Presowing XeCl excilamp irradiation of crops: field research and prospects

Here we present research data demonstrating how crop seeds response to ultraviolet produced by a barrier-discharge XeCl* excilamp with a wavelength of 290–320 nm (82–88 %). The data show that presowing ultraviolet treatment is stimulatory to seed germination and plant growth. Ultraviolet treatment increases the seed germinability by 20–30 % and the plant fresh weight by 54 %, compared to untreated control samples, and provides a developed root system with long twisted segments. The research results are encouraging for upgrading the UV technology to larger-scale seed irradiation

Evaluation of the metabolism properties of choline kinase alpha in neoplasms of the parathyroid glands. A pilot study

BACKGROUND: Primary hyperparathyroidism (PHPT) is a widespread endocrine disease characterized by excessive production of parathyroid hormone (PTH) due to parathyroid gland hyperplasia (PGH) or tumor lesions (adenoma or cancer of the parathyroid gland (PG) in 80% and 1–5% of cases respectively). Choline kinase α–alpha (XKα) overexpression is described in tumors of different localization, but there is no data on its expression in PG tumors. AIMS: To study the character of XKα expression in PG neoplasms and its relationship with clinical, laboratory, and visualization characteristics (positron emission tomography combined with computed tomography (PET/CT) with 18F–fluorocholine (18F–FC)). MATERIALS AND METHODS: The material for the study was based on tissue samples from 10 patients of 34–70 years old (Me = 61.5; [48; 66]), with a laboratory–confirmed diagnosis of PHT. An immunohistochemical study (IHC) was carried out on materials from 2 patients with hyperplasia of the main cells, from 5 patients with adenoma of PG, from 1 patient with atypical adenoma and 1 with carcinoma of PG; in 1 case the metastasis of cancer of the neck with lymph node was examined. RESULTS: The expression of XKα is spotted in all types of PG cells (chief cells: active and inactive forms), transitional forms between the chief cells and oxyphil; oxyphil cells, but it was most intense in active chief cells. The expression of XKα was observed in neoplasms of PG of various degrees of malignancy. In the most numerous group of PG formations with a favorable prognosis (11 samples from 7 patients), no statistically significant correlation (p> 0.05) was obtained between the intensity expression of the XKα, of the PTH and the proliferative activity index Ki–67, the level of radiopharmaceutical accumulation in PET/CT with 18F–FC (SUVmax) and laboratory data (PTH, Ca, Ca++). CONCLUSIONS: In the majority of investigated cases, moderate and intensive expression of the XKα was detected in PG cells. A small amount of studied cases does not allow us to identify the connection between the intensity of XKα expression and the malignant potential for the formation of PG

Presowing XeCl excilamp irradiation of crops: field research and prospects

Here we present research data demonstrating how crop seeds response to ultraviolet produced by a barrier-discharge XeCl* excilamp with a wavelength of 290–320 nm (82–88 %). The data show that presowing ultraviolet treatment is stimulatory to seed germination and plant growth. Ultraviolet treatment increases the seed germinability by 20–30 % and the plant fresh weight by 54 %, compared to untreated control samples, and provides a developed root system with long twisted segments. The research results are encouraging for upgrading the UV technology to larger-scale seed irradiation

Two cases synchronous atypical parathyroid adenomas and papillary thyroid carcinoma

Most clinicians are well aware of the coexistence of medullary thyroid cancer and hyperparathyroidism in hereditary and sporadic multiple endocrine neoplasia syndromes. Тhe reported incidence of nonmedullary thyroid carcinoma in patients with primary hyperparathyroidism (pHPT) is only approximately 3%. Papillary thyroid carcinomas (PTC) is a malignant epithelial tumour. PTC represent up to 87% of all thyroid carcinomas. Atypical parathyroid adenoma (APA) are a subset of parathyroid neoplasms that exhibit some of the features of parathyroid carcinoma but lack unequivocal invasive growth. APA represents about 0.54% of cases of PHPT. As a group, they may be considered tumors of uncertain malignant potential. The clinical importance, and long-term outcomes as well as appropriate operative management and surveillance are not well defined for APA probably due to the overall low prevalence as well as the lack of a standard definition of APA. We report two cases of a 63-year-old woman and 57-year-old man with a synchronous atypical parathyroid adenoma and papillary thyroid carcinoma. One of this patients had a classic symptoms of pHPT, including severe metabolic bone disease and renal disease, but another didnt have. The mean preoperative calcium was 3,48 and 4,1 (range 2.122.6) mmol/l and a mean parathyroid hormone (PTH) of 1300 and 1533 (range 1565) pg/ml, respectively. Thyroid ultrasound didnt show a nodule with features of the thyroid carcinoma in both cases. The thyroid cancer was suspected after intraoperative revision. The patients underwent a total thyroidectomy and surgical excision of the parathyroid adenoma. Surgical pathology showed papillary microcarcinoma in both cases (in the first unilateral, in the second bilateral) and APA. Awareness of this condition will enable clinicians to evaluate for possible thyroid pathology in patients with primary hyperparathyroidism. Both of these endocrine conditions could then be managed with a single surgery involving concomitant resection of the thyroid and parathyroid glands

Mathematical model for preoperative differential diagnosis for the parathyroid neoplasms

Background and objective: Preoperative diagnosis of parathyroid carcinoma (PC) is critical for the determination of the scope of surgical intervention. Nowadays, specific diagnostic markers for differentiation of PC and benign tumors are unknown, and less than half of patients with PC undergo necessary en bloc surgery. The aim of this study was to develop the instrument for preoperative diagnosis of PC. Methods: A multi-center retrospective study included 242 patients with primary hyperparathyroidism: 50 patients with PC, 30 with аtypical adenoma (AA), and 162 with adenoma of the parathyroid glands. Results: Patients with PC and AA had higher levels of PTH, ionized and albumin-corrected calcium, ALP, volume and the largest diameter of neoplasm, and the higher frequency of GFR decrease less than 60 ml/min/1.73 m2 compared to patients with adenoma. The frequency of low-energy fractures was higher in the carcinoma group versus the adenoma group (32% vs 8%). Heterogeneous structure and indefinite contour of glands detected by US were more typical for PC than for AA and adenomas. The mathematical model was developed using CatBoost gradient boosting algorithm for the noninvasive preoperative differential diagnosis of PC, AA, and adenoma. Conclusions: Model can predict adenoma with PPV 100% and PC with PPV 81–92%. Using model clinicians could plan extended en bloc resection for PC and selective parathyroidectomy for adenoma. If AA is predicted, he has to make a decision on the choice of the necessary volume of PTE based on his experience, because AA are the zone of uncertainty