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Biomedical subjects

A Saebø

Publications and source records attributed to A Saebø.

At least 19 recordsLinked to original sources
PubMed2005

Milk fat synthesis is unaffected by abomasal infusion of the conjugated diene 18:3 isomers cis-6,trans-10, cis-12 and cis-6,trans-8,cis-12.

It has been previously established that trans-10,cis-12 CLA is a potent inhibitor of milk fat synthesis. Although the mechanism of this action is not completely understood, it has been speculated that eicosanoid-like metabolites of this isomer formed by the activity of tissue desaturases may be responsible for its activity. The objective of this study was to investigate the effects of an enrichment containing an 18:3 conjugated diene, produced in the metabolism of trans-10,cis-12 CLA, on milk fat synthesis. Three rumen-fistulated Holstein cows (210+/-8 d in milk) were randomly assigned in a 3 x 3 Latin square experiment. Treatments were (i) control, (ii) trans-10,cis-12 CLA supplement (2.1 g/d; positive control), (iii) enrichment providing two conjugated diene 18:3 isomers (2.6 g/d of cis-6,trans-10,cis-12 and 4.0 g/d of cis-6,trans-8,cis-12) and trans-10,cis-12 CLA (2.1 g/d). Treatments were abomasally infused for 5 d at 4-h intervals, and there was a 7-d interval between periods. Milk yield, dry matter intake, and milk protein yield were unaffected by treatments. In contrast, the trans-10,cis-12 CLA supplement reduced milk fat yield by 27%, whereas the supplement enriched with conjugated diene 18:3 isomers (treatment iii) had no effect on milk fat yield beyond that attributable to its trans-10,cis-12 CLA content. The transfer efficiency of trans-10,cis-12 CLA into milk fat was 25 and 24% for treatments ii and iii, respectively. At the same time, the abomasally infused conjugated diene 18:3 isomers were transferred to milk fat with an efficiency of 33 and 41% for cis-6,trans-10,cis-12 and cis-6,trans-8,cis-12 18:3, respectively. Overall, short-term abomasal infusion of the conjugated diene 18:3 isomers had no effect on milk fat synthesis, thereby offering no support for an involvement of metabolites of trans-10,cis-12 CLA in the regulation of milk fat synthesis.

Abomasum↗
PubMed2004

Use of conjugated linoleic acid (CLA) enrichments to examine the effects of trans-8, cis-10 CLA, and cis-11, trans-13 CLA on milk-fat synthesis.

Conjugated linoleic acid (CLA) supplements have typically been comprised of 4 isomers (trans-8, cis-10; cis-9, trans-11; trans-10, cis-12; and cis-11, trans-13 CLA). Abomasal infusion of pure isomers has shown that trans-10, cis-12 CLA is a potent inhibitor of milk-fat synthesis, whereas cis-9, trans-11 CLA has no effect. However, there appear to be additional fatty acids that inhibit milk-fat synthesis, and the objective of this study was to investigate the effects of additional CLA isomers present in CLA supplements. Four rumen fistulated Holstein cows (141+/-8 DIM, mean+/-SE) were randomly assigned in a 4 x 4 Latin square experiment. Treatments were abomasal infusion of (1) skim milk (negative control), (2) trans-10, cis-12 CLA supplement (positive control), (3) trans-8, cis-10 CLA supplement, and (4) cis-11, trans-13 CLA supplement. Treatments 2 through 4 were targeted to provide 4 g/d of the CLA isomer of interest. The trans-8, cis-10 CLA supplement had no effect on milk-fat yield, whereas the trans-10, cis-12 CLA supplement reduced milk-fat yield by 35%. The cis-11, trans-13 CLA supplement contained some trans-10, cis-12 CLA, and when data were compared to the positive control treatment group, it was obvious that cis-11, trans-13 CLA also had no effect on milk-fat synthesis. Milk-fat content of specific CLA isomers was significantly elevated within respective treatment groups. Milk yield, DMI, and milk protein yield were unaffected by treatment. Overall, trans-10, cis-12 CLA reduced milk-fat synthesis, whereas the other major isomers present in CLA supplements (trans-8, cis-10 CLA and cis-11, trans-13 CLA) had no effect.

Abomasum↗
PubMed2000

Identification of the conjugated linoleic acid isomer that inhibits milk fat synthesis.

Conjugated linoleic acids (CLA) are octadecadienoic fatty acids that have profound effects on lipid metabolism. Our previous work showed that CLA (mixture of isomers) markedly reduced milk fat synthesis. In this study, our objective was to evaluate the effects of specific CLA isomers. Multiparous Holstein cows were used in a 3x3 Latin square design, and treatments were 4-day abomasal infusions of 1) skim milk (control), 2) 9,11 CLA supplement, and 3) 10,12 CLA supplement. CLA supplements provided 10 g/day of the specific CLA isomer (cis-9,trans-11 or trans-10,cis-12). Treatments had no effect on intake, milk yield, or milk protein yield. Only the 10,12 CLA supplement affected milk fat, causing a 42 and 44% reduction in milk fat percentage and yield, respectively. Milk fat composition revealed that de novo synthesized fatty acids were extensively reduced. Increases in ratios of C(14:0) to C(14:1) and C(18:0) to C(18:1) indicated the 10,12 CLA supplement also altered Delta(9)-desaturase. Treatments had minimal effects on plasma concentrations of glucose, nonesterified fatty acids, insulin, or insulin-like growth factor-I. Overall, results demonstrate that trans-10,cis-12 CLA is the isomer responsible for inhibition of milk fat synthesis.

Abomasum↗
PubMed1999

Milk yield and composition during abomasal infusion of conjugated linoleic acids in dairy cows.

Conjugated linoleic acids refer to a mixture of positional and geometric isomers of linoleic acid with conjugated double bounds. Three supplements of conjugated linoleic acids which differed in isomer enrichment were infused into the abomasum of lactating dairy cows to determine postruminal effect on milk yield and composition. Four Holstein cows were used in a 4 x 4 Latin square design. Treatments were 3-d abomasal infusion of 1) control, 5 kg of skim milk (carrier for conjugated linoleic acid supplements), 2) conjugated linoleic acid supplement 1 (28.8 g/d; 6.9 g of cis/trans 9,11; 6.4 g of cis/trans 8,10), 3) conjugated linoleic acid supplement 2 (48.5 g/d; 7.1 g of cis/trans 9,11; 4.1 g of cis/trans 8,10; 8.3 g of cis/trans 10,12; 5.5 g of cis/trans 11,13), and 4) conjugated linoleic acid supplement 3 (16.3 g/d; 7.1 g of cis/trans 9,11; 7.2 g of cis/trans 10,12). Infusions increased the conjugated linoleic acids content of milk fat from 0.43 g/100 g of fat for the control treatment to 1.02, 1.52, and 0.95 g/100 g of fat for conjugated linoleic acid supplements 1, 2, and 3, respectively. Apparent efficiency of transfer in milk fat was 25.2, 33.5, 21.0, and 28.4% for cis/trans 8,10, cis/trans 9,11, cis/trans 10,12, and cis/trans 11,13, respectively. Infusion of conjugated linoleic acids had no effect on dry matter intake, milk yield, and milk protein content. However, conjugated linoleic acid supplements reduced the content and yield of milk fat by 28 and 25%, respectively. The similarity of response for the different conjugated linoleic acid supplements did not allow us to identify the specific role of different isomers, but the changes in milk fatty acid composition indicated that effects were primarily on de novo fatty acid synthesis and the desaturation process.

Abomasum↗
PubMed1996

Contralateral inguinal hernial development and ipsilateral recurrence following unilateral hernial repair in infants and children.

The aim of the present study was to evaluate the frequency of contralateral hernial development and ipsilateral recurrence following surgery for unilateral inguinal hernia in infants and children. During the period 1961-1970, 161 infants and children (143 males and 18 females; 0-12 years old) underwent surgery for unilateral inguinal hernia. The patients were followed for 20-29 years (until 1990). 16/143 males (11.2%), and 1/18 females developed a contralateral inguinal hernia; the frequency among patients less than seven years old was significantly higher than the frequency among older children (16/118 > 1/43; p < 0.05). No significant difference was observed between patients primarily operated for rightsided and leftsided hernias. Four/143 boys (2.7%) experienced testicular maldescens. Recurrence after herniotomy was seen in 9/143 males (6.3%), and in 1/18 females. The low frequency of contralateral hernial development, as the risk of surgical complications, indicate that routine contralateral inguinal exploration may not be recommended while operating upon unilateral symptomatic inguinal hernias. Our recurrence rate of 6.2% may mirror the conditions in a general surgical department, where several surgeons and residents operate upon a limited number of paediatric patients.

Child↗
PubMed1994

Prevalence of antibodies to Yersinia enterocolitica O:3 among Norwegian military recruits: association with risk factors and clinical manifestations.

IgG antibody activity to Yersinia enterocolitica serogroup O:3 was detected in sera from 56 (7.4%) of 755 Norwegian military recruits, using an enzyme-linked immunosorbent assay. The highest prevalence was found among recruits from Oslo city (12/56, 21.4%). The recruits answered a questionnaire which covered demographic data, specific exposures, and clinical information. The following risk factors were found to be independently associated with IgG activity in logistic regression analysis: receiving drinking water from a private well (odds ratio (OR) = 3.40; p = 0.004), being a resident of Oslo city (OR = 2.99; p = 0.006), and living in eastern Norway (OR = 2.25; p = 0.015). By univariate analysis, living in an urban area was associated with IgG activity, but this factor did not independently affect risk. Present or previous contact with animals, including pigs, and travels abroad were not associated with an increased risk. Yersinia enterocolitica O:3 seropositive recruits were more likely to report previous surgery for suspected appendicitis than seronegative individuals (OR = 4.26; p = 0.0024). Among recruits with previous appendectomy, mesenteric lymphadenitis as the sole peroperative finding was more common in patients with IgG activity to Y. enterocolitica O:3 (4/7) than in seronegative patients (1/19) (p = 0.01). Recurrent diarrhea, steatorrhea or joint complaints were not associated with antibody activity.

Adult↗
PubMed1994

Yersinia enterocolitica: an inducer of chronic inflammation.

The aim of the present study was to elucidate the connection between yersiniosis and chronic inflammation. During the period 1974-83, Yersinia enterocolitica infection was diagnosed in 458 hospitalized patients by antibody response, or isolation. The patients were followed for 4-14 years (1987); 160 were readmitted with chronic disease. Fifty-three patients had persistent joint complaints, 18 developed ankylosing spondylitis, 14 rheumatoid arthritis, and 17 iridocyclitis. Thirty-eight patients suffered from chronic abdominal pain, and another 28 from chronic diarrhoea. Two who underwent proctocolectomy microscopically had ulcerative colitis. Eleven patients developed neurological disease; others developed conditions such as chronic nephritis, thyroid disease, insulin-dependent diabetes, etc. Chronic hepatitis, found in 22 patients, was significantly correlated with positive test for antinuclear antibody and rheumatoid factor, and with death. Several patients developed chronic multiorgan disease, probably with chronic hepatitis as pivot. Regarding the whole material, the difference between observed and expected cumulative survival rates remained significant for 8 years (0.9189 < 0.9456; p < 0.025), indicating a substantial impact on long-term survival exerted by chronic yersiniosis.

Adolescent↗
PubMed1993

Could development of malignant mesothelioma be induced by Yersinia enterocolitica infection?

Two out of 458 hospitalized patients with Yersinia enterocolitica infection developed malignant mesothelioma of pleura viz. pericard; both died after a few months. Malignant mesothelioma of the pleura is commonly related to asbestos exposure, whereas pericardiac mesothelioma is an extremely uncommon neoplasm. The possible promotion of malignant mesothelioma by the Yersinia enterocolitica infection should not be disregarded, as the infection may launch chronic immunological reactions resembling those observed among asbestos workers.

Adult↗
PubMed1993

Yersinia enterocolitica infection--an unrecognized cause of acute and chronic neurological disease? A 10-year follow-up study on 458 hospitalized patients.

The purpose of the present study was to obtain further information about nervous system involvement associated with Yersinia enterocolitica infection. During the period 1974-1983, the infection was diagnosed by antibody response (agglutination titer or ELISA) and/or isolation of the microorganism in 458 hospitalized patients. 2 patients presented with acute symptoms of the peripheral nervous system, and 6 with symptoms of the central nervous system. The 458 patients were followed for 4-14 years (until 1987). During the follow-up period another 6 patients developed chronic neurological conditions; 4 with peripheral symptoms, and 2 with central symptoms. 11 of the 14 patients experienced persistent complaints. In 1991 (10-17 years after the diagnosis of yersiniosis), 6 patients still had significant antibody response (ELISA). The possibility that the immunologically competent Yersinia enterocolitica might have initiated the chronic neurological disease in these patients should not be disregarded.

Acute Disease↗
PubMed1992

Acute and chronic gastrointestinal manifestations associated with Yersinia enterocolitica infection. A Norwegian 10-year follow-up study on 458 hospitalized patients.

The aim of the present study was to elucidate the gastrointestinal manifestations of yersiniosis. During the period 1974 to 1983, Yersinia enterocolitica infection was diagnosed in 458 patients, by isolation from fecal samples or by antibody response. At first admission, 184 patients had abdominal pain; 200, diarrhea; 45, vomiting; and 36, weight loss. Ulcerative colitis was diagnosed in 7 patients, Crohn's disease in 2, and unspecific colitis in 11. Mesenteric lymphadenitis or ileitis were found in 43 of 56 patients at laparotomy. The patients were followed for 4 to 14 years (1987). Thirty-eight patients were readmitted with abdominal pain and 28 with diarrhea; these symptoms were significantly correlated with the corresponding symptoms at first admission. Chronic colitis was diagnosed in 4 patients, chronic weight loss in 12. A follow-up inquiry (380 patients) indicated that patients with right iliac fossa pain during the acute infection less frequently developed chronic abdominal complaints. Gastrointestinal symptoms are common in both the acute and chronic states of yersiniosis. The correlations between acute and chronic symptoms indicate that yersiniosis is a chronic disease. Immunologically competent individuals may profit by fighting the infection in the right iliac fossa. The relationship between yersiniosis and inflammatory bowel diseases may still not be settled.

Acute Disease↗
PubMed1992

Acute and chronic liver disease associated with Yersinia enterocolitica infection: a Norwegian 10-year follow-up study of 458 hospitalized patients.

During the period 1974-1983, Yersinia enterocolitica infection was diagnosed in 458 hospitalized patients by antibody response or isolation of the micro-organism. A total of 54 (11.9%) patients had acute liver infection, with significantly elevated serum levels (greater than or equal to 2-fold) of bilirubin and/or enzyme levels. Serious liver disease with cellular necrosis was observed in biopsy specimens from two of 12 patients examined; six had unspecific changes. The patients were followed up for 4-14 years (until 1987). A total of 22 (4.9%) patients were readmitted with chronic liver disease; in one case non-specific microscopic changes developed into granulomatous hepatitis over a period of 3 years. In both the acute and chronic stages of disease, liver involvement was associated with involvement of other organ systems, and some patients developed multi-organ disease. Chronic liver disease was associated with positive tests for antinuclear antibody and rheumatoid factor, and with a high mortality.

Adult↗
PubMed1992

Acute and chronic pancreatic disease associated with Yersinia enterocolitica infection: a Norwegian 10-year follow-up study of 458 hospitalized patients.

During the period 1974-1983, Yersinia enterocolitica infection was diagnosed in 458 hospitalized patients by antibody response or isolation of the micro-organism. Eight (1.75%) patients showed signs of acute pancreatitis with elevated serum or urine levels of amylase; two patients had acute insulin-dependent diabetes. The patients were followed up for 4-14 years (until 1987). Four patients were readmitted with chronic pancreatitis, and one with acute pancreatitis. Diabetes developed in two males and nine females; in seven cases this was associated with chronic conditions of possible autoimmune aetiology. In 1987 a significantly higher than expected prevalence of diabetes was demonstrated among female subjects aged 30-54 years. Yersinia enterocolitica infection constitutes a differential diagnosis in acute pancreatitis, and might be related to the development of chronic pancreatitis and diabetes.

Adult↗
PubMed1992

Survival and causes of death among patients with Yersinia enterocolitica infection. A Norwegian 10-year follow-up study on 458 hospitalized patients.

The aim of the present study was to elucidate the possible influence of the Yersinia enterocolitica infection on long-time survival, and to describe clinical conditions associated with a fatal issue. During the period 1974-83, Y. enterocolitica infection was diagnosed in 458 hospitalized patients by antibody response or isolation of the microorganism. The patients were followed for 4-14 years (until 1987). The observed cumulative survival rates for female patients, and for the whole material, deviated significantly from the expected rates for 10 and 8 years. Two patients died in association with the acute infection, and 2 died from malignant mesothelioma during the first year of observation. 4/42 other patients died during the follow-up period from chronic multiorgan disease, 9 from malignant disease, and 2 died from hematological disorders. A very high mortality (10/22) was observed among patients who had developed chronic liver disease subsequently to the infection. We conclude that chronic conditions associated with the Y. enterocolitica infection may exert a substantial impact on long-time survival.

Adolescent↗
PubMed1991

A survey of acute and chronic disease associated with Yersinia enterocolitica infection. A Norwegian 10-year follow-up study on 458 hospitalized patients.

The aim of the present study was to further elucidate acute and chronic manifestations of Yersinia enterocolitica infection. During the period 1974-83, 458 hospitalized patients were diagnosed by antibody response and/or isolation of the microorganism. 64 patients had suffered from chronic conditions as rheumatic disease, inflammatory bowel disease, hepatitis, nephritis or thyroid disease for some time. Acute hepatic, renal, cardiac, pulmonary, pancreatic or neurologic involvement were observed in a substantial portion of patients; several had multiorgan disease. Acute insulin-dependent diabetes was seen in 2 patients, malignant mesothelioma in 2, and specific lymph node inflammation in 1. The patients were followed for 4-14 years (1987). 36/160 readmitted patients had abdominal pain and 26 had diarrhea; chronic colitis was demonstrated in 4. Some patients developed rheumatic conditions; others developed chronic disease of liver, kidneys, heart, pancreas, thyroid or nervous system. Chronic liver disease, in 22 patients, was correlated with positive tests for antinuclear antibody and rheumatoid factor; and might influence development of malignant disease, and mortality. A variety of acute and chronic clinical pictures may be associated with Y. enterocolitica infection, and further clinical research is required in this field.

Acute Disease↗
PubMed1990

[Morgagni Hernia].

The article describes a 65 year-old female with a 40 years' history of abdominal discomfort and a supposed intrathoracal lipoma who was admitted to hospital with acute obstruction of the large bowel. Emergency laparotomy revealed a subcostosternal diaphragmatic hernia (hernia of Morgagni) containing omentum and a segment of transverse colon.

Aged↗
PubMed1987

Standardized treatment of colorectal cancer. A prospective study.

304 patients with colorectal adenocarcinoma underwent standardized, aggressive treatment which included wide resection, adjuvant radio- or chemotherapy and management of advanced disease. The mean age of the patients was 68 years; 50% were older than 70 years, and 17% above 80 years. The resectability rate was 86.2%. Overall postoperative mortality was 7.3%, in patients operated on for cure 5.7%, and in patients more than 80 years 16.3%. The highest postoperative mortality was seen following right hemicolectomy and deaths were mainly caused by anastomotic leakage and myocardial infarction. In patients with primarily inoperable rectal cancer treated with irradiation and followed by attempted curative surgery, the estimated 5-year survival was 38%. In patients with operable rectal cancer treated with preoperative irradiation followed by surgery the 5 year survival was 69% as compared to 45% for those treated with surgery only. Adjuvant cytostatic therapy in patients with colonic tumours of Dukes B and C stages did not improve survival.

Adult↗