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Biomedical subjects

S Wolf

Publications and source records attributed to S Wolf.

At least 289 records · Page 16Linked to original sources
PubMed1988

The human genes for GM-CSF and IL 3 are closely linked in tandem on chromosome 5.

As demonstrated by long-range mapping of restriction endonuclease recognition sequences and genomic cloning, we found that the human genes encoding interleukin 3 (IL 3) and granulocyte/macrophage colony-stimulating factor (GM-CSF) are tandemly arrayed on the long arm of chromosome 5, separated by 9 kilobases (kb) of DNA. This close physical linkage of genes with similar structure and biologic function suggests that these cytokines may have evolved from a common ancestral gene. This linkage in evolution of two relatively divergent genes further implies that some of the other lymphokine and cytokine genes that appear to share as much or more sequence similarity than do IL 3 and GM-CSF may be distantly related members of a cytokine gene family.

Chromosome Mapping↗
PubMed1988

[Treatment trials of plasminogen activator (rt-PA) in central vein thrombosis of the retina].

Five patients with central retinal vein occlusion were treated by fibrinolysis using recombinant tissue plasminogen activator (rt-PA). Three patients received 70 mg of rt-PA within 90 minutes followed by 1000 I.U. of heparin per hour. The retinal blood flow was measured by videofluorescence angiography. The arterio-venous passage time initially prolonged was diminished after the fibrinolysis. Also the vision and the plasma viscosity were improved. However, this beneficial effect lasted only for a few days. Therefore, two other patients were treated for three days by daily infusions of 70 mg rt-PA. This longterm lysis did not improve vision, arterio-venous passage time or plasma viscosity. No side effects of this fibrinolytic therapy were observed. But ten days later, all of these patients had to be treated by photocoagulation.

Adult↗
PubMed1987

[Glomerulonephritis (GN) in childhood. I. Epidemiology, clinical aspects and kidney function in 125 children].

The blood pressure, urinary symptoms (proteinuria, hematuria, casts), the albumin- and cholesterol concentration in the serum and the renal function (GFR, RPF) of 125 children with chronic glomerulonephritis (GN) were analysed. 76 children had only single symptoms (93% proteinuria, 33% hypertension), which indicated a GN. The serum albumin and cholesterol concentration were pathological in 43% of the patients and serum creatinine level was pathological in 20% of the children. After 6 years the individual courses of renal function demonstrated a deterioration of GFR and RPF for most of the children. It can be concluded, that the summary consideration of epidemiology, symptomatology and renal function of different glomerular lesions has only a limited application to the clinical practice.

Adolescent↗
PubMed1986

Microcirculation in the conjunctival capillaries of healthy and hypertensive patients.

To study the impact of hypertension on conjunctival circulation, one group of healthy individuals and three groups of hypertensive patients (different stages of disease) were examined. Each participant had to undergo videomicroscopy to determine erythrocyte velocity in conjunctival capillaries, reactive hyperaemia and the diameter of the erythrocyte column within the vessels. Compared to healthy subjects, erythrocyte velocity and the diameter of the erythrocyte column were markedly increased in hypertensive patients. Furthermore the normalization of the erythrocyte velocity after a period of hypoxia was impaired in the hypertensives. These results indicate that changes in microcirculation due to hypertension can be detected by video microscopy.

Adult↗
PubMed1986

Microcirculation and hemorheology of children with type I diabetes.

A group of 53 children, suffering from diabetes mellitus type I and a group of 12 healthy children were compared. In both groups the following data were determined: Haemoglobin A1C, retinal blood flow (video fluorescence angiography), erythrocyte velocity in finger nailfold capillaries (video capillaroscopy), capillary tortuosity, plasma viscosity, erythrocyte rigidity, and haematocrit. The degree of capillary tortuosity was significantly elevated and erythrocyte velocity was significantly diminished in the group of diabetic children in comparison to the healthy children. Regarding rheological data there was a significant decrease in erythrocyte deformability for the diabetic children. Diabetic children with good stabilization presented better rheological parameters than the poorly stabilized ones. Although these findings provided sufficient information, it will be necessary to cover a long follow up period to judge the prognosis of good and poorly stabilized diabetic children.

Adolescent↗
PubMed1986

Common bacterial pneumonitis in infants. Determining the etiology and tailoring the treatment.

In infantile pneumonia, we recommend close attention to the history and physical examination. Baseline studies, including CBC, ESR, blood cultures, and chest film, should be performed at onset and repeated as warranted. Nasopharyngeal secretions or washings should be drawn by means of gentle suction and specimens sent for Gram stain, fluorescent antibody stain for respiratory syncytial virus, and culture for bacteria and for viruses if possible. Acute and convalescent serum specimens should be obtained in serious cases to search for antibodies to RSV, adenovirus, influenza, parainfluenza, cytomegalovirus, and Chlamydia. Serum and urine specimens may be collected for countercurrent immunoelectrophoresis and latex agglutination testing for Hemophilus influenzae type B, Streptococcus pneumoniae, and if indicated, group B streptococcus. If deterioration continues and all tests are negative, the clinician should consider a more invasive procedure such as flexible fiberoptic bronchoscopy, needle aspiration, or open lung biopsy. While awaiting identification of the pathogen, the physician should institute empiric therapy with optimum doses of antimicrobials and monitoring of serum levels of drug. Often the clinician is faced with deterioration and a negative workup. In this situation, other agents may be added, such as antifungal, antiviral, antiprotozoan, and antituberculous agents, as well as various antibiotics, to cover rare and unusual pathogens. Further consultation, even by phone, may at this point provide some insight into an otherwise confusing case.

Bacterial Infections↗