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At least 199 records · Page 11Linked to original sources
PubMed1989

Effects of bamboo buds: structural and functional changes in the epididymis of rats.

An ethanolic extract of the tender shoots of Bambusa arundinaceae was administered at 300 mg/kg per rat per day for 7 days to adult male rats to assess epididymal structural and functional activity. Sperm motility decreased markedly in the cauda epididymal fluid and sperm count decreased significantly in both caput and caudal segments of the epididymis. Histologically, a reduction in epithelial and stereocilia height (in both segments) and lumen diameter (in cauda) was noted. An increase in intertubular stroma was also evident. Epididymal weights, activities of acid phosphatase and total LDH were reduced in both epididymal segments. Protein concentration was appreciably increased only in the caudal segment. Extract therapy impaired the structural and functional integrity of the epididymis.

Acid Phosphatase↗
PubMed2000

Arrestment response of the predatory mite Amblyseius longispinosus to Schizotetranychus nanjingensis webnests on bamboo leaves (Acari: Phytoseiidae, Tetranychidae).

The response of the predatory mite Amblyseius longispinosus (Acari: Phytoseiidae) to the webnest of the spider mite Schizotetranychus nanjingensis (Acari: Tetranychidae) was examined using two-choice tests in the laboratory. A. longispinosus females were found significantly more often on leaves with webnests than on leaves without webnests and were often observed searching under the webbing. Because spider mites and their eggs were removed from the webnests before experiments, predators responded to stimuli associated with webbing, mite feeding damage and other residues in the webnests.

Animals↗
PubMed2004

Venom phospholipases A2 of bamboo viper (Trimeresurus stejnegeri): molecular characterization, geographic variations and evidence of multiple ancestries.

Phospholipases A2 (PLA2s) were purified from the Trimeresurus stejnegeri venom obtained from various localities in Taiwan and three provinces in China, by gel filtration followed by reversed-phase HPLC. The precise molecular mass and N-terminal sequence of each PLA2 were determined. In addition to the six previously documented PLA2 isoforms of this species, we identified ten novel isoforms. The venom gland cDNAs of individual specimens of the viper from four localities were used for PCR and subsequent cloning of the PLA2s. The molecular masses and partial sequences of most of the purified PLA2s matched with those deduced from a total of 13 distinct cDNA sequences of these clones. Besides the commonly known Asp49 or Lys-49 PLA2s of crotalid venoms, a novel type of PLA2 with Asn-49 substitution at the Ca2+-binding site was discovered. This type of PLA2 is non-catalytic, but may cause local oedema and appears to be a venom marker of many tree vipers. In particular, we showed that T. stejnegeri displayed high geographic variations of the PLA2s within and between their Taiwanese and Chinese populations, which can be explained by geological isolation and prey ecology. A phylogenetic tree of the acidic venom PLA2s of this species and other related Asian vipers reveals that T. stejnegeri contains venom genes related to those from several sympatric pit vipers, including the genera Tropedolaemus and Gloydius besides the Trimeresurus itself. Taken together, these findings may explain the exceptionally high variations in the venom as well as the evolutionary advantage of this species.

Amino Acid Sequence↗
PubMed1998

Rescue from neutropenic fever and a bamboo pole.

We describe a patient admitted to the intensive care unit following a penetrating head injury. This patient developed agranulocytosis and subsequently pancytopenia secondary to an idiosyncratic drug reaction. The possible causative drugs are phenytoin, cloxacillin, ceftriaxone and ceftazidime. The patient was treated with recombinant human granulocyte colony-stimulating factor.

Adult↗
PubMed1984

Pathogenesis in trichorrhexis invaginata (bamboo hair).

The mechanism of formation of trichorrhexis invaginata, which is one of the characteristic hair anomalies seen in Netherton's syndrome, was studied using plucked hairs obtained from 3 patients with the typical clinical features. The biopsy specimens used to examine the hair root were obtained from the scalp of one of the patients and the eyebrow area of the other. The scanning electron microscopic observation of plucked hairs showed trichorrhexis invaginata, tortion nodule, pili torti, and trichorrhexis nodosa. The light microscopic sections of nodules of plucked hairs revealed invaginated hair cuticle into the cortex. Transmission electron microscopy revealed cleavages and electron-dense depositions in the cortex of plucked hair nodules; such changes were not seen in newly formed nodules in follicles in biopsy specimens. In the keratogenous zone, a zigzag pattern of cortical fibers and invaginations of hair cuticle cells into the cortex were observed. Histochemical staining for -SH groups and S-S linkages using N-(7-dimethylamino-4-methyl-3-coumarinyl)maleimide (DACM) was performed on frozen sections of plucked hairs from patients and normal controls. Keratinized cortical cells of patients possessed more -SH groups than the controls and a strong fluorescence for -SH was sometimes seen in the cortex of nodules. It is concluded that the invagination of affected hairs is caused by softness of the cortex in the keratogenous zone, which may result from an incomplete conversion from -SH to S-S in proteins in cortical fibers.

Adult↗