1
|
Uusitalo A, Tikkakoski A, Lehtinen P, Ylänen K, Poutanen T, Korhonen PH. Heart rate in newborns is associated with age, sex and maternal levothyroxine therapy. Acta Paediatr 2024; 113:973-979. [PMID: 38305638 DOI: 10.1111/apa.17140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 01/24/2024] [Indexed: 02/03/2024]
Abstract
AIM To evaluate the definition and causes of neonatal bradycardias. METHODS This retrospective study included 135 term-born newborns referred for 24-hour Holter monitoring due to bradycardia. Bradycardia was defined as either a heart rate below 80 beats per minute (standard definition) or a heart rate below our recently published age-specific reference values for neonatal heart rate. RESULTS The mean (SD) age was 6.1 (1.3) days. With standard definition, 107 newborns (79%) had bradycardia, whereas only 20 (15%) had a minimum heart rate lower than the age-specific reference. Younger newborns had lower heart rates. Each day increased the minimum, mean and maximum heart rate by 1.8 (95% CI: 1.0, 2.6), 4.2 (95% CI: 3.0, 5.3) and 2.1 beats per minute (95% CI: 0.3, 3.8), respectively. Male sex and maternal levothyroxine medication were negatively associated with the mean and maximum heart rate. None of the newborns had a cardiac cause for low heart rate. CONCLUSION Among term newborns with bradycardias, younger age, male sex and maternal levothyroxine medication were associated with a lower heart rate on Holter monitoring. Given the age-related increase in heart rate, the 80 beats per minute limit as a universal threshold for abnormal heart rate in newborns appears inappropriate.
Collapse
Affiliation(s)
- Asta Uusitalo
- Department of Pediatrics, Tampere University Hospital, Tampere, Finland
- Tampere Center for Child, Adolescent and Maternal Health Research, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Antti Tikkakoski
- Department of Clinical Physiology and Nuclear Medicine, Tampere University Hospital, Tampere, Finland
| | - Pieta Lehtinen
- Department of Clinical Physiology and Nuclear Medicine, Tampere University Hospital, Tampere, Finland
| | - Kaisa Ylänen
- Department of Pediatrics, Tampere University Hospital, Tampere, Finland
- Tampere Center for Child, Adolescent and Maternal Health Research, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Tuija Poutanen
- Department of Pediatrics, Tampere University Hospital, Tampere, Finland
- Tampere Center for Child, Adolescent and Maternal Health Research, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Päivi H Korhonen
- Department of Pediatrics, Tampere University Hospital, Tampere, Finland
- Tampere Center for Child, Adolescent and Maternal Health Research, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| |
Collapse
|
2
|
Uusitalo A, Tikkakoski A, Reinikainen M, Lehtinen P, Ylänen K, Korhonen P, Poutanen T. Extrasystoles or short bradycardias of the newborn seldom require subsequent 24-hour electrocardiographic monitoring. Acta Paediatr 2022; 111:979-984. [PMID: 35100437 PMCID: PMC10138749 DOI: 10.1111/apa.16259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 12/28/2021] [Accepted: 01/17/2022] [Indexed: 11/29/2022]
Abstract
AIM To retrospectively assess the indications for and findings on 24-hour electrocardiographic (Holter) monitoring in newborns, focussing on bradycardias and extrasystoles. METHODS Data included 337 term-born infants. Holter indications were categorised into bradycardias below 80 beats per minute, extrasystoles, any tachycardia and other. Heart rate below 60 beats per minute, pathological atrioventricular conduction, supraventricular or ventricular tachycardia, or either atrial premature contractions over 10% or ventricular premature contractions over 5% of total beats were defined as significant arrhythmia on Holter. RESULTS The median age was 6 days (range: 2-62 days). Bradycardia (42%) or extrasystoles (32%) were the most common Holter indications. Fifty-three infants (16%) had significant arrhythmia on Holter. Heart disease or 12-lead electrocardiogram expressing extrasystoles or conduction abnormalities were associated with significant arrhythmias (p = 0.046 and p < 0.001, respectively). Twenty-seven of 109 infants (25%) with extrasystoles as a Holter indication had abnormal Holter results, but only seven (6.4%) had significant arrhythmia on Holter if the 12-lead electrocardiogram was normal. No pathology was found behind bradycardias below 80 beats per minute in the absence of heart disease. CONCLUSION Among term newborns with extrasystoles or bradycardias, Holter monitoring could be targeted to infants with heart disease or abnormal electrocardiograms.
Collapse
Affiliation(s)
- Asta Uusitalo
- Department of Paediatrics Tampere University Hospital Tampere Finland
- Tampere Center for Child, Adolescent and Maternal Health Research Faculty of Medicine and Health Technology Tampere University Tampere Finland
| | - Antti Tikkakoski
- Department of Clinical Physiology and Nuclear Medicine Tampere University Hospital Tampere Finland
| | - Miika Reinikainen
- Faculty of Medicine and Health Technology Tampere University Tampere Finland
| | - Pieta Lehtinen
- Department of Clinical Physiology and Nuclear Medicine Tampere University Hospital Tampere Finland
| | - Kaisa Ylänen
- Department of Paediatrics Tampere University Hospital Tampere Finland
- Tampere Center for Child, Adolescent and Maternal Health Research Faculty of Medicine and Health Technology Tampere University Tampere Finland
| | - Päivi Korhonen
- Department of Paediatrics Tampere University Hospital Tampere Finland
- Tampere Center for Child, Adolescent and Maternal Health Research Faculty of Medicine and Health Technology Tampere University Tampere Finland
| | - Tuija Poutanen
- Department of Paediatrics Tampere University Hospital Tampere Finland
- Tampere Center for Child, Adolescent and Maternal Health Research Faculty of Medicine and Health Technology Tampere University Tampere Finland
| |
Collapse
|
3
|
Kanerva M, Ollgren J, Lyytikainen O, Agthe N, Mottonen T, Kauppinen M, Laurila K, Suomalainen P, Vuorela R, Ryhta I, Vastamaki R, Helen M, Hietaniemi K, Varis T, Eliin L, Nieminen J, Skogberg K, Salminen R, Yrjonsalo ML, Kimmo AM, Sandberg K, Tuppurainen T, Mattila K, Aalto A, Anttila VJ, Estlander C, Hamalainen M, Jalkanen M, Kanerva M, Kuutamo T, Lappalainen T, Mattila P, Pipping D, Ratia M, Sammalkorpi K, Simons L, Tommila P, Totterman I, Lehtinen P, Torvinen S, Eklund M, Fellman M, Mikkola J, Haapaniemi L, Junka A, Jakobsson A, Leppaaho-Lakka J, Patsi S, Rummukainen M, Tiitinen T, Liikka M, Hamalainen S, Koivula I, Rissanen AM, Ruotsalainen E, Terasvirta H, Hannola K, Marttinen T, Palosara J, Pietikainen R, Kaukoniemi U, Nurkkala-Pitko T, Broas M, Isojarvi J, Jagerroos H, Jankala E, Niemi P, Poyry S, Raisanen L, Leukka M, Dahl S, Ijas P, Karkkainen P, Vuorinen S, Heikkila H, Kaija T, Teirila I, Haapala J, Harkonen M, Reiman A, Salonen J, Sarkkinen H, Sihvola H, Turunen P, Taskila H, Virranniemi L, Huttunen S, Rintala E, Uusitalo-Seppala R, Pulli T, Sistonen A, Panttila A, Saikku J, Tapanainen M, Lumio J, Sinkkonen J, Routamaa M, Terho K, Elomaa N, Eriksen-Neuman B. Benchmarking antibiotic use in Finnish acute care hospitals using patient case-mix adjustment. J Antimicrob Chemother 2011; 66:2651-4. [DOI: 10.1093/jac/dkr333] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
4
|
Lehtinen P, Ashorn M, Iltanen S, Jauhola R, Jauhonen P, Kolho KL, Auvinen A. Incidence trends of pediatric inflammatory bowel disease in Finland, 1987-2003, a nationwide study. Inflamm Bowel Dis 2011; 17:1778-83. [PMID: 21744433 DOI: 10.1002/ibd.21550] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2010] [Accepted: 10/01/2010] [Indexed: 12/16/2022]
Abstract
BACKGROUND The present study aimed to characterize the incidence of pediatric inflammatory bowel disease (IBD) in Finland and determine its temporal trends. METHODS The patients' data were based on the database of the Social Insurance Institution. New cases diagnosed with IBD at the age <18 years in Finland between years 1987-2003 were included. Annual incidence rates were calculated per 100,000 pediatric populations (with 95% confidence intervals [CI]). The country is divided into 21 hospital districts and regional differences were evaluated accordingly. RESULTS The incidence of pediatric IBD increased from 5 per 100,000 in 1987 to 15 per 100,000 in 2003. The average rate of increase was 6.5% per year (95% CI 5.4%-7.5%). The trends were comparable for boys and girls, also by age group. Information on disease subtype was available from 1992 and during this 12-year period the incidence of Crohn's disease (CD) increased from 2-5 per 100,000 and that of ulcerative colitis (UC) from 4-9 per 100,000. CONCLUSIONS Our results demonstrate a very high incidence rate for childhood IBD and in particular UC in Finland. Furthermore, a rapid increase took place nationwide in the incidence of both CD and UC during the past two decades.
Collapse
Affiliation(s)
- Pieta Lehtinen
- Pediatric Research Centre, University of Tampere, Finland.
| | | | | | | | | | | | | |
Collapse
|
5
|
Sibakov J, Myllymäki O, Holopainen U, Kaukovirta-Norja A, Hietaniemi V, Pihlava J, Poutanen K, Lehtinen P. Lipid removal enhances separation of oat grain cell wall material from starch and protein. J Cereal Sci 2011. [DOI: 10.1016/j.jcs.2011.04.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
6
|
Heinonen S, Silvennoinen H, Lehtinen P, Vainionpää R, Heikkinen T. Feasibility of diagnosing influenza within 24 hours of symptom onset in children 1–3 years of age. Eur J Clin Microbiol Infect Dis 2010; 30:387-92. [DOI: 10.1007/s10096-010-1098-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2010] [Accepted: 10/09/2010] [Indexed: 10/18/2022]
|
7
|
Lehtinen P, Jartti T, Virkki R, Vuorinen T, Leinonen M, Peltola V, Ruohola A, Ruuskanen O. Bacterial coinfections in children with viral wheezing. Eur J Clin Microbiol Infect Dis 2006; 25:463-9. [PMID: 16819619 PMCID: PMC7088417 DOI: 10.1007/s10096-006-0166-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Bacterial coinfections occur in respiratory viral infections, but the attack rates and the clinical profile are not clear. The aim of this study was to determine bacterial coinfections in children hospitalized for acute expiratory wheezing with defined viral etiology. A total of 220 children aged 3 months to 16 years were investigated. The viral etiology of wheezing was confirmed by viral culture, antigen detection, serologic investigation, and/or PCR. Specific antibodies to common respiratory bacteria were measured from acute and convalescent serum samples. All children were examined clinically for acute otitis media, and subgroups of children were examined radiologically for sinusitis and pneumonia. Rhinovirus (32%), respiratory syncytial virus (31%), and enteroviruses (31%) were the most common causative viruses. Serologic evidence of bacterial coinfection was found in 18% of the children. Streptococcus pneumoniae (8%) and Mycoplasma pneumoniae (5%) were the most common causative bacteria. Acute otitis media was diagnosed in 44% of the children. Chest radiographs showed alveolar infiltrates in 10%, and paranasal radiographs and clinical signs showed sinusitis in 17% of the older children studied. Leukocyte counts and serum C-reactive protein levels were low in a great majority of patients. Viral lower respiratory tract infection in children is often associated with bacterial-type upper respiratory tract infections. However, coexisting bacterial lower respiratory tract infections that induce systemic inflammatory response are seldom detected.
Collapse
Affiliation(s)
- P. Lehtinen
- Department of Pediatrics, Turku University Hospital, PL 52, Turku, 20521 Finland
| | - T. Jartti
- Department of Pediatrics, Turku University Hospital, PL 52, Turku, 20521 Finland
| | - R. Virkki
- Department of Radiology, Turku University Hospital, PL 52, Turku, 20521 Finland
| | - T. Vuorinen
- Department of Virology, University of Turku, Kiinamyllynkatu 13, Turku, 20520 Finland
| | - M. Leinonen
- National Public Health Institute, PL 310, Oulu, 90101 Finland
| | - V. Peltola
- Department of Pediatrics, Turku University Hospital, PL 52, Turku, 20521 Finland
| | - A. Ruohola
- Department of Pediatrics, Turku University Hospital, PL 52, Turku, 20521 Finland
| | - O. Ruuskanen
- Department of Pediatrics, Turku University Hospital, PL 52, Turku, 20521 Finland
| |
Collapse
|
8
|
|
9
|
Affiliation(s)
- P Lehtinen
- Department of Pediatrics, University Hospital, Turku, Finland
| | | | | |
Collapse
|
10
|
Lehtinen P, Tammivaara R, Seppä M, Luutonen S, Aärelä E. [Hyperventilation and the possibilities to treat it]. Duodecim 2002; 116:1969-75. [PMID: 12017610] [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: 02/25/2023]
Affiliation(s)
- P Lehtinen
- TYKS:n psykiatrian klinikka PL 52, 20521 Turku.
| | | | | | | | | |
Collapse
|
11
|
Heiniö RL, Lehtinen P, Oksman-Caldentey KM, Poutanen K. Differences Between Sensory Profiles and Development of Rancidity During Long-Term Storage of Native and Processed Oat. Cereal Chem 2002. [DOI: 10.1094/cchem.2002.79.3.367] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- R.-L. Heiniö
- VTT Biotechnology, P.O. Box 1500, FIN-02044 VTT, Finland
- Corresponding author. E-mail: Phone: + 358-9-456 5178. Fax: +358-9-455 2103
| | - P. Lehtinen
- Helsinki University of Technology, P.O. Box 1000, FIN-02015 TKK Finland
| | | | - K. Poutanen
- VTT Biotechnology, P.O. Box 1500, FIN-02044 VTT, Finland
| |
Collapse
|
12
|
Affiliation(s)
- R.-L. Heiniö
- VTT Biotechnology, P.O. Box 1500, FIN-02044 VTT Finland
- Corresponding author. E-mail: Phone: +358 9 456 5178. Fax: +358 9 455 2103
| | | | - K. Latva-Kala
- VTT Biotechnology, P.O. Box 1500, FIN-02044 VTT Finland
| | - P. Lehtinen
- Helsinki University of Technology, P.O. Box 1000, FIN-02015 TKK Finland
| | - K. Poutanen
- VTT Biotechnology, P.O. Box 1500, FIN-02044 VTT Finland
| |
Collapse
|
13
|
Abstract
A protein-rich fraction from oat was found to protect linoleic acid against oxidation in an aqueous suspension containing soybean lipoxygenase-1 and micellar linoleic acid. In this system the oat fraction reduced the initial oxidation rate of linoleic acid by 50% when the oat fraction/linoleic acid ratio was 5:1 (w/w). The oat fraction did not act on the lipoxygenase enzyme but reduced the concentration of linoleic acid that serves as a substrate for lipoxygenase-1. To achieve the reduction in the oxidation rate a contact between linoleic acid and the oat fraction was required. The efficiency of the protection was dependent on the duration of this contact: the maximum protection was reached after a 5-min incubation period. However, total cessation of oxidation was not reached with any concentration of the oat fraction, indicating that the oxidizible and non-oxidizible forms of linoleic acid are in equilibrium. Because lipoxygenase-1 prefers the monomeric form of the substrate, the present findings agree with the hypothesis that the oat fraction reduces the concentration of monomolecular form of substrate. In most food systems monomolecular free linoleic acid is liberated slowly and at relatively low concentrations, therefore, even a small amount of the oat fraction would guard the system from oxidative deterioration.
Collapse
Affiliation(s)
- P Lehtinen
- Helsinki University of Technology, Laboratory of Biochemistry and Microbiology, Post Office Box 6100, FIN-02015 TKK, Finland.
| | | |
Collapse
|
14
|
Lövgren T, Heinonen P, Lehtinen P, Hakala H, Heinola J, Harju R, Takalo H, Mukkala VM, Schmid R, Lönnberg H, Pettersson K, Iitiä A. Sensitive bioaffinity assays with individual microparticles and time-resolved fluorometry. Clin Chem 1997; 43:1937-43. [PMID: 9342016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Future immunoassays and nucleic acid hybridization assays will be performed in miniaturized formats that utilize microchips or microparticles. This will require a sensitive detection technology that allows spatial resolution. By using fluorescent europium chelates and time-resolved microfluorometry, one can detect 11,000 europium molecules on individual microparticles. In a miniaturized noncompetitive immunoassay of prostate-specific antigen (PSA), we quantitatively detected 5 ng/L (0.05 amol per particle) of the analyte on an individual microparticle with excellent precision over the whole measurement range (CV <10%). Using a hybridization assay, we also could detect the deltaF508 mutation for cystic fibrosis on individual microparticles. Consequently, fluorescent lanthanide chelate labels and time-resolved microfluorometry qualify as the next generation of technology in this field.
Collapse
Affiliation(s)
- T Lövgren
- Department of Biotechnology, University of Turku, Finland.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Affiliation(s)
- H Lauerma
- Psychiatric Clinic, University of Turku, Finland
| | | | | | | | | | | | | |
Collapse
|
16
|
Lehtinen P, Niemelä P. Psychological factors related to post-abortion 'subtle' contraceptive unreliability. Scand J Psychol 1985; 26:277-84. [PMID: 4070997 DOI: 10.1111/j.1467-9450.1985.tb01164.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
17
|
Kulonen E, Aalto M, Aho S, Lehtinen P, Potila M. Fibroblast RNA and macrophage proteins (including the fibrogenic factor) in experimental silicosis. Environ Health Perspect 1983; 51:119-24. [PMID: 6196186 PMCID: PMC1569280 DOI: 10.1289/ehp.8351119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A hypothesis is presented for the action of silica-treated macrophages on protein synthesis in fibroblasts and also a method for the isolation of silica-attached materials in lung tissue. The increased protein synthesis in the fibroblasts is due, at least partly, to an increase in mRNA. Silica prevents the suppressing "macrophage effect" of macrophage-originated ribonuclease on fibroblasts. However, under certain conditions, collagen synthesis is stimulated by silica-treated macrophage preparations to such an extent that the effect cannot be explained by the inhibition of macrophage ribonuclease alone. We therefore postulate the existence of a fibrogenic factor, which is released by the macrophages. This factor has been demonstrated and can be purified from lung homogenate of SiO2-treated rats.
Collapse
|
18
|
|
19
|
Aho S, Lehtinen P, Kulonen E. Penetration of macrophage ribonuclease into fibroblasts and the effects on nucleic acid and collagen metabolism. Acta Pathol Microbiol Immunol Scand C 1982; 90:147-54. [PMID: 6180595 DOI: 10.1111/j.1699-0463.1982.tb01431.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
RNAase isolated from macrophage culture medium was labelled with 3H-acetic anhydride. The acetylation density of 1.8 acetyl residues/10(4) dalton RNAase was achieved. After just 5 mins' incubation of granulation-tissue slices with 3H-Ac-RNAase, the enzyme had entered fibroblasts, and after 20 min there was only slight increase of the radioactivity. After 1 h incubation 32% of the ingested RNAse was in the nuclei, 23% in the cytosol and about 2% in RER. After the same period of incubation with 3H-Ac-RNAase, 47% of nuclear RNA of the fibroblasts was lost, as compared with the control incubation, and the amount of cytosol RNA increased by about 40%. During a 3-h incubation, in low concentrations, the biologically active macrophage RNAase stimulated. 3H-thymidine incorporation into DNA of proliferative granulation-tissue slices. Thus it was concluded that the fibrogenic effect of the macrophage RNAase on the granulation-tissue fibroblasts takes place through the RNA metabolism and the main target of the enzyme in the fibroblasts is the nuclear RNA.
Collapse
|
20
|
Aho S, Lehtinen P, Kulonen E. The feedback effect of granulation-tissue extract on the subcellular level: the degradation of ribosomes. Acta Physiol Scand 1982; 114:401-5. [PMID: 7136771 DOI: 10.1111/j.1748-1716.1982.tb07001.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
21
|
Aho S, Lahesmaa R, Nuutila P, Lehtinen P, Pulkki K, Kulonen E. The in vivo effect of asbestos on the SiO2-induced macrophage fibrogenic factor and alkaline ribonuclease. Exp Pathol 1982; 21:181-6. [PMID: 6288440 DOI: 10.1016/s0232-1513(82)80068-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
22
|
Lehtinen P, Aho S, Kulonen E. Penetration of various mononuclear ribonucleases into rat experimental granulation-tissue fibroblasts and their intracellular effects. Hoppe Seylers Z Physiol Chem 1981; 362:1575-82. [PMID: 6172354 DOI: 10.1515/bchm2.1981.362.2.1575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The penetration of five different mononuclear ribonucleases into the subcellular particles of rat experimental granulation-tissue fibroblasts was compared, along with the effects of the enzymes on the fibroblast RNA fractions. Ribonucleases from normal and silica-treated rat peritoneal macrophages have been shown before to regulate the nucleic acid and protein metabolism of rat experimental granulation-tissue fibroblasts. These biologically active enzymes were taken into the fibroblasts in a greater amount than the corresponding human monocyte enzymes and the biologically inactive rat macrophage ribonuclease. The biologically active macrophage enzymes were incorporated mainly into the nuclear fraction. The other three mononuclear ribonucleases were not found particularly in any subcellular compartment. Both biologically active macrophage enzymes degraded the nuclear RNA of fibroblasts and released it to the soluble fraction in contrast to the biologically inactive macrophage enzyme and ribonuclease from normal human monocytes. Instead the ribonuclease from normal human monocytes seemed to degrade RNA in the soluble fraction. There were no marked differences in the subcellular effects of ribonucleases from normal and silica-treated macrophages. However, the treatment of human monocytes with silica changed their ribonuclease so that it split the nuclear RNA of fibroblast and released it to the soluble fraction in the same way as the biologically active macrophage enzymes did.
Collapse
|
23
|
Niemelä P, Lehtinen P, Rauramo L, Hermansson R, Karjalainen R, Mäki H, Storå CA. The first abortion - and the last? A study of the personality factors underlying repeated failure of contraception. Int J Gynaecol Obstet 1981; 19:193-200. [PMID: 6120865 DOI: 10.1016/0020-7292(81)90061-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The causes leading to a second abortion were outlined in a psychological study comparing 30 women expecting a second abortion with 29 women who had successfully prevented conception after a first abortion. It was found that both groups improved their contraceptive practices after the first abortion. However, while the latter group continued with their improved practices, the former group went back to the earlier inefficient or non-existent contraceptive behavior. The inability to improve contraception in the long run was not related to differences in educational level or knowledge about contraceptive techniques but to the developmental level of personality structures. The women expecting their second abortion rated lower in control of impulsivity, emotional balance, realism, self-esteem and stability of life as well as capacity for more integrated personal relationships. The differences in personality development and consequently in the capacity for long-term contraception were found to be due to growth conditions in childhood.
Collapse
|
24
|
Abstract
Two alkaline RNases, designated RNase 1 and RNase 2, were isolated from the culture media of silica-treated and non-treated macrophages. The yield of RNase from the medium of silica-treated macrophages was 30% of that from the non-treated control. The effects of these RNases on cultured granuloma fibroblasts and on granulation-tissue nuclei were studied. RNase 1 inhibited thymidine incorporation into fibroblasts except at low concentrations, where it was observed to be stimulatory. RNase 1 also inhibited the protein synthesis of fibroblasts. The incorporation of cytidine into RNA in cultured fibroblasts was not affected by RNase 1, but the incorporation into isolated nuclei was decreased. In pulse chase experiments RNase 1 increased the release of cytidine, but not that of thymidine, from the cells. RNase 2 had no effect on the protein or nucleic acid metabolism of the fibroblasts or on the RNA metabolism of isolated nuclei, perhaps because of impermeability. These experiments confirm that macrophage RNase activity is able to regulate the metabolism of granulation-tissue fibroblasts by increasing RNA degradation. Through this action it also regulates DNA and protein synthesis and other metabolic functions of those cells.
Collapse
|
25
|
Lehtinen P, Kulonen E. Subcellular targets of the soluble SiO2-liberated macrophage factors in experimental granulation tissue. Biochim Biophys Acta 1979; 564:132-40. [PMID: 231456 DOI: 10.1016/0005-2787(79)90194-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The supernatant from SiO2-treated macrophages increased the incorporated radioactivity of collagen in the incubated experimental granulation tissue slices, especially in the rough endoplasmic reticulum fraction, markedly over that in the respective control preparation. The effect was observed after a 20 min incubation and increases linearly at least up to 3 h. The amount of RNA and phospholipids in the rough endoplasmic reticulum, calculated per protein, increased simultaneously in the incubated slices. The incorporation of the radioactive precursors into DNA in the slices and in the nuclei from proliferating granulation tissue was enhanced significantly by the soluble fraction from SiO2-treated macrophages. This effect could be seen after a 40 min incubation in the slices and after 5 min in the nuclei, when the incorporated radioactivity in DNA began to decrease in the control experiments.
Collapse
|
26
|
Lehtinen P. Effects of soluble fractions from untreated and SiO2-treated subcellular particles of macrophages on nucleic acid metabolism in isolated nuclei of experimental granulation tissue. Acta Chem Scand B 1979; 33:171-4. [PMID: 220832 DOI: 10.3891/acta.chem.scand.33b-0171] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nuclei isolated from proliferating granulation tissue were incubated with 20 000 g supernatants from untreated and SiO2-treated subcellular particles of rat peritoneal macrophages in the presence of radioactive nucleic acid precursors. The supernatant from SiO2-treated subcellular particles increased the incorporation of [3H]CTP into nuclear RNA maximally by 26% at 5 min, and that of [methyl-3H]dTTP into DNA by 16% at 20 min. The release of radioactivity from labeled DNA was suppressed simultaneously. An RNase preparation from rat peritoneal macrophages enhanced the release of radioactivity from labeled DNA similarly as the soluble fraction from untreated subcellular particles of macrophages. The results suggest that the effects of the soluble fractions upon DNA metabolism of granuloma cells are at least partly independent of the effects on RNA metabolism and that the soluble fraction from SiO2-treated subcellular particles of macrophages stabilizes DNA through inhibition of nuclease activity.
Collapse
|
27
|
Abstract
The 7000 g pellet of homogenized mature sponge-induced granulation tissue was fractionated by centrifugation in a stepwise sucrose gradient in order to study the synthesis and secretion of collagen and other components of this tissue on the subcellular level. As indicated by chemical and enzymatic assays, by electron microscopy and by incorporation experiments, the collagen-synthethesizing rough endoplasmic reticulum fraction was isolated free from the secretory vesicles (smooth endoplasmic membranes and Golgi elements) and fibrous extracellular matrix. Collagen differed from other proteins in the distribution among the subcellular fractions. In pulse-chase experiment the translocation of 14C-labelled collagen was demonstrated from the rough endoplasmic reticulum through the secretory vesicles to extracellular fibrillar collagen. This fractionation method will be used to study the modulation of collagen synthesis and secretion in the reparative tissue.
Collapse
|
28
|
Lehtinen P, Takala I, Kulonen E. Dependence of collagen synthesis by embryonic chick tendon cells on the extracellular concentrations of glutamine. Connect Tissue Res 1978; 6:155-9. [PMID: 154987 DOI: 10.3109/03008207809152625] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
An agent in rheumatoid synovial fluid which stimulates collagen synthesis by embryonic chick tendon cells was identified as glutamine. The stimulating effect was observed only at a subnormal concentration of proline (0.02 mM). The concentration of glutamine in rheumatoid synovial fluid is about 2.5 mM but it falls rapidly during storage even at -20 degrees C. Collagen synthesis is shown to depend on the extracellular concentrations of glutamine and proline in addition to any connective tissue activating factors.
Collapse
|
29
|
Lehtinen P, Pikkarainen J, Kulonen E. Preparation of a glass-adhering protein of the plasma membranes from peritoneal macrophages. Biochim Biophys Acta 1976; 439:393-7. [PMID: 952965 DOI: 10.1016/0005-2795(76)90075-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
30
|
Kulonen E, Lehtinen P, Potila M. Application of granulation-tissue slices and matrix-free tendon cells in the screening of connective tissue-active indoles. Acta Pharmacol Toxicol (Copenh) 1976; 39:7-16. [PMID: 988973 DOI: 10.1111/j.1600-0773.1976.tb03150.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
31
|
Abstract
1. A procedure was developed for the preparation of plasma membranes from experimental granulation tissue of the rat without the addition of enzymes. The yield is better than 20% and the purification at least tenfold. 2. Values are given for the activities of 5'-nucleotidase, Na-+, k-+-activated Mg-2+dependent adenosine triphosphatase and leucine beta-naphthylamidase, for lipid composition, and for the gel-electrophoretic patterns of proteins and glycoporteins in the membrane preparations. 3. The plasma membranes from the mature granulation tissue contain proportionally more protein in the lipid phase, but the specific activities of 5'-nucleotidase and Na-+,K-+-activated Mg-2+-dependent adenosine triphosphatase are smaller than in the proliferating tissue. Certain differences were repeatedly observed in the gel-electrophoretic patterns of the developmental phases. 4. The plasma membranes from the granulation tissue were compared with those from rat peritoneal macrophages and from embryonic-chick tendon cells.
Collapse
|
32
|
Lehtinen P, Känkänen L, Kulonen E. Properties of plasma membranes from granulation tissue with reference to extracellular matrix. Acta Chem Scand B 1975; 29:963-8. [PMID: 1956 DOI: 10.3891/acta.chem.scand.29b-0963] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Treatment with neuraminidase decreased the activity of Na+,K+-activated Mg2+-adenosine triphosphatase in plasma membranes isolated from experimental granulation tissue but not that of 5'-nucleotidase or leucine-beta-naphthylamidase. A temporary lowering of the pH of the plasma membrane suspension to 2-3 inactivated all three enzymes, which remained inactive after the pH had been readjusted to 7.4. Addition of dextran preparations to the membrane suspension decreased the activity of adenosine triphosphatase. Ethanol (0.4%) had a similar effect. These marker enzymes of plasma membranes were not affected by additions of hyaluronate, chondroitin sulfate, protein polysaccharide or soluble collagen. Serotonin stimulated the adenosine triphosphatase activity slightly. About 10-20% of the protein in the plasma membrane preparation was extracted with EDTA. This "fuzzy coat" fraction yielded a distinct gel-electrophoretic protein pattern. Hyaluronidase was not helpful in cleaving this surface layer from the plasma membranes.
Collapse
|
33
|
Vihersaari M, Lehtinen P, Kulonen E. Adenylyl cyclase in isolated plasma membranes of granulation tissue. Acta Chem Scand B 1975; 29:1090-1. [PMID: 1217424 DOI: 10.3891/acta.chem.scand.29b-1090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
34
|
Hyyppä M, Lampinen P, Lehtinen P. Alteration in the sexual behaviour of male and female rats after neonatal administration of p-chlorophenylalanine. Psychopharmacology (Berl) 1972; 25:152-61. [PMID: 4261778 DOI: 10.1007/bf00423192] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
35
|
|
36
|
Hyyppä M, Lehtinen P, Rinne UK. Effect of L-dopa on the hypothalamic, pineal and striatal monoamines and on the sexual behaviour of the rat. Brain Res 1971; 30:265-72. [PMID: 5315473 DOI: 10.1016/0006-8993(71)90078-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|