Biomedical subjects

B A Buckingham

Publications and source records attributed to B A Buckingham.

9 recordsLinked to original sources

PubMed1995

IL-4 expression in human T cells is selectively inhibited by IL-1 alpha and IL-1 beta.

Imbalances in anti-inflammatory and proinflammatory cytokines may be responsible for initiation or progression of diverse pathologic states including autoimmune and infectious diseases. IL-4 production of proinflammatory cytokines and IL-12 promotes differentiation and activation of IFN-gamma-producing T cells, but does a counter-regulatory effect of proinflammatory cytokines on IL-4 production exist? This study evaluates the effect of proinflammatory cytokines (IL-1 alpha, IL-1 beta, IL-6, IL-12, and TNF-alpha) on IL-4 production in primary human T cell cultures. PBMCs from healthy individuals were tested for IL-4 production in response to PHA and various cytokines. IL-4 was measured by proliferation of the IL-4-sensitive T cell line (CT.h4S) or ELISA. IL-1 alpha and IL-1 beta inhibited IL-4 production by 20 to 80% in > 92% of healthy individuals (p = 0.0001, paired t-test). IL-12 had an inhibitory effect on PBMC IL-4 production as previously described, but neither IL-6 nor TNF-alpha inhibited IL-4 production. IL-1 had no effect on PHA-induced PBMC or purified T cell proliferation or IL-2 production. IL-4 production by purified T cells stimulated by PHA or the combination of PMA with calcium ionophore (A23187) was inhibited by IL-1, and reconstitution with peripheral blood-derived adherent macrophages had no effect. IL-12 did not inhibit IL-4 production in stimulated purified T cells. Steady state IL-4 mRNA levels were determined by semiquantitative competitive reverse transcribed PCR (RT-PCR). Marked inhibition of IL-4 mRNA levels were seen at 5 h after exposure to IL-1. This interaction between IL-1 and IL-4 may be an important physiologic regulator of the balance between proinflammatory cytokines from activated macrophages and anti-inflammatory cytokines from T cells.

Base Sequence↗

PubMed1988

The surgical management of hyperinsulinism in infancy due to nesidioblastosis.

Severe neonatal hypoglycemia due to nesidioblastosis demands prompt diagnosis and treatment to prevent mental retardation. Early central venous catheter placement is essential for a constant glucose infusion. At surgery, near-total (95%) pancreatectomy is done, starting at the tail and preserving the spleen. Bipolar electrocoagulation is very useful for the tiny vessels. The uncinate process is removed leaving a small amount of pancreas adjacent to the preserved common bile duct. Three patients, diagnosed shortly after birth, had surgery at 34 days, 2 years, and 17 days of life. Two patients developed staphylococcal infections, one of whom exhibited the "scalded baby" syndrome and required reoperation for evisceration. Insulin was required for one to seven days in two and for three months in one. Diazoxide was needed for 18 months in the initial patient, who did not have uncinate resection. All patients are healthy and off medication with a postoperative follow-up period of 11, 12, and 65 months.

Adenoma, Islet Cell↗

PubMed1981

Hyperthyroidism in children. A reevaluation of treatment.

The results of medical and surgical therapy were determined in 107 hyperthyroid children. After surgery, 85% of patients were rendered free of hyperthyroidism; however, 62% became hypothyroid. After medical treatment, 30% of patients were euthyroid and 2% became hypothyroid. The relapse rate, however, was higher after medical (22%) than after surgical (9%) therapy. Serious drug-related complications (arthritis-, hepatitis-, and collagen disease-like syndromes) occurred in 14% of patients. Complications occurred in 9% of surgically treated patients, but recurrent laryngeal nerve injury or permanent hypoparathyroidism did not occur. In medically treated patients, both a goiter size less than three times normal prior to treatment and a reduction in goiter size to less than two times normal at the completion of therapy correlated with a successful outcome.

Adolescent↗

PubMed1981

Rhabdomyolysis in diabetic ketoacidosis.

A 2-year-old boy became ill with diabetic ketoacidosis complicated by severe rhabdomyolysis. He completely recovered from the rhabdomyolysis, but has persistent insulin-dependent diabetes mellitus (IDDM). Serological studies showed that the patient's serum contained high titers of coxsackievirus B4 antibody, suggesting that the development of rhabdomyolysis and IDDM may have been related to this infection. A review of the records of 133 patients admitted with onset of IDDM disclosed one additional patient with marked myoglobinuria, and 11 patients with orthotolidine-positive urine in the absence of hematuria. These findings suggest that myoglobinuria may not be uncommon at the onset of IDDM.

Child, Preschool↗

PubMed1980

Thyroidectomy for hyperthyroidism in children.

Between November 1964 and August 1978, 66 patients underwent subtotal thyroidectomy for hyperthyroidism. Fifty-seven of these patients have been followed for more than 2 yr postoperatively and form the basis for this report. The mean age of these patients was 11 7/12 yr. There wre no deaths in this series and no recurrent laryngeal nerve injuries. Hyperthyroidism recurred in 4 patients from 10 to 60 mo following surgery (mean of 30 mo). Patients with relapse had a significantly larger gland at operation, but no difference in estimated thyroid remnant. Those patients with larger glands at exploration need a relatively larger percentage of the gland removed to prevent recurrent hyperthyroidism.

Adolescent↗

PubMed1977

Pathologic and immune factors in thyroid disease.

Thyroid glands from 33 children with hyperthyroidism and nine with juvenile lymphocytic thyroiditis were examined histologically and for IgG, IgA, IgM, and C3 by immunofluorescent staining. There was no significant difference between glands with JLT and those with hyperthyroidism in the degree of lymphoid infiltration or lymphoid follicle formation. In thyroiditis there was no correlation between the degree of histologic abnormalities and the presence of immunofluorescent staining for IgG, IgM, or IgA. In hyperthyroidism there was a correlation between the degree of histologic abnormalities and the presence of IgG. In both groups of patients LI and LFF were distinctly more severe in glands positive for C3. Postsurgical hypothyroidism correlated with LI but not with LFF, IgG, or C3.

Adolescent↗

PubMed1977

Thyroid function in children with chronic renal failure.

Thyroid function was evaluated in 24 children (aged 4-18 years) with chronic renal failure either before institution of hemodialysis or after more than 3 months of hemodialysis. 22 patients were clinically euthyroid and 2 were hypothyroid; in one case hypothyroidism was secondary to cystinosis and in the other it followed radiation therapy. The 2 hypothyroid patients had subnormal levels of T4, T3, FTI and FT4 as well as elevated serum TSH levels. Mean values for T4, T3, FTI and FT4 for the remaining 22 patients were within the normal range, but were significantly decreased, (all p values less than 0.01) when compared to controls. TSH and TBG levels were not significantly different from those of the normal population. Eleven of the euthyroid patients (50%) had either T3 or FT4, but not both, below the normal range without elevation of their TSH levels. These findings suggest that in the absence of other causes of hypothyroidism, children with chronic renal failure are able to maintain a clinically euthyroid state with either normal FT4 or T3 serum levels and can respond to primary gland failure with elevated TSH secretion.

Adolescent↗

PubMed1977

Surgical treatment of hyperthyroidism in children.

During the past ten years, subtotal thyroidectomy for hyperthyroidism was performed upon 43 children at Childrens Hospital of Los Angeles. There were no deaths, no recurrent laryngeal nerve injuries and no permanent hypoparathyroidism. During the one to ten year follow-up period, one patient had recurrent hyperthyroidism develop and was treated with 131I. Twenty-five patients are hypothyroid and require thyroid supplement; 14 are euthyroid and receiv no medication. Postoperative thyroid function did not correlate well with gland remnant size, degree of fibrosis or the extent of lymphoid follicle formation. Lymphocytic infiltration was more severe in patients who had hypothyroidism develop postoperatively. Transient hypocalcemia developed in 22 patients. The effectiveness and safety of the surgical treatment for hyperthyroidism in children is reaffirmed, and it is advocated for consideration over 131I or prolonged medical therapy.

Adolescent↗

PubMedDate not supplied

Scleroderma-like changes in insulin-dependent diabetes mellitus: clinical and biochemical studies.

Children with insulin-dependent diabetes mellitus (IDDM) were examined for scleroderma-like changes of digital sclerosis and joint contractures. Of the 104 patients, 19 (18%) demonstrated these features; five patients had both multiple joint involvement and skin changes; three were studied in detail. All three had restrictive pulmonary disease. Histopathology of skin in these three patients demonstrated increased accumulation of collagen in the lower dermis. In two of the patients, the extractability of collagen in 0.5 N acetic acid was decreased by about 50% as compared with normal controls, which suggests increased cross-linkage of collagen. In addition, the mean nonenzymatic glycosylation of collagen in these three patients was 13 times that of controls. The results indicate that distinct histopathologic and biochemical changes can be detected in the skin of these patients. The results further support the hypothesis that nonenzymatic glycosylation may alter the turnover of collagen, thus contributing to the development of a scleroderma-like syndrome with skin, joint, and pulmonary findings in patients with IDDM.

Adolescent↗