1
|
Colón Pérez J, Villarino Fernández RA, Domínguez Lago A, Treviño Castellano MM, Pérez del Molino Bernal ML, Sánchez Poza S, Torres-Sangiao E. Addressing Sexually Transmitted Infections Due to Neisseria gonorrhoeae in the Present and Future. Microorganisms 2024; 12:884. [PMID: 38792714 PMCID: PMC11124187 DOI: 10.3390/microorganisms12050884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/16/2024] [Accepted: 04/22/2024] [Indexed: 05/26/2024] Open
Abstract
It was in the 1800s when the first public publications about the infection and treatment of gonorrhoea were released. However, the first prevention programmes were only published a hundred years later. In the 1940s, the concept of vaccination was introduced into clinical prevention programmes to address early sulphonamide resistance. Since then, tons of publications on Neisseria gonorrhoeae are undisputed, around 30,000 publications today. Currently, the situation seems to be just as it was in the last century, nothing has changed or improved. So, what are we doing wrong? And more importantly, what might we do? The review presented here aims to review the current situation regarding the resistance mechanisms, prevention programmes, treatments, and vaccines, with the challenge of better understanding this special pathogen. The authors have reviewed the last five years of advancements, knowledge, and perspectives for addressing the Neisseria gonorrhoeae issue, focusing on new therapeutic alternatives.
Collapse
|
2
|
Sylva D, Tamayo L, Mosquera-Klinger G, Carvajal JJ, Pérez JC. Eosinophilic gastroenteritis: An unusual presentation of a rare disease. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2019; 84:116-118. [PMID: 29555104 DOI: 10.1016/j.rgmx.2018.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 12/19/2017] [Accepted: 01/25/2018] [Indexed: 06/08/2023]
|
3
|
Medina N, Samayoa B, Lau-Bonilla D, Denning DW, Herrera R, Mercado D, Guzmán B, Pérez JC, Arathoon E. Burden of serious fungal infections in Guatemala. Eur J Clin Microbiol Infect Dis 2017; 36:965-969. [PMID: 28243758 DOI: 10.1007/s10096-017-2920-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 12/21/2016] [Indexed: 10/20/2022]
Abstract
Guatemala is a developing country in Central America with a high burden of HIV and endemic fungal infections; we attempted to estimate the burden of serious fungal infections for the country. A full literature search was done to identify epidemiology papers reporting fungal infections from Guatemala. We used specific populations at risk and fungal infection frequencies in the population to estimate national rates. The population of Guatemala in 2013 was 15.4 million; 40% were younger than 15 and 6.2% older than 60. There are an estimated 53,000 adults with HIV infection, in 2015, most presenting late. The estimated cases of opportunistic fungal infections were: 705 cases of disseminated histoplasmosis, 408 cases of cryptococcal meningitis, 816 cases of Pneumocystis pneumonia, 16,695 cases of oral candidiasis, and 4,505 cases of esophageal candidiasis. In the general population, an estimated 5,568 adult asthmatics have allergic bronchopulmonary aspergillosis (ABPA) based on a 2.42% prevalence of asthma and a 2.5% ABPA proportion. Amongst 2,452 pulmonary tuberculosis patients, we estimated a prevalence of 495 for chronic pulmonary aspergillosis in this group, and 1,484 for all conditions. An estimated 232,357 cases of recurrent vulvovaginal candidiasis is likely. Overall, 1.7% of the population are affected by these conditions. The true fungal infection burden in Guatemala is unknown. Tools and training for improved diagnosis are needed. Additional research on prevalence is needed to employ public health measures towards treatment and improving the reported data of fungal diseases.
Collapse
|
4
|
Ramírez I, Nieto-Ríos JF, Ocampo-Kohn C, Aristizábal-Alzate A, Zuluaga-Valencia G, Muñoz Maya O, Pérez JC. Protothecal bursitis after simultaneous kidney/liver transplantation: a case report and review. Transpl Infect Dis 2016; 18:266-74. [PMID: 26779785 DOI: 10.1111/tid.12496] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 09/16/2015] [Accepted: 11/01/2015] [Indexed: 01/18/2023]
Abstract
Solid organ transplantation is an accepted therapy for end-stage diseases of the kidneys, liver, heart, and lungs. Unfortunately, transplantation is associated with infectious complications. Here, we present a case report of Prototheca wickerhamii olecranon bursitis and review all of the cases in solid organ transplant (SOT) recipients published in the literature to date. In our patient, the infection resolved with surgical therapy and limited antifungal therapy, and no symptoms have recurred over 24 months of follow-up. A review of the literature suggests that 50% of SOT recipients with Prototheca infection present with disseminated infection, and the overall mortality is 75%. More studies are required to determine the optimal management of protothecosis in this population.
Collapse
|
5
|
Masías VH, Krause M, Valdés N, Pérez JC, Laengle S. Using decision trees to characterize verbal communication during change and stuck episodes in the therapeutic process. Front Psychol 2015; 6:379. [PMID: 25914657 PMCID: PMC4391223 DOI: 10.3389/fpsyg.2015.00379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 03/17/2015] [Indexed: 11/13/2022] Open
Abstract
Methods are needed for creating models to characterize verbal communication between therapists and their patients that are suitable for teaching purposes without losing analytical potential. A technique meeting these twin requirements is proposed that uses decision trees to identify both change and stuck episodes in therapist-patient communication. Three decision tree algorithms (C4.5, NBTree, and REPTree) are applied to the problem of characterizing verbal responses into change and stuck episodes in the therapeutic process. The data for the problem is derived from a corpus of 8 successful individual therapy sessions with 1760 speaking turns in a psychodynamic context. The decision tree model that performed best was generated by the C4.5 algorithm. It delivered 15 rules characterizing the verbal communication in the two types of episodes. Decision trees are a promising technique for analyzing verbal communication during significant therapy events and have much potential for use in teaching practice on changes in therapeutic communication. The development of pedagogical methods using decision trees can support the transmission of academic knowledge to therapeutic practice.
Collapse
|
6
|
Espinàs J, Vilaseca J, Castro JA, Ibáñez F, Lorenzo A, Alonso R, Corredera A, Daza P, Eirea C, Fluixá C, García G, González MJ, Martín-Carrillo P, Martínez M, Olmos O, Pérez JC, Puig B, Ramos D, Sempere G. Una asignatura pendiente. Aten Primaria 2006; 37:67-8. [PMID: 16527110 PMCID: PMC7669194 DOI: 10.1157/13084487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
7
|
Vilaseca J, Espinàs J, Fluixà C, Ibáñez F, Alonso R, Castro JA, Corredera A, Daza P, de la Figuera E, Eirea C, García G, González MJ, Lorenzo A, Martín-Carrillo P, Martínez M, Olmos O, Pérez JC, Puig B, Ramos D, Rodríguez JC, Sempere G, Diogène E, Rodríguez D. [Therapeutic guide to primary care based on the evidence, 2nd edition: an honest and practical work]. Aten Primaria 2004; 34:515-7. [PMID: 15607051 PMCID: PMC7676068 DOI: 10.1016/s0212-6567(04)70854-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
8
|
Vilaseca J, Espinàs J, Fluixà C, Ibáñez F, Alonso R, Castro JA, Corredera A, Daza P, de la Figuera E, Eirea C, García G, González MJ, Lorenzo A, Martín-Carrillo P, Martínez M, Olmos O, Pérez JC, Puig B, Ramos D, Rodríguez JC, Sempere G, Diogène E, Rodríguez D. Guía terapéutica en atención primaria basada en la evidencia, 2.ª edición: una obra honesta y práctica. Aten Primaria 2004. [DOI: 10.1157/13069571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
9
|
Perez JC, McKeller MR, Pérez JC, Sánchez EE, Ramírez MS. An internet database of crotaline venom found in the United States. Toxicon 2001; 39:621-32. [PMID: 11072040 DOI: 10.1016/s0041-0101(00)00186-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Many snake venoms have been shown to be complex mixtures of pharmacologically important molecules, some of which have potential therapeutic value in the treatment of clot-induced ischemia, cancer and other human disorders. The literature contains many references on how venom and/or venom components are being used in medicine. Within the United States, there are 44 subspecies of poisonous snakes. Despite this rather vast diversity, 90% of the venom-related biomedical research conducted on native snakes found in the United States has been done on a limited number of the more common species. Since the venoms from most of the native species are not available or characterized, their composition and potential usefulness in medicine and applied biomedical research has not been explored. The Natural Toxins Research Center (NTRC) at Texas A&M University-Kingsville has developed a serpentarium that presently houses a population of over 250 snakes composed of 11 species and 20 subspecies. These snakes are cataloged on the Internet database along with their geographical location data, proteolytic activities, high performance liquid chromatography (HPLC) and electrophoretic titration (ET) profiles. Many of these snake venoms have never been characterized and few locale-specific differences within a species have been examined. These venoms can be queried through an on-line search routine. The database will be a useful starting point for anyone interested in isolating fibrinolytic enzymes, specific toxins, hemorrhagins, or other pharmacologically active proteins from snake venoms.
Collapse
|
10
|
Sánchez EE, Soliz LA, Ramírez MS, Pérez JC. Partial characterization of a basic protein from Crotalus molossus molossus (northern blacktail rattlesnake) venom and production of a monoclonal antibody. Toxicon 2001; 39:523-37. [PMID: 11024493 DOI: 10.1016/s0041-0101(00)00165-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The venom of Crotalus molossus molossus (blacktailed rattlesnake) is very basic compared to that of other Crotalinae venoms. Unlike other Crotalinae venoms that are separated by anion exchange chromatography, C. m. molossus venom must be fractionated by cation exchange chromatography. Electrophoretic titration (ET) was used to predict the isoelectric point (pI) and optimal conditions for isolation. The specific hemorrhagic activity for C. m. molossus venom was 7.5 mm/microg, making it one of the most hemorrhagic of Crotalinae venoms. Basic hemorrhagic and fibrinolytic proteins from the venom of C. m. molossus venom were further fractionated by cation exchange chromatography. A basic fibrinolytic/hemorrhagic protein (CMM4) was isolated. CMM4 has a molecular weight between 23 and 26 kDa and a pI of approximately 11.3. SDS electrophoresis revealed one band and ET curve revealed 3 bands with very similar surface charges at all pH. CMM4 did not activate plasminogen when tested with a Chrom Z-PLG assay. The proteins in CMM4 had similar N-terminal amino acid sequences to each other (D-Q-Q-N-L-P-Q-(S/A/R)-Y-(V/R/I)-E-L-V-V-V-A-D-H-R-L-F-M-K-Y-K-S-D-L- N-T). The differences in these proteins are in positions 8 and 10. CMM4 may contain isoforms that differ by minor sequence variations at their amino-termini. The amino acid sequences of CMM4 were very similar to other fibrinolytic and hemorrhagic metalloproteinases isolated from venoms of the genera Crotalus. The specific hemorrhagic activity of CMM4 decreased as the specific fibrinolytic activity increased. A monoclonal antibody (CMM1b) was produced against C. m. molossus venom that neutralized the hemorrhagic activity of some of its fractions. CMM1b also reacted with 11 of 29 venom samples tested via ELISA.
Collapse
|
11
|
Paz-y-Miño C, Pérez JC, Dávalos V, Sánchez ME, Leone PE. Telomeric associations in cigarette smokers exposed to low levels of X-rays. Mutat Res 2001; 490:77-80. [PMID: 11152974 DOI: 10.1016/s1383-5718(00)00156-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Telomeric association (TA), i.e. fusion of chromosomes by their telomeres, predisposes a cell to genetic instability. Because of this we investigated the effect of X-rays exposure and cigarette smoking on the frequency of TA in peripheral blood lymphocytes of exposed individuals, in order to determine if TA can be a chromosomal marker in populations exposed to these carcinogens and if there is an synergistic effect between both agents. We found that the exposed groups show a greater percentage of TA when compared with the control group (P<0.001). However, although the percentage of metaphases with TA in the group with combined exposure (12.6%) was greater than in the others exposed groups (P<0.05), this value was less than the sum of the two individual effects (15.1%). Our results suggest that probably there is not an additive or synergistic effect between X-rays and smoking, and that TA may be a useful cytogenetic marker for evaluating populations exposed to mutagens.
Collapse
|
12
|
Añón JM, Gómez V, Escuela MP, De Paz V, Solana LF, De La Casa RM, Pérez JC, Zeballos E, Navarro L. Percutaneous tracheostomy: comparison of Ciaglia and Griggs techniques. Crit Care 2000; 4:124-8. [PMID: 11056749 PMCID: PMC29040 DOI: 10.1186/cc667] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/1999] [Revised: 01/29/2000] [Accepted: 02/14/2000] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Although the standard tracheostomy described in 1909 by Jackson has been extensively used in critical patients, a more simple procedure that can be performed at the bedside is needed. Since 1957 several different types of percutaneous tracheostomy technique have been described. The purpose of the present study was to compare two bedside percutaneous tracheostomy techniques: percutaneous dilatational tracheostomy (PDT) and the guidewire dilating forceps (GWDF). MATERIALS AND METHODS A prospective study in two medical/surgical intensive care units (ICUs) was carried out. Sixty-three critically ill patients who required endotracheal intubation for longer than 15 days were consecutively selected to undergo PDT (25 patients) or GWDF (38 patients) technique. Intraoperative and postoperative complications were recorded. RESULTS Age (mean +/- standard error) was 63 +/- 1.1 years. The patients had been mechanically ventilated for an average of 19.8 +/- 1.2 days. The GWDF technique was significantly faster than PDT technique (P = 0.02). Fifteen complications occurred in 10 out of 63 (15%) patients. They were as follows: tracheal tear (one patient in each group; in one case this was due to false passage); transient hypotension (one patient in the PDT group and two patients in the GWDF group); atelectasis (one patient in the PDT group); and haemorrhage (one patient in the PDT group and three patients in the GWDF group). In both patients with tracheal tear, reduced arterial oxygen saturation (SaO2) with concomitant subcutaneous emphysema ensued. CONCLUSION We found no statistical differences between complications with both techniques. The surgical time required for the GWDF technique was less than that for PDT.
Collapse
|
13
|
Abstract
There are few reports about the incidence of the DeltaF508 mutation in Latin American countries. We show the study of the DeltaF508 mutation and the seven most common "European" mutations in 10 Ecuadorian CF affecteds. The incidence of DeltaF508 mutation found was 25% and none of the other seven was detected in our population, which indicates that at least 60% of the mutations in the studied population are different from most common in Europe. Similar data have been reported in other Amerindian populations, therefore it is suggested that Cystic Fibrosis in Ecuador-and other Amerindian countries in Latin America-have a different ethiology than that of Caucasian populations.
Collapse
|
14
|
Ramírez MS, Sánchez EE, García-Prieto C, Pérez JC, Chapa GR, McKeller MR, Ramírez R, De Anda Y. Screening for fibrinolytic activity in eight Viperid venoms. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART C, PHARMACOLOGY, TOXICOLOGY & ENDOCRINOLOGY 1999; 124:91-8. [PMID: 10579653 DOI: 10.1016/s0742-8413(99)00056-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Snake venoms contain direct-acting fibrinolytic metalloproteinases (MMP) that could have important applications in medicine. Fibrinolytic enzymes isolated from venom can induce in vitro clot lysis by directly acting on a fibrin clot. The most ideal fibrinolytic enzyme would have high affinity for clots, dissolve clots directly without causing hemorrhage, and would not be neutralized in vivo by endogenous metalloproteinase inhibitors. The purpose of this study was to compare DEAE/HPLC venom profiles from Viperid snakes and identify fractions that contain fibrinolytic activity with no hemorrhagic activity and are not neutralized by animal sera. The sera selected were from four (Virginia opossum, Gray woodrat, Mexican ground squirrel, and Hispid cottonrat) animals known to neutralize hemorrhagic activity in snake venoms. Nineteen fractions from the Viperid venoms had fibrinolytic activity. Agkistrodon venom fractions contained the highest specific fibrinolytic activities. A. piscivorus leucostoma fraction 4 contained a high specific fibrinolytic activity, no hemorrhagic activity, and the fibrinolytic activity was not neutralized by the proteinase inhibitors of the four animal sera. A. contortrix laticinctus fraction 1 also had a high specific fibrinolytic activity and no hemorrhagic activity. However, the fibrinolytic activity was neutralized by Didelphis virginiana (Virginia opossum) serum.
Collapse
|
15
|
Martinez RR, Pérez JC, Sánchez EE, Campos R. The antihemorrhagic factor of the Mexican ground squirrel, (Spermophilus mexicanus). Toxicon 1999; 37:949-54. [PMID: 10340834 DOI: 10.1016/s0041-0101(98)00207-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The Mexican ground squirrel (Spermophilus mexicanus) has a natural resistance to western diamondback rattlesnake venom (Crotalus atrox). The LD50 for the Mexican ground squirrel is 53 mg/kg body weight, which is 13 times higher than that of BALB/c mice. An antihemorrhagic factor from serum of the Mexican ground squirrel was isolated using Sephadex G-200 gel filtration, ion exchange A-50, G-75 gel filtration and HPLC DEAE 5PW ion exchange chromatography. The purified factor neutralized proteolytic and hemorrhagic activity of crude C. atrox venom. The results of this research suggest that the antihemorrhagic factor in the serum of the Mexican ground squirrel is not an antibody and neutralizes hemorrhagic activity of C. atrox venom.
Collapse
|
16
|
Pérez JC, Sánchez EE. Natural protease inhibitors to hemorrhagins in snake venoms and their potential use in medicine. Toxicon 1999; 37:703-28. [PMID: 10219984 DOI: 10.1016/s0041-0101(98)00205-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Snake venoms are complex mixtures of many toxins and enzymes which effectively immobilize prey without a struggle and assist in digestion. Certain animals have a remarkable resistance to envenomation of snakes. Naturally occurring factors that neutralize snake venoms have been found in the sera of most snakes and a few warm-blooded animals. These antihemorrhagic and antineurotoxic factors have been purified from snake and mammalian sera. The antihemorrhagins are not immunoglobulins since they have different physical and chemical characteristics. The natural immunity to hemorrhagins is the result of tissue inhibitors of metalloproteinases (TIMP) found in animal sera of resistant animals. Most animals have matrix metalloproteinases (MMP) and TIMP that are implicated in a wide variety of normal physiological processes and pathological conditions. MMP in animals have many biological functions in embryogenesis, morphogenesis and tissue remodeling. MMP activities are precisely regulated by endogenous TIMP. Disruption of the balance between MMP and TIMP causes various diseases such as arthritis, periodontal diseases, diabetes, ophthalmologic conditions, neoplasia, metabolic bone disease, atherosclerosis and orthopedic conditions. Resistant animals that have a high titer of TIMP would have a survival advantage when bitten by poisonous snakes. Snake venoms are abundant and stable sources of MMP which are medically important. The venom MMP which cause unregulated destruction of tissue have sequences which have some degree of homology with mammalian MMP which control normal biological processes. Resistant animals are important sources of TIMP which can be used to study metalloproteinase related diseases. For these reasons the MMP in snakes and TIMP in resistant animal are excellent candidates for developing new drug therapies.
Collapse
|
17
|
Sánchez EE, García C, Pérez JC, De La Zerda SJ. The detection of hemorrhagic proteins in snake venoms using monoclonal antibodies against Virginia opossum (Didelphis virginiana) serum. Toxicon 1998; 36:1451-9. [PMID: 9723843 DOI: 10.1016/s0041-0101(98)00087-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Most snakes and a few warm-blooded animals have a resistance to snake venoms because of naturally occurring antihemorrhagins found in their sera. The antihemorrhagins in serum of Virginia opossum (Didelphis virginiana) neutralize hemorrhagic activity by binding to hemorrhagins in snake venoms. The binding characteristic of antihemorrhagins in D. virginiana serum was used to develop a five-step western blot. The detection of hemorrhagic proteins were measured indirectly with antihemorrhagins in Virginia opossum serum and with DV-2LD#2, a monoclonal antibody specific for Virginia opossum antihemorrhagins. Snake venoms were separated by native-PAGE, transferred to a Millipore Immobilon-P membrane and then incubated with crude Virginia opossum serum. The hemorrhagins in snake venom bind to antihemorrhagins in Virginia opossum serum which react with DV-2LD#2 a monoclonal antibody that is specific for Virginia opossum antihemorrhagins. DV-2LD#2 monoclonal antibody inhibits antihemorrhagic activity in Virginia opossum serum when mixed in equal amounts. The inhibition of antihemorrhagins by DV-2LD#2 monoclonal antibody suggests specificity. DV-2LD#2 monoclonal antibody does not recognize antihemorrhagins in gray woodrat (Neotoma micropus) serum. The five-step western blot reveals two well-defined bands which represent hemorrhagins found in Western diamondback rattlesnake (Crotalus atrox) venom. Venoms from 15 different snake species were examined to determine the usefulness of the five-step western blot. Other hemorrhagic venoms (Great Basin rattlesnake (C. viridis lutosus), Prairie rattlesnake (C. viridis viridis), Tancitaran dusky rattlesnake (C. pusillus), Northern Mojave rattlesnake (C. scutulatus scutulatus type B) and Northern Pacific rattlesnake (C. v. oreganus)) had one single band in the five-step western blot. DV-2LD#2 did not bind to the non-hemorrhagic venoms and reacted with 50% of the hemorrhagic venoms used in this study. The monoclonal antibody, CAH, reacted with all the hemorrhagic venoms except for the venom of the King cobra (Ophiophagus hannah) and did not react with the non-hemorrhagic venoms. The hemorrhagic binding site of CAH monoclonal antibody and the antihemorrhagin in Virginia opossum are different binding sites. The five-step western blot will be a very useful assay for determining hemorrhagic activity without using live animals.
Collapse
|
18
|
Velasco R, Padilla E, Pérez JC, Ruiz-Torres A. Lipoprotein profiles and their relation to animal fat intake in healthy old people from four Spanish localities. Arch Gerontol Geriatr 1989; 9:97-105. [PMID: 2589920 DOI: 10.1016/0167-4943(89)90030-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/1987] [Revised: 08/15/1988] [Accepted: 03/11/1989] [Indexed: 01/01/2023]
Abstract
In studies carried out on 401 individuals from different Spanish regions, blood lipoprotein levels do not show a clear relationship to amounts of animal fat intake because diet habits change in old age. But in these persons there was a significant and positive correlation between actual LDL levels and animal fat intake when they were 40-45 years old. Similar results are obtained with HDL, but correlations are inversely proportional. Our study leads to the interpretation that diet habits during the first phase of the adult life span are determinant for the lipoprotein profiles in older ages, which can still be observed in very old individuals.
Collapse
|
19
|
Portela A, Pérez RJ, Nallar R, Pérez JC, Stewart P, Vincente JA, Lonchampt P. Denervation effects on choline depolarization of muscle membrane. EXPERIENTIA 1969; 25:143-4. [PMID: 5786082 DOI: 10.1007/bf01899087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
20
|
Portela A, Pérez JC, Luchelli M, Stewart PA, Hajduk T, Parisi M, Garrison A. Potassium and cesium effects on sodium efflux and oxygen consumption of muscle cells. BIOCHIMICA ET BIOPHYSICA ACTA 1965; 109:495-502. [PMID: 5867549 DOI: 10.1016/0926-6585(65)90174-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|