| 1. |
- Davidsson, Åke, 1956-, et al.
(författare)
-
Positive identification in situ of mRNA expression of IL-6, and IL-12, and the chemotactic cytokine RANTES in patients with chronic sinusitis and polypoid disease. Clinical relevance and relation to allergy
- 1996
-
Ingår i: Acta Oto-Laryngologica. - Oxfordshire, United Kingdom : Taylor & Francis. - 0001-6489 .- 1651-2251. ; 116:4, s. 604-610
-
Tidskriftsartikel (refereegranskat)abstract
- Interleukins 6 (IL-6) and 12 (IL-12), and the chemoattractant chemokine RANTES were studied in ethmoidal mucosa, using reverse transcriptase polymerase chain reaction. The 49 patients had chronic sinusitis or nasal/paranasal polyposis, and some also allergy. To the best of our knowledge, this is the first study that demonstrates RANTES and IL-12 on mRNA level in human sinonasal mucosa in situ. mRNA for IL-6, IL-12 and RANTES were detected in 2, 8 and 6 patients with chronic sinusitis, respectively, and in mucosa from patients with polyposis a positive expression was observed in 4, 14 and 10 cases. There were no statistically significant differences. Analysing the entire group of 49 patients, disregarding type of mucosal disease, the number of patients with positive RANTES was significantly higher than that for IL-6. Similarly, IL-12 positivity was more frequently expressed than IL-6. mRNA for IL-6 was expressed in only 2 of the allergic patients. The cytokine production studied thus seems to be unrelated to the clinically defined entities. There is thus a local production in human diseased sinonasal mucosa of RANTES, as well as of IL-6 and IL-12. The local production of RANTES is an important prerequisite for recruitment and migration of inflammatory cells into the tissue. IL-12 is a co-stimulator of antigen-specific responses of established T helper 1 (Th1) clones, and regulates the responsiveness of the clones to a number of T cell growth factors. The study supports a shift towards Th1 cells in these disease entities.
|
|
| 2. |
- Hellquist, Henrik B., et al.
(författare)
-
Tumour growth fraction and apoptosis in salivary gland acinic cell carcinomas : Prognostic implications of Ki-67 and bcl-2 expression and of in situ end labelling (TUNEL)
- 1997
-
Ingår i: The Journal of Pathology. - 0031-3025 .- 1465-3931. ; 181:3, s. 323-329
-
Tidskriftsartikel (refereegranskat)abstract
- bcl-2 protein and Ki-67 (MIB-1) were studied in 32 acinic cell carcinomas (ACCs), all with a minimum of 5 years' clinical follow-up. Tumour apoptosis was evaluated by TdT dUTP nick end labelling (TUNEL) and by morphological criteria. Five patients died of their disease. Patients with stage I tumours had significantly better survival compared with other stages (P<0·05). Patients with MIB-1-negative tumours had significantly better survival than patients with MIB-1-positive tumours (P=0·05). This study confirms a previous report that MIB-1 is an independent prognostic factor for survival in patients with ACC. Stage I tumours had high expression of bcl-2 protein, but there was no difference when compared with other stages. TUNEL positivity was most prevalent in stage I tumours, compared with stages II, III, and IV (P<0·05), probably indicating more apoptosis. This could imply a capacity of stage I tumours ('early tumours') for early selection of tumour cells for elimination by apoptosis. There was no significant difference between expression of bcl-2 and TUNEL, between these parameters and clinical outcome, or between any parameter and morphological subclassification. We conclude that MIB-1 has prognostic value in ACC. Clinical staging, bcl-2, and TUNEL are also potentially useful as prognostic markers.
|
|
| 3. |
- Karlsson, Mats G., 1960-, et al.
(författare)
-
Nasal messenger RNA expression of interleukins 2, 4, and 5 in patients with allergic rhinitis
- 1995
-
Ingår i: Diagnostic molecular pathology (Print). - Philadelphia, USA : Lippincott Williams & Wilkins. - 1052-9551 .- 1533-4066. ; 4:2, s. 85-92
-
Tidskriftsartikel (refereegranskat)abstract
- In nasal biopsies from 17 adult patients with seasonal allergic rhinitis and from 10 healthy controls, cytokines were analyzed by reverse-transcriptase polymerase chain reaction (RT-PCR). The time-course study during winter included repeated local allergen provocation with subsequent nasal biopsies as well as biopsies taken during pollen season. The RT-PCR for CD44 yielded positive bands in 65 of 71 cases, in which cases mRNA for interleukins 2, 4, and 5 (IL-2, IL-4, and IL-5) were thus investigated by means of seminested PCR. IL-4 mRNA was found almost exclusively in the allergic patients. During provocation a significant increase in IL-4 was noticed compared with controls (p = 0.043). Equally, during the natural pollen season, IL-4 mRNA expression was significantly higher in patients not using nasal corticosteroids compared with those who did (p = 0.011). No differences in IL-2 or IL-5 were observed between the groups. These findings also indicate, together with earlier observations of T-cell activation, a phenotype switch toward T-helper 2 (Th2) cells, and the accumulation (homing) of these T cells in the nasal mucosa, that T cells constitute the main source for IL-4 in the nasal mucosa. Therefore, allergic patients have an increased synthesis of IL-4 when provoked with the allergen, and during natural pollen season this synthesis can be downregulated by corticosteroids. Furthermore, this study exemplifies the versatility of molecular biology in surgical pathology and that even low-copy-number cytokine mRNA can be examined in routinely snap-frozen surgical specimens.
|
|
