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Biomedical subjects

G Borroni

Publications and source records attributed to G Borroni.

At least 73 records · Page 4Linked to original sources

[Cutaneous extramedullary hematopoiesis in idiopathic myelofibrosis. Description of a case].

The Authors present a case of cutaneous extramedullary hematopoiesis in a 63-year-old male patient with agnogenic myeloid metaplasia. The skin lesions appeared before splenectomy as multiple papules and nodules on the trunk. Histologic examination of a lesion showed all the tree components of the hematopoietic tissue, i.e. myeloid, erythroid and megakaryocytic series. A review of the literature revealed 18 previously reported cases, with polymorphous clinical manifestations of skin involvement. The possibility of extramedullary hematopoiesis should be considered in a patient with agnogenic myeloid metaplasia who shows cutaneous eruptions.

Hematopoiesis↗

[Necrobiosis lipoidica diabeticorum in children. Description of a case].

A case of necrobiosis lipoidica diabeticorum (NLD) in a 12-year-old male patient is described. Diabetes mellitus (DM) was diagnosed at the age of 1.5 years. The onset of the first NLD lesion had been previously observed at the age of 7, on the back of the left foot. Three new lesions appeared at the age of 8, one on the left leg, the others on the thighs. At the age of 12, four infiltrated, reddish patches, with slight central atrophy were evident on his lower extremities. Histopathological features showed foci of collagen degeneration with sclerosis, surrounded by a chronic, mainly perivascular, granulomatous infiltrate, made up of lymphocytes and histiocytes. The patient is now 19-year old, with no eye or kidney failure, owing to a constant metabolic control of DM. A constant follow-up of the patient demonstrated a self-resolution of NLD plaques, with no evidence of further lesions.

Child↗

Serological determination of rabies antibodies in vaccinated subjects.

This study reports the immunological response in subjects vaccinated against rabies. Four serological methods were compared: the immunoenzymatic test with HDCV virus vaccine (EIA-V) and with purified viral glycoprotein (EIA-P), the neutralizing in vitro rapid fluorescent focus inhibition test (RFFIT) and the indirect immunofluorescent test (IFI). A concordance of 93.3% was found with RFFIT and EIA-V, 86.8% with RFFIT and EIA-P and 80.5% with RFFIT and IFI. The RFFIT is the most sensitive and specific method for rabies antibodies but more expensive and difficult. IFI recognizes late nucleocapsid antibodies but reports more false positive and negative results. The EIA-V and EIA-P methods are efficient, sensitive, specific and inexpensive for routine use to detect protective titres of antibodies above 0.5 IU/ml fifteen days after the inoculation of HDCV vaccine.

Antibodies, Viral↗

[Early and late histologic aspects of atrophodermia vermiculata. A case study].

Atrophoderma Vermiculatum (AV) is a rare disease characterized by the occurrence on the face and the cheeks in particular, of fine, atrophic pits, with a bilateral distribution, producing a honeycomb, reticulate appearance. All the cases reported in the literature focus on the atrophic changes of the disease while no attention has been paid to the condition which causes atrophy. The early stages are not usually reported. MC is a girl aged 13. She had multiple, fine, pale-brown papules (1-2 mm in diameter) on her right cheek. The histopathological findings of these lesions predominantly showed lymphocytic perifolliculitis with perifollicular fibrosis. The epidermis was normal. No specific diagnosis other than perifolliculitis was possible. Eight months later the patient showed tiny, atrophic depressions and follicular plugs with reticulate teleangectases in the same area of the right cheek (with disappearance of the tiny papules). A clinical diagnosis of AV was done. The histological findings of a further biopsy showed atrophy of the epidermis, less severe perifollicular inflammation and decrease in number of the follicles. The hair follicles were widely dilated and were either empty or contained keratinous materials. Dermal atrophy and disappearance of elastic fibers was noticeable. In conclusion the late clinical features of the lesions, through unusual (asymmetry of the lesion, small and superficial atrophic scars), make the diagnosis of the early clinical and histological features of papules and perifolliculitis possible and suggest a specific name: early stages of AV.

Adolescent↗

Clonal structural chromosomal rearrangements in lymphocytes of four patients with Werner's syndrome.

Multiple numerical and structural chromosome abnormalities were found in cultured lymphocytes of four patients with Werner's syndrome. The proportion of metaphases with structural and/or numerical aberrations varied from 30 to 44% and several of them were clonal. These results confirm definitively that Werner's syndrome is a chromosome rearrangement syndrome and that these non-constitutional chromosome changes are not exclusive of cultured fibroblasts but present also in lymphocytes.

Adult↗

Chromosome instability in lymphocytes from a patient with Werner's syndrome is not associated with DNA repair defects.

Different cellular parameters used to detect genetic instability were analyzed in lymphocytes from a patient affected by Werner's syndrome (WS). Cytogenetic studies indicated the presence of structural and numerical chromosomal abnormalities and the occurrence of variegated translocation mosaicism. The baseline mutation frequency was similar to that observed in normal donor samples. DNA repair investigations showing a normal capability to perform UV-induced DNA repair synthesis and a normal sensitivity to various mutagens (UVC light, mono- and bi-functional alkylating agents) indicate that different DNA repair mechanisms act normally in WS. In this feature, WS appears to differ from the other genetically determined syndromes in which chromosomal instability is associated with a marked hypersensitivity to specific DNA-damaging agents.

Cells, Cultured↗

Familial steatocystoma multiplex: HLA, Gm, Km genotyping and chromosomal analysis in two unrelated families.

Steatocystoma Multiplex (S.M.) is an inherited condition characterized by the appearance of cysts during the first or second decade of life. Familial cases have occasionally been reported. We studied 13 patients affected by S.M. from two unrelated families, focusing our attention on HLA, Gm and Km genotypes and on chromosomal analyses. Although we failed to correlate the syndrome with a particular HLA, Gm or Km haplotype, we report some peculiarities and differences between these two families and the healthy Italian population.

Epidermal Cyst↗

Effects of medium-term PUVA therapy on peripheral T-lymphocyte subsets in psoriatic patients.

Three to four months' PUVA treatment is a widely-adopted procedure to induce psoriasis remission and for the purpose of this study is called "medium-term". The 32 psoriatic patients considered revealed a statistically significant baseline decrease in OKT3+ (p less than 0.001), OKT4+ (p less than 0.001) and OKT8+ (p less than 0.001) as compared with 40 healthy controls, while OKT4/OKT8 was normal. Variance analysis within the psoriatic group failed to reveal further significant variation in the immunological parameters during the 3 months under study. Nevertheless, there was a marked trend towards a reduction in OKT4+ cells and OKT4/OKT8 as compared with baseline values after 3 months. These results suggest that "medium-term" PUVA therapy does not statistically restore the pre-existing baseline changes in T-lymphocyte subsets of the psoriatic patients. The non-statistically significant effects as regards OKT4+ may be due to the small number of patients who reached 3 months' treatment (9 patients) but could be regarded as the first step towards the significant changes described here in long-term PUVA-treated psoriatic patients.

Adult↗

[Comparison of methods for the demonstration of Treponema-specific IgM].

In this research 113 sera have been analysed with three methods for IgM treponema-specific determination: IgM-SPHA, IgM-EIA and 19S IgM FTA-ABS. Among these sera, 33 samples related to non-treated patients at different stages of infection, and 80 samples to treated patients. The results point out a light sensibility of the IgM-SPHA in primary lues. The IgM-EIA test has performed a good specificity, but displayed a sensibility lower to the 19S IgM FTA-ABS, which proved the best of tests. About the cases of treated lues at different stages, in 23 samples with VDRL negative has been found no positivity at three tests used, while in 49 samples with VDRL positive 8 are resulted positive at 19S IgM FTA-ABS.

Antibodies, Bacterial↗

Skin extensibility time in women. Changes in relation to sex hormones.

The influence of female sex hormones on mechanical properties of the skin has been assessed in an in vivo extensometric study. Twenty young (20 +/- 4 years) and 12 middle-aged healthy women (42 +/- 3 years) entered the study. Measurements were carried out on the volar surface of the left forearm on the 10th and 25th day of the menstrual cycle. A significantly decreased skin extensibility time in the pre-menstrual phase was found (25th day) when compared with the 10th day in the young group, while the older one did not reveal significant changes. The data are compatible with an increased water content of the skin noticeable in the pre-menstrual phase and more relevant in young women. In studies on mechanical properties of the skin, changes relative to sex hormones and menstrual cycle need to be taken into account.

Adult↗

Changes in the water holding capacity of psoriatic stratum corneum in vivo.

This study investigated the functional capacity of the stratum corneum of psoriatic skin to bind water in vivo during a relatively long period of time (water holding capacity--WHC). An electrical capacitance test was applied to the psoriatic skin on the elbows, perilesional skin and apparently normal skin of 11 patients and the elbows of 10 controls. Measurements of electrical capacitance were performed using a Corneometer Schwarzhaupt for 25 min. The WHC levels were calculated for this period. Our results demonstrate that the WHC of psoriatic stratum corneum does not differ from controls in the first 10 min. Only after the 20th min do the WHCs differ significantly (p less than 0.02). Despite the biochemical keratin changes in psoriatic plaque, the latter is highly hygroscopic, in particular in the first minute after bathing. Perilesional skin binds water like the stratum corneum of controls, though not beyond the 20th minute after bathing.

Adult↗

[Changes in the biomechanic property of the skin after hemodialysis treatment].

Skin extensibility in 21 subjects (belonging to two different age groups) undergoing hemodialysis has been investigated. Measurements have been performed on the forearm before and after two hours of dialytic treatment. A significant decrease of skin extensibility (P less than 0.02) has been recorded in the elderly prior to the dialytic procedure; the data is consistent with an increased dermal water content. Water removal during treatment led to normalization of extensometric levels (P less than 0.05). However, improvement of skin extensibility is not directly related to the amount of water withdrawn. The study support the importance of water in determining skin viscoelastic responses; hemodialysis is a useful model to monitor the effects of water on skin biomechanics.

Age Factors↗

[Werner's syndrome and intracranial meningioma].

A case of Werner's Syndrome in a 47-year-old man, with typical features of progeria associated with intracranial meningioma is described. A revision of the literature showed that meningioma is the most frequent benign neoplasm in Werner's Syndrome. Meningioma is a peculiar model of neoplasm, because of the frequency of cytogenetical aberrations concerning chromosome n. 22. Either chromosome n. 22 and other chromosomal alterations could be detected in peripheral blood lymphocytes of our patient. These findings suggest a correlation between chromosomal instability and the onset of neoplasms in Werner's Syndrome. Furthermore, the possibility of detecting chromosome n. 22 aberrations in peripheral blood lymphocytes of Werner's Syndrome patients could provide a clue to the presence of a meningioma at a preclinical stage.

Humans↗

[Thallium-induced alopecia].

A case of accidental Thallium intoxication showing, as the only sign, alopecia of the scalp with depigmentation of the hair, is described. A 21 year old woman developed acute loss of hair after ingestion of contaminate tomatoes. No further signs of intoxication were evident. The diagnosis has been made by evidencing Thallium in the urine (colorimetric method) and in the hair (atomic absorption spectrophotometry). Moreover, the clinical and histopathological findings of Thallium alopecia are described.

Adult↗

Topical spironolactone inhibits dihydrotestosterone receptors in human sebaceous glands: an autoradiographic study in subjects with acne vulgaris.

The interaction between spironolactone and dihydrotestosterone (DHT) receptors was evaluated with an autoradiographic technique. The inhibition of DHT receptors by spironolactone was found to be related to the decrease of tritiated DHT granules in the sebaceous glands of the treated site. 6 male patients affected by acne vulgaris entered the study. The acute study was performed by applying to 25 cm2 of the back a cream containing 5% spironolactone under occlusive dressing. The dosage of spironolactone applied was 4 mg/cm2 for 48 h. The long-term study was performed by applying the same amount to the entire back, without occlusion, twice daily for 1 month. Skin biopsies were taken at the end of the treatment, incubated with tritiated DHT and processed for autoradiography. Both the acute and the long-term study revealed a decrease of the autoradiographic granules in the treated site. This effect is related to the binding of spironolactone with dihydrotestosterone receptors in the sebaceous glands. Our study demonstrates that 5% topical spironolactone cream acts as an antiandrogen in human sebaceous glands, competing with DHT receptors and producing a decrease of labelled DHT. At the concentrations used the effect has been only local. No side-effects were recorded during both studies.

Acne Vulgaris↗

Assessment of the effects of a topical product containing glycosaminoglycans in cutaneous hydration.

The hydrating power of a topically applied mixture of glycosaminoglycans has been evaluated by means of an electrical impedance method. The electrical parameters investigated, namely angle alpha and R infinity, are related to the permeability and the hydration of deeper tissues. The study revealed lowering of alpha levels after the application of the product, thus signifying an accumulation of electrical charges in the epidermis consistent with the penetration of glycosaminoglycans. After 15 days of treatment, significant reduction of R infinity levels was recorded. The relationship between R infinity levels, dermal water content and glycosaminoglycans is discussed.

Administration, Topical↗