9 years without diagnosis. Although this may be a relatively rare primary headache, the immediate response to clinical treatment with indomethacin justifies this entity be better known. METHODS: Case report of a female adolescent who had presented Hemicrania Continua for many years, without diagnosis and adequate treatment. Review of the relevant medical literature by means of Medline. RESULTS: Treatment with low doses of indomethacin caused complete cessation of the headache. CONCLUSION: Hemicrania Continua must be considered as a diagnostic possibility for patients who present continuous unilateral headache, without abnormalities in the clinical, neurologic and laboratorial examination, irrespective of the age the headache starts. This is the youngest patient reported to have Hemicrania continua and it was brought to discussion by a medical student, aware of this possible diagnosis.
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Affiliation(s)
- Y D Fragoso
- Faculdade de Ciências Médicas de Santos, Santos, SP, Brazil
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Abstract
The authors describe the case of an adolescent who had suffered from unilateral continuous headache since she was 8 years old. Treatment with indomethacin 50 mg/day promptly relieved the pain which had affected her for the previous 9 years. To the best of our knowledge, this is the earliest onset of hemicrania continua reported.
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Affiliation(s)
- Y D Fragoso
- Department of Internal Medicine, Faculty of Medical Sciences of Santos, Rua Oswaldo Cruz 179, Santos, Sao Paulo CEP 11045-101, Brazil
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Abstract
OBJECTIVE To investigate the transport of alpha-tocopherol in lipoproteins of rabbits under normal diet and under acute loading of cholesterol. DESIGN Two New Zealand White rabbits were fed 14C-alpha-tocopherol acetate in a single oral dose and the recovery of radiolabel in lipoproteins and plasma was monitored. Low density lipoprotein (LDL) from these animals was obtained and labeled with [3H] cholesteryl ester. Three other rabbits were injected with this double-labeled LDL in the native form; while three other animals received this LDL in the acetylated form. RESULTS Plasma clearance, liver uptake and levels of radiolabel in high density lipoprotein (HDL) of animals injected with 14C[3H]acetyl LDL were significantly higher than those in animals injected with 14C[3H]native LDL. Larger particles of HDL, rich in apolipoprotein E (apoE) carried significantly higher levels of both labels in rabbits injected with acetylated LDL. CONCLUSION These results provide evidence for in vivo mechanisms of "reverse alpha-tocopherol transport", analogous to "reverse cholesterol transport".
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Affiliation(s)
- Y D Fragoso
- Department of Molecular & Cell Biology, University of Aberdeen, Scotland.
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Abstract
OBJECTIVE To review the neurologic manifestations of AIDS in patients who were admitted to Hospital Guilherme Alvaro (HGA) due to any clinical manifestation of the disease. DESIGN Case series. PATIENTS All HIV+ patients admitted to the Faculty Hospital (HGA) between July 96 and April 97 were included in this review. RESULTS From the 117 HIV+ patients admitted to hospitalization due to AIDS-related symptoms, 50 (42.7%) presented neurologic manifestations. The most prevalent of these was neurotoxoplasmosis (68%), but a variety of other neurologic diseases were observed. Only 36% of these 50 patients had neurological signs and symptoms as the main complaint for admission, 12% of the patients had at least complained of some neurologic dysfunction at the time of admission and 10% had no neurologic complaints at all. The remaining 42% (21 patients) only complained of neurologic manifestations of AIDS when specifically asked. CONCLUSIONS The prevalence of neurologic manifestations of AIDS is very high in patients admitted to hospital. Even in the absence of neurologic-related complaints, these patients have to be carefully questioned and examined in the search for an underlying neurologic complication which may present high morbidity and mortality.
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Affiliation(s)
- Y D Fragoso
- Department of Internal Medicine, Faculdade de Ciências Médicas de Santos, São Paulo, Brazil
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Fragoso YD, da Fonseca PL, Fortinguerra MB, Cominato L, Matte GDO, Oliveira CM. Management of primary headache in emergency services of Santos and surrounding towns. SAO PAULO MED J 1998; 116:1650-3. [PMID: 9778883 DOI: 10.1590/s1516-31801998000200002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES Primary headaches are often seen by Clinicians on duty at Emergency Services. We have investigated the treatment of such patients by 43 medical doctors who have been working at Emergency Services in the city of Santos and surrounding towns for many years. RESULTS We confirmed the high prevalence of primary headaches in Emergency Services. There seem to be diagnosis difficulties concerning differentiating attacks of migraine and tension type headache. We also observed that IV dipirone was the most frequently prescribed treatment for patients with primary headaches in this study. There is no protocol in the literature which recommends IV dipirone for the treatment of migraine attacks or other primary headaches. CONCLUSION It would be advisable to perform controlled double blind studies in order to verify the advantages of IV dipirone in the treatment of intense attacks primary headaches. We concluded that headache management recycling programs could be of interest for doctors who regularly work at Emergency Services.
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Affiliation(s)
- Y D Fragoso
- Department of Internal Medicine, Faculdade de Ciências Médicas de Santos, São Paulo, Brazil.
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Abstract
Two recent reports on reduction of migraine attacks during treatment with vitamin K antagonists have caught my attention. Being a migraine sufferer myself, with considerable improvement of my headache during the use of warfarin, I became interested in the subject. Recently, a young man sought my advice for migraine attacks which had worsened after the withdrawal of warfarin. The previous reports on migraine and warfarin involved elderly patients. I report now on these two patients in their 30s, one of them being myself (case 1), who have experienced reduction of migraine attacks during the use of warfarin.
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Affiliation(s)
- Y D Fragoso
- Department of Internal Medicine, Faculty of Medical Sciences of Santos, Sao Paulo, Brazil
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Skonner ER, Fragoso YD. The formation of large apo e-rich HDL particles in cholesterol-loaded rabbits in vivo. Z Gastroenterol 1996; 34 Suppl 3:145-6. [PMID: 8767493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- E R Skonner
- Department of Molecular and Cell Biology, University of Aberdeen, Marischal College, Scotland, UK
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Fragoso YD, Skinner ER. Cholesterol-loading of peripheral tissues alters the interconversion of high density lipoprotein subfractions in rabbits. Int J Biochem Cell Biol 1996; 28:151-63. [PMID: 8729002 DOI: 10.1016/1357-2725(95)00127-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
High density lipoprotein (HDL) has been implicated in the process of reverse cholesterol transport,by which surplus cholesterol is removed from peripheral tissues and transported to the liver for excretion. It has been suggested that some subfractions of HDL may have a particular role in this process, though the underlying mechanism remains unclear. The present study was aimed at investigating the role of specific subfractions of HDL in reverse cholesterol transport. The interconversion of HDL subfractions in normal and cholesterol-loaded rabbits was studied in vivo. Rabbit HDL was separated by heparin-Sepharose affinity chromatography into six subfractions (HDL(I)-HDL(VI)), which were progressively enriched with apolipoprotein E (apo E), and varied in diameter and composition. Total HDL and its subfractions were individually labelled with 14C sucrose and injected in the rabbits. When rabbits which were not acutely loaded with [3H]cholesterol were injected with 14C-HDL(I), 70% of the label remained in this fraction while less than 5% was recovered in HDL(VI), containing the largest particles and those most enriched in apo E. No label was detectable in the liver of these animals. In rabbits which had received a prior loading of cholesterol, an average of only 18.3% of the 14C label was present in HDL(I) while approx. 40% of the label was recovered in HDL(VI). On average, 5.1% of the total 14C injected in these rabbits was recovered in the liver. It is concluded that two alternative routes for reverse cholesterol transport may be operative. While a continuous cholesterol-clearance route may be provided by particles of HDL of intermediate size, another route may be operative for clearance of excess cholesterol loaded into peripheral endothelial cells.
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Affiliation(s)
- Y D Fragoso
- Department of Molecular and Cell Biology, University of Aberdeen, UK
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Fragoso YD, Skinner ER. Uptake of apolipoprotein E-rich and apolipoprotein E-poor subfractions of high-density lipoprotein by liver membranes and HepG2 cells. Biochem J 1995; 311 ( Pt 2):611-5. [PMID: 7487903 PMCID: PMC1136043 DOI: 10.1042/bj3110611] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Apolipoprotein (apo) E plays an important role in mediating high-density lipoprotein (HDL) cholesterol transport and uptake by the liver. Evidence for and against the existence of conventional liver receptors for HDL containing apoE have been reported, although the selective uptake of the cholesterol moiety of HDL has been demonstrated. The present study investigated the hepatic uptake of subfractions of HDL separated on the basis of their apoE content. Rabbit HDL and its apoE-rich and apoE-poor subfractions, separated by heparin-Sepharose affinity chromatography, were labelled in their apoprotein moieties with [14C]sucrose and in their cholesteryl ester moiety with 3H. No binding of either subfraction to rabbit liver membranes could be detected. With cultured HepG2 cells, however, there was a high uptake of 3H but a very low uptake of 14C from both HDL subfractions, demonstrating that selective uptake was operating. Addition of unlabelled apoE-poor HDL inhibited the uptake of both labels from the two subfractions to the same extent. These studies, which differed from previously reported investigations by employing native homologous HDL subfractions of known apolipoprotein composition, demonstrated that apoE is not directly involved in the selective uptake of HDL cholesterol by the liver. In the absence of specific binding sites on liver membranes, it is suggested that an alternative mechanism might exist for the clearance of HDL cholesterol from the plasma.
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Affiliation(s)
- Y D Fragoso
- Department of Molecular and Cell Biology, University of Aberdeen, Marischal College, Scotland, UK
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Abstract
An apolipoprotein (apo) E-rich and an apo E-poor fraction of high-density lipoprotein (HDL) were isolated from four healthy men by heparin-Sepharose affinity chromatography. On a cholesterol basis, the apo E-poor HDL fraction contained a third more alpha- and gamma-tocopherol and about a third less alpha- and beta-carotene than the apo E-rich HDL fraction. Plasma concentrations of HDL cholesterol were highly correlated with the contribution of the apo E-rich HDL subfraction to total HDL alpha-tocopherol (r = -0.990, P < 0.001).
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Affiliation(s)
- A J Brown
- Cardiovascular Research Unit, University of Edinburgh, Scotland, UK
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Fragoso YD, Skinner ER. The role of subfractions of high density lipoprotein in the in vivo transport of cholesterol from cholesterol-loaded hepatic and peripheral endothelial cells in the New Zealand white rabbit. Comp Biochem Physiol B 1993; 105:699-706. [PMID: 8365119 DOI: 10.1016/0305-0491(93)90108-h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
1. High density lipoprotein (HDL) of the New Zealand White rabbit was separated by heparin-Sepharose affinity chromatography into six distinct subfractions of different composition and particle size. 2. When human acetyl LDL containing [3H]cholesteryl linoleate was injected intravenously into rabbits to prime the endothelial cells with labelled cholesterol, only 1-2% of the radioactivity remained in the plasma after 2 hr. 3. After 4 hr, 60.1% of the plasma radioactivity was present in HDL and 25% of this was recovered in the largest particles of HDL (fraction VI, mean particle diameter 11.6-11.8 nm). 4. The concentration of these largest particles of HDL, rich in apolipoprotein E, were also relatively increased in acetyl-LDL-treated rabbits when compared to controls (P < 0.01). 5. In control in vitro experiments, 62.2% of the radioactivity recovered in HDL was associated with subfractions IV and V (mean particle diameter 10.2-10.8 nm) while only 5% was present in fraction VI. 6. The results show that large HDL particles enriched with apo E contain a large proportion of cholesterol previously supplied to hepatic and peripheral endothelial cells. 7. This study demonstrated that the rabbit provides a useful animal model for the study of the metabolism of subfractions of HDL in relation to reverse cholesterol transport.
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Affiliation(s)
- Y D Fragoso
- Department of Molecular and Cell Biology, University of Aberdeen, Marischal College, U.K
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Abstract
The effect of dietary supplementation with evening primrose oil (containing 70% gammalinolenic acid) on the concentration of plasma lipids and lipoproteins of the New Zealand White rabbit was investigated. No significant changes were observed in the concentrations of plasma cholesterol or triglycerides during the treatment, although an increase in high density lipoprotein (HDL) cholesterol (P < 0.01) was observed at 4 weeks of evening primrose oil intake and 2 weeks after withdrawal. However, when HDL subpopulations were resolved by gradient gel electrophoresis, major alterations were observed in the distribution of HDL subfractions. These included an increase in HDL2b (P < 0.001) and HDL3c (P < 0.001) and the appearance of very large particles of HDL. These findings suggest that supplementation of diets with n-6 fatty acids may be effective in the long-term prevention of atherosclerosis.
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Affiliation(s)
- Y D Fragoso
- Department of Molecular and Cell Biology, University of Aberdeen, Marischal College, U.K
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Abstract
Our group has previously reported significant changes in the incorporation of precursors into glycerophospholipids, particularly phosphatidylserine, in polymorphonuclear cells obtained from the peripheral blood of cluster headache patients, when compared with controls. The potential of these results led to further work using both the previous methodology and a modified isolation technique to obtain polymorphonuclear cells in as pure a state as possible. Neither the new results obtained using the original technique, nor the results with high purity polymorphonuclear cells from controls and cluster headache patients, confirm the marked changes in precursor uptake into glycerophospholipids originally reported.
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Affiliation(s)
- L R White
- Department of Neurology, Trondheim University Hospital, Norway
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24
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Fragoso YD, Skinner ER. The effect of 3-hydroxy 3-methylglutaryl-CoA reductase inhibitor on the subfractions of high-density lipoprotein of the rabbit. Biochem Soc Trans 1990; 18:1173-4. [PMID: 2088843 DOI: 10.1042/bst0181173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Y D Fragoso
- Department of Molecular and Cell Biology, University of Aberdeen, Scotland, U.K
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25
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Fragoso YD, Stovner LJ, Bjerve KS, Sjaastad O. Cluster headache: incorporation of (1-14C)oleic acid into phosphatidylserine in polymorphonuclear cells. Cephalalgia 1989; 9:207-11. [PMID: 2507162 DOI: 10.1046/j.1468-2982.1989.0903207.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
As recently demonstrated by our group, polymorphonuclear cells (PMNs) from cluster headache patients have an increased ability to incorporate arachidonic acid (AA) and L-serine into phosphatidylserine (PS). To evaluate whether there is an increased incorporation into PS also from fatty acids not involved in eicosanoid metabolism, PMNs from controls (n = 14) and cluster headache patients (n = 12) were incubated with (1-14C)oleic acid. After 1 h 2.7% +/- 1.1 (mean value +/- SD) of the glycerophospholipid radioactivity was found in PS in controls, whereas 4.2% +/- 1.2 was found in cluster headache patients (p less than 0.005). For phosphatidylcholine (PC) the corresponding figures were 74.2 +/- 5.4 in controls and 66.7 +/- 7.6 in cluster headache patients (p less than 0.01). The results suggest that the de novo biosynthesis of PS is increased and the biosynthesis of PC is decreased in cluster headache. The results may have an effect on the role of PS as an obligate protein kinase C activator.
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Affiliation(s)
- Y D Fragoso
- Department of Neurology, Trondheim University Hospital, Norway
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26
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Fragoso YD, Stovner LJ, Bjerve KS, Sjaastad O. Increased incorporation of L-(U-14C)serine into phosphatidylserine in polymorphonuclear cells from cluster headache patients. Cephalalgia 1989; 9:221-5. [PMID: 2507164 DOI: 10.1046/j.1468-2982.1989.0903221.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
It has recently been demonstrated by our group that polymorphonuclear cells (PMNs) from cluster headache patients incorporate more arachidonic acid (AA) into phosphatidylserine (PS) than PMNs from controls. In the present report, the incorporation of L-(U-14C)serine into PS in PMNs from 14 healthy volunteers and 12 cluster headache patients was studied. PMNs from controls incorporated 1194 +/- 578 (mean +/- SD) cpm of L-(U-14C)serine into PS, 268 +/- 292 cpm into phosphatidylethanolamine, and 57 +/- 71 cpm into sphingomyeline. The corresponding figures in cluster headache patients were 2365 +/- 841 cpm, 291 +/- 207 cpm, and 88 +/- 66 cpm, respectively. Incorporation of L-(U-14C)serine into PS was significantly increased (p less than 0.0004) in PMNs from cluster headache patients, whereas no significant difference was seen in other lipids. The results confirm that patients with cluster headache have an increased incorporation of precursors into PS in isolated PMNs, and they indicate that this is due to an increased de novo synthesis of PS.
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Affiliation(s)
- Y D Fragoso
- Department of Neurology, Trondheim University Hospital, Norway
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27
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Fragoso YD, Seim A, Stovner LJ, Mack M, Bjerve KS, Sjaastad O. Cluster headache: increased incorporation of (1-14C)arachidonic acid into phosphatidylserine in polymorphonuclear cells. Cephalalgia 1989; 9:213-20. [PMID: 2507163 DOI: 10.1046/j.1468-2982.1989.0903213.x] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Vasoactive metabolites deriving from arachidonic acid (AA) have been considered as putative mediators in the pathogenesis of various types of headache. In the present study we therefore compare the ability to synthesize AA containing precursor phospholipids in polymorphonuclear cells (PMNs) from healthy controls and cluster headache patients. 3.7% +/- 1.4 (mean +/- SD) of the (1-14C)AA incorporated into total PMN glycerophospholipids (GPLs) was recovered in the phosphatidylserine (PS) in a group of cluster headache patients (n = 12). This was almost twice the value of 1.9% +/- 0.8% found in a corresponding group of 24 healthy controls (p less than 0.001). A significant decrease in the incorporation of (1-14C)AA into phosphatidylcholine (PC) (p less than 0.01) and an increase in the incorporation of (1-14C)AA into phosphatidyletanolamine (PE) (p less than 0.05) were also found in cluster headache patients when compared to the control group. The increased incorporation of (1-14C)AA into PS in PMNs from this group of patients is interesting because PS plays an important role in the activation of protein kinase C, an enzyme involved in transmembrane signalling. The clinical implications of the present findings in cluster headache, if any, cannot yet be defined.
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Affiliation(s)
- Y D Fragoso
- Department of Neurology, Trondheim University Hospital, Norway
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28
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Abstract
Cluster headache periods (bouts) have, at the lower end of the scale, been supposed to last for periods as short as 1-2 weeks. Patients who usually have bouts of ordinary duration occasionally have brief attacks in the remission phase ("abortive attacks"). The group described here had a temporal pattern, clearly at variance with both these patterns: The six patients had mostly or entirely bouts of less than 1 week's duration. We have termed such short-lasting bouts minibouts, on the supposition that such cases belong within the cluster headache cycle. All the patients were men and had a history of unilateral headache without side shift, and usually the solitary attacks had some autonomic accompaniments, although of a moderate degree. In four cases only mild attacks occurred, whereas in two cases the attacks were rather severe and not consistent with full working ability. The group as such may not be homogeneous. The nosologic status of patients with bouts lasting only 1-2 days is somewhat uncertain. As long as the substrate of cluster headache is not outlined, the lower end of duration of minibouts cannot be accurately identified. The fact that three patients recently have experienced bouts of ordinary length strengthens the view that such cases really belong to the cluster headache cycle.
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Affiliation(s)
- O Sjaastad
- Department of Neurology, Regionsykehuset, Trondheim University Hospital, Norway
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29
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Abstract
Prostaglandins and leukotrienes have been implicated in the pathogenesis of various types of headache, mainly because some, but not all, cyclo-oxygenase inhibitors are effective in their treatment. We have therefore investigated whether a pathologically changed turnover of arachidonic acid (AA)-containing phospholipids can be seen in headache patients, using isolated polymorphonuclear cells (PMNs) from healthy controls and patients with chronic paroxysmal hemicrania (CPH) and cluster headache. PMNs from healthy controls incorporated 55% of the added (1-14C)AA into total lipids, and 0.5% +/- 0.14% of this radioactivity was found in the phosphatidylserine (PS) fraction. PMNs from a cluster headache and a CPH patient showed 300% and 900% increase in PS labeling from AA, respectively. No other phospholipids showed any difference between controls and patients. The results are discussed in connection with membrane signal transduction via the PS-dependent protein kinase C.
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Affiliation(s)
- Y D Fragoso
- Department of Neurology, University Hospital of Trondheim, Norway
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30
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Abstract
A 51-year-old male cluster headache patient had during five bouts in the course of 11 years always had the headache attacks on the left side. Autonomic abnormalities were, however, present on the right side. Pupillometrically, there was thus a Horner-like syndrome on the right (non-symptomatic) side, with miosis and a relatively more marked dilatation of that eye subsequent to topical application of a directly working sympathomimetic agent (phenylephrine) than after an indirectly working one (hydroxyamphetamine), whereas this was not the case on the symptomatic side. The findings on evaporimetry were not as clear-cut as the pupillometric findings; however, even facial sweating was consistent with a pathologic condition on the right (non-symptomatic) side. A primary dichotomy of pain and autonomic signs (that is, not due to change of side of pain localization) thus seems to be present in this case.
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Affiliation(s)
- O Sjaastad
- Department of Neurology, Regionsykehuset i Trondheim, Norway
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31
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Affiliation(s)
- O Sjaastad
- Department of Neurology, Regionsykhuset i Trondheim, Trondheim University Hospital, Norway
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32
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Sjaastad O, Saunte C, Fredriksen TA, de Souza Carvalho D, Fragoso YD, Dale LG, Hørven I. Cluster headache-like headache, Hageman trait deficiency, retrobulbar neuritis, and giant aneurysm. Autonomic function studies. Cephalalgia 1988; 8:111-20. [PMID: 3401913 DOI: 10.1046/j.1468-2982.1988.0802111.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [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: 01/05/2023]
Abstract
A 56-year-old, previously reported woman with cluster headache-like headache with bouts of unilateral (the side of predominance changing through the years) severe headache had a familial history (three generations) of partial Hageman factor deficiency and bleeding episodes. A giant aneurysm was found to be lodged in the anterior communicating artery on the left side. Clinically, the features were atypical for cluster headache: onset at a young age (14 years), episodes of retrobulbar neuritis appearing at the side of pain, etc. Studies of forehead sweating indicated that the right side was the pathologic one, from an autonomic point of view, as did pupillometric studies. However, during attacks, which were left-sided at the time, forehead sweating was marked laterally on the left side and on the upper eyelid, but not on the right. The "signal" usually reaching the autonomically stigmatized side during attacks of cluster headache, therefore, did not seem to reach the sweat glands on that (the right) side during the attack in the present case. This headache may, therefore, be distinct from cluster headache, both from a clinical and from an autonomic function point of view.
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Affiliation(s)
- O Sjaastad
- Department of Neurology, Regionsykehuset i Trondheim, Norway
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33
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Antonaci F, Sand T, Fragoso YD, Sjaastad O. Sweating patterns in humans: II. Heat-induced forehead sweating and cutaneous temperature in healthy individuals. Funct Neurol 1988; 3:217-24. [PMID: 3402819] [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: 01/05/2023]
Abstract
A comparison of heat-induced forehead sweating and cutaneous temperature patterns has been carried out in 17 healthy individuals (a total of 54 measurements). Only minor asymmetries in facial sweating and temperature were observed. No significant correlation between sweating and cutaneous temperature was found. The reproducibility of the method was excellent.
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Affiliation(s)
- F Antonaci
- Department of Neurology, Trondheim University Hospital, Norway
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34
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Abstract
The case of a 42-year-old woman with a 31-year history of continuous unilateral, pulsating headache with occasional exacerbations is described. Complete relief was obtained with 150 mg indomethacin daily.
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Affiliation(s)
- E Zukerman
- Department of Neurology, Escola Paulistad de Medicina, Sâo Paulo, Brazil
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