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Contreras I, Reiser KM, Martinez N, Giansante E, Lopez T, Suarez N, Postalian S, Molina M, Gonzalez F, Sanchez MR, Camejo M, Blanco MC. Effects of aspirin or basic amino acids on collagen cross-links and complications in NIDDM. Diabetes Care 1997; 20:832-5. [PMID: 9135951 DOI: 10.2337/diacare.20.5.832] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE To determine if long-term therapy with aspirin or basic amino acids for subjects with NIDDM reduces the severity of clinical complications and/or reduces tissue levels of markers of glycooxidative damage. RESEARCH DESIGN AND METHODS Subjects with NIDDM were administered either aspirin (100 mg/day) or a combination of basic amino acids consisting of L-arginine (2 g/day) plus L-lysine (0.5 g/day) for 1 year. The study was double-blind and placebo-controlled. The presence and severity of retinopathy, nephropathy, and neuropathy were assessed in all subjects at 4-month intervals, as were serum blood glucose, glycohemoglobin levels, and presence of albuminuria. Collagen cross-linking and collagen glycation were measured in skin collagen obtained by biopsy at the beginning and the end of the study. Skin biopsies were also obtained from age-matched control subjects. RESULTS Skin samples obtained from NIDDM subjects at the beginning of the study had significantly increased levels of glucitolyllysine, pentosidine, and hydroxypyridinium, as compared with age-matched control subjects. Pentosidine levels were significantly correlated with severity of retinopathy and neuropathy, but not nephropathy. Subjects receiving aspirin, but not amino acids or placebo, had significantly decreased levels of skin pentosidine after 1 year of therapy. CONCLUSIONS It is concluded that 1) low-dose aspirin may reduce glycooxidative damage in people with NIDDM, and 2) treatment may need to continue for more than 1 year before clinical status improves.
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Seyyed Ebrahimi SA, Williams AJ, Martinez N, Ataie A, Kianvash A, Ponton CB, Harris IR. Treatment of Strontium Hexaferrite Powder Synthesized Conventionally to Produce High Coercivity. ACTA ACUST UNITED AC 1997. [DOI: 10.1051/jp4:19971129] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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153
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Martinez N, Jimenez E, Castresana J, Schneider J. Detection of p53 mutations in gynecologic tumors by means of a simple, nonradioactive minigel method of PCR-SSCP analysis. Oncol Rep 1997; 4:359-61. [PMID: 21590059 DOI: 10.3892/or.4.2.359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We studied 22 gynecological tumors for mutations in exons 5 through 8 of the p53 gene by means of SSCP analysis, using a simplified, nonradioactive technique developed at our laboratory. In order to test the procedure, we carried it out in parallel with the usual radioactive one. Two coincident mutations (in exons 5 and 8) were found by means of both methods. However, an additional one in exon 6 was found by means of our nonradioactive technique. This simplified method for SSCP-analysis of the p53 gene in human tumors is faster, easier and cheaper to perform than the conventional radioactive method, and yields equivalent results. It could be thus an excellent candidate for routine use in the clinical setting.
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154
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Martinez N, Hauxwell J, Valiela I. Effect of Macroalgal Species and Nitrogen-Loading Rates on Colonization of Macroalgae by Herbivorous Amphipods. THE BIOLOGICAL BULLETIN 1995; 189:244-245. [PMID: 27768458 DOI: 10.1086/bblv189n2p244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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155
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Lozano JM, Steinhoff M, Ruiz JG, Mesa ML, Martinez N, Dussan B. Clinical predictors of acute radiological pneumonia and hypoxaemia at high altitude. Arch Dis Child 1994; 71:323-7. [PMID: 7979525 PMCID: PMC1030011 DOI: 10.1136/adc.71.4.323] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Fast breathing has been recommended as a predictor of childhood pneumonia. Children living at high altitude, however, may breathe faster in response to the lower oxygen partial pressure, which may change the accuracy of prediction of a high respiratory rate. To assess the usefulness of clinical manifestations in the diagnosis of radiological pneumonia or hypoxaemia, or both, at high altitude (2640 m above sea level), 200 children aged 7 days to 36 months presenting to an urban emergency room with cough lasting less than seven days were studied. Parents were interviewed and the children evaluated using standard forms. The results of chest radiographs and pulse oximetry obtained after clinical examination were interpreted blind. Radiological pneumonia and haemoglobin oxygen saturation < 88% were used as 'gold standards'. One hundred and thirty (65%) and 125 (63%) children had radiological pneumonia and hypoxaemia respectively. Crepitations and decreased breath sounds were statistically associated with pneumonia, and rapid breathing as perceived by the child's mother, chest retractions, nasal flaring, and crepitations with hypoxaemia. The best single predictor of the presence of pneumonia is a high respiratory rate, although the results are not as good as those reported by other studies. A respiratory rate > or = 50/minute had good sensitivity (76%) and specificity (71%) for hypoxaemia in infants. Hypoxaemia had a good sensitivity and specificity for pneumonia mainly in infants (83% and 73%, respectively). Logistic regression analysis showed that decreased or increased respiratory sounds and crepitations were associated with pneumonia, and that hypoxaemia is the best predictor when auscultatory findings are excluded. These results suggest that some clinical predictors appear to be less accurate in Bogota than in places at lower altitude, and that pulse oximetry can be used for predicting pneumonia.
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156
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Contreras I, Reiser KM, Martinez N, Giansante E, Lopez T, Suarez N, Postalian S, Molina M, Gonzalez-Mujica F, Sanchez MR. Pentosidine content in skin collagen from type II diabetic patients. Biochem Soc Trans 1994; 22:13S. [PMID: 8206207 DOI: 10.1042/bst022013s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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157
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Torres JR, de Marquez ML, Gonzalez A, Ramirez V, Martinez N, Lecuna V. [Comparative efficacy of intradermal and intramuscular active immunization against hepatitis B with a recombinant vaccine. Preliminary results]. G.E.N 1993; 47:145-9. [PMID: 8112550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Preliminary results of a prospective, comparative and randomized study on 119 sero-negative volunteers with increased risk to acquire hepatitis B, aimed to evaluate the comparative efficacy of a recombinant vaccine administered either intramuscularly or intradermally, are discussed. A short vaccination schedule of three consecutive doses given on months 0, 1 and 2 was used. Distribution by sex and age for both groups was similar. Seroconversion and seroprotection rates were comparable (96% and 96% Vs. 98% and 93%, respectively). The geometric mean titre of anti-HBsAg in individuals immunized via I.M. (155 IU/L) was significantly higher to that of the I.D. group (71 IU/L). On the other hand, the rate of good response (> 100 IU/L) was also higher in the I.M. group (67% Vs. 39%). The percentage of good responder in women was consistently higher than in men for both groups (75% Vs. 13%, respectively). In 68 vaccinees, samples were obtained one year later. The levels of anti-HBsAg and the anamnesic response after a booster of the vaccine are currently being assayed.
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158
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Martinez N. "I am a widow with five children. I also have AIDS.". NETWORK (RESEARCH TRIANGLE PARK, N.C.) 1993; 13:4. [PMID: 12344877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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159
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Cohen JE, Beaver RA, Cousins SH, DeAngelis DL, Goldwasser L, Heong KL, Holt RD, Kohn AJ, Lawton JH, Martinez N, O'Malley R, Page LM, Patten BC, Pimm SL, Polis GA, Rejmanek M, Schoener TW, Schoenly K, Sprules WG, Teal JM, Ulanowicz RE, Warren PH, Wilbur HM, Yodzis P. Improving Food Webs. Ecology 1993. [DOI: 10.2307/1939520] [Citation(s) in RCA: 193] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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160
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Calvo CF, Giannini SL, Martinez N, Birshtein BK. DNA sequences 3' of the Ig H chain cluster rearrange in mouse B cell lines. THE JOURNAL OF IMMUNOLOGY 1991. [DOI: 10.4049/jimmunol.146.4.1353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
A mouse myeloma cell line MPC11 (IgG2b, kappa) and variants derived from it have been used to study DNA rearrangements that occur at the Ig H chain locus. One variant, F5.5, has acquired both VH gene and C epsilon gene rearrangements. Through genomic Southern blot analysis initially directed to mapping the C epsilon gene rearrangement, we observed that the VH region rearrangement was linked, through an inversion event, to sequences that originate 3' of the CH cluster, i.e., 3' of the C alpha gene. Subsequent studies have shown that DNA rearrangements within the region 3' of the C alpha gene are detected in several other mouse myeloma and hybridoma cell lines and are not associated with the expression of specific isotypes.
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Calvo CF, Giannini SL, Martinez N, Birshtein BK. DNA sequences 3' of the Ig H chain cluster rearrange in mouse B cell lines. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 1991; 146:1353-60. [PMID: 1991972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A mouse myeloma cell line MPC11 (IgG2b, kappa) and variants derived from it have been used to study DNA rearrangements that occur at the Ig H chain locus. One variant, F5.5, has acquired both VH gene and C epsilon gene rearrangements. Through genomic Southern blot analysis initially directed to mapping the C epsilon gene rearrangement, we observed that the VH region rearrangement was linked, through an inversion event, to sequences that originate 3' of the CH cluster, i.e., 3' of the C alpha gene. Subsequent studies have shown that DNA rearrangements within the region 3' of the C alpha gene are detected in several other mouse myeloma and hybridoma cell lines and are not associated with the expression of specific isotypes.
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162
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Birshtein BK, Katzenberg DR, Weinreb A, Giannini S, Bard J, Calvo CF, Martinez N. Mechanism of class switching. Ann N Y Acad Sci 1988; 546:34-42. [PMID: 3073697 DOI: 10.1111/j.1749-6632.1988.tb21616.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We have documented the action of unequal sister chromatid exchange on antibody genes, and our studies provide the first molecular description of an unequal sister chromatid exchange event. We delineated the sequences that mediate class switch recombination in normal B cells through genomic Southern analysis of five IgG2-producing hybridomas. Successive subclass switching was documented in two of eight maps and may possibly account for interposed DNA in three additional maps, implying that subclass switching may be a relatively frequent occurrence in normal B cells. As in most other myelomas and hybridomas, the 5' breakpoint of switch recombination in our panel of hybridomas falls 5' to Cmu-associated tandem repeats, whereas the 3' breakpoint falls within C gamma-associated tandem repeats. We consider various hypotheses in the text, the most interesting of which is that deletion of Cmu-associated tandem repeats is a necessary first step before class switch recombination in mature B cells. This hypothesis suggests that Cmu-associated tandem repeats may be a separately regulated DNA element.
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Lemieux C, Bayardelle P, Cartier-Giroux J, Maltais R, Martinez N, Bouvier G, Mohr G. [Cerebral abscesses: clinical study]. L'UNION MEDICALE DU CANADA 1984; 113:405-8. [PMID: 6740800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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164
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Krumpe P, Weigt G, Martinez N, Marcum R, Cummiskey JM. Computerized rapid analysis of pulmonary function test: use of a least mean squares correlation for interpretation of data. Comput Biol Med 1982; 12:295-307. [PMID: 6759019 DOI: 10.1016/0010-4825(82)90033-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Although systems for automated calculation and interpretation of screening pulmonary function tests (PFT) have been discussed by previous investigators, these systems are often unavailable to other users, require large or hybrid computers, or are difficult to modify. The use of a branching decision tree for PFT interpretation may also limit the number of correlations possible and make revision of the program difficult because changes in the proximal branches of the tree require a rewriting of the entire distal program. We have developed a system based on a minicomputer which uses a least mean squares analysis for rapidly analyzing the patient's PFT data. This program considers the following types of PFT data singly and in combination: percentage predicted total lung capacity and/or alveolar volume, forced expiratory volume in one second to forced vital capacity ratio (before and after bronchodilator or 80% helium challenge), and percentage predicted single breath diffusing capacity for carbon monoxide. The interpretation program (IP) then selects the 'best interpretation' for the patient by computing the variance between the patient's data and data from a menu of over 120 interpretation statements. During the past two years we have used this system for screening over 3000 patients. In about 90% of patients the computer selected interpretation statements which were acceptable to a sub-specialty pulmonary physician. The use of this IP for screening purposes has facilitated the efficient use of laboratory personnel and equipment.
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165
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Fung CH, Gonzalez-Crussi F, Yonan TN, Martinez N. 'Rhabdoid' Wilms' tumor: an ultrastructural study. Arch Pathol Lab Med 1981; 105:521-3. [PMID: 6269516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We studied a 5-week-old infant who had a "rhabdoid" Wilms' tumor. Ultrastructural studies disclosed aggregates of cytoplasmic filaments that seemed to correspond with the eosinophilic cytoplasmic bodies seen by light microscopy, but did not uncover evidence of rhabdomyoblastic differentiation. The histogenesis of this subtype was not established, but origin from the metanephric blastema could not be ruled out.
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166
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Abstract
The hypochondriacal attitudes of 53 aged community residents were studied. No significant correlations were found with situational stress, sex, or ethnicity (English-speaking vs Spanish-speaking). The levels of hypochondriasis appeared to be inversely related to self-evaluation of memory ability. There was no indication of an inherent iatrogenic effect. It was concluded that hypochondriacal behavior is chiefly a function of the underlying personality, which may influence the perception of events as stressful.
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Fung CH, Yonan TN, Lo JW, Martinez N. Vascular spaces in endolymphatic stromal myosis. Gynecol Oncol 1980; 10:241-7. [PMID: 7461490 DOI: 10.1016/0090-8258(80)90088-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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168
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Guarner V, Martinez N, Gaviño JF. Ten year evaluation of posterior fundoplasty in the treatment of gastroesophageal reflux: long-term and comparative study of 135 patients. Am J Surg 1980; 139:200-3. [PMID: 7356103 DOI: 10.1016/0002-9610(80)90254-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Results over a 5 to 10 year period in 135 patients with hiatal hernia treated surgically by posterior fundoplasty were compared with results in a similar group of 40 patients undergoing Nissen fundoplication. The final results demonstrate the effectiveness of both procedures to relieve gastroesophageal reflux. However, the collateral effects with posterior fundoplasty are considerably less than those with the Nissen fundoplication. The lower esophageal sphincter was longer with fundoplasty than with the Nissen procedure.
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169
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Krumpe PE, Finley TN, Martinez N. The search for expiratory obstruction in meat wrappers studied on the job. THE AMERICAN REVIEW OF RESPIRATORY DISEASE 1979; 119:611-8. [PMID: 443631 DOI: 10.1164/arrd.1979.119.4.611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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170
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Abstract
A case of cystadenoma of the pancreas was studied at the light (LM) and the ultrastructural (EM) levels. The observation made under LM that the flattened epithelial cells lining the cystic spaces were similar to the centroacinar cells of a normal pancreas was supported by EM findings. Numerous glycogen granules were demonstrated in the cells, a feature characteristic of fetal but not adult centroacinar cells. A few epithelial cells contained occasional membrane bound dense granules of unknown nature. This observation and the finding of normally appearing islets of Langerhans raise the possibility that this may be an example of a mixed insular-duct cystadenoma. However, if the islets of Langerhans were considered entrapped structures, this tumor should be labelled as a simple serous cystadenoma.
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171
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Martinez N. George W. Changus 1912-1976. THE PROCEEDINGS OF THE INSTITUTE OF MEDICINE OF CHICAGO 1976; 31:77. [PMID: 798186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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172
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Martinez N, Sliman N, Papineau LJ. [Post-discoidectomy meningeal keloid]. LA TUNISIE MEDICALE 1974; 52:75-80. [PMID: 4439503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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173
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174
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Martinez N, Sliman S, Papineau LJ. [Post-discoidectomy meningeal keloid]. L'UNION MEDICALE DU CANADA 1973; 102:2104-8. [PMID: 4792869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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175
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Martinez N. [Ophthalmologic manifestations of cranial injuries, apropos of 2 cases of posttraumatic bitemporal hemianopsia]. Neurochirurgie 1973; 19:303-7. [PMID: 4803037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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